blob: c41a21029cdb741b37cbd1c44a581fa00cacea1f [file] [log] [blame]
#!/usr/bin/env python
# Copyright 2016 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.
Prints the contents of the __DATA,__mod_init_func section of a Mach-O image.
tools/mac/ out/gn/Chromium\ Framework.unstripped
This is meant to be used on a Mach-O executable. If a dSYM is present, use instead.
import optparse
import subprocess
import sys
def ShowModuleInitializers(binary):
"""Gathers the module initializers for |binary| and symbolizes the addresses.
initializers = GetModuleInitializers(binary)
if not initializers:
# atos will do work even if there are no addresses, so bail early.
symbols = SymbolizeAddresses(binary, initializers)
print binary
for initializer in zip(initializers, symbols):
print '%s @ %s' % initializer
def GetModuleInitializers(binary):
"""Parses the __DATA,__mod_init_func segment of |binary| and returns a list
of string hexadecimal addresses of the module initializers.
# The -v flag will display the addresses in a usable form (as opposed to
# just its on-disk little-endian byte representation).
otool = ['otool', '-v', '-s', '__DATA', '__mod_init_func', binary]
lines = subprocess.check_output(otool).strip().split('\n')
# Skip the first two header lines and then get the address of the
# initializer in the second column. The first address is the address
# of the initializer pointer.
# out/gn/Chromium Framework.unstripped:
# Contents of (__DATA,__mod_init_func) section
# 0x0000000008761498 0x000000000385d120
return [line.split(' ')[1] for line in lines[2:]]
def SymbolizeAddresses(binary, addresses):
"""Given a |binary| and a list of |addresses|, symbolizes them using atos.
atos = ['xcrun', 'atos', '-o', binary] + addresses
lines = subprocess.check_output(atos).strip().split('\n')
return lines
def Main():
parser = optparse.OptionParser(usage='%prog filename')
opts, args = parser.parse_args()
if len(args) != 1:
parser.error('missing binary filename')
return 1
return 0
if __name__ == '__main__':