Differential D4627 Diff 17042 test/fuzz/test_runner.py

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test/fuzz/test_runner.py

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				#!/usr/bin/env python3
				# Copyright (c) 2019 The Bitcoin Core developers
				# Distributed under the MIT software license, see the accompanying
				# file COPYING or http://www.opensource.org/licenses/mit-license.php.
				"""Run fuzz test targets.
				"""

				import argparse
				import configparser
				import logging
				import os
				import subprocess
				import sys


				def main():
				parser = argparse.ArgumentParser(
				formatter_class=argparse.ArgumentDefaultsHelpFormatter)
				parser.add_argument(
				"-l",
				"--loglevel",
				dest="loglevel",
				default="INFO",
				help="log events at this level and higher to the console. Can be set to DEBUG, INFO, WARNING, ERROR or CRITICAL. Passing --loglevel DEBUG will output all logs to console.",
				)
				parser.add_argument(
				'--export_coverage',
				action='store_true',
				help='If true, export coverage information to files in the seed corpus',
				)
				parser.add_argument(
				'seed_dir',
				help='The seed corpus to run on (must contain subfolders for each fuzz target).',
				)
				parser.add_argument(
				'target',
				nargs='*',
				help='The target(s) to run. Default is to run all targets.',
				)

				args = parser.parse_args()

				# Set up logging
				logging.basicConfig(
				format='%(message)s',
				level=int(args.loglevel) if args.loglevel.isdigit(
				) else args.loglevel.upper(),
				)

				# Read config generated by configure.
				config = configparser.ConfigParser()
				configfile = os.path.abspath(os.path.dirname(__file__)) + "/../config.ini"
				config.read_file(open(configfile, encoding="utf8"))

				if not config["components"].getboolean("ENABLE_FUZZ"):
				logging.error("Must have fuzz targets built")
				sys.exit(1)

				# Build list of tests
				test_list_all = parse_test_list(makefile=os.path.join(
				config["environment"]["SRCDIR"], 'src', 'Makefile.test.include'))

				if not test_list_all:
				logging.error("No fuzz targets found")
				sys.exit(1)

				logging.info("Fuzz targets found: {}".format(test_list_all))

				# By default run all
				args.target = args.target or test_list_all
				test_list_error = list(set(args.target).difference(set(test_list_all)))
				if test_list_error:
				logging.error(
				"Unknown fuzz targets selected: {}".format(test_list_error))
				test_list_selection = list(
				set(test_list_all).intersection(set(args.target)))
				if not test_list_selection:
				logging.error("No fuzz targets selected")
				logging.info("Fuzz targets selected: {}".format(test_list_selection))

				try:
				help_output = subprocess.run(
				args=[
				os.path.join(config["environment"]["BUILDDIR"],
				'src', 'test', 'fuzz', test_list_selection[0]),
				'-help=1',
				],
				timeout=1,
				check=True,
				stderr=subprocess.PIPE,
				universal_newlines=True,
				).stderr
				if "libFuzzer" not in help_output:
				logging.error("Must be built with libFuzzer")
				sys.exit(1)
				except subprocess.TimeoutExpired:
				logging.error(
				"subprocess timed out: Currently only libFuzzer is supported")
				sys.exit(1)

				run_once(
				corpus=args.seed_dir,
				test_list=test_list_selection,
				build_dir=config["environment"]["BUILDDIR"],
				export_coverage=args.export_coverage,
				)


				def run_once(*, corpus, test_list, build_dir, export_coverage):
				for t in test_list:
				args = [
				os.path.join(build_dir, 'src', 'test', 'fuzz', t),
				'-runs=1',
				os.path.join(corpus, t),
				]
				logging.debug('Run {} with args {}'.format(t, args))
				output = subprocess.run(
				args, check=True, stderr=subprocess.PIPE, universal_newlines=True).stderr
				logging.debug('Output: {}'.format(output))
				if not export_coverage:
				continue
				for l in output.splitlines():
				if 'INITED' in l:
				with open(os.path.join(corpus, t + '_coverage'), 'w', encoding='utf-8') as cov_file:
				cov_file.write(l)
				break


				def parse_test_list(makefile):
				with open(makefile, encoding='utf-8') as makefile_test:
				test_list_all = []
				read_targets = False
				for line in makefile_test.readlines():
				line = line.strip().replace('test/fuzz/', '').replace(' \\', '')
				if read_targets:
				if not line:
				break
				test_list_all.append(line)
				continue

				if line == 'FUZZ_TARGETS =':
				read_targets = True
				return test_list_all


				if __name__ == '__main__':
				main()