forked from OSchip/llvm-project
128 lines
4.4 KiB
C++
128 lines
4.4 KiB
C++
//===-- sanitizer_symbolizer_win.cc ---------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries.
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// Windows-specific implementation of symbolizer parts.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_WINDOWS
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#include <windows.h>
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#include <dbghelp.h>
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#pragma comment(lib, "dbghelp.lib")
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#include "sanitizer_symbolizer.h"
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namespace __sanitizer {
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class WinSymbolizer : public Symbolizer {
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public:
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WinSymbolizer() : initialized_(false) {}
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uptr SymbolizePC(uptr addr, AddressInfo *frames, uptr max_frames) {
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if (max_frames == 0)
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return 0;
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BlockingMutexLock l(&dbghelp_mu_);
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if (!initialized_) {
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if (!TrySymInitialize()) {
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// OK, maybe the client app has called SymInitialize already.
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// That's a bit unfortunate for us as all the DbgHelp functions are
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// single-threaded and we can't coordinate with the app.
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// FIXME: Can we stop the other threads at this point?
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// Anyways, we have to reconfigure stuff to make sure that SymInitialize
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// has all the appropriate options set.
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// Cross our fingers and reinitialize DbgHelp.
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Report("*** WARNING: Failed to initialize DbgHelp! ***\n");
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Report("*** Most likely this means that the app is already ***\n");
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Report("*** using DbgHelp, possibly with incompatible flags. ***\n");
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Report("*** Due to technical reasons, symbolization might crash ***\n");
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Report("*** or produce wrong results. ***\n");
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SymCleanup(GetCurrentProcess());
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TrySymInitialize();
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}
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initialized_ = true;
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}
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// See http://msdn.microsoft.com/en-us/library/ms680578(VS.85).aspx
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char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(CHAR)];
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PSYMBOL_INFO symbol = (PSYMBOL_INFO)buffer;
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symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
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symbol->MaxNameLen = MAX_SYM_NAME;
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DWORD64 offset = 0;
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BOOL got_objname = SymFromAddr(GetCurrentProcess(),
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(DWORD64)addr, &offset, symbol);
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if (!got_objname)
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return 0;
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DWORD unused;
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IMAGEHLP_LINE64 line_info;
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line_info.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
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BOOL got_fileline = SymGetLineFromAddr64(GetCurrentProcess(), (DWORD64)addr,
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&unused, &line_info);
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AddressInfo *info = &frames[0];
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info->Clear();
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info->function = internal_strdup(symbol->Name);
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info->function_offset = (uptr)offset;
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if (got_fileline) {
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info->file = internal_strdup(line_info.FileName);
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info->line = line_info.LineNumber;
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}
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IMAGEHLP_MODULE64 mod_info;
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internal_memset(&mod_info, 0, sizeof(mod_info));
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mod_info.SizeOfStruct = sizeof(mod_info);
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if (SymGetModuleInfo64(GetCurrentProcess(), addr, &mod_info))
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info->FillAddressAndModuleInfo(addr, mod_info.ImageName,
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addr - (uptr)mod_info.BaseOfImage);
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return 1;
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}
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bool CanReturnFileLineInfo() {
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return true;
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}
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const char *Demangle(const char *name) {
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CHECK(initialized_);
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static char demangle_buffer[1000];
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if (name[0] == '\01' &&
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UnDecorateSymbolName(name + 1, demangle_buffer, sizeof(demangle_buffer),
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UNDNAME_NAME_ONLY))
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return demangle_buffer;
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else
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return name;
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}
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// FIXME: Implement GetModuleNameAndOffsetForPC().
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private:
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bool TrySymInitialize() {
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SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_UNDNAME | SYMOPT_LOAD_LINES);
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return SymInitialize(GetCurrentProcess(), 0, TRUE);
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// FIXME: We don't call SymCleanup() on exit yet - should we?
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}
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// All DbgHelp functions are single threaded, so we should use a mutex to
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// serialize accesses.
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BlockingMutex dbghelp_mu_;
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bool initialized_;
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};
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Symbolizer *Symbolizer::PlatformInit() {
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static bool called_once = false;
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CHECK(!called_once && "Shouldn't create more than one symbolizer");
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called_once = true;
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return new(symbolizer_allocator_) WinSymbolizer();
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}
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} // namespace __sanitizer
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#endif // _WIN32
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