2 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
3 # Use of this source code is governed by a BSD-style license that can be
4 # found in the LICENSE file.
5 """Reduces result of 'readelf -wL' to just a list of starting addresses.
7 It lists up all addresses where the corresponding source files change. The
8 list is sorted in ascending order. See tests/reduce_debugline_test.py for
11 This script assumes that the result of 'readelf -wL' ends with an empty line.
13 Note: the option '-wL' has the same meaning with '--debug-dump=decodedline'.
20 _FILENAME_PATTERN = re.compile('(CU: |)(.+)\:')
23 def reduce_decoded_debugline(input_file):
28 for line in input_file:
30 unpacked = line.split(None, 2)
32 if len(unpacked) == 3 and unpacked[2].startswith('0x'):
33 if not started and filename:
35 starting_dict[int(unpacked[2], 16)] = filename
38 if line.endswith(':'):
39 matched = _FILENAME_PATTERN.match(line)
41 filename = matched.group(2)
45 for address in sorted(starting_dict):
46 curr_filename = starting_dict[address]
47 if prev_filename != curr_filename:
48 starting_list.append((address, starting_dict[address]))
49 prev_filename = curr_filename
54 if len(sys.argv) != 1:
55 print >> sys.stderr, 'Unsupported arguments'
58 starting_list = reduce_decoded_debugline(sys.stdin)
59 bits64 = starting_list[-1][0] > 0xffffffff
60 for address, filename in starting_list:
62 print '%016x %s' % (address, filename)
64 print '%08x %s' % (address, filename)
67 if __name__ == '__main__':