old_contents: #!/usr/bin/python
  #
  # 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/src/common/linux/file_id.cc@461
  
  import sys
  import struct
  import subprocess
  
  if len(sys.argv) != 2:
    sys.stderr.write("Error, no filename specified.\n")
    sys.exit(1)
  
  # Shell out to objdump to get the offset of the .text section
  objdump = subprocess.Popen(['objdump', '-h', sys.argv[1]], stdout = subprocess.PIPE)
  (sections, _) = objdump.communicate()
  if objdump.returncode != 0:
    sys.stderr.write('Failed to run objdump to find .text section.\n')
    sys.exit(1)
  
  text_section = [x for x in sections.split('\n') if '.text' in x]
  if len(text_section) == 0:
    sys.stderr.write('objdump failed to find a .text section.\n')
    sys.exit(1)
  text_section = text_section[0]
  file_offset = int(text_section.split()[5], 16)
  
  bin = open(sys.argv[1])
  bin.seek(file_offset)
  if bin.tell() != file_offset:
    sys.stderr.write("Failed to seek to the .text segment. Truncated file?\n");
    sys.exit(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)
  
new_contents: #!/usr/bin/python
  #
  # Copyright (c) 2010 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/src/common/linux/file_id.cc@461
  
  import struct
  import sys
  import subprocess
  
  if len(sys.argv) != 2:
    sys.stderr.write("Error, no filename specified.\n")
    sys.exit(1)
  
  # Shell out to objdump to get the offset of the .text section
  objdump = subprocess.Popen(['objdump', '-h', sys.argv[1]], stdout = subprocess.PIPE)
  (sections, _) = objdump.communicate()
  if objdump.returncode != 0:
    sys.stderr.write('Failed to run objdump to find .text section.\n')
    sys.exit(1)
  
  text_section = [x for x in sections.splitlines() if '.text' in x]
  if len(text_section) == 0:
    sys.stderr.write('objdump failed to find a .text section.\n')
    sys.exit(1)
  text_section = text_section[0]
  try:
    file_offset = int(text_section.split()[5], 16)
  except ValueError:
    sys.stderr.write("Failed to parse objdump output. Here is the failing line:\n");
    sys.stderr.write(text_section)
    sys.exit(1)
  
  bin = open(sys.argv[1])
  bin.seek(file_offset)
  if bin.tell() != file_offset:
    sys.stderr.write("Failed to seek to the .text segment. Truncated file?\n");
    sys.exit(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: Update dump_symbols to match new file_id code.