1 files changed, 202 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh
new file mode 100755
index 000000000000..b4702339db59
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh
@@ -0,0 +1,202 @@
+#!/usr/bin/env bash
+#
+# Run as: CLANG=bin/clang build_symbolizer.sh out.o
+# If you want to use a local copy of zlib, set ZLIB_SRC.
+# zlib can be downloaded from http://www.zlib.net.
+#
+# Script compiles self-contained object file with symbolization code.
+#
+# Symbols exported by the object file will be used by Sanitizer runtime
+# libraries to symbolize code/data in-process.
+#
+# FIXME: We should really be using a simpler approach to building this object
+# file, and it should be available as a regular cmake rule. Conceptually, we
+# want to be doing "ld -r" followed by "objcopy -G" to create a relocatable
+# object file with only our entry points exposed. However, this does not work at
+# present, see https://github.com/llvm/llvm-project/issues/30098.
+
+set -x
+set -e
+set -u
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+SRC_DIR=$(readlink -f $SCRIPT_DIR/..)
+
+if [[ $# -ne 1 ]]; then
+  echo "Missing output file"
+  exit 1
+fi
+
+OUTPUT=$(readlink -f $1)
+COMPILER_RT_SRC=$(readlink -f ${SCRIPT_DIR}/../../../..)
+LLVM_SRC=${LLVM_SRC:-${COMPILER_RT_SRC}/../llvm}
+LLVM_SRC=$(readlink -f $LLVM_SRC)
+
+CLANG="${CLANG:-`which clang`}"
+CLANG_DIR=$(readlink -f $(dirname "$CLANG"))
+
+CC=$CLANG_DIR/clang
+CXX=$CLANG_DIR/clang++
+TBLGEN=$CLANG_DIR/llvm-tblgen
+OPT=$CLANG_DIR/opt
+AR=$CLANG_DIR/llvm-ar
+LINK=$CLANG_DIR/llvm-link
+
+for F in $CC $CXX $TBLGEN $LINK $OPT $AR; do
+  if [[ ! -x "$F" ]]; then
+    echo "Missing $F"
+     exit 1
+  fi
+done
+
+BUILD_DIR=${PWD}/symbolizer
+mkdir -p $BUILD_DIR
+cd $BUILD_DIR
+
+ZLIB_BUILD=${BUILD_DIR}/zlib
+LIBCXX_BUILD=${BUILD_DIR}/libcxx
+LLVM_BUILD=${BUILD_DIR}/llvm
+SYMBOLIZER_BUILD=${BUILD_DIR}/symbolizer
+
+FLAGS=${FLAGS:-}
+ZLIB_SRC=${ZLIB_SRC:-}
+TARGET_TRIPLE=$($CC -print-target-triple $FLAGS)
+if [[ "$FLAGS" =~ "-m32" ]] ; then
+  # Avoid new wrappers.
+  FLAGS+=" -U_FILE_OFFSET_BITS"
+fi
+FLAGS+=" -fPIC -flto -Oz -g0 -DNDEBUG -target $TARGET_TRIPLE -Wno-unused-command-line-argument"
+FLAGS+=" -include ${SRC_DIR}/../sanitizer_redefine_builtins.h -DSANITIZER_COMMON_REDEFINE_BUILTINS_IN_STD -Wno-language-extension-token"
+
+LINKFLAGS="-fuse-ld=lld -target $TARGET_TRIPLE"
+
+# Build zlib.
+if [[ ! -d ${ZLIB_BUILD} ]]; then
+  if [[ -z "${ZLIB_SRC}" ]]; then
+    git clone https://github.com/madler/zlib ${ZLIB_BUILD}
+  else
+    ZLIB_SRC=$(readlink -f $ZLIB_SRC)
+    mkdir -p ${ZLIB_BUILD}
+    cp -r ${ZLIB_SRC}/* ${ZLIB_BUILD}/
+  fi
+fi
+
+cd ${ZLIB_BUILD}
+AR="${AR}" CC="${CC}" CFLAGS="$FLAGS -Wno-deprecated-non-prototype" RANLIB=/bin/true ./configure --static
+make -j libz.a
+
+# Build and install libcxxabi and libcxx.
+if [[ ! -f ${LLVM_BUILD}/build.ninja ]]; then
+  rm -rf ${LIBCXX_BUILD}
+  mkdir -p ${LIBCXX_BUILD}
+  cd ${LIBCXX_BUILD}
+  LIBCXX_FLAGS="${FLAGS} -Wno-macro-redefined"
+  cmake -GNinja \
+    -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_C_COMPILER_WORKS=ON \
+    -DCMAKE_CXX_COMPILER_WORKS=ON \
+    -DCMAKE_C_COMPILER=$CC \
+    -DCMAKE_CXX_COMPILER=$CXX \
+    -DLIBCXX_ABI_NAMESPACE=__InternalSymbolizer \
+    '-DLIBCXX_EXTRA_SITE_DEFINES=_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS;_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS' \
+    -DCMAKE_C_FLAGS_RELEASE="${LIBCXX_FLAGS}" \
+    -DCMAKE_CXX_FLAGS_RELEASE="${LIBCXX_FLAGS}" \
+    -DLIBCXXABI_ENABLE_ASSERTIONS=OFF \
+    -DLIBCXXABI_ENABLE_EXCEPTIONS=OFF \
+    -DLIBCXXABI_USE_LLVM_UNWINDER=OFF \
+    -DLIBCXX_ENABLE_ASSERTIONS=OFF \
+    -DLIBCXX_ENABLE_EXCEPTIONS=OFF \
+    -DLIBCXX_ENABLE_RTTI=OFF \
+    -DCMAKE_SHARED_LINKER_FLAGS="$LINKFLAGS" \
+    -DLIBCXX_ENABLE_SHARED=OFF \
+    -DLIBCXXABI_ENABLE_SHARED=OFF \
+  $LLVM_SRC/../runtimes
+fi
+cd ${LIBCXX_BUILD}
+ninja cxx cxxabi
+
+FLAGS="${FLAGS} -fno-rtti -fno-exceptions"
+LLVM_CFLAGS="${FLAGS} -Wno-global-constructors"
+LLVM_CXXFLAGS="${LLVM_CFLAGS} -nostdinc++ -I${ZLIB_BUILD} -isystem ${LIBCXX_BUILD}/include -isystem ${LIBCXX_BUILD}/include/c++/v1"
+
+# Build LLVM.
