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