Import compiler-rt r172839.vendor/compiler-rt/compiler-rt-r172839

437 files changed, 25435 insertions, 6095 deletions

diff --git a/.arcconfig b/.arcconfig
new file mode 100644
index 000000000000..413b70b05f7b
--- /dev/null
+++ b/.arcconfig
@@ -0,0 +1,4 @@
+{
+  "project_id" : "compiler-rt",
+  "conduit_uri" : "http://llvm-reviews.chandlerc.com/"
+}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 97835a1e945e..04d6e9763bf8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,49 +15,157 @@ include(LLVMParseArguments)
 # runtime libraries.
 cmake_minimum_required(VERSION 2.8.8)
 
-# FIXME: Below we assume that the target build of LLVM/Clang is x86, which is
-# not at all valid. Much of this can be fixed just by switching to use
-# a just-built-clang binary for the compiles.
+# Add path for custom modules
+set(CMAKE_MODULE_PATH
+  ${CMAKE_MODULE_PATH}
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
+  )
+include(AddCompilerRT)
+
+set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 # Detect whether the current target platform is 32-bit or 64-bit, and setup
 # the correct commandline flags needed to attempt to target 32-bit and 64-bit.
-if(CMAKE_SIZEOF_VOID_P EQUAL 4)
-  set(TARGET_X86_64_CFLAGS "-m64")
-  set(TARGET_I386_CFLAGS "")
+if(CMAKE_SIZEOF_VOID_P EQUAL 4 OR LLVM_BUILD_32_BITS)
+  set(TARGET_64_BIT_CFLAGS "-m64")
+  set(TARGET_32_BIT_CFLAGS "")
 else()
   if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
     message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.")
   endif()
-  set(TARGET_X86_64_CFLAGS "")
-  set(TARGET_I386_CFLAGS "-m32")
+  set(TARGET_64_BIT_CFLAGS "")
+  set(TARGET_32_BIT_CFLAGS "-m32")
 endif()
 
+# FIXME: Below we assume that the target build of LLVM/Clang is x86, which is
+# not at all valid. Much of this can be fixed just by switching to use
+# a just-built-clang binary for the compiles.
+
+set(TARGET_x86_64_CFLAGS ${TARGET_64_BIT_CFLAGS})
+set(TARGET_i386_CFLAGS ${TARGET_32_BIT_CFLAGS})
+
+set(COMPILER_RT_SUPPORTED_ARCH
+  x86_64 i386)
+
+function(get_target_flags_for_arch arch out_var)
+  list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
+  if(ARCH_INDEX EQUAL -1)
+    message(FATAL_ERROR "Unsupported architecture: ${arch}")
+  else()
+    set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
+  endif()
+endfunction()
+
 # Try to compile a very simple source file to ensure we can target the given
 # platform. We use the results of these tests to build only the various target
 # runtime libraries supported by our current compilers cross-compiling
 # abilities.
 set(SIMPLE_SOURCE64 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple64.c)
 file(WRITE ${SIMPLE_SOURCE64} "#include <stdlib.h>\nint main() {}")
-try_compile(CAN_TARGET_X86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64}
-            COMPILE_DEFINITIONS "${TARGET_X86_64_CFLAGS}"
-            CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_X86_64_CFLAGS}")
+try_compile(CAN_TARGET_x86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64}
+            COMPILE_DEFINITIONS "${TARGET_x86_64_CFLAGS}"
+            CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_x86_64_CFLAGS}")
 
 set(SIMPLE_SOURCE32 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple32.c)
 file(WRITE ${SIMPLE_SOURCE32} "#include <stdlib.h>\nint main() {}")
-try_compile(CAN_TARGET_I386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32}
-            COMPILE_DEFINITIONS "${TARGET_I386_CFLAGS}"
-            CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_I386_CFLAGS}")
-
-# Because compiler-rt spends a lot of time setting up custom compile flags,
-# define a handy helper function for it. The compile flags setting in CMake
-# has serious issues that make its syntax challenging at best.
-function(set_target_compile_flags target)
-  foreach(arg ${ARGN})
-    set(argstring "${argstring} ${arg}")
+try_compile(CAN_TARGET_i386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32}
+            COMPILE_DEFINITIONS "${TARGET_i386_CFLAGS}"
+            CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_i386_CFLAGS}")
+
+# We only support running instrumented tests when we're not cross compiling
+# and target a unix-like system. On Android we define the rules for building
+# unit tests, but don't execute them.
+if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
+  set(COMPILER_RT_CAN_EXECUTE_TESTS TRUE)
+else()
+  set(COMPILER_RT_CAN_EXECUTE_TESTS FALSE)
+endif()
+    
+function(filter_available_targets out_var)
+  set(archs)
+  foreach(arch ${ARGN})
+    list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
+    if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
+      list(APPEND archs ${arch})
+    endif()
   endforeach()
-  set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}")
+  set(${out_var} ${archs} PARENT_SCOPE)
 endfunction()
 
+# Provide some common commmandline flags for Sanitizer runtimes.
+set(SANITIZER_COMMON_CFLAGS
+  -fPIC
+  -fno-builtin
+  -fno-exceptions
+  -fomit-frame-pointer
+  -funwind-tables
+  -O3
+  )
+if(NOT WIN32)
+  list(APPEND SANITIZER_COMMON_CFLAGS -fvisibility=hidden)
+endif()
+# Build sanitizer runtimes with debug info.
+check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
+if(SUPPORTS_GLINE_TABLES_ONLY_FLAG)
+  list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
+else()
+  list(APPEND SANITIZER_COMMON_CFLAGS -g)
+endif()
+# Warnings suppressions.
+check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
+if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
+  list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
+endif()
+check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
+if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
+  list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
+endif()
+if(APPLE)
+  list(APPEND SANITIZER_COMMON_CFLAGS -mmacosx-version-min=10.5)
+endif()
+
+# Architectures supported by Sanitizer runtimes. Specific sanitizers may
+# support only subset of these (e.g. TSan works on x86_64 only).
+filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
+  x86_64 i386)
+
+# Compute the Clang version from the LLVM version.
+# FIXME: We should be able to reuse CLANG_VERSION variable calculated
+#        in Clang cmake files, instead of copying the rules here.
+string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
+       ${PACKAGE_VERSION})
+# Setup the paths where compiler-rt runtimes and headers should be stored.
+set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
+string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
+
+# Install compiler-rt headers.
+install(DIRECTORY include/
+  DESTINATION ${LIBCLANG_INSTALL_PATH}/include
+  FILES_MATCHING
+  PATTERN "*.h"
+  PATTERN ".svn" EXCLUDE
+  )
+
+# Call add_clang_compiler_rt_libraries to make sure that targets are built
+# and installed in the directories where Clang driver expects to find them.
+macro(add_clang_compiler_rt_libraries)
+  # Setup output directories so that clang in build tree works.
+  set_target_properties(${ARGN} PROPERTIES
+    ARCHIVE_OUTPUT_DIRECTORY
+      ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
+    LIBRARY_OUTPUT_DIRECTORY
+      ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
+    )
+  # Add installation command.
+  install(TARGETS ${ARGN}
+    ARCHIVE DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
+    LIBRARY DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
+    )
+endmacro(add_clang_compiler_rt_libraries)
+
+# Add the public header's directory to the includes for all of compiler-rt.
+include_directories(include)
+
 add_subdirectory(lib)
 
 if(LLVM_INCLUDE_TESTS)
diff --git a/LICENSE.TXT b/LICENSE.TXT
index f7179425605e..6aab1f694cc2 100644
--- a/LICENSE.TXT
+++ b/LICENSE.TXT
@@ -14,7 +14,7 @@ Full text of the relevant licenses is included below.
 University of Illinois/NCSA
 Open Source License
 
-Copyright (c) 2009-2012 by the contributors listed in CREDITS.TXT
+Copyright (c) 2009-2013 by the contributors listed in CREDITS.TXT
 
 All rights reserved.
 
@@ -55,7 +55,7 @@ SOFTWARE.
 
 ==============================================================================
 
-Copyright (c) 2009-2012 by the contributors listed in CREDITS.TXT
+Copyright (c) 2009-2013 by the contributors listed in CREDITS.TXT
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/Makefile b/Makefile
index 642b654325c8..63b05367b125 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,7 @@ test:
 %/.dir:
 	$(Summary) "  MKDIR:     $*"
 	$(Verb) $(MKDIR) $* > /dev/null
-	$(Verb) $(DATE) > $@
+	$(Verb) echo 'Created.' > $@
 
 # Remove directories
 %/.remove:
@@ -117,7 +117,7 @@ $(call Set,Tmp.Configs,$($(Tmp.Key).Configs))
 $(call Set,Tmp.ObjPath,$(ProjObjRoot)/$(Tmp.Name))
 
 # Top-Level Platform Target
-$(Tmp.Name):: $(Tmp.Configs:%=$(Tmp.ObjPath)/%/libcompiler_rt.a)
+$(Tmp.Name):: $(Tmp.Configs:%=$(Tmp.Name)-%)
 .PHONY: $(Tmp.Name)
 
 clean::
@@ -131,6 +131,15 @@ endef
 define PerPlatformConfig_template
 $(call Set,Tmp.Config,$(1))
 $(call Set,Tmp.ObjPath,$(ProjObjRoot)/$(Tmp.Name)/$(Tmp.Config))
+$(call Set,Tmp.SHARED_LIBRARY,$(strip \
+  $(call GetCNAVar,SHARED_LIBRARY,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+$(call Set,Tmp.SHARED_LIBRARY_SUFFIX,$(strip \
+  $(call GetCNAVar,SHARED_LIBRARY_SUFFIX,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+
+# Compute the library suffix.
+$(if $(call streq,1,$(Tmp.SHARED_LIBRARY)),
+  $(call Set,Tmp.LibrarySuffix,$(Tmp.SHARED_LIBRARY_SUFFIX)),
+  $(call Set,Tmp.LibrarySuffix,a))
 
 # Compute the archs to build, depending on whether this is a universal build or
 # not.
@@ -142,8 +151,8 @@ $(call Set,Tmp.ArchsToBuild,\
        $(call VarOrDefault,$(Tmp.Key).Arch.$(Tmp.Config),$($(Tmp.Key).Arch))))
 
 # Copy or lipo to create the per-config library.
-$(call Set,Tmp.Inputs,$(Tmp.ArchsToBuild:%=$(Tmp.ObjPath)/%/libcompiler_rt.a))
-$(Tmp.ObjPath)/libcompiler_rt.a: $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
+$(call Set,Tmp.Inputs,$(Tmp.ArchsToBuild:%=$(Tmp.ObjPath)/%/libcompiler_rt.$(Tmp.LibrarySuffix)))
+$(Tmp.ObjPath)/libcompiler_rt.$(Tmp.LibrarySuffix): $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
 	$(Summary) "  FINAL-ARCHIVE: $(Tmp.Name)/$(Tmp.Config): $$@"
 	-$(Verb) $(RM) $$@
 	$(if $(call streq,1,$(words $(Tmp.ArchsToBuild))), \
@@ -152,7 +161,7 @@ $(Tmp.ObjPath)/libcompiler_rt.a: $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
 .PRECIOUS: $(Tmp.ObjPath)/.dir
 
 # Per-Config Targets
-$(Tmp.Name)-$(Tmp.Config):: $(Tmp.ObjPath)/libcompiler_rt.a
+$(Tmp.Name)-$(Tmp.Config):: $(Tmp.ObjPath)/libcompiler_rt.$(Tmp.LibrarySuffix)
 .PHONY: $(Tmp.Name)-$(Tmp.Config)
 
 # Per-Config-Arch Libraries
@@ -172,10 +181,21 @@ $(call Set,Tmp.AR,$(strip \
   $(call GetCNAVar,AR,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
 $(call Set,Tmp.ARFLAGS,$(strip \
   $(call GetCNAVar,ARFLAGS,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+$(call Set,Tmp.CC,$(strip \
+  $(call GetCNAVar,CC,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+$(call Set,Tmp.LDFLAGS,$(strip \
+  $(call GetCNAVar,LDFLAGS,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
 $(call Set,Tmp.RANLIB,$(strip \
   $(call GetCNAVar,RANLIB,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
 $(call Set,Tmp.RANLIBFLAGS,$(strip \
   $(call GetCNAVar,RANLIBFLAGS,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+$(call Set,Tmp.SHARED_LIBRARY,$(strip \
+  $(call GetCNAVar,SHARED_LIBRARY,$(Tmp.Key),$(Tmp.Config),$(Tmp.Arch))))
+
+# Compute the library suffix.
+$(if $(call streq,1,$(Tmp.SHARED_LIBRARY)),
+  $(call Set,Tmp.LibrarySuffix,$(Tmp.SHARED_LIBRARY_SUFFIX)),
+  $(call Set,Tmp.LibrarySuffix,a))
 
 # Compute the object inputs for this library.
 $(call Set,Tmp.Inputs,\
@@ -188,10 +208,18 @@ $(Tmp.ObjPath)/libcompiler_rt.a: $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
 	-$(Verb) $(RM) $$@
 	$(Verb) $(Tmp.AR) $(Tmp.ARFLAGS) $$@ $(Tmp.Inputs)
 	$(Verb) $(Tmp.RANLIB) $(Tmp.RANLIBFLAGS) $$@
+$(Tmp.ObjPath)/libcompiler_rt.dylib: $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
+	$(Summary) "  DYLIB:   $(Tmp.Name)/$(Tmp.Config)/$(Tmp.Arch): $$@"
+	$(Verb) $(Tmp.CC) -arch $(Tmp.Arch) -dynamiclib -o $$@ \
+	  $(Tmp.Inputs) $(Tmp.LDFLAGS)
+$(Tmp.ObjPath)/libcompiler_rt.so: $(Tmp.Inputs) $(Tmp.ObjPath)/.dir
+	$(Summary) "  SO:   $(Tmp.Name)/$(Tmp.Config)/$(Tmp.Arch): $$@"
+	$(Verb) $(Tmp.CC) -shared -o $$@ \
+	  $(Tmp.Inputs) $(Tmp.LDFLAGS)
 .PRECIOUS: $(Tmp.ObjPath)/.dir
 
 # Per-Config-Arch Targets
-$(Tmp.Name)-$(Tmp.Config)-$(Tmp.Arch):: $(Tmp.ObjPath)/libcompiler_rt.a
+$(Tmp.Name)-$(Tmp.Config)-$(Tmp.Arch):: $(Tmp.ObjPath)/libcompiler_rt.$(Tmp.LibrarySuffix)
 .PHONY: $(Tmp.Name)-$(Tmp.Config)-$(Tmp.Arch)
 
 # Per-Config-Arch-SubDir Objects
diff --git a/SDKs/darwin/usr/include/stdio.h b/SDKs/darwin/usr/include/stdio.h
index 3b560369f326..63b10a86b632 100644
--- a/SDKs/darwin/usr/include/stdio.h
+++ b/SDKs/darwin/usr/include/stdio.h
@@ -17,6 +17,10 @@
 #ifndef __STDIO_H__
 #define __STDIO_H__
 
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
 typedef struct __sFILE FILE;
 typedef __SIZE_TYPE__ size_t;
 
@@ -51,11 +55,30 @@ typedef __SIZE_TYPE__ size_t;
 #    define stderr __stderrp
 extern FILE *__stderrp;
 
+#ifndef SEEK_SET
+#define	SEEK_SET	0	/* set file offset to offset */
+#endif
+#ifndef SEEK_CUR
+#define	SEEK_CUR	1	/* set file offset to current plus offset */
+#endif
+#ifndef SEEK_END
+#define	SEEK_END	2	/* set file offset to EOF plus offset */
+#endif
+
 int fclose(FILE *);
 int fflush(FILE *);
-FILE *fopen(const char * restrict, const char * restrict) __asm(__FOPEN_NAME);
-int fprintf(FILE * restrict, const char * restrict, ...);
-size_t fwrite(const void * restrict, size_t, size_t, FILE * restrict)
+FILE *fopen(const char * __restrict, const char * __restrict) __asm(__FOPEN_NAME);
+int fprintf(FILE * __restrict, const char * __restrict, ...);
+size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict)
   __asm(__FWRITE_NAME);
+size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
+long ftell(FILE *);
+int fseek(FILE *, long, int);
+
+int snprintf(char * __restrict, size_t, const char * __restrict, ...);
+
+#if defined(__cplusplus)
+}
+#endif
 
 #endif /* __STDIO_H__ */
diff --git a/SDKs/linux/usr/include/stdio.h b/SDKs/linux/usr/include/stdio.h
index ddfe75548793..7c258d2aca17 100644
--- a/SDKs/linux/usr/include/stdio.h
+++ b/SDKs/linux/usr/include/stdio.h
@@ -26,10 +26,17 @@ extern struct _IO_FILE *stdin;
 extern struct _IO_FILE *stdout;
 extern struct _IO_FILE *stderr;
 
+#define	SEEK_SET	0	/* set file offset to offset */
+#define	SEEK_CUR	1	/* set file offset to current plus offset */
+#define	SEEK_END	2	/* set file offset to EOF plus offset */
+
 extern int fclose(FILE *);
 extern int fflush(FILE *);
 extern FILE *fopen(const char * restrict, const char * restrict);
 extern int fprintf(FILE * restrict, const char * restrict, ...);
 extern size_t fwrite(const void * restrict, size_t, size_t, FILE * restrict);
+extern size_t fread(void * restrict, size_t, size_t, FILE * restrict);
+extern long ftell(FILE *);
+extern int fseek(FILE *, long, int);
 
 #endif /* __STDIO_H__ */
diff --git a/cmake/Modules/AddCompilerRT.cmake b/cmake/Modules/AddCompilerRT.cmake
new file mode 100644
index 000000000000..e90253fdfa1e
--- /dev/null
+++ b/cmake/Modules/AddCompilerRT.cmake
@@ -0,0 +1,49 @@
+include(AddLLVM)
+include(LLVMParseArguments)
+include(CompilerRTUtils)
+
+# Tries to add "object library" target for a given architecture
+# with name "<name>.<arch>" if architecture can be targeted.
+# add_compiler_rt_object_library(<name> <arch>
+#                                SOURCES <source files>
+#                                CFLAGS <compile flags>)
+macro(add_compiler_rt_object_library name arch)
+  if(CAN_TARGET_${arch})
+    parse_arguments(LIB "SOURCES;CFLAGS" "" ${ARGN})
+    add_library(${name}.${arch} OBJECT ${LIB_SOURCES})
+    set_target_compile_flags(${name}.${arch}
+      ${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS})
+  else()
+    message(FATAL_ERROR "Archtecture ${arch} can't be targeted")
+  endif()
+endmacro()
+
+# Unittests support.
+set(COMPILER_RT_GTEST_PATH ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest)
+set(COMPILER_RT_GTEST_SOURCE ${COMPILER_RT_GTEST_PATH}/gtest-all.cc)
+set(COMPILER_RT_GTEST_INCLUDE_CFLAGS
+  -DGTEST_NO_LLVM_RAW_OSTREAM=1
+  -I${COMPILER_RT_GTEST_PATH}/include
+)
+
+# Use Clang to link objects into a single executable with just-built
+# Clang, using specific link flags. Make executable a part of provided
+# test_suite.
+# add_compiler_rt_test(<test_suite> <test_name>
+#                      OBJECTS <object files>
+#                      DEPS <deps (e.g. runtime libs)>
+#                      LINK_FLAGS <link flags>)
+macro(add_compiler_rt_test test_suite test_name)
+  parse_arguments(TEST "OBJECTS;DEPS;LINK_FLAGS" "" ${ARGN})
+  get_unittest_directory(OUTPUT_DIR)
+  file(MAKE_DIRECTORY ${OUTPUT_DIR})
+  set(output_bin "${OUTPUT_DIR}/${test_name}")
+  add_custom_command(
+    OUTPUT ${output_bin}
+    COMMAND clang ${TEST_OBJECTS} -o "${output_bin}"
+            ${TEST_LINK_FLAGS}
+    DEPENDS clang ${TEST_DEPS})
+  add_custom_target(${test_name} DEPENDS ${output_bin})
+  # Make the test suite depend on the binary.
+  add_dependencies(${test_suite} ${test_name})
+endmacro()
diff --git a/cmake/Modules/CompilerRTCompile.cmake b/cmake/Modules/CompilerRTCompile.cmake
new file mode 100644
index 000000000000..2794cabe59c5
--- /dev/null
+++ b/cmake/Modules/CompilerRTCompile.cmake
@@ -0,0 +1,16 @@
+include(LLVMParseArguments)
+
+# Compile a source into an object file with just-built Clang using
+# a provided compile flags and dependenices.
+# clang_compile(<object> <source>
+#               CFLAGS <list of compile flags>
+#               DEPS <list of dependencies>)
+macro(clang_compile object_file source)
+  parse_arguments(SOURCE "CFLAGS;DEPS" "" ${ARGN})
+  get_filename_component(source_rpath ${source} REALPATH)
+  add_custom_command(
+    OUTPUT ${object_file}
+    COMMAND clang ${SOURCE_CFLAGS} -c -o "${object_file}" ${source_rpath}
+    MAIN_DEPENDENCY ${source}
+    DEPENDS clang ${SOURCE_DEPS})
+endmacro()
diff --git a/cmake/Modules/CompilerRTLink.cmake b/cmake/Modules/CompilerRTLink.cmake
new file mode 100644
index 000000000000..85030a725e19
--- /dev/null
+++ b/cmake/Modules/CompilerRTLink.cmake
@@ -0,0 +1,14 @@
+include(LLVMParseArguments)
+
+# Link a shared library with just-built Clang.
+# clang_link_shared(<output.so>
+#                   OBJECTS <list of input objects>
+#                   LINKFLAGS <list of link flags>
+#                   DEPS <list of dependencies>)
+macro(clang_link_shared so_file)
+  parse_arguments(SOURCE "OBJECTS;LINKFLAGS;DEPS" "" ${ARGN})
+  add_custom_command(
+    OUTPUT ${so_file}
+    COMMAND clang -o "${so_file}" -shared ${SOURCE_LINKFLAGS} ${SOURCE_OBJECTS}
+    DEPENDS clang ${SOURCE_DEPS})
+endmacro()
diff --git a/cmake/Modules/CompilerRTUtils.cmake b/cmake/Modules/CompilerRTUtils.cmake
new file mode 100644
index 000000000000..50f068091e64
--- /dev/null
+++ b/cmake/Modules/CompilerRTUtils.cmake
@@ -0,0 +1,17 @@
+# Because compiler-rt spends a lot of time setting up custom compile flags,
+# define a handy helper function for it. The compile flags setting in CMake
+# has serious issues that make its syntax challenging at best.
+function(set_target_compile_flags target)
+  foreach(arg ${ARGN})
+    set(argstring "${argstring} ${arg}")
+  endforeach()
+  set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}")
+endfunction()
+
+function(set_target_link_flags target)
+  foreach(arg ${ARGN})
+    set(argstring "${argstring} ${arg}")
+  endforeach()
+  set_property(TARGET ${target} PROPERTY LINK_FLAGS "${argstring}")
+endfunction()
+
diff --git a/lib/asan/asan_interface.h b/include/sanitizer/asan_interface.h
index c625a6217c0c..6afc3800f4e7 100644
--- a/lib/asan/asan_interface.h
+++ b/include/sanitizer/asan_interface.h
@@ -1,4 +1,4 @@
-//===-- asan_interface.h ----------------------------------------*- C++ -*-===//
+//===-- sanitizer/asan_interface.h ------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -12,10 +12,11 @@
 // This header can be included by the instrumented program to fetch
 // data (mostly allocator statistics) from ASan runtime library.
 //===----------------------------------------------------------------------===//
-#ifndef ASAN_INTERFACE_H
-#define ASAN_INTERFACE_H
+#ifndef SANITIZER_ASAN_INTERFACE_H
+#define SANITIZER_ASAN_INTERFACE_H
+
+#include <sanitizer/common_interface_defs.h>
 
-#include "sanitizer_common/sanitizer_interface_defs.h"
 // ----------- ATTENTION -------------
 // This header should NOT include any other headers from ASan runtime.
 // All functions in this header are extern "C" and start with __asan_.
@@ -27,17 +28,13 @@ extern "C" {
   // before any instrumented code is executed and before any call to malloc.
   void __asan_init() SANITIZER_INTERFACE_ATTRIBUTE;
 
-  // This function should be called by the instrumented code.
-  // 'addr' is the address of a global variable called 'name' of 'size' bytes.
-  void __asan_register_global(uptr addr, uptr size, const char *name)
-      SANITIZER_INTERFACE_ATTRIBUTE;
-
   // This structure describes an instrumented global variable.
   struct __asan_global {
     uptr beg;                // The address of the global.
     uptr size;               // The original size of the global.
     uptr size_with_redzone;  // The size with the redzone.
-    const char *name;          // Name as a C string.
+    const char *name;        // Name as a C string.
+    uptr has_dynamic_init;   // Non-zero if the global has dynamic initializer.
   };
 
   // These two functions should be called by the instrumented code.
@@ -47,6 +44,14 @@ extern "C" {
   void __asan_unregister_globals(__asan_global *globals, uptr n)
       SANITIZER_INTERFACE_ATTRIBUTE;
 
+  // These two functions should be called before and after dynamic initializers
+  // run, respectively.  They should be called with parameters describing all
+  // dynamically initialized globals defined in the calling TU.
+  void __asan_before_dynamic_init(uptr first_addr, uptr last_addr)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+  void __asan_after_dynamic_init()
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
   // These two functions are used by the instrumented code in the
   // use-after-return mode. __asan_stack_malloc allocates size bytes of
   // fake stack and __asan_stack_free poisons it. real_stack is a pointer to
@@ -56,6 +61,15 @@ extern "C" {
   void __asan_stack_free(uptr ptr, uptr size, uptr real_stack)
       SANITIZER_INTERFACE_ATTRIBUTE;
 
+  // These two functions are used by instrumented code in the
+  // use-after-scope mode. They mark memory for local variables as
+  // unaddressable when they leave scope and addressable before the
+  // function exits.
+  void __asan_poison_stack_memory(uptr addr, uptr size)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+  void __asan_unpoison_stack_memory(uptr addr, uptr size)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
   // Marks memory region [addr, addr+size) as unaddressable.
   // This memory must be previously allocated by the user program. Accessing
   // addresses in this region from instrumented code is forbidden until
@@ -98,6 +112,15 @@ extern "C" {
   bool __asan_address_is_poisoned(void const volatile *addr)
       SANITIZER_INTERFACE_ATTRIBUTE;
 
+  // If at least on byte in [beg, beg+size) is poisoned, return the address
+  // of the first such byte. Otherwise return 0.
+  uptr __asan_region_is_poisoned(uptr beg, uptr size)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
+  // Print the description of addr (useful when debugging in gdb).
+  void __asan_describe_address(uptr addr)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
   // This is an internal function that is called to report an error.
   // However it is still a part of the interface because users may want to
   // set a breakpoint on this function in a debugger.
@@ -118,6 +141,21 @@ extern "C" {
   void __asan_set_error_report_callback(void (*callback)(const char*))
       SANITIZER_INTERFACE_ATTRIBUTE;
 
+  // User may provide function that would be called right when ASan detects
+  // an error. This can be used to notice cases when ASan detects an error, but
+  // the program crashes before ASan report is printed.
+  /* OPTIONAL */ void __asan_on_error()
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+
+  // User may provide its own implementation for symbolization function.
+  // It should print the description of instruction at address "pc" to
+  // "out_buffer". Description should be at most "out_size" bytes long.
+  // User-specified function should return true if symbolization was
+  // successful.
+  /* OPTIONAL */ bool __asan_symbolize(const void *pc, char *out_buffer,
+                                       int out_size)
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+
   // Returns the estimated number of bytes that will be reserved by allocator
   // for request of "size" bytes. If ASan allocator can't allocate that much
   // memory, returns the maximal possible allocation size, otherwise returns
@@ -154,6 +192,21 @@ extern "C" {
   // Prints accumulated stats to stderr. Used for debugging.
   void __asan_print_accumulated_stats()
       SANITIZER_INTERFACE_ATTRIBUTE;
-}  // namespace
 
-#endif  // ASAN_INTERFACE_H
+  // This function may be optionally provided by user and should return
+  // a string containing ASan runtime options. See asan_flags.h for details.
+  /* OPTIONAL */ const char* __asan_default_options()
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+
+  // Malloc hooks that may be optionally provided by user.
+  // __asan_malloc_hook(ptr, size) is called immediately after
+  //   allocation of "size" bytes, which returned "ptr".
+  // __asan_free_hook(ptr) is called immediately before
+  //   deallocation of "ptr".
+  /* OPTIONAL */ void __asan_malloc_hook(void *ptr, uptr size)
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+  /* OPTIONAL */ void __asan_free_hook(void *ptr)
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+}  // extern "C"
+
+#endif  // SANITIZER_ASAN_INTERFACE_H
diff --git a/lib/sanitizer_common/sanitizer_interface_defs.h b/include/sanitizer/common_interface_defs.h
index 2395ea505657..9d8fa5582b67 100644
--- a/lib/sanitizer_common/sanitizer_interface_defs.h
+++ b/include/sanitizer/common_interface_defs.h
@@ -1,4 +1,4 @@
-//===-- sanitizer_interface_defs.h -----------------------------*- C++ -*-===//
+//===-- sanitizer/common_interface_defs.h -----------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -12,8 +12,8 @@
 // NOTE: This file may be included into user code.
 //===----------------------------------------------------------------------===//
 
-#ifndef SANITIZER_INTERFACE_DEFS_H
-#define SANITIZER_INTERFACE_DEFS_H
+#ifndef SANITIZER_COMMON_INTERFACE_DEFS_H
+#define SANITIZER_COMMON_INTERFACE_DEFS_H
 
 // ----------- ATTENTION -------------
 // This header should NOT include any other headers to avoid portability issues.
@@ -30,6 +30,12 @@
 # define SANITIZER_WEAK_ATTRIBUTE  __attribute__((weak))
 #endif
 
+#ifdef __linux__
+# define SANITIZER_SUPPORTS_WEAK_HOOKS 1
+#else
+# define SANITIZER_SUPPORTS_WEAK_HOOKS 0
+#endif
+
 // __has_feature
 #if !defined(__has_feature)
 # define __has_feature(x) 0
@@ -40,8 +46,21 @@
 // in a portable way by the language itself.
 namespace __sanitizer {
 
+#if defined(_WIN64)
+// 64-bit Windows uses LLP64 data model.
+typedef unsigned long long uptr;  // NOLINT
+typedef signed   long long sptr;  // NOLINT
+#else
 typedef unsigned long uptr;  // NOLINT
 typedef signed   long sptr;  // NOLINT
+#endif  // defined(_WIN64)
+#if defined(__x86_64__)
+// Since x32 uses ILP32 data model in 64-bit hardware mode,  we must use
+// 64-bit pointer to unwind stack frame.
+typedef unsigned long long uhwptr;  // NOLINT
+#else
+typedef uptr uhwptr;   // NOLINT
+#endif
 typedef unsigned char u8;
 typedef unsigned short u16;  // NOLINT
 typedef unsigned int u32;
@@ -53,4 +72,21 @@ typedef signed   long long s64;  // NOLINT
 
 }  // namespace __sanitizer
 
-#endif  // SANITIZER_INTERFACE_DEFS_H
+extern "C" {
+  // Tell the tools to write their reports to "path.<pid>" instead of stderr.
+  void __sanitizer_set_report_path(const char *path)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
+  // Tell the tools to write their reports to given file descriptor instead of
+  // stderr.
+  void __sanitizer_set_report_fd(int fd)
+      SANITIZER_INTERFACE_ATTRIBUTE;
+
+  // Notify the tools that the sandbox is going to be turned on. The reserved
+  // parameter will be used in the future to hold a structure with functions
+  // that the tools may call to bypass the sandbox.
+  void __sanitizer_sandbox_on_notify(void *reserved)
+      SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE;
+}  // extern "C"
+
+#endif  // SANITIZER_COMMON_INTERFACE_DEFS_H
diff --git a/include/sanitizer/msan_interface.h b/include/sanitizer/msan_interface.h
new file mode 100644
index 000000000000..1a76dd60599f
--- /dev/null
+++ b/include/sanitizer/msan_interface.h
@@ -0,0 +1,124 @@
+//===-- msan_interface.h --------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemorySanitizer.
+//
+// Public interface header.
+//===----------------------------------------------------------------------===//
+#ifndef MSAN_INTERFACE_H
+#define MSAN_INTERFACE_H
+
+#include <sanitizer/common_interface_defs.h>
+
+using __sanitizer::uptr;
+using __sanitizer::sptr;
+using __sanitizer::u32;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// FIXME: document all interface functions.
+
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_get_track_origins();
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_init();
+
+// Print a warning and maybe return.
+// This function can die based on flags()->exit_code.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_warning();
+
+// Print a warning and die.
+// Intrumentation inserts calls to this function when building in "fast" mode
+// (i.e. -mllvm -msan-keep-going)
+SANITIZER_INTERFACE_ATTRIBUTE __attribute__((noreturn))
+void __msan_warning_noreturn();
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_unpoison(void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_clear_and_unpoison(void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memcpy(void *dst, const void *src, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memset(void *s, int c, uptr n);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memmove(void* dest, const void* src, uptr n);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_copy_poison(void *dst, const void *src, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_copy_origin(void *dst, const void *src, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_move_poison(void *dst, const void *src, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_poison(void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_poison_stack(void *a, uptr size);
+
+// Copy size bytes from src to dst and unpoison the result.
+// Useful to implement unsafe loads.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_load_unpoisoned(void *src, uptr size, void *dst);
+
+// Returns the offset of the first (at least partially) poisoned byte,
+// or -1 if the whole range is good.
+SANITIZER_INTERFACE_ATTRIBUTE
+sptr __msan_test_shadow(const void *x, uptr size);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_origin(void *a, uptr size, u32 origin);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_alloca_origin(void *a, uptr size, const char *descr);
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __msan_get_origin(void *a);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_clear_on_return();
+
+// Default: -1 (don't exit on error).
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_exit_code(int exit_code);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_set_poison_in_malloc(int do_poison);
+
+// For testing.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_expect_umr(int expect_umr);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_break_optimization(void *x);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_print_shadow(const void *x, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_print_param_shadow();
+SANITIZER_INTERFACE_ATTRIBUTE
+int  __msan_has_dynamic_component();
+
+// Returns x such that %fs:x is the first byte of __msan_retval_tls.
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_get_retval_tls_offset();
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_get_param_tls_offset();
+
+// For testing.
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __msan_get_origin_tls();
+SANITIZER_INTERFACE_ATTRIBUTE
+const char *__msan_get_origin_descr_if_stack(u32 id);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_partial_poison(void* data, void* shadow, uptr size);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 67019655332a..fa6d8abc65e6 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -1,34 +1,23 @@
-# Compute the Clang version from the LLVM version.
-# FIXME: We should be able to reuse CLANG_VERSION variable calculated
-#        in Clang cmake files, instead of copying the rules here.
-string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
-       ${PACKAGE_VERSION})
-
-# Call add_clang_runtime_static_library(<target_library>) to make
-# sure that static <target_library> is built in the directory
-# where Clang driver expects to find it.
-if (APPLE)
-  set(CLANG_RUNTIME_LIB_DIR
-      ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/darwin)
-elseif (UNIX)
-  # Assume Linux.
-  set(CLANG_RUNTIME_LIB_DIR
-      ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/linux)
-endif()
-function(add_clang_runtime_static_library target_name)
-  set_target_properties(${target_name} PROPERTIES
-                        ARCHIVE_OUTPUT_DIRECTORY ${CLANG_RUNTIME_LIB_DIR})
-endfunction()
-
 # First, add the subdirectories which contain feature-based runtime libraries
 # and several convenience helper libraries.
-add_subdirectory(asan)
-add_subdirectory(interception)
-add_subdirectory(sanitizer_common)
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin|Linux")
+  # AddressSanitizer is supported on Linux and Mac OS X.
+  # Windows support is work in progress.
+  add_subdirectory(asan)
+  add_subdirectory(interception)
+  add_subdirectory(sanitizer_common)
+  if(NOT ANDROID)
+    add_subdirectory(ubsan)
+  endif()
+endif()
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND NOT ANDROID)
+  # ThreadSanitizer and MemorySanitizer are supported on Linux only.
+  add_subdirectory(tsan)
+  add_subdirectory(msan)
+endif()
 
 # FIXME: Add support for the profile library.
 
-
 # The top-level lib directory contains a large amount of C code which provides
 # generic implementations of the core runtime library along with optimized
 # architecture-specific code in various subdirectories.
@@ -163,7 +152,7 @@ set(GENERIC_SOURCES
   umodti3.c
   )
 
-if(CAN_TARGET_X86_64)
+if(CAN_TARGET_x86_64)
   add_library(clang_rt.x86_64 STATIC
     x86_64/floatdidf.c
     x86_64/floatdisf.c
@@ -173,9 +162,10 @@ if(CAN_TARGET_X86_64)
     x86_64/floatundixf.S
     ${GENERIC_SOURCES}
     )
-  set_target_properties(clang_rt.x86_64 PROPERTIES COMPILE_FLAGS "-std=c99 ${TARGET_X86_64_CFLAGS}")
+  set_target_properties(clang_rt.x86_64 PROPERTIES COMPILE_FLAGS "-std=c99 ${TARGET_x86_64_CFLAGS}")
+  add_clang_compiler_rt_libraries(clang_rt.x86_64)
 endif()
-if(CAN_TARGET_I386)
+if(CAN_TARGET_i386)
   add_library(clang_rt.i386 STATIC
     i386/ashldi3.S
     i386/ashrdi3.S
@@ -193,5 +183,6 @@ if(CAN_TARGET_I386)
     i386/umoddi3.S
     ${GENERIC_SOURCES}
     )
-  set_target_properties(clang_rt.i386 PROPERTIES COMPILE_FLAGS "-std=c99 ${TARGET_I386_CFLAGS}")
+  set_target_properties(clang_rt.i386 PROPERTIES COMPILE_FLAGS "-std=c99 ${TARGET_i386_CFLAGS}")
+  add_clang_compiler_rt_libraries(clang_rt.i386)
 endif()
diff --git a/lib/Makefile.mk b/lib/Makefile.mk
index 791921a80068..ea471e01b1e6 100644
--- a/lib/Makefile.mk
+++ b/lib/Makefile.mk
@@ -19,6 +19,7 @@ SubDirs += interception
 SubDirs += profile
 SubDirs += sanitizer_common
 SubDirs += tsan
+SubDirs += ubsan
 
 # FIXME: We don't currently support building an atomic library, and as it must
 # be a separate library from the runtime library, we need to remove its source
diff --git a/lib/arm/Makefile.mk b/lib/arm/Makefile.mk
index e7bbd7b615d5..04dec88a9714 100644
--- a/lib/arm/Makefile.mk
+++ b/lib/arm/Makefile.mk
@@ -9,7 +9,7 @@
 
 ModuleName := builtins
 SubDirs := 
-OnlyArchs := armv5 armv6 armv7
+OnlyArchs := armv5 armv6 armv7 armv7f armv7k armv7s
 
 AsmSources := $(foreach file,$(wildcard $(Dir)/*.S),$(notdir $(file)))
 Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))
diff --git a/lib/arm/divsi3.S b/lib/arm/divsi3.S
index 00e61815ab4f..e76fe31bb782 100644
--- a/lib/arm/divsi3.S
+++ b/lib/arm/divsi3.S
@@ -25,7 +25,16 @@
 // Ok, APCS and AAPCS agree on 32 bit args, so it's safe to use the same routine.
 DEFINE_AEABI_FUNCTION_ALIAS(__aeabi_idiv, __divsi3)
 DEFINE_COMPILERRT_FUNCTION(__divsi3)
-    ESTABLISH_FRAME
+#if __ARM_ARCH_7S__
+   tst     r1,r1
+   beq     LOCAL_LABEL(divzero)
+   sdiv    r0, r0, r1
+   bx      lr
+LOCAL_LABEL(divzero):
+   mov     r0,#0
+   bx      lr
+#else
+ESTABLISH_FRAME
 //  Set aside the sign of the quotient.
     eor     r4,     r0, r1
 //  Take absolute value of a and b via abs(x) = (x^(x >> 31)) - (x >> 31).
@@ -39,3 +48,4 @@ DEFINE_COMPILERRT_FUNCTION(__divsi3)
     eor     r0,     r0, r4, asr #31
     sub     r0,     r0, r4, asr #31
     CLEAR_FRAME_AND_RETURN
+#endif
diff --git a/lib/arm/udivsi3.S b/lib/arm/udivsi3.S
index 6d8966539c7f..28979fee4bdc 100644
--- a/lib/arm/udivsi3.S
+++ b/lib/arm/udivsi3.S
@@ -33,6 +33,15 @@
 // Ok, APCS and AAPCS agree on 32 bit args, so it's safe to use the same routine.
 DEFINE_AEABI_FUNCTION_ALIAS(__aeabi_uidiv, __udivsi3)
 DEFINE_COMPILERRT_FUNCTION(__udivsi3)
+#if __ARM_ARCH_7S__
+	tst	r1,r1
+	beq	LOCAL_LABEL(divzero)
+	udiv	r0, r0, r1
+	bx  	lr
+	LOCAL_LABEL(divzero):
+	mov	r0,#0
+	bx	lr
+#else
 //  We use a simple digit by digit algorithm; before we get into the actual 
 //  divide loop, we must calculate the left-shift amount necessary to align
 //  the MSB of the divisor with that of the dividend (If this shift is
@@ -78,3 +87,4 @@ LOCAL_LABEL(return):
 //  Move the quotient to r0 and return.
     mov     r0,     q
     CLEAR_FRAME_AND_RETURN
+#endif
diff --git a/lib/asan/CMakeLists.txt b/lib/asan/CMakeLists.txt
index ce985f528172..92cba6dee622 100644
--- a/lib/asan/CMakeLists.txt
+++ b/lib/asan/CMakeLists.txt
@@ -2,6 +2,8 @@
 
 set(ASAN_SOURCES
   asan_allocator.cc
+  asan_allocator2.cc
+  asan_fake_stack.cc
   asan_globals.cc
   asan_interceptors.cc
   asan_linux.cc
@@ -12,7 +14,7 @@ set(ASAN_SOURCES
   asan_new_delete.cc
   asan_poisoning.cc
   asan_posix.cc
-  asan_printf.cc
+  asan_report.cc
   asan_rtl.cc
   asan_stack.cc
   asan_stats.cc
@@ -21,62 +23,99 @@ set(ASAN_SOURCES
   asan_win.cc
   )
 
+set(ASAN_DYLIB_SOURCES
+  ${ASAN_SOURCES}
+  dynamic/asan_interceptors_dynamic.cc
+  )
+
 include_directories(..)
 
-set(ASAN_CFLAGS
-  -fPIC
-  -fno-exceptions
-  -funwind-tables
-  -fvisibility=hidden
-  -fno-builtin
-  -fomit-frame-pointer
-  -O3
-  )
-if (SUPPORTS_NO_VARIADIC_MACROS_FLAG)
-  list(APPEND ASAN_CFLAGS -Wno-variadic-macros)
-endif ()
+set(ASAN_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 
-if (APPLE)
-  list(APPEND ASAN_CFLAGS -mmacosx-version-min=10.5)
+if(ANDROID)
+  set(ASAN_COMMON_DEFINITIONS
+    ASAN_HAS_EXCEPTIONS=1
+    ASAN_FLEXIBLE_MAPPING_AND_OFFSET=0
+    ASAN_NEEDS_SEGV=0
+    ASAN_LOW_MEMORY=1
+    )
+else()
+  set(ASAN_COMMON_DEFINITIONS
+    ASAN_HAS_EXCEPTIONS=1
+    ASAN_FLEXIBLE_MAPPING_AND_OFFSET=0
+    ASAN_NEEDS_SEGV=1
+    )
 endif()
 
-set(ASAN_COMMON_DEFINITIONS
-  ASAN_HAS_EXCEPTIONS=1
-  ASAN_NEEDS_SEGV=1
+set(ASAN_DYLIB_DEFINITIONS
+  ${ASAN_COMMON_DEFINITIONS}
+  MAC_INTERPOSE_FUNCTIONS=1
   )
 
-# FIXME: We need to build universal binaries on OS X instead of
-# two arch-specific binaries.
+# Architectures supported by ASan.
+filter_available_targets(ASAN_SUPPORTED_ARCH
+  x86_64 i386)
 
-if(CAN_TARGET_X86_64)
-  add_library(clang_rt.asan-x86_64 STATIC
+set(ASAN_RUNTIME_LIBRARIES)
+if(APPLE)
+  # Build universal binary on APPLE.
+  add_library(clang_rt.asan_osx STATIC
     ${ASAN_SOURCES}
-    $<TARGET_OBJECTS:RTInterception.x86_64>
-    $<TARGET_OBJECTS:RTSanitizerCommon.x86_64>
-    )
-  set_target_compile_flags(clang_rt.asan-x86_64
-    ${ASAN_CFLAGS}
-    ${TARGET_X86_64_CFLAGS}
+    $<TARGET_OBJECTS:RTInterception.osx>
+    $<TARGET_OBJECTS:RTSanitizerCommon.osx>
     )
-  set_property(TARGET clang_rt.asan-x86_64 APPEND PROPERTY COMPILE_DEFINITIONS
-    ${ASAN_COMMON_DEFINITIONS})
-  add_clang_runtime_static_library(clang_rt.asan-x86_64)
-endif()
-if(CAN_TARGET_I386)
-  add_library(clang_rt.asan-i386 STATIC
+  set_target_compile_flags(clang_rt.asan_osx ${ASAN_CFLAGS})
+  set_target_properties(clang_rt.asan_osx PROPERTIES
+    OSX_ARCHITECTURES "${ASAN_SUPPORTED_ARCH}")
+  list(APPEND ASAN_RUNTIME_LIBRARIES clang_rt.asan_osx)
+elseif(ANDROID)
+  add_library(clang_rt.asan-arm-android SHARED
     ${ASAN_SOURCES}
-    $<TARGET_OBJECTS:RTInterception.i386>
-    $<TARGET_OBJECTS:RTSanitizerCommon.i386>
+    $<TARGET_OBJECTS:RTInterception.arm.android>
+    $<TARGET_OBJECTS:RTSanitizerCommon.arm.android>
     )
-  set_target_compile_flags(clang_rt.asan-i386
+  set_target_compile_flags(clang_rt.asan-arm-android
     ${ASAN_CFLAGS}
-    ${TARGET_I386_CFLAGS}
     )
-  set_property(TARGET clang_rt.asan-i386 APPEND PROPERTY COMPILE_DEFINITIONS
-    ${ASAN_COMMON_DEFINITIONS})
-  add_clang_runtime_static_library(clang_rt.asan-i386)
+  target_link_libraries(clang_rt.asan-arm-android dl)
+  list(APPEND ASAN_RUNTIME_LIBRARIES clang_rt.asan-arm-android)
+else()
+  # Otherwise, build separate libraries for each target.
+  foreach(arch ${ASAN_SUPPORTED_ARCH})
+    add_library(clang_rt.asan-${arch} STATIC
+      ${ASAN_SOURCES}
+      $<TARGET_OBJECTS:RTInterception.${arch}>
+      $<TARGET_OBJECTS:RTSanitizerCommon.${arch}>)
+    set_target_compile_flags(clang_rt.asan-${arch}
+      ${ASAN_CFLAGS} ${TARGET_${arch}_CFLAGS})
+    list(APPEND ASAN_RUNTIME_LIBRARIES clang_rt.asan-${arch})
+  endforeach()
 endif()
 
+set_property(TARGET ${ASAN_RUNTIME_LIBRARIES} APPEND PROPERTY
+  COMPILE_DEFINITIONS ${ASAN_COMMON_DEFINITIONS})
+add_clang_compiler_rt_libraries(${ASAN_RUNTIME_LIBRARIES})
+
+set(ASAN_DYNAMIC_RUNTIME_LIBRARIES)
+if(APPLE)
+  # Build universal binary on APPLE.
+  add_library(clang_rt.asan_osx_dynamic SHARED
+    ${ASAN_DYLIB_SOURCES}
+    $<TARGET_OBJECTS:RTInterception.osx>
+    $<TARGET_OBJECTS:RTSanitizerCommon.osx>
+    )
+  set_target_compile_flags(clang_rt.asan_osx_dynamic ${ASAN_CFLAGS})
+  set_target_properties(clang_rt.asan_osx_dynamic PROPERTIES
+    COMPILE_DEFINITIONS "${ASAN_DYLIB_DEFINITIONS}"
+    OSX_ARCHITECTURES "${ASAN_SUPPORTED_ARCH}"
+    LINK_FLAGS "-framework Foundation")
+  list(APPEND ASAN_DYNAMIC_RUNTIME_LIBRARIES clang_rt.asan_osx_dynamic)
+endif()
+add_clang_compiler_rt_libraries(${ASAN_DYNAMIC_RUNTIME_LIBRARIES})
+
+
 if(LLVM_INCLUDE_TESTS)
   add_subdirectory(tests)
 endif()
+
+add_subdirectory(lit_tests)
diff --git a/lib/asan/Makefile.mk b/lib/asan/Makefile.mk
index 9d1a2e8a9a28..af9602e8b242 100644
--- a/lib/asan/Makefile.mk
+++ b/lib/asan/Makefile.mk
@@ -8,7 +8,7 @@
 #===------------------------------------------------------------------------===#
 
 ModuleName := asan
-SubDirs :=
+SubDirs := dynamic
 
 Sources := $(foreach file,$(wildcard $(Dir)/*.cc),$(notdir $(file)))
 ObjNames := $(Sources:%.cc=%.o)
@@ -17,8 +17,9 @@ Implementation := Generic
 
 # FIXME: use automatic dependencies?
 Dependencies := $(wildcard $(Dir)/*.h)
-Dependencies += $(wildcard $(Dir)/interception/*.h)
-Dependencies += $(wildcard $(Dir)/interception/mach_override/*.h)
+Dependencies += $(wildcard $(Dir)/../interception/*.h)
+Dependencies += $(wildcard $(Dir)/../interception/mach_override/*.h)
+Dependencies += $(wildcard $(Dir)/../sanitizer_common/*.h)
 
 # Define a convenience variable for all the asan functions.
 AsanFunctions := $(Sources:%.cc=%)
diff --git a/lib/asan/Makefile.old b/lib/asan/Makefile.old
deleted file mode 100644
index 4ab80e20bcb1..000000000000
--- a/lib/asan/Makefile.old
+++ /dev/null
@@ -1,349 +0,0 @@
-#===- lib/asan/Makefile.old --------------------------------*- Makefile -*--===#
-#
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-#
-#===------------------------------------------------------------------------===#
-
-OS=$(shell uname | tr '[A-Z]' '[a-z]')
-ROOT=$(shell pwd)
-MAKEFILE=Makefile.old  # this file.
-
-ifeq ($(ARCH), android)
-  ANDROID_CFLAGS= \
-		-DANDROID \
-		-D__WORDSIZE=32 \
-		-I$(ANDROID_BUILD_TOP)/external/stlport/stlport \
-		-I$(ANDROID_BUILD_TOP)/bionic \
-		-I$(ANDROID_BUILD_TOP)/bionic/libstdc++/include \
-		-I$(ANDROID_BUILD_TOP)/bionic/libc/arch-arm/include \
-		-I$(ANDROID_BUILD_TOP)/bionic/libc/include \
-		-I$(ANDROID_BUILD_TOP)/bionic/libc/kernel/common \
-		-I$(ANDROID_BUILD_TOP)/bionic/libc/kernel/arch-arm \
-		-I$(ANDROID_BUILD_TOP)/bionic/libm/include \
-		-I$(ANDROID_BUILD_TOP)/bionic/libm/include/arm \
-		-I$(ANDROID_BUILD_TOP)/bionic/libthread_db/include \
-		-L$(ANDROID_PRODUCT_OUT)/obj/lib
-  CLANG_FLAGS= \
-		-ccc-host-triple arm-linux-androideabi \
-		-D__compiler_offsetof=__builtin_offsetof \
-		-D__ELF__=1 \
-		-ccc-gcc-name arm-linux-androideabi-g++ \
-		$(ANDROID_CFLAGS)
-  CC=$(ANDROID_EABI_TOOLCHAIN)/arm-linux-androideabi-gcc $(ANDROID_CFLAGS)
-  CXX=$(ANDROID_EABI_TOOLCHAIN)/arm-linux-androideabi-g++ $(ANDROID_CFLAGS)
-endif
-
-ifeq ($(ARCH), arm)
-  # Example make command line:
-  # CROSSTOOL=$HOME/x-tools/arm-unknown-linux-gnueabi/ PATH=$CROSSTOOL/bin:$PATH make ARCH=arm asan_test
-  CLANG_FLAGS= \
-		-ccc-host-triple arm-unknown-linux-gnueabi \
-		-march=armv7-a -mfloat-abi=softfp -mfp=neon \
-		-ccc-gcc-name arm-unknown-linux-gnueabi-g++ \
-		-B$(CROSSTOOL)/lib/gcc/arm-unknown-linux-gnueabi/4.4.4 \
-		-B$(CROSSTOOL)/arm-unknown-linux-gnueabi/sys-root/usr/lib \
-		-I$(CROSSTOOL)/lib/gcc/arm-unknown-linux-gnueabi/4.4.4/include \
-		-I$(CROSSTOOL)/arm-unknown-linux-gnueabi/include/c++/4.4.4 \
-		-I$(CROSSTOOL)/arm-unknown-linux-gnueabi/include/c++/4.4.4/arm-unknown-linux-gnueabi \
-		-I$(CROSSTOOL)/arm-unknown-linux-gnueabi/sys-root/include \
-		-I$(CROSSTOOL)/arm-unknown-linux-gnueabi/sys-root/usr/include \
-		-L$(CROSSTOOL)/lib/gcc/arm-unknown-linux-gnueabi/4.4.4 \
-		-L$(CROSSTOOL)/arm-unknown-linux-gnueabi/sys-root/lib \
-		-L$(CROSSTOOL)/arm-unknown-linux-gnueabi/sys-root/usr/lib
-  CC=$(CROSSTOOL)/bin/arm-unknown-linux-gnueabi-gcc 
-  CXX=$(CROSSTOOL)/bin/arm-unknown-linux-gnueabi-g++
-endif
-
-CLANG_FLAGS=
-CLANG_VERSION=3.2
-CLANG_BUILD=$(ROOT)/../../../../build/Release+Asserts
-CLANG_CC=$(CLANG_BUILD)/bin/clang $(CLANG_FLAGS)
-CLANG_CXX=$(CLANG_BUILD)/bin/clang++ $(CLANG_FLAGS)
-FILE_CHECK=$(CLANG_BUILD)/bin/FileCheck
-
-CC=$(CLANG_CC)
-CXX=$(CLANG_CXX)
-
-CFLAGS:=-Wall -fvisibility=hidden
-
-CLEANROOM_CXX=$(CXX) -Wall
-
-INSTALL_DIR=../asan_clang_$(OS)
-BIN=bin_$(OS)
-
-LIBS=#-lpthread -ldl
-ARCH=x86_64
-
-ASAN_STACK=1
-ASAN_GLOBALS=1
-ASAN_SCALE=0  # default will be used
-ASAN_OFFSET=-1  #default will be used
-ASAN_UAR=0
-ASAN_HAS_EXCEPTIONS=1
-ASAN_FLEXIBLE_MAPPING_AND_OFFSET=0
-ASAN_HAS_BLACKLIST=1
-ASAN_NEEDS_SEGV=1
-ASAN_PIE=0
-
-ifeq ($(ARCH), i386)
-BITS=32
-SUFF=$(BITS)
-CFLAGS:=$(CFLAGS) -m$(BITS)
-endif
-
-ifeq ($(ARCH), x86_64)
-BITS=64
-SUFF=$(BITS)
-CFLAGS:=$(CFLAGS) -m$(BITS)
-endif
-
-ifeq ($(ARCH), arm)
-BITS=32
-SUFF=_arm
-CFLAGS:=$(CFLAGS) -march=armv7-a
-ASAN_HAS_EXCEPTIONS=0
-endif
-
-ifeq ($(ARCH), android)
-BITS=32
-SUFF=_android
-CFLAGS:=$(CFLAGS)
-ASAN_HAS_EXCEPTIONS=0
-endif
-
-PIE=
-ifeq ($(ASAN_PIE), 1)
-  PIE=-fPIE -pie
-endif
-
-# This will build libasan on linux for both x86_64 and i386 in the
-# desired location. The Mac library is already build by the clang's make.
-# $(CLANG_BUILD)/lib/clang/$(CLANG_VERSION)/lib/$(OS)/libclang_rt.asan-$(ARCH).a
-LIBASAN_INST_DIR=$(CLANG_BUILD)/lib/clang/$(CLANG_VERSION)/lib/$(OS)
-LIBASAN_A=$(LIBASAN_INST_DIR)/libclang_rt.asan-$(ARCH).a
-
-BLACKLIST=
-ifeq ($(ASAN_HAS_BLACKLIST), 1)
-  BLACKLIST=-mllvm -asan-blacklist=$(ROOT)/tests/asan_test.ignore
-endif
-
-COMMON_ASAN_DEFINES=\
-                -DASAN_UAR=$(ASAN_UAR) \
-		-DASAN_HAS_EXCEPTIONS=$(ASAN_HAS_EXCEPTIONS) \
-		-DASAN_NEEDS_SEGV=$(ASAN_NEEDS_SEGV) \
-		-DASAN_HAS_BLACKLIST=$(ASAN_HAS_BLACKLIST)
-
-CLANG_ASAN_CXX=$(CLANG_CXX) \
-	       -faddress-sanitizer \
-		$(BLACKLIST)  \
-		-mllvm -asan-stack=$(ASAN_STACK)      \
-		-mllvm -asan-globals=$(ASAN_GLOBALS)  \
-		-mllvm -asan-mapping-scale=$(ASAN_SCALE) \
-		-mllvm -asan-mapping-offset-log=$(ASAN_OFFSET) \
-		-mllvm -asan-use-after-return=$(ASAN_UAR) \
-		$(COMMON_ASAN_DEFINES)
-
-CLANG_ASAN_LD=$(CLANG_CXX) -faddress-sanitizer
-
-GCC_ASAN_PATH=SET_FROM_COMMAND_LINE
-GCC_ASAN_CXX=$(GCC_ASAN_PATH)/g++ \
-	     -faddress-sanitizer \
-	     $(COMMON_ASAN_DEFINES)
-
-GCC_ASAN_LD=$(GCC_ASAN_PATH)/g++ -ldl -lpthread
-
-ASAN_COMPILER=clang
-
-ifeq ($(ASAN_COMPILER), clang)
-  ASAN_CXX=$(CLANG_ASAN_CXX)
-  ASAN_LD=$(CLANG_ASAN_LD)
-  ASAN_LD_TAIL=
-endif
-
-ifeq ($(ASAN_COMPILER), gcc)
-  ASAN_CXX=$(GCC_ASAN_CXX)
-  ASAN_LD=$(GCC_ASAN_LD)
-  ASAN_LD_TAIL=$(LIBASAN_A)
-endif
-
-INTERCEPTION=../interception
-MACH_OVERRIDE=$(INTERCEPTION)/mach_override
-COMMON=../sanitizer_common
-
-RTL_HDR=$(wildcard *.h) \
-	$(wildcard $(INTERCEPTION)/*.h) \
-	$(wildcard $(MACH_OVERRIDE)/*.h) \
-	$(wildcard $(COMMON)/*.h)
-
-LIBTSAN_SRC=$(wildcard *.cc)
-INTERCEPTION_SRC=$(wildcard $(INTERCEPTION)/*.cc)
-MACH_OVERRIDE_SRC=$(wildcard $(MACH_OVERRIDE)/*.c)
-COMMON_SRC=$(wildcard $(COMMON)/*.cc)
-
-
-LIBASAN_OBJ=$(patsubst %.cc,$(BIN)/%$(SUFF).o,$(LIBTSAN_SRC)) \
-	    $(patsubst $(INTERCEPTION)/%.cc,$(BIN)/%$(SUFF).o,$(INTERCEPTION_SRC)) \
-	    $(patsubst $(COMMON)/%.cc,$(BIN)/%$(SUFF).o,$(COMMON_SRC)) \
-	    $(patsubst $(MACH_OVERRIDE)/%.c,$(BIN)/%$(SUFF).o,$(MACH_OVERRIDE_SRC))
-
-GTEST_ROOT=third_party/googletest
-GTEST_INCLUDE=-I$(GTEST_ROOT)/include
-GTEST_MAKE_DIR=$(GTEST_ROOT)/make-$(OS)$(SUFF)
-GTEST_LIB=$(GTEST_MAKE_DIR)/gtest-all.o
-
-all: b64 b32
-
-test: t64 t32 output_tests lint
-	@echo "ALL TESTS PASSED"
-
-output_tests: b32 b64
-	cd output_tests && ./test_output.sh $(CLANG_CXX) $(CLANG_CC) $(FILE_CHECK)
-
-t64: b64
-	$(BIN)/asan_test64
-t32: b32
-	$(BIN)/asan_test32
-
-b64: | mk_bin_dir
-	$(MAKE) -f $(MAKEFILE) ARCH=x86_64 asan_test asan_benchmarks
-b32: | mk_bin_dir
-	$(MAKE) -f $(MAKEFILE) ARCH=i386 asan_test asan_benchmarks
-
-lib64:
-	$(MAKE) -f $(MAKEFILE) ARCH=x86_64 lib
-lib32:
-	$(MAKE) -f $(MAKEFILE) ARCH=i386 lib
-
-mk_bin_dir:
-	mkdir -p $(BIN)
-
-clang:
-	cd ../ && llvm/rebuild_clang_and_asan.sh > /dev/null
-
-install: install_clang
-
-$(INSTALL_DIR):
-	mkdir -p $(INSTALL_DIR) $(INSTALL_DIR)/bin $(INSTALL_DIR)/lib
-
-install_clang: | $(INSTALL_DIR)
-	cp -v $(CLANG_BUILD)/bin/clang $(INSTALL_DIR)/bin
-	cp -rv $(CLANG_BUILD)/lib/clang $(INSTALL_DIR)/lib
-	(cd $(INSTALL_DIR)/bin; ln -sf clang clang++)
-
-#install_lib: | $(INSTALL_DIR)
-#	cp -v $(CLANG_BUILD)/lib/libasan*.a $(INSTALL_DIR)/lib
-
-$(BIN)/asan_noinst_test$(SUFF).o: tests/asan_noinst_test.cc $(RTL_HDR) $(MAKEFILE)
-	$(CLEANROOM_CXX) $(PIE) $(CFLAGS) $(GTEST_INCLUDE) -I. -I.. -g -c $< -O2 -o $@
-
-$(BIN)/asan_break_optimization$(SUFF).o: tests/asan_break_optimization.cc $(MAKEFILE)
-	$(CLEANROOM_CXX) $(PIE) $(CFLAGS) -c $< -O0 -o $@
-
-$(BIN)/%_test$(SUFF).o: tests/%_test.cc $(RTL_HDR) $(MAKEFILE)
-	$(ASAN_CXX) $(GTEST_INCLUDE) -I. -I.. -g -c $< -O2 -o $@ $(PIE) $(CFLAGS)
-
-$(BIN)/%_test$(SUFF).o: tests/%_test.mm $(RTL_HDR) $(MAKEFILE)
-	$(ASAN_CXX) $(GTEST_INCLUDE) -I. -I.. -g -c $< -O2 -o $@ -ObjC $(PIE) $(CFLAGS)
-
-RTL_COMMON_FLAGS=$(PIE) $(CFLAGS) -fPIC -c -O2 -fno-exceptions -funwind-tables \
-	   -Ithird_party -I.. $(ASAN_FLAGS)
-
-$(BIN)/%$(SUFF).o: $(INTERCEPTION)/%.cc $(RTL_HDR) $(MAKEFILE)
-	$(CXX) $(RTL_COMMON_FLAGS) -o $@ -g $<
-
-$(BIN)/%$(SUFF).o: $(COMMON)/%.cc $(RTL_HDR) $(MAKEFILE)
-	$(CXX) $(RTL_COMMON_FLAGS) -o $@ -g $<
-
-$(BIN)/%$(SUFF).o: $(MACH_OVERRIDE)/%.c $(RTL_HDR) $(MAKEFILE)
-	$(CC) $(RTL_COMMON_FLAGS) -o $@ -g $<
-
-$(BIN)/%$(SUFF).o: %.cc $(RTL_HDR) $(MAKEFILE)
-	$(CXX) $(RTL_COMMON_FLAGS) -o $@ -g $<  \
-		-DASAN_NEEDS_SEGV=$(ASAN_NEEDS_SEGV) \
-		-DASAN_HAS_EXCEPTIONS=$(ASAN_HAS_EXCEPTIONS) \
-		-DASAN_FLEXIBLE_MAPPING_AND_OFFSET=$(ASAN_FLEXIBLE_MAPPING_AND_OFFSET)
-
-$(BIN)/%$(SUFF).o: %.c $(RTL_HDR) $(MAKEFILE)
-	$(CC) $(PIE) $(CFLAGS) -fPIC -c -O2 -o $@ -g $< -Ithird_party \
-		$(ASAN_FLAGS)
-
-ifeq ($(OS),darwin)
-LD_FLAGS=-framework Foundation
-else
-LD_FLAGS=
-endif
-
-lib: $(LIBASAN_A)
-
-$(LIBASAN_A): mk_bin_dir $(LIBASAN_OBJ) $(MAKEFILE)
-	mkdir -p $(LIBASAN_INST_DIR)
-	ar ru $@ $(LIBASAN_OBJ)
-	$(CXX) -shared $(CFLAGS) $(LIBASAN_OBJ) $(LD_FLAGS) -o $(BIN)/libasan$(SUFF).so
-
-TEST_OBJECTS_COMMON=\
-	     $(BIN)/asan_globals_test$(SUFF).o \
-	     $(BIN)/asan_break_optimization$(SUFF).o \
-	     $(BIN)/asan_noinst_test$(SUFF).o \
-	     $(BIN)/asan_test$(SUFF).o
-
-BENCHMARK_OBJECTS=\
-	     $(BIN)/asan_benchmarks_test$(SUFF).o \
-	     $(BIN)/asan_break_optimization$(SUFF).o
-
-ifeq ($(OS),darwin)
-TEST_OBJECTS=$(TEST_OBJECTS_COMMON) \
-	     $(BIN)/asan_mac_test$(SUFF).o
-else
-TEST_OBJECTS=$(TEST_OBJECTS_COMMON)
-endif
-
-$(BIN)/asan_test$(SUFF): $(TEST_OBJECTS) $(LIBASAN_A) $(MAKEFILE) tests/asan_test.ignore $(GTEST_LIB)
-	$(ASAN_LD) $(PIE) $(CFLAGS) -g -O3 $(TEST_OBJECTS) \
-		$(LD_FLAGS) -o $@ $(LIBS) $(GTEST_LIB) $(ASAN_LD_TAIL)
-
-$(BIN)/asan_benchmarks$(SUFF): $(BENCHMARK_OBJECTS) $(LIBASAN_A) $(MAKEFILE) $(GTEST_LIB)
-	$(ASAN_LD) $(PIE) $(CFLAGS) -g -O3 $(BENCHMARK_OBJECTS) \
-		$(LD_FLAGS) -o $@ $(LIBS) $(GTEST_LIB) $(ASAN_LD_TAIL)
-
-asan_test: $(BIN)/asan_test$(SUFF)
-
-asan_benchmarks: $(BIN)/asan_benchmarks$(SUFF)
-
-# for now, build gtest with clang/asan even if we use a different compiler.
-$(GTEST_LIB):
-	mkdir -p $(GTEST_MAKE_DIR) && \
-	cd $(GTEST_MAKE_DIR) && \
-	$(MAKE) -f ../make/Makefile CXXFLAGS="$(PIE) $(CFLAGS) -g -w" \
-	  CXX="$(CLANG_CXX)"
-
-RTL_LINT_FILTER=-readability/casting,-readability/check,-build/include,-build/header_guard,-build/class,-legal/copyright,-build/namespaces
-# TODO(kcc): remove these filters one by one
-TEST_LINT_FILTER=-readability/casting,-build/include,-legal/copyright,-whitespace/newline,-runtime/sizeof,-runtime/int,-runtime/printf
-
-LLVM_LINT_FILTER=-,+whitespace
-
-ADDRESS_SANITIZER_CPP=../../../../lib/Transforms/Instrumentation/AddressSanitizer.cpp
-
-lint:
-	third_party/cpplint/cpplint.py --filter=$(LLVM_LINT_FILTER) $(ADDRESS_SANITIZER_CPP)
-	third_party/cpplint/cpplint.py --filter=$(RTL_LINT_FILTER) asan_*.cc asan_*.h
-	third_party/cpplint/cpplint.py --filter=$(RTL_LINT_FILTER) $(INTERCEPTION)/interception*.h $(INTERCEPTION)/interception*.cc
-	third_party/cpplint/cpplint.py --filter=$(RTL_LINT_FILTER) $(COMMON)/sanitizer_*.h $(COMMON)/sanitizer_*.cc
-	third_party/cpplint/cpplint.py --filter=$(TEST_LINT_FILTER) tests/*.cc output_tests/*.cc
-
-get_third_party:
-	rm -rf third_party
-	mkdir third_party
-	(cd third_party && \
-	svn co -r375        http://googletest.googlecode.com/svn/trunk googletest && \
-	svn co -r69 http://google-styleguide.googlecode.com/svn/trunk/cpplint cpplint \
-	)
-
-clean:
-	rm -f *.o *.ll *.S *.a *.log asan_test64* asan_test32*  a.out perf.data log
-	rm -f $(LIBASAN_INST_DIR)/libclang_rt.asan-*.a
-	rm -rf $(BIN)
-	rm -rf $(GTEST_ROOT)/make-*
diff --git a/lib/asan/README.txt b/lib/asan/README.txt
index 5e6600489a69..e4f4961c5d4f 100644
--- a/lib/asan/README.txt
+++ b/lib/asan/README.txt
@@ -4,22 +4,26 @@ This directory contains sources of the AddressSanitizer (asan) run-time library.
 We are in the process of integrating AddressSanitizer with LLVM, stay tuned.
 
 Directory structre:
-
 README.txt       : This file.
-Makefile.mk      : Currently a stub for a proper makefile. not usable.
-Makefile.old     : Old out-of-tree makefile, the only usable one so far.
+Makefile.mk      : File for make-based build.
+CMakeLists.txt   : File for cmake-based build.
 asan_*.{cc,h}    : Sources of the asan run-time lirbary.
-mach_override/*  : Utility to override functions on Darwin (MIT License).
 scripts/*        : Helper scripts.
+tests/*          : ASan unit tests.
+lit_tests/*      : ASan output tests.
 
