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-rw-r--r--contrib/compiler-rt/lib/asan/asan_win.cc168
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diff --git a/contrib/compiler-rt/lib/asan/asan_win.cc b/contrib/compiler-rt/lib/asan/asan_win.cc
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+//===-- asan_win.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.
+//
+// Windows-specific details.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_common/sanitizer_platform.h"
+#if SANITIZER_WINDOWS
+#include <windows.h>
+
+#include <dbghelp.h>
+#include <stdlib.h>
+
+#include "asan_interceptors.h"
+#include "asan_internal.h"
+#include "asan_report.h"
+#include "asan_thread.h"
+#include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_mutex.h"
+
+extern "C" {
+ SANITIZER_INTERFACE_ATTRIBUTE
+ int __asan_should_detect_stack_use_after_return() {
+ __asan_init();
+ return __asan_option_detect_stack_use_after_return;
+ }
+}
+
+namespace __asan {
+
+// ---------------------- TSD ---------------- {{{1
+static bool tsd_key_inited = false;
+
+static __declspec(thread) void *fake_tsd = 0;
+
+void AsanTSDInit(void (*destructor)(void *tsd)) {
+ // FIXME: we're ignoring the destructor for now.
+ tsd_key_inited = true;
+}
+
+void *AsanTSDGet() {
+ CHECK(tsd_key_inited);
+ return fake_tsd;
+}
+
+void AsanTSDSet(void *tsd) {
+ CHECK(tsd_key_inited);
+ fake_tsd = tsd;
+}
+
+void PlatformTSDDtor(void *tsd) {
+ AsanThread::TSDDtor(tsd);
+}
+// ---------------------- Various stuff ---------------- {{{1
+void DisableReexec() {
+ // No need to re-exec on Windows.
+}
+
+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
+#endif
+ return 0;
+}
+
+void AsanCheckDynamicRTPrereqs() {}
+
+void AsanCheckIncompatibleRT() {}
+
+void AsanPlatformThreadInit() {
+ // Nothing here for now.
+}
+
+void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
+ UNIMPLEMENTED();
+}
+
+void AsanOnSIGSEGV(int, void *siginfo, void *context) {
+ UNIMPLEMENTED();
+}
+
+static LPTOP_LEVEL_EXCEPTION_FILTER default_seh_handler;
+
+SignalContext SignalContext::Create(void *siginfo, void *context) {
+ EXCEPTION_RECORD *exception_record = (EXCEPTION_RECORD*)siginfo;
+ CONTEXT *context_record = (CONTEXT*)context;
+
+ uptr pc = (uptr)exception_record->ExceptionAddress;
+#ifdef _WIN64
+ uptr bp = (uptr)context_record->Rbp;
+ uptr sp = (uptr)context_record->Rsp;
+#else
+ uptr bp = (uptr)context_record->Ebp;
+ uptr sp = (uptr)context_record->Esp;
+#endif
+ uptr access_addr = exception_record->ExceptionInformation[1];
+
+ return SignalContext(context, access_addr, pc, sp, bp);
+}
+
+static long WINAPI SEHHandler(EXCEPTION_POINTERS *info) {
+ EXCEPTION_RECORD *exception_record = info->ExceptionRecord;
+ CONTEXT *context = info->ContextRecord;
+
+ if (exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION ||
+ exception_record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR) {
+ const char *description =
+ (exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
+ ? "access-violation"
+ : "in-page-error";
+ SignalContext sig = SignalContext::Create(exception_record, context);
+ ReportSIGSEGV(description, sig);
+ }
+
+ // FIXME: Handle EXCEPTION_STACK_OVERFLOW here.
+
+ return default_seh_handler(info);
+}
+
+// We want to install our own exception handler (EH) to print helpful reports
+// on access violations and whatnot. Unfortunately, the CRT initializers assume
+// they are run before any user code and drop any previously-installed EHs on
+// the floor, so we can't install our handler inside __asan_init.
+// (See crt0dat.c in the CRT sources for the details)
+//
+// Things get even more complicated with the dynamic runtime, as it finishes its
+// initialization before the .exe module CRT begins to initialize.
+//
+// For the static runtime (-MT), it's enough to put a callback to
+// __asan_set_seh_filter in the last section for C initializers.
+//
+// For the dynamic runtime (-MD), we want link the same
+// asan_dynamic_runtime_thunk.lib to all the modules, thus __asan_set_seh_filter
+// will be called for each instrumented module. This ensures that at least one
+// __asan_set_seh_filter call happens after the .exe module CRT is initialized.
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE
+int __asan_set_seh_filter() {
+ // We should only store the previous handler if it's not our own handler in
+ // order to avoid loops in the EH chain.
+ auto prev_seh_handler = SetUnhandledExceptionFilter(SEHHandler);
+ if (prev_seh_handler != &SEHHandler)
+ default_seh_handler = prev_seh_handler;
+ return 0;
+}
+
+#if !ASAN_DYNAMIC
+// Put a pointer to __asan_set_seh_filter at the end of the global list
+// of C initializers, after the default EH is set by the CRT.
+#pragma section(".CRT$XIZ", long, read) // NOLINT
+static __declspec(allocate(".CRT$XIZ"))
+ int (*__intercept_seh)() = __asan_set_seh_filter;
+#endif
+
+} // namespace __asan
+
+#endif // _WIN32