1 #!/usr/bin/env python 2 #===----------------------------------------------------------------------===## 3 # 4 # The LLVM Compiler Infrastructure 5 # 6 # This file is dual licensed under the MIT and the University of Illinois Open 7 # Source Licenses. See LICENSE.TXT for details. 8 # 9 #===----------------------------------------------------------------------===## 10 """ 11 sym_diff - Compare two symbol lists and output the differences. 12 """ 13 14 from argparse import ArgumentParser 15 import sys 16 from libcxx.sym_check import diff, util 17 18 19 def main(): 20 parser = ArgumentParser( 21 description='Extract a list of symbols from a shared library.') 22 parser.add_argument( 23 '--names-only', dest='names_only', 24 help='Only print symbol names', 25 action='store_true', default=False) 26 parser.add_argument( 27 '--removed-only', dest='removed_only', 28 help='Only print removed symbols', 29 action='store_true', default=False) 30 parser.add_argument('--only-stdlib-symbols', dest='only_stdlib', 31 help="Filter all symbols not related to the stdlib", 32 action='store_true', default=False) 33 parser.add_argument('--strict', dest='strict', 34 help="Exit with a non-zero status if any symbols " 35 "differ", 36 action='store_true', default=False) 37 parser.add_argument( 38 '-o', '--output', dest='output', 39 help='The output file. stdout is used if not given', 40 type=str, action='store', default=None) 41 parser.add_argument( 42 '--demangle', dest='demangle', action='store_true', default=False) 43 parser.add_argument( 44 'old_syms', metavar='old-syms', type=str, 45 help='The file containing the old symbol list or a library') 46 parser.add_argument( 47 'new_syms', metavar='new-syms', type=str, 48 help='The file containing the new symbol list or a library') 49 args = parser.parse_args() 50 51 old_syms_list = util.extract_or_load(args.old_syms) 52 new_syms_list = util.extract_or_load(args.new_syms) 53 54 if args.only_stdlib: 55 old_syms_list, _ = util.filter_stdlib_symbols(old_syms_list) 56 new_syms_list, _ = util.filter_stdlib_symbols(new_syms_list) 57 58 added, removed, changed = diff.diff(old_syms_list, new_syms_list) 59 if args.removed_only: 60 added = {} 61 report, is_break, is_different = diff.report_diff( 62 added, removed, changed, names_only=args.names_only, 63 demangle=args.demangle) 64 if args.output is None: 65 print(report) 66 else: 67 with open(args.output, 'w') as f: 68 f.write(report + '\n') 69 exit_code = 1 if is_break or (args.strict and is_different) else 0 70 sys.exit(exit_code) 71 72 if __name__ == '__main__': 73 main() 74