-Temporary build instructions (verified on linux):
+Also ASan runtime needs the following libraries:
+lib/interception/      : Machinery used to intercept function calls.
+lib/sanitizer_common/  : Code shared between ASan and TSan.
 
-cd lib/asan
-make -f Makefile.old get_third_party  # gets googletest and cpplint
-make -f Makefile.old test -j 8 CLANG_BUILD=/path/to/Release+Asserts
-# Optional:
-# make -f Makefile.old install # installs clang and rt to lib/asan_clang_linux
+Currently ASan runtime can be built by both make and cmake build systems.
+(see compiler-rt/make and files Makefile.mk for make-based build and
+files CMakeLists.txt for cmake-based build).
 
-For more info see http://code.google.com/p/address-sanitizer/
+ASan unit and output tests work only with cmake. You may run this
+command from the root of your cmake build tree:
 
+make check-asan
 
+For more instructions see:
+http://code.google.com/p/address-sanitizer/wiki/HowToBuild
diff --git a/lib/asan/asan_allocator.cc b/lib/asan/asan_allocator.cc
index 352cce00fbee..30dd4ceddd88 100644
--- a/lib/asan/asan_allocator.cc
+++ b/lib/asan/asan_allocator.cc
@@ -24,21 +24,19 @@
 // Once freed, the body of the chunk contains the stack trace of the free call.
 //
 //===----------------------------------------------------------------------===//
-
 #include "asan_allocator.h"
+
+#if ASAN_ALLOCATOR_VERSION == 1
 #include "asan_interceptors.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_mapping.h"
 #include "asan_stats.h"
+#include "asan_report.h"
 #include "asan_thread.h"
 #include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
 #include "sanitizer_common/sanitizer_atomic.h"
-
-#if defined(_WIN32) && !defined(__clang__)
-#include <intrin.h>
-#endif
+#include "sanitizer_common/sanitizer_mutex.h"
 
 namespace __asan {
 
@@ -57,43 +55,7 @@ static const uptr kMallocSizeClassStepLog = 26;
 static const uptr kMallocSizeClassStep = 1UL << kMallocSizeClassStepLog;
 
 static const uptr kMaxAllowedMallocSize =
-    (__WORDSIZE == 32) ? 3UL << 30 : 8UL << 30;
-
-static inline bool IsAligned(uptr a, uptr alignment) {
-  return (a & (alignment - 1)) == 0;
-}
-
-static inline uptr Log2(uptr x) {
-  CHECK(IsPowerOfTwo(x));
-#if !defined(_WIN32) || defined(__clang__)
-  return __builtin_ctzl(x);
-#elif defined(_WIN64)
-  unsigned long ret;  // NOLINT
-  _BitScanForward64(&ret, x);
-  return ret;
-#else
-  unsigned long ret;  // NOLINT
-  _BitScanForward(&ret, x);
-  return ret;
-#endif
-}
-
-static inline uptr RoundUpToPowerOfTwo(uptr size) {
-  CHECK(size);
-  if (IsPowerOfTwo(size)) return size;
-
-  unsigned long up;  // NOLINT
-#if !defined(_WIN32) || defined(__clang__)
-  up = __WORDSIZE - 1 - __builtin_clzl(size);
-#elif defined(_WIN64)
-  _BitScanReverse64(&up, size);
-#else
-  _BitScanReverse(&up, size);
-#endif
-  CHECK(size < (1ULL << (up + 1)));
-  CHECK(size > (1ULL << up));
-  return 1UL << (up + 1);
-}
+    (SANITIZER_WORDSIZE == 32) ? 3UL << 30 : 8UL << 30;
 
 static inline uptr SizeClassToSize(u8 size_class) {
   CHECK(size_class < kNumberOfSizeClasses);
@@ -131,7 +93,7 @@ static void PoisonHeapPartialRightRedzone(uptr mem, uptr size) {
 }
 
 static u8 *MmapNewPagesAndPoisonShadow(uptr size) {
-  CHECK(IsAligned(size, kPageSize));
+  CHECK(IsAligned(size, GetPageSizeCached()));
   u8 *res = (u8*)MmapOrDie(size, __FUNCTION__);
   PoisonShadow((uptr)res, size, kAsanHeapLeftRedzoneMagic);
   if (flags()->debug) {
@@ -166,7 +128,8 @@ struct ChunkBase {
 
   // Second 8 bytes.
   uptr alignment_log : 8;
-  uptr used_size : FIRST_32_SECOND_64(32, 56);  // Size requested by the user.
+  uptr alloc_type    : 2;
+  uptr used_size : FIRST_32_SECOND_64(32, 54);  // Size requested by the user.
 
   // This field may overlap with the user area and thus should not
   // be used while the chunk is in CHUNK_ALLOCATED state.
@@ -198,50 +161,23 @@ struct AsanChunk: public ChunkBase {
     if (REDZONE < sizeof(ChunkBase)) return 0;
     return (REDZONE) / sizeof(u32);
   }
+};
 
-  bool AddrIsInside(uptr addr, uptr access_size, uptr *offset) {
-    if (addr >= Beg() && (addr + access_size) <= (Beg() + used_size)) {
-      *offset = addr - Beg();
-      return true;
-    }
-    return false;
-  }
-
-  bool AddrIsAtLeft(uptr addr, uptr access_size, uptr *offset) {
-    if (addr < Beg()) {
-      *offset = Beg() - addr;
-      return true;
-    }
-    return false;
-  }
+uptr AsanChunkView::Beg() { return chunk_->Beg(); }
+uptr AsanChunkView::End() { return Beg() + UsedSize(); }
+uptr AsanChunkView::UsedSize() { return chunk_->used_size; }
+uptr AsanChunkView::AllocTid() { return chunk_->alloc_tid; }
+uptr AsanChunkView::FreeTid() { return chunk_->free_tid; }
 
-  bool AddrIsAtRight(uptr addr, uptr access_size, uptr *offset) {
-    if (addr + access_size >= Beg() + used_size) {
-      if (addr <= Beg() + used_size)
-        *offset = 0;
-      else
-        *offset = addr - (Beg() + used_size);
-      return true;
-    }
-    return false;
-  }
+void AsanChunkView::GetAllocStack(StackTrace *stack) {
+  StackTrace::UncompressStack(stack, chunk_->compressed_alloc_stack(),
+                              chunk_->compressed_alloc_stack_size());
+}
 
-  void DescribeAddress(uptr addr, uptr access_size) {
-    uptr offset;
-    AsanPrintf("%p is located ", (void*)addr);
-    if (AddrIsInside(addr, access_size, &offset)) {
-      AsanPrintf("%zu bytes inside of", offset);
-    } else if (AddrIsAtLeft(addr, access_size, &offset)) {
-      AsanPrintf("%zu bytes to the left of", offset);
-    } else if (AddrIsAtRight(addr, access_size, &offset)) {
-      AsanPrintf("%zu bytes to the right of", offset);
-    } else {
-      AsanPrintf(" somewhere around (this is AddressSanitizer bug!)");
-    }
-    AsanPrintf(" %zu-byte region [%p,%p)\n",
-               used_size, (void*)Beg(), (void*)(Beg() + used_size));
-  }
-};
+void AsanChunkView::GetFreeStack(StackTrace *stack) {
+  StackTrace::UncompressStack(stack, chunk_->compressed_free_stack(),
+                              chunk_->compressed_free_stack_size());
+}
 
 static AsanChunk *PtrToChunk(uptr ptr) {
   AsanChunk *m = (AsanChunk*)(ptr - REDZONE);
@@ -251,37 +187,15 @@ static AsanChunk *PtrToChunk(uptr ptr) {
   return m;
 }
 
-
 void AsanChunkFifoList::PushList(AsanChunkFifoList *q) {
   CHECK(q->size() > 0);
-  if (last_) {
-    CHECK(first_);
-    CHECK(!last_->next);
-    last_->next = q->first_;
-    last_ = q->last_;
-  } else {
-    CHECK(!first_);
-    last_ = q->last_;
-    first_ = q->first_;
-    CHECK(first_);
-  }
-  CHECK(last_);
-  CHECK(!last_->next);
   size_ += q->size();
+  append_back(q);
   q->clear();
 }
 
 void AsanChunkFifoList::Push(AsanChunk *n) {
-  CHECK(n->next == 0);
-  if (last_) {
-    CHECK(first_);
-    CHECK(!last_->next);
-    last_->next = n;
-    last_ = n;
-  } else {
-    CHECK(!first_);
-    last_ = first_ = n;
-  }
+  push_back(n);
   size_ += n->Size();
 }
 
@@ -290,15 +204,9 @@ void AsanChunkFifoList::Push(AsanChunk *n) {
 // ago. Not sure if we can or want to do anything with this.
 AsanChunk *AsanChunkFifoList::Pop() {
   CHECK(first_);
-  AsanChunk *res = first_;
-  first_ = first_->next;
-  if (first_ == 0)
-    last_ = 0;
-  CHECK(size_ >= res->Size());
+  AsanChunk *res = front();
   size_ -= res->Size();
-  if (last_) {
-    CHECK(!last_->next);
-  }
+  pop_front();
   return res;
 }
 
@@ -315,14 +223,13 @@ struct PageGroup {
 
 class MallocInfo {
  public:
-
   explicit MallocInfo(LinkerInitialized x) : mu_(x) { }
 
   AsanChunk *AllocateChunks(u8 size_class, uptr n_chunks) {
     AsanChunk *m = 0;
     AsanChunk **fl = &free_lists_[size_class];
     {
-      ScopedLock lock(&mu_);
+      BlockingMutexLock lock(&mu_);
       for (uptr i = 0; i < n_chunks; i++) {
         if (!(*fl)) {
           *fl = GetNewChunks(size_class);
@@ -340,7 +247,7 @@ class MallocInfo {
   void SwallowThreadLocalMallocStorage(AsanThreadLocalMallocStorage *x,
                                        bool eat_free_lists) {
     CHECK(flags()->quarantine_size > 0);
-    ScopedLock lock(&mu_);
+    BlockingMutexLock lock(&mu_);
     AsanChunkFifoList *q = &x->quarantine_;
     if (q->size() > 0) {
       quarantine_.PushList(q);
@@ -364,23 +271,24 @@ class MallocInfo {
   }
 
   void BypassThreadLocalQuarantine(AsanChunk *chunk) {
-    ScopedLock lock(&mu_);
+    BlockingMutexLock lock(&mu_);
     quarantine_.Push(chunk);
   }
 
-  AsanChunk *FindMallocedOrFreed(uptr addr, uptr access_size) {
-    ScopedLock lock(&mu_);
-    return FindChunkByAddr(addr);
+  AsanChunk *FindChunkByAddr(uptr addr) {
+    BlockingMutexLock lock(&mu_);
+    return FindChunkByAddrUnlocked(addr);
   }
 
   uptr AllocationSize(uptr ptr) {
     if (!ptr) return 0;
-    ScopedLock lock(&mu_);
+    BlockingMutexLock lock(&mu_);
+
+    // Make sure this is our chunk and |ptr| actually points to the beginning
+    // of the allocated memory.
+    AsanChunk *m = FindChunkByAddrUnlocked(ptr);
+    if (!m || m->Beg() != ptr) return 0;
 
-    // first, check if this is our memory
-    PageGroup *g = FindPageGroupUnlocked(ptr);
-    if (!g) return 0;
-    AsanChunk *m = PtrToChunk(ptr);
     if (m->chunk_state == CHUNK_ALLOCATED) {
       return m->used_size;
     } else {
@@ -397,7 +305,7 @@ class MallocInfo {
   }
 
   void PrintStatus() {
-    ScopedLock lock(&mu_);
+    BlockingMutexLock lock(&mu_);
     uptr malloced = 0;
 
     Printf(" MallocInfo: in quarantine: %zu malloced: %zu; ",
@@ -415,7 +323,7 @@ class MallocInfo {
   }
 
   PageGroup *FindPageGroup(uptr addr) {
-    ScopedLock lock(&mu_);
+    BlockingMutexLock lock(&mu_);
     return FindPageGroupUnlocked(addr);
   }
 
@@ -462,14 +370,14 @@ class MallocInfo {
       return left_chunk;
     // Choose based on offset.
     uptr l_offset = 0, r_offset = 0;
-    CHECK(left_chunk->AddrIsAtRight(addr, 1, &l_offset));
-    CHECK(right_chunk->AddrIsAtLeft(addr, 1, &r_offset));
+    CHECK(AsanChunkView(left_chunk).AddrIsAtRight(addr, 1, &l_offset));
+    CHECK(AsanChunkView(right_chunk).AddrIsAtLeft(addr, 1, &r_offset));
     if (l_offset < r_offset)
       return left_chunk;
     return right_chunk;
   }
 
-  AsanChunk *FindChunkByAddr(uptr addr) {
+  AsanChunk *FindChunkByAddrUnlocked(uptr addr) {
     PageGroup *g = FindPageGroupUnlocked(addr);
     if (!g) return 0;
     CHECK(g->size_of_chunk);
@@ -482,17 +390,18 @@ class MallocInfo {
           m->chunk_state == CHUNK_AVAILABLE ||
           m->chunk_state == CHUNK_QUARANTINE);
     uptr offset = 0;
-    if (m->AddrIsInside(addr, 1, &offset))
+    AsanChunkView m_view(m);
+    if (m_view.AddrIsInside(addr, 1, &offset))
       return m;
 
-    if (m->AddrIsAtRight(addr, 1, &offset)) {
+    if (m_view.AddrIsAtRight(addr, 1, &offset)) {
       if (this_chunk_addr == g->last_chunk)  // rightmost chunk
         return m;
       uptr right_chunk_addr = this_chunk_addr + g->size_of_chunk;
       CHECK(g->InRange(right_chunk_addr));
       return ChooseChunk(addr, m, (AsanChunk*)right_chunk_addr);
     } else {
-      CHECK(m->AddrIsAtLeft(addr, 1, &offset));
+      CHECK(m_view.AddrIsAtLeft(addr, 1, &offset));
       if (this_chunk_addr == g->beg)  // leftmost chunk
         return m;
       uptr left_chunk_addr = this_chunk_addr - g->size_of_chunk;
@@ -533,12 +442,13 @@ class MallocInfo {
     uptr mmap_size = Max(size, kMinMmapSize);
     uptr n_chunks = mmap_size / size;
     CHECK(n_chunks * size == mmap_size);
-    if (size < kPageSize) {
+    uptr PageSize = GetPageSizeCached();
+    if (size < PageSize) {
       // Size is small, just poison the last chunk.
       n_chunks--;
     } else {
       // Size is large, allocate an extra page at right and poison it.
-      mmap_size += kPageSize;
+      mmap_size += PageSize;
     }
     CHECK(n_chunks > 0);
     u8 *mem = MmapNewPagesAndPoisonShadow(mmap_size);
@@ -564,14 +474,14 @@ class MallocInfo {
     pg->size_of_chunk = size;
     pg->last_chunk = (uptr)(mem + size * (n_chunks - 1));
     int idx = atomic_fetch_add(&n_page_groups_, 1, memory_order_relaxed);
-    CHECK(idx < (int)ASAN_ARRAY_SIZE(page_groups_));
+    CHECK(idx < (int)ARRAY_SIZE(page_groups_));
     page_groups_[idx] = pg;
     return res;
   }
 
   AsanChunk *free_lists_[kNumberOfSizeClasses];
   AsanChunkFifoList quarantine_;
-  AsanLock mu_;
+  BlockingMutex mu_;
 
   PageGroup *page_groups_[kMaxAvailableRam / kMinMmapSize];
   atomic_uint32_t n_page_groups_;
@@ -584,42 +494,12 @@ void AsanThreadLocalMallocStorage::CommitBack() {
   malloc_info.SwallowThreadLocalMallocStorage(this, true);
 }
 
-static void Describe(uptr addr, uptr access_size) {
-  AsanChunk *m = malloc_info.FindMallocedOrFreed(addr, access_size);
-  if (!m) return;
-  m->DescribeAddress(addr, access_size);
-  CHECK(m->alloc_tid >= 0);
-  AsanThreadSummary *alloc_thread =
-      asanThreadRegistry().FindByTid(m->alloc_tid);
-  AsanStackTrace alloc_stack;
-  AsanStackTrace::UncompressStack(&alloc_stack, m->compressed_alloc_stack(),
-                                  m->compressed_alloc_stack_size());
-  AsanThread *t = asanThreadRegistry().GetCurrent();
-  CHECK(t);
-  if (m->free_tid != kInvalidTid) {
-    AsanThreadSummary *free_thread =
-        asanThreadRegistry().FindByTid(m->free_tid);
-    AsanPrintf("freed by thread T%d here:\n", free_thread->tid());
-    AsanStackTrace free_stack;
-    AsanStackTrace::UncompressStack(&free_stack, m->compressed_free_stack(),
-                                    m->compressed_free_stack_size());
-    free_stack.PrintStack();
-    AsanPrintf("previously allocated by thread T%d here:\n",
-               alloc_thread->tid());
-
-    alloc_stack.PrintStack();
-    t->summary()->Announce();
-    free_thread->Announce();
-    alloc_thread->Announce();
-  } else {
-    AsanPrintf("allocated by thread T%d here:\n", alloc_thread->tid());
-    alloc_stack.PrintStack();
-    t->summary()->Announce();
-    alloc_thread->Announce();
-  }
+AsanChunkView FindHeapChunkByAddress(uptr address) {
+  return AsanChunkView(malloc_info.FindChunkByAddr(address));
 }
 
-static u8 *Allocate(uptr alignment, uptr size, AsanStackTrace *stack) {
+static u8 *Allocate(uptr alignment, uptr size, StackTrace *stack,
+                    AllocType alloc_type) {
   __asan_init();
   CHECK(stack);
   if (size == 0) {
@@ -676,6 +556,7 @@ static u8 *Allocate(uptr alignment, uptr size, AsanStackTrace *stack) {
   CHECK(m);
   CHECK(m->chunk_state == CHUNK_AVAILABLE);
   m->chunk_state = CHUNK_ALLOCATED;
+  m->alloc_type = alloc_type;
   m->next = 0;
   CHECK(m->Size() == size_to_allocate);
   uptr addr = (uptr)m + REDZONE;
@@ -697,7 +578,7 @@ static u8 *Allocate(uptr alignment, uptr size, AsanStackTrace *stack) {
   CHECK(m->Beg() == addr);
   m->alloc_tid = t ? t->tid() : 0;
   m->free_tid   = kInvalidTid;
-  AsanStackTrace::CompressStack(stack, m->compressed_alloc_stack(),
+  StackTrace::CompressStack(stack, m->compressed_alloc_stack(),
                                 m->compressed_alloc_stack_size());
   PoisonShadow(addr, rounded_size, 0);
   if (size < rounded_size) {
@@ -710,7 +591,7 @@ static u8 *Allocate(uptr alignment, uptr size, AsanStackTrace *stack) {
   return (u8*)addr;
 }
 
-static void Deallocate(u8 *ptr, AsanStackTrace *stack) {
+static void Deallocate(u8 *ptr, StackTrace *stack, AllocType alloc_type) {
   if (!ptr) return;
   CHECK(stack);
 
@@ -726,24 +607,21 @@ static void Deallocate(u8 *ptr, AsanStackTrace *stack) {
                                        memory_order_acq_rel);
 
   if (old_chunk_state == CHUNK_QUARANTINE) {
-    AsanReport("ERROR: AddressSanitizer attempting double-free on %p:\n", ptr);
-    stack->PrintStack();
-    Describe((uptr)ptr, 1);
-    ShowStatsAndAbort();
+    ReportDoubleFree((uptr)ptr, stack);
   } else if (old_chunk_state != CHUNK_ALLOCATED) {
-    AsanReport("ERROR: AddressSanitizer attempting free on address "
-               "which was not malloc()-ed: %p\n", ptr);
-    stack->PrintStack();
-    ShowStatsAndAbort();
+    ReportFreeNotMalloced((uptr)ptr, stack);
   }
   CHECK(old_chunk_state == CHUNK_ALLOCATED);
+  if (m->alloc_type != alloc_type && flags()->alloc_dealloc_mismatch)
+    ReportAllocTypeMismatch((uptr)ptr, stack,
+                            (AllocType)m->alloc_type, (AllocType)alloc_type);
   // With REDZONE==16 m->next is in the user area, otherwise it should be 0.
   CHECK(REDZONE <= 16 || !m->next);
   CHECK(m->free_tid == kInvalidTid);
   CHECK(m->alloc_tid >= 0);
   AsanThread *t = asanThreadRegistry().GetCurrent();
   m->free_tid = t ? t->tid() : 0;
-  AsanStackTrace::CompressStack(stack, m->compressed_free_stack(),
+  StackTrace::CompressStack(stack, m->compressed_free_stack(),
                                 m->compressed_free_stack_size());
   uptr rounded_size = RoundUpTo(m->used_size, REDZONE);
   PoisonShadow((uptr)ptr, rounded_size, kAsanHeapFreeMagic);
@@ -769,7 +647,7 @@ static void Deallocate(u8 *ptr, AsanStackTrace *stack) {
 }
 
 static u8 *Reallocate(u8 *old_ptr, uptr new_size,
-                           AsanStackTrace *stack) {
+                           StackTrace *stack) {
   CHECK(old_ptr && new_size);
 
   // Statistics.
@@ -781,114 +659,112 @@ static u8 *Reallocate(u8 *old_ptr, uptr new_size,
   CHECK(m->chunk_state == CHUNK_ALLOCATED);
   uptr old_size = m->used_size;
   uptr memcpy_size = Min(new_size, old_size);
-  u8 *new_ptr = Allocate(0, new_size, stack);
+  u8 *new_ptr = Allocate(0, new_size, stack, FROM_MALLOC);
   if (new_ptr) {
     CHECK(REAL(memcpy) != 0);
     REAL(memcpy)(new_ptr, old_ptr, memcpy_size);
-    Deallocate(old_ptr, stack);
+    Deallocate(old_ptr, stack, FROM_MALLOC);
   }
   return new_ptr;
 }
 
 }  // namespace __asan
 
-// Malloc hooks declaration.
-// ASAN_NEW_HOOK(ptr, size) is called immediately after
-//   allocation of "size" bytes, which returned "ptr".
-// ASAN_DELETE_HOOK(ptr) is called immediately before
-//   deallocation of "ptr".
-// If ASAN_NEW_HOOK or ASAN_DELETE_HOOK is defined, user
-// program must provide implementation of this hook.
-// If macro is undefined, the hook is no-op.
-#ifdef ASAN_NEW_HOOK
-extern "C" void ASAN_NEW_HOOK(void *ptr, uptr size);
-#else
-static inline void ASAN_NEW_HOOK(void *ptr, uptr size) { }
-#endif
-
-#ifdef ASAN_DELETE_HOOK
-extern "C" void ASAN_DELETE_HOOK(void *ptr);
-#else
-static inline void ASAN_DELETE_HOOK(void *ptr) { }
+#if !SANITIZER_SUPPORTS_WEAK_HOOKS
+// Provide default (no-op) implementation of malloc hooks.
+extern "C" {
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
+void __asan_malloc_hook(void *ptr, uptr size) {
+  (void)ptr;
+  (void)size;
+}
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
+void __asan_free_hook(void *ptr) {
+  (void)ptr;
+}
+}  // extern "C"
 #endif
 
 namespace __asan {
 
-void *asan_memalign(uptr alignment, uptr size, AsanStackTrace *stack) {
-  void *ptr = (void*)Allocate(alignment, size, stack);
-  ASAN_NEW_HOOK(ptr, size);
+void PrintInternalAllocatorStats() {
+}
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void *asan_memalign(uptr alignment, uptr size, StackTrace *stack,
+                    AllocType alloc_type) {
+  void *ptr = (void*)Allocate(alignment, size, stack, alloc_type);
+  ASAN_MALLOC_HOOK(ptr, size);
   return ptr;
 }
 
-void asan_free(void *ptr, AsanStackTrace *stack) {
-  ASAN_DELETE_HOOK(ptr);
-  Deallocate((u8*)ptr, stack);
+SANITIZER_INTERFACE_ATTRIBUTE
+void asan_free(void *ptr, StackTrace *stack, AllocType alloc_type) {
+  ASAN_FREE_HOOK(ptr);
+  Deallocate((u8*)ptr, stack, alloc_type);
 }
 
-void *asan_malloc(uptr size, AsanStackTrace *stack) {
-  void *ptr = (void*)Allocate(0, size, stack);
-  ASAN_NEW_HOOK(ptr, size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void *asan_malloc(uptr size, StackTrace *stack) {
+  void *ptr = (void*)Allocate(0, size, stack, FROM_MALLOC);
+  ASAN_MALLOC_HOOK(ptr, size);
   return ptr;
 }
 
-void *asan_calloc(uptr nmemb, uptr size, AsanStackTrace *stack) {
-  void *ptr = (void*)Allocate(0, nmemb * size, stack);
+void *asan_calloc(uptr nmemb, uptr size, StackTrace *stack) {
+  void *ptr = (void*)Allocate(0, nmemb * size, stack, FROM_MALLOC);
   if (ptr)
     REAL(memset)(ptr, 0, nmemb * size);
-  ASAN_NEW_HOOK(ptr, nmemb * size);
+  ASAN_MALLOC_HOOK(ptr, size);
   return ptr;
 }
 
-void *asan_realloc(void *p, uptr size, AsanStackTrace *stack) {
+void *asan_realloc(void *p, uptr size, StackTrace *stack) {
   if (p == 0) {
-    void *ptr = (void*)Allocate(0, size, stack);
-    ASAN_NEW_HOOK(ptr, size);
+    void *ptr = (void*)Allocate(0, size, stack, FROM_MALLOC);
+    ASAN_MALLOC_HOOK(ptr, size);
     return ptr;
   } else if (size == 0) {
-    ASAN_DELETE_HOOK(p);
-    Deallocate((u8*)p, stack);
+    ASAN_FREE_HOOK(p);
+    Deallocate((u8*)p, stack, FROM_MALLOC);
     return 0;
   }
   return Reallocate((u8*)p, size, stack);
 }
 
-void *asan_valloc(uptr size, AsanStackTrace *stack) {
-  void *ptr = (void*)Allocate(kPageSize, size, stack);
-  ASAN_NEW_HOOK(ptr, size);
+void *asan_valloc(uptr size, StackTrace *stack) {
+  void *ptr = (void*)Allocate(GetPageSizeCached(), size, stack, FROM_MALLOC);
+  ASAN_MALLOC_HOOK(ptr, size);
   return ptr;
 }
 
-void *asan_pvalloc(uptr size, AsanStackTrace *stack) {
-  size = RoundUpTo(size, kPageSize);
+void *asan_pvalloc(uptr size, StackTrace *stack) {
+  uptr PageSize = GetPageSizeCached();
+  size = RoundUpTo(size, PageSize);
   if (size == 0) {
     // pvalloc(0) should allocate one page.
-    size = kPageSize;
+    size = PageSize;
   }
-  void *ptr = (void*)Allocate(kPageSize, size, stack);
-  ASAN_NEW_HOOK(ptr, size);
+  void *ptr = (void*)Allocate(PageSize, size, stack, FROM_MALLOC);
+  ASAN_MALLOC_HOOK(ptr, size);
   return ptr;
 }
 
 int asan_posix_memalign(void **memptr, uptr alignment, uptr size,
-                          AsanStackTrace *stack) {
-  void *ptr = Allocate(alignment, size, stack);
+                          StackTrace *stack) {
+  void *ptr = Allocate(alignment, size, stack, FROM_MALLOC);
   CHECK(IsAligned((uptr)ptr, alignment));
-  ASAN_NEW_HOOK(ptr, size);
+  ASAN_MALLOC_HOOK(ptr, size);
   *memptr = ptr;
   return 0;
 }
 
-uptr asan_malloc_usable_size(void *ptr, AsanStackTrace *stack) {
+uptr asan_malloc_usable_size(void *ptr, StackTrace *stack) {
   CHECK(stack);
   if (ptr == 0) return 0;
   uptr usable_size = malloc_info.AllocationSize((uptr)ptr);
   if (flags()->check_malloc_usable_size && (usable_size == 0)) {
-    AsanReport("ERROR: AddressSanitizer attempting to call "
-               "malloc_usable_size() for pointer which is "
-               "not owned: %p\n", ptr);
-    stack->PrintStack();
-    Describe((uptr)ptr, 1);
-    ShowStatsAndAbort();
+    ReportMallocUsableSizeNotOwned((uptr)ptr, stack);
   }
   return usable_size;
 }
@@ -897,10 +773,6 @@ uptr asan_mz_size(const void *ptr) {
   return malloc_info.AllocationSize((uptr)ptr);
 }
 
-void DescribeHeapAddress(uptr addr, uptr access_size) {
-  Describe(addr, access_size);
-}
-
 void asan_mz_force_lock() {
   malloc_info.ForceLock();
 }
@@ -909,170 +781,11 @@ void asan_mz_force_unlock() {
   malloc_info.ForceUnlock();
 }
 
-// ---------------------- Fake stack-------------------- {{{1
-FakeStack::FakeStack() {
-  CHECK(REAL(memset) != 0);
-  REAL(memset)(this, 0, sizeof(*this));
-}
-
-bool FakeStack::AddrIsInSizeClass(uptr addr, uptr size_class) {
-  uptr mem = allocated_size_classes_[size_class];
-  uptr size = ClassMmapSize(size_class);
-  bool res = mem && addr >= mem && addr < mem + size;
-  return res;
-}
-
-uptr FakeStack::AddrIsInFakeStack(uptr addr) {
-  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
-    if (AddrIsInSizeClass(addr, i)) return allocated_size_classes_[i];
-  }
-  return 0;
-}
-
-// We may want to compute this during compilation.
-inline uptr FakeStack::ComputeSizeClass(uptr alloc_size) {
-  uptr rounded_size = RoundUpToPowerOfTwo(alloc_size);
-  uptr log = Log2(rounded_size);
-  CHECK(alloc_size <= (1UL << log));
-  if (!(alloc_size > (1UL << (log-1)))) {
-    Printf("alloc_size %zu log %zu\n", alloc_size, log);
-  }
-  CHECK(alloc_size > (1UL << (log-1)));
-  uptr res = log < kMinStackFrameSizeLog ? 0 : log - kMinStackFrameSizeLog;
-  CHECK(res < kNumberOfSizeClasses);
-  CHECK(ClassSize(res) >= rounded_size);
-  return res;
-}
-
-void FakeFrameFifo::FifoPush(FakeFrame *node) {
-  CHECK(node);
-  node->next = 0;
-  if (first_ == 0 && last_ == 0) {
-    first_ = last_ = node;
-  } else {
-    CHECK(first_);
-    CHECK(last_);
-    last_->next = node;
-    last_ = node;
-  }
-}
-
-FakeFrame *FakeFrameFifo::FifoPop() {
-  CHECK(first_ && last_ && "Exhausted fake stack");
-  FakeFrame *res = 0;
-  if (first_ == last_) {
-    res = first_;
-    first_ = last_ = 0;
-  } else {
-    res = first_;
-    first_ = first_->next;
-  }
-  return res;
-}
-
-void FakeStack::Init(uptr stack_size) {
-  stack_size_ = stack_size;
-  alive_ = true;
-}
-
-void FakeStack::Cleanup() {
-  alive_ = false;
-  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
-    uptr mem = allocated_size_classes_[i];
-    if (mem) {
-      PoisonShadow(mem, ClassMmapSize(i), 0);
-      allocated_size_classes_[i] = 0;
-      UnmapOrDie((void*)mem, ClassMmapSize(i));
-    }
-  }
-}
-
-uptr FakeStack::ClassMmapSize(uptr size_class) {
-  return RoundUpToPowerOfTwo(stack_size_);
-}
-
-void FakeStack::AllocateOneSizeClass(uptr size_class) {
-  CHECK(ClassMmapSize(size_class) >= kPageSize);
-  uptr new_mem = (uptr)MmapOrDie(
-      ClassMmapSize(size_class), __FUNCTION__);
-  // Printf("T%d new_mem[%zu]: %p-%p mmap %zu\n",
-  //       asanThreadRegistry().GetCurrent()->tid(),
-  //       size_class, new_mem, new_mem + ClassMmapSize(size_class),
-  //       ClassMmapSize(size_class));
-  uptr i;
-  for (i = 0; i < ClassMmapSize(size_class);
-       i += ClassSize(size_class)) {
-    size_classes_[size_class].FifoPush((FakeFrame*)(new_mem + i));
-  }
-  CHECK(i == ClassMmapSize(size_class));
-  allocated_size_classes_[size_class] = new_mem;
-}
-
-uptr FakeStack::AllocateStack(uptr size, uptr real_stack) {
-  if (!alive_) return real_stack;
-  CHECK(size <= kMaxStackMallocSize && size > 1);
-  uptr size_class = ComputeSizeClass(size);
-  if (!allocated_size_classes_[size_class]) {
-    AllocateOneSizeClass(size_class);
-  }
-  FakeFrame *fake_frame = size_classes_[size_class].FifoPop();
-  CHECK(fake_frame);
-  fake_frame->size_minus_one = size - 1;
-  fake_frame->real_stack = real_stack;
-  while (FakeFrame *top = call_stack_.top()) {
-    if (top->real_stack > real_stack) break;
-    call_stack_.LifoPop();
-    DeallocateFrame(top);
-  }
-  call_stack_.LifoPush(fake_frame);
-  uptr ptr = (uptr)fake_frame;
-  PoisonShadow(ptr, size, 0);
-  return ptr;
-}
-
-void FakeStack::DeallocateFrame(FakeFrame *fake_frame) {
-  CHECK(alive_);
-  uptr size = fake_frame->size_minus_one + 1;
-  uptr size_class = ComputeSizeClass(size);
-  CHECK(allocated_size_classes_[size_class]);
-  uptr ptr = (uptr)fake_frame;
-  CHECK(AddrIsInSizeClass(ptr, size_class));
-  CHECK(AddrIsInSizeClass(ptr + size - 1, size_class));
-  size_classes_[size_class].FifoPush(fake_frame);
-}
-
-void FakeStack::OnFree(uptr ptr, uptr size, uptr real_stack) {
-  FakeFrame *fake_frame = (FakeFrame*)ptr;
-  CHECK(fake_frame->magic = kRetiredStackFrameMagic);
-  CHECK(fake_frame->descr != 0);
-  CHECK(fake_frame->size_minus_one == size - 1);
-  PoisonShadow(ptr, size, kAsanStackAfterReturnMagic);
-}
-
 }  // namespace __asan
 
 // ---------------------- Interface ---------------- {{{1
 using namespace __asan;  // NOLINT
 
-uptr __asan_stack_malloc(uptr size, uptr real_stack) {
-  if (!flags()->use_fake_stack) return real_stack;
-  AsanThread *t = asanThreadRegistry().GetCurrent();
-  if (!t) {
-    // TSD is gone, use the real stack.
-    return real_stack;
-  }
-  uptr ptr = t->fake_stack().AllocateStack(size, real_stack);
-  // Printf("__asan_stack_malloc %p %zu %p\n", ptr, size, real_stack);
-  return ptr;
-}
-
-void __asan_stack_free(uptr ptr, uptr size, uptr real_stack) {
-  if (!flags()->use_fake_stack) return;
-  if (ptr != real_stack) {
-    FakeStack::OnFree(ptr, size, real_stack);
-  }
-}
-
 // ASan allocator doesn't reserve extra bytes, so normally we would
 // just return "size".
 uptr __asan_get_estimated_allocated_size(uptr size) {
@@ -1089,12 +802,9 @@ uptr __asan_get_allocated_size(const void *p) {
   uptr allocated_size = malloc_info.AllocationSize((uptr)p);
   // Die if p is not malloced or if it is already freed.
   if (allocated_size == 0) {
-    AsanReport("ERROR: AddressSanitizer attempting to call "
-               "__asan_get_allocated_size() for pointer which is "
-               "not owned: %p\n", p);
-    PRINT_CURRENT_STACK();
-    Describe((uptr)p, 1);
-    ShowStatsAndAbort();
+    GET_STACK_TRACE_FATAL_HERE;
+    ReportAsanGetAllocatedSizeNotOwned((uptr)p, &stack);
   }
   return allocated_size;
 }
+#endif  // ASAN_ALLOCATOR_VERSION
diff --git a/lib/asan/asan_allocator.h b/lib/asan/asan_allocator.h
index 2aed59853868..cca24edad81f 100644
--- a/lib/asan/asan_allocator.h
+++ b/lib/asan/asan_allocator.h
@@ -17,13 +17,76 @@
 
 #include "asan_internal.h"
 #include "asan_interceptors.h"
+#include "sanitizer_common/sanitizer_list.h"
+
+// We are in the process of transitioning from the old allocator (version 1)
+// to a new one (version 2). The change is quite intrusive so both allocators
+// will co-exist in the source base for a while. The actual allocator is chosen
+// at build time by redefining this macro.
+#ifndef ASAN_ALLOCATOR_VERSION
+# if ASAN_LINUX && !ASAN_ANDROID
+#  define ASAN_ALLOCATOR_VERSION 2
+# else
+#  define ASAN_ALLOCATOR_VERSION 1
+# endif
+#endif  // ASAN_ALLOCATOR_VERSION
 
 namespace __asan {
 
+enum AllocType {
+  FROM_MALLOC = 1,  // Memory block came from malloc, calloc, realloc, etc.
+  FROM_NEW = 2,     // Memory block came from operator new.
+  FROM_NEW_BR = 3   // Memory block came from operator new [ ]
+};
+
 static const uptr kNumberOfSizeClasses = 255;
 struct AsanChunk;
 
-class AsanChunkFifoList {
+class AsanChunkView {
+ public:
+  explicit AsanChunkView(AsanChunk *chunk) : chunk_(chunk) {}
+  bool IsValid() { return chunk_ != 0; }
+  uptr Beg();       // first byte of user memory.
+  uptr End();       // last byte of user memory.
+  uptr UsedSize();  // size requested by the user.
+  uptr AllocTid();
+  uptr FreeTid();
+  void GetAllocStack(StackTrace *stack);
+  void GetFreeStack(StackTrace *stack);
+  bool AddrIsInside(uptr addr, uptr access_size, uptr *offset) {
+    if (addr >= Beg() && (addr + access_size) <= End()) {
+      *offset = addr - Beg();
+      return true;
+    }
+    return false;
+  }
+  bool AddrIsAtLeft(uptr addr, uptr access_size, uptr *offset) {
+    (void)access_size;
+    if (addr < Beg()) {
+      *offset = Beg() - addr;
+      return true;
+    }
+    return false;
+  }
+  bool AddrIsAtRight(uptr addr, uptr access_size, uptr *offset) {
+    if (addr + access_size >= End()) {
+      if (addr <= End())
+        *offset = 0;
+      else
+        *offset = addr - End();
+      return true;
+    }
+    return false;
+  }
+
+ private:
+  AsanChunk *const chunk_;
+};
+
+AsanChunkView FindHeapChunkByAddress(uptr address);
+
+// List of AsanChunks with total size.
+class AsanChunkFifoList: public IntrusiveList<AsanChunk> {
  public:
   explicit AsanChunkFifoList(LinkerInitialized) { }
   AsanChunkFifoList() { clear(); }
@@ -32,25 +95,31 @@ class AsanChunkFifoList {
   AsanChunk *Pop();
   uptr size() { return size_; }
   void clear() {
-    first_ = last_ = 0;
+    IntrusiveList<AsanChunk>::clear();
     size_ = 0;
   }
  private:
-  AsanChunk *first_;
-  AsanChunk *last_;
   uptr size_;
 };
 
 struct AsanThreadLocalMallocStorage {
   explicit AsanThreadLocalMallocStorage(LinkerInitialized x)
-      : quarantine_(x) { }
+#if ASAN_ALLOCATOR_VERSION == 1
+      : quarantine_(x)
+#endif
+      { }
   AsanThreadLocalMallocStorage() {
     CHECK(REAL(memset));
     REAL(memset)(this, 0, sizeof(AsanThreadLocalMallocStorage));
   }
 
+#if ASAN_ALLOCATOR_VERSION == 1
   AsanChunkFifoList quarantine_;
   AsanChunk *free_lists_[kNumberOfSizeClasses];
+#else
+  uptr quarantine_cache[16];
+  uptr allocator2_cache[96 * (512 * 8 + 16)];  // Opaque.
+#endif
   void CommitBack();
 };
 
@@ -108,6 +177,7 @@ class FakeStack {
   // Return the bottom of the maped region.
   uptr AddrIsInFakeStack(uptr addr);
   bool StackSize() { return stack_size_; }
+
  private:
   static const uptr kMinStackFrameSizeLog = 9;  // Min frame is 512B.
   static const uptr kMaxStackFrameSizeLog = 16;  // Max stack frame is 64K.
@@ -137,23 +207,70 @@ class FakeStack {
   FakeFrameLifo call_stack_;
 };
 
-void *asan_memalign(uptr alignment, uptr size, AsanStackTrace *stack);
-void asan_free(void *ptr, AsanStackTrace *stack);
+void *asan_memalign(uptr alignment, uptr size, StackTrace *stack,
+                    AllocType alloc_type);
+void asan_free(void *ptr, StackTrace *stack, AllocType alloc_type);
 
-void *asan_malloc(uptr size, AsanStackTrace *stack);
-void *asan_calloc(uptr nmemb, uptr size, AsanStackTrace *stack);
-void *asan_realloc(void *p, uptr size, AsanStackTrace *stack);
-void *asan_valloc(uptr size, AsanStackTrace *stack);
-void *asan_pvalloc(uptr size, AsanStackTrace *stack);
+void *asan_malloc(uptr size, StackTrace *stack);
+void *asan_calloc(uptr nmemb, uptr size, StackTrace *stack);
+void *asan_realloc(void *p, uptr size, StackTrace *stack);
+void *asan_valloc(uptr size, StackTrace *stack);
+void *asan_pvalloc(uptr size, StackTrace *stack);
 
 int asan_posix_memalign(void **memptr, uptr alignment, uptr size,
-                          AsanStackTrace *stack);
-uptr asan_malloc_usable_size(void *ptr, AsanStackTrace *stack);
+                          StackTrace *stack);
+uptr asan_malloc_usable_size(void *ptr, StackTrace *stack);
 
 uptr asan_mz_size(const void *ptr);
 void asan_mz_force_lock();
 void asan_mz_force_unlock();
-void DescribeHeapAddress(uptr addr, uptr access_size);
+
+void PrintInternalAllocatorStats();
+
+// Log2 and RoundUpToPowerOfTwo should be inlined for performance.
+#if defined(_WIN32) && !defined(__clang__)
+extern "C" {
+unsigned char _BitScanForward(unsigned long *index, unsigned long mask);  // NOLINT
+unsigned char _BitScanReverse(unsigned long *index, unsigned long mask);  // NOLINT
+#if defined(_WIN64)
+unsigned char _BitScanForward64(unsigned long *index, unsigned __int64 mask);  // NOLINT
+unsigned char _BitScanReverse64(unsigned long *index, unsigned __int64 mask);  // NOLINT
+#endif
+}
+#endif
+
+static inline uptr Log2(uptr x) {
+  CHECK(IsPowerOfTwo(x));
+#if !defined(_WIN32) || defined(__clang__)
+  return __builtin_ctzl(x);
+#elif defined(_WIN64)
+  unsigned long ret;  // NOLINT
+  _BitScanForward64(&ret, x);
+  return ret;
+#else
+  unsigned long ret;  // NOLINT
+  _BitScanForward(&ret, x);
+  return ret;
+#endif
+}
+
+static inline uptr RoundUpToPowerOfTwo(uptr size) {
+  CHECK(size);
+  if (IsPowerOfTwo(size)) return size;
+
+  unsigned long up;  // NOLINT
+#if !defined(_WIN32) || defined(__clang__)
+  up = SANITIZER_WORDSIZE - 1 - __builtin_clzl(size);
+#elif defined(_WIN64)
+  _BitScanReverse64(&up, size);
+#else
+  _BitScanReverse(&up, size);
+#endif
+  CHECK(size < (1ULL << (up + 1)));
+  CHECK(size > (1ULL << up));
+  return 1UL << (up + 1);
+}
+
 
 }  // namespace __asan
 #endif  // ASAN_ALLOCATOR_H
diff --git a/lib/asan/asan_allocator2.cc b/lib/asan/asan_allocator2.cc
new file mode 100644
index 000000000000..42d8b29afd6b
--- /dev/null
+++ b/lib/asan/asan_allocator2.cc
@@ -0,0 +1,710 @@
+//===-- asan_allocator2.cc ------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// Implementation of ASan's memory allocator, 2-nd version.
+// This variant uses the allocator from sanitizer_common, i.e. the one shared
+// with ThreadSanitizer and MemorySanitizer.
+//
+// Status: under development, not enabled by default yet.
+//===----------------------------------------------------------------------===//
+#include "asan_allocator.h"
+#if ASAN_ALLOCATOR_VERSION == 2
+
+#include "asan_mapping.h"
+#include "asan_report.h"
+#include "asan_thread.h"
+#include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
+#include "sanitizer_common/sanitizer_allocator.h"
+#include "sanitizer_common/sanitizer_internal_defs.h"
+#include "sanitizer_common/sanitizer_list.h"
+#include "sanitizer_common/sanitizer_stackdepot.h"
+#include "sanitizer_common/sanitizer_quarantine.h"
+
+namespace __asan {
+
+struct AsanMapUnmapCallback {
+  void OnMap(uptr p, uptr size) const {
+    PoisonShadow(p, size, kAsanHeapLeftRedzoneMagic);
+    // Statistics.
+    AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+    thread_stats.mmaps++;
+    thread_stats.mmaped += size;
+  }
+  void OnUnmap(uptr p, uptr size) const {
+    PoisonShadow(p, size, 0);
+    // We are about to unmap a chunk of user memory.
+    // Mark the corresponding shadow memory as not needed.
+    // Since asan's mapping is compacting, the shadow chunk may be
+    // not page-aligned, so we only flush the page-aligned portion.
+    uptr page_size = GetPageSizeCached();
+    uptr shadow_beg = RoundUpTo(MemToShadow(p), page_size);
+    uptr shadow_end = RoundDownTo(MemToShadow(p + size), page_size);
+    FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg);
+    // Statistics.
+    AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+    thread_stats.munmaps++;
+    thread_stats.munmaped += size;
+  }
+};
+
+#if SANITIZER_WORDSIZE == 64
+const uptr kAllocatorSpace = 0x600000000000ULL;
+const uptr kAllocatorSize  =  0x10000000000ULL;  // 1T.
+typedef DefaultSizeClassMap SizeClassMap;
+typedef SizeClassAllocator64<kAllocatorSpace, kAllocatorSize, 0 /*metadata*/,
+    SizeClassMap, AsanMapUnmapCallback> PrimaryAllocator;
+#elif SANITIZER_WORDSIZE == 32
+static const u64 kAddressSpaceSize = 1ULL << 32;
+typedef CompactSizeClassMap SizeClassMap;
+typedef SizeClassAllocator32<0, kAddressSpaceSize, 16,
+  SizeClassMap, AsanMapUnmapCallback> PrimaryAllocator;
+#endif
+
+typedef SizeClassAllocatorLocalCache<PrimaryAllocator> AllocatorCache;
+typedef LargeMmapAllocator<AsanMapUnmapCallback> SecondaryAllocator;
+typedef CombinedAllocator<PrimaryAllocator, AllocatorCache,
+    SecondaryAllocator> Allocator;
+
+// We can not use THREADLOCAL because it is not supported on some of the
+// platforms we care about (OSX 10.6, Android).
+// static THREADLOCAL AllocatorCache cache;
+AllocatorCache *GetAllocatorCache(AsanThreadLocalMallocStorage *ms) {
+  CHECK(ms);
+  CHECK_LE(sizeof(AllocatorCache), sizeof(ms->allocator2_cache));
+  return reinterpret_cast<AllocatorCache *>(ms->allocator2_cache);
+}
+
+static Allocator allocator;
+
+static const uptr kMaxAllowedMallocSize =
+  FIRST_32_SECOND_64(3UL << 30, 8UL << 30);
+
+static const uptr kMaxThreadLocalQuarantine =
+  FIRST_32_SECOND_64(1 << 18, 1 << 20);
+
+static const uptr kReturnOnZeroMalloc = 2048;  // Zero page is protected.
+
+// Every chunk of memory allocated by this allocator can be in one of 3 states:
+// CHUNK_AVAILABLE: the chunk is in the free list and ready to be allocated.
+// CHUNK_ALLOCATED: the chunk is allocated and not yet freed.
+// CHUNK_QUARANTINE: the chunk was freed and put into quarantine zone.
+enum {
+  CHUNK_AVAILABLE  = 0,  // 0 is the default value even if we didn't set it.
+  CHUNK_ALLOCATED  = 2,
+  CHUNK_QUARANTINE = 3
+};
+
+// Valid redzone sizes are 16, 32, 64, ... 2048, so we encode them in 3 bits.
+// We use adaptive redzones: for larger allocation larger redzones are used.
+static u32 RZLog2Size(u32 rz_log) {
+  CHECK_LT(rz_log, 8);
+  return 16 << rz_log;
+}
+
+static u32 RZSize2Log(u32 rz_size) {
+  CHECK_GE(rz_size, 16);
+  CHECK_LE(rz_size, 2048);
+  CHECK(IsPowerOfTwo(rz_size));
+  u32 res = __builtin_ctz(rz_size) - 4;
+  CHECK_EQ(rz_size, RZLog2Size(res));
+  return res;
+}
+
+static uptr ComputeRZLog(uptr user_requested_size) {
+  u32 rz_log =
+    user_requested_size <= 64        - 16   ? 0 :
+    user_requested_size <= 128       - 32   ? 1 :
+    user_requested_size <= 512       - 64   ? 2 :
+    user_requested_size <= 4096      - 128  ? 3 :
+    user_requested_size <= (1 << 14) - 256  ? 4 :
+    user_requested_size <= (1 << 15) - 512  ? 5 :
+    user_requested_size <= (1 << 16) - 1024 ? 6 : 7;
+  return Max(rz_log, RZSize2Log(flags()->redzone));
+}
+
+// The memory chunk allocated from the underlying allocator looks like this:
+// L L L L L L H H U U U U U U R R
+//   L -- left redzone words (0 or more bytes)
+//   H -- ChunkHeader (16 bytes), which is also a part of the left redzone.
+//   U -- user memory.
+//   R -- right redzone (0 or more bytes)
+// ChunkBase consists of ChunkHeader and other bytes that overlap with user
+// memory.
+
+// If a memory chunk is allocated by memalign and we had to increase the
+// allocation size to achieve the proper alignment, then we store this magic
+// value in the first uptr word of the memory block and store the address of
+// ChunkBase in the next uptr.
+// M B ? ? ? L L L L L L  H H U U U U U U
+//   M -- magic value kMemalignMagic
+//   B -- address of ChunkHeader pointing to the first 'H'
+static const uptr kMemalignMagic = 0xCC6E96B9;
+
+struct ChunkHeader {
+  // 1-st 8 bytes.
+  u32 chunk_state       : 8;  // Must be first.
+  u32 alloc_tid         : 24;
+
+  u32 free_tid          : 24;
+  u32 from_memalign     : 1;
+  u32 alloc_type        : 2;
+  u32 rz_log            : 3;
+  // 2-nd 8 bytes
+  // This field is used for small sizes. For large sizes it is equal to
+  // SizeClassMap::kMaxSize and the actual size is stored in the
+  // SecondaryAllocator's metadata.
+  u32 user_requested_size;
+  u32 alloc_context_id;
+};
+
+struct ChunkBase : ChunkHeader {
+  // Header2, intersects with user memory.
+  AsanChunk *next;
+  u32 free_context_id;
+};
+
+static const uptr kChunkHeaderSize = sizeof(ChunkHeader);
+static const uptr kChunkHeader2Size = sizeof(ChunkBase) - kChunkHeaderSize;
+COMPILER_CHECK(kChunkHeaderSize == 16);
+COMPILER_CHECK(kChunkHeader2Size <= 16);
+
+struct AsanChunk: ChunkBase {
+  uptr Beg() { return reinterpret_cast<uptr>(this) + kChunkHeaderSize; }
+  uptr UsedSize() {
+    if (user_requested_size != SizeClassMap::kMaxSize)
+      return user_requested_size;
+    return *reinterpret_cast<uptr *>(allocator.GetMetaData(AllocBeg()));
+  }
+  void *AllocBeg() {
+    if (from_memalign)
+      return allocator.GetBlockBegin(reinterpret_cast<void *>(this));
+    return reinterpret_cast<void*>(Beg() - RZLog2Size(rz_log));
+  }
+  // We store the alloc/free stack traces in the chunk itself.
+  u32 *AllocStackBeg() {
+    return (u32*)(Beg() - RZLog2Size(rz_log));
+  }
+  uptr AllocStackSize() {
+    CHECK_LE(RZLog2Size(rz_log), kChunkHeaderSize);
+    return (RZLog2Size(rz_log) - kChunkHeaderSize) / sizeof(u32);
+  }
+  u32 *FreeStackBeg() {
+    return (u32*)(Beg() + kChunkHeader2Size);
+  }
+  uptr FreeStackSize() {
+    if (user_requested_size < kChunkHeader2Size) return 0;
+    uptr available = RoundUpTo(user_requested_size, SHADOW_GRANULARITY);
+    return (available - kChunkHeader2Size) / sizeof(u32);
+  }
+};
+
+uptr AsanChunkView::Beg() { return chunk_->Beg(); }
+uptr AsanChunkView::End() { return Beg() + UsedSize(); }
+uptr AsanChunkView::UsedSize() { return chunk_->UsedSize(); }
+uptr AsanChunkView::AllocTid() { return chunk_->alloc_tid; }
+uptr AsanChunkView::FreeTid() { return chunk_->free_tid; }
+
+static void GetStackTraceFromId(u32 id, StackTrace *stack) {
+  CHECK(id);
+  uptr size = 0;
+  const uptr *trace = StackDepotGet(id, &size);
+  CHECK_LT(size, kStackTraceMax);
+  internal_memcpy(stack->trace, trace, sizeof(uptr) * size);
+  stack->size = size;
+}
+
+void AsanChunkView::GetAllocStack(StackTrace *stack) {
+  if (flags()->use_stack_depot)
+    GetStackTraceFromId(chunk_->alloc_context_id, stack);
+  else
+    StackTrace::UncompressStack(stack, chunk_->AllocStackBeg(),
+                                chunk_->AllocStackSize());
+}
+
+void AsanChunkView::GetFreeStack(StackTrace *stack) {
+  if (flags()->use_stack_depot)
+    GetStackTraceFromId(chunk_->free_context_id, stack);
+  else
+    StackTrace::UncompressStack(stack, chunk_->FreeStackBeg(),
+                                chunk_->FreeStackSize());
+}
+
+struct QuarantineCallback;
+typedef Quarantine<QuarantineCallback, AsanChunk> AsanQuarantine;
+typedef AsanQuarantine::Cache QuarantineCache;
+static AsanQuarantine quarantine(LINKER_INITIALIZED);
+static QuarantineCache fallback_quarantine_cache(LINKER_INITIALIZED);
+static AllocatorCache fallback_allocator_cache;
+static SpinMutex fallback_mutex;
+
+QuarantineCache *GetQuarantineCache(AsanThreadLocalMallocStorage *ms) {
+  CHECK(ms);
+  CHECK_LE(sizeof(QuarantineCache), sizeof(ms->quarantine_cache));
+  return reinterpret_cast<QuarantineCache *>(ms->quarantine_cache);
+}
+
+struct QuarantineCallback {
+  explicit QuarantineCallback(AllocatorCache *cache)
+      : cache_(cache) {
+  }
+
+  void Recycle(AsanChunk *m) {
+    CHECK(m->chunk_state == CHUNK_QUARANTINE);
+    m->chunk_state = CHUNK_AVAILABLE;
+    CHECK_NE(m->alloc_tid, kInvalidTid);
+    CHECK_NE(m->free_tid, kInvalidTid);
+    PoisonShadow(m->Beg(),
+                 RoundUpTo(m->UsedSize(), SHADOW_GRANULARITY),
+                 kAsanHeapLeftRedzoneMagic);
+    void *p = reinterpret_cast<void *>(m->AllocBeg());
+    if (m->from_memalign) {
+      uptr *memalign_magic = reinterpret_cast<uptr *>(p);
+      CHECK_EQ(memalign_magic[0], kMemalignMagic);
+      CHECK_EQ(memalign_magic[1], reinterpret_cast<uptr>(m));
+    }
+
+    // Statistics.
+    AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+    thread_stats.real_frees++;
+    thread_stats.really_freed += m->UsedSize();
+
+    allocator.Deallocate(cache_, p);
+  }
+
+  void *Allocate(uptr size) {
+    return allocator.Allocate(cache_, size, 1, false);
+  }
+
+  void Deallocate(void *p) {
+    allocator.Deallocate(cache_, p);
+  }
+
+  AllocatorCache *cache_;
+};
+
+static void Init() {
+  static int inited = 0;
+  if (inited) return;
+  __asan_init();
+  inited = true;  // this must happen before any threads are created.
+  allocator.Init();
+  quarantine.Init((uptr)flags()->quarantine_size, kMaxThreadLocalQuarantine);
+}
+
+static void *Allocate(uptr size, uptr alignment, StackTrace *stack,
+                      AllocType alloc_type) {
+  Init();
+  CHECK(stack);
+  const uptr min_alignment = SHADOW_GRANULARITY;
+  if (alignment < min_alignment)
+    alignment = min_alignment;
+  if (size == 0) {
+    if (alignment <= kReturnOnZeroMalloc)
+      return reinterpret_cast<void *>(kReturnOnZeroMalloc);
+    else
+      return 0;  // 0 bytes with large alignment requested. Just return 0.
+  }
+  CHECK(IsPowerOfTwo(alignment));
+  uptr rz_log = ComputeRZLog(size);
+  uptr rz_size = RZLog2Size(rz_log);
+  uptr rounded_size = RoundUpTo(size, alignment);
+  if (rounded_size < kChunkHeader2Size)
+    rounded_size = kChunkHeader2Size;
+  uptr needed_size = rounded_size + rz_size;
+  if (alignment > min_alignment)
+    needed_size += alignment;
+  bool using_primary_allocator = true;
+  // If we are allocating from the secondary allocator, there will be no
+  // automatic right redzone, so add the right redzone manually.
+  if (!PrimaryAllocator::CanAllocate(needed_size, alignment)) {
+    needed_size += rz_size;
+    using_primary_allocator = false;
+  }
+  CHECK(IsAligned(needed_size, min_alignment));
+  if (size > kMaxAllowedMallocSize || needed_size > kMaxAllowedMallocSize) {
+    Report("WARNING: AddressSanitizer failed to allocate %p bytes\n",
+           (void*)size);
+    return 0;
+  }
+
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  void *allocated;
+  if (t) {
+    AllocatorCache *cache = GetAllocatorCache(&t->malloc_storage());
+    allocated = allocator.Allocate(cache, needed_size, 8, false);
+  } else {
+    SpinMutexLock l(&fallback_mutex);
+    AllocatorCache *cache = &fallback_allocator_cache;
+    allocated = allocator.Allocate(cache, needed_size, 8, false);
+  }
+  uptr alloc_beg = reinterpret_cast<uptr>(allocated);
+  // Clear the first allocated word (an old kMemalignMagic may still be there).
+  reinterpret_cast<uptr *>(alloc_beg)[0] = 0;
+  uptr alloc_end = alloc_beg + needed_size;
+  uptr beg_plus_redzone = alloc_beg + rz_size;
+  uptr user_beg = beg_plus_redzone;
+  if (!IsAligned(user_beg, alignment))
+    user_beg = RoundUpTo(user_beg, alignment);
+  uptr user_end = user_beg + size;
+  CHECK_LE(user_end, alloc_end);
+  uptr chunk_beg = user_beg - kChunkHeaderSize;
+  AsanChunk *m = reinterpret_cast<AsanChunk *>(chunk_beg);
+  m->chunk_state = CHUNK_ALLOCATED;
+  m->alloc_type = alloc_type;
+  m->rz_log = rz_log;
+  u32 alloc_tid = t ? t->tid() : 0;
+  m->alloc_tid = alloc_tid;
+  CHECK_EQ(alloc_tid, m->alloc_tid);  // Does alloc_tid fit into the bitfield?
+  m->free_tid = kInvalidTid;
+  m->from_memalign = user_beg != beg_plus_redzone;
+  if (m->from_memalign) {
+    CHECK_LE(beg_plus_redzone + 2 * sizeof(uptr), user_beg);
+    uptr *memalign_magic = reinterpret_cast<uptr *>(alloc_beg);
+    memalign_magic[0] = kMemalignMagic;
+    memalign_magic[1] = chunk_beg;
+  }
+  if (using_primary_allocator) {
+    CHECK(size);
+    m->user_requested_size = size;
+    CHECK(allocator.FromPrimary(allocated));
+  } else {
+    CHECK(!allocator.FromPrimary(allocated));
+    m->user_requested_size = SizeClassMap::kMaxSize;
+    uptr *meta = reinterpret_cast<uptr *>(allocator.GetMetaData(allocated));
+    meta[0] = size;
+    meta[1] = chunk_beg;
+  }
+
+  if (flags()->use_stack_depot) {
+    m->alloc_context_id = StackDepotPut(stack->trace, stack->size);
+  } else {
+    m->alloc_context_id = 0;
+    StackTrace::CompressStack(stack, m->AllocStackBeg(), m->AllocStackSize());
+  }
+
+  uptr size_rounded_down_to_granularity = RoundDownTo(size, SHADOW_GRANULARITY);
+  // Unpoison the bulk of the memory region.
+  if (size_rounded_down_to_granularity)
+    PoisonShadow(user_beg, size_rounded_down_to_granularity, 0);
+  // Deal with the end of the region if size is not aligned to granularity.
+  if (size != size_rounded_down_to_granularity && flags()->poison_heap) {
+    u8 *shadow = (u8*)MemToShadow(user_beg + size_rounded_down_to_granularity);
+    *shadow = size & (SHADOW_GRANULARITY - 1);
+  }
+
+  AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+  thread_stats.mallocs++;
+  thread_stats.malloced += size;
+  thread_stats.malloced_redzones += needed_size - size;
+  uptr class_id = Min(kNumberOfSizeClasses, SizeClassMap::ClassID(needed_size));
+  thread_stats.malloced_by_size[class_id]++;
+  if (needed_size > SizeClassMap::kMaxSize)
+    thread_stats.malloc_large++;
+
+  void *res = reinterpret_cast<void *>(user_beg);
+  ASAN_MALLOC_HOOK(res, size);
+  return res;
+}
+
+static void Deallocate(void *ptr, StackTrace *stack, AllocType alloc_type) {
+  uptr p = reinterpret_cast<uptr>(ptr);
+  if (p == 0 || p == kReturnOnZeroMalloc) return;
+  uptr chunk_beg = p - kChunkHeaderSize;
+  AsanChunk *m = reinterpret_cast<AsanChunk *>(chunk_beg);
+
+  // Flip the chunk_state atomically to avoid race on double-free.
+  u8 old_chunk_state = atomic_exchange((atomic_uint8_t*)m, CHUNK_QUARANTINE,
+                                       memory_order_relaxed);
+
+  if (old_chunk_state == CHUNK_QUARANTINE)
+    ReportDoubleFree((uptr)ptr, stack);
+  else if (old_chunk_state != CHUNK_ALLOCATED)
+    ReportFreeNotMalloced((uptr)ptr, stack);
+  CHECK(old_chunk_state == CHUNK_ALLOCATED);
+  if (m->alloc_type != alloc_type && flags()->alloc_dealloc_mismatch)
+    ReportAllocTypeMismatch((uptr)ptr, stack,
+                            (AllocType)m->alloc_type, (AllocType)alloc_type);
+
+  CHECK_GE(m->alloc_tid, 0);
+  if (SANITIZER_WORDSIZE == 64)  // On 32-bits this resides in user area.
+    CHECK_EQ(m->free_tid, kInvalidTid);
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  m->free_tid = t ? t->tid() : 0;
+  if (flags()->use_stack_depot) {
+    m->free_context_id = StackDepotPut(stack->trace, stack->size);
+  } else {
+    m->free_context_id = 0;
+    StackTrace::CompressStack(stack, m->FreeStackBeg(), m->FreeStackSize());
+  }
+  CHECK(m->chunk_state == CHUNK_QUARANTINE);
+  // Poison the region.
+  PoisonShadow(m->Beg(),
+               RoundUpTo(m->UsedSize(), SHADOW_GRANULARITY),
+               kAsanHeapFreeMagic);
+
+  AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+  thread_stats.frees++;
+  thread_stats.freed += m->UsedSize();
+
+  // Push into quarantine.
+  if (t) {
+    AsanThreadLocalMallocStorage *ms = &t->malloc_storage();
+    AllocatorCache *ac = GetAllocatorCache(ms);
+    quarantine.Put(GetQuarantineCache(ms), QuarantineCallback(ac),
+                   m, m->UsedSize());
+  } else {
+    SpinMutexLock l(&fallback_mutex);
+    AllocatorCache *ac = &fallback_allocator_cache;
+    quarantine.Put(&fallback_quarantine_cache, QuarantineCallback(ac),
+                   m, m->UsedSize());
+  }
+
+  ASAN_FREE_HOOK(ptr);
+}
+
+static void *Reallocate(void *old_ptr, uptr new_size, StackTrace *stack) {
+  CHECK(old_ptr && new_size);
+  uptr p = reinterpret_cast<uptr>(old_ptr);
+  uptr chunk_beg = p - kChunkHeaderSize;
+  AsanChunk *m = reinterpret_cast<AsanChunk *>(chunk_beg);
+
+  AsanStats &thread_stats = asanThreadRegistry().GetCurrentThreadStats();
+  thread_stats.reallocs++;
+  thread_stats.realloced += new_size;
+
+  CHECK(m->chunk_state == CHUNK_ALLOCATED);
+  uptr old_size = m->UsedSize();
+  uptr memcpy_size = Min(new_size, old_size);
+  void *new_ptr = Allocate(new_size, 8, stack, FROM_MALLOC);
+  if (new_ptr) {
+    CHECK(REAL(memcpy) != 0);
+    REAL(memcpy)(new_ptr, old_ptr, memcpy_size);
+    Deallocate(old_ptr, stack, FROM_MALLOC);
+  }
+  return new_ptr;
+}
+
+static AsanChunk *GetAsanChunkByAddr(uptr p) {
+  void *ptr = reinterpret_cast<void *>(p);
+  uptr alloc_beg = reinterpret_cast<uptr>(allocator.GetBlockBegin(ptr));
+  if (!alloc_beg) return 0;
+  uptr *memalign_magic = reinterpret_cast<uptr *>(alloc_beg);
+  if (memalign_magic[0] == kMemalignMagic) {
+    AsanChunk *m = reinterpret_cast<AsanChunk *>(memalign_magic[1]);
+    CHECK(m->from_memalign);
+    return m;
+  }
+  if (!allocator.FromPrimary(ptr)) {
+    uptr *meta = reinterpret_cast<uptr *>(
+        allocator.GetMetaData(reinterpret_cast<void *>(alloc_beg)));
+    AsanChunk *m = reinterpret_cast<AsanChunk *>(meta[1]);
+    return m;
+  }
+  uptr actual_size = allocator.GetActuallyAllocatedSize(ptr);
+  CHECK_LE(actual_size, SizeClassMap::kMaxSize);
+  // We know the actually allocted size, but we don't know the redzone size.
+  // Just try all possible redzone sizes.
+  for (u32 rz_log = 0; rz_log < 8; rz_log++) {
+    u32 rz_size = RZLog2Size(rz_log);
+    uptr max_possible_size = actual_size - rz_size;
+    if (ComputeRZLog(max_possible_size) != rz_log)
+      continue;
+    return reinterpret_cast<AsanChunk *>(
+        alloc_beg + rz_size - kChunkHeaderSize);
+  }
+  return 0;
+}
+
+static uptr AllocationSize(uptr p) {
+  AsanChunk *m = GetAsanChunkByAddr(p);
+  if (!m) return 0;
+  if (m->chunk_state != CHUNK_ALLOCATED) return 0;
+  if (m->Beg() != p) return 0;
+  return m->UsedSize();
+}
+
+// We have an address between two chunks, and we want to report just one.
+AsanChunk *ChooseChunk(uptr addr,
+                       AsanChunk *left_chunk, AsanChunk *right_chunk) {
+  // Prefer an allocated chunk over freed chunk and freed chunk
+  // over available chunk.
+  if (left_chunk->chunk_state != right_chunk->chunk_state) {
+    if (left_chunk->chunk_state == CHUNK_ALLOCATED)
+      return left_chunk;
+    if (right_chunk->chunk_state == CHUNK_ALLOCATED)
+      return right_chunk;
+    if (left_chunk->chunk_state == CHUNK_QUARANTINE)
+      return left_chunk;
+    if (right_chunk->chunk_state == CHUNK_QUARANTINE)
+      return right_chunk;
+  }
+  // Same chunk_state: choose based on offset.
+  uptr l_offset = 0, r_offset = 0;
+  CHECK(AsanChunkView(left_chunk).AddrIsAtRight(addr, 1, &l_offset));
+  CHECK(AsanChunkView(right_chunk).AddrIsAtLeft(addr, 1, &r_offset));
+  if (l_offset < r_offset)
+    return left_chunk;
+  return right_chunk;
+}
+
+AsanChunkView FindHeapChunkByAddress(uptr addr) {
+  AsanChunk *m1 = GetAsanChunkByAddr(addr);
+  if (!m1) return AsanChunkView(m1);
+  uptr offset = 0;
+  if (AsanChunkView(m1).AddrIsAtLeft(addr, 1, &offset)) {
+    // The address is in the chunk's left redzone, so maybe it is actually
+    // a right buffer overflow from the other chunk to the left.
+    // Search a bit to the left to see if there is another chunk.
+    AsanChunk *m2 = 0;
+    for (uptr l = 1; l < GetPageSizeCached(); l++) {
+      m2 = GetAsanChunkByAddr(addr - l);
+      if (m2 == m1) continue;  // Still the same chunk.
+      break;
+    }
+    if (m2 && AsanChunkView(m2).AddrIsAtRight(addr, 1, &offset))
+      m1 = ChooseChunk(addr, m2, m1);
+  }
+  return AsanChunkView(m1);
+}
+
+void AsanThreadLocalMallocStorage::CommitBack() {
+  AllocatorCache *ac = GetAllocatorCache(this);
+  quarantine.Drain(GetQuarantineCache(this), QuarantineCallback(ac));
+  allocator.SwallowCache(GetAllocatorCache(this));
+}
+
+void PrintInternalAllocatorStats() {
+  allocator.PrintStats();
+}
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void *asan_memalign(uptr alignment, uptr size, StackTrace *stack,
+                    AllocType alloc_type) {
+  return Allocate(size, alignment, stack, alloc_type);
+}
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void asan_free(void *ptr, StackTrace *stack, AllocType alloc_type) {
+  Deallocate(ptr, stack, alloc_type);
+}
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void *asan_malloc(uptr size, StackTrace *stack) {
+  return Allocate(size, 8, stack, FROM_MALLOC);
+}
+
+void *asan_calloc(uptr nmemb, uptr size, StackTrace *stack) {
+  void *ptr = Allocate(nmemb * size, 8, stack, FROM_MALLOC);
+  if (ptr)
+    REAL(memset)(ptr, 0, nmemb * size);
+  return ptr;
+}
+
+void *asan_realloc(void *p, uptr size, StackTrace *stack) {
+  if (p == 0)
+    return Allocate(size, 8, stack, FROM_MALLOC);
+  if (size == 0) {
+    Deallocate(p, stack, FROM_MALLOC);
+    return 0;
+  }
+  return Reallocate(p, size, stack);
+}
+
+void *asan_valloc(uptr size, StackTrace *stack) {
+  return Allocate(size, GetPageSizeCached(), stack, FROM_MALLOC);
+}
+
+void *asan_pvalloc(uptr size, StackTrace *stack) {
+  uptr PageSize = GetPageSizeCached();
+  size = RoundUpTo(size, PageSize);
+  if (size == 0) {
+    // pvalloc(0) should allocate one page.
+    size = PageSize;
+  }
+  return Allocate(size, PageSize, stack, FROM_MALLOC);
+}
+
+int asan_posix_memalign(void **memptr, uptr alignment, uptr size,
+                        StackTrace *stack) {
+  void *ptr = Allocate(size, alignment, stack, FROM_MALLOC);
+  CHECK(IsAligned((uptr)ptr, alignment));
+  *memptr = ptr;
+  return 0;
+}
+
+uptr asan_malloc_usable_size(void *ptr, StackTrace *stack) {
+  CHECK(stack);
+  if (ptr == 0) return 0;
+  uptr usable_size = AllocationSize(reinterpret_cast<uptr>(ptr));
+  if (flags()->check_malloc_usable_size && (usable_size == 0))
+    ReportMallocUsableSizeNotOwned((uptr)ptr, stack);
+  return usable_size;
+}
+
+uptr asan_mz_size(const void *ptr) {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+void asan_mz_force_lock() {
+  UNIMPLEMENTED();
+}
+
+void asan_mz_force_unlock() {
+  UNIMPLEMENTED();
+}
+
+}  // namespace __asan
+
+// ---------------------- Interface ---------------- {{{1
+using namespace __asan;  // NOLINT
+
+// ASan allocator doesn't reserve extra bytes, so normally we would
+// just return "size". We don't want to expose our redzone sizes, etc here.
+uptr __asan_get_estimated_allocated_size(uptr size) {
+  return size;
+}
+
+bool __asan_get_ownership(const void *p) {
+  uptr ptr = reinterpret_cast<uptr>(p);
+  return (ptr == kReturnOnZeroMalloc) || (AllocationSize(ptr) > 0);
+}
+
+uptr __asan_get_allocated_size(const void *p) {
+  if (p == 0) return 0;
+  uptr ptr = reinterpret_cast<uptr>(p);
+  uptr allocated_size = AllocationSize(ptr);
+  // Die if p is not malloced or if it is already freed.
+  if (allocated_size == 0 && ptr != kReturnOnZeroMalloc) {
+    GET_STACK_TRACE_FATAL_HERE;
+    ReportAsanGetAllocatedSizeNotOwned(ptr, &stack);
+  }
+  return allocated_size;
+}
+
+#if !SANITIZER_SUPPORTS_WEAK_HOOKS
+// Provide default (no-op) implementation of malloc hooks.
+extern "C" {
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
+void __asan_malloc_hook(void *ptr, uptr size) {
+  (void)ptr;
+  (void)size;
+}
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
+void __asan_free_hook(void *ptr) {
+  (void)ptr;
+}
+}  // extern "C"
+#endif
+
+
+#endif  // ASAN_ALLOCATOR_VERSION
diff --git a/lib/asan/asan_fake_stack.cc b/lib/asan/asan_fake_stack.cc
new file mode 100644
index 000000000000..7c5a16312d46
--- /dev/null
+++ b/lib/asan/asan_fake_stack.cc
@@ -0,0 +1,182 @@
+//===-- asan_fake_stack.cc ------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// FakeStack is used to detect use-after-return bugs.
+//===----------------------------------------------------------------------===//
+#include "asan_allocator.h"
+#include "asan_thread.h"
+#include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
+
+namespace __asan {
+
+FakeStack::FakeStack() {
+  CHECK(REAL(memset) != 0);
+  REAL(memset)(this, 0, sizeof(*this));
+}
+
+bool FakeStack::AddrIsInSizeClass(uptr addr, uptr size_class) {
+  uptr mem = allocated_size_classes_[size_class];
+  uptr size = ClassMmapSize(size_class);
+  bool res = mem && addr >= mem && addr < mem + size;
+  return res;
+}
+
+uptr FakeStack::AddrIsInFakeStack(uptr addr) {
+  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
+    if (AddrIsInSizeClass(addr, i)) return allocated_size_classes_[i];
+  }
+  return 0;
+}
+
+// We may want to compute this during compilation.
+inline uptr FakeStack::ComputeSizeClass(uptr alloc_size) {
+  uptr rounded_size = RoundUpToPowerOfTwo(alloc_size);
+  uptr log = Log2(rounded_size);
+  CHECK(alloc_size <= (1UL << log));
+  if (!(alloc_size > (1UL << (log-1)))) {
+    Printf("alloc_size %zu log %zu\n", alloc_size, log);
+  }
+  CHECK(alloc_size > (1UL << (log-1)));
+  uptr res = log < kMinStackFrameSizeLog ? 0 : log - kMinStackFrameSizeLog;
+  CHECK(res < kNumberOfSizeClasses);
+  CHECK(ClassSize(res) >= rounded_size);
+  return res;
+}
+
+void FakeFrameFifo::FifoPush(FakeFrame *node) {
+  CHECK(node);
+  node->next = 0;
+  if (first_ == 0 && last_ == 0) {
+    first_ = last_ = node;
+  } else {
+    CHECK(first_);
+    CHECK(last_);
+    last_->next = node;
+    last_ = node;
+  }
+}
+
+FakeFrame *FakeFrameFifo::FifoPop() {
+  CHECK(first_ && last_ && "Exhausted fake stack");
+  FakeFrame *res = 0;
+  if (first_ == last_) {
+    res = first_;
+    first_ = last_ = 0;
+  } else {
+    res = first_;
+    first_ = first_->next;
+  }
+  return res;
+}
+
+void FakeStack::Init(uptr stack_size) {
+  stack_size_ = stack_size;
+  alive_ = true;
+}
+
+void FakeStack::Cleanup() {
+  alive_ = false;
+  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
+    uptr mem = allocated_size_classes_[i];
+    if (mem) {
+      PoisonShadow(mem, ClassMmapSize(i), 0);
+      allocated_size_classes_[i] = 0;
+      UnmapOrDie((void*)mem, ClassMmapSize(i));
+    }
+  }
+}
+
+uptr FakeStack::ClassMmapSize(uptr size_class) {
+  return RoundUpToPowerOfTwo(stack_size_);
+}
+
+void FakeStack::AllocateOneSizeClass(uptr size_class) {
+  CHECK(ClassMmapSize(size_class) >= GetPageSizeCached());
+  uptr new_mem = (uptr)MmapOrDie(
+      ClassMmapSize(size_class), __FUNCTION__);
+  // Printf("T%d new_mem[%zu]: %p-%p mmap %zu\n",
+  //       asanThreadRegistry().GetCurrent()->tid(),
+  //       size_class, new_mem, new_mem + ClassMmapSize(size_class),
+  //       ClassMmapSize(size_class));
+  uptr i;
+  for (i = 0; i < ClassMmapSize(size_class);
+       i += ClassSize(size_class)) {
+    size_classes_[size_class].FifoPush((FakeFrame*)(new_mem + i));
+  }
+  CHECK(i == ClassMmapSize(size_class));
+  allocated_size_classes_[size_class] = new_mem;
+}
+
+uptr FakeStack::AllocateStack(uptr size, uptr real_stack) {
+  if (!alive_) return real_stack;
+  CHECK(size <= kMaxStackMallocSize && size > 1);
+  uptr size_class = ComputeSizeClass(size);
+  if (!allocated_size_classes_[size_class]) {
+    AllocateOneSizeClass(size_class);
+  }
+  FakeFrame *fake_frame = size_classes_[size_class].FifoPop();
+  CHECK(fake_frame);
+  fake_frame->size_minus_one = size - 1;
+  fake_frame->real_stack = real_stack;
+  while (FakeFrame *top = call_stack_.top()) {
+    if (top->real_stack > real_stack) break;
+    call_stack_.LifoPop();
+    DeallocateFrame(top);
+  }
+  call_stack_.LifoPush(fake_frame);
+  uptr ptr = (uptr)fake_frame;
+  PoisonShadow(ptr, size, 0);
+  return ptr;
+}
+
+void FakeStack::DeallocateFrame(FakeFrame *fake_frame) {
+  CHECK(alive_);
+  uptr size = fake_frame->size_minus_one + 1;
+  uptr size_class = ComputeSizeClass(size);
+  CHECK(allocated_size_classes_[size_class]);
+  uptr ptr = (uptr)fake_frame;
+  CHECK(AddrIsInSizeClass(ptr, size_class));
+  CHECK(AddrIsInSizeClass(ptr + size - 1, size_class));
+  size_classes_[size_class].FifoPush(fake_frame);
+}
+
+void FakeStack::OnFree(uptr ptr, uptr size, uptr real_stack) {
+  FakeFrame *fake_frame = (FakeFrame*)ptr;
+  CHECK(fake_frame->magic = kRetiredStackFrameMagic);
+  CHECK(fake_frame->descr != 0);
+  CHECK(fake_frame->size_minus_one == size - 1);
+  PoisonShadow(ptr, size, kAsanStackAfterReturnMagic);
+}
+
+}  // namespace __asan
+
+// ---------------------- Interface ---------------- {{{1
+using namespace __asan;  // NOLINT
+
+uptr __asan_stack_malloc(uptr size, uptr real_stack) {
+  if (!flags()->use_fake_stack) return real_stack;
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  if (!t) {
+    // TSD is gone, use the real stack.
+    return real_stack;
+  }
+  uptr ptr = t->fake_stack().AllocateStack(size, real_stack);
+  // Printf("__asan_stack_malloc %p %zu %p\n", ptr, size, real_stack);
+  return ptr;
+}
+
+void __asan_stack_free(uptr ptr, uptr size, uptr real_stack) {
+  if (!flags()->use_fake_stack) return;
+  if (ptr != real_stack) {
+    FakeStack::OnFree(ptr, size, real_stack);
+  }
+}
diff --git a/lib/asan/asan_flags.h b/lib/asan/asan_flags.h
index ca9cf84ba6c5..d7b21ea4a45f 100644
--- a/lib/asan/asan_flags.h
+++ b/lib/asan/asan_flags.h
@@ -15,7 +15,7 @@
 #ifndef ASAN_FLAGS_H
 #define ASAN_FLAGS_H
 
