sym_extract.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_extract - Extract and output a list of symbols from a shared library.
"""
from argparse import ArgumentParser
from libcxx.sym_check import extract, util
def main():
parser = ArgumentParser(
description='Extract a list of symbols from a shared library.')
parser.add_argument('library', metavar='shared-lib', type=str,
help='The library to extract symbols from')
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('--names-only', dest='names_only',
help='Output only the name of the symbol',
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('--defined-only', dest='defined_only',
help="Filter all symbols that are not defined",
action='store_true', default=False)
parser.add_argument('--undefined-only', dest='undefined_only',
help="Filter all symbols that are defined",
action='store_true', default=False)
args = parser.parse_args()
assert not (args.undefined_only and args.defined_only)
if args.output is not None:
print('Extracting symbols from %s to %s.'
% (args.library, args.output))
syms = extract.extract_symbols(args.library)
if args.only_stdlib:
syms, other_syms = util.filter_stdlib_symbols(syms)
filter = lambda x: x
if args.defined_only:
filter = lambda l: list([x for x in l if x['is_defined']])
if args.undefined_only:
filter = lambda l: list([x for x in l if not x['is_defined']])
util.write_syms(syms, out=args.output, names_only=args.names_only, filter=filter)
if __name__ == '__main__':
main()