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()) 52
