old_contents: #!/usr/bin/python2.4
  #
  # Copyright (c) 2009 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.
  #
  # This generates symbol signatures with the same algorithm as
  # src/breakpad/linux/minidump_writer.cc@17081
  
  import sys
  import struct
  
  if len(sys.argv) != 2:
    sys.stderr.write("Error, no filename specified.\n")
    sys.exit(1)
  
  bin = open(sys.argv[1])
  data = bin.read(4096)
  if len(data) != 4096:
    sys.stderr.write("Error, did not read first page of data.\n");
    sys.exit(1)
  bin.close()
  
  signature = [0] * 16
  for i in range(0, 4096):
    signature[i % 16] ^= ord(data[i])
  
  out = ('%08x%04x%04x%02x%02x%02x%02x%02x%02x%02x%02x0' %
        struct.unpack('I2H8B', struct.pack('16B', *signature)))
  sys.stdout.write(out)
  
new_contents: #!/usr/bin/python2.4
  #
  # Copyright (c) 2009 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.
  #
  # This generates symbol signatures with the same algorithm as
  # src/breakpad/linux/minidump_writer.cc@17081
  
  import sys
  import struct
  
  if len(sys.argv) != 2:
    sys.stderr.write("Error, no filename specified.\n")
    sys.exit(1)
  
  bin = open(sys.argv[1])
  data = bin.read(4096)
  if len(data) != 4096:
    sys.stderr.write("Error, did not read first page of data.\n");
    sys.exit(1)
  bin.close()
  
  signature = [0] * 16
  for i in range(0, 4096):
    signature[i % 16] ^= ord(data[i])
  
  # Append a 0 at the end for the generation number (always 0 on Linux)
  out = ('%08X%04X%04X%02X%02X%02X%02X%02X%02X%02X%02X0' %
        struct.unpack('I2H8B', struct.pack('16B', *signature)))
  sys.stdout.write(out)
  
subject: Make symbol signatures upper-case. Review URL: http://codereview.chromium.org/132034