зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
3.5 KiB
Python
94 строки
3.5 KiB
Python
# ***** BEGIN LICENSE BLOCK *****
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is mozilla.org
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#
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# The Initial Developer of the Original Code is
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# the Mozilla Foundation
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# Portions created by the Initial Developer are Copyright (C) 2011
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Mike Hommey <mh@glandium.org>
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ***** END LICENSE BLOCK *****
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# This script returns the number of items for the DW_AT_ranges corresponding
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# to a given compilation unit. This is used as a helper to find a bug in some
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# versions of GNU ld.
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import subprocess
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import sys
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import re
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def get_range_for(compilation_unit, debug_info):
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'''Returns the range offset for a given compilation unit
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in a given debug_info.'''
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name = ranges = ''
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search_cu = False
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for nfo in debug_info.splitlines():
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if 'DW_TAG_compile_unit' in nfo:
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search_cu = True
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elif 'DW_TAG_' in nfo or not nfo.strip():
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if name == compilation_unit:
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return int(ranges, 16)
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name = ranges = ''
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search_cu = False
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if search_cu:
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if 'DW_AT_name' in nfo:
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name = nfo.rsplit(None, 1)[1]
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elif 'DW_AT_ranges' in nfo:
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ranges = nfo.rsplit(None, 1)[1]
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return None
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def get_range_length(range, debug_ranges):
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'''Returns the number of items in the range starting at the
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given offset.'''
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length = 0
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for line in debug_ranges.splitlines():
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m = re.match('\s*([0-9a-fA-F]+)\s+([0-9a-fA-F]+)\s+([0-9a-fA-F]+)', line)
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if m and int(m.group(1), 16) == range:
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length += 1
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return length
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def main(bin, compilation_unit):
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p = subprocess.Popen(['objdump', '-W', bin], stdout = subprocess.PIPE, stderr = subprocess.PIPE)
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(out, err) = p.communicate()
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sections = re.split('\n(Contents of the|The section) ', out)
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debug_info = [s for s in sections if s.startswith('.debug_info')]
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debug_ranges = [s for s in sections if s.startswith('.debug_ranges')]
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if not debug_ranges or not debug_info:
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return 0
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range = get_range_for(compilation_unit, debug_info[0])
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if range is not None:
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return get_range_length(range, debug_ranges[0])
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return -1
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if __name__ == '__main__':
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print main(*sys.argv[1:])
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