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#!/usr/bin/env python3
#
# Copyright (c) 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.
"""Generate or update an existing config (.options file) for libfuzzer test.
Invoked by GN from fuzzer_test.gni.
"""
import argparse
import configparser
import os
import sys
def AddSectionOptions(config, section_name, options):
"""Add |options| to the |section_name| section of |config|.
Throws an
assertion error if any option in |options| does not have exactly two
elements.
"""
if not options:
return
config.add_section(section_name)
for option_and_value in options:
assert len(option_and_value) == 2, (
'%s is not an option, value pair' % option_and_value)
config.set(section_name, *option_and_value)
def main():
parser = argparse.ArgumentParser(description='Generate fuzzer config.')
parser.add_argument('--config', required=True)
parser.add_argument('--dict')
parser.add_argument('--libfuzzer_options', nargs='+', default=[])
parser.add_argument('--asan_options', nargs='+', default=[])
parser.add_argument('--msan_options', nargs='+', default=[])
parser.add_argument('--ubsan_options', nargs='+', default=[])
parser.add_argument(
'--environment_variables',
nargs='+',
default=[],
choices=['AFL_DRIVER_DONT_DEFER=1'])
args = parser.parse_args()
# Script shouldn't be invoked without any arguments, but just in case.
if not (args.dict or args.libfuzzer_options or args.environment_variables or
args.asan_options or args.msan_options or args.ubsan_options):
return
config = configparser.ConfigParser()
libfuzzer_options = []
if args.dict:
libfuzzer_options.append(('dict', os.path.basename(args.dict)))
libfuzzer_options.extend(
option.split('=') for option in args.libfuzzer_options)
AddSectionOptions(config, 'libfuzzer', libfuzzer_options)
AddSectionOptions(config, 'asan',
[option.split('=') for option in args.asan_options])
AddSectionOptions(config, 'msan',
[option.split('=') for option in args.msan_options])
AddSectionOptions(config, 'ubsan',
[option.split('=') for option in args.ubsan_options])
AddSectionOptions(
config, 'env',
[option.split('=') for option in args.environment_variables])
# Generate .options file.
config_path = args.config
with open(config_path, 'w') as options_file:
options_file.write(
'# This is an automatically generated config for ClusterFuzz.\n')
config.write(options_file)
if __name__ == '__main__':
main()
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