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//===-- sanitizer_unwind_win.cpp ------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// 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::UnwindSlow(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);
// Replace the first frame with the PC because the frame in the
// stacktrace might be incorrect.
trace_buffer[0] = pc;
}
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wframe-larger-than="
#endif
void BufferedStackTrace::UnwindSlow(uptr pc, void *context, u32 max_depth) {
CHECK(context);
CHECK_GE(max_depth, 2);
CONTEXT ctx = *(CONTEXT *)context;
STACKFRAME64 stack_frame;
memset(&stack_frame, 0, sizeof(stack_frame));
InitializeDbgHelpIfNeeded();
size = 0;
# if SANITIZER_WINDOWS64
# if SANITIZER_ARM64
int machine_type = IMAGE_FILE_MACHINE_ARM64;
stack_frame.AddrPC.Offset = ctx.Pc;
stack_frame.AddrFrame.Offset = ctx.Fp;
stack_frame.AddrStack.Offset = ctx.Sp;
# else
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;
# endif
# 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;
}
}
# ifdef __clang__
# pragma clang diagnostic pop
# endif
# endif // #if !SANITIZER_GO
#endif // SANITIZER_WINDOWS
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