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#!/usr/bin/env python
# Copyright 2013 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.
"""A tool to extract minidumps from dmp crash dumps."""
import os
import sys
from cgi import parse_multipart
def ProcessDump(dump_file, minidump_file):
"""Extracts the part of the dump file that minidump_stackwalk can read.
The dump files generated by the breakpad integration multi-part form data
that include the minidump as file attachment.
Args:
dump_file: the dump file that needs to be processed.
minidump_file: the file to write the minidump to.
"""
try:
dump = open(dump_file, 'rb')
boundary = dump.readline().strip()[2:]
data = parse_multipart(dump, {'boundary': boundary})
except:
print 'Failed to read dmp file %s' % dump_file
return
if not 'upload_file_minidump' in data:
print 'Could not find minidump file in dump.'
return
f = open(minidump_file, 'w')
f.write("\r\n".join(data['upload_file_minidump']))
f.close()
def main():
if len(sys.argv) != 3:
print 'Usage: %s [dmp file] [minidump]' % sys.argv[0]
print ''
print 'Extracts the minidump stored in the crash dump file'
return 1
ProcessDump(sys.argv[1], sys.argv[2])
if '__main__' == __name__:
sys.exit(main())
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