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#!/usr/bin/python3
# Dump the output of LD_TRACE_LOADED_OBJECTS in architecture neutral format.
# Copyright (C) 2022-2024 Free Software Foundation, Inc.
# Copyright The GNU Toolchain Authors.
# This file is part of the GNU C Library.
#
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <https://www.gnu.org/licenses/>.
import argparse
import os
import subprocess
import sys
try:
subprocess.run
except:
class _CompletedProcess:
def __init__(self, args, returncode, stdout=None, stderr=None):
self.args = args
self.returncode = returncode
self.stdout = stdout
self.stderr = stderr
def _run(*popenargs, input=None, timeout=None, check=False, **kwargs):
assert(timeout is None)
with subprocess.Popen(*popenargs, **kwargs) as process:
try:
stdout, stderr = process.communicate(input)
except:
process.kill()
process.wait()
raise
returncode = process.poll()
if check and returncode:
raise subprocess.CalledProcessError(returncode, popenargs)
return _CompletedProcess(popenargs, returncode, stdout, stderr)
subprocess.run = _run
def is_vdso(lib):
return lib.startswith('linux-gate') or lib.startswith('linux-vdso')
def parse_trace(cmd, fref):
new_env = os.environ.copy()
new_env['LD_TRACE_LOADED_OBJECTS'] = '1'
trace_out = subprocess.run(cmd, stdout=subprocess.PIPE, check=True,
universal_newlines=True, env=new_env).stdout
trace = []
for line in trace_out.splitlines():
line = line.strip()
if is_vdso(line):
continue
fields = line.split('=>' if '=>' in line else ' ')
lib = os.path.basename(fields[0].strip())
if lib.startswith('ld'):
lib = 'ld'
elif lib.startswith('libc'):
lib = 'libc'
found = 1 if fields[1].strip() != 'not found' else 0
trace += ['{} {}'.format(lib, found)]
trace = sorted(trace)
reference = sorted(line.replace('\n','') for line in fref.readlines())
ret = 0 if trace == reference else 1
if ret != 0:
for i in reference:
if i not in trace:
print("Only in {}: {}".format(fref.name, i))
for i in trace:
if i not in reference:
print("Only in trace: {}".format(i))
sys.exit(ret)
def get_parser():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('command',
help='comand to run')
parser.add_argument('reference',
help='reference file to compare')
return parser
def main(argv):
parser = get_parser()
opts = parser.parse_args(argv)
with open(opts.reference, 'r') as fref:
# Remove the initial 'env' command.
parse_trace(opts.command.split()[1:], fref)
if __name__ == '__main__':
main(sys.argv[1:])
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