mirror of
https://github.com/yuzu-emu/mbedtls.git
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adc82f3535
The tests were not covering get for a symbol with a value. No symbol has an uncommented value in the default config.h. (Actually there's _CRT_SECURE_NO_DEPRECATE, but that's a bit of a hack that this script is not expected to handle, so don't use it). Add tests of "get FOO" after "set FOO" and "set FOO value", so that we have coverage for "get FOO" when "FOO" has a value.
188 lines
7.3 KiB
Python
Executable File
188 lines
7.3 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Test helper for the Mbed TLS configuration file tool
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Run config.py with various parameters and write the results to files.
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This is a harness to help regression testing, not a functional tester.
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Sample usage:
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test_config_script.py -d old
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## Modify config.py and/or config.h ##
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test_config_script.py -d new
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diff -ru old new
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"""
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## Copyright (C) 2019, ARM Limited, All Rights Reserved
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## SPDX-License-Identifier: Apache-2.0
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##
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## Licensed under the Apache License, Version 2.0 (the "License"); you may
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## not use this file except in compliance with the License.
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## You may obtain a copy of the License at
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##
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## http://www.apache.org/licenses/LICENSE-2.0
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##
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## Unless required by applicable law or agreed to in writing, software
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## distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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## WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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## See the License for the specific language governing permissions and
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## limitations under the License.
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##
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## This file is part of Mbed TLS (https://tls.mbed.org)
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import argparse
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import glob
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import os
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import re
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import shutil
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import subprocess
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OUTPUT_FILE_PREFIX = 'config-'
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def output_file_name(directory, stem, extension):
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return os.path.join(directory,
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'{}{}.{}'.format(OUTPUT_FILE_PREFIX,
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stem, extension))
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def cleanup_directory(directory):
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"""Remove old output files."""
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for extension in []:
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pattern = output_file_name(directory, '*', extension)
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filenames = glob.glob(pattern)
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for filename in filenames:
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os.remove(filename)
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def prepare_directory(directory):
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"""Create the output directory if it doesn't exist yet.
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If there are old output files, remove them.
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"""
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if os.path.exists(directory):
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cleanup_directory(directory)
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else:
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os.makedirs(directory)
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def guess_presets_from_help(help_text):
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"""Figure out what presets the script supports.
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help_text should be the output from running the script with --help.
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"""
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# Try the output format from config.py
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hits = re.findall(r'\{([-\w,]+)\}', help_text)
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for hit in hits:
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words = set(hit.split(','))
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if 'get' in words and 'set' in words and 'unset' in words:
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words.remove('get')
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words.remove('set')
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words.remove('unset')
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return words
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# Try the output format from config.pl
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hits = re.findall(r'\n +([-\w]+) +- ', help_text)
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if hits:
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return hits
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raise Exception("Unable to figure out supported presets. Pass the '-p' option.")
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def list_presets(options):
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"""Return the list of presets to test.
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The list is taken from the command line if present, otherwise it is
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extracted from running the config script with --help.
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"""
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if options.presets:
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return re.split(r'[ ,]+', options.presets)
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else:
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help_text = subprocess.run([options.script, '--help'],
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT).stdout
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return guess_presets_from_help(help_text.decode('ascii'))
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def run_one(options, args, stem_prefix='', input_file=None):
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"""Run the config script with the given arguments.
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Take the original content from input_file if specified, defaulting
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to options.input_file if input_file is None.
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Write the following files, where xxx contains stem_prefix followed by
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a filename-friendly encoding of args:
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* config-xxx.h: modified file.
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* config-xxx.out: standard output.
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* config-xxx.err: standard output.
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* config-xxx.status: exit code.
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Return ("xxx+", "path/to/config-xxx.h") which can be used as
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stem_prefix and input_file to call this function again with new args.
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"""
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if input_file is None:
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input_file = options.input_file
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stem = stem_prefix + '-'.join(args)
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data_filename = output_file_name(options.output_directory, stem, 'h')
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stdout_filename = output_file_name(options.output_directory, stem, 'out')
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stderr_filename = output_file_name(options.output_directory, stem, 'err')
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status_filename = output_file_name(options.output_directory, stem, 'status')
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shutil.copy(input_file, data_filename)
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# Pass only the file basename, not the full path, to avoid getting the
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# directory name in error messages, which would make comparisons
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# between output directories more difficult.
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cmd = [os.path.abspath(options.script),
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'-f', os.path.basename(data_filename)]
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with open(stdout_filename, 'wb') as out:
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with open(stderr_filename, 'wb') as err:
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status = subprocess.call(cmd + args,
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cwd=options.output_directory,
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stdin=subprocess.DEVNULL,
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stdout=out, stderr=err)
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with open(status_filename, 'w') as status_file:
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status_file.write('{}\n'.format(status))
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return stem + "+", data_filename
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### A list of symbols to test with.
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### This script currently tests what happens when you change a symbol from
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### having a value to not having a value or vice versa. This is not
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### necessarily useful behavior, and we may not consider it a bug if
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### config.py stops handling that case correctly.
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TEST_SYMBOLS = [
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'CUSTOM_SYMBOL', # does not exist
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'MBEDTLS_AES_C', # set, no value
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'MBEDTLS_MPI_MAX_SIZE', # unset, has a value
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'MBEDTLS_NO_UDBL_DIVISION', # unset, in "System support"
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'MBEDTLS_PLATFORM_ZEROIZE_ALT', # unset, in "Customisation configuration options"
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]
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def run_all(options):
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"""Run all the command lines to test."""
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presets = list_presets(options)
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for preset in presets:
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run_one(options, [preset])
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for symbol in TEST_SYMBOLS:
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run_one(options, ['get', symbol])
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(stem, filename) = run_one(options, ['set', symbol])
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run_one(options, ['get', symbol], stem_prefix=stem, input_file=filename)
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run_one(options, ['--force', 'set', symbol])
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(stem, filename) = run_one(options, ['set', symbol, 'value'])
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run_one(options, ['get', symbol], stem_prefix=stem, input_file=filename)
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run_one(options, ['--force', 'set', symbol, 'value'])
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run_one(options, ['unset', symbol])
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def main():
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"""Command line entry point."""
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parser = argparse.ArgumentParser(description=__doc__,
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formatter_class=argparse.RawDescriptionHelpFormatter)
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parser.add_argument('-d', metavar='DIR',
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dest='output_directory', required=True,
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help="""Output directory.""")
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parser.add_argument('-f', metavar='FILE',
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dest='input_file', default='include/mbedtls/config.h',
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help="""Config file (default: %(default)s).""")
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parser.add_argument('-p', metavar='PRESET,...',
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dest='presets',
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help="""Presets to test (default: guessed from --help).""")
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parser.add_argument('-s', metavar='FILE',
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dest='script', default='scripts/config.py',
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help="""Configuration script (default: %(default)s).""")
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options = parser.parse_args()
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prepare_directory(options.output_directory)
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run_all(options)
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if __name__ == '__main__':
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main()
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