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#!/usr/bin/python2
#
# Copyright 2016 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.
"""Archive all source files that are references in binary debug info.
Invoked by libfuzzer buildbots. Executes dwarfdump to parse debug info.
"""
from __future__ import print_function
import argparse
import os
import re
import subprocess
import zipfile
compile_unit_re = re.compile('.*DW_TAG_compile_unit.*')
at_name_re = re.compile('.*DW_AT_name.*"(.*)".*')
def main():
parser = argparse.ArgumentParser(description="Zip binary sources.")
parser.add_argument('--binary', required=True,
help='binary file to read')
parser.add_argument('--workdir', required=True,
help='working directory to use to resolve relative paths')
parser.add_argument('--srcdir', required=True,
help='sources root directory to calculate zip entry names')
parser.add_argument('--output', required=True,
help='output zip file name')
parser.add_argument('--dwarfdump', required=False,
default='dwarfdump', help='path to dwarfdump utility')
args = parser.parse_args()
# Dump .debug_info section.
out = subprocess.check_output(
[args.dwarfdump, '-i', args.binary])
looking_for_unit = True
compile_units = set()
# Look for DW_AT_name within DW_TAG_compile_unit
for line in out.splitlines():
if looking_for_unit and compile_unit_re.match(line):
looking_for_unit = False
elif not looking_for_unit:
match = at_name_re.match(line)
if match:
compile_units.add(match.group(1))
looking_for_unit = True
# Zip sources.
with zipfile.ZipFile(args.output, 'w') as z:
for compile_unit in sorted(compile_units):
src_file = os.path.abspath(os.path.join(args.workdir, compile_unit))
print(src_file)
z.write(src_file, os.path.relpath(src_file, args.srcdir))
if __name__ == '__main__':
main()
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