-#include "sanitizer_common/sanitizer_interface_defs.h"
+#include "sanitizer/common_interface_defs.h"
 
 // ASan flag values can be defined in three ways:
 // 1) initialized with default values at startup.
@@ -23,11 +23,6 @@
 //    __asan_default_options().
 // 3) overriden from env variable ASAN_OPTIONS.
 
-extern "C" {
-// Can be overriden by user.
-const char *__asan_default_options() SANITIZER_WEAK_ATTRIBUTE;
-}  // extern "C"
-
 namespace __asan {
 
 struct Flags {
@@ -48,7 +43,9 @@ struct Flags {
   // on globals, 1 - detect buffer overflow, 2 - print data about registered
   // globals).
   int  report_globals;
-  // Max number of stack frames kept for each allocation.
+  // If set, attempts to catch initialization order issues.
+  bool check_initialization_order;
+  // Max number of stack frames kept for each allocation/deallocation.
   int  malloc_context_size;
   // If set, uses custom wrappers and replacements for libc string functions
   // to find more errors.
@@ -87,6 +84,28 @@ struct Flags {
   // By default, disable core dumper on 64-bit - it makes little sense
   // to dump 16T+ core.
   bool disable_core;
+  // Allow the tool to re-exec the program. This may interfere badly with the
+  // debugger.
+  bool allow_reexec;
+  // Strips this prefix from file paths in error reports.
+  const char *strip_path_prefix;
+  // If set, prints not only thread creation stacks for threads in error report,
+  // but also thread creation stacks for threads that created those threads,
+  // etc. up to main thread.
+  bool print_full_thread_history;
+  // ASan will write logs to "log_path.pid" instead of stderr.
+  const char *log_path;
+  // Use fast (frame-pointer-based) unwinder on fatal errors (if available).
+  bool fast_unwind_on_fatal;
+  // Use fast (frame-pointer-based) unwinder on malloc/free (if available).
+  bool fast_unwind_on_malloc;
+  // Poison (or not) the heap memory on [de]allocation. Zero value is useful
+  // for benchmarking the allocator or instrumentator.
+  bool poison_heap;
+  // Report errors on malloc/delete, new/free, new/delete[], etc.
+  bool alloc_dealloc_mismatch;
+  // Use stack depot instead of storing stacks in the redzones.
+  bool use_stack_depot;
 };
 
 Flags *flags();
diff --git a/lib/asan/asan_globals.cc b/lib/asan/asan_globals.cc
index f8c4040b8e86..4e18bb8e2355 100644
--- a/lib/asan/asan_globals.cc
+++ b/lib/asan/asan_globals.cc
@@ -12,15 +12,14 @@
 // Handle globals.
 //===----------------------------------------------------------------------===//
 #include "asan_interceptors.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_mapping.h"
+#include "asan_report.h"
 #include "asan_stack.h"
 #include "asan_stats.h"
 #include "asan_thread.h"
-
-#include <ctype.h>
+#include "sanitizer/asan_interface.h"
+#include "sanitizer_common/sanitizer_mutex.h"
 
 namespace __asan {
 
@@ -31,9 +30,10 @@ struct ListOfGlobals {
   ListOfGlobals *next;
 };
 
-static AsanLock mu_for_globals(LINKER_INITIALIZED);
-static ListOfGlobals *list_of_globals;
-static LowLevelAllocator allocator_for_globals(LINKER_INITIALIZED);
+static BlockingMutex mu_for_globals(LINKER_INITIALIZED);
+static LowLevelAllocator allocator_for_globals;
+static ListOfGlobals *list_of_all_globals;
+static ListOfGlobals *list_of_dynamic_init_globals;
 
 void PoisonRedZones(const Global &g)  {
   uptr shadow_rz_size = kGlobalAndStackRedzone >> SHADOW_SCALE;
@@ -55,48 +55,16 @@ void PoisonRedZones(const Global &g)  {
   }
 }
 
-static uptr GetAlignedSize(uptr size) {
-  return ((size + kGlobalAndStackRedzone - 1) / kGlobalAndStackRedzone)
-      * kGlobalAndStackRedzone;
-}
-
-  // Check if the global is a zero-terminated ASCII string. If so, print it.
-void PrintIfASCII(const Global &g) {
-  for (uptr p = g.beg; p < g.beg + g.size - 1; p++) {
-    if (!isascii(*(char*)p)) return;
-  }
-  if (*(char*)(g.beg + g.size - 1) != 0) return;
-  AsanPrintf("  '%s' is ascii string '%s'\n", g.name, (char*)g.beg);
-}
-
-bool DescribeAddrIfMyRedZone(const Global &g, uptr addr) {
-  if (addr < g.beg - kGlobalAndStackRedzone) return false;
-  if (addr >= g.beg + g.size_with_redzone) return false;
-  AsanPrintf("%p is located ", (void*)addr);
-  if (addr < g.beg) {
-    AsanPrintf("%zd bytes to the left", g.beg - addr);
-  } else if (addr >= g.beg + g.size) {
-    AsanPrintf("%zd bytes to the right", addr - (g.beg + g.size));
-  } else {
-    AsanPrintf("%zd bytes inside", addr - g.beg);  // Can it happen?
-  }
-  AsanPrintf(" of global variable '%s' (0x%zx) of size %zu\n",
-             g.name, g.beg, g.size);
-  PrintIfASCII(g);
-  return true;
-}
-
-
-bool DescribeAddrIfGlobal(uptr addr) {
+bool DescribeAddressIfGlobal(uptr addr) {
   if (!flags()->report_globals) return false;
-  ScopedLock lock(&mu_for_globals);
+  BlockingMutexLock lock(&mu_for_globals);
   bool res = false;
-  for (ListOfGlobals *l = list_of_globals; l; l = l->next) {
+  for (ListOfGlobals *l = list_of_all_globals; l; l = l->next) {
     const Global &g = *l->g;
     if (flags()->report_globals >= 2)
-      AsanPrintf("Search Global: beg=%p size=%zu name=%s\n",
-                 (void*)g.beg, g.size, (char*)g.name);
-    res |= DescribeAddrIfMyRedZone(g, addr);
+      Report("Search Global: beg=%p size=%zu name=%s\n",
+             (void*)g.beg, g.size, (char*)g.name);
+    res |= DescribeAddressRelativeToGlobal(addr, g);
   }
   return res;
 }
@@ -106,6 +74,10 @@ bool DescribeAddrIfGlobal(uptr addr) {
 // so we store the globals in a map.
 static void RegisterGlobal(const Global *g) {
   CHECK(asan_inited);
+  if (flags()->report_globals >= 2)
+    Report("Added Global: beg=%p size=%zu/%zu name=%s dyn.init=%zu\n",
+           (void*)g->beg, g->size, g->size_with_redzone, g->name,
+           g->has_dynamic_init);
   CHECK(flags()->report_globals);
   CHECK(AddrIsInMem(g->beg));
   CHECK(AddrIsAlignedByGranularity(g->beg));
@@ -114,11 +86,14 @@ static void RegisterGlobal(const Global *g) {
   ListOfGlobals *l =
       (ListOfGlobals*)allocator_for_globals.Allocate(sizeof(ListOfGlobals));
   l->g = g;
-  l->next = list_of_globals;
-  list_of_globals = l;
-  if (flags()->report_globals >= 2)
-    Report("Added Global: beg=%p size=%zu name=%s\n",
-           (void*)g->beg, g->size, g->name);
+  l->next = list_of_all_globals;
+  list_of_all_globals = l;
+  if (g->has_dynamic_init) {
+    l = (ListOfGlobals*)allocator_for_globals.Allocate(sizeof(ListOfGlobals));
+    l->g = g;
+    l->next = list_of_dynamic_init_globals;
+    list_of_dynamic_init_globals = l;
+  }
 }
 
 static void UnregisterGlobal(const Global *g) {
@@ -133,39 +108,83 @@ static void UnregisterGlobal(const Global *g) {
   // implementation. It might not be worth doing anyway.
 }
 
+// Poison all shadow memory for a single global.
+static void PoisonGlobalAndRedzones(const Global *g) {
+  CHECK(asan_inited);
+  CHECK(flags()->check_initialization_order);
+  CHECK(AddrIsInMem(g->beg));
+  CHECK(AddrIsAlignedByGranularity(g->beg));
+  CHECK(AddrIsAlignedByGranularity(g->size_with_redzone));
+  if (flags()->report_globals >= 3)
+    Printf("DynInitPoison  : %s\n", g->name);
+  PoisonShadow(g->beg, g->size_with_redzone, kAsanInitializationOrderMagic);
+}
+
+static void UnpoisonGlobal(const Global *g) {
+  CHECK(asan_inited);
+  CHECK(flags()->check_initialization_order);
+  CHECK(AddrIsInMem(g->beg));
+  CHECK(AddrIsAlignedByGranularity(g->beg));
+  CHECK(AddrIsAlignedByGranularity(g->size_with_redzone));
+  if (flags()->report_globals >= 3)
+    Printf("DynInitUnpoison: %s\n", g->name);
+  PoisonShadow(g->beg, g->size_with_redzone, 0);
+  PoisonRedZones(*g);
+}
+
 }  // namespace __asan
 
 // ---------------------- Interface ---------------- {{{1
 using namespace __asan;  // NOLINT
 
-// Register one global with a default redzone.
-void __asan_register_global(uptr addr, uptr size,
-                            const char *name) {
-  if (!flags()->report_globals) return;
-  ScopedLock lock(&mu_for_globals);
-  Global *g = (Global *)allocator_for_globals.Allocate(sizeof(Global));
-  g->beg = addr;
-  g->size = size;
-  g->size_with_redzone = GetAlignedSize(size) + kGlobalAndStackRedzone;
-  g->name = name;
-  RegisterGlobal(g);
-}
-
 // Register an array of globals.
 void __asan_register_globals(__asan_global *globals, uptr n) {
   if (!flags()->report_globals) return;
-  ScopedLock lock(&mu_for_globals);
+  BlockingMutexLock lock(&mu_for_globals);
   for (uptr i = 0; i < n; i++) {
     RegisterGlobal(&globals[i]);
   }
 }
 
 // Unregister an array of globals.
-// We must do it when a shared objects gets dlclosed.
+// We must do this when a shared objects gets dlclosed.
 void __asan_unregister_globals(__asan_global *globals, uptr n) {
   if (!flags()->report_globals) return;
-  ScopedLock lock(&mu_for_globals);
+  BlockingMutexLock lock(&mu_for_globals);
   for (uptr i = 0; i < n; i++) {
     UnregisterGlobal(&globals[i]);
   }
 }
+
+// This method runs immediately prior to dynamic initialization in each TU,
+// when all dynamically initialized globals are unpoisoned.  This method
+// poisons all global variables not defined in this TU, so that a dynamic
+// initializer can only touch global variables in the same TU.
+void __asan_before_dynamic_init(uptr first_addr, uptr last_addr) {
+  if (!flags()->check_initialization_order) return;
+  CHECK(list_of_dynamic_init_globals);
+  BlockingMutexLock lock(&mu_for_globals);
+  bool from_current_tu = false;
+  // The list looks like:
+  // a => ... => b => last_addr => ... => first_addr => c => ...
+  // The globals of the current TU reside between last_addr and first_addr.
+  for (ListOfGlobals *l = list_of_dynamic_init_globals; l; l = l->next) {
+    if (l->g->beg == last_addr)
+      from_current_tu = true;
+    if (!from_current_tu)
+      PoisonGlobalAndRedzones(l->g);
+    if (l->g->beg == first_addr)
+      from_current_tu = false;
+  }
+  CHECK(!from_current_tu);
+}
+
+// This method runs immediately after dynamic initialization in each TU, when
+// all dynamically initialized globals except for those defined in the current
+// TU are poisoned.  It simply unpoisons all dynamically initialized globals.
+void __asan_after_dynamic_init() {
+  if (!flags()->check_initialization_order) return;
+  BlockingMutexLock lock(&mu_for_globals);
+  for (ListOfGlobals *l = list_of_dynamic_init_globals; l; l = l->next)
+    UnpoisonGlobal(l->g);
+}
diff --git a/lib/asan/asan_intercepted_functions.h b/lib/asan/asan_intercepted_functions.h
new file mode 100644
index 000000000000..a1faf713c130
--- /dev/null
+++ b/lib/asan/asan_intercepted_functions.h
@@ -0,0 +1,260 @@
+//===-- asan_intercepted_functions.h ----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// ASan-private header containing prototypes for wrapper functions and wrappers
+//===----------------------------------------------------------------------===//
+#ifndef ASAN_INTERCEPTED_FUNCTIONS_H
+#define ASAN_INTERCEPTED_FUNCTIONS_H
+
+#include "asan_internal.h"
+#include "interception/interception.h"
+#include "sanitizer_common/sanitizer_platform_interceptors.h"
+
+#include <stdarg.h>
+
+using __sanitizer::uptr;
+
+// Use macro to describe if specific function should be
+// intercepted on a given platform.
+#if !defined(_WIN32)
+# define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 1
+# define ASAN_INTERCEPT__LONGJMP 1
+# define ASAN_INTERCEPT_STRDUP 1
+# define ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP 1
+# define ASAN_INTERCEPT_INDEX 1
+# define ASAN_INTERCEPT_PTHREAD_CREATE 1
+# define ASAN_INTERCEPT_MLOCKX 1
+#else
+# define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0
+# define ASAN_INTERCEPT__LONGJMP 0
+# define ASAN_INTERCEPT_STRDUP 0
+# define ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP 0
+# define ASAN_INTERCEPT_INDEX 0
+# define ASAN_INTERCEPT_PTHREAD_CREATE 0
+# define ASAN_INTERCEPT_MLOCKX 0
+#endif
+
+#if defined(__linux__)
+# define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1
+#else
+# define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0
+#endif
+
+#if !defined(__APPLE__)
+# define ASAN_INTERCEPT_STRNLEN 1
+#else
+# define ASAN_INTERCEPT_STRNLEN 0
+#endif
+
+#if defined(__linux__) && !defined(ANDROID)
+# define ASAN_INTERCEPT_SWAPCONTEXT 1
+#else
+# define ASAN_INTERCEPT_SWAPCONTEXT 0
+#endif
+
+#if !defined(ANDROID) && !defined(_WIN32)
+# define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1
+#else
+# define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 0
+#endif
+
+// On Darwin siglongjmp tailcalls longjmp, so we don't want to intercept it
+// there.
+#if !defined(_WIN32) && (!defined(__APPLE__) || MAC_INTERPOSE_FUNCTIONS)
+# define ASAN_INTERCEPT_SIGLONGJMP 1
+#else
+# define ASAN_INTERCEPT_SIGLONGJMP 0
+#endif
+
+#if ASAN_HAS_EXCEPTIONS && !defined(_WIN32)
+# define ASAN_INTERCEPT___CXA_THROW 1
+#else
+# define ASAN_INTERCEPT___CXA_THROW 0
+#endif
+
+#define DECLARE_FUNCTION_AND_WRAPPER(ret_type, func, ...) \
+  ret_type func(__VA_ARGS__); \
+  ret_type WRAP(func)(__VA_ARGS__)
+
+// Use extern declarations of intercepted functions on Mac and Windows
+// to avoid including system headers.
+#if defined(__APPLE__) || (defined(_WIN32) && !defined(_DLL))
+extern "C" {
+// signal.h
+# if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION
+struct sigaction;
+DECLARE_FUNCTION_AND_WRAPPER(int, sigaction, int sig,
+              const struct sigaction *act,
+              struct sigaction *oldact);
+DECLARE_FUNCTION_AND_WRAPPER(void*, signal, int signum, void *handler);
+# endif
+
+// setjmp.h
+DECLARE_FUNCTION_AND_WRAPPER(void, longjmp, void *env, int value);
+# if ASAN_INTERCEPT__LONGJMP
+DECLARE_FUNCTION_AND_WRAPPER(void, _longjmp, void *env, int value);
+# endif
+# if ASAN_INTERCEPT_SIGLONGJMP
+DECLARE_FUNCTION_AND_WRAPPER(void, siglongjmp, void *env, int value);
+# endif
+# if ASAN_INTERCEPT___CXA_THROW
+DECLARE_FUNCTION_AND_WRAPPER(void, __cxa_throw, void *a, void *b, void *c);
+#endif
+
+// string.h / strings.h
+DECLARE_FUNCTION_AND_WRAPPER(int, memcmp,
+                             const void *a1, const void *a2, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(void*, memmove,
+                             void *to, const void *from, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(void*, memcpy,
+                             void *to, const void *from, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(void*, memset, void *block, int c, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(char*, strchr, const char *str, int c);
+DECLARE_FUNCTION_AND_WRAPPER(char*, strcat,  /* NOLINT */
+                             char *to, const char* from);
+DECLARE_FUNCTION_AND_WRAPPER(char*, strncat,
+                             char *to, const char* from, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(char*, strcpy,  /* NOLINT */
+                             char *to, const char* from);
+DECLARE_FUNCTION_AND_WRAPPER(char*, strncpy,
+                             char *to, const char* from, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(int, strcmp, const char *s1, const char* s2);
+DECLARE_FUNCTION_AND_WRAPPER(int, strncmp,
+                             const char *s1, const char* s2, uptr size);
+DECLARE_FUNCTION_AND_WRAPPER(uptr, strlen, const char *s);
+# if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
+DECLARE_FUNCTION_AND_WRAPPER(int, strcasecmp, const char *s1, const char *s2);
+DECLARE_FUNCTION_AND_WRAPPER(int, strncasecmp,
+                             const char *s1, const char *s2, uptr n);
+# endif
+# if ASAN_INTERCEPT_STRDUP
+DECLARE_FUNCTION_AND_WRAPPER(char*, strdup, const char *s);
+# endif
+# if ASAN_INTERCEPT_STRNLEN
+DECLARE_FUNCTION_AND_WRAPPER(uptr, strnlen, const char *s, uptr maxlen);
+# endif
+#if ASAN_INTERCEPT_INDEX
+DECLARE_FUNCTION_AND_WRAPPER(char*, index, const char *string, int c);
+#endif
+
+// stdlib.h
+DECLARE_FUNCTION_AND_WRAPPER(int, atoi, const char *nptr);
+DECLARE_FUNCTION_AND_WRAPPER(long, atol, const char *nptr);  // NOLINT
+DECLARE_FUNCTION_AND_WRAPPER(long, strtol, const char *nptr, char **endptr, int base);  // NOLINT
+# if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
+DECLARE_FUNCTION_AND_WRAPPER(long long, atoll, const char *nptr);  // NOLINT
+DECLARE_FUNCTION_AND_WRAPPER(long long, strtoll, const char *nptr, char **endptr, int base);  // NOLINT
+# endif
+
+// unistd.h
+# if SANITIZER_INTERCEPT_READ
+DECLARE_FUNCTION_AND_WRAPPER(SSIZE_T, read, int fd, void *buf, SIZE_T count);
+# endif
+# if SANITIZER_INTERCEPT_PREAD
+DECLARE_FUNCTION_AND_WRAPPER(SSIZE_T, pread, int fd, void *buf,
+                             SIZE_T count, OFF_T offset);
+# endif
+# if SANITIZER_INTERCEPT_PREAD64
+DECLARE_FUNCTION_AND_WRAPPER(SSIZE_T, pread64, int fd, void *buf,
+                             SIZE_T count, OFF64_T offset);
+# endif
+
+#if SANITIZER_INTERCEPT_WRITE
+DECLARE_FUNCTION_AND_WRAPPER(SSIZE_T, write, int fd, void *ptr, SIZE_T count);
+#endif
+#if SANITIZER_INTERCEPT_PWRITE
+DECLARE_FUNCTION_AND_WRAPPER(SSIZE_T, pwrite, int fd, void *ptr, SIZE_T count);
+#endif
+
+# if ASAN_INTERCEPT_MLOCKX
+// mlock/munlock
+DECLARE_FUNCTION_AND_WRAPPER(int, mlock, const void *addr, SIZE_T len);
+DECLARE_FUNCTION_AND_WRAPPER(int, munlock, const void *addr, SIZE_T len);
+DECLARE_FUNCTION_AND_WRAPPER(int, mlockall, int flags);
+DECLARE_FUNCTION_AND_WRAPPER(int, munlockall, void);
+# endif
+
+// Windows threads.
+# if defined(_WIN32)
+__declspec(dllimport)
+void* __stdcall CreateThread(void *sec, uptr st, void* start,
+                             void *arg, DWORD fl, DWORD *id);
+# endif
+// Posix threads.
+# if ASAN_INTERCEPT_PTHREAD_CREATE
+DECLARE_FUNCTION_AND_WRAPPER(int, pthread_create,
+                             void *thread, void *attr,
+                             void *(*start_routine)(void*), void *arg);
+# endif
+
+#if defined(__APPLE__)
+typedef void* pthread_workqueue_t;
+typedef void* pthread_workitem_handle_t;
+
+typedef void* dispatch_group_t;
+typedef void* dispatch_queue_t;
+typedef void* dispatch_source_t;
+typedef u64 dispatch_time_t;
+typedef void (*dispatch_function_t)(void *block);
+typedef void* (*worker_t)(void *block);
+typedef void* CFStringRef;
+typedef void* CFAllocatorRef;
+
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_async_f,
+                             dispatch_queue_t dq,
+                             void *ctxt, dispatch_function_t func);
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_sync_f,
+                             dispatch_queue_t dq,
+                             void *ctxt, dispatch_function_t func);
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_after_f,
+                             dispatch_time_t when, dispatch_queue_t dq,
+                             void *ctxt, dispatch_function_t func);
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_barrier_async_f,
+                             dispatch_queue_t dq,
+                             void *ctxt, dispatch_function_t func);
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_group_async_f,
+                             dispatch_group_t group, dispatch_queue_t dq,
+                             void *ctxt, dispatch_function_t func);
+
+DECLARE_FUNCTION_AND_WRAPPER(void, __CFInitialize, void);
+DECLARE_FUNCTION_AND_WRAPPER(CFStringRef, CFStringCreateCopy,
+                             CFAllocatorRef alloc, CFStringRef str);
+DECLARE_FUNCTION_AND_WRAPPER(void, free, void* ptr);
+
+DECLARE_FUNCTION_AND_WRAPPER(int, vscanf, const char *format, va_list ap);
+DECLARE_FUNCTION_AND_WRAPPER(int, vsscanf, const char *str, const char *format,
+                             va_list ap);
+DECLARE_FUNCTION_AND_WRAPPER(int, vfscanf, void *stream, const char *format,
+                             va_list ap);
+DECLARE_FUNCTION_AND_WRAPPER(int, scanf, const char *format, ...);
+DECLARE_FUNCTION_AND_WRAPPER(int, fscanf,
+                             void* stream, const char *format, ...);
+DECLARE_FUNCTION_AND_WRAPPER(int, sscanf,  // NOLINT
+                             const char *str, const char *format, ...);
+
+#if MAC_INTERPOSE_FUNCTIONS && !defined(MISSING_BLOCKS_SUPPORT)
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_group_async,
+                             dispatch_group_t dg,
+                             dispatch_queue_t dq, void (^work)(void));
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_async,
+                             dispatch_queue_t dq, void (^work)(void));
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_after,
+                             dispatch_queue_t dq, void (^work)(void));
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_source_set_event_handler,
+                             dispatch_source_t ds, void (^work)(void));
+DECLARE_FUNCTION_AND_WRAPPER(void, dispatch_source_set_cancel_handler,
+                             dispatch_source_t ds, void (^work)(void));
+#endif  // MAC_INTERPOSE_FUNCTIONS
+#endif  // __APPLE__
+}  // extern "C"
+#endif
+
+#endif  // ASAN_INTERCEPTED_FUNCTIONS_H
diff --git a/lib/asan/asan_interceptors.cc b/lib/asan/asan_interceptors.cc
index 2ce5826e1495..6170974d6f5e 100644
--- a/lib/asan/asan_interceptors.cc
+++ b/lib/asan/asan_interceptors.cc
@@ -14,136 +14,33 @@
 #include "asan_interceptors.h"
 
 #include "asan_allocator.h"
-#include "asan_interface.h"
+#include "asan_intercepted_functions.h"
 #include "asan_internal.h"
 #include "asan_mapping.h"
+#include "asan_report.h"
 #include "asan_stack.h"
 #include "asan_stats.h"
 #include "asan_thread_registry.h"
 #include "interception/interception.h"
+#include "sanitizer/asan_interface.h"
 #include "sanitizer_common/sanitizer_libc.h"
 
-// Use macro to describe if specific function should be
-// intercepted on a given platform.
-#if !defined(_WIN32)
-# define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 1
-#else
-# define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0
-#endif
-
-#if !defined(__APPLE__)
-# define ASAN_INTERCEPT_STRNLEN 1
-#else
-# define ASAN_INTERCEPT_STRNLEN 0
-#endif
-
-#if defined(ANDROID) || defined(_WIN32)
-# define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 0
-#else
-# define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1
-#endif
-
-// Use extern declarations of intercepted functions on Mac and Windows
-// to avoid including system headers.
-#if defined(__APPLE__) || (defined(_WIN32) && !defined(_DLL))
-extern "C" {
-// signal.h
-# if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION
-struct sigaction;
-int sigaction(int sig, const struct sigaction *act,
-              struct sigaction *oldact);
-void *signal(int signum, void *handler);
-# endif
-
-// setjmp.h
-void longjmp(void* env, int value);
-# if !defined(_WIN32)
-void _longjmp(void *env, int value);
-# endif
-
-// string.h / strings.h
-int memcmp(const void *a1, const void *a2, uptr size);
-void* memmove(void *to, const void *from, uptr size);
-void* memcpy(void *to, const void *from, uptr size);
-void* memset(void *block, int c, uptr size);
-char* strchr(const char *str, int c);
-# if defined(__APPLE__)
-char* index(const char *string, int c);
-# endif
-char* strcat(char *to, const char* from);  // NOLINT
-char *strncat(char *to, const char* from, uptr size);
-char* strcpy(char *to, const char* from);  // NOLINT
-char* strncpy(char *to, const char* from, uptr size);
-int strcmp(const char *s1, const char* s2);
-int strncmp(const char *s1, const char* s2, uptr size);
-# if !defined(_WIN32)
-int strcasecmp(const char *s1, const char *s2);
-int strncasecmp(const char *s1, const char *s2, uptr n);
-char* strdup(const char *s);
-# endif
-uptr strlen(const char *s);
-# if ASAN_INTERCEPT_STRNLEN
-uptr strnlen(const char *s, uptr maxlen);
-# endif
-
-// stdlib.h
-int atoi(const char *nptr);
-long atol(const char *nptr);  // NOLINT
-long strtol(const char *nptr, char **endptr, int base);  // NOLINT
-# if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
-long long atoll(const char *nptr);  // NOLINT
-long long strtoll(const char *nptr, char **endptr, int base);  // NOLINT
-# endif
-
-// Windows threads.
-# if defined(_WIN32)
-__declspec(dllimport)
-void* __stdcall CreateThread(void *sec, uptr st, void* start,
-                             void *arg, DWORD fl, DWORD *id);
-# endif
-
-// Posix threads.
-# if !defined(_WIN32)
-int pthread_create(void *thread, void *attr, void *(*start_routine)(void*),
-                   void *arg);
-# endif
-}  // extern "C"
-#endif
-
 namespace __asan {
 
-// Instruments read/write access to a single byte in memory.
-// On error calls __asan_report_error, which aborts the program.
-#define ACCESS_ADDRESS(address, isWrite)   do {         \
-  if (!AddrIsInMem(address) || AddressIsPoisoned(address)) {                \
-    GET_CURRENT_PC_BP_SP;                               \
-    __asan_report_error(pc, bp, sp, address, isWrite, /* access_size */ 1); \
-  } \
-} while (0)
-
 // We implement ACCESS_MEMORY_RANGE, ASAN_READ_RANGE,
 // and ASAN_WRITE_RANGE as macro instead of function so
 // that no extra frames are created, and stack trace contains
 // relevant information only.
-
-// Instruments read/write access to a memory range.
-// More complex implementation is possible, for now just
-// checking the first and the last byte of a range.
-#define ACCESS_MEMORY_RANGE(offset, size, isWrite) do { \
-  if (size > 0) { \
-    uptr ptr = (uptr)(offset); \
-    ACCESS_ADDRESS(ptr, isWrite); \
-    ACCESS_ADDRESS(ptr + (size) - 1, isWrite); \
-  } \
+// We check all shadow bytes.
+#define ACCESS_MEMORY_RANGE(offset, size, isWrite) do {                  \
+  if (uptr __ptr = __asan_region_is_poisoned((uptr)(offset), size)) {    \
+    GET_CURRENT_PC_BP_SP;                                                \
+    __asan_report_error(pc, bp, sp, __ptr, isWrite, /* access_size */1); \
+  }                                                                      \
 } while (0)
 
-#define ASAN_READ_RANGE(offset, size) do { \
-  ACCESS_MEMORY_RANGE(offset, size, false); \
-} while (0)
-
-#define ASAN_WRITE_RANGE(offset, size) do { \
-  ACCESS_MEMORY_RANGE(offset, size, true); \
-} while (0)
+#define ASAN_READ_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, false)
+#define ASAN_WRITE_RANGE(offset, size) ACCESS_MEMORY_RANGE(offset, size, true);
 
 // Behavior of functions like "memcpy" or "strcpy" is undefined
 // if memory intervals overlap. We report error in this case.
@@ -156,11 +53,9 @@ static inline bool RangesOverlap(const char *offset1, uptr length1,
   const char *offset1 = (const char*)_offset1; \
   const char *offset2 = (const char*)_offset2; \
   if (RangesOverlap(offset1, length1, offset2, length2)) { \
-    AsanReport("ERROR: AddressSanitizer %s-param-overlap: " \
-               "memory ranges [%p,%p) and [%p, %p) overlap\n", \
-               name, offset1, offset1 + length1, offset2, offset2 + length2); \
-    PRINT_CURRENT_STACK(); \
-    ShowStatsAndAbort(); \
+    GET_STACK_TRACE_FATAL_HERE; \
+    ReportStringFunctionMemoryRangesOverlap(name, offset1, length1, \
+                                            offset2, length2, &stack); \
   } \
 } while (0)
 
@@ -180,27 +75,47 @@ static inline uptr MaybeRealStrnlen(const char *s, uptr maxlen) {
   return internal_strnlen(s, maxlen);
 }
 
+void SetThreadName(const char *name) {
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  if (t)
+    t->summary()->set_name(name);
+}
+
 }  // namespace __asan
 
 // ---------------------- Wrappers ---------------- {{{1
 using namespace __asan;  // NOLINT
 
+#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
+  ASAN_WRITE_RANGE(ptr, size)
+#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size)
+#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
+  do {                                           \
+    ctx = 0;                                     \
+    (void)ctx;                                   \
+    ENSURE_ASAN_INITED();                        \
+  } while (false)
+#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) do { } while (false)
+#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) do { } while (false)
+#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) SetThreadName(name)
+#include "sanitizer_common/sanitizer_common_interceptors.inc"
+
 static thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) {
   AsanThread *t = (AsanThread*)arg;
   asanThreadRegistry().SetCurrent(t);
   return t->ThreadStart();
 }
 
-#ifndef _WIN32
+#if ASAN_INTERCEPT_PTHREAD_CREATE
 INTERCEPTOR(int, pthread_create, void *thread,
     void *attr, void *(*start_routine)(void*), void *arg) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
+  GET_STACK_TRACE_THREAD;
   u32 current_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
   AsanThread *t = AsanThread::Create(current_tid, start_routine, arg, &stack);
   asanThreadRegistry().RegisterThread(t);
   return REAL(pthread_create)(thread, attr, asan_thread_start, t);
 }
-#endif  // !_WIN32
+#endif  // ASAN_INTERCEPT_PTHREAD_CREATE
 
 #if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION
 INTERCEPTOR(void*, signal, int signum, void *handler) {
@@ -223,28 +138,62 @@ DEFINE_REAL(int, sigaction, int signum, const struct sigaction *act,
     struct sigaction *oldact);
 #endif  // ASAN_INTERCEPT_SIGNAL_AND_SIGACTION
 
+#if ASAN_INTERCEPT_SWAPCONTEXT
+static void ClearShadowMemoryForContextStack(uptr stack, uptr ssize) {
+  // Align to page size.
+  uptr PageSize = GetPageSizeCached();
+  uptr bottom = stack & ~(PageSize - 1);
+  ssize += stack - bottom;
+  ssize = RoundUpTo(ssize, PageSize);
+  static const uptr kMaxSaneContextStackSize = 1 << 22;  // 4 Mb
+  if (ssize && ssize <= kMaxSaneContextStackSize) {
+    PoisonShadow(bottom, ssize, 0);
+  }
+}
+
+INTERCEPTOR(int, swapcontext, struct ucontext_t *oucp,
+            struct ucontext_t *ucp) {
+  static bool reported_warning = false;
+  if (!reported_warning) {
+    Report("WARNING: ASan doesn't fully support makecontext/swapcontext "
+           "functions and may produce false positives in some cases!\n");
+    reported_warning = true;
+  }
+  // Clear shadow memory for new context (it may share stack
+  // with current context).
+  uptr stack, ssize;
+  ReadContextStack(ucp, &stack, &ssize);
+  ClearShadowMemoryForContextStack(stack, ssize);
+  int res = REAL(swapcontext)(oucp, ucp);
+  // swapcontext technically does not return, but program may swap context to
+  // "oucp" later, that would look as if swapcontext() returned 0.
+  // We need to clear shadow for ucp once again, as it may be in arbitrary
+  // state.
+  ClearShadowMemoryForContextStack(stack, ssize);
+  return res;
+}
+#endif  // ASAN_INTERCEPT_SWAPCONTEXT
+
 INTERCEPTOR(void, longjmp, void *env, int val) {
   __asan_handle_no_return();
   REAL(longjmp)(env, val);
 }
 
-#if !defined(_WIN32)
+#if ASAN_INTERCEPT__LONGJMP
 INTERCEPTOR(void, _longjmp, void *env, int val) {
   __asan_handle_no_return();
   REAL(_longjmp)(env, val);
 }
+#endif
 
+#if ASAN_INTERCEPT_SIGLONGJMP
 INTERCEPTOR(void, siglongjmp, void *env, int val) {
   __asan_handle_no_return();
   REAL(siglongjmp)(env, val);
 }
 #endif
 
-#if ASAN_HAS_EXCEPTIONS == 1
-#ifdef __APPLE__
-extern "C" void __cxa_throw(void *a, void *b, void *c);
-#endif  // __APPLE__
-
+#if ASAN_INTERCEPT___CXA_THROW
 INTERCEPTOR(void, __cxa_throw, void *a, void *b, void *c) {
   CHECK(REAL(__cxa_throw));
   __asan_handle_no_return();
@@ -263,26 +212,22 @@ static void MlockIsUnsupported() {
 }
 
 extern "C" {
-INTERCEPTOR_ATTRIBUTE
-int mlock(const void *addr, uptr len) {
+INTERCEPTOR(int, mlock, const void *addr, uptr len) {
   MlockIsUnsupported();
   return 0;
 }
 
-INTERCEPTOR_ATTRIBUTE
-int munlock(const void *addr, uptr len) {
+INTERCEPTOR(int, munlock, const void *addr, uptr len) {
   MlockIsUnsupported();
   return 0;
 }
 
-INTERCEPTOR_ATTRIBUTE
-int mlockall(int flags) {
+INTERCEPTOR(int, mlockall, int flags) {
   MlockIsUnsupported();
   return 0;
 }
 
-INTERCEPTOR_ATTRIBUTE
-int munlockall(void) {
+INTERCEPTOR(int, munlockall, void) {
   MlockIsUnsupported();
   return 0;
 }
@@ -299,6 +244,7 @@ static inline int CharCaseCmp(unsigned char c1, unsigned char c2) {
 }
 
 INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
+  if (!asan_inited) return internal_memcmp(a1, a2, size);
   ENSURE_ASAN_INITED();
   unsigned char c1 = 0, c2 = 0;
   const unsigned char *s1 = (const unsigned char*)a1;
@@ -315,6 +261,7 @@ INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
 }
 
 INTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) {
+  if (!asan_inited) return internal_memcpy(to, from, size);
   // memcpy is called during __asan_init() from the internals
   // of printf(...).
   if (asan_init_is_running) {
@@ -327,25 +274,39 @@ INTERCEPTOR(void*, memcpy, void *to, const void *from, uptr size) {
       // See http://llvm.org/bugs/show_bug.cgi?id=11763.
       CHECK_RANGES_OVERLAP("memcpy", to, size, from, size);
     }
-    ASAN_WRITE_RANGE(from, size);
-    ASAN_READ_RANGE(to, size);
+    ASAN_READ_RANGE(from, size);
+    ASAN_WRITE_RANGE(to, size);
   }
+#if MAC_INTERPOSE_FUNCTIONS
+  // Interposing of resolver functions is broken on Mac OS 10.7 and 10.8.
+  // See also http://code.google.com/p/address-sanitizer/issues/detail?id=116.
+  return internal_memcpy(to, from, size);
+#else
   return REAL(memcpy)(to, from, size);
+#endif
 }
 
 INTERCEPTOR(void*, memmove, void *to, const void *from, uptr size) {
+  if (!asan_inited) return internal_memmove(to, from, size);
   if (asan_init_is_running) {
     return REAL(memmove)(to, from, size);
   }
   ENSURE_ASAN_INITED();
   if (flags()->replace_intrin) {
-    ASAN_WRITE_RANGE(from, size);
-    ASAN_READ_RANGE(to, size);
+    ASAN_READ_RANGE(from, size);
+    ASAN_WRITE_RANGE(to, size);
   }
+#if MAC_INTERPOSE_FUNCTIONS
+  // Interposing of resolver functions is broken on Mac OS 10.7 and 10.8.
+  // See also http://code.google.com/p/address-sanitizer/issues/detail?id=116.
+  return internal_memmove(to, from, size);
+#else
   return REAL(memmove)(to, from, size);
+#endif
 }
 
 INTERCEPTOR(void*, memset, void *block, int c, uptr size) {
+  if (!asan_inited) return internal_memset(block, c, size);
   // memset is called inside Printf.
   if (asan_init_is_running) {
     return REAL(memset)(block, c, size);
@@ -358,6 +319,12 @@ INTERCEPTOR(void*, memset, void *block, int c, uptr size) {
 }
 
 INTERCEPTOR(char*, strchr, const char *str, int c) {
+  if (!asan_inited) return internal_strchr(str, c);
+  // strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is
+  // used.
+  if (asan_init_is_running) {
+    return REAL(strchr)(str, c);
+  }
   ENSURE_ASAN_INITED();
   char *result = REAL(strchr)(str, c);
   if (flags()->replace_str) {
@@ -367,37 +334,31 @@ INTERCEPTOR(char*, strchr, const char *str, int c) {
   return result;
 }
 
-#ifdef __linux__
+#if ASAN_INTERCEPT_INDEX
+# if ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX
 INTERCEPTOR(char*, index, const char *string, int c)
   ALIAS(WRAPPER_NAME(strchr));
-#else
+# else
 DEFINE_REAL(char*, index, const char *string, int c)
-#endif
-
-INTERCEPTOR(int, strcasecmp, const char *s1, const char *s2) {
-  ENSURE_ASAN_INITED();
-  unsigned char c1, c2;
-  uptr i;
-  for (i = 0; ; i++) {
-    c1 = (unsigned char)s1[i];
-    c2 = (unsigned char)s2[i];
-    if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break;
-  }
-  ASAN_READ_RANGE(s1, i + 1);
-  ASAN_READ_RANGE(s2, i + 1);
-  return CharCaseCmp(c1, c2);
-}
+# endif
+#endif  // ASAN_INTERCEPT_INDEX
 
+// For both strcat() and strncat() we need to check the validity of |to|
+// argument irrespective of the |from| length.
 INTERCEPTOR(char*, strcat, char *to, const char *from) {  // NOLINT
   ENSURE_ASAN_INITED();
   if (flags()->replace_str) {
     uptr from_length = REAL(strlen)(from);
     ASAN_READ_RANGE(from, from_length + 1);
+    uptr to_length = REAL(strlen)(to);
+    ASAN_READ_RANGE(to, to_length);
+    ASAN_WRITE_RANGE(to + to_length, from_length + 1);
+    // If the copying actually happens, the |from| string should not overlap
+    // with the resulting string starting at |to|, which has a length of
+    // to_length + from_length + 1.
     if (from_length > 0) {
-      uptr to_length = REAL(strlen)(to);
-      ASAN_READ_RANGE(to, to_length);
-      ASAN_WRITE_RANGE(to + to_length, from_length + 1);
-      CHECK_RANGES_OVERLAP("strcat", to, to_length + 1, from, from_length + 1);
+      CHECK_RANGES_OVERLAP("strcat", to, from_length + to_length + 1,
+                           from, from_length + 1);
     }
   }
   return REAL(strcat)(to, from);  // NOLINT
@@ -405,23 +366,25 @@ INTERCEPTOR(char*, strcat, char *to, const char *from) {  // NOLINT
 
 INTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) {
   ENSURE_ASAN_INITED();
-  if (flags()->replace_str && size > 0) {
+  if (flags()->replace_str) {
     uptr from_length = MaybeRealStrnlen(from, size);
-    ASAN_READ_RANGE(from, Min(size, from_length + 1));
+    uptr copy_length = Min(size, from_length + 1);
+    ASAN_READ_RANGE(from, copy_length);
     uptr to_length = REAL(strlen)(to);
     ASAN_READ_RANGE(to, to_length);
     ASAN_WRITE_RANGE(to + to_length, from_length + 1);
     if (from_length > 0) {
-      CHECK_RANGES_OVERLAP("strncat", to, to_length + 1,
-                           from, Min(size, from_length + 1));
+      CHECK_RANGES_OVERLAP("strncat", to, to_length + copy_length + 1,
+                           from, copy_length);
     }
   }
   return REAL(strncat)(to, from, size);
 }
 
 INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
-  if (!asan_inited) {
-    return internal_strcmp(s1, s2);
+  if (!asan_inited) return internal_strcmp(s1, s2);
+  if (asan_init_is_running) {
+    return REAL(strcmp)(s1, s2);
   }
   ENSURE_ASAN_INITED();
   unsigned char c1, c2;
@@ -437,6 +400,9 @@ INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
 }
 
 INTERCEPTOR(char*, strcpy, char *to, const char *from) {  // NOLINT
+#if MAC_INTERPOSE_FUNCTIONS
+  if (!asan_inited) return REAL(strcpy)(to, from);  // NOLINT
+#endif
   // strcpy is called from malloc_default_purgeable_zone()
   // in __asan::ReplaceSystemAlloc() on Mac.
   if (asan_init_is_running) {
@@ -452,7 +418,17 @@ INTERCEPTOR(char*, strcpy, char *to, const char *from) {  // NOLINT
   return REAL(strcpy)(to, from);  // NOLINT
 }
 
+#if ASAN_INTERCEPT_STRDUP
 INTERCEPTOR(char*, strdup, const char *s) {
+#if MAC_INTERPOSE_FUNCTIONS
+  // FIXME: because internal_strdup() uses InternalAlloc(), which currently
+  // just calls malloc() on Mac, we can't use internal_strdup() with the
+  // dynamic runtime. We can remove the call to REAL(strdup) once InternalAlloc
+  // starts using mmap() instead.
+  // See also http://code.google.com/p/address-sanitizer/issues/detail?id=123.
+  if (!asan_inited) return REAL(strdup)(s);
+#endif
+  if (!asan_inited) return internal_strdup(s);
   ENSURE_ASAN_INITED();
   if (flags()->replace_str) {
     uptr length = REAL(strlen)(s);
@@ -460,8 +436,10 @@ INTERCEPTOR(char*, strdup, const char *s) {
   }
   return REAL(strdup)(s);
 }
+#endif
 
 INTERCEPTOR(uptr, strlen, const char *s) {
+  if (!asan_inited) return internal_strlen(s);
   // strlen is called from malloc_default_purgeable_zone()
   // in __asan::ReplaceSystemAlloc() on Mac.
   if (asan_init_is_running) {
@@ -475,6 +453,21 @@ INTERCEPTOR(uptr, strlen, const char *s) {
   return length;
 }
 
+#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
+INTERCEPTOR(int, strcasecmp, const char *s1, const char *s2) {
+  ENSURE_ASAN_INITED();
+  unsigned char c1, c2;
+  uptr i;
+  for (i = 0; ; i++) {
+    c1 = (unsigned char)s1[i];
+    c2 = (unsigned char)s2[i];
+    if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break;
+  }
+  ASAN_READ_RANGE(s1, i + 1);
+  ASAN_READ_RANGE(s2, i + 1);
+  return CharCaseCmp(c1, c2);
+}
+
 INTERCEPTOR(int, strncasecmp, const char *s1, const char *s2, uptr n) {
   ENSURE_ASAN_INITED();
   unsigned char c1 = 0, c2 = 0;
@@ -488,8 +481,10 @@ INTERCEPTOR(int, strncasecmp, const char *s1, const char *s2, uptr n) {
   ASAN_READ_RANGE(s2, Min(i + 1, n));
   return CharCaseCmp(c1, c2);
 }
+#endif  // ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
 
 INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr size) {
+  if (!asan_inited) return internal_strncmp(s1, s2, size);
   // strncmp is called from malloc_default_purgeable_zone()
   // in __asan::ReplaceSystemAlloc() on Mac.
   if (asan_init_is_running) {
@@ -566,6 +561,9 @@ INTERCEPTOR(long, strtol, const char *nptr,  // NOLINT
 }
 
 INTERCEPTOR(int, atoi, const char *nptr) {
+#if MAC_INTERPOSE_FUNCTIONS
+  if (!asan_inited) return REAL(atoi)(nptr);
+#endif
   ENSURE_ASAN_INITED();
   if (!flags()->replace_str) {
     return REAL(atoi)(nptr);
@@ -582,6 +580,9 @@ INTERCEPTOR(int, atoi, const char *nptr) {
 }
 
 INTERCEPTOR(long, atol, const char *nptr) {  // NOLINT
+#if MAC_INTERPOSE_FUNCTIONS
+  if (!asan_inited) return REAL(atol)(nptr);
+#endif
   ENSURE_ASAN_INITED();
   if (!flags()->replace_str) {
     return REAL(atol)(nptr);
@@ -638,7 +639,7 @@ INTERCEPTOR_WINAPI(DWORD, CreateThread,
                    void* security, uptr stack_size,
                    DWORD (__stdcall *start_routine)(void*), void* arg,
                    DWORD flags, void* tid) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
+  GET_STACK_TRACE_THREAD;
   u32 current_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
   AsanThread *t = AsanThread::Create(current_tid, start_routine, arg, &stack);
   asanThreadRegistry().RegisterThread(t);
@@ -660,6 +661,12 @@ void InitializeAsanInterceptors() {
   static bool was_called_once;
   CHECK(was_called_once == false);
   was_called_once = true;
+#if MAC_INTERPOSE_FUNCTIONS
+  return;
+#endif
+
+  SANITIZER_COMMON_INTERCEPTORS_INIT;
+
   // Intercept mem* functions.
   ASAN_INTERCEPT_FUNC(memcmp);
   ASAN_INTERCEPT_FUNC(memmove);
@@ -667,7 +674,11 @@ void InitializeAsanInterceptors() {
   if (PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE) {
     ASAN_INTERCEPT_FUNC(memcpy);
   } else {
-    REAL(memcpy) = REAL(memmove);
+#if !MAC_INTERPOSE_FUNCTIONS
+    // If we're using dynamic interceptors on Mac, these two are just plain
+    // functions.
+    internal_memcpy(&REAL(memcpy), &REAL(memmove), sizeof(REAL(memmove)));
+#endif
   }
 
   // Intercept str* functions.
@@ -679,19 +690,23 @@ void InitializeAsanInterceptors() {
   ASAN_INTERCEPT_FUNC(strncat);
   ASAN_INTERCEPT_FUNC(strncmp);
   ASAN_INTERCEPT_FUNC(strncpy);
-#if !defined(_WIN32)
+#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
   ASAN_INTERCEPT_FUNC(strcasecmp);
-  ASAN_INTERCEPT_FUNC(strdup);
   ASAN_INTERCEPT_FUNC(strncasecmp);
-# ifndef __APPLE__
+#endif
+#if ASAN_INTERCEPT_STRDUP
+  ASAN_INTERCEPT_FUNC(strdup);
+#endif
+#if ASAN_INTERCEPT_STRNLEN
+  ASAN_INTERCEPT_FUNC(strnlen);
+#endif
+#if ASAN_INTERCEPT_INDEX
+# if ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX
   ASAN_INTERCEPT_FUNC(index);
 # else
   CHECK(OVERRIDE_FUNCTION(index, WRAP(strchr)));
 # endif
 #endif
-#if ASAN_INTERCEPT_STRNLEN
-  ASAN_INTERCEPT_FUNC(strnlen);
-#endif
 
   ASAN_INTERCEPT_FUNC(atoi);
   ASAN_INTERCEPT_FUNC(atol);
@@ -701,25 +716,37 @@ void InitializeAsanInterceptors() {
   ASAN_INTERCEPT_FUNC(strtoll);
 #endif
 
+#if ASAN_INTERCEPT_MLOCKX
+  // Intercept mlock/munlock.
+  ASAN_INTERCEPT_FUNC(mlock);
+  ASAN_INTERCEPT_FUNC(munlock);
+  ASAN_INTERCEPT_FUNC(mlockall);
+  ASAN_INTERCEPT_FUNC(munlockall);
+#endif
+
   // Intecept signal- and jump-related functions.
   ASAN_INTERCEPT_FUNC(longjmp);
 #if ASAN_INTERCEPT_SIGNAL_AND_SIGACTION
   ASAN_INTERCEPT_FUNC(sigaction);
   ASAN_INTERCEPT_FUNC(signal);
 #endif
-
-#if !defined(_WIN32)
+#if ASAN_INTERCEPT_SWAPCONTEXT
+  ASAN_INTERCEPT_FUNC(swapcontext);
+#endif
+#if ASAN_INTERCEPT__LONGJMP
   ASAN_INTERCEPT_FUNC(_longjmp);
-  INTERCEPT_FUNCTION(__cxa_throw);
-# if !defined(__APPLE__)
-  // On Darwin siglongjmp tailcalls longjmp, so we don't want to intercept it
-  // there.
+#endif
+#if ASAN_INTERCEPT_SIGLONGJMP
   ASAN_INTERCEPT_FUNC(siglongjmp);
-# endif
+#endif
+
+  // Intercept exception handling functions.
+#if ASAN_INTERCEPT___CXA_THROW
+  INTERCEPT_FUNCTION(__cxa_throw);
 #endif
 
   // Intercept threading-related functions
-#if !defined(_WIN32)
+#if ASAN_INTERCEPT_PTHREAD_CREATE
   ASAN_INTERCEPT_FUNC(pthread_create);
 #endif
 
diff --git a/lib/asan/asan_interceptors.h b/lib/asan/asan_interceptors.h
index 32816920f7a3..3b3e90ef93ff 100644
--- a/lib/asan/asan_interceptors.h
+++ b/lib/asan/asan_interceptors.h
@@ -24,6 +24,7 @@ DECLARE_REAL(char*, strchr, const char *str, int c)
 DECLARE_REAL(uptr, strlen, const char *s)
 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
+DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
 struct sigaction;
 DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act,
                              struct sigaction *oldact)
diff --git a/lib/asan/asan_internal.h b/lib/asan/asan_internal.h
index 8c1f32028f2c..5d3bffa814da 100644
--- a/lib/asan/asan_internal.h
+++ b/lib/asan/asan_internal.h
@@ -17,17 +17,13 @@
 #include "asan_flags.h"
 #include "sanitizer_common/sanitizer_common.h"
 #include "sanitizer_common/sanitizer_internal_defs.h"
+#include "sanitizer_common/sanitizer_stacktrace.h"
 #include "sanitizer_common/sanitizer_libc.h"
 
 #if !defined(__linux__) && !defined(__APPLE__) && !defined(_WIN32)
 # error "This operating system is not supported by AddressSanitizer"
 #endif
 
-#if defined(_WIN32)
-extern "C" void* _ReturnAddress(void);
-# pragma intrinsic(_ReturnAddress)
-#endif  // defined(_WIN32)
-
 #define ASAN_DEFAULT_FAILURE_EXITCODE 1
 
 #if defined(__linux__)
@@ -48,6 +44,13 @@ extern "C" void* _ReturnAddress(void);
 # define ASAN_WINDOWS 0
 #endif
 
+#if defined(__ANDROID__) || defined(ANDROID)
+# define ASAN_ANDROID 1
+#else
+# define ASAN_ANDROID 0
+#endif
+
+
 #define ASAN_POSIX (ASAN_LINUX || ASAN_MAC)
 
 #if __has_feature(address_sanitizer)
@@ -59,7 +62,11 @@ extern "C" void* _ReturnAddress(void);
 
 // If set, asan will install its own SEGV signal handler.
 #ifndef ASAN_NEEDS_SEGV
-# define ASAN_NEEDS_SEGV 1
+# if ASAN_ANDROID == 1
+#  define ASAN_NEEDS_SEGV 0
+# else
+#  define ASAN_NEEDS_SEGV 1
+# endif
 #endif
 
 // If set, asan will intercept C++ exception api call(s).
@@ -76,7 +83,11 @@ extern "C" void* _ReturnAddress(void);
 // If set, values like allocator chunk size, as well as defaults for some flags
 // will be changed towards less memory overhead.
 #ifndef ASAN_LOW_MEMORY
-# define ASAN_LOW_MEMORY 0
+#if SANITIZER_WORDSIZE == 32
+#  define ASAN_LOW_MEMORY 1
+#else
+#  define ASAN_LOW_MEMORY 0
+# endif
 #endif
 
 // All internal functions in asan reside inside the __asan namespace
@@ -86,14 +97,11 @@ extern "C" void* _ReturnAddress(void);
 namespace __asan {
 
 class AsanThread;
-struct AsanStackTrace;
+using __sanitizer::StackTrace;
 
 // asan_rtl.cc
 void NORETURN ShowStatsAndAbort();
 
-// asan_globals.cc
-bool DescribeAddrIfGlobal(uptr addr);
-
 void ReplaceOperatorsNewAndDelete();
 // asan_malloc_linux.cc / asan_malloc_mac.cc
 void ReplaceSystemMalloc();
@@ -103,10 +111,12 @@ void *AsanDoesNotSupportStaticLinkage();
 
 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp);
 
+void MaybeReexec();
 bool AsanInterceptsSignal(int signum);
 void SetAlternateSignalStack();
 void UnsetAlternateSignalStack();
 void InstallSignalHandlers();
+void ReadContextStack(void *context, uptr *stack, uptr *ssize);
 void AsanPlatformThreadInit();
 
 // Wrapper for TLS/TSD.
@@ -115,9 +125,6 @@ void *AsanTSDGet();
 void AsanTSDSet(void *tsd);
 
 void AppendToErrorMessageBuffer(const char *buffer);
-// asan_printf.cc
-void AsanPrintf(const char *format, ...);
-void AsanReport(const char *format, ...);
 
 // asan_poisoning.cc
 // Poisons the shadow memory for "size" bytes starting from "addr".
@@ -138,33 +145,20 @@ bool PlatformHasDifferentMemcpyAndMemmove();
 # define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE true
 #endif  // __APPLE__
 
+// Add convenient macro for interface functions that may be represented as
+// weak hooks.
+#define ASAN_MALLOC_HOOK(ptr, size) \
+  if (&__asan_malloc_hook) __asan_malloc_hook(ptr, size)
+#define ASAN_FREE_HOOK(ptr) \
+  if (&__asan_free_hook) __asan_free_hook(ptr)
+#define ASAN_ON_ERROR() \
+  if (&__asan_on_error) __asan_on_error()
+
 extern int asan_inited;
 // Used to avoid infinite recursion in __asan_init().
 extern bool asan_init_is_running;
 extern void (*death_callback)(void);
 
-enum LinkerInitialized { LINKER_INITIALIZED = 0 };
-
-#define ASAN_ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
-
-#if !defined(_WIN32) || defined(__clang__)
-# define GET_CALLER_PC() (uptr)__builtin_return_address(0)
-# define GET_CURRENT_FRAME() (uptr)__builtin_frame_address(0)
-#else
-# define GET_CALLER_PC() (uptr)_ReturnAddress()
-// CaptureStackBackTrace doesn't need to know BP on Windows.
-// FIXME: This macro is still used when printing error reports though it's not
-// clear if the BP value is needed in the ASan reports on Windows.
-# define GET_CURRENT_FRAME() (uptr)0xDEADBEEF
-#endif
-
-#ifdef _WIN32
-# ifndef ASAN_USE_EXTERNAL_SYMBOLIZER
-#  define ASAN_USE_EXTERNAL_SYMBOLIZER __asan_WinSymbolize
-bool __asan_WinSymbolize(const void *addr, char *out_buffer, int buffer_size);
-# endif
-#endif  // _WIN32
-
 // These magic values are written to shadow for better error reporting.
 const int kAsanHeapLeftRedzoneMagic = 0xfa;
 const int kAsanHeapRightRedzoneMagic = 0xfb;
@@ -174,26 +168,15 @@ const int kAsanStackMidRedzoneMagic = 0xf2;
 const int kAsanStackRightRedzoneMagic = 0xf3;
 const int kAsanStackPartialRedzoneMagic = 0xf4;
 const int kAsanStackAfterReturnMagic = 0xf5;
+const int kAsanInitializationOrderMagic = 0xf6;
 const int kAsanUserPoisonedMemoryMagic = 0xf7;
+const int kAsanStackUseAfterScopeMagic = 0xf8;
 const int kAsanGlobalRedzoneMagic = 0xf9;
 const int kAsanInternalHeapMagic = 0xfe;
 
 static const uptr kCurrentStackFrameMagic = 0x41B58AB3;
 static const uptr kRetiredStackFrameMagic = 0x45E0360E;
 
-// -------------------------- LowLevelAllocator ----- {{{1
-// A simple low-level memory allocator for internal use.
-class LowLevelAllocator {
- public:
-  explicit LowLevelAllocator(LinkerInitialized) {}
-  // 'size' must be a power of two.
-  // Requires an external lock.
-  void *Allocate(uptr size);
- private:
-  char *allocated_end_;
-  char *allocated_current_;
-};
-
 }  // namespace __asan
 
 #endif  // ASAN_INTERNAL_H
diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
index 9a3d6bdb15a6..845493de0956 100644
--- a/lib/asan/asan_linux.cc
+++ b/lib/asan/asan_linux.cc
@@ -15,8 +15,8 @@
 
 #include "asan_interceptors.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_thread.h"
+#include "asan_thread_registry.h"
 #include "sanitizer_common/sanitizer_libc.h"
 #include "sanitizer_common/sanitizer_procmaps.h"
 
@@ -31,7 +31,7 @@
 #include <unistd.h>
 #include <unwind.h>
 
-#ifndef ANDROID
+#if !ASAN_ANDROID
 // FIXME: where to get ucontext on Android?
 #include <sys/ucontext.h>
 #endif
@@ -40,13 +40,17 @@ extern "C" void* _DYNAMIC;
 
 namespace __asan {
 
+void MaybeReexec() {
+  // No need to re-exec on Linux.
+}
+
 void *AsanDoesNotSupportStaticLinkage() {
   // This will fail to link with -static.
   return &_DYNAMIC;  // defined in link.h
 }
 
