| #!/usr/bin/env python |
| # Copyright (c) 2015 The Native Client Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Tool to check if a glibc binary has a valid NEEDED order.""" |
| |
| import os |
| import re |
| import subprocess |
| import sys |
| |
| |
| def Check(filename): |
| lines = subprocess.check_output( |
| [os.environ.get('OBJDUMP', 'objdump'), '-p', filename]).splitlines() |
| needed = [i for i in lines if 'NEEDED' in i] |
| names = [re.match('[ ]+NEEDED[ ]+(.*)', i).group(1) for i in needed] |
| pthread = -1 |
| nacl_io = -1 |
| nacl_spawn = -1 |
| for i, name in enumerate(names): |
| if nacl_io < 0 and name == 'libnacl_io.so': |
| nacl_io = i |
| elif nacl_spawn < 0 and name == 'libnacl_spawn.so': |
| nacl_spawn = i |
| elif pthread < 0 and name.startswith('libpthread.so'): |
| pthread = i |
| if pthread != -1 and (pthread < nacl_io or pthread < nacl_spawn): |
| print 'Executable %s has bad NEEDED order: %s' % (filename, ' '.join(names)) |
| return 1 |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(Check(sys.argv[1])) |
