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-rw-r--r--lib/asan/asan_win.cc154
1 files changed, 66 insertions, 88 deletions
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
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