sym_diff.py
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#!/usr/bin/env python
#===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===----------------------------------------------------------------------===##
"""
sym_diff - Compare two symbol lists and output the differences.
"""
from argparse import ArgumentParser
import sys
from libcxx.sym_check import diff, util
def main():
parser = ArgumentParser(
description='Extract a list of symbols from a shared library.')
parser.add_argument(
'--names-only', dest='names_only',
help='Only print symbol names',
action='store_true', default=False)
parser.add_argument(
'--removed-only', dest='removed_only',
help='Only print removed symbols',
action='store_true', default=False)
parser.add_argument('--only-stdlib-symbols', dest='only_stdlib',
help="Filter all symbols not related to the stdlib",
action='store_true', default=False)
parser.add_argument('--strict', dest='strict',
help="Exit with a non-zero status if any symbols "
"differ",
action='store_true', default=False)
parser.add_argument(
'-o', '--output', dest='output',
help='The output file. stdout is used if not given',
type=str, action='store', default=None)
parser.add_argument(
'--demangle', dest='demangle', action='store_true', default=False)
parser.add_argument(
'old_syms', metavar='old-syms', type=str,
help='The file containing the old symbol list or a library')
parser.add_argument(
'new_syms', metavar='new-syms', type=str,
help='The file containing the new symbol list or a library')
args = parser.parse_args()
old_syms_list = util.extract_or_load(args.old_syms)
new_syms_list = util.extract_or_load(args.new_syms)
if args.only_stdlib:
old_syms_list, _ = util.filter_stdlib_symbols(old_syms_list)
new_syms_list, _ = util.filter_stdlib_symbols(new_syms_list)
added, removed, changed = diff.diff(old_syms_list, new_syms_list)
if args.removed_only:
added = {}
report, is_break, is_different = diff.report_diff(
added, removed, changed, names_only=args.names_only,
demangle=args.demangle)
if args.output is None:
print(report)
else:
with open(args.output, 'w') as f:
f.write(report + '\n')
exit_code = 1 if is_break or (args.strict and is_different) else 0
sys.exit(exit_code)
if __name__ == '__main__':
main()