 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
-#ifdef ANDROID
+#if ASAN_ANDROID
   *pc = *sp = *bp = 0;
 #elif defined(__arm__)
   ucontext_t *ucontext = (ucontext_t*)context;
@@ -63,6 +67,27 @@ void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
   *pc = ucontext->uc_mcontext.gregs[REG_EIP];
   *bp = ucontext->uc_mcontext.gregs[REG_EBP];
   *sp = ucontext->uc_mcontext.gregs[REG_ESP];
+# elif defined(__powerpc__) || defined(__powerpc64__)
+  ucontext_t *ucontext = (ucontext_t*)context;
+  *pc = ucontext->uc_mcontext.regs->nip;
+  *sp = ucontext->uc_mcontext.regs->gpr[PT_R1];
+  // The powerpc{,64}-linux ABIs do not specify r31 as the frame
+  // pointer, but GCC always uses r31 when we need a frame pointer.
+  *bp = ucontext->uc_mcontext.regs->gpr[PT_R31];
+# elif defined(__sparc__)
+  ucontext_t *ucontext = (ucontext_t*)context;
+  uptr *stk_ptr;
+# if defined (__arch64__)
+  *pc = ucontext->uc_mcontext.mc_gregs[MC_PC];
+  *sp = ucontext->uc_mcontext.mc_gregs[MC_O6];
+  stk_ptr = (uptr *) (*sp + 2047);
+  *bp = stk_ptr[15];
+# else
+  *pc = ucontext->uc_mcontext.gregs[REG_PC];
+  *sp = ucontext->uc_mcontext.gregs[REG_O6];
+  stk_ptr = (uptr *) *sp;
+  *bp = stk_ptr[15];
+# endif
 #else
 # error "Unsupported arch"
 #endif
@@ -76,69 +101,35 @@ void AsanPlatformThreadInit() {
   // Nothing here for now.
 }
 
-AsanLock::AsanLock(LinkerInitialized) {
-  // We assume that pthread_mutex_t initialized to all zeroes is a valid
-  // unlocked mutex. We can not use PTHREAD_MUTEX_INITIALIZER as it triggers
-  // a gcc warning:
-  // extended initializer lists only available with -std=c++0x or -std=gnu++0x
-}
-
-void AsanLock::Lock() {
-  CHECK(sizeof(pthread_mutex_t) <= sizeof(opaque_storage_));
-  pthread_mutex_lock((pthread_mutex_t*)&opaque_storage_);
-  CHECK(!owner_);
-  owner_ = (uptr)pthread_self();
-}
-
-void AsanLock::Unlock() {
-  CHECK(owner_ == (uptr)pthread_self());
-  owner_ = 0;
-  pthread_mutex_unlock((pthread_mutex_t*)&opaque_storage_);
-}
-
-#ifdef __arm__
-#define UNWIND_STOP _URC_END_OF_STACK
-#define UNWIND_CONTINUE _URC_NO_REASON
-#else
-#define UNWIND_STOP _URC_NORMAL_STOP
-#define UNWIND_CONTINUE _URC_NO_REASON
-#endif
-
-uptr Unwind_GetIP(struct _Unwind_Context *ctx) {
-#ifdef __arm__
-  uptr val;
-  _Unwind_VRS_Result res = _Unwind_VRS_Get(ctx, _UVRSC_CORE,
-      15 /* r15 = PC */, _UVRSD_UINT32, &val);
-  CHECK(res == _UVRSR_OK && "_Unwind_VRS_Get failed");
-  // Clear the Thumb bit.
-  return val & ~(uptr)1;
-#else
-  return _Unwind_GetIP(ctx);
+void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, bool fast) {
+#if defined(__arm__) || \
+    defined(__powerpc__) || defined(__powerpc64__) || \
+    defined(__sparc__)
+  fast = false;
 #endif
+  if (!fast)
+    return stack->SlowUnwindStack(pc, max_s);
+  stack->size = 0;
+  stack->trace[0] = pc;
+  if (max_s > 1) {
+    stack->max_size = max_s;
+    if (!asan_inited) return;
+    if (AsanThread *t = asanThreadRegistry().GetCurrent())
+      stack->FastUnwindStack(pc, bp, t->stack_top(), t->stack_bottom());
+  }
 }
 
-_Unwind_Reason_Code Unwind_Trace(struct _Unwind_Context *ctx,
-    void *param) {
-  AsanStackTrace *b = (AsanStackTrace*)param;
-  CHECK(b->size < b->max_size);
-  uptr pc = Unwind_GetIP(ctx);
-  b->trace[b->size++] = pc;
-  if (b->size == b->max_size) return UNWIND_STOP;
-  return UNWIND_CONTINUE;
+#if !ASAN_ANDROID
+void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
+  ucontext_t *ucp = (ucontext_t*)context;
+  *stack = (uptr)ucp->uc_stack.ss_sp;
+  *ssize = ucp->uc_stack.ss_size;
 }
-
-void AsanStackTrace::GetStackTrace(uptr max_s, uptr pc, uptr bp) {
-  size = 0;
-  trace[0] = pc;
-  if ((max_s) > 1) {
-    max_size = max_s;
-#ifdef __arm__
-    _Unwind_Backtrace(Unwind_Trace, this);
 #else
-     FastUnwindStack(pc, bp);
-#endif
-  }
+void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
+  UNIMPLEMENTED();
 }
+#endif
 
 }  // namespace __asan
 
diff --git a/lib/asan/asan_lock.h b/lib/asan/asan_lock.h
index edee49adf6a7..e69de29bb2d1 100644
--- a/lib/asan/asan_lock.h
+++ b/lib/asan/asan_lock.h
@@ -1,42 +0,0 @@
-//===-- asan_lock.h ---------------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
-// A wrapper for a simple lock.
-//===----------------------------------------------------------------------===//
-#ifndef ASAN_LOCK_H
-#define ASAN_LOCK_H
-
-#include "sanitizer_common/sanitizer_mutex.h"
-#include "asan_internal.h"
-
-// The locks in ASan are global objects and they are never destroyed to avoid
-// at-exit races (that is, a lock is being used by other threads while the main
-// thread is doing atexit destructors).
-// We define the class using opaque storage to avoid including system headers.
-
-namespace __asan {
-
-class AsanLock {
- public:
-  explicit AsanLock(LinkerInitialized);
-  void Lock();
-  void Unlock();
-  bool IsLocked() { return owner_ != 0; }
- private:
-  uptr opaque_storage_[10];
-  uptr owner_;  // for debugging and for malloc_introspection_t interface
-};
-
-typedef GenericScopedLock<AsanLock> ScopedLock;
-
-}  // namespace __asan
-
-#endif  // ASAN_LOCK_H
diff --git a/lib/asan/asan_mac.cc b/lib/asan/asan_mac.cc
index a3d39e7ae05c..3ed9e06eeb6f 100644
--- a/lib/asan/asan_mac.cc
+++ b/lib/asan/asan_mac.cc
@@ -23,7 +23,8 @@
 #include "asan_thread_registry.h"
 #include "sanitizer_common/sanitizer_libc.h"
 
-#include <crt_externs.h>  // for _NSGetEnviron
+#include <crt_externs.h>  // for _NSGetArgv
+#include <dlfcn.h>  // for dladdr()
 #include <mach-o/dyld.h>
 #include <mach-o/loader.h>
 #include <sys/mman.h>
@@ -41,7 +42,7 @@ namespace __asan {
 
 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
   ucontext_t *ucontext = (ucontext_t*)context;
-# if __WORDSIZE == 64
+# if SANITIZER_WORDSIZE == 64
   *pc = ucontext->uc_mcontext->__ss.__rip;
   *bp = ucontext->uc_mcontext->__ss.__rbp;
   *sp = ucontext->uc_mcontext->__ss.__rsp;
@@ -49,7 +50,7 @@ void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
   *pc = ucontext->uc_mcontext->__ss.__eip;
   *bp = ucontext->uc_mcontext->__ss.__ebp;
   *sp = ucontext->uc_mcontext->__ss.__esp;
-# endif  // __WORDSIZE
+# endif  // SANITIZER_WORDSIZE
 }
 
 int GetMacosVersion() {
@@ -67,6 +68,7 @@ int GetMacosVersion() {
       switch (version[1]) {
         case '0': return MACOS_VERSION_SNOW_LEOPARD;
         case '1': return MACOS_VERSION_LION;
+        case '2': return MACOS_VERSION_MOUNTAIN_LION;
         default: return MACOS_VERSION_UNKNOWN;
       }
     }
@@ -83,6 +85,42 @@ bool PlatformHasDifferentMemcpyAndMemmove() {
   return GetMacosVersion() == MACOS_VERSION_SNOW_LEOPARD;
 }
 
+extern "C"
+void __asan_init();
+
+static const char kDyldInsertLibraries[] = "DYLD_INSERT_LIBRARIES";
+
+void MaybeReexec() {
+  if (!flags()->allow_reexec) return;
+#if MAC_INTERPOSE_FUNCTIONS
+  // If the program is linked with the dynamic ASan runtime library, make sure
+  // the library is preloaded so that the wrappers work. If it is not, set
+  // DYLD_INSERT_LIBRARIES and re-exec ourselves.
+  Dl_info info;
+  CHECK(dladdr((void*)((uptr)__asan_init), &info));
+  const char *dyld_insert_libraries = GetEnv(kDyldInsertLibraries);
+  if (!dyld_insert_libraries ||
+      !REAL(strstr)(dyld_insert_libraries, info.dli_fname)) {
+    // DYLD_INSERT_LIBRARIES is not set or does not contain the runtime
+    // library.
+    char program_name[1024];
+    uint32_t buf_size = sizeof(program_name);
+    _NSGetExecutablePath(program_name, &buf_size);
+    // Ok to use setenv() since the wrappers don't depend on the value of
+    // asan_inited.
+    setenv(kDyldInsertLibraries, info.dli_fname, /*overwrite*/0);
+    if (flags()->verbosity >= 1) {
+      Report("exec()-ing the program with\n");
+      Report("%s=%s\n", kDyldInsertLibraries, info.dli_fname);
+      Report("to enable ASan wrappers.\n");
+      Report("Set ASAN_OPTIONS=allow_reexec=0 to disable this.\n");
+    }
+    execv(program_name, *_NSGetArgv());
+  }
+#endif  // MAC_INTERPOSE_FUNCTIONS
+  // If we're not using the dynamic runtime, do nothing.
+}
+
 // No-op. Mac does not support static linkage anyway.
 void *AsanDoesNotSupportStaticLinkage() {
   return 0;
@@ -93,37 +131,32 @@ bool AsanInterceptsSignal(int signum) {
 }
 
 void AsanPlatformThreadInit() {
-  ReplaceCFAllocator();
-}
-
-AsanLock::AsanLock(LinkerInitialized) {
-  // We assume that OS_SPINLOCK_INIT is zero
-}
-
-void AsanLock::Lock() {
-  CHECK(sizeof(OSSpinLock) <= sizeof(opaque_storage_));
-  CHECK(OS_SPINLOCK_INIT == 0);
-  CHECK(owner_ != (uptr)pthread_self());
-  OSSpinLockLock((OSSpinLock*)&opaque_storage_);
-  CHECK(!owner_);
-  owner_ = (uptr)pthread_self();
-}
-
-void AsanLock::Unlock() {
-  CHECK(owner_ == (uptr)pthread_self());
-  owner_ = 0;
-  OSSpinLockUnlock((OSSpinLock*)&opaque_storage_);
+  // For the first program thread, we can't replace the allocator before
+  // __CFInitialize() has been called. If it hasn't, we'll call
+  // MaybeReplaceCFAllocator() later on this thread.
+  // For other threads __CFInitialize() has been called before their creation.
+  // See also asan_malloc_mac.cc.
+  if (((CFRuntimeBase*)kCFAllocatorSystemDefault)->_cfisa) {
+    MaybeReplaceCFAllocator();
+  }
 }
 
-void AsanStackTrace::GetStackTrace(uptr max_s, uptr pc, uptr bp) {
-  size = 0;
-  trace[0] = pc;
+void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, bool fast) {
+  (void)fast;
+  stack->size = 0;
+  stack->trace[0] = pc;
   if ((max_s) > 1) {
-    max_size = max_s;
-    FastUnwindStack(pc, bp);
+    stack->max_size = max_s;
+    if (!asan_inited) return;
+    if (AsanThread *t = asanThreadRegistry().GetCurrent())
+      stack->FastUnwindStack(pc, bp, t->stack_top(), t->stack_bottom());
   }
 }
 
+void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
+  UNIMPLEMENTED();
+}
+
 // The range of pages to be used for escape islands.
 // TODO(glider): instead of mapping a fixed range we must find a range of
 // unmapped pages in vmmap and take them.
@@ -132,12 +165,12 @@ void AsanStackTrace::GetStackTrace(uptr max_s, uptr pc, uptr bp) {
 // kHighMemBeg or kHighMemEnd.
 static void *island_allocator_pos = 0;
 
-#if __WORDSIZE == 32
-# define kIslandEnd (0xffdf0000 - kPageSize)
-# define kIslandBeg (kIslandEnd - 256 * kPageSize)
+#if SANITIZER_WORDSIZE == 32
+# define kIslandEnd (0xffdf0000 - GetPageSizeCached())
+# define kIslandBeg (kIslandEnd - 256 * GetPageSizeCached())
 #else
-# define kIslandEnd (0x7fffffdf0000 - kPageSize)
-# define kIslandBeg (kIslandEnd - 256 * kPageSize)
+# define kIslandEnd (0x7fffffdf0000 - GetPageSizeCached())
+# define kIslandBeg (kIslandEnd - 256 * GetPageSizeCached())
 #endif
 
 extern "C"
@@ -161,7 +194,7 @@ mach_error_t __interception_allocate_island(void **ptr,
     internal_memset(island_allocator_pos, 0xCC, kIslandEnd - kIslandBeg);
   };
   *ptr = island_allocator_pos;
-  island_allocator_pos = (char*)island_allocator_pos + kPageSize;
+  island_allocator_pos = (char*)island_allocator_pos + GetPageSizeCached();
   if (flags()->verbosity) {
     Report("Branch island allocated at %p\n", *ptr);
   }
@@ -209,6 +242,7 @@ typedef void* pthread_workitem_handle_t;
 
 typedef void* dispatch_group_t;
 typedef void* dispatch_queue_t;
+typedef void* dispatch_source_t;
 typedef u64 dispatch_time_t;
 typedef void (*dispatch_function_t)(void *block);
 typedef void* (*worker_t)(void *block);
@@ -236,30 +270,34 @@ void dispatch_barrier_async_f(dispatch_queue_t dq, void *ctxt,
                               dispatch_function_t func);
 void dispatch_group_async_f(dispatch_group_t group, dispatch_queue_t dq,
                             void *ctxt, dispatch_function_t func);
-int pthread_workqueue_additem_np(pthread_workqueue_t workq,
-    void *(*workitem_func)(void *), void * workitem_arg,
-    pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp);
 }  // extern "C"
 
+static ALWAYS_INLINE
+void asan_register_worker_thread(int parent_tid, StackTrace *stack) {
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  if (!t) {
+    t = AsanThread::Create(parent_tid, 0, 0, stack);
+    asanThreadRegistry().RegisterThread(t);
+    t->Init();
+    asanThreadRegistry().SetCurrent(t);
+  }
+}
+
+// For use by only those functions that allocated the context via
+// alloc_asan_context().
 extern "C"
 void asan_dispatch_call_block_and_release(void *block) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
+  GET_STACK_TRACE_THREAD;
   asan_block_context_t *context = (asan_block_context_t*)block;
   if (flags()->verbosity >= 2) {
     Report("asan_dispatch_call_block_and_release(): "
            "context: %p, pthread_self: %p\n",
            block, pthread_self());
   }
-  AsanThread *t = asanThreadRegistry().GetCurrent();
-  if (!t) {
-    t = AsanThread::Create(context->parent_tid, 0, 0, &stack);
-    asanThreadRegistry().RegisterThread(t);
-    t->Init();
-    asanThreadRegistry().SetCurrent(t);
-  }
+  asan_register_worker_thread(context->parent_tid, &stack);
   // Call the original dispatcher for the block.
   context->func(context->block);
-  asan_free(context, &stack);
+  asan_free(context, &stack, FROM_MALLOC);
 }
 
 }  // namespace __asan
@@ -270,7 +308,7 @@ using namespace __asan;  // NOLINT
 // The caller retains control of the allocated context.
 extern "C"
 asan_block_context_t *alloc_asan_context(void *ctxt, dispatch_function_t func,
-                                         AsanStackTrace *stack) {
+                                         StackTrace *stack) {
   asan_block_context_t *asan_ctxt =
       (asan_block_context_t*) asan_malloc(sizeof(asan_block_context_t), stack);
   asan_ctxt->block = ctxt;
@@ -279,37 +317,30 @@ asan_block_context_t *alloc_asan_context(void *ctxt, dispatch_function_t func,
   return asan_ctxt;
 }
 
-// TODO(glider): can we reduce code duplication by introducing a macro?
-INTERCEPTOR(void, dispatch_async_f, dispatch_queue_t dq, void *ctxt,
-                                    dispatch_function_t func) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
-  asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack);
-  if (flags()->verbosity >= 2) {
-    Report("dispatch_async_f(): context: %p, pthread_self: %p\n",
-        asan_ctxt, pthread_self());
-    PRINT_CURRENT_STACK();
+// Define interceptor for dispatch_*_f function with the three most common
+// parameters: dispatch_queue_t, context, dispatch_function_t.
+#define INTERCEPT_DISPATCH_X_F_3(dispatch_x_f)                                \
+  INTERCEPTOR(void, dispatch_x_f, dispatch_queue_t dq, void *ctxt,            \
+                                  dispatch_function_t func) {                 \
+    GET_STACK_TRACE_THREAD;                                                   \
+    asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack); \
+    if (flags()->verbosity >= 2) {                                            \
+      Report(#dispatch_x_f "(): context: %p, pthread_self: %p\n",             \
+             asan_ctxt, pthread_self());                                      \
+       PRINT_CURRENT_STACK();                                                 \
+     }                                                                        \
+     return REAL(dispatch_x_f)(dq, (void*)asan_ctxt,                          \
+                               asan_dispatch_call_block_and_release);         \
   }
-  return REAL(dispatch_async_f)(dq, (void*)asan_ctxt,
-                                asan_dispatch_call_block_and_release);
-}
 
-INTERCEPTOR(void, dispatch_sync_f, dispatch_queue_t dq, void *ctxt,
-                                   dispatch_function_t func) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
-  asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack);
-  if (flags()->verbosity >= 2) {
-    Report("dispatch_sync_f(): context: %p, pthread_self: %p\n",
-        asan_ctxt, pthread_self());
-    PRINT_CURRENT_STACK();
-  }
-  return REAL(dispatch_sync_f)(dq, (void*)asan_ctxt,
-                               asan_dispatch_call_block_and_release);
-}
+INTERCEPT_DISPATCH_X_F_3(dispatch_async_f)
+INTERCEPT_DISPATCH_X_F_3(dispatch_sync_f)
+INTERCEPT_DISPATCH_X_F_3(dispatch_barrier_async_f)
 
 INTERCEPTOR(void, dispatch_after_f, dispatch_time_t when,
                                     dispatch_queue_t dq, void *ctxt,
                                     dispatch_function_t func) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
+  GET_STACK_TRACE_THREAD;
   asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack);
   if (flags()->verbosity >= 2) {
     Report("dispatch_after_f: %p\n", asan_ctxt);
@@ -319,23 +350,10 @@ INTERCEPTOR(void, dispatch_after_f, dispatch_time_t when,
                                 asan_dispatch_call_block_and_release);
 }
 
-INTERCEPTOR(void, dispatch_barrier_async_f, dispatch_queue_t dq, void *ctxt,
-                                            dispatch_function_t func) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
-  asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack);
-  if (flags()->verbosity >= 2) {
-    Report("dispatch_barrier_async_f(): context: %p, pthread_self: %p\n",
-           asan_ctxt, pthread_self());
-    PRINT_CURRENT_STACK();
-  }
-  REAL(dispatch_barrier_async_f)(dq, (void*)asan_ctxt,
-                                 asan_dispatch_call_block_and_release);
-}
-
 INTERCEPTOR(void, dispatch_group_async_f, dispatch_group_t group,
                                           dispatch_queue_t dq, void *ctxt,
                                           dispatch_function_t func) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
+  GET_STACK_TRACE_THREAD;
   asan_block_context_t *asan_ctxt = alloc_asan_context(ctxt, func, &stack);
   if (flags()->verbosity >= 2) {
     Report("dispatch_group_async_f(): context: %p, pthread_self: %p\n",
@@ -346,43 +364,66 @@ INTERCEPTOR(void, dispatch_group_async_f, dispatch_group_t group,
                                asan_dispatch_call_block_and_release);
 }
 
-// The following stuff has been extremely helpful while looking for the
-// unhandled functions that spawned jobs on Chromium shutdown. If the verbosity
-// level is 2 or greater, we wrap pthread_workqueue_additem_np() in order to
-// find the points of worker thread creation (each of such threads may be used
-// to run several tasks, that's why this is not enough to support the whole
-// libdispatch API.
-extern "C"
-void *wrap_workitem_func(void *arg) {
-  if (flags()->verbosity >= 2) {
-    Report("wrap_workitem_func: %p, pthread_self: %p\n", arg, pthread_self());
-  }
-  asan_block_context_t *ctxt = (asan_block_context_t*)arg;
-  worker_t fn = (worker_t)(ctxt->func);
-  void *result =  fn(ctxt->block);
-  GET_STACK_TRACE_HERE(kStackTraceMax);
-  asan_free(arg, &stack);
-  return result;
+#if MAC_INTERPOSE_FUNCTIONS && !defined(MISSING_BLOCKS_SUPPORT)
+// dispatch_async, dispatch_group_async and others tailcall the corresponding
+// dispatch_*_f functions. When wrapping functions with mach_override, those
+// dispatch_*_f are intercepted automatically. But with dylib interposition
+// this does not work, because the calls within the same library are not
+// interposed.
+// Therefore we need to re-implement dispatch_async and friends.
+
+extern "C" {
+// FIXME: consolidate these declarations with asan_intercepted_functions.h.
+void dispatch_async(dispatch_queue_t dq, void(^work)(void));
+void dispatch_group_async(dispatch_group_t dg, dispatch_queue_t dq,
+                          void(^work)(void));
+void dispatch_after(dispatch_time_t when, dispatch_queue_t queue,
+                    void(^work)(void));
+void dispatch_source_set_cancel_handler(dispatch_source_t ds,
+                                        void(^work)(void));
+void dispatch_source_set_event_handler(dispatch_source_t ds, void(^work)(void));
 }
 
-INTERCEPTOR(int, pthread_workqueue_additem_np, pthread_workqueue_t workq,
-    void *(*workitem_func)(void *), void * workitem_arg,
-    pthread_workitem_handle_t * itemhandlep, unsigned int *gencountp) {
-  GET_STACK_TRACE_HERE(kStackTraceMax);
-  asan_block_context_t *asan_ctxt =
-      (asan_block_context_t*) asan_malloc(sizeof(asan_block_context_t), &stack);
-  asan_ctxt->block = workitem_arg;
-  asan_ctxt->func = (dispatch_function_t)workitem_func;
-  asan_ctxt->parent_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
-  if (flags()->verbosity >= 2) {
-    Report("pthread_workqueue_additem_np: %p\n", asan_ctxt);
-    PRINT_CURRENT_STACK();
+#define GET_ASAN_BLOCK(work) \
+  void (^asan_block)(void);  \
+  int parent_tid = asanThreadRegistry().GetCurrentTidOrInvalid(); \
+  asan_block = ^(void) { \
+    GET_STACK_TRACE_THREAD; \
+    asan_register_worker_thread(parent_tid, &stack); \
+    work(); \
   }
-  return REAL(pthread_workqueue_additem_np)(workq, wrap_workitem_func,
-                                            asan_ctxt, itemhandlep,
-                                            gencountp);
+
+INTERCEPTOR(void, dispatch_async,
+            dispatch_queue_t dq, void(^work)(void)) {
+  GET_ASAN_BLOCK(work);
+  REAL(dispatch_async)(dq, asan_block);
+}
+
+INTERCEPTOR(void, dispatch_group_async,
+            dispatch_group_t dg, dispatch_queue_t dq, void(^work)(void)) {
+  GET_ASAN_BLOCK(work);
+  REAL(dispatch_group_async)(dg, dq, asan_block);
+}
+
+INTERCEPTOR(void, dispatch_after,
+            dispatch_time_t when, dispatch_queue_t queue, void(^work)(void)) {
+  GET_ASAN_BLOCK(work);
+  REAL(dispatch_after)(when, queue, asan_block);
 }
 
+INTERCEPTOR(void, dispatch_source_set_cancel_handler,
+            dispatch_source_t ds, void(^work)(void)) {
+  GET_ASAN_BLOCK(work);
+  REAL(dispatch_source_set_cancel_handler)(ds, asan_block);
+}
+
+INTERCEPTOR(void, dispatch_source_set_event_handler,
+            dispatch_source_t ds, void(^work)(void)) {
+  GET_ASAN_BLOCK(work);
+  REAL(dispatch_source_set_event_handler)(ds, asan_block);
+}
+#endif
+
 // See http://opensource.apple.com/source/CF/CF-635.15/CFString.c
 int __CFStrIsConstant(CFStringRef str) {
   CFRuntimeBase *base = (CFRuntimeBase*)str;
@@ -404,9 +445,7 @@ INTERCEPTOR(CFStringRef, CFStringCreateCopy, CFAllocatorRef alloc,
 
 DECLARE_REAL_AND_INTERCEPTOR(void, free, void *ptr)
 
-extern "C"
-void __CFInitialize();
-DECLARE_REAL_AND_INTERCEPTOR(void, __CFInitialize)
+DECLARE_REAL_AND_INTERCEPTOR(void, __CFInitialize, void)
 
 namespace __asan {
 
@@ -416,12 +455,6 @@ void InitializeMacInterceptors() {
   CHECK(INTERCEPT_FUNCTION(dispatch_after_f));
   CHECK(INTERCEPT_FUNCTION(dispatch_barrier_async_f));
   CHECK(INTERCEPT_FUNCTION(dispatch_group_async_f));
-  // We don't need to intercept pthread_workqueue_additem_np() to support the
-  // libdispatch API, but it helps us to debug the unsupported functions. Let's
-  // intercept it only during verbose runs.
-  if (flags()->verbosity >= 2) {
-    CHECK(INTERCEPT_FUNCTION(pthread_workqueue_additem_np));
-  }
   // Normally CFStringCreateCopy should not copy constant CF strings.
   // Replacing the default CFAllocator causes constant strings to be copied
   // rather than just returned, which leads to bugs in big applications like
diff --git a/lib/asan/asan_mac.h b/lib/asan/asan_mac.h
index 6c65765a804c..be913865c440 100644
--- a/lib/asan/asan_mac.h
+++ b/lib/asan/asan_mac.h
@@ -40,13 +40,17 @@ enum {
   MACOS_VERSION_UNKNOWN = 0,
   MACOS_VERSION_LEOPARD,
   MACOS_VERSION_SNOW_LEOPARD,
-  MACOS_VERSION_LION
+  MACOS_VERSION_LION,
+  MACOS_VERSION_MOUNTAIN_LION
 };
 
+// Used by asan_malloc_mac.cc and asan_mac.cc
+extern "C" void __CFInitialize();
+
 namespace __asan {
 
 int GetMacosVersion();
-void ReplaceCFAllocator();
+void MaybeReplaceCFAllocator();
 
 }  // namespace __asan
 
diff --git a/lib/asan/asan_malloc_linux.cc b/lib/asan/asan_malloc_linux.cc
index 1046f4c843a8..b95cfe3149b7 100644
--- a/lib/asan/asan_malloc_linux.cc
+++ b/lib/asan/asan_malloc_linux.cc
@@ -19,8 +19,16 @@
 #include "asan_interceptors.h"
 #include "asan_internal.h"
 #include "asan_stack.h"
+#include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
+
+#if ASAN_ANDROID
+DECLARE_REAL_AND_INTERCEPTOR(void*, malloc, uptr size)
+DECLARE_REAL_AND_INTERCEPTOR(void, free, void *ptr)
+DECLARE_REAL_AND_INTERCEPTOR(void*, calloc, uptr nmemb, uptr size)
+DECLARE_REAL_AND_INTERCEPTOR(void*, realloc, void *ptr, uptr size)
+DECLARE_REAL_AND_INTERCEPTOR(void*, memalign, uptr boundary, uptr size)
 
-#ifdef ANDROID
 struct MallocDebug {
   void* (*malloc)(uptr bytes);
   void  (*free)(void* mem);
@@ -30,7 +38,7 @@ struct MallocDebug {
 };
 
 const MallocDebug asan_malloc_dispatch ALIGNED(32) = {
-  malloc, free, calloc, realloc, memalign
+  WRAP(malloc), WRAP(free), WRAP(calloc), WRAP(realloc), WRAP(memalign)
 };
 
 extern "C" const MallocDebug* __libc_malloc_dispatch;
@@ -53,17 +61,17 @@ void ReplaceSystemMalloc() {
 using namespace __asan;  // NOLINT
 
 INTERCEPTOR(void, free, void *ptr) {
-  GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-  asan_free(ptr, &stack);
+  GET_STACK_TRACE_FREE;
+  asan_free(ptr, &stack, FROM_MALLOC);
 }
 
 INTERCEPTOR(void, cfree, void *ptr) {
-  GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-  asan_free(ptr, &stack);
+  GET_STACK_TRACE_FREE;
+  asan_free(ptr, &stack, FROM_MALLOC);
 }
 
 INTERCEPTOR(void*, malloc, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
@@ -79,25 +87,25 @@ INTERCEPTOR(void*, calloc, uptr nmemb, uptr size) {
     CHECK(allocated < kCallocPoolSize);
     return mem;
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_calloc(nmemb, size, &stack);
 }
 
 INTERCEPTOR(void*, realloc, void *ptr, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_realloc(ptr, size, &stack);
 }
 
 INTERCEPTOR(void*, memalign, uptr boundary, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
-  return asan_memalign(boundary, size, &stack);
+  GET_STACK_TRACE_MALLOC;
+  return asan_memalign(boundary, size, &stack, FROM_MALLOC);
 }
 
 INTERCEPTOR(void*, __libc_memalign, uptr align, uptr s)
   ALIAS("memalign");
 
 INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc_usable_size(ptr, &stack);
 }
 
@@ -120,19 +128,23 @@ INTERCEPTOR(int, mallopt, int cmd, int value) {
 }
 
 INTERCEPTOR(int, posix_memalign, void **memptr, uptr alignment, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   // Printf("posix_memalign: %zx %zu\n", alignment, size);
   return asan_posix_memalign(memptr, alignment, size, &stack);
 }
 
 INTERCEPTOR(void*, valloc, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_valloc(size, &stack);
 }
 
 INTERCEPTOR(void*, pvalloc, uptr size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_pvalloc(size, &stack);
 }
 
+INTERCEPTOR(void, malloc_stats, void) {
+  __asan_print_accumulated_stats();
+}
+
 #endif  // __linux__
diff --git a/lib/asan/asan_malloc_mac.cc b/lib/asan/asan_malloc_mac.cc
index 1a6c84052a0a..545ede2debe7 100644
--- a/lib/asan/asan_malloc_mac.cc
+++ b/lib/asan/asan_malloc_mac.cc
@@ -1,4 +1,4 @@
-//===-- asan_rtl.cc -------------------------------------------------------===//
+//===-- asan_malloc_mac.cc ------------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -18,13 +18,15 @@
 #include <CoreFoundation/CFBase.h>
 #include <dlfcn.h>
 #include <malloc/malloc.h>
-#include <setjmp.h>
 
 #include "asan_allocator.h"
 #include "asan_interceptors.h"
 #include "asan_internal.h"
 #include "asan_mac.h"
+#include "asan_report.h"
 #include "asan_stack.h"
+#include "asan_stats.h"
+#include "asan_thread_registry.h"
 
 // Similar code is used in Google Perftools,
 // http://code.google.com/p/google-perftools.
@@ -38,6 +40,30 @@ static malloc_zone_t *system_purgeable_zone = 0;
 static malloc_zone_t asan_zone;
 CFAllocatorRef cf_asan = 0;
 
+// _CFRuntimeCreateInstance() checks whether the supplied allocator is
+// kCFAllocatorSystemDefault and, if it is not, stores the allocator reference
+// at the beginning of the allocated memory and returns the pointer to the
+// allocated memory plus sizeof(CFAllocatorRef). See
+// http://www.opensource.apple.com/source/CF/CF-635.21/CFRuntime.c
+// Pointers returned by _CFRuntimeCreateInstance() can then be passed directly
+// to free() or CFAllocatorDeallocate(), which leads to false invalid free
+// reports.
+// The corresponding rdar bug is http://openradar.appspot.com/radar?id=1796404.
+void* ALWAYS_INLINE get_saved_cfallocator_ref(void *ptr) {
+  if (flags()->replace_cfallocator) {
+    // Make sure we're not hitting the previous page. This may be incorrect
+    // if ASan's malloc returns an address ending with 0xFF8, which will be
+    // then padded to a page boundary with a CFAllocatorRef.
+    uptr arith_ptr = (uptr)ptr;
+    if ((arith_ptr & 0xFFF) > sizeof(CFAllocatorRef)) {
+      CFAllocatorRef *saved =
+          (CFAllocatorRef*)(arith_ptr - sizeof(CFAllocatorRef));
+      if ((*saved == cf_asan) && asan_mz_size(saved)) ptr = (void*)saved;
+    }
+  }
+  return ptr;
+}
+
 // The free() implementation provided by OS X calls malloc_zone_from_ptr()
 // to find the owner of |ptr|. If the result is 0, an invalid free() is
 // reported. Our implementation falls back to asan_free() in this case
@@ -65,26 +91,12 @@ INTERCEPTOR(void, free, void *ptr) {
     malloc_zone_free(zone, ptr);
 #endif
   } else {
-    if (flags()->replace_cfallocator) {
-      // Make sure we're not hitting the previous page. This may be incorrect
-      // if ASan's malloc returns an address ending with 0xFF8, which will be
-      // then padded to a page boundary with a CFAllocatorRef.
-      uptr arith_ptr = (uptr)ptr;
-      if ((arith_ptr & 0xFFF) > sizeof(CFAllocatorRef)) {
-        CFAllocatorRef *saved =
-            (CFAllocatorRef*)(arith_ptr - sizeof(CFAllocatorRef));
-        if ((*saved == cf_asan) && asan_mz_size(saved)) ptr = (void*)saved;
-      }
-    }
-    GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-    asan_free(ptr, &stack);
+    if (!asan_mz_size(ptr)) ptr = get_saved_cfallocator_ref(ptr);
+    GET_STACK_TRACE_FREE;
+    asan_free(ptr, &stack, FROM_MALLOC);
   }
 }
 
-namespace __asan {
-  void ReplaceCFAllocator();
-}
-
 // We can't always replace the default CFAllocator with cf_asan right in
 // ReplaceSystemMalloc(), because it is sometimes called before
 // __CFInitialize(), when the default allocator is invalid and replacing it may
@@ -94,11 +106,15 @@ namespace __asan {
 //
 // See http://code.google.com/p/address-sanitizer/issues/detail?id=87
 // and http://opensource.apple.com/source/CF/CF-550.43/CFRuntime.c
-INTERCEPTOR(void, __CFInitialize) {
+INTERCEPTOR(void, __CFInitialize, void) {
+  // If the runtime is built as dynamic library, __CFInitialize wrapper may be
+  // called before __asan_init.
+#if !MAC_INTERPOSE_FUNCTIONS
   CHECK(flags()->replace_cfallocator);
   CHECK(asan_inited);
+#endif
   REAL(__CFInitialize)();
-  if (!cf_asan) ReplaceCFAllocator();
+  if (!cf_asan && asan_inited) MaybeReplaceCFAllocator();
 }
 
 namespace {
@@ -114,7 +130,7 @@ void *mz_malloc(malloc_zone_t *zone, size_t size) {
     CHECK(system_malloc_zone);
     return malloc_zone_malloc(system_malloc_zone, size);
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
@@ -123,7 +139,7 @@ void *cf_malloc(CFIndex size, CFOptionFlags hint, void *info) {
     CHECK(system_malloc_zone);
     return malloc_zone_malloc(system_malloc_zone, size);
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
@@ -139,7 +155,7 @@ void *mz_calloc(malloc_zone_t *zone, size_t nmemb, size_t size) {
     CHECK(allocated < kCallocPoolSize);
     return mem;
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_calloc(nmemb, size, &stack);
 }
 
@@ -148,39 +164,41 @@ void *mz_valloc(malloc_zone_t *zone, size_t size) {
     CHECK(system_malloc_zone);
     return malloc_zone_valloc(system_malloc_zone, size);
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
-  return asan_memalign(kPageSize, size, &stack);
+  GET_STACK_TRACE_MALLOC;
+  return asan_memalign(GetPageSizeCached(), size, &stack, FROM_MALLOC);
 }
 
-void print_zone_for_ptr(void *ptr) {
-  malloc_zone_t *orig_zone = malloc_zone_from_ptr(ptr);
-  if (orig_zone) {
-    if (orig_zone->zone_name) {
-      AsanPrintf("malloc_zone_from_ptr(%p) = %p, which is %s\n",
-                 ptr, orig_zone, orig_zone->zone_name);
-    } else {
-      AsanPrintf("malloc_zone_from_ptr(%p) = %p, which doesn't have a name\n",
-                 ptr, orig_zone);
-    }
-  } else {
-    AsanPrintf("malloc_zone_from_ptr(%p) = 0\n", ptr);
-  }
-}
+#define GET_ZONE_FOR_PTR(ptr) \
+  malloc_zone_t *zone_ptr = malloc_zone_from_ptr(ptr); \
+  const char *zone_name = (zone_ptr == 0) ? 0 : zone_ptr->zone_name
 
 void ALWAYS_INLINE free_common(void *context, void *ptr) {
   if (!ptr) return;
-  if (!flags()->mac_ignore_invalid_free || asan_mz_size(ptr)) {
-    GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-    asan_free(ptr, &stack);
+  if (asan_mz_size(ptr)) {
+    GET_STACK_TRACE_FREE;
+    asan_free(ptr, &stack, FROM_MALLOC);
   } else {
-    // Let us just leak this memory for now.
-    AsanPrintf("free_common(%p) -- attempting to free unallocated memory.\n"
-               "AddressSanitizer is ignoring this error on Mac OS now.\n",
-               ptr);
-    print_zone_for_ptr(ptr);
-    GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-    stack.PrintStack();
-    return;
+    // If the pointer does not belong to any of the zones, use one of the
+    // fallback methods to free memory.
+    malloc_zone_t *zone_ptr = malloc_zone_from_ptr(ptr);
+    if (zone_ptr == system_purgeable_zone) {
+      // allocations from malloc_default_purgeable_zone() done before
+      // __asan_init() may be occasionally freed via free_common().
+      // see http://code.google.com/p/address-sanitizer/issues/detail?id=99.
+      malloc_zone_free(zone_ptr, ptr);
+    } else {
+      // If the memory chunk pointer was moved to store additional
+      // CFAllocatorRef, fix it back.
+      ptr = get_saved_cfallocator_ref(ptr);
+      GET_STACK_TRACE_FREE;
+      if (!flags()->mac_ignore_invalid_free) {
+        asan_free(ptr, &stack, FROM_MALLOC);
+      } else {
+        GET_ZONE_FOR_PTR(ptr);
+        WarnMacFreeUnallocated((uptr)ptr, (uptr)zone_ptr, zone_name, &stack);
+        return;
+      }
+    }
   }
 }
 
@@ -195,55 +213,45 @@ void cf_free(void *ptr, void *info) {
 
 void *mz_realloc(malloc_zone_t *zone, void *ptr, size_t size) {
   if (!ptr) {
-    GET_STACK_TRACE_HERE_FOR_MALLOC;
+    GET_STACK_TRACE_MALLOC;
     return asan_malloc(size, &stack);
   } else {
     if (asan_mz_size(ptr)) {
-      GET_STACK_TRACE_HERE_FOR_MALLOC;
+      GET_STACK_TRACE_MALLOC;
       return asan_realloc(ptr, size, &stack);
     } else {
       // We can't recover from reallocating an unknown address, because
       // this would require reading at most |size| bytes from
       // potentially unaccessible memory.
-      AsanPrintf("mz_realloc(%p) -- attempting to realloc unallocated memory.\n"
-                 "This is an unrecoverable problem, exiting now.\n",
-                 ptr);
-      print_zone_for_ptr(ptr);
-      GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-      stack.PrintStack();
-      ShowStatsAndAbort();
-      return 0;  // unreachable
+      GET_STACK_TRACE_FREE;
+      GET_ZONE_FOR_PTR(ptr);
+      ReportMacMzReallocUnknown((uptr)ptr, (uptr)zone_ptr, zone_name, &stack);
     }
   }
 }
 
 void *cf_realloc(void *ptr, CFIndex size, CFOptionFlags hint, void *info) {
   if (!ptr) {
-    GET_STACK_TRACE_HERE_FOR_MALLOC;
+    GET_STACK_TRACE_MALLOC;
     return asan_malloc(size, &stack);
   } else {
     if (asan_mz_size(ptr)) {
-      GET_STACK_TRACE_HERE_FOR_MALLOC;
+      GET_STACK_TRACE_MALLOC;
       return asan_realloc(ptr, size, &stack);
     } else {
       // We can't recover from reallocating an unknown address, because
       // this would require reading at most |size| bytes from
       // potentially unaccessible memory.
-      AsanPrintf("cf_realloc(%p) -- attempting to realloc unallocated memory.\n"
-                 "This is an unrecoverable problem, exiting now.\n",
-                 ptr);
-      print_zone_for_ptr(ptr);
-      GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-      stack.PrintStack();
-      ShowStatsAndAbort();
-      return 0;  // unreachable
+      GET_STACK_TRACE_FREE;
+      GET_ZONE_FOR_PTR(ptr);
+      ReportMacCfReallocUnknown((uptr)ptr, (uptr)zone_ptr, zone_name, &stack);
     }
   }
 }
 
 void mz_destroy(malloc_zone_t* zone) {
   // A no-op -- we will not be destroyed!
-  AsanPrintf("mz_destroy() called -- ignoring\n");
+  Printf("mz_destroy() called -- ignoring\n");
 }
   // from AvailabilityMacros.h
 #if defined(MAC_OS_X_VERSION_10_6) && \
@@ -253,8 +261,8 @@ void *mz_memalign(malloc_zone_t *zone, size_t align, size_t size) {
     CHECK(system_malloc_zone);
     return malloc_zone_memalign(system_malloc_zone, align, size);
   }
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
-  return asan_memalign(align, size, &stack);
+  GET_STACK_TRACE_MALLOC;
+  return asan_memalign(align, size, &stack, FROM_MALLOC);
 }
 
 // This function is currently unused, and we build with -Werror.
@@ -266,7 +274,6 @@ void mz_free_definite_size(malloc_zone_t* zone, void *ptr, size_t size) {
 #endif
 #endif
 
-// malloc_introspection callbacks.  I'm not clear on what all of these do.
 kern_return_t mi_enumerator(task_t task, void *,
                             unsigned type_mask, vm_address_t zone_address,
                             memory_reader_t reader,
@@ -282,12 +289,10 @@ size_t mi_good_size(malloc_zone_t *zone, size_t size) {
 
 boolean_t mi_check(malloc_zone_t *zone) {
   UNIMPLEMENTED();
-  return true;
 }
 
 void mi_print(malloc_zone_t *zone, boolean_t verbose) {
   UNIMPLEMENTED();
-  return;
 }
 
 void mi_log(malloc_zone_t *zone, void *address) {
@@ -302,17 +307,12 @@ void mi_force_unlock(malloc_zone_t *zone) {
   asan_mz_force_unlock();
 }
 
-// This function is currently unused, and we build with -Werror.
-#if 0
 void mi_statistics(malloc_zone_t *zone, malloc_statistics_t *stats) {
-  // TODO(csilvers): figure out how to fill these out
-  // TODO(glider): port this from tcmalloc when ready.
-  stats->blocks_in_use = 0;
-  stats->size_in_use = 0;
-  stats->max_size_in_use = 0;
-  stats->size_allocated = 0;
+  AsanMallocStats malloc_stats;
+  asanThreadRegistry().FillMallocStatistics(&malloc_stats);
+  CHECK(sizeof(malloc_statistics_t) == sizeof(AsanMallocStats));
+  internal_memcpy(stats, &malloc_stats, sizeof(malloc_statistics_t));
 }
-#endif
 
 #if defined(MAC_OS_X_VERSION_10_6) && \
     MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
@@ -327,7 +327,7 @@ boolean_t mi_zone_locked(malloc_zone_t *zone) {
 extern int __CFRuntimeClassTableSize;
 
 namespace __asan {
-void ReplaceCFAllocator() {
+void MaybeReplaceCFAllocator() {
   static CFAllocatorContext asan_context = {
         /*version*/ 0, /*info*/ &asan_zone,
         /*retain*/ 0, /*release*/ 0,
@@ -338,7 +338,7 @@ void ReplaceCFAllocator() {
         /*preferredSize*/ 0 };
   if (!cf_asan)
     cf_asan = CFAllocatorCreate(kCFAllocatorUseContext, &asan_context);
-  if (CFAllocatorGetDefault() != cf_asan)
+  if (flags()->replace_cfallocator && CFAllocatorGetDefault() != cf_asan)
     CFAllocatorSetDefault(cf_asan);
 }
 
@@ -354,6 +354,7 @@ void ReplaceSystemMalloc() {
   asan_introspection.log = &mi_log;
   asan_introspection.force_lock = &mi_force_lock;
   asan_introspection.force_unlock = &mi_force_unlock;
+  asan_introspection.statistics = &mi_statistics;
 
   internal_memset(&asan_zone, 0, sizeof(malloc_zone_t));
 
@@ -405,16 +406,14 @@ void ReplaceSystemMalloc() {
   // Make sure the default allocator was replaced.
   CHECK(malloc_default_zone() == &asan_zone);
 
-  if (flags()->replace_cfallocator) {
-    // If __CFInitialize() hasn't been called yet, cf_asan will be created and
-    // installed as the default allocator after __CFInitialize() finishes (see
-    // the interceptor for __CFInitialize() above). Otherwise install cf_asan
-    // right now. On both Snow Leopard and Lion __CFInitialize() calls
-    // __CFAllocatorInitialize(), which initializes the _base._cfisa field of
-    // the default allocators we check here.
-    if (((CFRuntimeBase*)kCFAllocatorSystemDefault)->_cfisa) {
-      ReplaceCFAllocator();
-    }
+  // If __CFInitialize() hasn't been called yet, cf_asan will be created and
+  // installed as the default allocator after __CFInitialize() finishes (see
+  // the interceptor for __CFInitialize() above). Otherwise install cf_asan
+  // right now. On both Snow Leopard and Lion __CFInitialize() calls
+  // __CFAllocatorInitialize(), which initializes the _base._cfisa field of
+  // the default allocators we check here.
+  if (((CFRuntimeBase*)kCFAllocatorSystemDefault)->_cfisa) {
+    MaybeReplaceCFAllocator();
   }
 }
 }  // namespace __asan
diff --git a/lib/asan/asan_malloc_win.cc b/lib/asan/asan_malloc_win.cc
index 6c00e77caae8..9fcfea56384f 100644
--- a/lib/asan/asan_malloc_win.cc
+++ b/lib/asan/asan_malloc_win.cc
@@ -17,9 +17,10 @@
 #include "asan_interceptors.h"
 #include "asan_internal.h"
 #include "asan_stack.h"
-
 #include "interception/interception.h"
 
+#include <stddef.h>
+
 // ---------------------- Replacement functions ---------------- {{{1
 using namespace __asan;  // NOLINT
 
@@ -30,8 +31,8 @@ using namespace __asan;  // NOLINT
 
 extern "C" {
 void free(void *ptr) {
-  GET_STACK_TRACE_HERE_FOR_FREE(ptr);
-  return asan_free(ptr, &stack);
+  GET_STACK_TRACE_FREE;
+  return asan_free(ptr, &stack, FROM_MALLOC);
 }
 
 void _free_dbg(void* ptr, int) {
@@ -43,7 +44,7 @@ void cfree(void *ptr) {
 }
 
 void *malloc(size_t size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc(size, &stack);
 }
 
@@ -52,7 +53,7 @@ void* _malloc_dbg(size_t size, int , const char*, int) {
 }
 
 void *calloc(size_t nmemb, size_t size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_calloc(nmemb, size, &stack);
 }
 
@@ -65,7 +66,7 @@ void *_calloc_impl(size_t nmemb, size_t size, int *errno_tmp) {
 }
 
 void *realloc(void *ptr, size_t size) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_realloc(ptr, size, &stack);
 }
 
@@ -84,7 +85,7 @@ void* _recalloc(void* p, size_t n, size_t elem_size) {
 }
 
 size_t _msize(void *ptr) {
-  GET_STACK_TRACE_HERE_FOR_MALLOC;
+  GET_STACK_TRACE_MALLOC;
   return asan_malloc_usable_size(ptr, &stack);
 }
 
diff --git a/lib/asan/asan_mapping.h b/lib/asan/asan_mapping.h
index 8e0c6ec5db20..5e3067031f4a 100644
--- a/lib/asan/asan_mapping.h
+++ b/lib/asan/asan_mapping.h
@@ -20,20 +20,24 @@
 // http://code.google.com/p/address-sanitizer/wiki/AddressSanitizerAlgorithm
 
 #if ASAN_FLEXIBLE_MAPPING_AND_OFFSET == 1
-extern __attribute__((visibility("default"))) uptr __asan_mapping_scale;
-extern __attribute__((visibility("default"))) uptr __asan_mapping_offset;
+extern SANITIZER_INTERFACE_ATTRIBUTE uptr __asan_mapping_scale;
+extern SANITIZER_INTERFACE_ATTRIBUTE uptr __asan_mapping_offset;
 # define SHADOW_SCALE (__asan_mapping_scale)
 # define SHADOW_OFFSET (__asan_mapping_offset)
 #else
-# ifdef ANDROID
+# if ASAN_ANDROID
 #  define SHADOW_SCALE (3)
 #  define SHADOW_OFFSET (0)
 # else
 #  define SHADOW_SCALE (3)
-#  if __WORDSIZE == 32
+#  if SANITIZER_WORDSIZE == 32
 #   define SHADOW_OFFSET (1 << 29)
 #  else
-#   define SHADOW_OFFSET (1ULL << 44)
+#   if defined(__powerpc64__)
+#    define SHADOW_OFFSET (1ULL << 41)
+#   else
+#    define SHADOW_OFFSET (1ULL << 44)
+#   endif
 #  endif
 # endif
 #endif  // ASAN_FLEXIBLE_MAPPING_AND_OFFSET
@@ -42,11 +46,15 @@ extern __attribute__((visibility("default"))) uptr __asan_mapping_offset;
 #define MEM_TO_SHADOW(mem) (((mem) >> SHADOW_SCALE) | (SHADOW_OFFSET))
 #define SHADOW_TO_MEM(shadow) (((shadow) - SHADOW_OFFSET) << SHADOW_SCALE)
 
-#if __WORDSIZE == 64
+#if SANITIZER_WORDSIZE == 64
+# if defined(__powerpc64__)
+  static const uptr kHighMemEnd = 0x00000fffffffffffUL;
+# else
   static const uptr kHighMemEnd = 0x00007fffffffffffUL;
-#else  // __WORDSIZE == 32
+# endif
+#else  // SANITIZER_WORDSIZE == 32
   static const uptr kHighMemEnd = 0xffffffff;
-#endif  // __WORDSIZE
+#endif  // SANITIZER_WORDSIZE
 
 
 #define kLowMemBeg      0
@@ -60,7 +68,12 @@ extern __attribute__((visibility("default"))) uptr __asan_mapping_offset;
 #define kHighShadowBeg  MEM_TO_SHADOW(kHighMemBeg)
 #define kHighShadowEnd  MEM_TO_SHADOW(kHighMemEnd)
 
-#define kShadowGapBeg   (kLowShadowEnd ? kLowShadowEnd + 1 : 16 * kPageSize)
+// With the zero shadow base we can not actually map pages starting from 0.
+// This constant is somewhat arbitrary.
+#define kZeroBaseShadowStart (1 << 18)
+
+#define kShadowGapBeg   (kLowShadowEnd ? kLowShadowEnd + 1 \
+                                       : kZeroBaseShadowStart)
 #define kShadowGapEnd   (kHighShadowBeg - 1)
 
 #define kGlobalAndStackRedzone \
diff --git a/lib/asan/asan_new_delete.cc b/lib/asan/asan_new_delete.cc
index 4a7275842f08..5d1f23c542e6 100644
--- a/lib/asan/asan_new_delete.cc
+++ b/lib/asan/asan_new_delete.cc
@@ -17,7 +17,6 @@
 #include "asan_stack.h"
 
 #include <stddef.h>
-#include <new>
 
 namespace __asan {
 // This function is a no-op. We need it to make sure that object file
@@ -28,29 +27,42 @@ void ReplaceOperatorsNewAndDelete() { }
 
 using namespace __asan;  // NOLINT
 
-#define OPERATOR_NEW_BODY \
-  GET_STACK_TRACE_HERE_FOR_MALLOC;\
-  return asan_memalign(0, size, &stack);
-
-#ifdef ANDROID
-void *operator new(size_t size) { OPERATOR_NEW_BODY; }
-void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
-#else
-void *operator new(size_t size) throw(std::bad_alloc) { OPERATOR_NEW_BODY; }
-void *operator new[](size_t size) throw(std::bad_alloc) { OPERATOR_NEW_BODY; }
-void *operator new(size_t size, std::nothrow_t const&) throw()
-{ OPERATOR_NEW_BODY; }
-void *operator new[](size_t size, std::nothrow_t const&) throw()
-{ OPERATOR_NEW_BODY; }
-#endif
+// On Android new() goes through malloc interceptors.
+#if !ASAN_ANDROID
+
+// Fake std::nothrow_t to avoid including <new>.
+namespace std {
+struct nothrow_t {};
+}  // namespace std
+
+#define OPERATOR_NEW_BODY(type) \
+  GET_STACK_TRACE_MALLOC;\
+  return asan_memalign(0, size, &stack, type);
 
-#define OPERATOR_DELETE_BODY \
-  GET_STACK_TRACE_HERE_FOR_FREE(ptr);\
-  asan_free(ptr, &stack);
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size, std::nothrow_t const&)
+{ OPERATOR_NEW_BODY(FROM_NEW); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size, std::nothrow_t const&)
+{ OPERATOR_NEW_BODY(FROM_NEW_BR); }
 
-void operator delete(void *ptr) throw() { OPERATOR_DELETE_BODY; }
-void operator delete[](void *ptr) throw() { OPERATOR_DELETE_BODY; }
-void operator delete(void *ptr, std::nothrow_t const&) throw()
-{ OPERATOR_DELETE_BODY; }
-void operator delete[](void *ptr, std::nothrow_t const&) throw()
-{ OPERATOR_DELETE_BODY; }
+#define OPERATOR_DELETE_BODY(type) \
+  GET_STACK_TRACE_FREE;\
+  asan_free(ptr, &stack, type);
+
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, std::nothrow_t const&)
+{ OPERATOR_DELETE_BODY(FROM_NEW); }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, std::nothrow_t const&)
+{ OPERATOR_DELETE_BODY(FROM_NEW_BR); }
+
+#endif
diff --git a/lib/asan/asan_poisoning.cc b/lib/asan/asan_poisoning.cc
index 3b9d9f6795ca..dc5749243569 100644
--- a/lib/asan/asan_poisoning.cc
+++ b/lib/asan/asan_poisoning.cc
@@ -13,17 +13,19 @@
 //===----------------------------------------------------------------------===//
 
 #include "asan_interceptors.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
 #include "asan_mapping.h"
+#include "sanitizer/asan_interface.h"
+#include "sanitizer_common/sanitizer_libc.h"
 
 namespace __asan {
 
 void PoisonShadow(uptr addr, uptr size, u8 value) {
+  if (!flags()->poison_heap) return;
   CHECK(AddrIsAlignedByGranularity(addr));
   CHECK(AddrIsAlignedByGranularity(addr + size));
   uptr shadow_beg = MemToShadow(addr);
-  uptr shadow_end = MemToShadow(addr + size);
+  uptr shadow_end = MemToShadow(addr + size - SHADOW_GRANULARITY) + 1;
   CHECK(REAL(memset) != 0);
   REAL(memset)((void*)shadow_beg, value, shadow_end - shadow_beg);
 }
@@ -32,6 +34,7 @@ void PoisonShadowPartialRightRedzone(uptr addr,
                                      uptr size,
                                      uptr redzone_size,
                                      u8 value) {
+  if (!flags()->poison_heap) return;
   CHECK(AddrIsAlignedByGranularity(addr));
   u8 *shadow = (u8*)MemToShadow(addr);
   for (uptr i = 0; i < redzone_size;
@@ -151,3 +154,67 @@ void __asan_unpoison_memory_region(void const volatile *addr, uptr size) {
 bool __asan_address_is_poisoned(void const volatile *addr) {
   return __asan::AddressIsPoisoned((uptr)addr);
 }
+
+uptr __asan_region_is_poisoned(uptr beg, uptr size) {
+  if (!size) return 0;
+  uptr end = beg + size;
+  if (!AddrIsInMem(beg)) return beg;
+  if (!AddrIsInMem(end)) return end;
+  uptr aligned_b = RoundUpTo(beg, SHADOW_GRANULARITY);
+  uptr aligned_e = RoundDownTo(end, SHADOW_GRANULARITY);
+  uptr shadow_beg = MemToShadow(aligned_b);
+  uptr shadow_end = MemToShadow(aligned_e);
+  // First check the first and the last application bytes,
+  // then check the SHADOW_GRANULARITY-aligned region by calling
+  // mem_is_zero on the corresponding shadow.
+  if (!__asan::AddressIsPoisoned(beg) &&
+      !__asan::AddressIsPoisoned(end - 1) &&
+      (shadow_end <= shadow_beg ||
+       __sanitizer::mem_is_zero((const char *)shadow_beg,
+                                shadow_end - shadow_beg)))
+    return 0;
+  // The fast check failed, so we have a poisoned byte somewhere.
+  // Find it slowly.
+  for (; beg < end; beg++)
+    if (__asan::AddressIsPoisoned(beg))
+      return beg;
+  UNREACHABLE("mem_is_zero returned false, but poisoned byte was not found");
+  return 0;
+}
+
+// This is a simplified version of __asan_(un)poison_memory_region, which
+// assumes that left border of region to be poisoned is properly aligned.
+static void PoisonAlignedStackMemory(uptr addr, uptr size, bool do_poison) {
+  if (size == 0) return;
+  uptr aligned_size = size & ~(SHADOW_GRANULARITY - 1);
+  PoisonShadow(addr, aligned_size,
+               do_poison ? kAsanStackUseAfterScopeMagic : 0);
+  if (size == aligned_size)
+    return;
+  s8 end_offset = (s8)(size - aligned_size);
+  s8* shadow_end = (s8*)MemToShadow(addr + aligned_size);
+  s8 end_value = *shadow_end;
+  if (do_poison) {
+    // If possible, mark all the bytes mapping to last shadow byte as
+    // unaddressable.
+    if (end_value > 0 && end_value <= end_offset)
+      *shadow_end = (s8)kAsanStackUseAfterScopeMagic;
+  } else {
+    // If necessary, mark few first bytes mapping to last shadow byte
+    // as addressable
+    if (end_value != 0)
+      *shadow_end = Max(end_value, end_offset);
+  }
+}
+
+void __asan_poison_stack_memory(uptr addr, uptr size) {
+  if (flags()->verbosity > 0)
+    Report("poisoning: %p %zx\n", (void*)addr, size);
+  PoisonAlignedStackMemory(addr, size, true);
+}
+
+void __asan_unpoison_stack_memory(uptr addr, uptr size) {
+  if (flags()->verbosity > 0)
+    Report("unpoisoning: %p %zx\n", (void*)addr, size);
+  PoisonAlignedStackMemory(addr, size, false);
+}
diff --git a/lib/asan/asan_posix.cc b/lib/asan/asan_posix.cc
index 061bb193034d..ceaf120fc803 100644
--- a/lib/asan/asan_posix.cc
+++ b/lib/asan/asan_posix.cc
@@ -16,6 +16,7 @@
 #include "asan_internal.h"
 #include "asan_interceptors.h"
 #include "asan_mapping.h"
+#include "asan_report.h"
 #include "asan_stack.h"
 #include "asan_thread_registry.h"
 #include "sanitizer_common/sanitizer_libc.h"
@@ -53,14 +54,7 @@ static void     ASAN_OnSIGSEGV(int, siginfo_t *siginfo, void *context) {
   if (13 != internal_write(2, "ASAN:SIGSEGV\n", 13)) Die();
   uptr pc, sp, bp;
   GetPcSpBp(context, &pc, &sp, &bp);
-  AsanReport("ERROR: AddressSanitizer crashed on unknown address %p"
-             " (pc %p sp %p bp %p T%d)\n",
-             (void*)addr, (void*)pc, (void*)sp, (void*)bp,
-             asanThreadRegistry().GetCurrentTidOrInvalid());
-  AsanPrintf("AddressSanitizer can not provide additional info. ABORTING\n");
-  GET_STACK_TRACE_WITH_PC_AND_BP(kStackTraceMax, pc, bp);
-  stack.PrintStack();
-  ShowStatsAndAbort();
+  ReportSIGSEGV(pc, sp, bp, addr);
 }
 
