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#!/usr/bin/python
# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Check that symbols are ordered into a binary as they appear in the orderfile.
"""
import logging
import optparse
import sys
import cygprofile_utils
import patch_orderfile
import symbol_extractor
_MAX_WARNINGS_TO_PRINT = 200
def _CountMisorderedSymbols(symbols, symbol_infos):
"""Count the number of misordered symbols, and log them.
Args:
symbols: ordered sequence of symbols from the orderfile
symbol_infos: ordered list of SymbolInfo from the binary
Returns:
(misordered_pairs_count, matched_symbols_count, unmatched_symbols_count)
"""
name_to_symbol_info = symbol_extractor.CreateNameToSymbolInfo(symbol_infos)
matched_symbol_infos = []
missing_count = 0
misordered_count = 0
# Find the SymbolInfo matching the orderfile symbols in the binary.
for symbol in symbols:
if symbol in name_to_symbol_info:
matched_symbol_infos.append(name_to_symbol_info[symbol])
else:
missing_count += 1
if missing_count < _MAX_WARNINGS_TO_PRINT:
logging.warning('Symbol "%s" is in the orderfile, not in the binary' %
symbol)
logging.info('%d matched symbols, %d un-matched (Only the first %d unmatched'
' symbols are shown)' % (
len(matched_symbol_infos), missing_count,
_MAX_WARNINGS_TO_PRINT))
# In the order of the orderfile, find all the symbols that are at an offset
# smaller than their immediate predecessor, and record the pair.
previous_symbol_info = symbol_extractor.SymbolInfo(
name='', offset=-1, size=0, section='')
for symbol_info in matched_symbol_infos:
if symbol_info.offset < previous_symbol_info.offset:
logging.warning("Misordered pair: %s - %s" % (
str(previous_symbol_info), str(symbol_info)))
misordered_count += 1
previous_symbol_info = symbol_info
return (misordered_count, len(matched_symbol_infos), missing_count)
def main():
parser = optparse.OptionParser(usage=
'usage: %prog [options] <binary> <orderfile>')
parser.add_option('--target-arch', action='store', dest='arch',
choices=['arm', 'arm64', 'x86', 'x86_64', 'x64', 'mips'],
help='The target architecture for the binary.')
parser.add_option('--threshold', action='store', dest='threshold', default=0,
help='The maximum allowed number of out-of-order symbols.')
options, argv = parser.parse_args(sys.argv)
if not options.arch:
options.arch = cygprofile_utils.DetectArchitecture()
if len(argv) != 3:
parser.print_help()
return 1
(binary_filename, orderfile_filename) = argv[1:]
symbol_extractor.SetArchitecture(options.arch)
symbols = patch_orderfile.GetSymbolsFromOrderfile(orderfile_filename)
symbol_infos = symbol_extractor.SymbolInfosFromBinary(binary_filename)
# Missing symbols is not an error since some of them can be eliminated through
# inlining.
(misordered_pairs_count, matched_symbols, _) = _CountMisorderedSymbols(
symbols, symbol_infos)
return (misordered_pairs_count > options.threshold) or (matched_symbols == 0)
if __name__ == '__main__':
logging.basicConfig(level=logging.INFO)
sys.exit(main())
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