+if [[ ! -f ${LLVM_BUILD}/build.ninja ]]; then
+  rm -rf ${LLVM_BUILD}
+  mkdir -p ${LLVM_BUILD}
+  cd ${LLVM_BUILD}
+  cmake -GNinja \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_C_COMPILER_WORKS=ON \
+    -DCMAKE_CXX_COMPILER_WORKS=ON \
+    -DCMAKE_C_COMPILER=$CC \
+    -DCMAKE_CXX_COMPILER=$CXX \
+    -DLLVM_ENABLE_LIBCXX=ON \
+    -DCMAKE_C_FLAGS_RELEASE="${LLVM_CFLAGS}" \
+    -DCMAKE_CXX_FLAGS_RELEASE="${LLVM_CXXFLAGS}" \
+    -DCMAKE_EXE_LINKER_FLAGS="$LINKFLAGS -stdlib=libc++ -L${LIBCXX_BUILD}/lib" \
+    -DLLVM_TABLEGEN=$TBLGEN \
+    -DLLVM_INCLUDE_TESTS=OFF \
+    -DLLVM_ENABLE_ZLIB=ON \
+    -DLLVM_ENABLE_ZSTD=OFF \
+    -DLLVM_ENABLE_THREADS=OFF \
+  $LLVM_SRC
+fi
+cd ${LLVM_BUILD}
+ninja LLVMSymbolize LLVMObject LLVMBinaryFormat LLVMDebugInfoDWARF LLVMSupport LLVMDebugInfoPDB LLVMDebuginfod LLVMMC LLVMDemangle LLVMTextAPI LLVMTargetParser LLVMCore
+
+cd ${BUILD_DIR}
+rm -rf ${SYMBOLIZER_BUILD}
+mkdir ${SYMBOLIZER_BUILD}
+cd ${SYMBOLIZER_BUILD}
+
+echo "Compiling..."
+SYMBOLIZER_FLAGS="$LLVM_CXXFLAGS -I${LLVM_SRC}/include -I${LLVM_BUILD}/include -std=c++17"
+$CXX $SYMBOLIZER_FLAGS ${SRC_DIR}/sanitizer_symbolize.cpp ${SRC_DIR}/sanitizer_wrappers.cpp -c
+$AR rc symbolizer.a sanitizer_symbolize.o sanitizer_wrappers.o
+
+SYMBOLIZER_API_LIST=__sanitizer_symbolize_code
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_data
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_frame
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_flush
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_demangle
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_set_demangle
+SYMBOLIZER_API_LIST+=,__sanitizer_symbolize_set_inline_frames
+
+LIBCXX_ARCHIVE_DIR=$(dirname $(find $LIBCXX_BUILD -name libc++.a | head -n1))
+
+# Merge all the object files together and copy the resulting library back.
+$LINK $LIBCXX_ARCHIVE_DIR/libc++.a \
+      $LIBCXX_ARCHIVE_DIR/libc++abi.a \
+      $LLVM_BUILD/lib/libLLVMSymbolize.a \
+      $LLVM_BUILD/lib/libLLVMObject.a \
+      $LLVM_BUILD/lib/libLLVMBinaryFormat.a \
+      $LLVM_BUILD/lib/libLLVMDebugInfoDWARF.a \
+      $LLVM_BUILD/lib/libLLVMSupport.a \
+      $LLVM_BUILD/lib/libLLVMDebugInfoPDB.a \
+      $LLVM_BUILD/lib/libLLVMDebugInfoMSF.a \
+      $LLVM_BUILD/lib/libLLVMDebugInfoCodeView.a \
+      $LLVM_BUILD/lib/libLLVMDebuginfod.a \
+      $LLVM_BUILD/lib/libLLVMDemangle.a \
+      $LLVM_BUILD/lib/libLLVMMC.a \
+      $LLVM_BUILD/lib/libLLVMTextAPI.a \
+      $LLVM_BUILD/lib/libLLVMTargetParser.a \
+      $LLVM_BUILD/lib/libLLVMCore.a \
+      $ZLIB_BUILD/libz.a \
+      symbolizer.a \
+      -ignore-non-bitcode -o all.bc
+
+echo "Optimizing..."
+$OPT -passes=internalize -internalize-public-api-list=${SYMBOLIZER_API_LIST} all.bc -o opt.bc
+$CC $FLAGS -fno-lto -c opt.bc -o symbolizer.o
+
+echo "Checking undefined symbols..."
+export LC_ALL=C
+nm -f posix -g symbolizer.o | cut -f 1,2 -d \  | sort -u > undefined.new
+grep -Ev "^#|^$" $SCRIPT_DIR/global_symbols.txt | sort -u > expected.new
+(diff -u expected.new undefined.new | grep -E "^\+[^+]") && \
+  (echo "Failed: unexpected symbols"; exit 1)
+
+cp -f symbolizer.o $OUTPUT
+
+echo "Success!"