 void SetAlternateSignalStack() {
diff --git a/lib/asan/asan_printf.cc b/lib/asan/asan_printf.cc
deleted file mode 100644
index e1304f0fbe3f..000000000000
--- a/lib/asan/asan_printf.cc
+++ /dev/null
@@ -1,59 +0,0 @@
-//===-- asan_printf.cc ----------------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
-// Internal printf function, used inside ASan run-time library.
-// We can't use libc printf because we intercept some of the functions used
-// inside it.
-//===----------------------------------------------------------------------===//
-
-#include "asan_internal.h"
-#include "asan_interceptors.h"
-#include "sanitizer_common/sanitizer_libc.h"
-#include "sanitizer_common/sanitizer_common.h"
-
-#include <stdarg.h>
-#include <stdio.h>
-
-namespace __sanitizer {
-int VSNPrintf(char *buff, int buff_length, const char *format, va_list args);
-}  // namespace __sanitizer
-
-namespace __asan {
-
-void AsanPrintf(const char *format, ...) {
-  const int kLen = 1024 * 4;
-  char buffer[kLen];
-  va_list args;
-  va_start(args, format);
-  int needed_length = VSNPrintf(buffer, kLen, format, args);
-  va_end(args);
-  RAW_CHECK_MSG(needed_length < kLen, "Buffer in Printf is too short!\n");
-  RawWrite(buffer);
-  AppendToErrorMessageBuffer(buffer);
-}
-
-// Like AsanPrintf, but prints the current PID before the output string.
-void AsanReport(const char *format, ...) {
-  const int kLen = 1024 * 4;
-  char buffer[kLen];
-  int needed_length = internal_snprintf(buffer, kLen, "==%d== ", GetPid());
-  RAW_CHECK_MSG(needed_length < kLen, "Buffer in Report is too short!\n");
-  va_list args;
-  va_start(args, format);
-  needed_length += VSNPrintf(buffer + needed_length, kLen - needed_length,
-                             format, args);
-  va_end(args);
-  RAW_CHECK_MSG(needed_length < kLen, "Buffer in Report is too short!\n");
-  RawWrite(buffer);
-  AppendToErrorMessageBuffer(buffer);
-}
-
-}  // namespace __asan
diff --git a/lib/asan/asan_report.cc b/lib/asan/asan_report.cc
new file mode 100644
index 000000000000..35ab9cabde67
--- /dev/null
+++ b/lib/asan/asan_report.cc
@@ -0,0 +1,681 @@
+//===-- asan_report.cc ----------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// This file contains error reporting code.
+//===----------------------------------------------------------------------===//
+#include "asan_flags.h"
+#include "asan_internal.h"
+#include "asan_mapping.h"
+#include "asan_report.h"
+#include "asan_stack.h"
+#include "asan_thread.h"
+#include "asan_thread_registry.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_report_decorator.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
+
+namespace __asan {
+
+// -------------------- User-specified callbacks ----------------- {{{1
+static void (*error_report_callback)(const char*);
+static char *error_message_buffer = 0;
+static uptr error_message_buffer_pos = 0;
+static uptr error_message_buffer_size = 0;
+
+void AppendToErrorMessageBuffer(const char *buffer) {
+  if (error_message_buffer) {
+    uptr length = internal_strlen(buffer);
+    CHECK_GE(error_message_buffer_size, error_message_buffer_pos);
+    uptr remaining = error_message_buffer_size - error_message_buffer_pos;
+    internal_strncpy(error_message_buffer + error_message_buffer_pos,
+                     buffer, remaining);
+    error_message_buffer[error_message_buffer_size - 1] = '\0';
+    // FIXME: reallocate the buffer instead of truncating the message.
+    error_message_buffer_pos += remaining > length ? length : remaining;
+  }
+}
+
+// ---------------------- Decorator ------------------------------ {{{1
+bool PrintsToTtyCached() {
+  static int cached = 0;
+  static bool prints_to_tty;
+  if (!cached) {  // Ok wrt threads since we are printing only from one thread.
+    prints_to_tty = PrintsToTty();
+    cached = 1;
+  }
+  return prints_to_tty;
+}
+class Decorator: private __sanitizer::AnsiColorDecorator {
+ public:
+  Decorator() : __sanitizer::AnsiColorDecorator(PrintsToTtyCached()) { }
+  const char *Warning()    { return Red(); }
+  const char *EndWarning() { return Default(); }
+  const char *Access()     { return Blue(); }
+  const char *EndAccess()  { return Default(); }
+  const char *Location()   { return Green(); }
+  const char *EndLocation() { return Default(); }
+  const char *Allocation()  { return Magenta(); }
+  const char *EndAllocation()  { return Default(); }
+
+  const char *ShadowByte(u8 byte) {
+    switch (byte) {
+      case kAsanHeapLeftRedzoneMagic:
+      case kAsanHeapRightRedzoneMagic:
+        return Red();
+      case kAsanHeapFreeMagic:
+        return Magenta();
+      case kAsanStackLeftRedzoneMagic:
+      case kAsanStackMidRedzoneMagic:
+      case kAsanStackRightRedzoneMagic:
+      case kAsanStackPartialRedzoneMagic:
+        return Red();
+      case kAsanStackAfterReturnMagic:
+        return Magenta();
+      case kAsanInitializationOrderMagic:
+        return Cyan();
+      case kAsanUserPoisonedMemoryMagic:
+        return Blue();
+      case kAsanStackUseAfterScopeMagic:
+        return Magenta();
+      case kAsanGlobalRedzoneMagic:
+        return Red();
+      case kAsanInternalHeapMagic:
+        return Yellow();
+      default:
+        return Default();
+    }
+  }
+  const char *EndShadowByte() { return Default(); }
+};
+
+// ---------------------- Helper functions ----------------------- {{{1
+
+static void PrintShadowByte(const char *before, u8 byte,
+                            const char *after = "\n") {
+  Decorator d;
+  Printf("%s%s%x%x%s%s", before,
+         d.ShadowByte(byte), byte >> 4, byte & 15, d.EndShadowByte(), after);
+}
+
+static void PrintShadowBytes(const char *before, u8 *bytes,
+                             u8 *guilty, uptr n) {
+  Decorator d;
+  if (before)
+    Printf("%s%p:", before, bytes);
+  for (uptr i = 0; i < n; i++) {
+    u8 *p = bytes + i;
+    const char *before = p == guilty ? "[" :
+        p - 1 == guilty ? "" : " ";
+    const char *after = p == guilty ? "]" : "";
+    PrintShadowByte(before, *p, after);
+  }
+  Printf("\n");
+}
+
+static void PrintShadowMemoryForAddress(uptr addr) {
+  if (!AddrIsInMem(addr))
+    return;
+  uptr shadow_addr = MemToShadow(addr);
+  const uptr n_bytes_per_row = 16;
+  uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
+  Printf("Shadow bytes around the buggy address:\n");
+  for (int i = -5; i <= 5; i++) {
+    const char *prefix = (i == 0) ? "=>" : "  ";
+    PrintShadowBytes(prefix,
+                     (u8*)(aligned_shadow + i * n_bytes_per_row),
+                     (u8*)shadow_addr, n_bytes_per_row);
+  }
+  Printf("Shadow byte legend (one shadow byte represents %d "
+         "application bytes):\n", (int)SHADOW_GRANULARITY);
+  PrintShadowByte("  Addressable:           ", 0);
+  Printf("  Partially addressable: ");
+  for (uptr i = 1; i < SHADOW_GRANULARITY; i++)
+    PrintShadowByte("", i, " ");
+  Printf("\n");
+  PrintShadowByte("  Heap left redzone:     ", kAsanHeapLeftRedzoneMagic);
+  PrintShadowByte("  Heap righ redzone:     ", kAsanHeapRightRedzoneMagic);
+  PrintShadowByte("  Freed Heap region:     ", kAsanHeapFreeMagic);
+  PrintShadowByte("  Stack left redzone:    ", kAsanStackLeftRedzoneMagic);
+  PrintShadowByte("  Stack mid redzone:     ", kAsanStackMidRedzoneMagic);
+  PrintShadowByte("  Stack right redzone:   ", kAsanStackRightRedzoneMagic);
+  PrintShadowByte("  Stack partial redzone: ", kAsanStackPartialRedzoneMagic);
+  PrintShadowByte("  Stack after return:    ", kAsanStackAfterReturnMagic);
+  PrintShadowByte("  Stack use after scope: ", kAsanStackUseAfterScopeMagic);
+  PrintShadowByte("  Global redzone:        ", kAsanGlobalRedzoneMagic);
+  PrintShadowByte("  Global init order:     ", kAsanInitializationOrderMagic);
+  PrintShadowByte("  Poisoned by user:      ", kAsanUserPoisonedMemoryMagic);
+  PrintShadowByte("  ASan internal:         ", kAsanInternalHeapMagic);
+}
+
+static void PrintZoneForPointer(uptr ptr, uptr zone_ptr,
+                                const char *zone_name) {
+  if (zone_ptr) {
+    if (zone_name) {
+      Printf("malloc_zone_from_ptr(%p) = %p, which is %s\n",
+                 ptr, zone_ptr, zone_name);
+    } else {
+      Printf("malloc_zone_from_ptr(%p) = %p, which doesn't have a name\n",
+                 ptr, zone_ptr);
+    }
+  } else {
+    Printf("malloc_zone_from_ptr(%p) = 0\n", ptr);
+  }
+}
+
+// ---------------------- Address Descriptions ------------------- {{{1
+
+static bool IsASCII(unsigned char c) {
+  return /*0x00 <= c &&*/ c <= 0x7F;
+}
+
+// Check if the global is a zero-terminated ASCII string. If so, print it.
+static void PrintGlobalNameIfASCII(const __asan_global &g) {
+  for (uptr p = g.beg; p < g.beg + g.size - 1; p++) {
+    if (!IsASCII(*(unsigned char*)p)) return;
+  }
+  if (*(char*)(g.beg + g.size - 1) != 0) return;
+  Printf("  '%s' is ascii string '%s'\n", g.name, (char*)g.beg);
+}
+
+bool DescribeAddressRelativeToGlobal(uptr addr, const __asan_global &g) {
+  if (addr < g.beg - kGlobalAndStackRedzone) return false;
+  if (addr >= g.beg + g.size_with_redzone) return false;
+  Decorator d;
+  Printf("%s", d.Location());
+  Printf("%p is located ", (void*)addr);
+  if (addr < g.beg) {
+    Printf("%zd bytes to the left", g.beg - addr);
+  } else if (addr >= g.beg + g.size) {
+    Printf("%zd bytes to the right", addr - (g.beg + g.size));
+  } else {
+    Printf("%zd bytes inside", addr - g.beg);  // Can it happen?
+  }
+  Printf(" of global variable '%s' (0x%zx) of size %zu\n",
+             g.name, g.beg, g.size);
+  Printf("%s", d.EndLocation());
+  PrintGlobalNameIfASCII(g);
+  return true;
+}
+
+bool DescribeAddressIfShadow(uptr addr) {
+  if (AddrIsInMem(addr))
+    return false;
+  static const char kAddrInShadowReport[] =
+      "Address %p is located in the %s.\n";
+  if (AddrIsInShadowGap(addr)) {
+    Printf(kAddrInShadowReport, addr, "shadow gap area");
+    return true;
+  }
+  if (AddrIsInHighShadow(addr)) {
+    Printf(kAddrInShadowReport, addr, "high shadow area");
+    return true;
+  }
+  if (AddrIsInLowShadow(addr)) {
+    Printf(kAddrInShadowReport, addr, "low shadow area");
+    return true;
+  }
+  CHECK(0 && "Address is not in memory and not in shadow?");
+  return false;
+}
+
+bool DescribeAddressIfStack(uptr addr, uptr access_size) {
+  AsanThread *t = asanThreadRegistry().FindThreadByStackAddress(addr);
+  if (!t) return false;
+  const sptr kBufSize = 4095;
+  char buf[kBufSize];
+  uptr offset = 0;
+  const char *frame_descr = t->GetFrameNameByAddr(addr, &offset);
+  // This string is created by the compiler and has the following form:
+  // "FunctioName n alloc_1 alloc_2 ... alloc_n"
+  // where alloc_i looks like "offset size len ObjectName ".
+  CHECK(frame_descr);
+  // Report the function name and the offset.
+  const char *name_end = internal_strchr(frame_descr, ' ');
+  CHECK(name_end);
+  buf[0] = 0;
+  internal_strncat(buf, frame_descr,
+                   Min(kBufSize,
+                       static_cast<sptr>(name_end - frame_descr)));
+  Decorator d;
+  Printf("%s", d.Location());
+  Printf("Address %p is located at offset %zu "
+             "in frame <%s> of T%d's stack:\n",
+             (void*)addr, offset, Demangle(buf), t->tid());
+  Printf("%s", d.EndLocation());
+  // Report the number of stack objects.
+  char *p;
+  uptr n_objects = internal_simple_strtoll(name_end, &p, 10);
+  CHECK(n_objects > 0);
+  Printf("  This frame has %zu object(s):\n", n_objects);
+  // Report all objects in this frame.
+  for (uptr i = 0; i < n_objects; i++) {
+    uptr beg, size;
+    sptr len;
+    beg  = internal_simple_strtoll(p, &p, 10);
+    size = internal_simple_strtoll(p, &p, 10);
+    len  = internal_simple_strtoll(p, &p, 10);
+    if (beg <= 0 || size <= 0 || len < 0 || *p != ' ') {
+      Printf("AddressSanitizer can't parse the stack frame "
+                 "descriptor: |%s|\n", frame_descr);
+      break;
+    }
+    p++;
+    buf[0] = 0;
+    internal_strncat(buf, p, Min(kBufSize, len));
+    p += len;
+    Printf("    [%zu, %zu) '%s'\n", beg, beg + size, buf);
+  }
+  Printf("HINT: this may be a false positive if your program uses "
+             "some custom stack unwind mechanism or swapcontext\n"
+             "      (longjmp and C++ exceptions *are* supported)\n");
+  DescribeThread(t->summary());
+  return true;
+}
+
+static void DescribeAccessToHeapChunk(AsanChunkView chunk, uptr addr,
+                                      uptr access_size) {
+  uptr offset;
+  Decorator d;
+  Printf("%s", d.Location());
+  Printf("%p is located ", (void*)addr);
+  if (chunk.AddrIsInside(addr, access_size, &offset)) {
+    Printf("%zu bytes inside of", offset);
+  } else if (chunk.AddrIsAtLeft(addr, access_size, &offset)) {
+    Printf("%zu bytes to the left of", offset);
+  } else if (chunk.AddrIsAtRight(addr, access_size, &offset)) {
+    Printf("%zu bytes to the right of", offset);
+  } else {
+    Printf(" somewhere around (this is AddressSanitizer bug!)");
+  }
+  Printf(" %zu-byte region [%p,%p)\n", chunk.UsedSize(),
+         (void*)(chunk.Beg()), (void*)(chunk.End()));
+  Printf("%s", d.EndLocation());
+}
+
+// Return " (thread_name) " or an empty string if the name is empty.
+const char *ThreadNameWithParenthesis(AsanThreadSummary *t, char buff[],
+                                      uptr buff_len) {
+  const char *name = t->name();
+  if (*name == 0) return "";
+  buff[0] = 0;
+  internal_strncat(buff, " (", 3);
+  internal_strncat(buff, name, buff_len - 4);
+  internal_strncat(buff, ")", 2);
+  return buff;
+}
+
+const char *ThreadNameWithParenthesis(u32 tid, char buff[],
+                                      uptr buff_len) {
+  if (tid == kInvalidTid) return "";
+  AsanThreadSummary *t = asanThreadRegistry().FindByTid(tid);
+  return ThreadNameWithParenthesis(t, buff, buff_len);
+}
+
+void DescribeHeapAddress(uptr addr, uptr access_size) {
+  AsanChunkView chunk = FindHeapChunkByAddress(addr);
+  if (!chunk.IsValid()) return;
+  DescribeAccessToHeapChunk(chunk, addr, access_size);
+  CHECK(chunk.AllocTid() != kInvalidTid);
+  AsanThreadSummary *alloc_thread =
+      asanThreadRegistry().FindByTid(chunk.AllocTid());
+  StackTrace alloc_stack;
+  chunk.GetAllocStack(&alloc_stack);
+  AsanThread *t = asanThreadRegistry().GetCurrent();
+  CHECK(t);
+  char tname[128];
+  Decorator d;
+  if (chunk.FreeTid() != kInvalidTid) {
+    AsanThreadSummary *free_thread =
+        asanThreadRegistry().FindByTid(chunk.FreeTid());
+    Printf("%sfreed by thread T%d%s here:%s\n", d.Allocation(),
+           free_thread->tid(),
+           ThreadNameWithParenthesis(free_thread, tname, sizeof(tname)),
+           d.EndAllocation());
+    StackTrace free_stack;
+    chunk.GetFreeStack(&free_stack);
+    PrintStack(&free_stack);
+    Printf("%spreviously allocated by thread T%d%s here:%s\n",
+           d.Allocation(), alloc_thread->tid(),
+           ThreadNameWithParenthesis(alloc_thread, tname, sizeof(tname)),
+           d.EndAllocation());
+    PrintStack(&alloc_stack);
+    DescribeThread(t->summary());
+    DescribeThread(free_thread);
+    DescribeThread(alloc_thread);
+  } else {
+    Printf("%sallocated by thread T%d%s here:%s\n", d.Allocation(),
+           alloc_thread->tid(),
+           ThreadNameWithParenthesis(alloc_thread, tname, sizeof(tname)),
+           d.EndAllocation());
+    PrintStack(&alloc_stack);
+    DescribeThread(t->summary());
+    DescribeThread(alloc_thread);
+  }
+}
+
+void DescribeAddress(uptr addr, uptr access_size) {
+  // Check if this is shadow or shadow gap.
+  if (DescribeAddressIfShadow(addr))
+    return;
+  CHECK(AddrIsInMem(addr));
+  if (DescribeAddressIfGlobal(addr))
+    return;
+  if (DescribeAddressIfStack(addr, access_size))
+    return;
+  // Assume it is a heap address.
+  DescribeHeapAddress(addr, access_size);
+}
+
+// ------------------- Thread description -------------------- {{{1
+
+void DescribeThread(AsanThreadSummary *summary) {
+  CHECK(summary);
+  // No need to announce the main thread.
+  if (summary->tid() == 0 || summary->announced()) {
+    return;
+  }
+  summary->set_announced(true);
+  char tname[128];
+  Printf("Thread T%d%s", summary->tid(),
+         ThreadNameWithParenthesis(summary->tid(), tname, sizeof(tname)));
+  Printf(" created by T%d%s here:\n",
+         summary->parent_tid(),
+         ThreadNameWithParenthesis(summary->parent_tid(),
+                                   tname, sizeof(tname)));
+  PrintStack(summary->stack());
+  // Recursively described parent thread if needed.
+  if (flags()->print_full_thread_history) {
+    AsanThreadSummary *parent_summary =
+        asanThreadRegistry().FindByTid(summary->parent_tid());
+    DescribeThread(parent_summary);
+  }
+}
+
+// -------------------- Different kinds of reports ----------------- {{{1
+
+// Use ScopedInErrorReport to run common actions just before and
+// immediately after printing error report.
+class ScopedInErrorReport {
+ public:
+  ScopedInErrorReport() {
+    static atomic_uint32_t num_calls;
+    static u32 reporting_thread_tid;
+    if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
+      // Do not print more than one report, otherwise they will mix up.
+      // Error reporting functions shouldn't return at this situation, as
+      // they are defined as no-return.
+      Report("AddressSanitizer: while reporting a bug found another one."
+                 "Ignoring.\n");
+      u32 current_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
+      if (current_tid != reporting_thread_tid) {
+        // ASan found two bugs in different threads simultaneously. Sleep
+        // long enough to make sure that the thread which started to print
+        // an error report will finish doing it.
+        SleepForSeconds(Max(100, flags()->sleep_before_dying + 1));
+      }
+      // If we're still not dead for some reason, use raw Exit() instead of
+      // Die() to bypass any additional checks.
+      Exit(flags()->exitcode);
+    }
+    ASAN_ON_ERROR();
+    reporting_thread_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
+    Printf("===================================================="
+           "=============\n");
+    if (reporting_thread_tid != kInvalidTid) {
+      // We started reporting an error message. Stop using the fake stack
+      // in case we call an instrumented function from a symbolizer.
+      AsanThread *curr_thread = asanThreadRegistry().GetCurrent();
+      CHECK(curr_thread);
+      curr_thread->fake_stack().StopUsingFakeStack();
+    }
+  }
+  // Destructor is NORETURN, as functions that report errors are.
+  NORETURN ~ScopedInErrorReport() {
+    // Make sure the current thread is announced.
+    AsanThread *curr_thread = asanThreadRegistry().GetCurrent();
+    if (curr_thread) {
+      DescribeThread(curr_thread->summary());
+    }
+    // Print memory stats.
+    __asan_print_accumulated_stats();
+    if (error_report_callback) {
+      error_report_callback(error_message_buffer);
+    }
+    Report("ABORTING\n");
+    Die();
+  }
+};
+
+void ReportSIGSEGV(uptr pc, uptr sp, uptr bp, uptr addr) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: SEGV on unknown address %p"
+             " (pc %p sp %p bp %p T%d)\n",
+             (void*)addr, (void*)pc, (void*)sp, (void*)bp,
+             asanThreadRegistry().GetCurrentTidOrInvalid());
+  Printf("%s", d.EndWarning());
+  Printf("AddressSanitizer can not provide additional info.\n");
+  GET_STACK_TRACE_FATAL(pc, bp);
+  PrintStack(&stack);
+}
+
+void ReportDoubleFree(uptr addr, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: attempting double-free on %p:\n", addr);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportFreeNotMalloced(uptr addr, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: attempting free on address "
+             "which was not malloc()-ed: %p\n", addr);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportAllocTypeMismatch(uptr addr, StackTrace *stack,
+                             AllocType alloc_type,
+                             AllocType dealloc_type) {
+  static const char *alloc_names[] =
+    {"INVALID", "malloc", "operator new", "operator new []"};
+  static const char *dealloc_names[] =
+    {"INVALID", "free", "operator delete", "operator delete []"};
+  CHECK_NE(alloc_type, dealloc_type);
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: alloc-dealloc-mismatch (%s vs %s) on %p\n",
+        alloc_names[alloc_type], dealloc_names[dealloc_type], addr);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+  Report("HINT: if you don't care about these warnings you may set "
+         "ASAN_OPTIONS=alloc_dealloc_mismatch=0\n");
+}
+
+void ReportMallocUsableSizeNotOwned(uptr addr, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: attempting to call "
+             "malloc_usable_size() for pointer which is "
+             "not owned: %p\n", addr);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportAsanGetAllocatedSizeNotOwned(uptr addr, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: attempting to call "
+             "__asan_get_allocated_size() for pointer which is "
+             "not owned: %p\n", addr);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportStringFunctionMemoryRangesOverlap(
+    const char *function, const char *offset1, uptr length1,
+    const char *offset2, uptr length2, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: %s-param-overlap: "
+             "memory ranges [%p,%p) and [%p, %p) overlap\n", \
+             function, offset1, offset1 + length1, offset2, offset2 + length2);
+  Printf("%s", d.EndWarning());
+  PrintStack(stack);
+  DescribeAddress((uptr)offset1, length1);
+  DescribeAddress((uptr)offset2, length2);
+}
+
+// ----------------------- Mac-specific reports ----------------- {{{1
+
+void WarnMacFreeUnallocated(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+  // Just print a warning here.
+  Printf("free_common(%p) -- attempting to free unallocated memory.\n"
+             "AddressSanitizer is ignoring this error on Mac OS now.\n",
+             addr);
+  PrintZoneForPointer(addr, zone_ptr, zone_name);
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportMacMzReallocUnknown(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Printf("mz_realloc(%p) -- attempting to realloc unallocated memory.\n"
+             "This is an unrecoverable problem, exiting now.\n",
+             addr);
+  PrintZoneForPointer(addr, zone_ptr, zone_name);
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+void ReportMacCfReallocUnknown(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack) {
+  ScopedInErrorReport in_report;
+  Printf("cf_realloc(%p) -- attempting to realloc unallocated memory.\n"
+             "This is an unrecoverable problem, exiting now.\n",
+             addr);
+  PrintZoneForPointer(addr, zone_ptr, zone_name);
+  PrintStack(stack);
+  DescribeHeapAddress(addr, 1);
+}
+
+}  // namespace __asan
+
+// --------------------------- Interface --------------------- {{{1
+using namespace __asan;  // NOLINT
+
+void __asan_report_error(uptr pc, uptr bp, uptr sp,
+                         uptr addr, bool is_write, uptr access_size) {
+  ScopedInErrorReport in_report;
+
+  // Determine the error type.
+  const char *bug_descr = "unknown-crash";
+  if (AddrIsInMem(addr)) {
+    u8 *shadow_addr = (u8*)MemToShadow(addr);
+    // If we are accessing 16 bytes, look at the second shadow byte.
+    if (*shadow_addr == 0 && access_size > SHADOW_GRANULARITY)
+      shadow_addr++;
+    // If we are in the partial right redzone, look at the next shadow byte.
+    if (*shadow_addr > 0 && *shadow_addr < 128)
+      shadow_addr++;
+    switch (*shadow_addr) {
+      case kAsanHeapLeftRedzoneMagic:
+      case kAsanHeapRightRedzoneMagic:
+        bug_descr = "heap-buffer-overflow";
+        break;
+      case kAsanHeapFreeMagic:
+        bug_descr = "heap-use-after-free";
+        break;
+      case kAsanStackLeftRedzoneMagic:
+        bug_descr = "stack-buffer-underflow";
+        break;
+      case kAsanInitializationOrderMagic:
+        bug_descr = "initialization-order-fiasco";
+        break;
+      case kAsanStackMidRedzoneMagic:
+      case kAsanStackRightRedzoneMagic:
+      case kAsanStackPartialRedzoneMagic:
+        bug_descr = "stack-buffer-overflow";
+        break;
+      case kAsanStackAfterReturnMagic:
+        bug_descr = "stack-use-after-return";
+        break;
+      case kAsanUserPoisonedMemoryMagic:
+        bug_descr = "use-after-poison";
+        break;
+      case kAsanStackUseAfterScopeMagic:
+        bug_descr = "stack-use-after-scope";
+        break;
+      case kAsanGlobalRedzoneMagic:
+        bug_descr = "global-buffer-overflow";
+        break;
+    }
+  }
+  Decorator d;
+  Printf("%s", d.Warning());
+  Report("ERROR: AddressSanitizer: %s on address "
+             "%p at pc 0x%zx bp 0x%zx sp 0x%zx\n",
+             bug_descr, (void*)addr, pc, bp, sp);
+  Printf("%s", d.EndWarning());
+
+  u32 curr_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
+  char tname[128];
+  Printf("%s%s of size %zu at %p thread T%d%s%s\n",
+         d.Access(),
+         access_size ? (is_write ? "WRITE" : "READ") : "ACCESS",
+         access_size, (void*)addr, curr_tid,
+         ThreadNameWithParenthesis(curr_tid, tname, sizeof(tname)),
+         d.EndAccess());
+
+  GET_STACK_TRACE_FATAL(pc, bp);
+  PrintStack(&stack);
+
+  DescribeAddress(addr, access_size);
+
+  PrintShadowMemoryForAddress(addr);
+}
+
+void NOINLINE __asan_set_error_report_callback(void (*callback)(const char*)) {
+  error_report_callback = callback;
+  if (callback) {
+    error_message_buffer_size = 1 << 16;
+    error_message_buffer =
+        (char*)MmapOrDie(error_message_buffer_size, __FUNCTION__);
+    error_message_buffer_pos = 0;
+  }
+}
+
+void __asan_describe_address(uptr addr) {
+  DescribeAddress(addr, 1);
+}
+
+#if !SANITIZER_SUPPORTS_WEAK_HOOKS
+// Provide default implementation of __asan_on_error that does nothing
+// and may be overriden by user.
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE NOINLINE
+void __asan_on_error() {}
+#endif
diff --git a/lib/asan/asan_report.h b/lib/asan/asan_report.h
new file mode 100644
index 000000000000..f0617f91970e
--- /dev/null
+++ b/lib/asan/asan_report.h
@@ -0,0 +1,57 @@
+//===-- asan_report.h -------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// ASan-private header for error reporting functions.
+//===----------------------------------------------------------------------===//
+
+#include "asan_allocator.h"
+#include "asan_internal.h"
+#include "asan_thread.h"
+#include "sanitizer/asan_interface.h"
+
+namespace __asan {
+
+// The following functions prints address description depending
+// on the memory type (shadow/heap/stack/global).
+void DescribeHeapAddress(uptr addr, uptr access_size);
+bool DescribeAddressIfGlobal(uptr addr);
+bool DescribeAddressRelativeToGlobal(uptr addr, const __asan_global &g);
+bool DescribeAddressIfShadow(uptr addr);
+bool DescribeAddressIfStack(uptr addr, uptr access_size);
+// Determines memory type on its own.
+void DescribeAddress(uptr addr, uptr access_size);
+
+void DescribeThread(AsanThreadSummary *summary);
+
+// Different kinds of error reports.
+void NORETURN ReportSIGSEGV(uptr pc, uptr sp, uptr bp, uptr addr);
+void NORETURN ReportDoubleFree(uptr addr, StackTrace *stack);
+void NORETURN ReportFreeNotMalloced(uptr addr, StackTrace *stack);
+void NORETURN ReportAllocTypeMismatch(uptr addr, StackTrace *stack,
+                                      AllocType alloc_type,
+                                      AllocType dealloc_type);
+void NORETURN ReportMallocUsableSizeNotOwned(uptr addr,
+                                             StackTrace *stack);
+void NORETURN ReportAsanGetAllocatedSizeNotOwned(uptr addr,
+                                                 StackTrace *stack);
+void NORETURN ReportStringFunctionMemoryRangesOverlap(
+    const char *function, const char *offset1, uptr length1,
+    const char *offset2, uptr length2, StackTrace *stack);
+
+// Mac-specific errors and warnings.
+void WarnMacFreeUnallocated(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack);
+void NORETURN ReportMacMzReallocUnknown(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack);
+void NORETURN ReportMacCfReallocUnknown(
+    uptr addr, uptr zone_ptr, const char *zone_name, StackTrace *stack);
+
+}  // namespace __asan
diff --git a/lib/asan/asan_rtl.cc b/lib/asan/asan_rtl.cc
index 34324fa16d08..11adbee5bdea 100644
--- a/lib/asan/asan_rtl.cc
+++ b/lib/asan/asan_rtl.cc
@@ -13,29 +13,29 @@
 //===----------------------------------------------------------------------===//
 #include "asan_allocator.h"
 #include "asan_interceptors.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_mapping.h"
+#include "asan_report.h"
 #include "asan_stack.h"
 #include "asan_stats.h"
 #include "asan_thread.h"
 #include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
 #include "sanitizer_common/sanitizer_atomic.h"
 #include "sanitizer_common/sanitizer_flags.h"
 #include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
 
-namespace __sanitizer {
-using namespace __asan;
+namespace __asan {
 
-void Die() {
+static void AsanDie() {
   static atomic_uint32_t num_calls;
   if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
     // Don't die twice - run a busy loop.
     while (1) { }
   }
   if (flags()->sleep_before_dying) {
-    Report("Sleeping for %zd second(s)\n", flags()->sleep_before_dying);
+    Report("Sleeping for %d second(s)\n", flags()->sleep_before_dying);
     SleepForSeconds(flags()->sleep_before_dying);
   }
   if (flags()->unmap_shadow_on_exit)
@@ -47,19 +47,17 @@ void Die() {
   Exit(flags()->exitcode);
 }
 
-void CheckFailed(const char *file, int line, const char *cond, u64 v1, u64 v2) {
-  AsanReport("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n",
+static void AsanCheckFailed(const char *file, int line, const char *cond,
+                            u64 v1, u64 v2) {
+  Report("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n",
              file, line, cond, (uptr)v1, (uptr)v2);
+  // FIXME: check for infinite recursion without a thread-local counter here.
   PRINT_CURRENT_STACK();
-  ShowStatsAndAbort();
+  Die();
 }
 
-}  // namespace __sanitizer
-
-namespace __asan {
-
 // -------------------------- Flags ------------------------- {{{1
-static const int kMallocContextSize = 30;
+static const int kDeafultMallocContextSize = 30;
 
 static Flags asan_flags;
 
@@ -67,6 +65,10 @@ Flags *flags() {
   return &asan_flags;
 }
 
+static const char *MaybeCallAsanDefaultOptions() {
+  return (&__asan_default_options) ? __asan_default_options() : "";
+}
+
 static void ParseFlagsFromString(Flags *f, const char *str) {
   ParseFlag(str, &f->quarantine_size, "quarantine_size");
   ParseFlag(str, &f->symbolize, "symbolize");
@@ -77,8 +79,9 @@ static void ParseFlagsFromString(Flags *f, const char *str) {
 
   ParseFlag(str, &f->debug, "debug");
   ParseFlag(str, &f->report_globals, "report_globals");
+  ParseFlag(str, &f->check_initialization_order, "initialization_order");
   ParseFlag(str, &f->malloc_context_size, "malloc_context_size");
-  CHECK(f->malloc_context_size <= kMallocContextSize);
+  CHECK((uptr)f->malloc_context_size <= kStackTraceMax);
 
   ParseFlag(str, &f->replace_str, "replace_str");
   ParseFlag(str, &f->replace_intrin, "replace_intrin");
@@ -96,22 +99,28 @@ static void ParseFlagsFromString(Flags *f, const char *str) {
   ParseFlag(str, &f->abort_on_error, "abort_on_error");
   ParseFlag(str, &f->atexit, "atexit");
   ParseFlag(str, &f->disable_core, "disable_core");
+  ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix");
+  ParseFlag(str, &f->allow_reexec, "allow_reexec");
+  ParseFlag(str, &f->print_full_thread_history, "print_full_thread_history");
+  ParseFlag(str, &f->log_path, "log_path");
+  ParseFlag(str, &f->fast_unwind_on_fatal, "fast_unwind_on_fatal");
+  ParseFlag(str, &f->fast_unwind_on_malloc, "fast_unwind_on_malloc");
+  ParseFlag(str, &f->poison_heap, "poison_heap");
+  ParseFlag(str, &f->alloc_dealloc_mismatch, "alloc_dealloc_mismatch");
+  ParseFlag(str, &f->use_stack_depot, "use_stack_depot");
 }
 
-extern "C" {
-const char* WEAK __asan_default_options() { return ""; }
-}  // extern "C"
-
 void InitializeFlags(Flags *f, const char *env) {
   internal_memset(f, 0, sizeof(*f));
 
-  f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 24 : 1UL << 28;
+  f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 26 : 1UL << 28;
   f->symbolize = false;
   f->verbosity = 0;
-  f->redzone = (ASAN_LOW_MEMORY) ? 64 : 128;
+  f->redzone = ASAN_ALLOCATOR_VERSION == 2 ? 16 : (ASAN_LOW_MEMORY) ? 64 : 128;
   f->debug = false;
   f->report_globals = 1;
-  f->malloc_context_size = kMallocContextSize;
+  f->check_initialization_order = true;
+  f->malloc_context_size = kDeafultMallocContextSize;
   f->replace_str = true;
   f->replace_intrin = true;
   f->replace_cfallocator = true;
@@ -127,13 +136,24 @@ void InitializeFlags(Flags *f, const char *env) {
   f->unmap_shadow_on_exit = false;
   f->abort_on_error = false;
   f->atexit = false;
-  f->disable_core = (__WORDSIZE == 64);
+  f->disable_core = (SANITIZER_WORDSIZE == 64);
+  f->strip_path_prefix = "";
+  f->allow_reexec = true;
+  f->print_full_thread_history = true;
+  f->log_path = 0;
+  f->fast_unwind_on_fatal = false;
+  f->fast_unwind_on_malloc = true;
+  f->poison_heap = true;
+  // Turn off alloc/dealloc mismatch checker on Mac for now.
+  // TODO(glider): Fix known issues and enable this back.
+  f->alloc_dealloc_mismatch = (ASAN_MAC == 0);
+  f->use_stack_depot = true;  // Only affects allocator2.
 
   // Override from user-specified string.
-  ParseFlagsFromString(f, __asan_default_options());
+  ParseFlagsFromString(f, MaybeCallAsanDefaultOptions());
   if (flags()->verbosity) {
     Report("Using the defaults from __asan_default_options: %s\n",
-           __asan_default_options());
+           MaybeCallAsanDefaultOptions());
   }
 
   // Override from command line.
@@ -144,10 +164,6 @@ void InitializeFlags(Flags *f, const char *env) {
 int asan_inited;
 bool asan_init_is_running;
 void (*death_callback)(void);
-static void (*error_report_callback)(const char*);
-char *error_message_buffer = 0;
-uptr error_message_buffer_pos = 0;
-uptr error_message_buffer_size = 0;
 
 // -------------------------- Misc ---------------- {{{1
 void ShowStatsAndAbort() {
@@ -155,146 +171,23 @@ void ShowStatsAndAbort() {
   Die();
 }
 
-static void PrintBytes(const char *before, uptr *a) {
-  u8 *bytes = (u8*)a;
-  uptr byte_num = (__WORDSIZE) / 8;
-  AsanPrintf("%s%p:", before, (void*)a);
-  for (uptr i = 0; i < byte_num; i++) {
-    AsanPrintf(" %x%x", bytes[i] >> 4, bytes[i] & 15);
-  }
-  AsanPrintf("\n");
-}
-
-void AppendToErrorMessageBuffer(const char *buffer) {
-  if (error_message_buffer) {
-    uptr length = internal_strlen(buffer);
-    CHECK_GE(error_message_buffer_size, error_message_buffer_pos);
-    uptr remaining = error_message_buffer_size - error_message_buffer_pos;
-    internal_strncpy(error_message_buffer + error_message_buffer_pos,
-                     buffer, remaining);
-    error_message_buffer[error_message_buffer_size - 1] = '\0';
-    // FIXME: reallocate the buffer instead of truncating the message.
-    error_message_buffer_pos += remaining > length ? length : remaining;
-  }
-}
-
 // ---------------------- mmap -------------------- {{{1
 // Reserve memory range [beg, end].
 static void ReserveShadowMemoryRange(uptr beg, uptr end) {
-  CHECK((beg % kPageSize) == 0);
-  CHECK(((end + 1) % kPageSize) == 0);
+  CHECK((beg % GetPageSizeCached()) == 0);
+  CHECK(((end + 1) % GetPageSizeCached()) == 0);
   uptr size = end - beg + 1;
   void *res = MmapFixedNoReserve(beg, size);
-  CHECK(res == (void*)beg && "ReserveShadowMemoryRange failed");
-}
-
-// ---------------------- LowLevelAllocator ------------- {{{1
-void *LowLevelAllocator::Allocate(uptr size) {
-  CHECK((size & (size - 1)) == 0 && "size must be a power of two");
-  if (allocated_end_ - allocated_current_ < (sptr)size) {
-    uptr size_to_allocate = Max(size, kPageSize);
-    allocated_current_ =
-        (char*)MmapOrDie(size_to_allocate, __FUNCTION__);
-    allocated_end_ = allocated_current_ + size_to_allocate;
-    PoisonShadow((uptr)allocated_current_, size_to_allocate,
-                 kAsanInternalHeapMagic);
-  }
-  CHECK(allocated_end_ - allocated_current_ >= (sptr)size);
-  void *res = allocated_current_;
-  allocated_current_ += size;
-  return res;
-}
-
-// ---------------------- DescribeAddress -------------------- {{{1
-static bool DescribeStackAddress(uptr addr, uptr access_size) {
-  AsanThread *t = asanThreadRegistry().FindThreadByStackAddress(addr);
-  if (!t) return false;
-  const sptr kBufSize = 4095;
-  char buf[kBufSize];
-  uptr offset = 0;
-  const char *frame_descr = t->GetFrameNameByAddr(addr, &offset);
-  // This string is created by the compiler and has the following form:
-  // "FunctioName n alloc_1 alloc_2 ... alloc_n"
-  // where alloc_i looks like "offset size len ObjectName ".
-  CHECK(frame_descr);
-  // Report the function name and the offset.
-  const char *name_end = internal_strchr(frame_descr, ' ');
-  CHECK(name_end);
-  buf[0] = 0;
-  internal_strncat(buf, frame_descr,
-                   Min(kBufSize,
-                       static_cast<sptr>(name_end - frame_descr)));
-  AsanPrintf("Address %p is located at offset %zu "
-             "in frame <%s> of T%d's stack:\n",
-             (void*)addr, offset, buf, t->tid());
-  // Report the number of stack objects.
-  char *p;
-  uptr n_objects = internal_simple_strtoll(name_end, &p, 10);
-  CHECK(n_objects > 0);
-  AsanPrintf("  This frame has %zu object(s):\n", n_objects);
-  // Report all objects in this frame.
-  for (uptr i = 0; i < n_objects; i++) {
-    uptr beg, size;
-    sptr len;
-    beg  = internal_simple_strtoll(p, &p, 10);
-    size = internal_simple_strtoll(p, &p, 10);
-    len  = internal_simple_strtoll(p, &p, 10);
-    if (beg <= 0 || size <= 0 || len < 0 || *p != ' ') {
-      AsanPrintf("AddressSanitizer can't parse the stack frame "
-                 "descriptor: |%s|\n", frame_descr);
-      break;
-    }
-    p++;
-    buf[0] = 0;
-    internal_strncat(buf, p, Min(kBufSize, len));
-    p += len;
-    AsanPrintf("    [%zu, %zu) '%s'\n", beg, beg + size, buf);
-  }
-  AsanPrintf("HINT: this may be a false positive if your program uses "
-             "some custom stack unwind mechanism\n"
-             "      (longjmp and C++ exceptions *are* supported)\n");
-  t->summary()->Announce();
-  return true;
-}
-
-static bool DescribeAddrIfShadow(uptr addr) {
-  if (AddrIsInMem(addr))
-    return false;
-  static const char kAddrInShadowReport[] =
-      "Address %p is located in the %s.\n";
-  if (AddrIsInShadowGap(addr)) {
-    AsanPrintf(kAddrInShadowReport, addr, "shadow gap area");
-    return true;
-  }
-  if (AddrIsInHighShadow(addr)) {
-    AsanPrintf(kAddrInShadowReport, addr, "high shadow area");
-    return true;
-  }
-  if (AddrIsInLowShadow(addr)) {
-    AsanPrintf(kAddrInShadowReport, addr, "low shadow area");
-    return true;
+  if (res != (void*)beg) {
+    Report("ReserveShadowMemoryRange failed while trying to map 0x%zx bytes. "
+           "Perhaps you're using ulimit -v\n", size);
+    Abort();
   }
-
-  CHECK(0);  // Unreachable.
-  return false;
 }
 
-static NOINLINE void DescribeAddress(uptr addr, uptr access_size) {
-  // Check if this is shadow or shadow gap.
-  if (DescribeAddrIfShadow(addr))
-    return;
-
-  CHECK(AddrIsInMem(addr));
-
-  // Check if this is a global.
-  if (DescribeAddrIfGlobal(addr))
-    return;
-
-  if (DescribeStackAddress(addr, access_size))
-    return;
-
-  // finally, check if this is a heap.
-  DescribeHeapAddress(addr, access_size);
+// --------------- LowLevelAllocateCallbac ---------- {{{1
+static void OnLowLevelAllocate(uptr ptr, uptr size) {
+  PoisonShadow(ptr, size, kAsanInternalHeapMagic);
 }
 
 // -------------------------- Run-time entry ------------------- {{{1
@@ -325,29 +218,48 @@ ASAN_REPORT_ERROR(store, true, 16)
 // time.
 static NOINLINE void force_interface_symbols() {
   volatile int fake_condition = 0;  // prevent dead condition elimination.
-  if (fake_condition) {
-    __asan_report_load1(0);
-    __asan_report_load2(0);
-    __asan_report_load4(0);
-    __asan_report_load8(0);
-    __asan_report_load16(0);
-    __asan_report_store1(0);
-    __asan_report_store2(0);
-    __asan_report_store4(0);
-    __asan_report_store8(0);
-    __asan_report_store16(0);
-    __asan_register_global(0, 0, 0);
-    __asan_register_globals(0, 0);
-    __asan_unregister_globals(0, 0);
-    __asan_set_death_callback(0);
-    __asan_set_error_report_callback(0);
-    __asan_handle_no_return();
+  // __asan_report_* functions are noreturn, so we need a switch to prevent
+  // the compiler from removing any of them.
+  switch (fake_condition) {
+    case 1: __asan_report_load1(0); break;
+    case 2: __asan_report_load2(0); break;
+    case 3: __asan_report_load4(0); break;
+    case 4: __asan_report_load8(0); break;
+    case 5: __asan_report_load16(0); break;
+    case 6: __asan_report_store1(0); break;
+    case 7: __asan_report_store2(0); break;
+    case 8: __asan_report_store4(0); break;
+    case 9: __asan_report_store8(0); break;
+    case 10: __asan_report_store16(0); break;
+    case 12: __asan_register_globals(0, 0); break;
+    case 13: __asan_unregister_globals(0, 0); break;
+    case 14: __asan_set_death_callback(0); break;
+    case 15: __asan_set_error_report_callback(0); break;
+    case 16: __asan_handle_no_return(); break;
+    case 17: __asan_address_is_poisoned(0); break;
+    case 18: __asan_get_allocated_size(0); break;
+    case 19: __asan_get_current_allocated_bytes(); break;
+    case 20: __asan_get_estimated_allocated_size(0); break;
+    case 21: __asan_get_free_bytes(); break;
+    case 22: __asan_get_heap_size(); break;
+    case 23: __asan_get_ownership(0); break;
+    case 24: __asan_get_unmapped_bytes(); break;
+    case 25: __asan_poison_memory_region(0, 0); break;
+    case 26: __asan_unpoison_memory_region(0, 0); break;
+    case 27: __asan_set_error_exit_code(0); break;
+    case 28: __asan_stack_free(0, 0, 0); break;
+    case 29: __asan_stack_malloc(0, 0); break;
+    case 30: __asan_before_dynamic_init(0, 0); break;
+    case 31: __asan_after_dynamic_init(); break;
+    case 32: __asan_poison_stack_memory(0, 0); break;
+    case 33: __asan_unpoison_stack_memory(0, 0); break;
+    case 34: __asan_region_is_poisoned(0, 0); break;
+    case 35: __asan_describe_address(0); break;
   }
 }
 
-// -------------------------- Init ------------------- {{{1
 static void asan_atexit() {
-  AsanPrintf("AddressSanitizer exit stats:\n");
+  Printf("AddressSanitizer exit stats:\n");
   __asan_print_accumulated_stats();
 }
 
@@ -356,7 +268,14 @@ static void asan_atexit() {
 // ---------------------- Interface ---------------- {{{1
 using namespace __asan;  // NOLINT
 
-int __asan_set_error_exit_code(int exit_code) {
+#if !SANITIZER_SUPPORTS_WEAK_HOOKS
+extern "C" {
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
+const char* __asan_default_options() { return ""; }
+}  // extern "C"
+#endif
+
+int NOINLINE __asan_set_error_exit_code(int exit_code) {
   int old = flags()->exitcode;
   flags()->exitcode = exit_code;
   return old;
@@ -366,8 +285,9 @@ void NOINLINE __asan_handle_no_return() {
   int local_stack;
   AsanThread *curr_thread = asanThreadRegistry().GetCurrent();
   CHECK(curr_thread);
+  uptr PageSize = GetPageSizeCached();
   uptr top = curr_thread->stack_top();
-  uptr bottom = ((uptr)&local_stack - kPageSize) & ~(kPageSize-1);
+  uptr bottom = ((uptr)&local_stack - PageSize) & ~(PageSize-1);
   PoisonShadow(bottom, top - bottom, 0);
 }
 
@@ -375,134 +295,35 @@ void NOINLINE __asan_set_death_callback(void (*callback)(void)) {
   death_callback = callback;
 }
 
-void NOINLINE __asan_set_error_report_callback(void (*callback)(const char*)) {
-  error_report_callback = callback;
-  if (callback) {
-    error_message_buffer_size = 1 << 16;
-    error_message_buffer =
-        (char*)MmapOrDie(error_message_buffer_size, __FUNCTION__);
-    error_message_buffer_pos = 0;
-  }
-}
-
-void __asan_report_error(uptr pc, uptr bp, uptr sp,
-                         uptr addr, bool is_write, uptr access_size) {
-  static atomic_uint32_t num_calls;
-  if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
-    // Do not print more than one report, otherwise they will mix up.
-    // We can not return here because the function is marked as never-return.
-    AsanPrintf("AddressSanitizer: while reporting a bug found another one."
-               "Ignoring.\n");
-    SleepForSeconds(5);
-    Die();
-  }
-
-  AsanPrintf("===================================================="
-             "=============\n");
-  const char *bug_descr = "unknown-crash";
-  if (AddrIsInMem(addr)) {
-    u8 *shadow_addr = (u8*)MemToShadow(addr);
-    // If we are accessing 16 bytes, look at the second shadow byte.
-    if (*shadow_addr == 0 && access_size > SHADOW_GRANULARITY)
-      shadow_addr++;
-    // If we are in the partial right redzone, look at the next shadow byte.
-    if (*shadow_addr > 0 && *shadow_addr < 128)
-      shadow_addr++;
-    switch (*shadow_addr) {
-      case kAsanHeapLeftRedzoneMagic:
-      case kAsanHeapRightRedzoneMagic:
-        bug_descr = "heap-buffer-overflow";
-        break;
-      case kAsanHeapFreeMagic:
-        bug_descr = "heap-use-after-free";
-        break;
-      case kAsanStackLeftRedzoneMagic:
-        bug_descr = "stack-buffer-underflow";
-        break;
-      case kAsanStackMidRedzoneMagic:
-      case kAsanStackRightRedzoneMagic:
-      case kAsanStackPartialRedzoneMagic:
-        bug_descr = "stack-buffer-overflow";
-        break;
-      case kAsanStackAfterReturnMagic:
-        bug_descr = "stack-use-after-return";
-        break;
-      case kAsanUserPoisonedMemoryMagic:
-        bug_descr = "use-after-poison";
-        break;
-      case kAsanGlobalRedzoneMagic:
-        bug_descr = "global-buffer-overflow";
-        break;
-    }
-  }
-
-  AsanThread *curr_thread = asanThreadRegistry().GetCurrent();
-  u32 curr_tid = asanThreadRegistry().GetCurrentTidOrInvalid();
-
-  if (curr_thread) {
-    // We started reporting an error message. Stop using the fake stack
-    // in case we will call an instrumented function from a symbolizer.
-    curr_thread->fake_stack().StopUsingFakeStack();
-  }
-
-  AsanReport("ERROR: AddressSanitizer %s on address "
-             "%p at pc 0x%zx bp 0x%zx sp 0x%zx\n",
-             bug_descr, (void*)addr, pc, bp, sp);
-
-  AsanPrintf("%s of size %zu at %p thread T%d\n",
-             access_size ? (is_write ? "WRITE" : "READ") : "ACCESS",
-             access_size, (void*)addr, curr_tid);
-
-  if (flags()->debug) {
-    PrintBytes("PC: ", (uptr*)pc);
-  }
-
-  GET_STACK_TRACE_WITH_PC_AND_BP(kStackTraceMax, pc, bp);
-  stack.PrintStack();
-
-  DescribeAddress(addr, access_size);
-
-  if (AddrIsInMem(addr)) {
-    uptr shadow_addr = MemToShadow(addr);
-    AsanReport("ABORTING\n");
-    __asan_print_accumulated_stats();
-    AsanPrintf("Shadow byte and word:\n");
-    AsanPrintf("  %p: %x\n", (void*)shadow_addr, *(unsigned char*)shadow_addr);
-    uptr aligned_shadow = shadow_addr & ~(kWordSize - 1);
-    PrintBytes("  ", (uptr*)(aligned_shadow));
-    AsanPrintf("More shadow bytes:\n");
-    PrintBytes("  ", (uptr*)(aligned_shadow-4*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow-3*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow-2*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow-1*kWordSize));
-    PrintBytes("=>", (uptr*)(aligned_shadow+0*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow+1*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow+2*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow+3*kWordSize));
-    PrintBytes("  ", (uptr*)(aligned_shadow+4*kWordSize));
-  }
-  if (error_report_callback) {
-    error_report_callback(error_message_buffer);
-  }
-  Die();
-}
-
-
 void __asan_init() {
   if (asan_inited) return;
+  CHECK(!asan_init_is_running && "ASan init calls itself!");
   asan_init_is_running = true;
 
   // Make sure we are not statically linked.
   AsanDoesNotSupportStaticLinkage();
 
-  // Initialize flags.
+  // Install tool-specific callbacks in sanitizer_common.
+  SetDieCallback(AsanDie);
+  SetCheckFailedCallback(AsanCheckFailed);
+  SetPrintfAndReportCallback(AppendToErrorMessageBuffer);
+
+  // Initialize flags. This must be done early, because most of the
+  // initialization steps look at flags().
   const char *options = GetEnv("ASAN_OPTIONS");
   InitializeFlags(flags(), options);
+  __sanitizer_set_report_path(flags()->log_path);
 
   if (flags()->verbosity && options) {
     Report("Parsed ASAN_OPTIONS: %s\n", options);
   }
 
+  // Re-exec ourselves if we need to set additional env or command line args.
+  MaybeReexec();
+
+  // Setup internal allocator callback.
+  SetLowLevelAllocateCallback(OnLowLevelAllocate);
+
   if (flags()->atexit) {
     Atexit(asan_atexit);
   }
@@ -543,12 +364,13 @@ void __asan_init() {
   }
 
   uptr shadow_start = kLowShadowBeg;
-  if (kLowShadowBeg > 0) shadow_start -= kMmapGranularity;
+  if (kLowShadowBeg > 0) shadow_start -= GetMmapGranularity();
   uptr shadow_end = kHighShadowEnd;
   if (MemoryRangeIsAvailable(shadow_start, shadow_end)) {
     if (kLowShadowBeg != kLowShadowEnd) {
       // mmap the low shadow plus at least one page.
-      ReserveShadowMemoryRange(kLowShadowBeg - kMmapGranularity, kLowShadowEnd);
+      ReserveShadowMemoryRange(kLowShadowBeg - GetMmapGranularity(),
+                               kLowShadowEnd);
     }
     // mmap the high shadow.
     ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd);
@@ -563,6 +385,13 @@ void __asan_init() {
   }
 
   InstallSignalHandlers();
+  // Start symbolizer process if necessary.
+  if (flags()->symbolize) {
+    const char *external_symbolizer = GetEnv("ASAN_SYMBOLIZER_PATH");
+    if (external_symbolizer) {
+      InitializeExternalSymbolizer(external_symbolizer);
+    }
+  }
 
   // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
   // should be set to 1 prior to initializing the threads.
diff --git a/lib/asan/asan_stack.cc b/lib/asan/asan_stack.cc
index d6103c2c98fa..ebf22fd34ca1 100644
--- a/lib/asan/asan_stack.cc
+++ b/lib/asan/asan_stack.cc
@@ -11,222 +11,33 @@
 //
 // Code for ASan stack trace.
 //===----------------------------------------------------------------------===//
-#include "asan_interceptors.h"
-#include "asan_lock.h"
+#include "asan_flags.h"
 #include "asan_stack.h"
-#include "asan_thread.h"
-#include "asan_thread_registry.h"
-#include "sanitizer_common/sanitizer_procmaps.h"
-#include "sanitizer_common/sanitizer_symbolizer.h"
-
-#ifdef ASAN_USE_EXTERNAL_SYMBOLIZER
-extern bool
-ASAN_USE_EXTERNAL_SYMBOLIZER(const void *pc, char *out, int out_size);
-#endif
+#include "sanitizer/asan_interface.h"
 
 namespace __asan {
 
-// ----------------------- AsanStackTrace ----------------------------- {{{1
-// PCs in stack traces are actually the return addresses, that is,
-// addresses of the next instructions after the call. That's why we
-// decrement them.
-static uptr patch_pc(uptr pc) {
-#ifdef __arm__
-  // Cancel Thumb bit.
-  pc = pc & (~1);
-#endif
-  return pc - 1;
+static bool MaybeCallAsanSymbolize(const void *pc, char *out_buffer,
+                                   int out_size) {
+  return (&__asan_symbolize) ? __asan_symbolize(pc, out_buffer, out_size)
+                             : false;
 }
 
-#if defined(ASAN_USE_EXTERNAL_SYMBOLIZER)
-void AsanStackTrace::PrintStack(uptr *addr, uptr size) {
-  for (uptr i = 0; i < size && addr[i]; i++) {
-    uptr pc = addr[i];
-    if (i < size - 1 && addr[i + 1])
-      pc = patch_pc(pc);
-    char buff[4096];
-    ASAN_USE_EXTERNAL_SYMBOLIZER((void*)pc, buff, sizeof(buff));
-    AsanPrintf("  #%zu 0x%zx %s\n", i, pc, buff);
-  }
+void PrintStack(StackTrace *stack) {
+  stack->PrintStack(stack->trace, stack->size, flags()->symbolize,
+                    flags()->strip_path_prefix, MaybeCallAsanSymbolize);
 }
 
-#else  // ASAN_USE_EXTERNAL_SYMBOLIZER
-void AsanStackTrace::PrintStack(uptr *addr, uptr size) {
-  ProcessMaps proc_maps;
-  uptr frame_num = 0;
-  for (uptr i = 0; i < size && addr[i]; i++) {
-    uptr pc = addr[i];
-    if (i < size - 1 && addr[i + 1])
-      pc = patch_pc(pc);
-    AddressInfo addr_frames[64];
-    uptr addr_frames_num = 0;
-    if (flags()->symbolize) {
-      addr_frames_num = SymbolizeCode(pc, addr_frames,
-                                      ASAN_ARRAY_SIZE(addr_frames));
-    }
-    if (addr_frames_num > 0) {
-      for (uptr j = 0; j < addr_frames_num; j++) {
-        AddressInfo &info = addr_frames[j];
-        AsanPrintf("    #%zu 0x%zx", frame_num, pc);
-        if (info.function) {
-          AsanPrintf(" in %s", info.function);
-        }
-        if (info.file) {
-          AsanPrintf(" %s:%d:%d", info.file, info.line, info.column);
-        } else if (info.module) {
-          AsanPrintf(" (%s+0x%zx)", info.module, info.module_offset);
-        }
-        AsanPrintf("\n");
-        info.Clear();
-        frame_num++;
-      }
-    } else {
-      uptr offset;
-      char filename[4096];
-      if (proc_maps.GetObjectNameAndOffset(pc, &offset,
-                                           filename, sizeof(filename))) {
-        AsanPrintf("    #%zu 0x%zx (%s+0x%zx)\n", frame_num, pc, filename,
-                                                  offset);
-      } else {
-        AsanPrintf("    #%zu 0x%zx\n", frame_num, pc);
-      }
-      frame_num++;
-    }
-  }
-}
-#endif  // ASAN_USE_EXTERNAL_SYMBOLIZER
+}  // namespace __asan
 
-uptr AsanStackTrace::GetCurrentPc() {
-  return GET_CALLER_PC();
-}
+// ------------------ Interface -------------- {{{1
 
-void AsanStackTrace::FastUnwindStack(uptr pc, uptr bp) {
-  CHECK(size == 0 && trace[0] == pc);
-  size = 1;
-  if (!asan_inited) return;
-  AsanThread *t = asanThreadRegistry().GetCurrent();
-  if (!t) return;
-  uptr *frame = (uptr*)bp;
-  uptr *prev_frame = frame;
-  uptr *top = (uptr*)t->stack_top();
-  uptr *bottom = (uptr*)t->stack_bottom();
-  while (frame >= prev_frame &&
-         frame < top - 2 &&
-         frame > bottom &&
-         size < max_size) {
-    uptr pc1 = frame[1];
-    if (pc1 != pc) {
-      trace[size++] = pc1;
-    }
-    prev_frame = frame;
-    frame = (uptr*)frame[0];
-  }
+// Provide default implementation of __asan_symbolize that does nothing
+// and may be overriden by user if he wants to use his own symbolization.
+// ASan on Windows has its own implementation of this.
+#if !defined(_WIN32) && !SANITIZER_SUPPORTS_WEAK_HOOKS
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE NOINLINE
+bool __asan_symbolize(const void *pc, char *out_buffer, int out_size) {
+  return false;
 }
-
-// On 32-bits we don't compress stack traces.
-// On 64-bits we compress stack traces: if a given pc differes slightly from
-// the previous one, we record a 31-bit offset instead of the full pc.
-uptr AsanStackTrace::CompressStack(AsanStackTrace *stack,
-                                   u32 *compressed, uptr size) {
-#if __WORDSIZE == 32
-  // Don't compress, just copy.
-  uptr res = 0;
-  for (uptr i = 0; i < stack->size && i < size; i++) {
-    compressed[i] = stack->trace[i];
-    res++;
-  }
-  if (stack->size < size)
-    compressed[stack->size] = 0;
-#else  // 64 bits, compress.
-  uptr prev_pc = 0;
-  const uptr kMaxOffset = (1ULL << 30) - 1;
-  uptr c_index = 0;
-  uptr res = 0;
-  for (uptr i = 0, n = stack->size; i < n; i++) {
-    uptr pc = stack->trace[i];
-    if (!pc) break;
-    if ((s64)pc < 0) break;
-    // Printf("C pc[%zu] %zx\n", i, pc);
-    if (prev_pc - pc < kMaxOffset || pc - prev_pc < kMaxOffset) {
-      uptr offset = (s64)(pc - prev_pc);
-      offset |= (1U << 31);
-      if (c_index >= size) break;
-      // Printf("C co[%zu] offset %zx\n", i, offset);
-      compressed[c_index++] = offset;
-    } else {
-      uptr hi = pc >> 32;
-      uptr lo = (pc << 32) >> 32;
-      CHECK((hi & (1 << 31)) == 0);
-      if (c_index + 1 >= size) break;
-      // Printf("C co[%zu] hi/lo: %zx %zx\n", c_index, hi, lo);
-      compressed[c_index++] = hi;
-      compressed[c_index++] = lo;
-    }
-    res++;
-    prev_pc = pc;
-  }
-  if (c_index < size)
-    compressed[c_index] = 0;
-  if (c_index + 1 < size)
-    compressed[c_index + 1] = 0;
-#endif  // __WORDSIZE
-
-  // debug-only code
-#if 0
-  AsanStackTrace check_stack;
-  UncompressStack(&check_stack, compressed, size);
-  if (res < check_stack.size) {
-    Printf("res %zu check_stack.size %zu; c_size %zu\n", res,
-           check_stack.size, size);
-  }
-  // |res| may be greater than check_stack.size, because
-  // UncompressStack(CompressStack(stack)) eliminates the 0x0 frames.
-  CHECK(res >= check_stack.size);
-  CHECK(0 == REAL(memcmp)(check_stack.trace, stack->trace,
-                          check_stack.size * sizeof(uptr)));
 #endif
-
-  return res;
-}
-
-void AsanStackTrace::UncompressStack(AsanStackTrace *stack,
-                                     u32 *compressed, uptr size) {
-#if __WORDSIZE == 32
-  // Don't uncompress, just copy.
-  stack->size = 0;
-  for (uptr i = 0; i < size && i < kStackTraceMax; i++) {
-    if (!compressed[i]) break;
-    stack->size++;
-    stack->trace[i] = compressed[i];
-  }
-#else  // 64 bits, uncompress
-  uptr prev_pc = 0;
-  stack->size = 0;
-  for (uptr i = 0; i < size && stack->size < kStackTraceMax; i++) {
-    u32 x = compressed[i];
-    uptr pc = 0;
-    if (x & (1U << 31)) {
-      // Printf("U co[%zu] offset: %x\n", i, x);
-      // this is an offset
-      s32 offset = x;
-      offset = (offset << 1) >> 1;  // remove the 31-byte and sign-extend.
-      pc = prev_pc + offset;
-      CHECK(pc);
-    } else {
-      // CHECK(i + 1 < size);
-      if (i + 1 >= size) break;
-      uptr hi = x;
-      uptr lo = compressed[i+1];
-      // Printf("U co[%zu] hi/lo: %zx %zx\n", i, hi, lo);
-      i++;
-      pc = (hi << 32) | lo;
-      if (!pc) break;
-    }
-    // Printf("U pc[%zu] %zx\n", stack->size, pc);
-    stack->trace[stack->size++] = pc;
-    prev_pc = pc;
-  }
-#endif  // __WORDSIZE
-}
-
-}  // namespace __asan
diff --git a/lib/asan/asan_stack.h b/lib/asan/asan_stack.h
index 6ca9a0b28bfc..46c9f3408725 100644
--- a/lib/asan/asan_stack.h
+++ b/lib/asan/asan_stack.h
@@ -14,91 +14,53 @@
 #ifndef ASAN_STACK_H
 #define ASAN_STACK_H
 
-#include "asan_internal.h"
+#include "sanitizer_common/sanitizer_stacktrace.h"
+#include "asan_flags.h"
 
 namespace __asan {
 
-static const uptr kStackTraceMax = 64;
-
-struct AsanStackTrace {
-  uptr size;
-  uptr max_size;
-  uptr trace[kStackTraceMax];
-  static void PrintStack(uptr *addr, uptr size);
-  void PrintStack() {
-    PrintStack(this->trace, this->size);
-  }
-  void CopyTo(uptr *dst, uptr dst_size) {
-    for (uptr i = 0; i < size && i < dst_size; i++)
-      dst[i] = trace[i];
-    for (uptr i = size; i < dst_size; i++)
-      dst[i] = 0;
-  }
-
-  void CopyFrom(uptr *src, uptr src_size) {
-    size = src_size;
-    if (size > kStackTraceMax) size = kStackTraceMax;
-    for (uptr i = 0; i < size; i++) {
-      trace[i] = src[i];
-    }
-  }
-
-  void GetStackTrace(uptr max_s, uptr pc, uptr bp);
-
-  void FastUnwindStack(uptr pc, uptr bp);
-
-  static uptr GetCurrentPc();
-
-  static uptr CompressStack(AsanStackTrace *stack,
-                            u32 *compressed, uptr size);
-  static void UncompressStack(AsanStackTrace *stack,
-                              u32 *compressed, uptr size);
-};
+void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, bool fast);
+void PrintStack(StackTrace *stack);
 
 }  // namespace __asan
 
-// Use this macro if you want to print stack trace with the caller
-// of the current function in the top frame.
-#define GET_CALLER_PC_BP_SP \
-  uptr bp = GET_CURRENT_FRAME();              \
-  uptr pc = GET_CALLER_PC();                  \
-  uptr local_stack;                           \
-  uptr sp = (uptr)&local_stack
-
-// Use this macro if you want to print stack trace with the current
-// function in the top frame.
-#define GET_CURRENT_PC_BP_SP \
-  uptr bp = GET_CURRENT_FRAME();              \
-  uptr pc = AsanStackTrace::GetCurrentPc();   \
-  uptr local_stack;                           \
-  uptr sp = (uptr)&local_stack
-
 // Get the stack trace with the given pc and bp.
 // The pc will be in the position 0 of the resulting stack trace.
 // The bp may refer to the current frame or to the caller's frame.
 // fast_unwind is currently unused.
-#define GET_STACK_TRACE_WITH_PC_AND_BP(max_s, pc, bp)               \
-  AsanStackTrace stack;                                             \
-  stack.GetStackTrace(max_s, pc, bp)
+#define GET_STACK_TRACE_WITH_PC_AND_BP(max_s, pc, bp, fast)     \
+  StackTrace stack;                                             \
+  GetStackTrace(&stack, max_s, pc, bp, fast)
 
 // NOTE: A Rule of thumb is to retrieve stack trace in the interceptors
 // as early as possible (in functions exposed to the user), as we generally
 // don't want stack trace to contain functions from ASan internals.
 
-#define GET_STACK_TRACE_HERE(max_size)                        \
+#define GET_STACK_TRACE(max_size, fast)                       \
   GET_STACK_TRACE_WITH_PC_AND_BP(max_size,                    \
-      AsanStackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
+      StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), fast)
+
+#define GET_STACK_TRACE_FATAL(pc, bp)                                 \
+  GET_STACK_TRACE_WITH_PC_AND_BP(kStackTraceMax, pc, bp,              \
+                                 flags()->fast_unwind_on_fatal)
+
+#define GET_STACK_TRACE_FATAL_HERE                           \
+  GET_STACK_TRACE(kStackTraceMax, flags()->fast_unwind_on_fatal)
+
+#define GET_STACK_TRACE_THREAD                              \
+  GET_STACK_TRACE(kStackTraceMax, true)
 
-#define GET_STACK_TRACE_HERE_FOR_MALLOC                             \
-  GET_STACK_TRACE_HERE(flags()->malloc_context_size)
+#define GET_STACK_TRACE_MALLOC                             \
+  GET_STACK_TRACE(flags()->malloc_context_size,            \
+                  flags()->fast_unwind_on_malloc)
 
-#define GET_STACK_TRACE_HERE_FOR_FREE(ptr)                          \
-  GET_STACK_TRACE_HERE(flags()->malloc_context_size)
+#define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC
 
 #define PRINT_CURRENT_STACK()                    \
   {                                              \
-    GET_STACK_TRACE_HERE(kStackTraceMax);        \
-    stack.PrintStack();                          \
+    GET_STACK_TRACE(kStackTraceMax,              \
+      flags()->fast_unwind_on_fatal);            \
+    PrintStack(&stack);                          \
   }
 
 #endif  // ASAN_STACK_H
diff --git a/lib/asan/asan_stats.cc b/lib/asan/asan_stats.cc
index ef5e53a8bf33..c57c8cc61aed 100644
--- a/lib/asan/asan_stats.cc
+++ b/lib/asan/asan_stats.cc
@@ -12,11 +12,11 @@
 // Code related to statistics collected by AddressSanitizer.
 //===----------------------------------------------------------------------===//
 #include "asan_interceptors.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_stats.h"
 #include "asan_thread_registry.h"
+#include "sanitizer/asan_interface.h"
+#include "sanitizer_common/sanitizer_stackdepot.h"
 
 namespace __asan {
 
@@ -27,39 +27,45 @@ AsanStats::AsanStats() {
 
 static void PrintMallocStatsArray(const char *prefix,
                                   uptr (&array)[kNumberOfSizeClasses]) {
-  AsanPrintf("%s", prefix);
+  Printf("%s", prefix);
   for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
     if (!array[i]) continue;
-    AsanPrintf("%zu:%zu; ", i, array[i]);
+    Printf("%zu:%zu; ", i, array[i]);
   }
-  AsanPrintf("\n");
+  Printf("\n");
 }
 
 void AsanStats::Print() {
-  AsanPrintf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
+  Printf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
              malloced>>20, malloced_redzones>>20, mallocs);
-  AsanPrintf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
-  AsanPrintf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
-  AsanPrintf("Stats: %zuM really freed by %zu calls\n",
+  Printf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
+  Printf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
+  Printf("Stats: %zuM really freed by %zu calls\n",
              really_freed>>20, real_frees);
-  AsanPrintf("Stats: %zuM (%zu full pages) mmaped in %zu calls\n",
-             mmaped>>20, mmaped / kPageSize, mmaps);
+  Printf("Stats: %zuM (%zuM-%zuM) mmaped; %zu maps, %zu unmaps\n",
+             (mmaped-munmaped)>>20, mmaped>>20, munmaped>>20,
+             mmaps, munmaps);
 
   PrintMallocStatsArray("  mmaps   by size class: ", mmaped_by_size);
   PrintMallocStatsArray("  mallocs by size class: ", malloced_by_size);
   PrintMallocStatsArray("  frees   by size class: ", freed_by_size);
   PrintMallocStatsArray("  rfrees  by size class: ", really_freed_by_size);
-  AsanPrintf("Stats: malloc large: %zu small slow: %zu\n",
+  Printf("Stats: malloc large: %zu small slow: %zu\n",
              malloc_large, malloc_small_slow);
 }
 
-static AsanLock print_lock(LINKER_INITIALIZED);
+static BlockingMutex print_lock(LINKER_INITIALIZED);
 
 static void PrintAccumulatedStats() {
-  AsanStats stats = asanThreadRegistry().GetAccumulatedStats();
+  AsanStats stats;
+  asanThreadRegistry().GetAccumulatedStats(&stats);
   // Use lock to keep reports from mixing up.
-  ScopedLock lock(&print_lock);
+  BlockingMutexLock lock(&print_lock);
   stats.Print();
+  StackDepotStats *stack_depot_stats = StackDepotGetStats();
+  Printf("Stats: StackDepot: %zd ids; %zdM mapped\n",
+         stack_depot_stats->n_uniq_ids, stack_depot_stats->mapped >> 20);
+  PrintInternalAllocatorStats();
 }
 
 }  // namespace __asan
diff --git a/lib/asan/asan_stats.h b/lib/asan/asan_stats.h
index b4c63f44fc68..37846bc92ad2 100644
--- a/lib/asan/asan_stats.h
+++ b/lib/asan/asan_stats.h
@@ -37,6 +37,8 @@ struct AsanStats {
   uptr realloced;
   uptr mmaps;
   uptr mmaped;
+  uptr munmaps;
+  uptr munmaped;
   uptr mmaped_by_size[kNumberOfSizeClasses];
   uptr malloced_by_size[kNumberOfSizeClasses];
   uptr freed_by_size[kNumberOfSizeClasses];
@@ -54,6 +56,14 @@ struct AsanStats {
   void Print();
 };
 
+// A cross-platform equivalent of malloc_statistics_t on Mac OS.
+struct AsanMallocStats {
+  uptr blocks_in_use;
+  uptr size_in_use;
+  uptr max_size_in_use;
+  uptr size_allocated;
+};
+
 }  // namespace __asan
 
 #endif  // ASAN_STATS_H
diff --git a/lib/asan/asan_thread.cc b/lib/asan/asan_thread.cc
index 05a41ea9685a..778e91932ed5 100644
--- a/lib/asan/asan_thread.cc
+++ b/lib/asan/asan_thread.cc
@@ -26,24 +26,18 @@ AsanThread::AsanThread(LinkerInitialized x)
       malloc_storage_(x),
       stats_(x) { }
 
-static AsanLock mu_for_thread_summary(LINKER_INITIALIZED);
-static LowLevelAllocator allocator_for_thread_summary(LINKER_INITIALIZED);
-
 AsanThread *AsanThread::Create(u32 parent_tid, thread_callback_t start_routine,
-                               void *arg, AsanStackTrace *stack) {
-  uptr size = RoundUpTo(sizeof(AsanThread), kPageSize);
+                               void *arg, StackTrace *stack) {
+  uptr PageSize = GetPageSizeCached();
+  uptr size = RoundUpTo(sizeof(AsanThread), PageSize);
   AsanThread *thread = (AsanThread*)MmapOrDie(size, __FUNCTION__);
   thread->start_routine_ = start_routine;
   thread->arg_ = arg;
 
-  const uptr kSummaryAllocSize = 1024;
+  const uptr kSummaryAllocSize = PageSize;
   CHECK_LE(sizeof(AsanThreadSummary), kSummaryAllocSize);
-  AsanThreadSummary *summary;
-  {
-    ScopedLock lock(&mu_for_thread_summary);
-    summary = (AsanThreadSummary*)
-        allocator_for_thread_summary.Allocate(kSummaryAllocSize);
-  }
+  AsanThreadSummary *summary =
+      (AsanThreadSummary*)MmapOrDie(PageSize, "AsanThreadSummary");
   summary->Init(parent_tid, stack);
   summary->set_thread(thread);
   thread->set_summary(summary);
@@ -73,14 +67,14 @@ void AsanThread::Destroy() {
   // and we don't want it to have any poisoned stack.
   ClearShadowForThreadStack();
   fake_stack().Cleanup();
-  uptr size = RoundUpTo(sizeof(AsanThread), kPageSize);
+  uptr size = RoundUpTo(sizeof(AsanThread), GetPageSizeCached());
   UnmapOrDie(this, size);
 }
 
 void AsanThread::Init() {
   SetThreadStackTopAndBottom();
   CHECK(AddrIsInMem(stack_bottom_));
-  CHECK(AddrIsInMem(stack_top_));
+  CHECK(AddrIsInMem(stack_top_ - 1));
   ClearShadowForThreadStack();
   if (flags()->verbosity >= 1) {
     int local = 0;
@@ -125,25 +119,25 @@ void AsanThread::ClearShadowForThreadStack() {
 
 const char *AsanThread::GetFrameNameByAddr(uptr addr, uptr *offset) {
   uptr bottom = 0;
-  bool is_fake_stack = false;
   if (AddrIsInStack(addr)) {
     bottom = stack_bottom();
   } else {
     bottom = fake_stack().AddrIsInFakeStack(addr);
     CHECK(bottom);
-    is_fake_stack = true;
+    *offset = addr - bottom;
+    return  (const char *)((uptr*)bottom)[1];
   }
-  uptr aligned_addr = addr & ~(__WORDSIZE/8 - 1);  // align addr.
+  uptr aligned_addr = addr & ~(SANITIZER_WORDSIZE/8 - 1);  // align addr.
   u8 *shadow_ptr = (u8*)MemToShadow(aligned_addr);
   u8 *shadow_bottom = (u8*)MemToShadow(bottom);
 
   while (shadow_ptr >= shadow_bottom &&
-      *shadow_ptr != kAsanStackLeftRedzoneMagic) {
+         *shadow_ptr != kAsanStackLeftRedzoneMagic) {
     shadow_ptr--;
   }
 
   while (shadow_ptr >= shadow_bottom &&
-      *shadow_ptr == kAsanStackLeftRedzoneMagic) {
+         *shadow_ptr == kAsanStackLeftRedzoneMagic) {
     shadow_ptr--;
   }
 
@@ -153,8 +147,7 @@ const char *AsanThread::GetFrameNameByAddr(uptr addr, uptr *offset) {
   }
 
   uptr* ptr = (uptr*)SHADOW_TO_MEM((uptr)(shadow_ptr + 1));
-  CHECK((ptr[0] == kCurrentStackFrameMagic) ||
-      (is_fake_stack && ptr[0] == kRetiredStackFrameMagic));
+  CHECK(ptr[0] == kCurrentStackFrameMagic);
   *offset = addr - (uptr)ptr;
   return (const char*)ptr[1];
 }
diff --git a/lib/asan/asan_thread.h b/lib/asan/asan_thread.h
index 9a032fe3e66c..acc27e52e224 100644
--- a/lib/asan/asan_thread.h
+++ b/lib/asan/asan_thread.h
@@ -31,7 +31,7 @@ class AsanThread;
 class AsanThreadSummary {
  public:
   explicit AsanThreadSummary(LinkerInitialized) { }  // for T0.
-  void Init(u32 parent_tid, AsanStackTrace *stack) {
+  void Init(u32 parent_tid, StackTrace *stack) {
     parent_tid_ = parent_tid;
     announced_ = false;
     tid_ = kInvalidTid;
@@ -39,35 +39,40 @@ class AsanThreadSummary {
       internal_memcpy(&stack_, stack, sizeof(*stack));
     }
     thread_ = 0;
-  }
-  void Announce() {
-    if (tid_ == 0) return;  // no need to announce the main thread.
-    if (!announced_) {
-      announced_ = true;
-      AsanPrintf("Thread T%d created by T%d here:\n", tid_, parent_tid_);
-      stack_.PrintStack();
-    }
+    name_[0] = 0;
   }
   u32 tid() { return tid_; }
   void set_tid(u32 tid) { tid_ = tid; }
+  u32 parent_tid() { return parent_tid_; }
+  bool announced() { return announced_; }
+  void set_announced(bool announced) { announced_ = announced; }
+  StackTrace *stack() { return &stack_; }
   AsanThread *thread() { return thread_; }
   void set_thread(AsanThread *thread) { thread_ = thread; }
   static void TSDDtor(void *tsd);
+  void set_name(const char *name) {
+    internal_strncpy(name_, name, sizeof(name_) - 1);
+  }
+  const char *name() { return name_; }
 
  private:
   u32 tid_;
   u32 parent_tid_;
   bool announced_;
-  AsanStackTrace stack_;
+  StackTrace stack_;
   AsanThread *thread_;
+  char name_[128];
 };
 
