| //===-- sanitizer_unwind_win.cc -------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// Sanitizer unwind Windows specific functions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "sanitizer_platform.h" |
| #if SANITIZER_WINDOWS |
| |
| #define WIN32_LEAN_AND_MEAN |
| #define NOGDI |
| #include <windows.h> |
| |
| #include "sanitizer_dbghelp.h" // for StackWalk64 |
| #include "sanitizer_stacktrace.h" |
| #include "sanitizer_symbolizer.h" // for InitializeDbgHelpIfNeeded |
| |
| using namespace __sanitizer; |
| |
| #if !SANITIZER_GO |
| void BufferedStackTrace::SlowUnwindStack(uptr pc, u32 max_depth) { |
| CHECK_GE(max_depth, 2); |
| // FIXME: CaptureStackBackTrace might be too slow for us. |
| // FIXME: Compare with StackWalk64. |
| // FIXME: Look at LLVMUnhandledExceptionFilter in Signals.inc |
| size = CaptureStackBackTrace(1, Min(max_depth, kStackTraceMax), |
| (void **)&trace_buffer[0], 0); |
| if (size == 0) |
| return; |
| |
| // Skip the RTL frames by searching for the PC in the stacktrace. |
| uptr pc_location = LocatePcInTrace(pc); |
| PopStackFrames(pc_location); |
| } |
| |
| void BufferedStackTrace::SlowUnwindStackWithContext(uptr pc, void *context, |
| u32 max_depth) { |
| CONTEXT ctx = *(CONTEXT *)context; |
| STACKFRAME64 stack_frame; |
| memset(&stack_frame, 0, sizeof(stack_frame)); |
| |
| InitializeDbgHelpIfNeeded(); |
| |
| size = 0; |
| #if defined(_WIN64) |
| int machine_type = IMAGE_FILE_MACHINE_AMD64; |
| stack_frame.AddrPC.Offset = ctx.Rip; |
| stack_frame.AddrFrame.Offset = ctx.Rbp; |
| stack_frame.AddrStack.Offset = ctx.Rsp; |
| #else |
| int machine_type = IMAGE_FILE_MACHINE_I386; |
| stack_frame.AddrPC.Offset = ctx.Eip; |
| stack_frame.AddrFrame.Offset = ctx.Ebp; |
| stack_frame.AddrStack.Offset = ctx.Esp; |
| #endif |
| stack_frame.AddrPC.Mode = AddrModeFlat; |
| stack_frame.AddrFrame.Mode = AddrModeFlat; |
| stack_frame.AddrStack.Mode = AddrModeFlat; |
| while (StackWalk64(machine_type, GetCurrentProcess(), GetCurrentThread(), |
| &stack_frame, &ctx, NULL, SymFunctionTableAccess64, |
| SymGetModuleBase64, NULL) && |
| size < Min(max_depth, kStackTraceMax)) { |
| trace_buffer[size++] = (uptr)stack_frame.AddrPC.Offset; |
| } |
| } |
| #endif // #if !SANITIZER_GO |
| |
| #endif // SANITIZER_WINDOWS |