Replace DumpBacktrace with Chromium's StackTrace implementation.

src/base/debug/stack_trace.h

Index: src/base/debug/stack_trace.h
diff --git a/src/base/debug/stack_trace.h b/src/base/debug/stack_trace.h
new file mode 100644
index 0000000000000000000000000000000000000000..b157be21cfb058bce2f1babf93f81f556dfe5fe8
--- /dev/null
+++ b/src/base/debug/stack_trace.h
@@ -0,0 +1,93 @@
+// Copyright 2016 the V8 project authors. All rights reserved.

[Jakob Kummerow, 2016/08/18 09:36:13]

If this is copied from Chromium, it should probably retain its original
copyright header, maybe with an added remark (see src/base/safe_math.h for an
existing example).

[Michael Starzinger, 2016/08/18 10:39:18]

+1. Applies to all five stack-trace files I suppose.

[rmcilroy, 2016/08/18 11:39:48]

Thanks. I changed this since presumbit hooks complained, but the approach in
safe_math.h works. Done.

+// 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_

[Michael Starzinger, 2016/08/18 10:39:19]

nit: V8_BASE_DEBUG_STACK_TRACE_H_

[rmcilroy, 2016/08/18 11:39:48]

Done.

+#define BASE_DEBUG_STACK_TRACE_H_
+
+#include <stddef.h>
+
+#include <iosfwd>
+#include <string>
+
+#include "src/base/build_config.h"
+
+#if V8_OS_POSIX
+#include <unistd.h>
+#endif
+
+#if V8_OS_WIN
+struct _EXCEPTION_POINTERS;
+struct _CONTEXT;
+#endif
+
+namespace v8 {
+namespace base {
+namespace debug {
+
+// Enables stack dump to console output on exception and signals.
+// When enabled, the process will quit immediately. This is meant to be used in
+// tests only!
+bool EnableInProcessStackDumping();
+void DisableSignalStackDump();
+
+// 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();
+
+  // Creates a stacktrace from an existing array of instruction
+  // pointers (such as returned by Addresses()).  |count| will be
+  // trimmed to |kMaxTraces|.
+  StackTrace(const void* const* trace, size_t count);
+
+#if V8_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.
+  explicit StackTrace(_EXCEPTION_POINTERS* exception_pointers);
+  explicit StackTrace(const _CONTEXT* context);
+#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) const;
+
+  // Prints the stack trace to stderr.
+  void Print() const;
+
+  // Resolves backtrace to symbols and write to stream.
+  void OutputToStream(std::ostream* os) const;
+
+  // Resolves backtrace to symbols and returns as string.
+  std::string ToString() const;
+
+ private:
+#if V8_OS_WIN
+  void InitTrace(const _CONTEXT* context_record);
+#endif
+
+  // 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];
+
+  // The number of valid frames in |trace_|.
+  size_t count_;
+};
+
+}  // namespace debug
+}  // namespace base
+}  // namespace v8
+
+#endif  // BASE_DEBUG_STACK_TRACE_H_

[Michael Starzinger, 2016/08/18 10:39:18]

nit: V8_BASE_DEBUG_STACK_TRACE_H_

[rmcilroy, 2016/08/18 11:39:48]

Done.