+// AsanThreadSummary objects are never freed, so we need many of them.
+COMPILER_CHECK(sizeof(AsanThreadSummary) <= 4094);
+
 // AsanThread are stored in TSD and destroyed when the thread dies.
 class AsanThread {
  public:
   explicit AsanThread(LinkerInitialized);  // for T0.
   static AsanThread *Create(u32 parent_tid, thread_callback_t start_routine,
-                            void *arg, AsanStackTrace *stack);
+                            void *arg, StackTrace *stack);
   void Destroy();
 
   void Init();  // Should be called from the thread itself.
@@ -91,7 +96,6 @@ class AsanThread {
   AsanStats &stats() { return stats_; }
 
  private:
-
   void SetThreadStackTopAndBottom();
   void ClearShadowForThreadStack();
   AsanThreadSummary *summary_;
diff --git a/lib/asan/asan_thread_registry.cc b/lib/asan/asan_thread_registry.cc
index 4540d589c552..80675405fbd5 100644
--- a/lib/asan/asan_thread_registry.cc
+++ b/lib/asan/asan_thread_registry.cc
@@ -20,7 +20,7 @@
 
 namespace __asan {
 
-static AsanThreadRegistry asan_thread_registry(__asan::LINKER_INITIALIZED);
+static AsanThreadRegistry asan_thread_registry(LINKER_INITIALIZED);
 
 AsanThreadRegistry &asanThreadRegistry() {
   return asan_thread_registry;
@@ -30,6 +30,7 @@ AsanThreadRegistry::AsanThreadRegistry(LinkerInitialized x)
     : main_thread_(x),
       main_thread_summary_(x),
       accumulated_stats_(x),
+      max_malloced_memory_(x),
       mu_(x) { }
 
 void AsanThreadRegistry::Init() {
@@ -43,7 +44,7 @@ void AsanThreadRegistry::Init() {
 }
 
 void AsanThreadRegistry::RegisterThread(AsanThread *thread) {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   u32 tid = n_threads_;
   n_threads_++;
   CHECK(n_threads_ < kMaxNumberOfThreads);
@@ -55,7 +56,7 @@ void AsanThreadRegistry::RegisterThread(AsanThread *thread) {
 }
 
 void AsanThreadRegistry::UnregisterThread(AsanThread *thread) {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   FlushToAccumulatedStatsUnlocked(&thread->stats());
   AsanThreadSummary *summary = thread->summary();
   CHECK(summary);
@@ -69,7 +70,7 @@ AsanThread *AsanThreadRegistry::GetMain() {
 AsanThread *AsanThreadRegistry::GetCurrent() {
   AsanThreadSummary *summary = (AsanThreadSummary *)AsanTSDGet();
   if (!summary) {
-#ifdef ANDROID
+#if ASAN_ANDROID
     // On Android, libc constructor is called _after_ asan_init, and cleans up
     // TSD. Try to figure out if this is still the main thread by the stack
     // address. We are not entirely sure that we have correct main thread
@@ -103,32 +104,51 @@ AsanStats &AsanThreadRegistry::GetCurrentThreadStats() {
   return (t) ? t->stats() : main_thread_.stats();
 }
 
-AsanStats AsanThreadRegistry::GetAccumulatedStats() {
-  ScopedLock lock(&mu_);
+void AsanThreadRegistry::GetAccumulatedStats(AsanStats *stats) {
+  BlockingMutexLock lock(&mu_);
   UpdateAccumulatedStatsUnlocked();
-  return accumulated_stats_;
+  internal_memcpy(stats, &accumulated_stats_, sizeof(accumulated_stats_));
 }
 
 uptr AsanThreadRegistry::GetCurrentAllocatedBytes() {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   UpdateAccumulatedStatsUnlocked();
-  return accumulated_stats_.malloced - accumulated_stats_.freed;
+  uptr malloced = accumulated_stats_.malloced;
+  uptr freed = accumulated_stats_.freed;
+  // Return sane value if malloced < freed due to racy
+  // way we update accumulated stats.
+  return (malloced > freed) ? malloced - freed : 1;
 }
 
 uptr AsanThreadRegistry::GetHeapSize() {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   UpdateAccumulatedStatsUnlocked();
-  return accumulated_stats_.mmaped;
+  return accumulated_stats_.mmaped - accumulated_stats_.munmaped;
 }
 
 uptr AsanThreadRegistry::GetFreeBytes() {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   UpdateAccumulatedStatsUnlocked();
-  return accumulated_stats_.mmaped
-         - accumulated_stats_.malloced
-         - accumulated_stats_.malloced_redzones
-         + accumulated_stats_.really_freed
-         + accumulated_stats_.really_freed_redzones;
+  uptr total_free = accumulated_stats_.mmaped
+                  - accumulated_stats_.munmaped
+                  + accumulated_stats_.really_freed
+                  + accumulated_stats_.really_freed_redzones;
+  uptr total_used = accumulated_stats_.malloced
+                  + accumulated_stats_.malloced_redzones;
+  // Return sane value if total_free < total_used due to racy
+  // way we update accumulated stats.
+  return (total_free > total_used) ? total_free - total_used : 1;
+}
+
+// Return several stats counters with a single call to
+// UpdateAccumulatedStatsUnlocked().
+void AsanThreadRegistry::FillMallocStatistics(AsanMallocStats *malloc_stats) {
+  BlockingMutexLock lock(&mu_);
+  UpdateAccumulatedStatsUnlocked();
+  malloc_stats->blocks_in_use = accumulated_stats_.mallocs;
+  malloc_stats->size_in_use = accumulated_stats_.malloced;
+  malloc_stats->max_size_in_use = max_malloced_memory_;
+  malloc_stats->size_allocated = accumulated_stats_.mmaped;
 }
 
 AsanThreadSummary *AsanThreadRegistry::FindByTid(u32 tid) {
@@ -138,7 +158,7 @@ AsanThreadSummary *AsanThreadRegistry::FindByTid(u32 tid) {
 }
 
 AsanThread *AsanThreadRegistry::FindThreadByStackAddress(uptr addr) {
-  ScopedLock lock(&mu_);
+  BlockingMutexLock lock(&mu_);
   for (u32 tid = 0; tid < n_threads_; tid++) {
     AsanThread *t = thread_summaries_[tid]->thread();
     if (!t || !(t->fake_stack().StackSize())) continue;
@@ -156,6 +176,12 @@ void AsanThreadRegistry::UpdateAccumulatedStatsUnlocked() {
       FlushToAccumulatedStatsUnlocked(&t->stats());
     }
   }
+  // This is not very accurate: we may miss allocation peaks that happen
+  // between two updates of accumulated_stats_. For more accurate bookkeeping
+  // the maximum should be updated on every malloc(), which is unacceptable.
+  if (max_malloced_memory_ < accumulated_stats_.malloced) {
+    max_malloced_memory_ = accumulated_stats_.malloced;
+  }
 }
 
 void AsanThreadRegistry::FlushToAccumulatedStatsUnlocked(AsanStats *stats) {
diff --git a/lib/asan/asan_thread_registry.h b/lib/asan/asan_thread_registry.h
index 7037b9edc161..adb1a6d4f32d 100644
--- a/lib/asan/asan_thread_registry.h
+++ b/lib/asan/asan_thread_registry.h
@@ -15,10 +15,10 @@
 #ifndef ASAN_THREAD_REGISTRY_H
 #define ASAN_THREAD_REGISTRY_H
 
-#include "asan_lock.h"
 #include "asan_stack.h"
 #include "asan_stats.h"
 #include "asan_thread.h"
+#include "sanitizer_common/sanitizer_mutex.h"
 
 namespace __asan {
 
@@ -47,12 +47,13 @@ class AsanThreadRegistry {
   // Returns stats for GetCurrent(), or stats for
   // T0 if GetCurrent() returns 0.
   AsanStats &GetCurrentThreadStats();
-  // Flushes all thread-local stats to accumulated stats, and returns
+  // Flushes all thread-local stats to accumulated stats, and makes
   // a copy of accumulated stats.
-  AsanStats GetAccumulatedStats();
+  void GetAccumulatedStats(AsanStats *stats);
   uptr GetCurrentAllocatedBytes();
   uptr GetHeapSize();
   uptr GetFreeBytes();
+  void FillMallocStatistics(AsanMallocStats *malloc_stats);
 
   AsanThreadSummary *FindByTid(u32 tid);
   AsanThread *FindThreadByStackAddress(uptr addr);
@@ -68,8 +69,11 @@ class AsanThreadRegistry {
   AsanThread main_thread_;
   AsanThreadSummary main_thread_summary_;
   AsanStats accumulated_stats_;
+  // Required for malloc_zone_statistics() on OS X. This can't be stored in
+  // per-thread AsanStats.
+  uptr max_malloced_memory_;
   u32 n_threads_;
-  AsanLock mu_;
+  BlockingMutex mu_;
   bool inited_;
 };
 
diff --git a/lib/asan/asan_win.cc b/lib/asan/asan_win.cc
index 9e899d5865fa..d8ce050641bc 100644
--- a/lib/asan/asan_win.cc
+++ b/lib/asan/asan_win.cc
@@ -17,30 +17,29 @@
 #include <dbghelp.h>
 #include <stdlib.h>
 
-#include <new>  // FIXME: temporarily needed for placement new in AsanLock.
-
 #include "asan_interceptors.h"
 #include "asan_internal.h"
-#include "asan_lock.h"
 #include "asan_thread.h"
 #include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_mutex.h"
 
 namespace __asan {
 
 // ---------------------- Stacktraces, symbols, etc. ---------------- {{{1
-static AsanLock dbghelp_lock(LINKER_INITIALIZED);
+static BlockingMutex dbghelp_lock(LINKER_INITIALIZED);
 static bool dbghelp_initialized = false;
 #pragma comment(lib, "dbghelp.lib")
 
-void AsanStackTrace::GetStackTrace(uptr max_s, uptr pc, uptr bp) {
-  max_size = max_s;
+void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp, bool fast) {
+  (void)fast;
+  stack->max_size = max_s;
   void *tmp[kStackTraceMax];
 
   // FIXME: CaptureStackBackTrace might be too slow for us.
   // FIXME: Compare with StackWalk64.
   // FIXME: Look at LLVMUnhandledExceptionFilter in Signals.inc
-  uptr cs_ret = CaptureStackBackTrace(1, max_size, tmp, 0),
-         offset = 0;
+  uptr cs_ret = CaptureStackBackTrace(1, stack->max_size, tmp, 0);
+  uptr offset = 0;
   // Skip the RTL frames by searching for the PC in the stacktrace.
   // FIXME: this doesn't work well for the malloc/free stacks yet.
   for (uptr i = 0; i < cs_ret; i++) {
@@ -50,86 +49,9 @@ void AsanStackTrace::GetStackTrace(uptr max_s, uptr pc, uptr bp) {
     break;
   }
 
-  size = cs_ret - offset;
-  for (uptr i = 0; i < size; i++)
-    trace[i] = (uptr)tmp[i + offset];
-}
-
-bool __asan_WinSymbolize(const void *addr, char *out_buffer, int buffer_size) {
-  ScopedLock lock(&dbghelp_lock);
-  if (!dbghelp_initialized) {
-    SymSetOptions(SYMOPT_DEFERRED_LOADS |
-                  SYMOPT_UNDNAME |
-                  SYMOPT_LOAD_LINES);
-    CHECK(SymInitialize(GetCurrentProcess(), 0, TRUE));
-    // FIXME: We don't call SymCleanup() on exit yet - should we?
-    dbghelp_initialized = true;
-  }
-
-  // See http://msdn.microsoft.com/en-us/library/ms680578(VS.85).aspx
-  char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(CHAR)];
-  PSYMBOL_INFO symbol = (PSYMBOL_INFO)buffer;
-  symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
-  symbol->MaxNameLen = MAX_SYM_NAME;
-  DWORD64 offset = 0;
-  BOOL got_objname = SymFromAddr(GetCurrentProcess(),
-                                 (DWORD64)addr, &offset, symbol);
-  if (!got_objname)
-    return false;
-
-  DWORD  unused;
-  IMAGEHLP_LINE64 info;
-  info.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
-  BOOL got_fileline = SymGetLineFromAddr64(GetCurrentProcess(),
-                                           (DWORD64)addr, &unused, &info);
-  int written = 0;
-  out_buffer[0] = '\0';
-  // FIXME: it might be useful to print out 'obj' or 'obj+offset' info too.
-  if (got_fileline) {
-    written += internal_snprintf(out_buffer + written, buffer_size - written,
-                        " %s %s:%d", symbol->Name,
-                        info.FileName, info.LineNumber);
-  } else {
-    written += internal_snprintf(out_buffer + written, buffer_size - written,
-                        " %s+0x%p", symbol->Name, offset);
-  }
-  return true;
-}
-
-// ---------------------- AsanLock ---------------- {{{1
-enum LockState {
-  LOCK_UNINITIALIZED = 0,
-  LOCK_READY = -1,
-};
-
-AsanLock::AsanLock(LinkerInitialized li) {
-  // FIXME: see comments in AsanLock::Lock() for the details.
-  CHECK(li == LINKER_INITIALIZED || owner_ == LOCK_UNINITIALIZED);
-
-  CHECK(sizeof(CRITICAL_SECTION) <= sizeof(opaque_storage_));
-  InitializeCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
-  owner_ = LOCK_READY;
-}
-
-void AsanLock::Lock() {
-  if (owner_ == LOCK_UNINITIALIZED) {
-    // FIXME: hm, global AsanLock objects are not initialized?!?
-    // This might be a side effect of the clang+cl+link Frankenbuild...
-    new(this) AsanLock((LinkerInitialized)(LINKER_INITIALIZED + 1));
-
-    // FIXME: If it turns out the linker doesn't invoke our
-    // constructors, we should probably manually Lock/Unlock all the global
-    // locks while we're starting in one thread to avoid double-init races.
-  }
-  EnterCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
-  CHECK(owner_ == LOCK_READY);
-  owner_ = GetThreadSelf();
-}
-
-void AsanLock::Unlock() {
-  CHECK(owner_ == GetThreadSelf());
-  owner_ = LOCK_READY;
-  LeaveCriticalSection((LPCRITICAL_SECTION)opaque_storage_);
+  stack->size = cs_ret - offset;
+  for (uptr i = 0; i < stack->size; i++)
+    stack->trace[i] = (uptr)tmp[i + offset];
 }
 
 // ---------------------- TSD ---------------- {{{1
@@ -153,6 +75,10 @@ void AsanTSDSet(void *tsd) {
 }
 
 // ---------------------- Various stuff ---------------- {{{1
+void MaybeReexec() {
+  // No need to re-exec on Windows.
+}
+
 void *AsanDoesNotSupportStaticLinkage() {
 #if defined(_DEBUG)
 #error Please build the runtime with a non-debug CRT: /MD or /MT
@@ -176,6 +102,58 @@ void AsanPlatformThreadInit() {
   // Nothing here for now.
 }
 
+void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
+  UNIMPLEMENTED();
+}
+
 }  // namespace __asan
 
+// ---------------------- Interface ---------------- {{{1
+using namespace __asan;  // NOLINT
+
+extern "C" {
+SANITIZER_INTERFACE_ATTRIBUTE NOINLINE
+bool __asan_symbolize(const void *addr, char *out_buffer, int buffer_size) {
+  BlockingMutexLock lock(&dbghelp_lock);
+  if (!dbghelp_initialized) {
+    SymSetOptions(SYMOPT_DEFERRED_LOADS |
+                  SYMOPT_UNDNAME |
+                  SYMOPT_LOAD_LINES);
+    CHECK(SymInitialize(GetCurrentProcess(), 0, TRUE));
+    // FIXME: We don't call SymCleanup() on exit yet - should we?
+    dbghelp_initialized = true;
+  }
+
+  // See http://msdn.microsoft.com/en-us/library/ms680578(VS.85).aspx
+  char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(CHAR)];
+  PSYMBOL_INFO symbol = (PSYMBOL_INFO)buffer;
+  symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
+  symbol->MaxNameLen = MAX_SYM_NAME;
+  DWORD64 offset = 0;
+  BOOL got_objname = SymFromAddr(GetCurrentProcess(),
+                                 (DWORD64)addr, &offset, symbol);
+  if (!got_objname)
+    return false;
+
+  DWORD  unused;
+  IMAGEHLP_LINE64 info;
+  info.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
+  BOOL got_fileline = SymGetLineFromAddr64(GetCurrentProcess(),
+                                           (DWORD64)addr, &unused, &info);
+  int written = 0;
+  out_buffer[0] = '\0';
+  // FIXME: it might be useful to print out 'obj' or 'obj+offset' info too.
+  if (got_fileline) {
+    written += internal_snprintf(out_buffer + written, buffer_size - written,
+                        " %s %s:%d", symbol->Name,
+                        info.FileName, info.LineNumber);
+  } else {
+    written += internal_snprintf(out_buffer + written, buffer_size - written,
+                        " %s+0x%p", symbol->Name, offset);
+  }
+  return true;
+}
+}  // extern "C"
+
+
 #endif  // _WIN32
diff --git a/lib/asan/dynamic/Makefile.mk b/lib/asan/dynamic/Makefile.mk
new file mode 100644
index 000000000000..897844e7eed4
--- /dev/null
+++ b/lib/asan/dynamic/Makefile.mk
@@ -0,0 +1,25 @@
+#===- lib/asan/dynamic/Makefile.mk -------------------------*- Makefile -*--===#
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+
+ModuleName := asan_dynamic
+SubDirs :=
+
+Sources := $(foreach file,$(wildcard $(Dir)/*.cc),$(notdir $(file)))
+ObjNames := $(Sources:%.cc=%.o)
+
+Implementation := Generic
+
+# FIXME: use automatic dependencies?
+Dependencies := $(wildcard $(Dir)/*.h)
+Dependencies += $(wildcard $(Dir)/../../interception/*.h)
+Dependencies += $(wildcard $(Dir)/../../interception/mach_override/*.h)
+Dependencies += $(wildcard $(Dir)/../../sanitizer_common/*.h)
+
+# Define a convenience variable for the asan dynamic functions.
+AsanDynamicFunctions := $(Sources:%.cc=%)
diff --git a/lib/asan/dynamic/asan_interceptors_dynamic.cc b/lib/asan/dynamic/asan_interceptors_dynamic.cc
new file mode 100644
index 000000000000..4f0f7bd2d5f8
--- /dev/null
+++ b/lib/asan/dynamic/asan_interceptors_dynamic.cc
@@ -0,0 +1,111 @@
+//===-- asan_interceptors_dynamic.cc --------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// __DATA,__interpose section of the dynamic runtime library for Mac OS.
+//===----------------------------------------------------------------------===//
+
+#if defined(__APPLE__)
+
+#include "../asan_interceptors.h"
+#include "../asan_intercepted_functions.h"
+
+namespace __asan {
+
+#if !MAC_INTERPOSE_FUNCTIONS
+# error \
+  Dynamic interposing library should be built with -DMAC_INTERPOSE_FUNCTIONS
+#endif
+
+#define INTERPOSE_FUNCTION(function) \
+    { reinterpret_cast<const uptr>(WRAP(function)), \
+      reinterpret_cast<const uptr>(function) }
+
+#define INTERPOSE_FUNCTION_2(function, wrapper) \
+    { reinterpret_cast<const uptr>(wrapper), \
+      reinterpret_cast<const uptr>(function) }
+
+struct interpose_substitution {
+  const uptr replacement;
+  const uptr original;
+};
+
+__attribute__((used))
+const interpose_substitution substitutions[]
+    __attribute__((section("__DATA, __interpose"))) = {
+  INTERPOSE_FUNCTION(strlen),
+  INTERPOSE_FUNCTION(memcmp),
+  INTERPOSE_FUNCTION(memcpy),
+  INTERPOSE_FUNCTION(memmove),
+  INTERPOSE_FUNCTION(memset),
+  INTERPOSE_FUNCTION(strchr),
+  INTERPOSE_FUNCTION(strcat),
+  INTERPOSE_FUNCTION(strncat),
+  INTERPOSE_FUNCTION(strcpy),
+  INTERPOSE_FUNCTION(strncpy),
+  INTERPOSE_FUNCTION(pthread_create),
+  INTERPOSE_FUNCTION(longjmp),
+#if ASAN_INTERCEPT__LONGJMP
+  INTERPOSE_FUNCTION(_longjmp),
+#endif
+#if ASAN_INTERCEPT_SIGLONGJMP
+  INTERPOSE_FUNCTION(siglongjmp),
+#endif
+#if ASAN_INTERCEPT_STRDUP
+  INTERPOSE_FUNCTION(strdup),
+#endif
+#if ASAN_INTERCEPT_STRNLEN
+  INTERPOSE_FUNCTION(strnlen),
+#endif
+#if ASAN_INTERCEPT_INDEX
+  INTERPOSE_FUNCTION_2(index, WRAP(strchr)),
+#endif
+  INTERPOSE_FUNCTION(strcmp),
+  INTERPOSE_FUNCTION(strncmp),
+#if ASAN_INTERCEPT_STRCASECMP_AND_STRNCASECMP
+  INTERPOSE_FUNCTION(strcasecmp),
+  INTERPOSE_FUNCTION(strncasecmp),
+#endif
+  INTERPOSE_FUNCTION(atoi),
+  INTERPOSE_FUNCTION(atol),
+  INTERPOSE_FUNCTION(strtol),
+#if ASAN_INTERCEPT_ATOLL_AND_STRTOLL
+  INTERPOSE_FUNCTION(atoll),
+  INTERPOSE_FUNCTION(strtoll),
+#endif
+#if ASAN_INTERCEPT_MLOCKX
+  INTERPOSE_FUNCTION(mlock),
+  INTERPOSE_FUNCTION(munlock),
+  INTERPOSE_FUNCTION(mlockall),
+  INTERPOSE_FUNCTION(munlockall),
+#endif
+  INTERPOSE_FUNCTION(dispatch_async_f),
+  INTERPOSE_FUNCTION(dispatch_sync_f),
+  INTERPOSE_FUNCTION(dispatch_after_f),
+  INTERPOSE_FUNCTION(dispatch_barrier_async_f),
+  INTERPOSE_FUNCTION(dispatch_group_async_f),
+#ifndef MISSING_BLOCKS_SUPPORT
+  INTERPOSE_FUNCTION(dispatch_group_async),
+  INTERPOSE_FUNCTION(dispatch_async),
+  INTERPOSE_FUNCTION(dispatch_after),
+  INTERPOSE_FUNCTION(dispatch_source_set_event_handler),
+  INTERPOSE_FUNCTION(dispatch_source_set_cancel_handler),
+#endif
+  INTERPOSE_FUNCTION(signal),
+  INTERPOSE_FUNCTION(sigaction),
+
+  INTERPOSE_FUNCTION(__CFInitialize),
+  INTERPOSE_FUNCTION(CFStringCreateCopy),
+  INTERPOSE_FUNCTION(free),
+};
+
+}  // namespace __asan
+
+#endif  // __APPLE__
diff --git a/lib/asan/lit_tests/CMakeLists.txt b/lib/asan/lit_tests/CMakeLists.txt
new file mode 100644
index 000000000000..1609032d4670
--- /dev/null
+++ b/lib/asan/lit_tests/CMakeLists.txt
@@ -0,0 +1,32 @@
+set(ASAN_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/..)
+set(ASAN_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/..)
+
+configure_lit_site_cfg(
+  ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
+  ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
+  )
+
+configure_lit_site_cfg(
+  ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
+  ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg
+  )
+
+if(COMPILER_RT_CAN_EXECUTE_TESTS)
+  # Run ASan tests only if we're sure we may produce working binaries.
+  set(ASAN_TEST_DEPS
+    clang clang-headers FileCheck count not llvm-nm llvm-symbolizer
+    ${ASAN_RUNTIME_LIBRARIES}
+    )
+  set(ASAN_TEST_PARAMS
+    asan_site_config=${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
+    )
+  if(LLVM_INCLUDE_TESTS)
+    list(APPEND ASAN_TEST_DEPS AsanUnitTests)
+  endif()
+  add_lit_testsuite(check-asan "Running the AddressSanitizer tests"
+    ${CMAKE_CURRENT_BINARY_DIR}
+    PARAMS ${ASAN_TEST_PARAMS}
+    DEPENDS ${ASAN_TEST_DEPS}
+    )
+  set_target_properties(check-asan PROPERTIES FOLDER "ASan tests")
+endif()
diff --git a/lib/asan/lit_tests/Helpers/blacklist-extra.cc b/lib/asan/lit_tests/Helpers/blacklist-extra.cc
new file mode 100644
index 000000000000..627115cdda2b
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/blacklist-extra.cc
@@ -0,0 +1,5 @@
+// This function is broken, but this file is blacklisted
+int externalBrokenFunction(int argc) {
+  char x[10] = {0};
+  return x[argc * 10];  // BOOM
+}
diff --git a/lib/asan/lit_tests/Helpers/initialization-blacklist-extra.cc b/lib/asan/lit_tests/Helpers/initialization-blacklist-extra.cc
new file mode 100644
index 000000000000..09aed2112d5e
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/initialization-blacklist-extra.cc
@@ -0,0 +1,15 @@
+int zero_init() { return 0; }
+int badGlobal = zero_init();
+int readBadGlobal() { return badGlobal; }
+
+namespace badNamespace {
+class BadClass {
+ public:
+  BadClass() { value = 0; }
+  int value;
+};
+// Global object with non-trivial constructor.
+BadClass bad_object;
+}  // namespace badNamespace
+
+int accessBadObject() { return badNamespace::bad_object.value; }
diff --git a/lib/asan/lit_tests/Helpers/initialization-blacklist.txt b/lib/asan/lit_tests/Helpers/initialization-blacklist.txt
new file mode 100644
index 000000000000..c5f6610937f0
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/initialization-blacklist.txt
@@ -0,0 +1,2 @@
+global-init:*badGlobal*
+global-init-type:*badNamespace::BadClass*
diff --git a/lib/asan/lit_tests/Helpers/initialization-bug-extra.cc b/lib/asan/lit_tests/Helpers/initialization-bug-extra.cc
new file mode 100644
index 000000000000..3c4cb411defa
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/initialization-bug-extra.cc
@@ -0,0 +1,5 @@
+// This file simply declares a dynamically initialized var by the name of 'y'.
+int initY() {
+  return 5;
+}
+int y = initY();
diff --git a/lib/asan/lit_tests/Helpers/initialization-bug-extra2.cc b/lib/asan/lit_tests/Helpers/initialization-bug-extra2.cc
new file mode 100644
index 000000000000..a3d8f190e58b
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/initialization-bug-extra2.cc
@@ -0,0 +1,6 @@
+// 'z' is dynamically initialized global from different TU.
+extern int z;
+int __attribute__((noinline)) initY() {
+  return z + 1;
+}
+int y = initY();
diff --git a/lib/asan/lit_tests/Helpers/initialization-nobug-extra.cc b/lib/asan/lit_tests/Helpers/initialization-nobug-extra.cc
new file mode 100644
index 000000000000..490b3339054a
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/initialization-nobug-extra.cc
@@ -0,0 +1,9 @@
+// Linker initialized:
+int getAB();
+static int ab = getAB();
+// Function local statics:
+int countCalls();
+static int one = countCalls();
+// Constexpr:
+int getCoolestInteger();
+static int coolest_integer = getCoolestInteger();
diff --git a/lib/asan/lit_tests/Helpers/lit.local.cfg b/lib/asan/lit_tests/Helpers/lit.local.cfg
new file mode 100644
index 000000000000..2fc4d99456b0
--- /dev/null
+++ b/lib/asan/lit_tests/Helpers/lit.local.cfg
@@ -0,0 +1,3 @@
+# Sources in this directory are helper files for tests which test functionality
+# involving multiple translation units.
+config.suffixes = []
diff --git a/lib/asan/lit_tests/Linux/clone_test.cc b/lib/asan/lit_tests/Linux/clone_test.cc
new file mode 100644
index 000000000000..ca13b22425f2
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/clone_test.cc
@@ -0,0 +1,48 @@
+// Regression test for:
+// http://code.google.com/p/address-sanitizer/issues/detail?id=37
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t | FileCheck %s
+
+#include <stdio.h>
+#include <sched.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int Child(void *arg) {
+  char x[32] = {0};  // Stack gets poisoned.
+  printf("Child:  %p\n", x);
+  _exit(1);  // NoReturn, stack will remain unpoisoned unless we do something.
+}
+
+int main(int argc, char **argv) {
+  const int kStackSize = 1 << 20;
+  char child_stack[kStackSize + 1];
+  char *sp = child_stack + kStackSize;  // Stack grows down.
+  printf("Parent: %p\n", sp);
+  pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);
+  int status;
+  pid_t wait_result = waitpid(clone_pid, &status, __WCLONE);
+  if (wait_result < 0) {
+    perror("waitpid");
+    return 0;
+  }
+  if (wait_result == clone_pid && WIFEXITED(status)) {
+    // Make sure the child stack was indeed unpoisoned.
+    for (int i = 0; i < kStackSize; i++)
+      child_stack[i] = i;
+    int ret = child_stack[argc - 1];
+    printf("PASSED\n");
+    // CHECK: PASSED
+    return ret;
+  }
+  return 0;
+}
diff --git a/lib/asan/lit_tests/Linux/initialization-bug-any-order.cc b/lib/asan/lit_tests/Linux/initialization-bug-any-order.cc
new file mode 100644
index 000000000000..645fe1c85ed4
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/initialization-bug-any-order.cc
@@ -0,0 +1,37 @@
+// Test to make sure basic initialization order errors are caught.
+// Check that on Linux initialization order bugs are caught
+// independently on order in which we list source files.
+
+// RUN: %clangxx_asan -m64 -O0 %s %p/../Helpers/initialization-bug-extra.cc\
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1 \
+// RUN:    | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O0 %p/../Helpers/initialization-bug-extra.cc %s\
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1 \
+// RUN:    | %symbolize | FileCheck %s
+
+// Do not test with optimization -- the error may be optimized away.
+
+#include <cstdio>
+
+// 'y' is a dynamically initialized global residing in a different TU.  This
+// dynamic initializer will read the value of 'y' before main starts.  The
+// result is undefined behavior, which should be caught by initialization order
+// checking.
+extern int y;
+int __attribute__((noinline)) initX() {
+  return y + 1;
+  // CHECK: {{AddressSanitizer: initialization-order-fiasco}}
+  // CHECK: {{READ of size .* at 0x.* thread T0}}
+  // CHECK: {{#0 0x.* in .*initX.* .*initialization-bug-any-order.cc:}}[[@LINE-3]]
+  // CHECK: {{0x.* is located 0 bytes inside of global variable .*y.*}}
+}
+
+// This initializer begins our initialization order problems.
+static int x = initX();
+
+int main() {
+  // ASan should have caused an exit before main runs.
+  printf("PASS\n");
+  // CHECK-NOT: PASS
+  return 0;
+}
diff --git a/lib/asan/lit_tests/Linux/interception_failure_test.cc b/lib/asan/lit_tests/Linux/interception_failure_test.cc
new file mode 100644
index 000000000000..dfad909f528c
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/interception_failure_test.cc
@@ -0,0 +1,26 @@
+// If user provides his own libc functions, ASan doesn't
+// intercept these functions.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <stdio.h>
+
+extern "C" long strtol(const char *nptr, char **endptr, int base) {
+  fprintf(stderr, "my_strtol_interceptor\n");
+  return 0;
+}
+
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return (int)strtol(x, 0, 10);
+  // CHECK: my_strtol_interceptor
+  // CHECK-NOT: heap-use-after-free
+}
diff --git a/lib/asan/lit_tests/Linux/interception_malloc_test.cc b/lib/asan/lit_tests/Linux/interception_malloc_test.cc
new file mode 100644
index 000000000000..8f66788e9a82
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/interception_malloc_test.cc
@@ -0,0 +1,27 @@
+// ASan interceptor can be accessed with __interceptor_ prefix.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+extern "C" void *__interceptor_malloc(size_t size);
+extern "C" void *malloc(size_t size) {
+  write(2, "malloc call\n", sizeof("malloc call\n") - 1);
+  return __interceptor_malloc(size);
+}
+
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return (int)strtol(x, 0, 10);
+  // CHECK: malloc call
+  // CHECK: heap-use-after-free
+}
diff --git a/lib/asan/lit_tests/Linux/interception_test.cc b/lib/asan/lit_tests/Linux/interception_test.cc
new file mode 100644
index 000000000000..94fb499f2f87
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/interception_test.cc
@@ -0,0 +1,26 @@
+// ASan interceptor can be accessed with __interceptor_ prefix.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <stdio.h>
+
+extern "C" long __interceptor_strtol(const char *nptr, char **endptr, int base);
+extern "C" long strtol(const char *nptr, char **endptr, int base) {
+  fprintf(stderr, "my_strtol_interceptor\n");
+  return __interceptor_strtol(nptr, endptr, base);
+}
+
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return (int)strtol(x, 0, 10);
+  // CHECK: my_strtol_interceptor
+  // CHECK: heap-use-after-free
+}
diff --git a/lib/asan/lit_tests/Linux/lit.local.cfg b/lib/asan/lit_tests/Linux/lit.local.cfg
new file mode 100644
index 000000000000..57271b8078a4
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/lit.local.cfg
@@ -0,0 +1,9 @@
+def getRoot(config):
+  if not config.parent:
+    return config
+  return getRoot(config.parent)
+
+root = getRoot(config)
+
+if root.host_os not in ['Linux']:
+  config.unsupported = True
diff --git a/lib/asan/lit_tests/Linux/malloc-in-qsort.cc b/lib/asan/lit_tests/Linux/malloc-in-qsort.cc
new file mode 100644
index 000000000000..a3fa255b186d
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/malloc-in-qsort.cc
@@ -0,0 +1,50 @@
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=1 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-FAST
+// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=0 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-SLOW
+
+// Test how well we unwind in presence of qsort in the stack
+// (i.e. if we can unwind through a function compiled w/o frame pointers).
+// https://code.google.com/p/address-sanitizer/issues/detail?id=137
+#include <stdlib.h>
+#include <stdio.h>
+
+int *GlobalPtr;
+
+extern "C" {
+int QsortCallback(const void *a, const void *b) {
+  char *x = (char*)a;
+  char *y = (char*)b;
+  printf("Calling QsortCallback\n");
+  GlobalPtr = new int[10];
+  return (int)*x - (int)*y;
+}
+
+__attribute__((noinline))
+void MyQsort(char *a, size_t size) {
+  printf("Calling qsort\n");
+  qsort(a, size, sizeof(char), QsortCallback);
+  printf("Done\n");  // Avoid tail call.
+}
+}  // extern "C"
+
+int main() {
+  char a[2] = {1, 2};
+  MyQsort(a, 2);
+  return GlobalPtr[10];
+}
+
+// Fast unwind: can not unwind through qsort.
+// FIXME: this test does not properly work with slow unwind yet.
+
+// CHECK-FAST: ERROR: AddressSanitizer: heap-buffer-overflow
+// CHECK-FAST: is located 0 bytes to the right
+// CHECK-FAST: #0{{.*}}operator new
+// CHECK-FAST-NEXT: #1{{.*}}QsortCallback
+// CHECK-FAST-NOT: MyQsort
+//
+// CHECK-SLOW: ERROR: AddressSanitizer: heap-buffer-overflow
+// CHECK-SLOW: is located 0 bytes to the right
+// CHECK-SLOW: #0{{.*}}operator new
+// CHECK-SLOW-NEXT: #1{{.*}}QsortCallback
+// CHECK-SLOW: #{{.*}}MyQsort
+// CHECK-SLOW-NEXT: #{{.*}}main
diff --git a/lib/asan/lit_tests/Linux/overflow-in-qsort.cc b/lib/asan/lit_tests/Linux/overflow-in-qsort.cc
new file mode 100644
index 000000000000..c298991a8348
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/overflow-in-qsort.cc
@@ -0,0 +1,47 @@
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=1 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-FAST
+// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=0 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-SLOW
+
+// Test how well we unwind in presence of qsort in the stack
+// (i.e. if we can unwind through a function compiled w/o frame pointers).
+// https://code.google.com/p/address-sanitizer/issues/detail?id=137
+#include <stdlib.h>
+#include <stdio.h>
+
+int global_array[10];
+volatile int one = 1;
+
+extern "C" {
+int QsortCallback(const void *a, const void *b) {
+  char *x = (char*)a;
+  char *y = (char*)b;
+  printf("Calling QsortCallback\n");
+  global_array[one * 10] = 0;  // BOOM
+  return (int)*x - (int)*y;
+}
+
+__attribute__((noinline))
+void MyQsort(char *a, size_t size) {
+  printf("Calling qsort\n");
+  qsort(a, size, sizeof(char), QsortCallback);
+  printf("Done\n");  // Avoid tail call.
+}
+}  // extern "C"
+
+int main() {
+  char a[2] = {1, 2};
+  MyQsort(a, 2);
+}
+
+// Fast unwind: can not unwind through qsort.
+
+// CHECK-FAST: ERROR: AddressSanitizer: global-buffer-overflow
+// CHECK-FAST: #0{{.*}} in QsortCallback
+// CHECK-FAST-NOT: MyQsort
+// CHECK-FAST: is located 0 bytes to the right of global variable 'global_array
+
+// CHECK-SLOW: ERROR: AddressSanitizer: global-buffer-overflow
+// CHECK-SLOW: #0{{.*}} in QsortCallback
+// CHECK-SLOW: #{{.*}} in MyQsort
+// CHECK-SLOW: #{{.*}} in main
+// CHECK-SLOW: is located 0 bytes to the right of global variable 'global_array
diff --git a/lib/asan/lit_tests/Linux/rlimit_mmap_test.cc b/lib/asan/lit_tests/Linux/rlimit_mmap_test.cc
new file mode 100644
index 000000000000..5026e24e424d
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/rlimit_mmap_test.cc
@@ -0,0 +1,16 @@
+// Check that we properly report mmap failure.
+// RUN: %clangxx_asan %s -o %t && %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <assert.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+static volatile void *x;
+
+int main(int argc, char **argv) {
+  struct rlimit mmap_resource_limit = { 0, 0 };
+  assert(0 == setrlimit(RLIMIT_AS, &mmap_resource_limit));
+  x = malloc(10000000);
+// CHECK: AddressSanitizer is unable to mmap
+  return 0;
+}
diff --git a/lib/asan/lit_tests/Linux/swapcontext_test.cc b/lib/asan/lit_tests/Linux/swapcontext_test.cc
new file mode 100644
index 000000000000..0404b4f602bd
--- /dev/null
+++ b/lib/asan/lit_tests/Linux/swapcontext_test.cc
@@ -0,0 +1,66 @@
+// Check that ASan plays well with easy cases of makecontext/swapcontext.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+ucontext_t orig_context;
+ucontext_t child_context;
+
+void Child(int mode) {
+  char x[32] = {0};  // Stack gets poisoned.
+  printf("Child: %p\n", x);
+  // (a) Do nothing, just return to parent function.
+  // (b) Jump into the original function. Stack remains poisoned unless we do
+  //     something.
+  if (mode == 1) {
+    if (swapcontext(&child_context, &orig_context) < 0) {
+      perror("swapcontext");
+      _exit(0);
+    }
+  }
+}
+
+int Run(int arg, int mode) {
+  const int kStackSize = 1 << 20;
+  char child_stack[kStackSize + 1];
+  printf("Child stack: %p\n", child_stack);
+  // Setup child context.
+  getcontext(&child_context);
+  child_context.uc_stack.ss_sp = child_stack;
+  child_context.uc_stack.ss_size = kStackSize / 2;
+  if (mode == 0) {
+    child_context.uc_link = &orig_context;
+  }
+  makecontext(&child_context, (void (*)())Child, 1, mode);
+  if (swapcontext(&orig_context, &child_context) < 0) {
+    perror("swapcontext");
+    return 0;
+  }
+  // Touch childs's stack to make sure it's unpoisoned.
+  for (int i = 0; i < kStackSize; i++) {
+    child_stack[i] = i;
+  }
+  return child_stack[arg];
+}
+
+int main(int argc, char **argv) {
+  // CHECK: WARNING: ASan doesn't fully support makecontext/swapcontext
+  int ret = 0;
+  ret += Run(argc - 1, 0);
+  printf("Test1 passed\n");
+  // CHECK: Test1 passed
+  ret += Run(argc - 1, 1);
+  printf("Test2 passed\n");
+  // CHECK: Test2 passed
+  return ret;
+}
diff --git a/lib/asan/output_tests/dlclose-test-so.cc b/lib/asan/lit_tests/SharedLibs/dlclose-test-so.cc
index 73e00507358a..73e00507358a 100644
--- a/lib/asan/output_tests/dlclose-test-so.cc
+++ b/lib/asan/lit_tests/SharedLibs/dlclose-test-so.cc
diff --git a/lib/asan/lit_tests/SharedLibs/lit.local.cfg b/lib/asan/lit_tests/SharedLibs/lit.local.cfg
new file mode 100644
index 000000000000..b3677c17a0f2
--- /dev/null
+++ b/lib/asan/lit_tests/SharedLibs/lit.local.cfg
@@ -0,0 +1,4 @@
+# Sources in this directory are compiled as shared libraries and used by
+# tests in parent directory.
+
+config.suffixes = []
diff --git a/lib/asan/output_tests/shared-lib-test-so.cc b/lib/asan/lit_tests/SharedLibs/shared-lib-test-so.cc
index 686a24578082..686a24578082 100644
--- a/lib/asan/output_tests/shared-lib-test-so.cc
+++ b/lib/asan/lit_tests/SharedLibs/shared-lib-test-so.cc
diff --git a/lib/asan/lit_tests/Unit/lit.cfg b/lib/asan/lit_tests/Unit/lit.cfg
new file mode 100644
index 000000000000..243eb7fbeec0
--- /dev/null
+++ b/lib/asan/lit_tests/Unit/lit.cfg
@@ -0,0 +1,27 @@
+# -*- Python -*-
+
+import os
+
+def get_required_attr(config, attr_name):
+  attr_value = getattr(config, attr_name, None)
+  if not attr_value:
+    lit.fatal("No attribute %r in test configuration! You may need to run "
+              "tests from your build directory or add this attribute "
+              "to lit.site.cfg " % attr_name)
+  return attr_value
+
+# Setup attributes common for all compiler-rt projects.
+llvm_src_root = get_required_attr(config, 'llvm_src_root')
+compiler_rt_lit_unit_cfg = os.path.join(llvm_src_root, "projects",
+                                        "compiler-rt", "lib",
+                                        "lit.common.unit.cfg")
+lit.load_config(config, compiler_rt_lit_unit_cfg)
+
+# Setup config name.
+config.name = 'AddressSanitizer-Unit'
+
+# Setup test source and exec root. For unit tests, we define
+# it as build directory with ASan unit tests.
+asan_binary_dir = get_required_attr(config, "asan_binary_dir")
+config.test_exec_root = os.path.join(asan_binary_dir, "tests")
+config.test_source_root = config.test_exec_root
diff --git a/lib/asan/lit_tests/Unit/lit.site.cfg.in b/lib/asan/lit_tests/Unit/lit.site.cfg.in
new file mode 100644
index 000000000000..401c3a8cc2eb
--- /dev/null
+++ b/lib/asan/lit_tests/Unit/lit.site.cfg.in
@@ -0,0 +1,10 @@
+## Autogenerated by LLVM/Clang configuration.
+# Do not edit!
+
+config.target_triple = "@TARGET_TRIPLE@"
+config.llvm_src_root = "@LLVM_SOURCE_DIR@"
+config.build_type = "@CMAKE_BUILD_TYPE@"
+config.asan_binary_dir = "@ASAN_BINARY_DIR@"
+
+# Let the main config do the real work.
+lit.load_config(config, "@ASAN_SOURCE_DIR@/lit_tests/Unit/lit.cfg")
diff --git a/lib/asan/lit_tests/blacklist.cc b/lib/asan/lit_tests/blacklist.cc
new file mode 100644
index 000000000000..6cfc1500c503
--- /dev/null
+++ b/lib/asan/lit_tests/blacklist.cc
@@ -0,0 +1,44 @@
+// Test the blacklist functionality of ASan
+
+// RUN: echo "fun:*brokenFunction*" > %tmp
+// RUN: echo "global:*badGlobal*" >> %tmp
+// RUN: echo "src:*blacklist-extra.cc" >> %tmp
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m64 -O0 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m64 -O1 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m64 -O2 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m64 -O3 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m32 -O0 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m32 -O1 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m32 -O2 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+// RUN: %clangxx_asan -fsanitize-blacklist=%tmp -m32 -O3 %s -o %t \
+// RUN: %p/Helpers/blacklist-extra.cc && %t 2>&1
+
+// badGlobal is accessed improperly, but we blacklisted it.
+int badGlobal;
+int readBadGlobal() {
+  return (&badGlobal)[1];
+}
+
+// A function which is broken, but excluded in the blacklist.
+int brokenFunction(int argc) {
+  char x[10] = {0};
+  return x[argc * 10];  // BOOM
+}
+
+// This function is defined in Helpers/blacklist-extra.cc, a source file which
+// is blacklisted by name
+int externalBrokenFunction(int x);
+
+int main(int argc, char **argv) {
+  brokenFunction(argc);
+  int x = readBadGlobal();
+  externalBrokenFunction(argc);
+  return 0;
+}
diff --git a/lib/asan/lit_tests/deep_stack_uaf.cc b/lib/asan/lit_tests/deep_stack_uaf.cc
new file mode 100644
index 000000000000..7b32798fefcc
--- /dev/null
+++ b/lib/asan/lit_tests/deep_stack_uaf.cc
@@ -0,0 +1,36 @@
+// Check that we can store lots of stack frames if asked to.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t 2>&1
+// RUN: ASAN_OPTIONS=malloc_context_size=120:redzone=512 %t 2>&1 | \
+// RUN: %symbolize | FileCheck %s
+
+// RUN: %clangxx_asan -m32 -O0 %s -o %t 2>&1
+// RUN: ASAN_OPTIONS=malloc_context_size=120:redzone=512 %t 2>&1 | \
+// RUN: %symbolize | FileCheck %s
+#include <stdlib.h>
+#include <stdio.h>
+
+template <int depth>
+struct DeepFree {
+  static void free(char *x) {
+    DeepFree<depth - 1>::free(x);
+  }
+};
+
+template<>
+struct DeepFree<0> {
+  static void free(char *x) {
+    ::free(x);
+  }
+};
+
+int main() {
+  char *x = (char*)malloc(10);
+  // deep_free(x);
+  DeepFree<200>::free(x);
+  return x[5];
+  // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
+  // CHECK: DeepFree<36>
+  // CHECK: DeepFree<98>
+  // CHECK: DeepFree<115>
+}
diff --git a/lib/asan/lit_tests/deep_tail_call.cc b/lib/asan/lit_tests/deep_tail_call.cc
new file mode 100644
index 000000000000..6aa15e81f6ec
--- /dev/null
+++ b/lib/asan/lit_tests/deep_tail_call.cc
@@ -0,0 +1,24 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+// CHECK: AddressSanitizer: global-buffer-overflow
+int global[10];
+// CHECK: {{#0.*call4}}
+void __attribute__((noinline)) call4(int i) { global[i+10]++; }
+// CHECK: {{#1.*call3}}
+void __attribute__((noinline)) call3(int i) { call4(i); }
+// CHECK: {{#2.*call2}}
+void __attribute__((noinline)) call2(int i) { call3(i); }
+// CHECK: {{#3.*call1}}
+void __attribute__((noinline)) call1(int i) { call2(i); }
+// CHECK: {{#4.*main}}
+int main(int argc, char **argv) {
+  call1(argc);
+  return global[0];
+}
diff --git a/lib/asan/lit_tests/deep_thread_stack.cc b/lib/asan/lit_tests/deep_thread_stack.cc
new file mode 100644
index 000000000000..781508d61616
--- /dev/null
+++ b/lib/asan/lit_tests/deep_thread_stack.cc
@@ -0,0 +1,61 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+#include <pthread.h>
+
+int *x;
+
+void *AllocThread(void *arg) {
+  x = new int;
+  *x = 42;
+  return NULL;
+}
+
+void *FreeThread(void *arg) {
+  delete x;
+  return NULL;
+}
+
+void *AccessThread(void *arg) {
+  *x = 43;  // BOOM
+  return NULL;
+}
+
+typedef void* (*callback_type)(void* arg);
+
+void *RunnerThread(void *function) {
+  pthread_t thread;
+  pthread_create(&thread, NULL, (callback_type)function, NULL);
+  pthread_join(thread, NULL);
+  return NULL;
+}
+
+void RunThread(callback_type function) {
+  pthread_t runner;
+  pthread_create(&runner, NULL, RunnerThread, (void*)function);
+  pthread_join(runner, NULL);
+}
+
+int main(int argc, char *argv[]) {
+  RunThread(AllocThread);
+  RunThread(FreeThread);
+  RunThread(AccessThread);
+  return (x != 0);
+}
+
+// CHECK: AddressSanitizer: heap-use-after-free
+// CHECK: WRITE of size 4 at 0x{{.*}} thread T[[ACCESS_THREAD:[0-9]+]]
+// CHECK: freed by thread T[[FREE_THREAD:[0-9]+]] here:
+// CHECK: previously allocated by thread T[[ALLOC_THREAD:[0-9]+]] here:
+// CHECK: Thread T[[ACCESS_THREAD]] created by T[[ACCESS_RUNNER:[0-9]+]] here:
+// CHECK: Thread T[[ACCESS_RUNNER]] created by T0 here:
+// CHECK: Thread T[[FREE_THREAD]] created by T[[FREE_RUNNER:[0-9]+]] here:
+// CHECK: Thread T[[FREE_RUNNER]] created by T0 here:
+// CHECK: Thread T[[ALLOC_THREAD]] created by T[[ALLOC_RUNNER:[0-9]+]] here:
+// CHECK: Thread T[[ALLOC_RUNNER]] created by T0 here:
diff --git a/lib/asan/output_tests/default_options.cc b/lib/asan/lit_tests/default_options.cc
index d6c70291e6ff..950a7d879194 100644
--- a/lib/asan/output_tests/default_options.cc
+++ b/lib/asan/lit_tests/default_options.cc
@@ -1,12 +1,15 @@
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: %t 2>&1 | FileCheck %s
+
 const char *kAsanDefaultOptions="verbosity=1 foo=bar";
 
 extern "C"
 __attribute__((no_address_safety_analysis))
 const char *__asan_default_options() {
+  // CHECK: Using the defaults from __asan_default_options: {{.*}} foo=bar
   return kAsanDefaultOptions;
 }
 
