69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
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#!/usr/bin/env python
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# Copyright (c) 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Reduces result of 'readelf -wL' to just a list of starting addresses.
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It lists up all addresses where the corresponding source files change. The
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list is sorted in ascending order. See tests/reduce_debugline_test.py for
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examples.
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This script assumes that the result of 'readelf -wL' ends with an empty line.
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Note: the option '-wL' has the same meaning with '--debug-dump=decodedline'.
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"""
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import re
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import sys
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_FILENAME_PATTERN = re.compile('(CU: |)(.+)\:')
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def reduce_decoded_debugline(input_file):
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filename = ''
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starting_dict = {}
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started = False
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for line in input_file:
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line = line.strip()
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unpacked = line.split(None, 2)
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if len(unpacked) == 3 and unpacked[2].startswith('0x'):
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if not started and filename:
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started = True
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starting_dict[int(unpacked[2], 16)] = filename
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else:
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started = False
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if line.endswith(':'):
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matched = _FILENAME_PATTERN.match(line)
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if matched:
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filename = matched.group(2)
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starting_list = []
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prev_filename = ''
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for address in sorted(starting_dict):
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curr_filename = starting_dict[address]
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if prev_filename != curr_filename:
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starting_list.append((address, starting_dict[address]))
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prev_filename = curr_filename
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return starting_list
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def main():
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if len(sys.argv) != 1:
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print >> sys.stderr, 'Unsupported arguments'
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return 1
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starting_list = reduce_decoded_debugline(sys.stdin)
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bits64 = starting_list[-1][0] > 0xffffffff
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for address, filename in starting_list:
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if bits64:
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print '%016x %s' % (address, filename)
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else:
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print '%08x %s' % (address, filename)
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if __name__ == '__main__':
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sys.exit(main())
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