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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 os
- import sys
- if sys.version_info.major == 2:
- from ConfigParser import ConfigParser
- else:
- from configparser import ConfigParser
- 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('--grammar_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 or
- args.grammar_options):
- return
- config = 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, 'grammar',
- [option.split('=') for option in args.grammar_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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