 int main() {
-  // Check-Common: foo=bar
   return 0;
 }
diff --git a/lib/asan/output_tests/dlclose-test.cc b/lib/asan/lit_tests/dlclose-test.cc
index 16126eb9042f..229f508294bf 100644
--- a/lib/asan/output_tests/dlclose-test.cc
+++ b/lib/asan/lit_tests/dlclose-test.cc
@@ -1,14 +1,3 @@
-//===----------- dlclose-test.cc --------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
 // Regression test for
 // http://code.google.com/p/address-sanitizer/issues/detail?id=19
 // Bug description:
@@ -19,7 +8,32 @@
 // 5. application starts using this mmaped memory, but asan still thinks there
 // are globals.
 // 6. BOOM
-//===----------------------------------------------------------------------===//
+
+// RUN: %clangxx_asan -m64 -O0 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %p/SharedLibs/dlclose-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | FileCheck %s
+
 #include <assert.h>
 #include <dlfcn.h>
 #include <stdio.h>
@@ -69,6 +83,6 @@ int main(int argc, char *argv[]) {
   }
   addr[1] = 2;  // BOOM (if the bug is not fixed).
   printf("PASS\n");
-  // Check-Common: PASS
+  // CHECK: PASS
   return 0;
 }
diff --git a/lib/asan/lit_tests/force_inline_opt0.cc b/lib/asan/lit_tests/force_inline_opt0.cc
new file mode 100644
index 000000000000..955ce38156fb
--- /dev/null
+++ b/lib/asan/lit_tests/force_inline_opt0.cc
@@ -0,0 +1,14 @@
+// This test checks that we are no instrumenting a memory access twice
+// (before and after inlining)
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t
+__attribute__((always_inline))
+void foo(int *x) {
+  *x = 0;
+}
+
+int main() {
+  int x;
+  foo(&x);
+  return x;
+}
diff --git a/lib/asan/lit_tests/global-overflow.cc b/lib/asan/lit_tests/global-overflow.cc
new file mode 100644
index 000000000000..6a2f12e106fe
--- /dev/null
+++ b/lib/asan/lit_tests/global-overflow.cc
@@ -0,0 +1,25 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+#include <string.h>
+int main(int argc, char **argv) {
+  static char XXX[10];
+  static char YYY[10];
+  static char ZZZ[10];
+  memset(XXX, 0, 10);
+  memset(YYY, 0, 10);
+  memset(ZZZ, 0, 10);
+  int res = YYY[argc * 10];  // BOOOM
+  // CHECK: {{READ of size 1 at 0x.* thread T0}}
+  // CHECK: {{    #0 0x.* in _?main .*global-overflow.cc:}}[[@LINE-2]]
+  // CHECK: {{0x.* is located 0 bytes to the right of global variable}}
+  // CHECK:   {{.*YYY.* of size 10}}
+  res += XXX[argc] + ZZZ[argc];
+  return res;
+}
diff --git a/lib/asan/lit_tests/heap-overflow.cc b/lib/asan/lit_tests/heap-overflow.cc
new file mode 100644
index 000000000000..2648ec7e5f1f
--- /dev/null
+++ b/lib/asan/lit_tests/heap-overflow.cc
@@ -0,0 +1,38 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char **argv) {
+  char *x = (char*)malloc(10 * sizeof(char));
+  memset(x, 0, 10);
+  int res = x[argc * 10];  // BOOOM
+  // CHECK: {{READ of size 1 at 0x.* thread T0}}
+  // CHECK: {{    #0 0x.* in _?main .*heap-overflow.cc:}}[[@LINE-2]]
+  // CHECK: {{0x.* is located 0 bytes to the right of 10-byte region}}
+  // CHECK: {{allocated by thread T0 here:}}
+
+  // CHECK-Linux: {{    #0 0x.* in .*malloc}}
+  // CHECK-Linux: {{    #1 0x.* in main .*heap-overflow.cc:21}}
+
+  // CHECK-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
+  // CHECK-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
+  // CHECK-Darwin: {{    #2 0x.* in malloc.*}}
+  // CHECK-Darwin: {{    #3 0x.* in _?main .*heap-overflow.cc:21}}
+  free(x);
+  return res;
+}
diff --git a/lib/asan/lit_tests/initialization-blacklist.cc b/lib/asan/lit_tests/initialization-blacklist.cc
new file mode 100644
index 000000000000..f8df24c68ea6
--- /dev/null
+++ b/lib/asan/lit_tests/initialization-blacklist.cc
@@ -0,0 +1,32 @@
+// Test for blacklist functionality of initialization-order checker.
+
+// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m64 -O1 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m64 -O2 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O1 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O2 %s %p/Helpers/initialization-blacklist-extra.cc\
+// RUN:   -fsanitize-blacklist=%p/Helpers/initialization-blacklist.txt \
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1
+
+// Function is defined in another TU.
+int readBadGlobal();
+int x = readBadGlobal();  // init-order bug.
+
+// Function is defined in another TU.
+int accessBadObject();
+int y = accessBadObject();  // init-order bug.
+
+int main(int argc, char **argv) {
+  return argc + x + y - 1;
+}
diff --git a/lib/asan/lit_tests/initialization-bug.cc b/lib/asan/lit_tests/initialization-bug.cc
new file mode 100644
index 000000000000..8f4e33ef5a35
--- /dev/null
+++ b/lib/asan/lit_tests/initialization-bug.cc
@@ -0,0 +1,46 @@
+// Test to make sure basic initialization order errors are caught.
+
+// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-bug-extra2.cc\
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1 \
+// RUN:    | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-bug-extra2.cc\
+// RUN:   -fsanitize=init-order -o %t && %t 2>&1 \
+// RUN:     | %symbolize | FileCheck %s
+
+// Do not test with optimization -- the error may be optimized away.
+
+#include <cstdio>
+
+// The structure of the test is:
+// "x", "y", "z" are dynamically initialized globals.
+// Value of "x" depends on "y", value of "y" depends on "z".
+// "x" and "z" are defined in this TU, "y" is defined in another one.
+// Thus we shoud stably report initialization order fiasco independently of
+// the translation unit order.
+
+int initZ() {
+  return 5;
+}
+int z = initZ();
+
+// 'y' is a dynamically initialized global residing in a different TU.  This
+// dynamic initializer will read the value of 'y' before main starts.  The
+// result is undefined behavior, which should be caught by initialization order
+// checking.
+extern int y;
+int __attribute__((noinline)) initX() {
+  return y + 1;
+  // CHECK: {{AddressSanitizer: initialization-order-fiasco}}
+  // CHECK: {{READ of size .* at 0x.* thread T0}}
+  // CHECK: {{0x.* is located 0 bytes inside of global variable .*(y|z).*}}
+}
+
+// This initializer begins our initialization order problems.
+static int x = initX();
+
+int main() {
+  // ASan should have caused an exit before main runs.
+  printf("PASS\n");
+  // CHECK-NOT: PASS
+  return 0;
+}
diff --git a/lib/asan/lit_tests/initialization-nobug.cc b/lib/asan/lit_tests/initialization-nobug.cc
new file mode 100644
index 000000000000..1b8961606811
--- /dev/null
+++ b/lib/asan/lit_tests/initialization-nobug.cc
@@ -0,0 +1,67 @@
+// A collection of various initializers which shouldn't trip up initialization
+// order checking.  If successful, this will just return 0.
+
+// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m64 -O1 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m64 -O2 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m64 -O3 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O1 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O2 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+// RUN: %clangxx_asan -m32 -O3 %s %p/Helpers/initialization-nobug-extra.cc\
+// RUN:   --std=c++11 -fsanitize=init-order -o %t && %t 2>&1
+
+// Simple access:
+// Make sure that accessing a global in the same TU is safe
+
+bool condition = true;
+int initializeSameTU() {
+  return condition ? 0x2a : 052;
+}
+int sameTU = initializeSameTU();
+
+// Linker initialized:
+// Check that access to linker initialized globals originating from a different
+// TU's initializer is safe.
+
+int A = (1 << 1) + (1 << 3) + (1 << 5), B;
+int getAB() {
+  return A * B;
+}
+
+// Function local statics:
+// Check that access to function local statics originating from a different
+// TU's initializer is safe.
+
+int countCalls() {
+  static int calls;
+  return ++calls;
+}
+
+// Constexpr:
+// We need to check that a global variable initialized with a constexpr
+// constructor can be accessed during dynamic initialization (as a constexpr
+// constructor implies that it was initialized during constant initialization,
+// not dynamic initialization).
+
+class Integer {
+  private:
+  int value;
+
+  public:
+  constexpr Integer(int x = 0) : value(x) {}
+  int getValue() {return value;}
+};
+Integer coolestInteger(42);
+int getCoolestInteger() { return coolestInteger.getValue(); }
+
+int main() { return 0; }
diff --git a/lib/asan/lit_tests/interface_symbols.c b/lib/asan/lit_tests/interface_symbols.c
new file mode 100644
index 000000000000..f3167f562922
--- /dev/null
+++ b/lib/asan/lit_tests/interface_symbols.c
@@ -0,0 +1,28 @@
+// Check the presense of interface symbols in compiled file.
+
+// RUN: %clang -fsanitize=address -dead_strip -O2 %s -o %t.exe
+// RUN: nm %t.exe | grep " T " | sed "s/.* T //" \
+// RUN:    | grep "__asan_" | sed "s/___asan_/__asan_/" \
+// RUN:    | grep -v "__asan_malloc_hook" \
+// RUN:    | grep -v "__asan_free_hook" \
+// RUN:    | grep -v "__asan_symbolize" \
+// RUN:    | grep -v "__asan_default_options" \
+// RUN:    | grep -v "__asan_on_error" > %t.symbols
+// RUN: cat %p/../../../include/sanitizer/asan_interface.h \
+// RUN:    | sed "s/\/\/.*//" | sed "s/typedef.*//" \
+// RUN:    | grep -v "OPTIONAL" \
+// RUN:    | grep "__asan_.*(" | sed "s/.* __asan_/__asan_/;s/(.*//" \
+// RUN:    > %t.interface
+// RUN: echo __asan_report_load1 >> %t.interface
+// RUN: echo __asan_report_load2 >> %t.interface
+// RUN: echo __asan_report_load4 >> %t.interface
+// RUN: echo __asan_report_load8 >> %t.interface
+// RUN: echo __asan_report_load16 >> %t.interface
+// RUN: echo __asan_report_store1 >> %t.interface
+// RUN: echo __asan_report_store2 >> %t.interface
+// RUN: echo __asan_report_store4 >> %t.interface
+// RUN: echo __asan_report_store8 >> %t.interface
+// RUN: echo __asan_report_store16 >> %t.interface
+// RUN: cat %t.interface | sort -u | diff %t.symbols -
+
+int main() { return 0; }
diff --git a/lib/asan/lit_tests/large_func_test.cc b/lib/asan/lit_tests/large_func_test.cc
new file mode 100644
index 000000000000..a74828811f74
--- /dev/null
+++ b/lib/asan/lit_tests/large_func_test.cc
@@ -0,0 +1,62 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+
+#include <stdlib.h>
+__attribute__((noinline))
+static void LargeFunction(int *x, int zero) {
+  x[0]++;
+  x[1]++;
+  x[2]++;
+  x[3]++;
+  x[4]++;
+  x[5]++;
+  x[6]++;
+  x[7]++;
+  x[8]++;
+  x[9]++;
+
+  // CHECK: {{.*ERROR: AddressSanitizer: heap-buffer-overflow on address}}
+  // CHECK:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
+  // CHECK: {{READ of size 4 at 0x.* thread T0}}
+  x[zero + 111]++;  // we should report this exact line
+  // atos incorrectly extracts the symbol name for the static functions on
+  // Darwin.
+  // CHECK-Linux:  {{#0 0x.* in LargeFunction.*large_func_test.cc:}}[[@LINE-3]]
+  // CHECK-Darwin: {{#0 0x.* in .*LargeFunction.*large_func_test.cc}}:[[@LINE-4]]
+
+  x[10]++;
+  x[11]++;
+  x[12]++;
+  x[13]++;
+  x[14]++;
+  x[15]++;
+  x[16]++;
+  x[17]++;
+  x[18]++;
+  x[19]++;
+}
+
+int main(int argc, char **argv) {
+  int *x = new int[100];
+  LargeFunction(x, argc - 1);
+  // CHECK: {{    #1 0x.* in _?main .*large_func_test.cc:}}[[@LINE-1]]
+  // CHECK: {{0x.* is located 44 bytes to the right of 400-byte region}}
+  // CHECK: {{allocated by thread T0 here:}}
+  // CHECK: {{    #0 0x.* in operator new.*}}
+  // CHECK: {{    #1 0x.* in _?main .*large_func_test.cc:}}[[@LINE-6]]
+  delete x;
+}
diff --git a/lib/asan/lit_tests/lit.cfg b/lib/asan/lit_tests/lit.cfg
new file mode 100644
index 000000000000..7875281b1f2f
--- /dev/null
+++ b/lib/asan/lit_tests/lit.cfg
@@ -0,0 +1,97 @@
+# -*- Python -*-
+
+import os
+
+# Setup config name.
+config.name = 'AddressSanitizer'
+
+# Setup source root.
+config.test_source_root = os.path.dirname(__file__)
+
+def DisplayNoConfigMessage():
+  lit.fatal("No site specific configuration available! " +
+            "Try running your test from the build tree or running " +
+            "make check-asan")
+
+# Figure out LLVM source root.
+llvm_src_root = getattr(config, 'llvm_src_root', None)
+if llvm_src_root is None:
+  # We probably haven't loaded the site-specific configuration: the user
+  # is likely trying to run a test file directly, and the site configuration
+  # wasn't created by the build system.
+  asan_site_cfg = lit.params.get('asan_site_config', None)
+  if (asan_site_cfg) and (os.path.exists(asan_site_cfg)):
+    lit.load_config(config, asan_site_cfg)
+    raise SystemExit
+
+  # Try to guess the location of site-specific configuration using llvm-config
+  # util that can point where the build tree is.
+  llvm_config = lit.util.which("llvm-config", config.environment["PATH"])
+  if not llvm_config:
+    DisplayNoConfigMessage()
+
+  # Validate that llvm-config points to the same source tree.
+  llvm_src_root = lit.util.capture(["llvm-config", "--src-root"]).strip()
+  asan_test_src_root = os.path.join(llvm_src_root, "projects", "compiler-rt",
+                                    "lib", "asan", "lit_tests")
+  if (os.path.realpath(asan_test_src_root) !=
+      os.path.realpath(config.test_source_root)):
+    DisplayNoConfigMessage()
+
+  # Find out the presumed location of generated site config.
+  llvm_obj_root = lit.util.capture(["llvm-config", "--obj-root"]).strip()
+  asan_site_cfg = os.path.join(llvm_obj_root, "projects", "compiler-rt",
+                               "lib", "asan", "lit_tests", "lit.site.cfg")
+  if (not asan_site_cfg) or (not os.path.exists(asan_site_cfg)):
+    DisplayNoConfigMessage()
+
+  lit.load_config(config, asan_site_cfg)
+  raise SystemExit
+
+# Setup attributes common for all compiler-rt projects.
+compiler_rt_lit_cfg = os.path.join(llvm_src_root, "projects", "compiler-rt",
+                                   "lib", "lit.common.cfg")
+if (not compiler_rt_lit_cfg) or (not os.path.exists(compiler_rt_lit_cfg)):
+  lit.fatal("Can't find common compiler-rt lit config at: %r"
+            % compiler_rt_lit_cfg)
+lit.load_config(config, compiler_rt_lit_cfg)
+
+# Setup default compiler flags used with -fsanitize=address option.
+# FIXME: Review the set of required flags and check if it can be reduced.
+clang_asan_cxxflags = ("-ccc-cxx "
+                      + "-fsanitize=address "
+                      + "-mno-omit-leaf-frame-pointer "
+                      + "-fno-omit-frame-pointer "
+                      + "-fno-optimize-sibling-calls "
+                      + "-g")
+config.substitutions.append( ("%clangxx_asan ", (" " + config.clang + " " +
+                                                clang_asan_cxxflags + " ")) )
+
+# Setup path to external LLVM symbolizer to run AddressSanitizer output tests.
+llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)
+if llvm_tools_dir:
+  config.environment['LLVM_SYMBOLIZER_PATH'] = os.path.join(
+      llvm_tools_dir, "llvm-symbolizer")
+
+# Setup path to symbolizer script.
+# FIXME: Instead we should copy this script to the build tree and point
+#        at it there.
+asan_source_dir = os.path.join(config.test_source_root, "..")
+symbolizer = os.path.join(asan_source_dir,
+                         'scripts', 'asan_symbolize.py')
+if not os.path.exists(symbolizer):
+  lit.fatal("Can't find symbolizer script on path %r" % symbolizer)
+# Define %symbolize substitution that filters output through
+# symbolizer and c++filt (for demangling).
+config.substitutions.append( ("%symbolize ", (" " + symbolizer +
+                                              " | c++filt " )))
+
+# Define CHECK-%os to check for OS-dependent output.
+config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))
+
+# Default test suffixes.
+config.suffixes = ['.c', '.cc', '.cpp']
+
+# AddressSanitizer tests are currently supported on Linux and Darwin only.
+if config.host_os not in ['Linux', 'Darwin']:
+  config.unsupported = True
diff --git a/lib/asan/lit_tests/lit.site.cfg.in b/lib/asan/lit_tests/lit.site.cfg.in
new file mode 100644
index 000000000000..cf439309c6ad
--- /dev/null
+++ b/lib/asan/lit_tests/lit.site.cfg.in
@@ -0,0 +1,20 @@
+## Autogenerated by LLVM/Clang configuration.
+# Do not edit!
+
+config.target_triple = "@TARGET_TRIPLE@"
+config.host_os = "@HOST_OS@"
+config.llvm_src_root = "@LLVM_SOURCE_DIR@"
+config.llvm_obj_root = "@LLVM_BINARY_DIR@"
+config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
+config.clang = "@LLVM_BINARY_DIR@/bin/clang"
+
+# LLVM tools dir can be passed in lit parameters, so try to
+# apply substitution.
+try:
+  config.llvm_tools_dir = config.llvm_tools_dir % lit.params
+except KeyError,e:
+  key, = e.args
+  lit.fatal("unable to find %r parameter, use '--param=%s=VALUE'" % (key, key))
+
+# Let the main config do the real work.
+lit.load_config(config, "@ASAN_SOURCE_DIR@/lit_tests/lit.cfg")
diff --git a/lib/asan/lit_tests/log-path_test.cc b/lib/asan/lit_tests/log-path_test.cc
new file mode 100644
index 000000000000..1072670fbff4
--- /dev/null
+++ b/lib/asan/lit_tests/log-path_test.cc
@@ -0,0 +1,39 @@
+// RUN: %clangxx_asan  %s -o %t
+
+// Regular run.
+// RUN: not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.out
+
+// Good log_path.
+// RUN: rm -f %t.log.*
+// RUN: ASAN_OPTIONS=log_path=%t.log not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-ERROR < %t.log.*
+
+// Invalid log_path.
+// RUN: ASAN_OPTIONS=log_path=/INVALID not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-INVALID < %t.out
+
+// Too long log_path.
+// RUN: ASAN_OPTIONS=log_path=`for((i=0;i<10000;i++)); do echo -n $i; done` \
+// RUN:   not %t 2> %t.out
+// RUN: FileCheck %s --check-prefix=CHECK-LONG < %t.out
+
+// Run w/o errors should not produce any log.
+// RUN: rm -f %t.log.*
+// RUN: ASAN_OPTIONS=log_path=%t.log  %t ARG ARG ARG
+// RUN: not cat %t.log.*
+
+
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char **argv) {
+  if (argc > 2) return 0;
+  char *x = (char*)malloc(10);
+  memset(x, 0, 10);
+  int res = x[argc * 10];  // BOOOM
+  free(x);
+  return res;
+}
+// CHECK-ERROR: ERROR: AddressSanitizer
+// CHECK-INVALID: ERROR: Can't open file: /INVALID
+// CHECK-LONG: ERROR: Path is too long: 01234
diff --git a/lib/asan/lit_tests/log_path_fork_test.cc b/lib/asan/lit_tests/log_path_fork_test.cc
new file mode 100644
index 000000000000..c6c1b49e994d
--- /dev/null
+++ b/lib/asan/lit_tests/log_path_fork_test.cc
@@ -0,0 +1,22 @@
+// RUN: %clangxx_asan  %s -o %t
+// RUN: rm -f %t.log.*
+// Set verbosity to 1 so that the log files are opened prior to fork().
+// RUN: ASAN_OPTIONS="log_path=%t.log verbosity=1" not %t 2> %t.out
+// RUN: for f in %t.log.* ; do FileCheck %s < $f; done
+// RUN: [ `ls %t.log.* | wc -l` == 2 ]
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+  void *x = malloc(10);
+  free(x);
+  if (fork() == -1) return 1;
+  // There are two processes at this point, thus there should be two distinct
+  // error logs.
+  free(x);
+  return 0;
+}
+
+// CHECK: ERROR: AddressSanitizer
diff --git a/lib/asan/lit_tests/malloc_delete_mismatch.cc b/lib/asan/lit_tests/malloc_delete_mismatch.cc
new file mode 100644
index 000000000000..f34b33a38fb3
--- /dev/null
+++ b/lib/asan/lit_tests/malloc_delete_mismatch.cc
@@ -0,0 +1,26 @@
+// Check that we detect malloc/delete mismatch only if the approptiate flag
+// is set.
+
+// RUN: %clangxx_asan -g %s -o %t 2>&1
+// RUN: ASAN_OPTIONS=alloc_dealloc_mismatch=1 %t 2>&1 | \
+// RUN: %symbolize | FileCheck %s
+
+// No error here.
+// RUN: ASAN_OPTIONS=alloc_dealloc_mismatch=0 %t
+#include <stdlib.h>
+
+static volatile char *x;
+
+int main() {
+  x = (char*)malloc(10);
+  x[0] = 0;
+  delete x;
+}
+// CHECK: ERROR: AddressSanitizer: alloc-dealloc-mismatch (malloc vs operator delete) on 0x
+// CHECK-NEXT: #0{{.*}}operator delete
+// CHECK: #{{.*}}main
+// CHECK: is located 0 bytes inside of 10-byte region
+// CHECK-NEXT: allocated by thread T0 here:
+// CHECK-NEXT: #0{{.*}}malloc
+// CHECK: #{{.*}}main
+// CHECK: HINT: {{.*}} you may set ASAN_OPTIONS=alloc_dealloc_mismatch=0
diff --git a/lib/asan/lit_tests/malloc_hook.cc b/lib/asan/lit_tests/malloc_hook.cc
new file mode 100644
index 000000000000..6435d105ee26
--- /dev/null
+++ b/lib/asan/lit_tests/malloc_hook.cc
@@ -0,0 +1,24 @@
+// RUN: %clangxx_asan -O2 %s -o %t
+// RUN: %t 2>&1 | FileCheck %s
+#include <stdlib.h>
+#include <unistd.h>
+
+extern "C" {
+// Note: avoid calling functions that allocate memory in malloc/free
+// to avoid infinite recursion.
+void __asan_malloc_hook(void *ptr, size_t sz) {
+  write(1, "MallocHook\n", sizeof("MallocHook\n"));
+}
+void __asan_free_hook(void *ptr) {
+  write(1, "FreeHook\n", sizeof("FreeHook\n"));
+}
+}  // extern "C"
+
+int main() {
+  volatile int *x = new int;
+  // CHECK: MallocHook
+  *x = 0;
+  delete x;
+  // CHECK: FreeHook
+  return 0;
+}
diff --git a/lib/asan/lit_tests/memcmp_test.cc b/lib/asan/lit_tests/memcmp_test.cc
new file mode 100644
index 000000000000..ac3f7f32ea75
--- /dev/null
+++ b/lib/asan/lit_tests/memcmp_test.cc
@@ -0,0 +1,19 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+#include <string.h>
+int main(int argc, char **argv) {
+  char a1[] = {argc, 2, 3, 4};
+  char a2[] = {1, 2*argc, 3, 4};
+  int res = memcmp(a1, a2, 4 + argc);  // BOOM
+  // CHECK: AddressSanitizer: stack-buffer-overflow
+  // CHECK: {{#0.*memcmp}}
+  // CHECK: {{#1.*main}}
+  return res;
+}
diff --git a/lib/asan/lit_tests/null_deref.cc b/lib/asan/lit_tests/null_deref.cc
new file mode 100644
index 000000000000..60a521d1c210
--- /dev/null
+++ b/lib/asan/lit_tests/null_deref.cc
@@ -0,0 +1,31 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+
+__attribute__((noinline))
+static void NullDeref(int *ptr) {
+  // CHECK: ERROR: AddressSanitizer: SEGV on unknown address
+  // CHECK:   {{0x0*00028 .*pc 0x.*}}
+  // CHECK: {{AddressSanitizer can not provide additional info.}}
+  ptr[10]++;  // BOOM
+  // atos on Mac cannot extract the symbol name correctly.
+  // CHECK-Linux: {{    #0 0x.* in NullDeref.*null_deref.cc:}}[[@LINE-2]]
+  // CHECK-Darwin: {{    #0 0x.* in .*NullDeref.*null_deref.cc:}}[[@LINE-3]]
+}
+int main() {
+  NullDeref((int*)0);
+  // CHECK: {{    #1 0x.* in _?main.*null_deref.cc:}}[[@LINE-1]]
+}
diff --git a/lib/asan/lit_tests/on_error_callback.cc b/lib/asan/lit_tests/on_error_callback.cc
new file mode 100644
index 000000000000..bb94d9fb579b
--- /dev/null
+++ b/lib/asan/lit_tests/on_error_callback.cc
@@ -0,0 +1,16 @@
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <stdlib.h>
+
+extern "C"
+void __asan_on_error() {
+  fprintf(stderr, "__asan_on_error called");
+}
+
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // CHECK: __asan_on_error called
+}
diff --git a/lib/asan/lit_tests/sanity_check_pure_c.c b/lib/asan/lit_tests/sanity_check_pure_c.c
new file mode 100644
index 000000000000..3d830653e33e
--- /dev/null
+++ b/lib/asan/lit_tests/sanity_check_pure_c.c
@@ -0,0 +1,19 @@
+// Sanity checking a test in pure C.
+// RUN: %clang -g -fsanitize=address -O2 %s -o %t
+// RUN: %t 2>&1 | %symbolize | FileCheck %s
+
+// Sanity checking a test in pure C with -pie.
+// RUN: %clang -g -fsanitize=address -O2 %s -pie -o %t
+// RUN: %t 2>&1 | %symbolize | FileCheck %s
+
+#include <stdlib.h>
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // CHECK: heap-use-after-free
+  // CHECK: free
+  // CHECK: main{{.*}}sanity_check_pure_c.c:[[@LINE-4]]
+  // CHECK: malloc
+  // CHECK: main{{.*}}sanity_check_pure_c.c:[[@LINE-7]]
+}
diff --git a/lib/asan/lit_tests/shared-lib-test.cc b/lib/asan/lit_tests/shared-lib-test.cc
new file mode 100644
index 000000000000..05bf3ecdf4f9
--- /dev/null
+++ b/lib/asan/lit_tests/shared-lib-test.cc
@@ -0,0 +1,54 @@
+// RUN: %clangxx_asan -m64 -O0 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %p/SharedLibs/shared-lib-test-so.cc \
+// RUN:     -fPIC -shared -o %t-so.so
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <string>
+
+using std::string;
+
+typedef void (fun_t)(int x);
+
+int main(int argc, char *argv[]) {
+  string path = string(argv[0]) + "-so.so";
+  printf("opening %s ... \n", path.c_str());
+  void *lib = dlopen(path.c_str(), RTLD_NOW);
+  if (!lib) {
+    printf("error in dlopen(): %s\n", dlerror());
+    return 1;
+  }
+  fun_t *inc = (fun_t*)dlsym(lib, "inc");
+  if (!inc) return 1;
+  printf("ok\n");
+  inc(1);
+  inc(-1);  // BOOM
+  // CHECK: {{.*ERROR: AddressSanitizer: global-buffer-overflow}}
+  // CHECK: {{READ of size 4 at 0x.* thread T0}}
+  // CHECK: {{    #0 0x.*}}
+  // CHECK: {{    #1 0x.* in _?main .*shared-lib-test.cc:}}[[@LINE-4]]
+  return 0;
+}
diff --git a/lib/asan/lit_tests/sleep_before_dying.c b/lib/asan/lit_tests/sleep_before_dying.c
new file mode 100644
index 000000000000..df9eba276039
--- /dev/null
+++ b/lib/asan/lit_tests/sleep_before_dying.c
@@ -0,0 +1,10 @@
+// RUN: %clang -g -fsanitize=address -O2 %s -o %t
+// RUN: ASAN_OPTIONS="sleep_before_dying=1" %t 2>&1 | FileCheck %s
+
+#include <stdlib.h>
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // CHECK: Sleeping for 1 second
+}
diff --git a/lib/asan/lit_tests/stack-frame-demangle.cc b/lib/asan/lit_tests/stack-frame-demangle.cc
new file mode 100644
index 000000000000..7f4d59fc5838
--- /dev/null
+++ b/lib/asan/lit_tests/stack-frame-demangle.cc
@@ -0,0 +1,24 @@
+// Check that ASan is able to print demangled frame name even w/o
+// symbolization.
+
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+
+#include <string.h>
+
+namespace XXX {
+struct YYY {
+  static int ZZZ(int x) {
+    char array[10];
+    memset(array, 0, 10);
+    return array[x];  // BOOOM
+    // CHECK: {{ERROR: AddressSanitizer: stack-buffer-overflow}}
+    // CHECK: {{READ of size 1 at 0x.* thread T0}}
+    // CHECK: {{Address 0x.* is .* frame <XXX::YYY::ZZZ(.*)>}}
+  }
+};
+};
+
+int main(int argc, char **argv) {
+  int res = XXX::YYY::ZZZ(argc + 10);
+  return res;
+}
diff --git a/lib/asan/lit_tests/stack-overflow.cc b/lib/asan/lit_tests/stack-overflow.cc
new file mode 100644
index 000000000000..3deb1e91de6c
--- /dev/null
+++ b/lib/asan/lit_tests/stack-overflow.cc
@@ -0,0 +1,19 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+
+#include <string.h>
+int main(int argc, char **argv) {
+  char x[10];
+  memset(x, 0, 10);
+  int res = x[argc * 10];  // BOOOM
+  // CHECK: {{READ of size 1 at 0x.* thread T0}}
+  // CHECK: {{    #0 0x.* in _?main .*stack-overflow.cc:}}[[@LINE-2]]
+  // CHECK: {{Address 0x.* is .* frame <main>}}
+  return res;
+}
diff --git a/lib/asan/lit_tests/stack-use-after-return.cc b/lib/asan/lit_tests/stack-use-after-return.cc
new file mode 100644
index 000000000000..f8d8a1a2ae39
--- /dev/null
+++ b/lib/asan/lit_tests/stack-use-after-return.cc
@@ -0,0 +1,45 @@
+// XFAIL: *
+// RUN: %clangxx_asan -fsanitize=use-after-return -m64 -O0 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m64 -O1 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m64 -O2 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m64 -O3 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m32 -O0 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m32 -O1 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m32 -O2 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -fsanitize=use-after-return -m32 -O3 %s -o %t && \
+// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+
+#include <stdio.h>
+
+__attribute__((noinline))
+char *Ident(char *x) {
+  fprintf(stderr, "1: %p\n", x);
+  return x;
+}
+
+__attribute__((noinline))
+char *Func1() {
+  char local;
+  return Ident(&local);
+}
+
+__attribute__((noinline))
+void Func2(char *x) {
+  fprintf(stderr, "2: %p\n", x);
+  *x = 1;
+  // CHECK: WRITE of size 1 {{.*}} thread T0
+  // CHECK:     #0{{.*}}Func2{{.*}}stack-use-after-return.cc:[[@LINE-2]]
+  // CHECK: is located {{.*}} in frame <{{.*}}Func1{{.*}}> of T0's stack
+}
+
+int main(int argc, char **argv) {
+  Func2(Func1());
+  return 0;
+}
diff --git a/lib/asan/lit_tests/strip_path_prefix.c b/lib/asan/lit_tests/strip_path_prefix.c
new file mode 100644
index 000000000000..ef7bf98ab3c2
--- /dev/null
+++ b/lib/asan/lit_tests/strip_path_prefix.c
@@ -0,0 +1,12 @@
+// RUN: %clang -g -fsanitize=address -O2 %s -o %t
+// RUN: ASAN_OPTIONS="strip_path_prefix='/'" %t 2>&1 | FileCheck %s
+
+#include <stdlib.h>
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // Check that paths in error report don't start with slash.
+  // CHECK: heap-use-after-free
+  // CHECK-NOT: #0 0x{{.*}} ({{[/].*}})
+}
diff --git a/lib/asan/lit_tests/strncpy-overflow.cc b/lib/asan/lit_tests/strncpy-overflow.cc
new file mode 100644
index 000000000000..18711843c4c8
--- /dev/null
+++ b/lib/asan/lit_tests/strncpy-overflow.cc
@@ -0,0 +1,40 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+
+#include <string.h>
+#include <stdlib.h>
+int main(int argc, char **argv) {
+  char *hello = (char*)malloc(6);
+  strcpy(hello, "hello");
+  char *short_buffer = (char*)malloc(9);
+  strncpy(short_buffer, hello, 10);  // BOOM
+  // CHECK: {{WRITE of size 1 at 0x.* thread T0}}
+  // CHECK-Linux: {{    #0 0x.* in .*strncpy}}
+  // CHECK-Darwin: {{    #0 0x.* in _?wrap_strncpy}}
+  // CHECK: {{    #1 0x.* in _?main .*strncpy-overflow.cc:}}[[@LINE-4]]
+  // CHECK: {{0x.* is located 0 bytes to the right of 9-byte region}}
+  // CHECK: {{allocated by thread T0 here:}}
+
+  // CHECK-Linux: {{    #0 0x.* in .*malloc}}
+  // CHECK-Linux: {{    #1 0x.* in main .*strncpy-overflow.cc:}}[[@LINE-10]]
+
+  // CHECK-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
+  // CHECK-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
+  // CHECK-Darwin: {{    #2 0x.* in malloc.*}}
+  // CHECK-Darwin: {{    #3 0x.* in _?main .*strncpy-overflow.cc:}}[[@LINE-15]]
+  return short_buffer[8];
+}
diff --git a/lib/asan/lit_tests/symbolize_callback.cc b/lib/asan/lit_tests/symbolize_callback.cc
new file mode 100644
index 000000000000..0691d501e24d
--- /dev/null
+++ b/lib/asan/lit_tests/symbolize_callback.cc
@@ -0,0 +1,17 @@
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <stdlib.h>
+
+extern "C"
+bool __asan_symbolize(const void *pc, char *out_buffer, int out_size) {
+  snprintf(out_buffer, out_size, "MySymbolizer");
+  return true;
+}
+
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // CHECK: MySymbolizer
+}
diff --git a/lib/asan/lit_tests/use-after-free.cc b/lib/asan/lit_tests/use-after-free.cc
new file mode 100644
index 000000000000..24d5a2a54807
--- /dev/null
+++ b/lib/asan/lit_tests/use-after-free.cc
@@ -0,0 +1,48 @@
+// RUN: %clangxx_asan -m64 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m64 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+// RUN: %clangxx_asan -m32 -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
+
+#include <stdlib.h>
+int main() {
+  char *x = (char*)malloc(10 * sizeof(char));
+  free(x);
+  return x[5];
+  // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
+  // CHECK:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
+  // CHECK: {{READ of size 1 at 0x.* thread T0}}
+  // CHECK: {{    #0 0x.* in _?main .*use-after-free.cc:22}}
+  // CHECK: {{0x.* is located 5 bytes inside of 10-byte region .0x.*,0x.*}}
+  // CHECK: {{freed by thread T0 here:}}
+
+  // CHECK-Linux: {{    #0 0x.* in .*free}}
+  // CHECK-Linux: {{    #1 0x.* in main .*use-after-free.cc:21}}
+
+  // CHECK-Darwin: {{    #0 0x.* in .*free_common.*}}
+  // CHECK-Darwin: {{    #1 0x.* in .*mz_free.*}}
+  // We override free() on Darwin, thus no malloc_zone_free
+  // CHECK-Darwin: {{    #2 0x.* in _?wrap_free}}
+  // CHECK-Darwin: {{    #3 0x.* in _?main .*use-after-free.cc:21}}
+
+  // CHECK: {{previously allocated by thread T0 here:}}
+
+  // CHECK-Linux: {{    #0 0x.* in .*malloc}}
+  // CHECK-Linux: {{    #1 0x.* in main .*use-after-free.cc:20}}
+
+  // CHECK-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
+  // CHECK-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
+  // CHECK-Darwin: {{    #2 0x.* in malloc.*}}
+  // CHECK-Darwin: {{    #3 0x.* in _?main .*use-after-free.cc:20}}
+}
diff --git a/lib/asan/lit_tests/use-after-scope-inlined.cc b/lib/asan/lit_tests/use-after-scope-inlined.cc
new file mode 100644
index 000000000000..3d730de6ab35
--- /dev/null
+++ b/lib/asan/lit_tests/use-after-scope-inlined.cc
@@ -0,0 +1,29 @@
+// Test with "-O2" only to make sure inlining (leading to use-after-scope)
+// happens. "always_inline" is not enough, as Clang doesn't emit
+// llvm.lifetime intrinsics at -O0.
+//
+// RUN: %clangxx_asan -m64 -O2 -fsanitize=use-after-scope %s -o %t && \
+// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 -fsanitize=use-after-scope %s -o %t && \
+// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+
+int *arr;
+
+__attribute__((always_inline))
+void inlined(int arg) {
+  int x[5];
+  for (int i = 0; i < arg; i++) x[i] = i;
+  arr = x;
+}
+
+int main(int argc, char *argv[]) {
+  inlined(argc);
+  return arr[argc - 1];  // BOOM
+  // CHECK: ERROR: AddressSanitizer: stack-use-after-scope
+  // CHECK: READ of size 4 at 0x{{.*}} thread T0
+  // CHECK:   #0 0x{{.*}} in {{_?}}main
+  // CHECK:      {{.*}}use-after-scope-inlined.cc:[[@LINE-4]]
+  // CHECK: Address 0x{{.*}} is located at offset
+  // CHECK:      [[OFFSET:[^ ]*]] in frame <main> of T0{{.*}}:
+  // CHECK:   {{\[}}[[OFFSET]], {{.*}}) 'x.i'
+}
diff --git a/lib/asan/output_tests/clone_test.cc b/lib/asan/output_tests/clone_test.cc
deleted file mode 100644
index b18d2550bc7c..000000000000
--- a/lib/asan/output_tests/clone_test.cc
+++ /dev/null
@@ -1,34 +0,0 @@
-#ifdef __linux__
-#include <stdio.h>
-#include <sched.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-int Child(void *arg) {
-  char x[32] = {0};  // Stack gets poisoned.
-  printf("Child:  %p\n", x);
-  _exit(1);  // NoReturn, stack will remain unpoisoned unless we do something.
-}
-
-int main(int argc, char **argv) {
-  const int kStackSize = 1 << 20;
-  char child_stack[kStackSize + 1];
-  char *sp = child_stack + kStackSize;  // Stack grows down.
-  printf("Parent: %p\n", sp);
-  pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);
-  waitpid(clone_pid, NULL, 0);
-  for (int i = 0; i < kStackSize; i++)
-    child_stack[i] = i;
-  int ret = child_stack[argc - 1];
-  printf("PASSED\n");
-  return ret;
-}
-#else  // not __linux__
-#include <stdio.h>
-int main() {
-  printf("PASSED\n");
-  // Check-Common: PASSED
-}
-#endif
diff --git a/lib/asan/output_tests/deep_tail_call.cc b/lib/asan/output_tests/deep_tail_call.cc
deleted file mode 100644
index cb69e8925197..000000000000
--- a/lib/asan/output_tests/deep_tail_call.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// Check-Common: AddressSanitizer global-buffer-overflow
-int global[10];
-// Check-Common: {{#0.*call4}}
-void __attribute__((noinline)) call4(int i) { global[i+10]++; }
-// Check-Common: {{#1.*call3}}
-void __attribute__((noinline)) call3(int i) { call4(i); }
-// Check-Common: {{#2.*call2}}
-void __attribute__((noinline)) call2(int i) { call3(i); }
-// Check-Common: {{#3.*call1}}
-void __attribute__((noinline)) call1(int i) { call2(i); }
-// Check-Common: {{#4.*main}}
-int main(int argc, char **argv) {
-  call1(argc);
-  return global[0];
-}
diff --git a/lib/asan/output_tests/global-overflow.cc b/lib/asan/output_tests/global-overflow.cc
deleted file mode 100644
index a63eb733365f..000000000000
--- a/lib/asan/output_tests/global-overflow.cc
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <string.h>
-int main(int argc, char **argv) {
-  static char XXX[10];
-  static char YYY[10];
-  static char ZZZ[10];
-  memset(XXX, 0, 10);
-  memset(YYY, 0, 10);
-  memset(ZZZ, 0, 10);
-  int res = YYY[argc * 10];  // BOOOM
-  // Check-Common: {{READ of size 1 at 0x.* thread T0}}
-  // Check-Common: {{    #0 0x.* in main .*global-overflow.cc:9}}
-  // Check-Common: {{0x.* is located 0 bytes to the right of global variable}}
-  // Check-Common:   {{.*YYY.* of size 10}}
-  res += XXX[argc] + ZZZ[argc];
-  return res;
-}
diff --git a/lib/asan/output_tests/heap-overflow.cc b/lib/asan/output_tests/heap-overflow.cc
deleted file mode 100644
index 534fbe00b355..000000000000
--- a/lib/asan/output_tests/heap-overflow.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-int main(int argc, char **argv) {
-  char *x = (char*)malloc(10 * sizeof(char));
-  memset(x, 0, 10);
-  int res = x[argc * 10];  // BOOOM
-  free(x);
-  return res;
-}
-
-// Check-Common: {{READ of size 1 at 0x.* thread T0}}
-// Check-Common: {{    #0 0x.* in main .*heap-overflow.cc:6}}
-// Check-Common: {{0x.* is located 0 bytes to the right of 10-byte region}}
-// Check-Common: {{allocated by thread T0 here:}}
-
-// Check-Linux: {{    #0 0x.* in .*malloc}}
-// Check-Linux: {{    #1 0x.* in main .*heap-overflow.cc:4}}
-
-// Check-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
-// Check-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
-// Check-Darwin: {{    #2 0x.* in malloc.*}}
-// Check-Darwin: {{    #3 0x.* in main heap-overflow.cc:4}}
diff --git a/lib/asan/output_tests/interception_failure_test-linux.cc b/lib/asan/output_tests/interception_failure_test-linux.cc
deleted file mode 100644
index 9e8b7536906b..000000000000
--- a/lib/asan/output_tests/interception_failure_test-linux.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-
-extern "C" long strtol(const char *nptr, char **endptr, int base) {
-  fprintf(stderr, "my_strtol_interceptor\n");
-  return 0;
-}
-
-int main() {
-  char *x = (char*)malloc(10 * sizeof(char));
-  free(x);
-  return (int)strtol(x, 0, 10);
-}
-
-// Check-Common: my_strtol_interceptor
-// CHECK-NOT: heap-use-after-free
-
diff --git a/lib/asan/output_tests/interception_malloc_test-linux.cc b/lib/asan/output_tests/interception_malloc_test-linux.cc
deleted file mode 100644
index 4bb3bd66de33..000000000000
--- a/lib/asan/output_tests/interception_malloc_test-linux.cc
+++ /dev/null
@@ -1,19 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-
-extern "C" void *__interceptor_malloc(size_t size);
-extern "C" void *malloc(size_t size) {
-  write(2, "malloc call\n", sizeof("malloc call\n") - 1);
-  return __interceptor_malloc(size);
-}
-
-int main() {
-  char *x = (char*)malloc(10 * sizeof(char));
-  free(x);
-  return (int)strtol(x, 0, 10);
-}
-
-// Check-Common: malloc call
-// Check-Common: heap-use-after-free
-
diff --git a/lib/asan/output_tests/interception_test-linux.cc b/lib/asan/output_tests/interception_test-linux.cc
deleted file mode 100644
index 0523510465a1..000000000000
--- a/lib/asan/output_tests/interception_test-linux.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-
-extern "C" long __interceptor_strtol(const char *nptr, char **endptr, int base);
-extern "C" long strtol(const char *nptr, char **endptr, int base) {
-  fprintf(stderr, "my_strtol_interceptor\n");
-  return __interceptor_strtol(nptr, endptr, base);
-}
-
-int main() {
-  char *x = (char*)malloc(10 * sizeof(char));
-  free(x);
-  return (int)strtol(x, 0, 10);
-}
-
-// Check-Common: my_strtol_interceptor
-// Check-Common: heap-use-after-free
-
diff --git a/lib/asan/output_tests/large_func_test.cc b/lib/asan/output_tests/large_func_test.cc
deleted file mode 100644
index 49751b39277a..000000000000
--- a/lib/asan/output_tests/large_func_test.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-#include <stdlib.h>
-__attribute__((noinline))
-static void LargeFunction(int *x, int zero) {
-  x[0]++;
-  x[1]++;
-  x[2]++;
-  x[3]++;
-  x[4]++;
-  x[5]++;
-  x[6]++;
-  x[7]++;
-  x[8]++;
-  x[9]++;
-
-  x[zero + 111]++;  // we should report this exact line
-
-  x[10]++;
-  x[11]++;
-  x[12]++;
-  x[13]++;
-  x[14]++;
-  x[15]++;
-  x[16]++;
-  x[17]++;
-  x[18]++;
-  x[19]++;
-}
-
-int main(int argc, char **argv) {
-  int *x = new int[100];
-  LargeFunction(x, argc - 1);
-  delete x;
-}
-
-// Check-Common: {{.*ERROR: AddressSanitizer heap-buffer-overflow on address}}
-// Check-Common:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
-// Check-Common: {{READ of size 4 at 0x.* thread T0}}
-
-// atos incorrectly extracts the symbol name for the static functions on
-// Darwin.
-// Check-Linux:  {{    #0 0x.* in LargeFunction.*large_func_test.cc:15}}
-// Check-Darwin: {{    #0 0x.* in .*LargeFunction.*large_func_test.cc:15}}
-
-// Check-Common: {{    #1 0x.* in main .*large_func_test.cc:31}}
-// Check-Common: {{0x.* is located 44 bytes to the right of 400-byte region}}
-// Check-Common: {{allocated by thread T0 here:}}
-// Check-Common: {{    #0 0x.* in operator new.*}}
-// Check-Common: {{    #1 0x.* in main .*large_func_test.cc:30}}
diff --git a/lib/asan/output_tests/memcmp_test.cc b/lib/asan/output_tests/memcmp_test.cc
deleted file mode 100644
index d0e5a43b4355..000000000000
--- a/lib/asan/output_tests/memcmp_test.cc
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <string.h>
-int main(int argc, char **argv) {
-  char a1[] = {argc, 2, 3, 4};
-  char a2[] = {1, 2*argc, 3, 4};
-// Check-Common: AddressSanitizer stack-buffer-overflow
-// Check-Common: {{#0.*memcmp}}
-// Check-Common: {{#1.*main}}
-  int res = memcmp(a1, a2, 4 + argc);  // BOOM
-  return res;
-}
diff --git a/lib/asan/output_tests/null_deref.cc b/lib/asan/output_tests/null_deref.cc
deleted file mode 100644
index c152a4202e33..000000000000
--- a/lib/asan/output_tests/null_deref.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-__attribute__((noinline))
-static void NullDeref(int *ptr) {
-  ptr[10]++;
-}
-int main() {
-  NullDeref((int*)0);
-}
-
-// Check-Common: {{.*ERROR: AddressSanitizer crashed on unknown address}}
-// Check-Common:   {{0x0*00028 .*pc 0x.*}}
-// Check-Common: {{AddressSanitizer can not provide additional info. ABORTING}}
-
-// atos on Mac cannot extract the symbol name correctly.
-// Check-Linux: {{    #0 0x.* in NullDeref.*null_deref.cc:3}}
-// Check-Darwin: {{    #0 0x.* in .*NullDeref.*null_deref.cc:3}}
-
-// Check-Common: {{    #1 0x.* in main.*null_deref.cc:6}}
diff --git a/lib/asan/output_tests/shared-lib-test.cc b/lib/asan/output_tests/shared-lib-test.cc
deleted file mode 100644
index 060fcde35f0d..000000000000
--- a/lib/asan/output_tests/shared-lib-test.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-//===----------- shared-lib-test.cc -----------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
-//===----------------------------------------------------------------------===//
-#include <dlfcn.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <string>
-
-using std::string;
-
-typedef void (fun_t)(int x);
-
-int main(int argc, char *argv[]) {
-  string path = string(argv[0]) + "-so.so";
-  printf("opening %s ... \n", path.c_str());
-  void *lib = dlopen(path.c_str(), RTLD_NOW);
-  if (!lib) {
-    printf("error in dlopen(): %s\n", dlerror());
-    return 1;
-  }
-  fun_t *inc = (fun_t*)dlsym(lib, "inc");
-  if (!inc) return 1;
-  printf("ok\n");
-  inc(1);
-  inc(-1);  // BOOM
-  return 0;
-}
-
-// Check-Common: {{.*ERROR: AddressSanitizer global-buffer-overflow}}
-// Check-Common: {{READ of size 4 at 0x.* thread T0}}
-// Check-Common: {{    #0 0x.*}}
-// Check-Common: {{    #1 0x.* in main .*shared-lib-test.cc:35}}
diff --git a/lib/asan/output_tests/stack-overflow.cc b/lib/asan/output_tests/stack-overflow.cc
deleted file mode 100644
index 35fa8a66c34c..000000000000
--- a/lib/asan/output_tests/stack-overflow.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <string.h>
-int main(int argc, char **argv) {
-  char x[10];
-  memset(x, 0, 10);
-  int res = x[argc * 10];  // BOOOM
-  return res;
-}
-
-// Check-Common: {{READ of size 1 at 0x.* thread T0}}
-// Check-Common: {{    #0 0x.* in main .*stack-overflow.cc:5}}
-// Check-Common: {{Address 0x.* is .* frame <main>}}
diff --git a/lib/asan/output_tests/stack-use-after-return.cc.disabled b/lib/asan/output_tests/stack-use-after-return.cc.disabled
deleted file mode 100644
index f49715737430..000000000000
--- a/lib/asan/output_tests/stack-use-after-return.cc.disabled
+++ /dev/null
@@ -1,27 +0,0 @@
-#include <stdio.h>
-
-__attribute__((noinline))
-char *Ident(char *x) {
-  fprintf(stderr, "1: %p\n", x);
-  return x;
-}
-
-__attribute__((noinline))
-char *Func1() {
-  char local;
-  return Ident(&local);
-}
-
-__attribute__((noinline))
-void Func2(char *x) {
-  fprintf(stderr, "2: %p\n", x);
-  *x = 1;
-  // Check-Common: {{WRITE of size 1 .* thread T0}}
-  // Check-Common: {{    #0.*Func2.*stack-use-after-return.cc:18}}
-  // Check-Common: {{is located in frame <.*Func1.*> of T0's stack}}
-}
-
-int main(int argc, char **argv) {
-  Func2(Func1());
-  return 0;
-}
diff --git a/lib/asan/output_tests/strncpy-overflow.cc b/lib/asan/output_tests/strncpy-overflow.cc
deleted file mode 100644
index 66d5810b7040..000000000000
--- a/lib/asan/output_tests/strncpy-overflow.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-#include <string.h>
-#include <stdlib.h>
-int main(int argc, char **argv) {
-  char *hello = (char*)malloc(6);
-  strcpy(hello, "hello");
-  char *short_buffer = (char*)malloc(9);
-  strncpy(short_buffer, hello, 10);  // BOOM
-  return short_buffer[8];
-}
-
-// Check-Common: {{WRITE of size 1 at 0x.* thread T0}}
-// Check-Linux: {{    #0 0x.* in .*strncpy}}
-// Check-Darwin: {{    #0 0x.* in wrap_strncpy}}
-// Check-Common: {{    #1 0x.* in main .*strncpy-overflow.cc:7}}
-// Check-Common: {{0x.* is located 0 bytes to the right of 9-byte region}}
-// Check-Common: {{allocated by thread T0 here:}}
-
-// Check-Linux: {{    #0 0x.* in .*malloc}}
-// Check-Linux: {{    #1 0x.* in main .*strncpy-overflow.cc:6}}
-
-// Check-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
-// Check-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
-// Check-Darwin: {{    #2 0x.* in malloc.*}}
-// Check-Darwin: {{    #3 0x.* in main .*strncpy-overflow.cc:6}}
diff --git a/lib/asan/output_tests/test_output.sh b/lib/asan/output_tests/test_output.sh
deleted file mode 100755
index 6510043396e4..000000000000
--- a/lib/asan/output_tests/test_output.sh
+++ /dev/null
@@ -1,79 +0,0 @@
-#!/bin/bash
-
-set -e # fail on any error
-
-OS=`uname`
-CXX=$1
-CC=$2
-FILE_CHECK=$3
-CXXFLAGS="-mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -g"
-SYMBOLIZER=../scripts/asan_symbolize.py
-TMP_ASAN_REPORT=asan_report.tmp
-
-run_program() {
-  ./$1 2>&1 | $SYMBOLIZER 2> /dev/null | c++filt > $TMP_ASAN_REPORT
-}
-
-# check_program exe_file source_file check_prefixf
-check_program() {
-  run_program $1
-  $FILE_CHECK $2 --check-prefix=$3 < $TMP_ASAN_REPORT
-  rm -f $TMP_ASAN_REPORT
-}
-
-C_TEST=use-after-free
-echo "Sanity checking a test in pure C"
-$CC -g -faddress-sanitizer -O2 $C_TEST.c
-check_program a.out $C_TEST.c CHECK
-rm ./a.out
-
-echo "Sanity checking a test in pure C with -pie"
-$CC -g -faddress-sanitizer -O2 $C_TEST.c -pie
-check_program a.out $C_TEST.c CHECK
-rm ./a.out
-
-echo "Testing sleep_before_dying"
-$CC -g -faddress-sanitizer -O2 $C_TEST.c
-export ASAN_OPTIONS="sleep_before_dying=1"
-check_program a.out $C_TEST.c CHECKSLEEP
-export ASAN_OPTIONS=""
-rm ./a.out
-
-# FIXME: some tests do not need to be ran for all the combinations of arch
-# and optimization mode.
-for t in  *.cc; do
-  for b in 32 64; do
-    for O in 0 1 2 3; do
-      c=`basename $t .cc`
-      if [[ "$c" == *"-so" ]]; then
-        continue
-      fi
-      if [[ "$c" == *"-linux" ]]; then
-        if [[ "$OS" != "Linux" ]]; then
-          continue
-        fi
-      fi
-      c_so=$c-so
-      exe=$c.$b.O$O
-      so=$c.$b.O$O-so.so
-      echo testing $exe
-      build_command="$CXX $CXXFLAGS -m$b -faddress-sanitizer -O$O $c.cc -o $exe"
-      [ "$DEBUG" == "1" ] && echo $build_command
-      $build_command
-      [ -e "$c_so.cc" ] && $CXX $CXXFLAGS -m$b -faddress-sanitizer -O$O $c_so.cc -fPIC -shared -o $so
-      run_program $exe
-      # Check common expected lines for OS.
-      $FILE_CHECK $c.cc --check-prefix="Check-Common" < $TMP_ASAN_REPORT
-      # Check OS-specific lines.
-      if [ `grep -c "Check-$OS" $c.cc` -gt 0 ]
-      then
-        $FILE_CHECK $c.cc --check-prefix="Check-$OS" < $TMP_ASAN_REPORT
-      fi
-      rm ./$exe
-      rm ./$TMP_ASAN_REPORT
-      [ -e "$so" ] && rm ./$so
-    done
-  done
-done
-
-exit 0
diff --git a/lib/asan/output_tests/use-after-free.c b/lib/asan/output_tests/use-after-free.c
deleted file mode 100644
index 801d3f68a466..000000000000
--- a/lib/asan/output_tests/use-after-free.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <stdlib.h>
-int main() {
-  char *x = (char*)malloc(10 * sizeof(char));
-  free(x);
-  return x[5];
-}
-
-// CHECK: heap-use-after-free
-// CHECKSLEEP: Sleeping for 1 second
diff --git a/lib/asan/output_tests/use-after-free.cc b/lib/asan/output_tests/use-after-free.cc
deleted file mode 100644
index c3e9dbe6db75..000000000000
--- a/lib/asan/output_tests/use-after-free.cc
+++ /dev/null
@@ -1,31 +0,0 @@
-#include <stdlib.h>
-int main() {
-  char *x = (char*)malloc(10 * sizeof(char));
-  free(x);
-  return x[5];
-}
-
-// Check-Common: {{.*ERROR: AddressSanitizer heap-use-after-free on address}}
-// Check-Common:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
-// Check-Common: {{READ of size 1 at 0x.* thread T0}}
-// Check-Common: {{    #0 0x.* in main .*use-after-free.cc:5}}
-// Check-Common: {{0x.* is located 5 bytes inside of 10-byte region .0x.*,0x.*}}
-// Check-Common: {{freed by thread T0 here:}}
-
-// Check-Linux: {{    #0 0x.* in .*free}}
-// Check-Linux: {{    #1 0x.* in main .*use-after-free.cc:4}}
-
-// Check-Darwin: {{    #0 0x.* in .*mz_free.*}}
-// We override free() on Darwin, thus no malloc_zone_free
-// Check-Darwin: {{    #1 0x.* in wrap_free}}
-// Check-Darwin: {{    #2 0x.* in main .*use-after-free.cc:4}}
-
-// Check-Common: {{previously allocated by thread T0 here:}}
-
-// Check-Linux: {{    #0 0x.* in .*malloc}}
-// Check-Linux: {{    #1 0x.* in main .*use-after-free.cc:3}}
-
-// Check-Darwin: {{    #0 0x.* in .*mz_malloc.*}}
-// Check-Darwin: {{    #1 0x.* in malloc_zone_malloc.*}}
-// Check-Darwin: {{    #2 0x.* in malloc.*}}
-// Check-Darwin: {{    #3 0x.* in main .*use-after-free.cc:3}}
diff --git a/lib/asan/scripts/asan_symbolize.py b/lib/asan/scripts/asan_symbolize.py
index e4897d0c7649..7b30bb55914e 100755
--- a/lib/asan/scripts/asan_symbolize.py
+++ b/lib/asan/scripts/asan_symbolize.py
@@ -7,121 +7,350 @@
 # License. See LICENSE.TXT for details.
 #
 #===------------------------------------------------------------------------===#
+import bisect
 import os
 import re
-import sys
-import string
 import subprocess
+import sys
 
-pipes = {}
+llvm_symbolizer = None
+symbolizers = {}
 filetypes = {}
-DEBUG=False
+vmaddrs = {}
+DEBUG = False
 
+
+# FIXME: merge the code that calls fix_filename().
 def fix_filename(file_name):
   for path_to_cut in sys.argv[1:]:
-    file_name = re.sub(".*" + path_to_cut, "", file_name)
-  file_name = re.sub(".*asan_[a-z_]*.cc:[0-9]*", "_asan_rtl_", file_name)
-  file_name = re.sub(".*crtstuff.c:0", "???:0", file_name)
+    file_name = re.sub('.*' + path_to_cut, '', file_name)
+  file_name = re.sub('.*asan_[a-z_]*.cc:[0-9]*', '_asan_rtl_', file_name)
+  file_name = re.sub('.*crtstuff.c:0', '???:0', file_name)
   return file_name
 
 
-# TODO(glider): need some refactoring here
-def symbolize_addr2line(line):
-  #0 0x7f6e35cf2e45  (/blah/foo.so+0x11fe45)
-  match = re.match('^( *#([0-9]+) *0x[0-9a-f]+) *\((.*)\+(0x[0-9a-f]+)\)', line)
-  if match:
-    frameno = match.group(2)
-    binary = match.group(3)
-    addr = match.group(4)
-    if not pipes.has_key(binary):
-      pipes[binary] = subprocess.Popen(["addr2line", "-f", "-e", binary],
-                         stdin=subprocess.PIPE, stdout=subprocess.PIPE)
-    p = pipes[binary]
+class Symbolizer(object):
+  def __init__(self):
+    pass
+
+  def symbolize(self, addr, binary, offset):
+    """Symbolize the given address (pair of binary and offset).
+
+    Overriden in subclasses.
+    Args:
+        addr: virtual address of an instruction.
+        binary: path to executable/shared object containing this instruction.
+        offset: instruction offset in the @binary.
+    Returns:
+        list of strings (one string for each inlined frame) describing
+        the code locations for this instruction (that is, function name, file
+        name, line and column numbers).
+    """
+    return None
+
+
+class LLVMSymbolizer(Symbolizer):
+  def __init__(self, symbolizer_path):
+    super(LLVMSymbolizer, self).__init__()
+    self.symbolizer_path = symbolizer_path
+    self.pipe = self.open_llvm_symbolizer()
+
+  def open_llvm_symbolizer(self):
+    if not os.path.exists(self.symbolizer_path):
+      return None
+    cmd = [self.symbolizer_path,
+           '--use-symbol-table=true',
+           '--demangle=false',
+           '--functions=true',
+           '--inlining=true']
+    if DEBUG:
+      print ' '.join(cmd)
+    return subprocess.Popen(cmd, stdin=subprocess.PIPE,
+                            stdout=subprocess.PIPE)
+
+  def symbolize(self, addr, binary, offset):
+    """Overrides Symbolizer.symbolize."""
+    if not self.pipe:
+      return None
+    result = []
     try:
-      print >>p.stdin, addr
-      function_name = p.stdout.readline().rstrip()
-      file_name     = p.stdout.readline().rstrip()
-    except:
-      function_name = ""
-      file_name = ""
-    file_name = fix_filename(file_name)
+      symbolizer_input = '%s %s' % (binary, offset)
+      if DEBUG:
+        print symbolizer_input
+      print >> self.pipe.stdin, symbolizer_input
+      while True:
+        function_name = self.pipe.stdout.readline().rstrip()
+        if not function_name:
+          break
+        file_name = self.pipe.stdout.readline().rstrip()
+        file_name = fix_filename(file_name)
+        if (not function_name.startswith('??') and
+            not file_name.startswith('??')):
+          # Append only valid frames.
+          result.append('%s in %s %s' % (addr, function_name,
+                                         file_name))
+    except Exception:
+      result = []
+    if not result:
+      result = None
+    return result
 
-    print match.group(1), "in", function_name, file_name
-  else:
-    print line.rstrip()
-
-
-def get_macho_filetype(binary):
-  if not filetypes.has_key(binary):
-    otool_pipe = subprocess.Popen(["otool", "-Vh",  binary],
-      stdin=subprocess.PIPE, stdout=subprocess.PIPE)
-    otool_line = "".join(otool_pipe.stdout.readlines())
-    for t in ["DYLIB", "EXECUTE"]:
-      if t in otool_line:
-        filetypes[binary] = t
-    otool_pipe.stdin.close()
-  return filetypes[binary]
-
-
-def symbolize_atos(line):
-  #0 0x7f6e35cf2e45  (/blah/foo.so+0x11fe45)
-  match = re.match('^( *#([0-9]+) *)(0x[0-9a-f]+) *\((.*)\+(0x[0-9a-f]+)\)', line)
-  if match:
-    #print line
-    prefix = match.group(1)
-    frameno = match.group(2)
-    orig_addr = match.group(3)
-    binary = match.group(4)
-    offset = match.group(5)
-    addr = orig_addr
-    load_addr = hex(int(orig_addr, 16) - int(offset, 16))
-    filetype = get_macho_filetype(binary)
-
-    if not pipes.has_key(binary):
-      # Guess which arch we're running. 10 = len("0x") + 8 hex digits.
-      if len(addr) > 10:
-        arch = "x86_64"
-      else:
-        arch = "i386"
 
-    if filetype == "DYLIB":
-      load_addr = "0x0"
+def LLVMSymbolizerFactory(system):
+  symbolizer_path = os.getenv('LLVM_SYMBOLIZER_PATH')
+  if not symbolizer_path:
+    # Assume llvm-symbolizer is in PATH.
+    symbolizer_path = 'llvm-symbolizer'
+  return LLVMSymbolizer(symbolizer_path)
+
+
+class Addr2LineSymbolizer(Symbolizer):
+  def __init__(self, binary):
+    super(Addr2LineSymbolizer, self).__init__()
+    self.binary = binary
+    self.pipe = self.open_addr2line()
+
+  def open_addr2line(self):
+    cmd = ['addr2line', '-f', '-e', self.binary]
     if DEBUG:
-      print "atos -o %s -arch %s -l %s" % (binary, arch, load_addr)
-    cmd = ["atos", "-o", binary, "-arch", arch, "-l", load_addr]
-    pipes[binary] = subprocess.Popen(cmd,
-                                     stdin=subprocess.PIPE,
-                                     stdout=subprocess.PIPE,
-                                     stderr=subprocess.PIPE)
-    p = pipes[binary]
-    if filetype == "DYLIB":
-      print >>p.stdin, "%s" % offset
+      print ' '.join(cmd)
+    return subprocess.Popen(cmd,
+                            stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+
+  def symbolize(self, addr, binary, offset):
+    """Overrides Symbolizer.symbolize."""
+    if self.binary != binary:
+      return None
+    try:
+      print >> self.pipe.stdin, offset
+      function_name = self.pipe.stdout.readline().rstrip()
+      file_name = self.pipe.stdout.readline().rstrip()
+    except Exception:
+      function_name = ''
+      file_name = ''
+    file_name = fix_filename(file_name)
+    return ['%s in %s %s' % (addr, function_name, file_name)]
+
+
+class DarwinSymbolizer(Symbolizer):
+  def __init__(self, addr, binary):
+    super(DarwinSymbolizer, self).__init__()
+    self.binary = binary
+    # Guess which arch we're running. 10 = len('0x') + 8 hex digits.
+    if len(addr) > 10:
+      self.arch = 'x86_64'
     else:
-      print >>p.stdin, "%s" % addr
-    # TODO(glider): it's more efficient to make a batch atos run for each binary.
-    p.stdin.close()
-    atos_line = p.stdout.readline().rstrip()
+      self.arch = 'i386'
+    self.vmaddr = None
+    self.pipe = None
+
+  def write_addr_to_pipe(self, offset):
+    print >> self.pipe.stdin, '0x%x' % int(offset, 16)
+
+  def open_atos(self):
+    if DEBUG:
+      print 'atos -o %s -arch %s' % (self.binary, self.arch)
+    cmdline = ['atos', '-o', self.binary, '-arch', self.arch]
+    self.pipe = subprocess.Popen(cmdline,
+                                 stdin=subprocess.PIPE,
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE)
+
+  def symbolize(self, addr, binary, offset):
+    """Overrides Symbolizer.symbolize."""
+    if self.binary != binary:
+      return None
+    self.open_atos()
+    self.write_addr_to_pipe(offset)
+    self.pipe.stdin.close()
+    atos_line = self.pipe.stdout.readline().rstrip()
     # A well-formed atos response looks like this:
     #   foo(type1, type2) (in object.name) (filename.cc:80)
     match = re.match('^(.*) \(in (.*)\) \((.*:\d*)\)$', atos_line)
-    #print "atos_line: ", atos_line
+    if DEBUG:
+      print 'atos_line: ', atos_line
     if match:
       function_name = match.group(1)
-      function_name = re.sub("\(.*?\)", "", function_name)
+      function_name = re.sub('\(.*?\)', '', function_name)
       file_name = fix_filename(match.group(3))
-      print "%s%s in %s %s" % (prefix, addr, function_name, file_name)
+      return ['%s in %s %s' % (addr, function_name, file_name)]
+    else:
+      return ['%s in %s' % (addr, atos_line)]
+
+
+# Chain several symbolizers so that if one symbolizer fails, we fall back
+# to the next symbolizer in chain.
+class ChainSymbolizer(Symbolizer):
+  def __init__(self, symbolizer_list):
+    super(ChainSymbolizer, self).__init__()
+    self.symbolizer_list = symbolizer_list
+
+  def symbolize(self, addr, binary, offset):
+    """Overrides Symbolizer.symbolize."""
+    for symbolizer in self.symbolizer_list:
+      if symbolizer:
+        result = symbolizer.symbolize(addr, binary, offset)
+        if result:
+          return result
+    return None
+
+  def append_symbolizer(self, symbolizer):
+    self.symbolizer_list.append(symbolizer)
+
+
+def BreakpadSymbolizerFactory(binary):
+  suffix = os.getenv('BREAKPAD_SUFFIX')
+  if suffix:
+    filename = binary + suffix
+    if os.access(filename, os.F_OK):
+      return BreakpadSymbolizer(filename)
+  return None
+
+
+def SystemSymbolizerFactory(system, addr, binary):
+  if system == 'Darwin':
+    return DarwinSymbolizer(addr, binary)
+  elif system == 'Linux':
+    return Addr2LineSymbolizer(binary)
+
+
+class BreakpadSymbolizer(Symbolizer):
+  def __init__(self, filename):
+    super(BreakpadSymbolizer, self).__init__()
+    self.filename = filename
+    lines = file(filename).readlines()
+    self.files = []
+    self.symbols = {}
+    self.address_list = []
+    self.addresses = {}
+    # MODULE mac x86_64 A7001116478B33F18FF9BEDE9F615F190 t
+    fragments = lines[0].rstrip().split()
+    self.arch = fragments[2]
+    self.debug_id = fragments[3]
+    self.binary = ' '.join(fragments[4:])
+    self.parse_lines(lines[1:])
+
+  def parse_lines(self, lines):
+    cur_function_addr = ''
+    for line in lines:
+      fragments = line.split()
+      if fragments[0] == 'FILE':
+        assert int(fragments[1]) == len(self.files)
+        self.files.append(' '.join(fragments[2:]))
+      elif fragments[0] == 'PUBLIC':
+        self.symbols[int(fragments[1], 16)] = ' '.join(fragments[3:])
+      elif fragments[0] in ['CFI', 'STACK']:
+        pass
+      elif fragments[0] == 'FUNC':
+        cur_function_addr = int(fragments[1], 16)
+        if not cur_function_addr in self.symbols.keys():
+          self.symbols[cur_function_addr] = ' '.join(fragments[4:])
+      else:
+        # Line starting with an address.
+        addr = int(fragments[0], 16)
+        self.address_list.append(addr)
+        # Tuple of symbol address, size, line, file number.
+        self.addresses[addr] = (cur_function_addr,
+                                int(fragments[1], 16),
+                                int(fragments[2]),
+                                int(fragments[3]))
+    self.address_list.sort()
+
+  def get_sym_file_line(self, addr):
+    key = None
+    if addr in self.addresses.keys():
+      key = addr
     else:
-      print "%s%s in %s" % (prefix, addr, atos_line)
-    del pipes[binary]
-  else:
-    print line.rstrip()
-
-system = os.uname()[0]
-if system in ['Linux', 'Darwin']:
-  for line in sys.stdin:
-    if system == 'Linux':
-      symbolize_addr2line(line)
-    elif system == 'Darwin':
-      symbolize_atos(line)
-else:
-  print 'Unknown system: ', system
+      index = bisect.bisect_left(self.address_list, addr)
+      if index == 0:
+        return None
+      else:
+        key = self.address_list[index - 1]
+    sym_id, size, line_no, file_no = self.addresses[key]
+    symbol = self.symbols[sym_id]
+    filename = self.files[file_no]
+    if addr < key + size:
+      return symbol, filename, line_no
+    else:
+      return None
+
+  def symbolize(self, addr, binary, offset):
+    if self.binary != binary:
+      return None
+    res = self.get_sym_file_line(int(offset, 16))
+    if res:
+      function_name, file_name, line_no = res
+      result = ['%s in %s %s:%d' % (
+          addr, function_name, file_name, line_no)]
+      print result
+      return result
+    else:
+      return None
+
+
+class SymbolizationLoop(object):
+  def __init__(self, binary_name_filter=None):
+    # Used by clients who may want to supply a different binary name.
+    # E.g. in Chrome several binaries may share a single .dSYM.
+    self.binary_name_filter = binary_name_filter
+    self.system = os.uname()[0]
+    if self.system in ['Linux', 'Darwin']:
+      self.llvm_symbolizer = LLVMSymbolizerFactory(self.system)
+    else:
+      raise Exception('Unknown system')
+
+  def symbolize_address(self, addr, binary, offset):
+    # Use the chain of symbolizers:
+    # Breakpad symbolizer -> LLVM symbolizer -> addr2line/atos
+    # (fall back to next symbolizer if the previous one fails).
+    if not binary in symbolizers:
+      symbolizers[binary] = ChainSymbolizer(
+          [BreakpadSymbolizerFactory(binary), self.llvm_symbolizer])
+    result = symbolizers[binary].symbolize(addr, binary, offset)
+    if result is None:
+      # Initialize system symbolizer only if other symbolizers failed.
+      symbolizers[binary].append_symbolizer(
+          SystemSymbolizerFactory(self.system, addr, binary))
+      result = symbolizers[binary].symbolize(addr, binary, offset)
+    # The system symbolizer must produce some result.
+    assert result
+    return result
+
+  def print_symbolized_lines(self, symbolized_lines):
+    if not symbolized_lines:
+      print self.current_line
+    else:
+      for symbolized_frame in symbolized_lines:
+        print '    #' + str(self.frame_no) + ' ' + symbolized_frame.rstrip()
+        self.frame_no += 1
+
+  def process_stdin(self):
+    self.frame_no = 0
+    for line in sys.stdin:
+      self.current_line = line.rstrip()
+      #0 0x7f6e35cf2e45  (/blah/foo.so+0x11fe45)
+      stack_trace_line_format = (
+          '^( *#([0-9]+) *)(0x[0-9a-f]+) *\((.*)\+(0x[0-9a-f]+)\)')
+      match = re.match(stack_trace_line_format, line)
+      if not match:
+        print self.current_line
+        continue
+      if DEBUG:
+        print line
+      _, frameno_str, addr, binary, offset = match.groups()
+      if frameno_str == '0':
+        # Assume that frame #0 is the first frame of new stack trace.
+        self.frame_no = 0
+      original_binary = binary
+      if self.binary_name_filter:
+        binary = self.binary_name_filter(binary)
+      symbolized_line = self.symbolize_address(addr, binary, offset)
+      if not symbolized_line:
+        if original_binary != binary:
+          symbolized_line = self.symbolize_address(addr, binary, offset)
+      self.print_symbolized_lines(symbolized_line)
+
+
+if __name__ == '__main__':
+  loop = SymbolizationLoop()
+  loop.process_stdin()
diff --git a/lib/asan/tests/CMakeLists.txt b/lib/asan/tests/CMakeLists.txt
index d409d50b995e..272950bc5450 100644
--- a/lib/asan/tests/CMakeLists.txt
+++ b/lib/asan/tests/CMakeLists.txt
@@ -10,109 +10,178 @@
 # instrumentation against the just-built runtime library.
 
 include(CheckCXXCompilerFlag)
+include(CompilerRTCompile)
 
 include_directories(..)
 include_directories(../..)
 
+set(ASAN_UNITTEST_HEADERS
+  asan_mac_test.h
+  asan_test_config.h
+  asan_test_utils.h)
+
 set(ASAN_UNITTEST_COMMON_CFLAGS
+  ${COMPILER_RT_GTEST_INCLUDE_CFLAGS}
+  -I${COMPILER_RT_SOURCE_DIR}/include
+  -I${COMPILER_RT_SOURCE_DIR}/lib
+  -I${COMPILER_RT_SOURCE_DIR}/lib/asan
   -Wall
   -Wno-format
-  -fvisibility=hidden
+  -Werror
+  -g
+  -O2
 )
-# Support 64-bit and 32-bit builds.
-if(LLVM_BUILD_32_BITS)
-  list(APPEND ASAN_UNITTEST_COMMON_CFLAGS -m32)
+
+if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
+  list(APPEND ASAN_UNITTEST_COMMON_CFLAGS -Wno-variadic-macros)
+endif()
+
+# Use -D instead of definitions to please custom compile command.
+if(ANDROID)
+  list(APPEND ASAN_UNITTEST_COMMON_CFLAGS
+    -DASAN_LOW_MEMORY=1
+    -DASAN_HAS_BLACKLIST=1
+    -DASAN_HAS_EXCEPTIONS=1
+    -DASAN_NEEDS_SEGV=0
+    -DASAN_UAR=0
+    -fPIE
+  )
 else()
-  list(APPEND ASAN_UNITTEST_COMMON_CFLAGS -m64)
+  list(APPEND ASAN_UNITTEST_COMMON_CFLAGS
+    -DASAN_HAS_BLACKLIST=1
+    -DASAN_HAS_EXCEPTIONS=1
+    -DASAN_NEEDS_SEGV=1
+    -DASAN_UAR=0
+  )
 endif()
 
-set(ASAN_GTEST_INCLUDE_CFLAGS
-  -I${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include
-  -I${LLVM_MAIN_SRC_DIR}/include
-  -I${LLVM_BINARY_DIR}/include
-  -D__STDC_CONSTANT_MACROS
-  -D__STDC_LIMIT_MACROS
-)
+set(ASAN_LINK_FLAGS)
+if(ANDROID)
+  # On Android, we link with ASan runtime manually
+  list(APPEND ASAN_LINK_FLAGS -pie)
+else()
+  # On other platforms, we depend on Clang driver behavior,
+  # passing -fsanitize=address flag.
+  list(APPEND ASAN_LINK_FLAGS -fsanitize=address)
+endif()
+
+# Unit tests on Mac depend on Foundation.
+if(APPLE)
+  list(APPEND ASAN_LINK_FLAGS -framework Foundation)
+endif()
+# Unit tests require libstdc++.
+list(APPEND ASAN_LINK_FLAGS -lstdc++)
+
+set(ASAN_BLACKLIST_FILE "${CMAKE_CURRENT_SOURCE_DIR}/asan_test.ignore")
 
 set(ASAN_UNITTEST_INSTRUMENTED_CFLAGS
   ${ASAN_UNITTEST_COMMON_CFLAGS}
-  ${ASAN_GTEST_INCLUDE_CFLAGS}
-  -faddress-sanitizer
-  -O2
-  -g
-  -mllvm "-asan-blacklist=${CMAKE_CURRENT_SOURCE_DIR}/asan_test.ignore"
-  -DASAN_HAS_BLACKLIST=1
-  -DASAN_HAS_EXCEPTIONS=1
-  -DASAN_NEEDS_SEGV=1
-  -DASAN_UAR=0
+  -fsanitize=address
+  -mllvm "-asan-blacklist=${ASAN_BLACKLIST_FILE}"
+  -mllvm -asan-stack=1
+  -mllvm -asan-globals=1
+  -mllvm -asan-mapping-scale=0        # default will be used
+  -mllvm -asan-mapping-offset-log=-1  # default will be used
+  -mllvm -asan-use-after-return=0
 )
 
-add_custom_target(AsanTests)
-set_target_properties(AsanTests PROPERTIES FOLDER "ASan tests")
-function(add_asan_test testname)
-  add_unittest(AsanTests ${testname} ${ARGN})
-  if(LLVM_BUILD_32_BITS)
-    target_link_libraries(${testname} clang_rt.asan-i386)
-  else()
-    target_link_libraries(${testname} clang_rt.asan-x86_64)
-  endif()
-  if (APPLE)
-    # Darwin-specific linker flags.
-    set_property(TARGET ${testname} APPEND PROPERTY
-                 LINK_FLAGS "-framework Foundation")
-  elseif (UNIX)
-    # Linux-specific linker flags.
-    set_property(TARGET ${testname} APPEND PROPERTY
-                 LINK_FLAGS "-lpthread -ldl -export-dynamic")
-  endif()
-  set(add_compile_flags "")
-  get_property(compile_flags TARGET ${testname} PROPERTY COMPILE_FLAGS)
-  foreach(arg ${ASAN_UNITTEST_COMMON_CFLAGS})
-    set(add_compile_flags "${add_compile_flags} ${arg}")
-  endforeach(arg ${ASAN_UNITTEST_COMMON_CFLAGS})
-  set_property(TARGET ${testname} PROPERTY COMPILE_FLAGS
-               "${compile_flags} ${add_compile_flags}")
-endfunction()
-
-set(ASAN_NOINST_TEST_SOURCES
-  asan_noinst_test.cc
-  asan_break_optimization.cc
-)
+# Compile source for the given architecture, using compiler
+# options in ${ARGN}, and add it to the object list.
+macro(asan_compile obj_list source arch)
+  get_filename_component(basename ${source} NAME)
+  set(output_obj "${basename}.${arch}.o")
+  get_target_flags_for_arch(${arch} TARGET_CFLAGS)
+  clang_compile(${output_obj} ${source}
+                CFLAGS ${ARGN} ${TARGET_CFLAGS}
+                DEPS gtest ${ASAN_RUNTIME_LIBRARIES}
+                           ${ASAN_UNITTEST_HEADERS}
+                           ${ASAN_BLACKLIST_FILE})
+  list(APPEND ${obj_list} ${output_obj})
+endmacro()
 
-set(ASAN_INST_TEST_OBJECTS)
-
-# We only support building instrumented tests when we're not cross compiling
-# and targeting a unix-like system where we can predict viable compilation and
-# linking strategies.
-if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX)
-
-  # This function is a custom routine to manage manually compiling source files
-  # for unit tests with the just-built Clang binary, using the ASan
-  # instrumentation, and linking them into a test executable.
-  function(add_asan_compile_command source extra_cflags)
-    set(output_obj "${source}.asan.o")
-    add_custom_command(
-      OUTPUT ${output_obj}
-      COMMAND clang
-              ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS}
-              ${extra_cflags}
-              -c -o "${output_obj}"
-              ${CMAKE_CURRENT_SOURCE_DIR}/${source}
-      MAIN_DEPENDENCY ${source}
-      DEPENDS clang clang_rt.asan-i386 clang_rt.asan-x86_64 ${ARGN}
-      )
-  endfunction()
-
-  add_asan_compile_command(asan_globals_test.cc "")
-  add_asan_compile_command(asan_test.cc "")
-  list(APPEND ASAN_INST_TEST_OBJECTS asan_globals_test.cc.asan.o
-                                     asan_test.cc.asan.o)
+# Link ASan unit test for a given architecture from a set
+# of objects in ${ARGN}.
+macro(add_asan_test test_suite test_name arch)
+  get_target_flags_for_arch(${arch} TARGET_LINK_FLAGS)
+  add_compiler_rt_test(${test_suite} ${test_name}
+                       OBJECTS ${ARGN}
+                       DEPS ${ASAN_RUNTIME_LIBRARIES} ${ARGN}
+                       LINK_FLAGS ${ASAN_LINK_FLAGS}
+                                  ${TARGET_LINK_FLAGS})
+endmacro()
+
+# Main AddressSanitizer unit tests.
+add_custom_target(AsanUnitTests)
+set_target_properties(AsanUnitTests PROPERTIES FOLDER "ASan unit tests")
+# ASan benchmarks (not actively used now).
+add_custom_target(AsanBenchmarks)
+set_target_properties(AsanBenchmarks PROPERTIES FOLDER "Asan benchmarks")
+
+# Adds ASan unit tests and benchmarks for architecture.
+macro(add_asan_tests_for_arch arch)
+  # Build gtest instrumented with ASan.
+  set(ASAN_INST_GTEST)
+  asan_compile(ASAN_INST_GTEST ${COMPILER_RT_GTEST_SOURCE} ${arch} 
+                               ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS})
+  # Instrumented tests.
+  set(ASAN_INST_TEST_OBJECTS)
+  asan_compile(ASAN_INST_TEST_OBJECTS asan_globals_test.cc ${arch}
+               ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS})
+  asan_compile(ASAN_INST_TEST_OBJECTS asan_test.cc ${arch}
+               ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS})
   if (APPLE)
-    add_asan_compile_command(asan_mac_test.mm "-ObjC")
-    list(APPEND ASAN_INST_TEST_OBJECTS asan_mac_test.mm.asan.o)
+    asan_compile(ASAN_INST_TEST_OBJECTS asan_mac_test.mm ${arch}
+                 ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS} -ObjC)
   endif()
+  # Uninstrumented tests.
+  set(ASAN_NOINST_TEST_OBJECTS)
+  asan_compile(ASAN_NOINST_TEST_OBJECTS asan_noinst_test.cc ${arch}
+               ${ASAN_UNITTEST_COMMON_CFLAGS})
+  asan_compile(ASAN_NOINST_TEST_OBJECTS asan_test_main.cc ${arch}
+               ${ASAN_UNITTEST_COMMON_CFLAGS})
+  # Link everything together.
+  add_asan_test(AsanUnitTests "Asan-${arch}-Test" ${arch}
+                ${ASAN_NOINST_TEST_OBJECTS}
+                ${ASAN_INST_TEST_OBJECTS} ${ASAN_INST_GTEST})
+
+  # Instrumented benchmarks.
+  set(ASAN_BENCHMARKS_OBJECTS)
+  asan_compile(ASAN_BENCHMARKS_OBJECTS asan_benchmarks_test.cc ${arch}
+               ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS})
+  # Link benchmarks.
+  add_asan_test(AsanBenchmarks "Asan-${arch}-Benchmark" ${arch}
+                ${ASAN_BENCHMARKS_OBJECTS} ${ASAN_INST_GTEST})
+endmacro()
 
+if(COMPILER_RT_CAN_EXECUTE_TESTS)
+  if(CAN_TARGET_x86_64)
+    add_asan_tests_for_arch(x86_64)
+  endif()
+  if(CAN_TARGET_i386)
+    add_asan_tests_for_arch(i386)
+  endif()
 endif()
 
-add_asan_test(AsanTest ${ASAN_NOINST_TEST_SOURCES}
-                       ${ASAN_INST_TEST_OBJECTS})
+if(ANDROID)
+  # We assume that unit tests on Android are built in a build
+  # tree with fresh Clang as a host compiler.
+  set(ASAN_NOINST_TEST_SOURCES asan_noinst_test.cc asan_test_main.cc)
+  set(ASAN_INST_TEST_SOURCES asan_globals_test.cc asan_test.cc)
+  add_library(asan_noinst_test OBJECT ${ASAN_NOINST_TEST_SOURCES})
+  set_target_compile_flags(asan_noinst_test ${ASAN_UNITTEST_COMMON_CFLAGS})
+  add_library(asan_inst_test OBJECT
+              ${ASAN_INST_TEST_SOURCES} ${COMPILER_RT_GTEST_SOURCE})  
+  set_target_compile_flags(asan_inst_test ${ASAN_UNITTEST_INSTRUMENTED_CFLAGS})
+  add_executable(AsanTest
+    $<TARGET_OBJECTS:asan_noinst_test>
+    $<TARGET_OBJECTS:asan_inst_test>
+  )
+  # Setup correct output directory and link flags.
+  get_unittest_directory(OUTPUT_DIR)
+  set_target_properties(AsanTest PROPERTIES
+    RUNTIME_OUTPUT_DIRECTORY ${OUTPUT_DIR})
+  set_target_link_flags(AsanTest ${ASAN_LINK_FLAGS})
+  target_link_libraries(AsanTest clang_rt.asan-arm-android)
+  # Add unit test to test suite.
+  add_dependencies(AsanUnitTests AsanTest)
+endif()
diff --git a/lib/asan/tests/asan_benchmarks_test.cc b/lib/asan/tests/asan_benchmarks_test.cc
index a142fd23e1b8..fc522de475fa 100644
--- a/lib/asan/tests/asan_benchmarks_test.cc
+++ b/lib/asan/tests/asan_benchmarks_test.cc
@@ -12,7 +12,6 @@
 // Some benchmarks for the instrumented code.
 //===----------------------------------------------------------------------===//
 
-#include "asan_test_config.h"
 #include "asan_test_utils.h"
 
 template<class T>
diff --git a/lib/asan/tests/asan_globals_test.cc b/lib/asan/tests/asan_globals_test.cc
index 6467524ca32c..dc2e9bbb0530 100644
--- a/lib/asan/tests/asan_globals_test.cc
+++ b/lib/asan/tests/asan_globals_test.cc
@@ -1,4 +1,4 @@
-//===-- asan_globals_test.cc ----------------------===//
+//===-- asan_globals_test.cc ----------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
diff --git a/lib/asan/tests/asan_mac_test.mm b/lib/asan/tests/asan_mac_test.mm
index 4e5873b74485..4cbd2bb247fd 100644
--- a/lib/asan/tests/asan_mac_test.mm
+++ b/lib/asan/tests/asan_mac_test.mm
@@ -57,7 +57,7 @@ char kStartupStr[] =
 @implementation LoadSomething
 
 +(void) load {
-  for (int i = 0; i < strlen(kStartupStr); i++) {
+  for (size_t i = 0; i < strlen(kStartupStr); i++) {
     access_memory(&kStartupStr[i]);  // make sure no optimizations occur.
   }
   // Don't print anything here not to interfere with the death tests.
@@ -66,13 +66,13 @@ char kStartupStr[] =
 @end
 
 void worker_do_alloc(int size) {
-  char * volatile mem = malloc(size);
+  char * volatile mem = (char * volatile)malloc(size);
   mem[0] = 0; // Ok
   free(mem);
 }
 
 void worker_do_crash(int size) {
-  char * volatile mem = malloc(size);
+  char * volatile mem = (char * volatile)malloc(size);
   access_memory(&mem[size]);  // BOOM
   free(mem);
 }
@@ -167,7 +167,7 @@ void TestGCDSourceEvent() {
       dispatch_time(DISPATCH_TIME_NOW, 1LL * NSEC_PER_SEC);
 
   dispatch_source_set_timer(timer, milestone, DISPATCH_TIME_FOREVER, 0);
-  char * volatile mem = malloc(10);
+  char * volatile mem = (char * volatile)malloc(10);
   dispatch_source_set_event_handler(timer, ^{
     access_memory(&mem[10]);
   });
@@ -184,7 +184,7 @@ void TestGCDSourceCancel() {
       dispatch_time(DISPATCH_TIME_NOW, 1LL * NSEC_PER_SEC);
 
   dispatch_source_set_timer(timer, milestone, DISPATCH_TIME_FOREVER, 0);
-  char * volatile mem = malloc(10);
+  char * volatile mem = (char * volatile)malloc(10);
   // Both dispatch_source_set_cancel_handler() and
   // dispatch_source_set_event_handler() use dispatch_barrier_async_f().
   // It's tricky to test dispatch_source_set_cancel_handler() separately,
@@ -202,7 +202,7 @@ void TestGCDSourceCancel() {
 void TestGCDGroupAsync() {
   dispatch_queue_t queue = dispatch_get_global_queue(0, 0);
   dispatch_group_t group = dispatch_group_create(); 
-  char * volatile mem = malloc(10);
+  char * volatile mem = (char * volatile)malloc(10);
   dispatch_group_async(group, queue, ^{
     access_memory(&mem[10]);
   });
diff --git a/lib/asan/tests/asan_noinst_test.cc b/lib/asan/tests/asan_noinst_test.cc
index 44d4c3c845b2..576312bf319f 100644
--- a/lib/asan/tests/asan_noinst_test.cc
+++ b/lib/asan/tests/asan_noinst_test.cc
@@ -1,4 +1,4 @@
-//===-- asan_noinst_test.cc ----------------------===//
+//===-- asan_noinst_test.cc -----------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -11,12 +11,13 @@
 //
 // This test file should be compiled w/o asan instrumentation.
 //===----------------------------------------------------------------------===//
+
 #include "asan_allocator.h"
-#include "asan_interface.h"
 #include "asan_internal.h"
 #include "asan_mapping.h"
 #include "asan_stack.h"
 #include "asan_test_utils.h"
+#include "sanitizer/asan_interface.h"
 
