1 files changed, 63 insertions, 0 deletions
diff --git a/base/debug/stack_trace.h b/base/debug/stack_trace.h
new file mode 100644
index 0000000..8afc32c
--- /dev/null
+++ b/base/debug/stack_trace.h
@@ -0,0 +1,63 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_DEBUG_STACK_TRACE_H_
+#define BASE_DEBUG_STACK_TRACE_H_
+#pragma once
+
+#include <iosfwd>
+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+struct _EXCEPTION_POINTERS;
+#endif
+
+namespace base {
+namespace debug {
+
+// A stacktrace can be helpful in debugging. For example, you can include a
+// stacktrace member in a object (probably around #ifndef NDEBUG) so that you
+// can later see where the given object was created from.
+class StackTrace {
+ public:
+  // Creates a stacktrace from the current location.
+  StackTrace();
+
+#if defined(OS_WIN)
+  // Creates a stacktrace for an exception.
+  // Note: this function will throw an import not found (StackWalk64) exception
+  // on system without dbghelp 5.1.
+  StackTrace(_EXCEPTION_POINTERS* exception_pointers);
+#endif
+
+  // Copying and assignment are allowed with the default functions.
+
+  ~StackTrace();
+
+  // Gets an array of instruction pointer values. |*count| will be set to the
+  // number of elements in the returned array.
+  const void* const* Addresses(size_t* count);
+
+  // Prints a backtrace to stderr
+  void PrintBacktrace();
+
+  // Resolves backtrace to symbols and write to stream.
+  void OutputToStream(std::ostream* os);
+
+ private:
+  // From http://msdn.microsoft.com/en-us/library/bb204633.aspx,
+  // the sum of FramesToSkip and FramesToCapture must be less than 63,
+  // so set it to 62. Even if on POSIX it could be a larger value, it usually
+  // doesn't give much more information.
+  static const int kMaxTraces = 62;
+
+  void* trace_[kMaxTraces];
+  int count_;
+};
+
+}  // namespace debug
+}  // namespace base
+
+#endif  // BASE_DEBUG_STACK_TRACE_H_