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1 #!/usr/bin/env python | |
2 # Copyright 2013 The Chromium Authors. All rights reserved. | |
3 # Use of this source code is governed by a BSD-style license that can be | |
4 # found in the LICENSE file. | |
5 | |
6 """A tool to extract minidumps from dmp crash dumps.""" | |
7 | |
8 import os | |
9 import sys | |
10 from cgi import parse_multipart | |
11 | |
12 | |
13 def ProcessDump(dump_file, minidump_file): | |
14 """Extracts the part of the dump file that minidump_stackwalk can read. | |
15 | |
16 The dump files generated by the breakpad integration multi-part form data | |
17 that include the minidump as file attachment. | |
18 | |
19 Args: | |
20 dump_file: the dump file that needs to be processed. | |
21 minidump_file: the file to write the minidump to. | |
22 """ | |
23 try: | |
24 dump = open(dump_file, 'rb') | |
25 boundary = dump.readline().strip()[2:] | |
26 data = parse_multipart(dump, {'boundary': boundary}) | |
27 except: | |
28 print 'Failed to read dmp file %s' % dump_file | |
29 return | |
30 | |
31 if not 'upload_file_minidump' in data: | |
32 print 'Could not find minidump file in dump.' | |
33 return | |
34 | |
35 f = open(minidump_file, 'w') | |
36 f.write("\r\n".join(data['upload_file_minidump'])) | |
37 f.close() | |
38 | |
39 | |
40 def main(): | |
41 if len(sys.argv) != 3: | |
42 print 'Usage: %s [dmp file] [minidump]' % sys.argv[0] | |
43 print '' | |
44 print 'Extracts the minidump stored in the crash dump file' | |
45 return 1 | |
46 | |
47 ProcessDump(sys.argv[1], sys.argv[2]) | |
48 | |
49 | |
50 if '__main__' == __name__: | |
51 sys.exit(main()) | |
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