 #include <assert.h>
 #include <stdio.h>
@@ -24,15 +25,6 @@
 #include <string.h>  // for memset()
 #include <algorithm>
 #include <vector>
-#include "gtest/gtest.h"
-
-// Simple stand-alone pseudorandom number generator.
-// Current algorithm is ANSI C linear congruential PRNG.
-static inline u32 my_rand(u32* state) {
-  return (*state = *state * 1103515245 + 12345) >> 16;
-}
-
-static u32 global_seed = 0;
 
 
 TEST(AddressSanitizer, InternalSimpleDeathTest) {
@@ -40,18 +32,18 @@ TEST(AddressSanitizer, InternalSimpleDeathTest) {
 }
 
 static void MallocStress(size_t n) {
-  u32 seed = my_rand(&global_seed);
-  __asan::AsanStackTrace stack1;
+  u32 seed = my_rand();
+  __asan::StackTrace stack1;
   stack1.trace[0] = 0xa123;
   stack1.trace[1] = 0xa456;
   stack1.size = 2;
 
-  __asan::AsanStackTrace stack2;
+  __asan::StackTrace stack2;
   stack2.trace[0] = 0xb123;
   stack2.trace[1] = 0xb456;
   stack2.size = 2;
 
-  __asan::AsanStackTrace stack3;
+  __asan::StackTrace stack3;
   stack3.trace[0] = 0xc123;
   stack3.trace[1] = 0xc456;
   stack3.size = 2;
@@ -60,20 +52,21 @@ static void MallocStress(size_t n) {
   for (size_t i = 0; i < n; i++) {
     if ((i % 3) == 0) {
       if (vec.empty()) continue;
-      size_t idx = my_rand(&seed) % vec.size();
+      size_t idx = my_rand_r(&seed) % vec.size();
       void *ptr = vec[idx];
       vec[idx] = vec.back();
       vec.pop_back();
-      __asan::asan_free(ptr, &stack1);
+      __asan::asan_free(ptr, &stack1, __asan::FROM_MALLOC);
     } else {
-      size_t size = my_rand(&seed) % 1000 + 1;
-      switch ((my_rand(&seed) % 128)) {
+      size_t size = my_rand_r(&seed) % 1000 + 1;
+      switch ((my_rand_r(&seed) % 128)) {
         case 0: size += 1024; break;
         case 1: size += 2048; break;
         case 2: size += 4096; break;
       }
-      size_t alignment = 1 << (my_rand(&seed) % 10 + 1);
-      char *ptr = (char*)__asan::asan_memalign(alignment, size, &stack2);
+      size_t alignment = 1 << (my_rand_r(&seed) % 10 + 1);
+      char *ptr = (char*)__asan::asan_memalign(alignment, size,
+                                               &stack2, __asan::FROM_MALLOC);
       vec.push_back(ptr);
       ptr[0] = 0;
       ptr[size-1] = 0;
@@ -81,7 +74,7 @@ static void MallocStress(size_t n) {
     }
   }
   for (size_t i = 0; i < vec.size(); i++)
-    __asan::asan_free(vec[i], &stack3);
+    __asan::asan_free(vec[i], &stack3, __asan::FROM_MALLOC);
 }
 
 
@@ -118,7 +111,7 @@ TEST(AddressSanitizer, DISABLED_InternalPrintShadow) {
 }
 
 static uptr pc_array[] = {
-#if __WORDSIZE == 64
+#if SANITIZER_WORDSIZE == 64
   0x7effbf756068ULL,
   0x7effbf75e5abULL,
   0x7effc0625b7cULL,
@@ -164,7 +157,7 @@ static uptr pc_array[] = {
   0x7effbcc3e726ULL,
   0x7effbcc40852ULL,
   0x7effb681ec4dULL,
-#endif  // __WORDSIZE
+#endif  // SANITIZER_WORDSIZE
   0xB0B5E768,
   0x7B682EC1,
   0x367F9918,
@@ -208,22 +201,22 @@ static uptr pc_array[] = {
 };
 
 void CompressStackTraceTest(size_t n_iter) {
-  u32 seed = my_rand(&global_seed);
-  const size_t kNumPcs = ASAN_ARRAY_SIZE(pc_array);
+  u32 seed = my_rand();
+  const size_t kNumPcs = ARRAY_SIZE(pc_array);
   u32 compressed[2 * kNumPcs];
 
   for (size_t iter = 0; iter < n_iter; iter++) {
     std::random_shuffle(pc_array, pc_array + kNumPcs);
-    __asan::AsanStackTrace stack0, stack1;
+    __asan::StackTrace stack0, stack1;
     stack0.CopyFrom(pc_array, kNumPcs);
-    stack0.size = std::max((size_t)1, (size_t)(my_rand(&seed) % stack0.size));
+    stack0.size = std::max((size_t)1, (size_t)(my_rand_r(&seed) % stack0.size));
     size_t compress_size =
-      std::max((size_t)2, (size_t)my_rand(&seed) % (2 * kNumPcs));
+      std::max((size_t)2, (size_t)my_rand_r(&seed) % (2 * kNumPcs));
     size_t n_frames =
-      __asan::AsanStackTrace::CompressStack(&stack0, compressed, compress_size);
+      __asan::StackTrace::CompressStack(&stack0, compressed, compress_size);
     Ident(n_frames);
     assert(n_frames <= stack0.size);
-    __asan::AsanStackTrace::UncompressStack(&stack1, compressed, compress_size);
+    __asan::StackTrace::UncompressStack(&stack1, compressed, compress_size);
     assert(stack1.size == n_frames);
     for (size_t i = 0; i < stack1.size; i++) {
       assert(stack0.trace[i] == stack1.trace[i]);
@@ -236,17 +229,17 @@ TEST(AddressSanitizer, CompressStackTraceTest) {
 }
 
 void CompressStackTraceBenchmark(size_t n_iter) {
-  const size_t kNumPcs = ASAN_ARRAY_SIZE(pc_array);
+  const size_t kNumPcs = ARRAY_SIZE(pc_array);
   u32 compressed[2 * kNumPcs];
   std::random_shuffle(pc_array, pc_array + kNumPcs);
 
-  __asan::AsanStackTrace stack0;
+  __asan::StackTrace stack0;
   stack0.CopyFrom(pc_array, kNumPcs);
   stack0.size = kNumPcs;
   for (size_t iter = 0; iter < n_iter; iter++) {
     size_t compress_size = kNumPcs;
     size_t n_frames =
-      __asan::AsanStackTrace::CompressStack(&stack0, compressed, compress_size);
+      __asan::StackTrace::CompressStack(&stack0, compressed, compress_size);
     Ident(n_frames);
   }
 }
@@ -256,18 +249,18 @@ TEST(AddressSanitizer, CompressStackTraceBenchmark) {
 }
 
 TEST(AddressSanitizer, QuarantineTest) {
-  __asan::AsanStackTrace stack;
+  __asan::StackTrace stack;
   stack.trace[0] = 0x890;
   stack.size = 1;
 
   const int size = 32;
   void *p = __asan::asan_malloc(size, &stack);
-  __asan::asan_free(p, &stack);
+  __asan::asan_free(p, &stack, __asan::FROM_MALLOC);
   size_t i;
   size_t max_i = 1 << 30;
   for (i = 0; i < max_i; i++) {
     void *p1 = __asan::asan_malloc(size, &stack);
-    __asan::asan_free(p1, &stack);
+    __asan::asan_free(p1, &stack, __asan::FROM_MALLOC);
     if (p1 == p) break;
   }
   // fprintf(stderr, "i=%ld\n", i);
@@ -277,14 +270,14 @@ TEST(AddressSanitizer, QuarantineTest) {
 
 void *ThreadedQuarantineTestWorker(void *unused) {
   (void)unused;
-  u32 seed = my_rand(&global_seed);
-  __asan::AsanStackTrace stack;
+  u32 seed = my_rand();
+  __asan::StackTrace stack;
   stack.trace[0] = 0x890;
   stack.size = 1;
 
   for (size_t i = 0; i < 1000; i++) {
-    void *p = __asan::asan_malloc(1 + (my_rand(&seed) % 4000), &stack);
-    __asan::asan_free(p, &stack);
+    void *p = __asan::asan_malloc(1 + (my_rand_r(&seed) % 4000), &stack);
+    __asan::asan_free(p, &stack, __asan::FROM_MALLOC);
   }
   return NULL;
 }
@@ -296,8 +289,8 @@ TEST(AddressSanitizer, ThreadedQuarantineTest) {
   size_t mmaped1 = __asan_get_heap_size();
   for (int i = 0; i < n_threads; i++) {
     pthread_t t;
-    pthread_create(&t, NULL, ThreadedQuarantineTestWorker, 0);
-    pthread_join(t, 0);
+    PTHREAD_CREATE(&t, NULL, ThreadedQuarantineTestWorker, 0);
+    PTHREAD_JOIN(t, 0);
     size_t mmaped2 = __asan_get_heap_size();
     EXPECT_LT(mmaped2 - mmaped1, 320U * (1 << 20));
   }
@@ -305,7 +298,7 @@ TEST(AddressSanitizer, ThreadedQuarantineTest) {
 
 void *ThreadedOneSizeMallocStress(void *unused) {
   (void)unused;
-  __asan::AsanStackTrace stack;
+  __asan::StackTrace stack;
   stack.trace[0] = 0x890;
   stack.size = 1;
   const size_t kNumMallocs = 1000;
@@ -315,7 +308,7 @@ void *ThreadedOneSizeMallocStress(void *unused) {
       p[i] = __asan::asan_malloc(32, &stack);
     }
     for (size_t i = 0; i < kNumMallocs; i++) {
-      __asan::asan_free(p[i], &stack);
+      __asan::asan_free(p[i], &stack, __asan::FROM_MALLOC);
     }
   }
   return NULL;
@@ -325,10 +318,10 @@ TEST(AddressSanitizer, ThreadedOneSizeMallocStressTest) {
   const int kNumThreads = 4;
   pthread_t t[kNumThreads];
   for (int i = 0; i < kNumThreads; i++) {
-    pthread_create(&t[i], 0, ThreadedOneSizeMallocStress, 0);
+    PTHREAD_CREATE(&t[i], 0, ThreadedOneSizeMallocStress, 0);
   }
   for (int i = 0; i < kNumThreads; i++) {
-    pthread_join(t[i], 0);
+    PTHREAD_JOIN(t[i], 0);
   }
 }
 
@@ -336,16 +329,20 @@ TEST(AddressSanitizer, MemsetWildAddressTest) {
   typedef void*(*memset_p)(void*, int, size_t);
   // Prevent inlining of memset().
   volatile memset_p libc_memset = (memset_p)memset;
-  EXPECT_DEATH(libc_memset((void*)(kLowShadowBeg + kPageSize), 0, 100),
+  EXPECT_DEATH(libc_memset((void*)(kLowShadowBeg + 200), 0, 100),
                "unknown-crash.*low shadow");
-  EXPECT_DEATH(libc_memset((void*)(kShadowGapBeg + kPageSize), 0, 100),
+  EXPECT_DEATH(libc_memset((void*)(kShadowGapBeg + 200), 0, 100),
                "unknown-crash.*shadow gap");
-  EXPECT_DEATH(libc_memset((void*)(kHighShadowBeg + kPageSize), 0, 100),
+  EXPECT_DEATH(libc_memset((void*)(kHighShadowBeg + 200), 0, 100),
                "unknown-crash.*high shadow");
 }
 
 TEST(AddressSanitizerInterface, GetEstimatedAllocatedSize) {
+#if ASAN_ALLOCATOR_VERSION == 1
   EXPECT_EQ(1U, __asan_get_estimated_allocated_size(0));
+#elif ASAN_ALLOCATOR_VERSION == 2
+  EXPECT_EQ(0U, __asan_get_estimated_allocated_size(0));
+#endif
   const size_t sizes[] = { 1, 30, 1<<30 };
   for (size_t i = 0; i < 3; i++) {
     EXPECT_EQ(sizes[i], __asan_get_estimated_allocated_size(sizes[i]));
@@ -370,23 +367,32 @@ TEST(AddressSanitizerInterface, GetAllocatedSizeAndOwnershipTest) {
   // We cannot call GetAllocatedSize from the memory we didn't map,
   // and from the interior pointers (not returned by previous malloc).
   void *wild_addr = (void*)0x1;
-  EXPECT_EQ(false, __asan_get_ownership(wild_addr));
+  EXPECT_FALSE(__asan_get_ownership(wild_addr));
   EXPECT_DEATH(__asan_get_allocated_size(wild_addr), kGetAllocatedSizeErrorMsg);
-  EXPECT_EQ(false, __asan_get_ownership(array + kArraySize / 2));
+  EXPECT_FALSE(__asan_get_ownership(array + kArraySize / 2));
   EXPECT_DEATH(__asan_get_allocated_size(array + kArraySize / 2),
                kGetAllocatedSizeErrorMsg);
 
   // NULL is not owned, but is a valid argument for __asan_get_allocated_size().
-  EXPECT_EQ(false, __asan_get_ownership(NULL));
+  EXPECT_FALSE(__asan_get_ownership(NULL));
   EXPECT_EQ(0U, __asan_get_allocated_size(NULL));
 
   // When memory is freed, it's not owned, and call to GetAllocatedSize
   // is forbidden.
   free(array);
-  EXPECT_EQ(false, __asan_get_ownership(array));
+  EXPECT_FALSE(__asan_get_ownership(array));
   EXPECT_DEATH(__asan_get_allocated_size(array), kGetAllocatedSizeErrorMsg);
-
   delete int_ptr;
+
+  void *zero_alloc = Ident(malloc(0));
+  if (zero_alloc != 0) {
+    // If malloc(0) is not null, this pointer is owned and should have valid
+    // allocated size.
+    EXPECT_TRUE(__asan_get_ownership(zero_alloc));
+    // Allocated size is 0 or 1 depending on the allocator used.
+    EXPECT_LT(__asan_get_allocated_size(zero_alloc), 2U);
+  }
+  free(zero_alloc);
 }
 
 TEST(AddressSanitizerInterface, GetCurrentAllocatedBytesTest) {
@@ -410,6 +416,7 @@ static void DoDoubleFree() {
   delete Ident(x);
 }
 
+#if ASAN_ALLOCATOR_VERSION == 1
 // This test is run in a separate process, so that large malloced
 // chunk won't remain in the free lists after the test.
 // Note: use ASSERT_* instead of EXPECT_* here.
@@ -441,9 +448,26 @@ static void RunGetHeapSizeTestAndDie() {
 TEST(AddressSanitizerInterface, GetHeapSizeTest) {
   EXPECT_DEATH(RunGetHeapSizeTestAndDie(), "double-free");
 }
+#elif ASAN_ALLOCATOR_VERSION == 2
+TEST(AddressSanitizerInterface, GetHeapSizeTest) {
+  // asan_allocator2 does not keep huge chunks in free list, but unmaps them.
+  // The chunk should be greater than the quarantine size,
+  // otherwise it will be stuck in quarantine instead of being unmaped.
+  static const size_t kLargeMallocSize = 1 << 29;  // 512M
+  uptr old_heap_size = __asan_get_heap_size();
+  for (int i = 0; i < 3; i++) {
+    // fprintf(stderr, "allocating %zu bytes:\n", kLargeMallocSize);
+    free(Ident(malloc(kLargeMallocSize)));
+    EXPECT_EQ(old_heap_size, __asan_get_heap_size());
+  }
+}
+#endif
 
 // Note: use ASSERT_* instead of EXPECT_* here.
 static void DoLargeMallocForGetFreeBytesTestAndDie() {
+#if ASAN_ALLOCATOR_VERSION == 1
+  // asan_allocator2 does not keep large chunks in free_lists, so this test
+  // will not work.
   size_t old_free_bytes, new_free_bytes;
   static const size_t kLargeMallocSize = 1 << 29;  // 512M
   // If we malloc and free a large memory chunk, it will not fall
@@ -455,33 +479,42 @@ static void DoLargeMallocForGetFreeBytesTestAndDie() {
   new_free_bytes = __asan_get_free_bytes();
   fprintf(stderr, "free bytes after malloc and free: %zu\n", new_free_bytes);
   ASSERT_GE(new_free_bytes, old_free_bytes + kLargeMallocSize);
+#endif  // ASAN_ALLOCATOR_VERSION
   // Test passed.
   DoDoubleFree();
 }
 
 TEST(AddressSanitizerInterface, GetFreeBytesTest) {
-  static const size_t kNumOfChunks = 100;
-  static const size_t kChunkSize = 100;
-  char *chunks[kNumOfChunks];
-  size_t i;
-  size_t old_free_bytes, new_free_bytes;
+#if ASAN_ALLOCATOR_VERSION == 1
   // Allocate a small chunk. Now allocator probably has a lot of these
   // chunks to fulfill future requests. So, future requests will decrease
-  // the number of free bytes.
-  chunks[0] = Ident((char*)malloc(kChunkSize));
-  old_free_bytes = __asan_get_free_bytes();
-  for (i = 1; i < kNumOfChunks; i++) {
-    chunks[i] = Ident((char*)malloc(kChunkSize));
-    new_free_bytes = __asan_get_free_bytes();
-    EXPECT_LT(new_free_bytes, old_free_bytes);
-    old_free_bytes = new_free_bytes;
+  // the number of free bytes. Do this only on systems where there
+  // is enough memory for such assumptions.
+  if (SANITIZER_WORDSIZE == 64 && !ASAN_LOW_MEMORY) {
+    static const size_t kNumOfChunks = 100;
+    static const size_t kChunkSize = 100;
+    char *chunks[kNumOfChunks];
+    size_t i;
+    size_t old_free_bytes, new_free_bytes;
+    chunks[0] = Ident((char*)malloc(kChunkSize));
+    old_free_bytes = __asan_get_free_bytes();
+    for (i = 1; i < kNumOfChunks; i++) {
+      chunks[i] = Ident((char*)malloc(kChunkSize));
+      new_free_bytes = __asan_get_free_bytes();
+      EXPECT_LT(new_free_bytes, old_free_bytes);
+      old_free_bytes = new_free_bytes;
+    }
+    for (i = 0; i < kNumOfChunks; i++)
+      free(chunks[i]);
   }
+#endif
   EXPECT_DEATH(DoLargeMallocForGetFreeBytesTestAndDie(), "double-free");
 }
 
-static const size_t kManyThreadsMallocSizes[] = {5, 1UL<<10, 1UL<<20, 357};
+static const size_t kManyThreadsMallocSizes[] = {5, 1UL<<10, 1UL<<14, 357};
 static const size_t kManyThreadsIterations = 250;
-static const size_t kManyThreadsNumThreads = (__WORDSIZE == 32) ? 40 : 200;
+static const size_t kManyThreadsNumThreads =
+  (SANITIZER_WORDSIZE == 32) ? 40 : 200;
 
 void *ManyThreadsWithStatsWorker(void *arg) {
   (void)arg;
@@ -490,6 +523,8 @@ void *ManyThreadsWithStatsWorker(void *arg) {
       free(Ident(malloc(kManyThreadsMallocSizes[size_index])));
     }
   }
+  // Just one large allocation.
+  free(Ident(malloc(1 << 20)));
   return 0;
 }
 
@@ -498,11 +533,11 @@ TEST(AddressSanitizerInterface, ManyThreadsWithStatsStressTest) {
   pthread_t threads[kManyThreadsNumThreads];
   before_test = __asan_get_current_allocated_bytes();
   for (i = 0; i < kManyThreadsNumThreads; i++) {
-    pthread_create(&threads[i], 0,
+    PTHREAD_CREATE(&threads[i], 0,
                    (void* (*)(void *x))ManyThreadsWithStatsWorker, (void*)i);
   }
   for (i = 0; i < kManyThreadsNumThreads; i++) {
-    pthread_join(threads[i], 0);
+    PTHREAD_JOIN(threads[i], 0);
   }
   after_test = __asan_get_current_allocated_bytes();
   // ASan stats also reflect memory usage of internal ASan RTL structs,
@@ -649,6 +684,45 @@ TEST(AddressSanitizerInterface, PoisoningStressTest) {
   }
 }
 
+TEST(AddressSanitizerInterface, PoisonedRegion) {
+  size_t rz = 16;
+  for (size_t size = 1; size <= 64; size++) {
+    char *p = new char[size];
+    uptr x = reinterpret_cast<uptr>(p);
+    for (size_t beg = 0; beg < size + rz; beg++) {
+      for (size_t end = beg; end < size + rz; end++) {
+        uptr first_poisoned = __asan_region_is_poisoned(x + beg, end - beg);
+        if (beg == end) {
+          EXPECT_FALSE(first_poisoned);
+        } else if (beg < size && end <= size) {
+          EXPECT_FALSE(first_poisoned);
+        } else if (beg >= size) {
+          EXPECT_EQ(x + beg, first_poisoned);
+        } else {
+          EXPECT_GT(end, size);
+          EXPECT_EQ(x + size, first_poisoned);
+        }
+      }
+    }
+    delete [] p;
+  }
+}
+
+// This is a performance benchmark for manual runs.
+// asan's memset interceptor calls mem_is_zero for the entire shadow region.
+// the profile should look like this:
+//     89.10%   [.] __memset_sse2
+//     10.50%   [.] __sanitizer::mem_is_zero
+// I.e. mem_is_zero should consume ~ SHADOW_GRANULARITY less CPU cycles
+// than memset itself.
+TEST(AddressSanitizerInterface, DISABLED_Stress_memset) {
+  size_t size = 1 << 20;
+  char *x = new char[size];
+  for (int i = 0; i < 100000; i++)
+    Ident(memset)(x, 0, size);
+  delete [] x;
+}
+
 static const char *kInvalidPoisonMessage = "invalid-poison-memory-range";
 static const char *kInvalidUnpoisonMessage = "invalid-unpoison-memory-range";
 
@@ -670,20 +744,29 @@ TEST(AddressSanitizerInterface, DISABLED_InvalidPoisonAndUnpoisonCallsTest) {
 }
 
 static void ErrorReportCallbackOneToZ(const char *report) {
-  write(2, "ABCDEF", 6);
+  int report_len = strlen(report);
+  ASSERT_EQ(6, write(2, "ABCDEF", 6));
+  ASSERT_EQ(report_len, write(2, report, report_len));
+  ASSERT_EQ(6, write(2, "ABCDEF", 6));
+  _exit(1);
 }
 
 TEST(AddressSanitizerInterface, SetErrorReportCallbackTest) {
   __asan_set_error_report_callback(ErrorReportCallbackOneToZ);
-  EXPECT_DEATH(__asan_report_error(0, 0, 0, 0, true, 1), "ABCDEF");
+  EXPECT_DEATH(__asan_report_error(0, 0, 0, 0, true, 1),
+               ASAN_PCRE_DOTALL "ABCDEF.*AddressSanitizer.*WRITE.*ABCDEF");
   __asan_set_error_report_callback(NULL);
 }
 
 TEST(AddressSanitizerInterface, GetOwnershipStressTest) {
   std::vector<char *> pointers;
   std::vector<size_t> sizes;
+#if ASAN_ALLOCATOR_VERSION == 1
   const size_t kNumMallocs =
-      (__WORDSIZE <= 32 || ASAN_LOW_MEMORY) ? 1 << 10 : 1 << 14;
+      (SANITIZER_WORDSIZE <= 32 || ASAN_LOW_MEMORY) ? 1 << 10 : 1 << 14;
+#elif ASAN_ALLOCATOR_VERSION == 2  // too slow with asan_allocator2. :(
+  const size_t kNumMallocs = 1 << 9;
+#endif
   for (size_t i = 0; i < kNumMallocs; i++) {
     size_t size = i * 100 + 1;
     pointers.push_back((char*)malloc(size));
diff --git a/lib/asan/tests/asan_test.cc b/lib/asan/tests/asan_test.cc
index 8e967e929899..5fa65b2af5dc 100644
--- a/lib/asan/tests/asan_test.cc
+++ b/lib/asan/tests/asan_test.cc
@@ -1,4 +1,4 @@
-//===-- asan_test.cc ----------------------===//
+//===-- asan_test.cc ------------------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -19,17 +19,26 @@
 #include <stdint.h>
 #include <setjmp.h>
 #include <assert.h>
+#include <algorithm>
+
+#ifdef __linux__
+# include <sys/prctl.h>
+# include <sys/types.h>
+# include <sys/stat.h>
+# include <fcntl.h>
+#include <unistd.h>
+#endif
 
 #if defined(__i386__) || defined(__x86_64__)
 #include <emmintrin.h>
 #endif
 
-#include "asan_test_config.h"
 #include "asan_test_utils.h"
 
 #ifndef __APPLE__
 #include <malloc.h>
 #else
+#include <malloc/malloc.h>
 #include <AvailabilityMacros.h>  // For MAC_OS_X_VERSION_*
 #include <CoreFoundation/CFString.h>
 #endif  // __APPLE__
@@ -47,17 +56,8 @@ typedef uint16_t  U2;
 typedef uint32_t  U4;
 typedef uint64_t  U8;
 
-static const char *progname;
 static const int kPageSize = 4096;
 
-// Simple stand-alone pseudorandom number generator.
-// Current algorithm is ANSI C linear congruential PRNG.
-static inline uint32_t my_rand(uint32_t* state) {
-  return (*state = *state * 1103515245 + 12345) >> 16;
-}
-
-static uint32_t global_seed = 0;
-
 const size_t kLargeMalloc = 1 << 24;
 
 template<typename T>
@@ -66,7 +66,7 @@ NOINLINE void asan_write(T *a) {
 }
 
 NOINLINE void asan_write_sized_aligned(uint8_t *p, size_t size) {
-  EXPECT_EQ(0, ((uintptr_t)p % size));
+  EXPECT_EQ(0U, ((uintptr_t)p % size));
   if      (size == 1) asan_write((uint8_t*)p);
   else if (size == 2) asan_write((uint16_t*)p);
   else if (size == 4) asan_write((uint32_t*)p);
@@ -130,6 +130,8 @@ NOINLINE void uaf_test(int size, int off) {
 TEST(AddressSanitizer, HasFeatureAddressSanitizerTest) {
 #if defined(__has_feature) && __has_feature(address_sanitizer)
   bool asan = 1;
+#elif defined(__SANITIZE_ADDRESS__)
+  bool asan = 1;
 #else
   bool asan = 0;
 #endif
@@ -141,29 +143,24 @@ TEST(AddressSanitizer, SimpleDeathTest) {
 }
 
 TEST(AddressSanitizer, VariousMallocsTest) {
-  // fprintf(stderr, "malloc:\n");
   int *a = (int*)malloc(100 * sizeof(int));
   a[50] = 0;
   free(a);
 
-  // fprintf(stderr, "realloc:\n");
   int *r = (int*)malloc(10);
   r = (int*)realloc(r, 2000 * sizeof(int));
   r[1000] = 0;
   free(r);
 
-  // fprintf(stderr, "operator new []\n");
   int *b = new int[100];
   b[50] = 0;
   delete [] b;
 
-  // fprintf(stderr, "operator new\n");
   int *c = new int;
   *c = 0;
   delete c;
 
-#if !defined(__APPLE__) && !defined(ANDROID)
-  // fprintf(stderr, "posix_memalign\n");
+#if !defined(__APPLE__) && !defined(ANDROID) && !defined(__ANDROID__)
   int *pm;
   int pm_res = posix_memalign((void**)&pm, kPageSize, kPageSize);
   EXPECT_EQ(0, pm_res);
@@ -172,7 +169,7 @@ TEST(AddressSanitizer, VariousMallocsTest) {
 
 #if !defined(__APPLE__)
   int *ma = (int*)memalign(kPageSize, kPageSize);
-  EXPECT_EQ(0, (uintptr_t)ma % kPageSize);
+  EXPECT_EQ(0U, (uintptr_t)ma % kPageSize);
   ma[123] = 0;
   free(ma);
 #endif  // __APPLE__
@@ -186,19 +183,19 @@ TEST(AddressSanitizer, CallocTest) {
 
 TEST(AddressSanitizer, VallocTest) {
   void *a = valloc(100);
-  EXPECT_EQ(0, (uintptr_t)a % kPageSize);
+  EXPECT_EQ(0U, (uintptr_t)a % kPageSize);
   free(a);
 }
 
 #ifndef __APPLE__
 TEST(AddressSanitizer, PvallocTest) {
   char *a = (char*)pvalloc(kPageSize + 100);
-  EXPECT_EQ(0, (uintptr_t)a % kPageSize);
+  EXPECT_EQ(0U, (uintptr_t)a % kPageSize);
   a[kPageSize + 101] = 1;  // we should not report an error here.
   free(a);
 
   a = (char*)pvalloc(0);  // pvalloc(0) should allocate at least one page.
-  EXPECT_EQ(0, (uintptr_t)a % kPageSize);
+  EXPECT_EQ(0U, (uintptr_t)a % kPageSize);
   a[101] = 1;  // we should not report an error here.
   free(a);
 }
@@ -214,8 +211,8 @@ void *TSDWorker(void *test_key) {
 void TSDDestructor(void *tsd) {
   // Spawning a thread will check that the current thread id is not -1.
   pthread_t th;
-  pthread_create(&th, NULL, TSDWorker, NULL);
-  pthread_join(th, NULL);
+  PTHREAD_CREATE(&th, NULL, TSDWorker, NULL);
+  PTHREAD_JOIN(th, NULL);
 }
 
 // This tests triggers the thread-specific data destruction fiasco which occurs
@@ -229,8 +226,8 @@ TEST(AddressSanitizer, DISABLED_TSDTest) {
   pthread_t th;
   pthread_key_t test_key;
   pthread_key_create(&test_key, TSDDestructor);
-  pthread_create(&th, NULL, TSDWorker, &test_key);
-  pthread_join(th, NULL);
+  PTHREAD_CREATE(&th, NULL, TSDWorker, &test_key);
+  PTHREAD_JOIN(th, NULL);
   pthread_key_delete(test_key);
 }
 
@@ -245,10 +242,10 @@ void OOBTest() {
       EXPECT_DEATH(oob_test<T>(size, i), expected_str);
     }
 
-    for (int i = 0; i < size - sizeof(T) + 1; i++)
+    for (int i = 0; i < (int)(size - sizeof(T) + 1); i++)
       oob_test<T>(size, i);
 
-    for (int i = size - sizeof(T) + 1; i <= size + 3 * sizeof(T); i++) {
+    for (int i = size - sizeof(T) + 1; i <= (int)(size + 2 * sizeof(T)); i++) {
       const char *str =
           "is located.*%d byte.*to the right";
       int off = i >= size ? (i - size) : 0;
@@ -304,8 +301,20 @@ TEST(AddressSanitizer, OOBRightTest) {
   }
 }
 
+#if ASAN_ALLOCATOR_VERSION == 2  // Broken with the asan_allocator1
+TEST(AddressSanitizer, LargeOOBRightTest) {
+  size_t large_power_of_two = 1 << 19;
+  for (size_t i = 16; i <= 256; i *= 2) {
+    size_t size = large_power_of_two - i;
+    char *p = Ident(new char[size]);
+    EXPECT_DEATH(p[size] = 0, "is located 0 bytes to the right");
+    delete [] p;
+  }
+}
+#endif  // ASAN_ALLOCATOR_VERSION == 2
+
 TEST(AddressSanitizer, UAF_char) {
-  const char *uaf_string = "AddressSanitizer.*heap-use-after-free";
+  const char *uaf_string = "AddressSanitizer:.*heap-use-after-free";
   EXPECT_DEATH(uaf_test<U1>(1, 0), uaf_string);
   EXPECT_DEATH(uaf_test<U1>(10, 0), uaf_string);
   EXPECT_DEATH(uaf_test<U1>(10, 10), uaf_string);
@@ -335,7 +344,7 @@ TEST(AddressSanitizer, BitFieldPositiveTest) {
   EXPECT_DEATH(x->bf2 = 0, "use-after-free");
   EXPECT_DEATH(x->bf3 = 0, "use-after-free");
   EXPECT_DEATH(x->bf4 = 0, "use-after-free");
-};
+}
 
 struct StructWithBitFields_8_24 {
   int a:8;
@@ -350,7 +359,7 @@ TEST(AddressSanitizer, BitFieldNegativeTest) {
 }
 
 TEST(AddressSanitizer, OutOfMemoryTest) {
-  size_t size = __WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000);
+  size_t size = SANITIZER_WORDSIZE == 64 ? (size_t)(1ULL << 48) : (0xf0000000);
   EXPECT_EQ(0, realloc(0, size));
   EXPECT_EQ(0, realloc(0, ~Ident(0)));
   EXPECT_EQ(0, malloc(size));
@@ -360,28 +369,61 @@ TEST(AddressSanitizer, OutOfMemoryTest) {
 }
 
 #if ASAN_NEEDS_SEGV
+namespace {
+
+const char kUnknownCrash[] = "AddressSanitizer: SEGV on unknown address";
+const char kOverriddenHandler[] = "ASan signal handler has been overridden\n";
+
 TEST(AddressSanitizer, WildAddressTest) {
   char *c = (char*)0x123;
-  EXPECT_DEATH(*c = 0, "AddressSanitizer crashed on unknown address");
+  EXPECT_DEATH(*c = 0, kUnknownCrash);
+}
+
+void my_sigaction_sighandler(int, siginfo_t*, void*) {
+  fprintf(stderr, kOverriddenHandler);
+  exit(1);
 }
+
+void my_signal_sighandler(int signum) {
+  fprintf(stderr, kOverriddenHandler);
+  exit(1);
+}
+
+TEST(AddressSanitizer, SignalTest) {
+  struct sigaction sigact;
+  memset(&sigact, 0, sizeof(sigact));
+  sigact.sa_sigaction = my_sigaction_sighandler;
+  sigact.sa_flags = SA_SIGINFO;
+  // ASan should silently ignore sigaction()...
+  EXPECT_EQ(0, sigaction(SIGSEGV, &sigact, 0));
+#ifdef __APPLE__
+  EXPECT_EQ(0, sigaction(SIGBUS, &sigact, 0));
+#endif
+  char *c = (char*)0x123;
+  EXPECT_DEATH(*c = 0, kUnknownCrash);
+  // ... and signal().
+  EXPECT_EQ(0, signal(SIGSEGV, my_signal_sighandler));
+  EXPECT_DEATH(*c = 0, kUnknownCrash);
+}
+}  // namespace
 #endif
 
 static void MallocStress(size_t n) {
-  uint32_t seed = my_rand(&global_seed);
+  uint32_t seed = my_rand();
   for (size_t iter = 0; iter < 10; iter++) {
     vector<void *> vec;
     for (size_t i = 0; i < n; i++) {
       if ((i % 3) == 0) {
         if (vec.empty()) continue;
-        size_t idx = my_rand(&seed) % vec.size();
+        size_t idx = my_rand_r(&seed) % vec.size();
         void *ptr = vec[idx];
         vec[idx] = vec.back();
         vec.pop_back();
         free_aaa(ptr);
       } else {
-        size_t size = my_rand(&seed) % 1000 + 1;
+        size_t size = my_rand_r(&seed) % 1000 + 1;
 #ifndef __APPLE__
-        size_t alignment = 1 << (my_rand(&seed) % 7 + 3);
+        size_t alignment = 1 << (my_rand_r(&seed) % 7 + 3);
         char *ptr = (char*)memalign_aaa(alignment, size);
 #else
         char *ptr = (char*) malloc_aaa(size);
@@ -421,24 +463,42 @@ TEST(AddressSanitizer, HugeMallocTest) {
   // 32-bit Mac 10.7 gives even less (< 1G).
   // (the libSystem malloc() allows allocating up to 2300 megabytes without
   // ASan).
-  size_t n_megs = __WORDSIZE == 32 ? 500 : 4100;
+  size_t n_megs = SANITIZER_WORDSIZE == 32 ? 500 : 4100;
 #else
-  size_t n_megs = __WORDSIZE == 32 ? 2600 : 4100;
+  size_t n_megs = SANITIZER_WORDSIZE == 32 ? 2600 : 4100;
 #endif
   TestLargeMalloc(n_megs << 20);
 }
 #endif
 
+#ifndef __APPLE__
+void MemalignRun(size_t align, size_t size, int idx) {
+  char *p = (char *)memalign(align, size);
+  Ident(p)[idx] = 0;
+  free(p);
+}
+
+TEST(AddressSanitizer, memalign) {
+  for (int align = 16; align <= (1 << 23); align *= 2) {
+    size_t size = align * 5;
+    EXPECT_DEATH(MemalignRun(align, size, -1),
+                 "is located 1 bytes to the left");
+    EXPECT_DEATH(MemalignRun(align, size, size + 1),
+                 "is located 1 bytes to the right");
+  }
+}
+#endif
+
 TEST(AddressSanitizer, ThreadedMallocStressTest) {
   const int kNumThreads = 4;
   const int kNumIterations = (ASAN_LOW_MEMORY) ? 10000 : 100000;
   pthread_t t[kNumThreads];
   for (int i = 0; i < kNumThreads; i++) {
-    pthread_create(&t[i], 0, (void* (*)(void *x))MallocStress,
+    PTHREAD_CREATE(&t[i], 0, (void* (*)(void *x))MallocStress,
         (void*)kNumIterations);
   }
   for (int i = 0; i < kNumThreads; i++) {
-    pthread_join(t[i], 0);
+    PTHREAD_JOIN(t[i], 0);
   }
 }
 
@@ -452,13 +512,14 @@ void *ManyThreadsWorker(void *a) {
 }
 
 TEST(AddressSanitizer, ManyThreadsTest) {
-  const size_t kNumThreads = __WORDSIZE == 32 ? 30 : 1000;
+  const size_t kNumThreads =
+      (SANITIZER_WORDSIZE == 32 || ASAN_AVOID_EXPENSIVE_TESTS) ? 30 : 1000;
   pthread_t t[kNumThreads];
   for (size_t i = 0; i < kNumThreads; i++) {
-    pthread_create(&t[i], 0, (void* (*)(void *x))ManyThreadsWorker, (void*)i);
+    PTHREAD_CREATE(&t[i], 0, ManyThreadsWorker, (void*)i);
   }
   for (size_t i = 0; i < kNumThreads; i++) {
-    pthread_join(t[i], 0);
+    PTHREAD_JOIN(t[i], 0);
   }
 }
 
@@ -468,20 +529,20 @@ TEST(AddressSanitizer, ReallocTest) {
   ptr[3] = 3;
   for (int i = 0; i < 10000; i++) {
     ptr = (int*)realloc(ptr,
-        (my_rand(&global_seed) % 1000 + kMinElem) * sizeof(int));
+        (my_rand() % 1000 + kMinElem) * sizeof(int));
     EXPECT_EQ(3, ptr[3]);
   }
 }
 
 #ifndef __APPLE__
 static const char *kMallocUsableSizeErrorMsg =
-  "AddressSanitizer attempting to call malloc_usable_size()";
+  "AddressSanitizer: attempting to call malloc_usable_size()";
 
 TEST(AddressSanitizer, MallocUsableSizeTest) {
   const size_t kArraySize = 100;
   char *array = Ident((char*)malloc(kArraySize));
   int *int_ptr = Ident(new int);
-  EXPECT_EQ(0, malloc_usable_size(NULL));
+  EXPECT_EQ(0U, malloc_usable_size(NULL));
   EXPECT_EQ(kArraySize, malloc_usable_size(array));
   EXPECT_EQ(sizeof(int), malloc_usable_size(int_ptr));
   EXPECT_DEATH(malloc_usable_size((void*)0x123), kMallocUsableSizeErrorMsg);
@@ -501,7 +562,7 @@ void WrongFree() {
 
 TEST(AddressSanitizer, WrongFreeTest) {
   EXPECT_DEATH(WrongFree(),
-               "ERROR: AddressSanitizer attempting free.*not malloc");
+               "ERROR: AddressSanitizer: attempting free.*not malloc");
 }
 
 void DoubleFree() {
@@ -515,7 +576,7 @@ void DoubleFree() {
 
 TEST(AddressSanitizer, DoubleFreeTest) {
   EXPECT_DEATH(DoubleFree(), ASAN_PCRE_DOTALL
-               "ERROR: AddressSanitizer attempting double-free"
+               "ERROR: AddressSanitizer: attempting double-free"
                ".*is located 0 bytes inside of 400-byte region"
                ".*freed by thread T0 here"
                ".*previously allocated by thread T0 here");
@@ -610,6 +671,17 @@ NOINLINE void LongJmpFunc1(jmp_buf buf) {
   longjmp(buf, 1);
 }
 
+NOINLINE void BuiltinLongJmpFunc1(jmp_buf buf) {
+  // create three red zones for these two stack objects.
+  int a;
+  int b;
+
+  int *A = Ident(&a);
+  int *B = Ident(&b);
+  *A = *B;
+  __builtin_longjmp((void**)buf, 1);
+}
+
 NOINLINE void UnderscopeLongJmpFunc1(jmp_buf buf) {
   // create three red zones for these two stack objects.
   int a;
@@ -650,6 +722,17 @@ TEST(AddressSanitizer, LongJmpTest) {
   }
 }
 
+#if not defined(__ANDROID__)
+TEST(AddressSanitizer, BuiltinLongJmpTest) {
+  static jmp_buf buf;
+  if (!__builtin_setjmp((void**)buf)) {
+    BuiltinLongJmpFunc1(buf);
+  } else {
+    TouchStackFunc();
+  }
+}
+#endif  // not defined(__ANDROID__)
+
 TEST(AddressSanitizer, UnderscopeLongJmpTest) {
   static jmp_buf buf;
   if (!_setjmp(buf)) {
@@ -683,7 +766,7 @@ NOINLINE void ThrowFunc() {
 TEST(AddressSanitizer, CxxExceptionTest) {
   if (ASAN_UAR) return;
   // TODO(kcc): this test crashes on 32-bit for some reason...
-  if (__WORDSIZE == 32) return;
+  if (SANITIZER_WORDSIZE == 32) return;
   try {
     ThrowFunc();
   } catch(...) {}
@@ -710,10 +793,10 @@ void *ThreadStackReuseFunc2(void *unused) {
 
 TEST(AddressSanitizer, ThreadStackReuseTest) {
   pthread_t t;
-  pthread_create(&t, 0, ThreadStackReuseFunc1, 0);
-  pthread_join(t, 0);
-  pthread_create(&t, 0, ThreadStackReuseFunc2, 0);
-  pthread_join(t, 0);
+  PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc1, 0);
+  PTHREAD_JOIN(t, 0);
+  PTHREAD_CREATE(&t, 0, ThreadStackReuseFunc2, 0);
+  PTHREAD_JOIN(t, 0);
 }
 
 #if defined(__i386__) || defined(__x86_64__)
@@ -725,7 +808,7 @@ TEST(AddressSanitizer, Store128Test) {
   assert(((uintptr_t)p % 16) == 0);
   __m128i value_wide = _mm_set1_epi16(0x1234);
   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
-               "AddressSanitizer heap-buffer-overflow");
+               "AddressSanitizer: heap-buffer-overflow");
   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
                "WRITE of size 16");
   EXPECT_DEATH(_mm_store_si128((__m128i*)p, value_wide),
@@ -734,14 +817,39 @@ TEST(AddressSanitizer, Store128Test) {
 }
 #endif
 
-static string RightOOBErrorMessage(int oob_distance) {
+static string RightOOBErrorMessage(int oob_distance, bool is_write) {
   assert(oob_distance >= 0);
   char expected_str[100];
-  sprintf(expected_str, "located %d bytes to the right", oob_distance);
+  sprintf(expected_str, ASAN_PCRE_DOTALL "%s.*located %d bytes to the right",
+          is_write ? "WRITE" : "READ", oob_distance);
   return string(expected_str);
 }
 
-static string LeftOOBErrorMessage(int oob_distance) {
+static string RightOOBWriteMessage(int oob_distance) {
+  return RightOOBErrorMessage(oob_distance, /*is_write*/true);
+}
+
+static string RightOOBReadMessage(int oob_distance) {
+  return RightOOBErrorMessage(oob_distance, /*is_write*/false);
+}
+
+static string LeftOOBErrorMessage(int oob_distance, bool is_write) {
+  assert(oob_distance > 0);
+  char expected_str[100];
+  sprintf(expected_str, ASAN_PCRE_DOTALL "%s.*located %d bytes to the left",
+          is_write ? "WRITE" : "READ", oob_distance);
+  return string(expected_str);
+}
+
+static string LeftOOBWriteMessage(int oob_distance) {
+  return LeftOOBErrorMessage(oob_distance, /*is_write*/true);
+}
+
+static string LeftOOBReadMessage(int oob_distance) {
+  return LeftOOBErrorMessage(oob_distance, /*is_write*/false);
+}
+
+static string LeftOOBAccessMessage(int oob_distance) {
   assert(oob_distance > 0);
   char expected_str[100];
   sprintf(expected_str, "located %d bytes to the left", oob_distance);
@@ -755,44 +863,48 @@ void MemSetOOBTestTemplate(size_t length) {
   T *array = Ident((T*)malloc(size));
   int element = Ident(42);
   int zero = Ident(0);
+  void *(*MEMSET)(void *s, int c, size_t n) = Ident(memset);
   // memset interval inside array
-  memset(array, element, size);
-  memset(array, element, size - 1);
-  memset(array + length - 1, element, sizeof(T));
-  memset(array, element, 1);
+  MEMSET(array, element, size);
+  MEMSET(array, element, size - 1);
+  MEMSET(array + length - 1, element, sizeof(T));
+  MEMSET(array, element, 1);
 
   // memset 0 bytes
-  memset(array - 10, element, zero);
-  memset(array - 1, element, zero);
-  memset(array, element, zero);
-  memset(array + length, 0, zero);
-  memset(array + length + 1, 0, zero);
+  MEMSET(array - 10, element, zero);
+  MEMSET(array - 1, element, zero);
+  MEMSET(array, element, zero);
+  MEMSET(array + length, 0, zero);
+  MEMSET(array + length + 1, 0, zero);
 
   // try to memset bytes to the right of array
-  EXPECT_DEATH(memset(array, 0, size + 1),
-               RightOOBErrorMessage(0));
-  EXPECT_DEATH(memset((char*)(array + length) - 1, element, 6),
-               RightOOBErrorMessage(4));
-  EXPECT_DEATH(memset(array + 1, element, size + sizeof(T)),
-               RightOOBErrorMessage(2 * sizeof(T) - 1));
+  EXPECT_DEATH(MEMSET(array, 0, size + 1),
+               RightOOBWriteMessage(0));
+  EXPECT_DEATH(MEMSET((char*)(array + length) - 1, element, 6),
+               RightOOBWriteMessage(0));
+  EXPECT_DEATH(MEMSET(array + 1, element, size + sizeof(T)),
+               RightOOBWriteMessage(0));
   // whole interval is to the right
-  EXPECT_DEATH(memset(array + length + 1, 0, 10),
-               RightOOBErrorMessage(sizeof(T)));
+  EXPECT_DEATH(MEMSET(array + length + 1, 0, 10),
+               RightOOBWriteMessage(sizeof(T)));
 
   // try to memset bytes to the left of array
-  EXPECT_DEATH(memset((char*)array - 1, element, size),
-               LeftOOBErrorMessage(1));
-  EXPECT_DEATH(memset((char*)array - 5, 0, 6),
-               LeftOOBErrorMessage(5));
-  EXPECT_DEATH(memset(array - 5, element, size + 5 * sizeof(T)),
-               LeftOOBErrorMessage(5 * sizeof(T)));
+  EXPECT_DEATH(MEMSET((char*)array - 1, element, size),
+               LeftOOBWriteMessage(1));
+  EXPECT_DEATH(MEMSET((char*)array - 5, 0, 6),
+               LeftOOBWriteMessage(5));
+  if (length >= 100) {
+    // Large OOB, we find it only if the redzone is large enough.
+    EXPECT_DEATH(memset(array - 5, element, size + 5 * sizeof(T)),
+                 LeftOOBWriteMessage(5 * sizeof(T)));
+  }
   // whole interval is to the left
-  EXPECT_DEATH(memset(array - 2, 0, sizeof(T)),
-               LeftOOBErrorMessage(2 * sizeof(T)));
+  EXPECT_DEATH(MEMSET(array - 2, 0, sizeof(T)),
+               LeftOOBWriteMessage(2 * sizeof(T)));
 
   // try to memset bytes both to the left & to the right
-  EXPECT_DEATH(memset((char*)array - 2, element, size + 4),
-               LeftOOBErrorMessage(2));
+  EXPECT_DEATH(MEMSET((char*)array - 2, element, size + 4),
+               LeftOOBWriteMessage(2));
 
   free(array);
 }
@@ -804,6 +916,51 @@ TEST(AddressSanitizer, MemSetOOBTest) {
   // We can test arrays of structres/classes here, but what for?
 }
 
+// Try to allocate two arrays of 'size' bytes that are near each other.
+// Strictly speaking we are not guaranteed to find such two pointers,
+// but given the structure of asan's allocator we will.
+static bool AllocateTwoAdjacentArrays(char **x1, char **x2, size_t size) {
+  vector<char *> v;
+  bool res = false;
+  for (size_t i = 0; i < 1000U && !res; i++) {
+    v.push_back(new char[size]);
+    if (i == 0) continue;
+    sort(v.begin(), v.end());
+    for (size_t j = 1; j < v.size(); j++) {
+      assert(v[j] > v[j-1]);
+      if ((size_t)(v[j] - v[j-1]) < size * 2) {
+        *x2 = v[j];
+        *x1 = v[j-1];
+        res = true;
+        break;
+      }
+    }
+  }
+
+  for (size_t i = 0; i < v.size(); i++) {
+    if (res && v[i] == *x1) continue;
+    if (res && v[i] == *x2) continue;
+    delete [] v[i];
+  }
+  return res;
+}
+
+TEST(AddressSanitizer, LargeOOBInMemset) {
+  for (size_t size = 200; size < 100000; size += size / 2) {
+    char *x1, *x2;
+    if (!Ident(AllocateTwoAdjacentArrays)(&x1, &x2, size))
+      continue;
+    // fprintf(stderr, "  large oob memset: %p %p %zd\n", x1, x2, size);
+    // Do a memset on x1 with huge out-of-bound access that will end up in x2.
+    EXPECT_DEATH(Ident(memset)(x1, 0, size * 2),
+                 "is located 0 bytes to the right");
+    delete [] x1;
+    delete [] x2;
+    return;
+  }
+  assert(0 && "Did not find two adjacent malloc-ed pointers");
+}
+
 // Same test for memcpy and memmove functions
 template <typename T, class M>
 void MemTransferOOBTestTemplate(size_t length) {
@@ -827,27 +984,27 @@ void MemTransferOOBTestTemplate(size_t length) {
 
   // try to change mem to the right of dest
   EXPECT_DEATH(M::transfer(dest + 1, src, size),
-               RightOOBErrorMessage(sizeof(T) - 1));
+               RightOOBWriteMessage(0));
   EXPECT_DEATH(M::transfer((char*)(dest + length) - 1, src, 5),
-               RightOOBErrorMessage(3));
+               RightOOBWriteMessage(0));
 
   // try to change mem to the left of dest
   EXPECT_DEATH(M::transfer(dest - 2, src, size),
-               LeftOOBErrorMessage(2 * sizeof(T)));
+               LeftOOBWriteMessage(2 * sizeof(T)));
   EXPECT_DEATH(M::transfer((char*)dest - 3, src, 4),
-               LeftOOBErrorMessage(3));
+               LeftOOBWriteMessage(3));
 
   // try to access mem to the right of src
   EXPECT_DEATH(M::transfer(dest, src + 2, size),
-               RightOOBErrorMessage(2 * sizeof(T) - 1));
+               RightOOBReadMessage(0));
   EXPECT_DEATH(M::transfer(dest, (char*)(src + length) - 3, 6),
-               RightOOBErrorMessage(2));
+               RightOOBReadMessage(0));
 
   // try to access mem to the left of src
   EXPECT_DEATH(M::transfer(dest, src - 1, size),
-               LeftOOBErrorMessage(sizeof(T)));
+               LeftOOBReadMessage(sizeof(T)));
   EXPECT_DEATH(M::transfer(dest, (char*)src - 6, 7),
-               LeftOOBErrorMessage(6));
+               LeftOOBReadMessage(6));
 
   // Generally we don't need to test cases where both accessing src and writing
   // to dest address to poisoned memory.
@@ -856,10 +1013,10 @@ void MemTransferOOBTestTemplate(size_t length) {
   T *big_dest = Ident((T*)malloc(size * 2));
   // try to change mem to both sides of dest
   EXPECT_DEATH(M::transfer(dest - 1, big_src, size * 2),
-               LeftOOBErrorMessage(sizeof(T)));
+               LeftOOBWriteMessage(sizeof(T)));
   // try to access mem to both sides of src
   EXPECT_DEATH(M::transfer(big_dest, src - 2, size * 2),
-               LeftOOBErrorMessage(2 * sizeof(T)));
+               LeftOOBReadMessage(2 * sizeof(T)));
 
   free(src);
   free(dest);
@@ -870,7 +1027,7 @@ void MemTransferOOBTestTemplate(size_t length) {
 class MemCpyWrapper {
  public:
   static void* transfer(void *to, const void *from, size_t size) {
-    return memcpy(to, from, size);
+    return Ident(memcpy)(to, from, size);
   }
 };
 TEST(AddressSanitizer, MemCpyOOBTest) {
@@ -881,7 +1038,7 @@ TEST(AddressSanitizer, MemCpyOOBTest) {
 class MemMoveWrapper {
  public:
   static void* transfer(void *to, const void *from, size_t size) {
-    return memmove(to, from, size);
+    return Ident(memmove)(to, from, size);
   }
 };
 TEST(AddressSanitizer, MemMoveOOBTest) {
@@ -902,21 +1059,21 @@ void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) {
   // Normal strlen calls
   EXPECT_EQ(strlen(str), length);
   if (length > 0) {
-    EXPECT_EQ(strlen(str + 1), length - 1);
-    EXPECT_EQ(strlen(str + length), 0);
+    EXPECT_EQ(length - 1, strlen(str + 1));
+    EXPECT_EQ(0U, strlen(str + length));
   }
   // Arg of strlen is not malloced, OOB access
   if (!is_global) {
     // We don't insert RedZones to the left of global variables
-    EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBErrorMessage(1));
-    EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBErrorMessage(5));
+    EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBReadMessage(1));
+    EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBReadMessage(5));
   }
-  EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBReadMessage(0));
   // Overwrite terminator
   str[length] = 'a';
   // String is not zero-terminated, strlen will lead to OOB access
-  EXPECT_DEATH(Ident(strlen(str)), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(strlen(str + length)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strlen(str)), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(strlen(str + length)), RightOOBReadMessage(0));
   // Restore terminator
   str[length] = 0;
 }
@@ -925,7 +1082,8 @@ TEST(AddressSanitizer, StrLenOOBTest) {
   size_t length = Ident(10);
   char *heap_string = Ident((char*)malloc(length + 1));
   char stack_string[10 + 1];
-  for (int i = 0; i < length; i++) {
+  break_optimization(&stack_string);
+  for (size_t i = 0; i < length; i++) {
     heap_string[i] = 'a';
     stack_string[i] = 'b';
   }
@@ -959,11 +1117,11 @@ TEST(AddressSanitizer, StrNLenOOBTest) {
   str[size - 1] = '\0';
   Ident(strnlen(str, 2 * size));
   // Argument points to not allocated memory.
-  EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBReadMessage(0));
   // Overwrite the terminating '\0' and hit unallocated memory.
   str[size - 1] = 'z';
-  EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBReadMessage(0));
   free(str);
 }
 #endif
@@ -979,11 +1137,11 @@ TEST(AddressSanitizer, StrDupOOBTest) {
   new_str = strdup(str + size - 1);
   free(new_str);
   // Argument points to not allocated memory.
-  EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(strdup(str + size)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(strdup(str + size)), RightOOBReadMessage(0));
   // Overwrite the terminating '\0' and hit unallocated memory.
   str[size - 1] = 'z';
-  EXPECT_DEATH(Ident(strdup(str)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strdup(str)), RightOOBReadMessage(0));
   free(str);
 }
 
@@ -997,15 +1155,15 @@ TEST(AddressSanitizer, StrCpyOOBTest) {
   strcpy(to, from);
   strcpy(to + to_size - from_size, from);
   // Length of "from" is too small.
-  EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBWriteMessage(0));
   // "to" or "from" points to not allocated memory.
-  EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBWriteMessage(1));
+  EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBWriteMessage(0));
   // Overwrite the terminating '\0' character and hit unallocated memory.
   from[from_size - 1] = '!';
-  EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBReadMessage(0));
   free(to);
   free(from);
 }
@@ -1027,31 +1185,37 @@ TEST(AddressSanitizer, StrNCpyOOBTest) {
   strncpy(to + to_size - 1, from, 1);
   // One of {to, from} points to not allocated memory
   EXPECT_DEATH(Ident(strncpy(to, from - 1, from_size)),
-               LeftOOBErrorMessage(1));
+               LeftOOBReadMessage(1));
   EXPECT_DEATH(Ident(strncpy(to - 1, from, from_size)),
-               LeftOOBErrorMessage(1));
+               LeftOOBWriteMessage(1));
   EXPECT_DEATH(Ident(strncpy(to, from + from_size, 1)),
-               RightOOBErrorMessage(0));
+               RightOOBReadMessage(0));
   EXPECT_DEATH(Ident(strncpy(to + to_size, from, 1)),
-               RightOOBErrorMessage(0));
+               RightOOBWriteMessage(0));
   // Length of "to" is too small
   EXPECT_DEATH(Ident(strncpy(to + to_size - from_size + 1, from, from_size)),
-               RightOOBErrorMessage(0));
+               RightOOBWriteMessage(0));
   EXPECT_DEATH(Ident(strncpy(to + 1, from, to_size)),
-               RightOOBErrorMessage(0));
+               RightOOBWriteMessage(0));
   // Overwrite terminator in from
   from[from_size - 1] = '!';
   // normal strncpy call
   strncpy(to, from, from_size);
   // Length of "from" is too small
   EXPECT_DEATH(Ident(strncpy(to, from, to_size)),
-               RightOOBErrorMessage(0));
+               RightOOBReadMessage(0));
   free(to);
   free(from);
 }
 
-typedef char*(*PointerToStrChr)(const char*, int);
-void RunStrChrTest(PointerToStrChr StrChr) {
+// Users may have different definitions of "strchr" and "index", so provide
+// function pointer typedefs and overload RunStrChrTest implementation.
+// We can't use macro for RunStrChrTest body here, as this macro would
+// confuse EXPECT_DEATH gtest macro.
+typedef char*(*PointerToStrChr1)(const char*, int);
+typedef char*(*PointerToStrChr2)(char*, int);
+
+USED static void RunStrChrTest(PointerToStrChr1 StrChr) {
   size_t size = Ident(100);
   char *str = MallocAndMemsetString(size);
   str[10] = 'q';
@@ -1060,13 +1224,30 @@ void RunStrChrTest(PointerToStrChr StrChr) {
   EXPECT_EQ(str + 10, StrChr(str, 'q'));
   EXPECT_EQ(NULL, StrChr(str, 'a'));
   // StrChr argument points to not allocated memory.
-  EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBReadMessage(0));
   // Overwrite the terminator and hit not allocated memory.
   str[11] = 'z';
-  EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBReadMessage(0));
   free(str);
 }
+USED static void RunStrChrTest(PointerToStrChr2 StrChr) {
+  size_t size = Ident(100);
+  char *str = MallocAndMemsetString(size);
+  str[10] = 'q';
+  str[11] = '\0';
+  EXPECT_EQ(str, StrChr(str, 'z'));
+  EXPECT_EQ(str + 10, StrChr(str, 'q'));
+  EXPECT_EQ(NULL, StrChr(str, 'a'));
+  // StrChr argument points to not allocated memory.
+  EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBReadMessage(0));
+  // Overwrite the terminator and hit not allocated memory.
+  str[11] = 'z';
+  EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBReadMessage(0));
+  free(str);
+}
+
 TEST(AddressSanitizer, StrChrAndIndexOOBTest) {
   RunStrChrTest(&strchr);
   RunStrChrTest(&index);
@@ -1124,8 +1305,9 @@ TEST(AddressSanitizer, StrCmpAndFriendsLogicTest) {
 typedef int(*PointerToStrCmp)(const char*, const char*);
 void RunStrCmpTest(PointerToStrCmp StrCmp) {
   size_t size = Ident(100);
-  char *s1 = MallocAndMemsetString(size);
-  char *s2 = MallocAndMemsetString(size);
+  int fill = 'o';
+  char *s1 = MallocAndMemsetString(size, fill);
+  char *s2 = MallocAndMemsetString(size, fill);
   s1[size - 1] = '\0';
   s2[size - 1] = '\0';
   // Normal StrCmp calls
@@ -1136,14 +1318,14 @@ void RunStrCmpTest(PointerToStrCmp StrCmp) {
   s2[size - 1] = 'x';
   Ident(StrCmp(s1, s2));
   // One of arguments points to not allocated memory.
-  EXPECT_DEATH(Ident(StrCmp)(s1 - 1, s2), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(StrCmp)(s1, s2 - 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(StrCmp)(s1 + size, s2), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(StrCmp)(s1, s2 + size), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(StrCmp)(s1 - 1, s2), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrCmp)(s1, s2 - 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrCmp)(s1 + size, s2), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(StrCmp)(s1, s2 + size), RightOOBReadMessage(0));
   // Hit unallocated memory and die.
-  s2[size - 1] = 'z';
-  EXPECT_DEATH(Ident(StrCmp)(s1, s1), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(StrCmp)(s1 + size - 1, s2), RightOOBErrorMessage(0));
+  s1[size - 1] = fill;
+  EXPECT_DEATH(Ident(StrCmp)(s1, s1), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(StrCmp)(s1 + size - 1, s2), RightOOBReadMessage(0));
   free(s1);
   free(s2);
 }
@@ -1172,13 +1354,13 @@ void RunStrNCmpTest(PointerToStrNCmp StrNCmp) {
   Ident(StrNCmp(s1 - 1, s2 - 1, 0));
   Ident(StrNCmp(s1 + size - 1, s2 + size - 1, 1));
   // One of arguments points to not allocated memory.
-  EXPECT_DEATH(Ident(StrNCmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(StrNCmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(StrNCmp)(s1 + size, s2, 1), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(StrNCmp)(s1, s2 + size, 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(StrNCmp)(s1 - 1, s2, 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrNCmp)(s1, s2 - 1, 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(StrNCmp)(s1 + size, s2, 1), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(StrNCmp)(s1, s2 + size, 1), RightOOBReadMessage(0));
   // Hit unallocated memory and die.
-  EXPECT_DEATH(Ident(StrNCmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(StrNCmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(StrNCmp)(s1 + 1, s2 + 1, size), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(StrNCmp)(s1 + size - 1, s2, 2), RightOOBReadMessage(0));
   free(s1);
   free(s2);
 }
@@ -1200,22 +1382,23 @@ TEST(AddressSanitizer, MemCmpOOBTest) {
   Ident(memcmp(s1 + size - 1, s2 + size - 1, 1));
   Ident(memcmp(s1 - 1, s2 - 1, 0));
   // One of arguments points to not allocated memory.
-  EXPECT_DEATH(Ident(memcmp)(s1 - 1, s2, 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(memcmp)(s1, s2 - 1, 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(Ident(memcmp)(s1 + size, s2, 1), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(memcmp)(s1, s2 + size, 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(memcmp)(s1 - 1, s2, 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(memcmp)(s1, s2 - 1, 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(Ident(memcmp)(s1 + size, s2, 1), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(memcmp)(s1, s2 + size, 1), RightOOBReadMessage(0));
   // Hit unallocated memory and die.
-  EXPECT_DEATH(Ident(memcmp)(s1 + 1, s2 + 1, size), RightOOBErrorMessage(0));
-  EXPECT_DEATH(Ident(memcmp)(s1 + size - 1, s2, 2), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(memcmp)(s1 + 1, s2 + 1, size), RightOOBReadMessage(0));
+  EXPECT_DEATH(Ident(memcmp)(s1 + size - 1, s2, 2), RightOOBReadMessage(0));
   // Zero bytes are not terminators and don't prevent from OOB.
   s1[size - 1] = '\0';
   s2[size - 1] = '\0';
-  EXPECT_DEATH(Ident(memcmp)(s1, s2, size + 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(Ident(memcmp)(s1, s2, size + 1), RightOOBReadMessage(0));
   free(s1);
   free(s2);
 }
 
 TEST(AddressSanitizer, StrCatOOBTest) {
+  // strcat() reads strlen(to) bytes from |to| before concatenating.
   size_t to_size = Ident(100);
   char *to = MallocAndMemsetString(to_size);
   to[0] = '\0';
@@ -1226,24 +1409,25 @@ TEST(AddressSanitizer, StrCatOOBTest) {
   strcat(to, from);
   strcat(to, from);
   strcat(to + from_size, from + from_size - 2);
-  // Catenate empty string is not always an error.
-  strcat(to - 1, from + from_size - 1);
+  // Passing an invalid pointer is an error even when concatenating an empty
+  // string.
+  EXPECT_DEATH(strcat(to - 1, from + from_size - 1), LeftOOBAccessMessage(1));
   // One of arguments points to not allocated memory.
-  EXPECT_DEATH(strcat(to - 1, from), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(strcat(to, from - 1), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(strcat(to + to_size, from), RightOOBErrorMessage(0));
-  EXPECT_DEATH(strcat(to, from + from_size), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strcat(to - 1, from), LeftOOBAccessMessage(1));
+  EXPECT_DEATH(strcat(to, from - 1), LeftOOBReadMessage(1));
+  EXPECT_DEATH(strcat(to + to_size, from), RightOOBWriteMessage(0));
+  EXPECT_DEATH(strcat(to, from + from_size), RightOOBReadMessage(0));
 
   // "from" is not zero-terminated.
   from[from_size - 1] = 'z';
-  EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strcat(to, from), RightOOBReadMessage(0));
   from[from_size - 1] = '\0';
   // "to" is not zero-terminated.
   memset(to, 'z', to_size);
-  EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strcat(to, from), RightOOBWriteMessage(0));
   // "to" is too short to fit "from".
   to[to_size - from_size + 1] = '\0';
-  EXPECT_DEATH(strcat(to, from), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strcat(to, from), RightOOBWriteMessage(0));
   // length of "to" is just enough.
   strcat(to, from + 1);
 
@@ -1252,6 +1436,7 @@ TEST(AddressSanitizer, StrCatOOBTest) {
 }
 
 TEST(AddressSanitizer, StrNCatOOBTest) {
+  // strncat() reads strlen(to) bytes from |to| before concatenating.
   size_t to_size = Ident(100);
   char *to = MallocAndMemsetString(to_size);
   to[0] = '\0';
@@ -1262,26 +1447,26 @@ TEST(AddressSanitizer, StrNCatOOBTest) {
   strncat(to, from, from_size);
   from[from_size - 1] = '\0';
   strncat(to, from, 2 * from_size);
-  // Catenating empty string is not an error.
-  strncat(to - 1, from, 0);
+  // Catenating empty string with an invalid string is still an error.
+  EXPECT_DEATH(strncat(to - 1, from, 0), LeftOOBAccessMessage(1));
   strncat(to, from + from_size - 1, 10);
   // One of arguments points to not allocated memory.
-  EXPECT_DEATH(strncat(to - 1, from, 2), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(strncat(to, from - 1, 2), LeftOOBErrorMessage(1));
-  EXPECT_DEATH(strncat(to + to_size, from, 2), RightOOBErrorMessage(0));
-  EXPECT_DEATH(strncat(to, from + from_size, 2), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strncat(to - 1, from, 2), LeftOOBAccessMessage(1));
+  EXPECT_DEATH(strncat(to, from - 1, 2), LeftOOBReadMessage(1));
+  EXPECT_DEATH(strncat(to + to_size, from, 2), RightOOBWriteMessage(0));
+  EXPECT_DEATH(strncat(to, from + from_size, 2), RightOOBReadMessage(0));
 
   memset(from, 'z', from_size);
   memset(to, 'z', to_size);
   to[0] = '\0';
   // "from" is too short.
-  EXPECT_DEATH(strncat(to, from, from_size + 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strncat(to, from, from_size + 1), RightOOBReadMessage(0));
   // "to" is not zero-terminated.
-  EXPECT_DEATH(strncat(to + 1, from, 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strncat(to + 1, from, 1), RightOOBWriteMessage(0));
   // "to" is too short to fit "from".
   to[0] = 'z';
   to[to_size - from_size + 1] = '\0';
-  EXPECT_DEATH(strncat(to, from, from_size - 1), RightOOBErrorMessage(0));
+  EXPECT_DEATH(strncat(to, from, from_size - 1), RightOOBWriteMessage(0));
   // "to" is just enough.
   strncat(to, from, from_size - 2);
 
@@ -1336,7 +1521,7 @@ TEST(AddressSanitizer, StrArgsOverlapTest) {
   str[10] = '\0';
   str[20] = '\0';
   strcat(str, str + 10);
-  strcat(str, str + 11);
+  EXPECT_DEATH(strcat(str, str + 11), OverlapErrorMessage("strcat"));
   str[10] = '\0';
   strcat(str + 11, str);
   EXPECT_DEATH(strcat(str, str + 9), OverlapErrorMessage("strcat"));
@@ -1347,7 +1532,7 @@ TEST(AddressSanitizer, StrArgsOverlapTest) {
   memset(str, 'z', size);
   str[10] = '\0';
   strncat(str, str + 10, 10);  // from is empty
-  strnca