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-rw-r--r--lib/sanitizer_common/sanitizer_unwind_win.cpp75
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_unwind_win.cpp b/lib/sanitizer_common/sanitizer_unwind_win.cpp
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+++ b/lib/sanitizer_common/sanitizer_unwind_win.cpp
@@ -0,0 +1,75 @@
+//===-- 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);
+}
+
+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 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