/thirdparty/breakpad/third_party/glog/src/stacktrace_generic-inl.h

 1// Copyright (c) 2000 - 2007, Google Inc.
 2// All rights reserved.
 3//
 4// Redistribution and use in source and binary forms, with or without
 5// modification, are permitted provided that the following conditions are
 6// met:
 7//
 8//     * Redistributions of source code must retain the above copyright
 9// notice, this list of conditions and the following disclaimer.
10//     * Redistributions in binary form must reproduce the above
11// copyright notice, this list of conditions and the following disclaimer
12// in the documentation and/or other materials provided with the
13// distribution.
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15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// Portable implementation - just use glibc
31//
32// Note:  The glibc implementation may cause a call to malloc.
33// This can cause a deadlock in HeapProfiler.
34#include <execinfo.h>
35#include <string.h>
36#include "stacktrace.h"
37
38_START_GOOGLE_NAMESPACE_
39
40// If you change this function, also change GetStackFrames below.
41int GetStackTrace(void** result, int max_depth, int skip_count) {
42  static const int kStackLength = 64;
43  void * stack[kStackLength];
44  int size;
45
46  size = backtrace(stack, kStackLength);
47  skip_count++;  // we want to skip the current frame as well
48  int result_count = size - skip_count;
49  if (result_count < 0)
50    result_count = 0;
51  if (result_count > max_depth)
52    result_count = max_depth;
53  for (int i = 0; i < result_count; i++)
54    result[i] = stack[i + skip_count];
55
56  return result_count;
57}
58
59_END_GOOGLE_NAMESPACE_