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#!/usr/bin/env python3
"""Describe the test coverage of PSA functions in terms of return statuses.
1. Build Mbed Crypto with -DRECORD_PSA_STATUS_COVERAGE_LOG
2. Run psa_collect_statuses.py
The output is a series of line of the form "psa_foo PSA_ERROR_XXX". Each
function/status combination appears only once.
This script must be run from the top of an Mbed Crypto source tree.
The build command is "make -DRECORD_PSA_STATUS_COVERAGE_LOG", which is
only supported with make (as opposed to CMake or other build methods).
"""
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import argparse
import os
import subprocess
import sys
DEFAULT_STATUS_LOG_FILE = 'tests/statuses.log'
DEFAULT_PSA_CONSTANT_NAMES = 'programs/psa/psa_constant_names'
class Statuses:
"""Information about observed return statues of API functions."""
def __init__(self):
self.functions = {}
self.codes = set()
self.status_names = {}
def collect_log(self, log_file_name):
"""Read logs from RECORD_PSA_STATUS_COVERAGE_LOG.
Read logs produced by running Mbed Crypto test suites built with
-DRECORD_PSA_STATUS_COVERAGE_LOG.
"""
with open(log_file_name) as log:
for line in log:
value, function, tail = line.split(':', 2)
if function not in self.functions:
self.functions[function] = {}
fdata = self.functions[function]
if value not in self.functions[function]:
fdata[value] = []
fdata[value].append(tail)
self.codes.add(int(value))
def get_constant_names(self, psa_constant_names):
"""Run psa_constant_names to obtain names for observed numerical values."""
values = [str(value) for value in self.codes]
cmd = [psa_constant_names, 'status'] + values
output = subprocess.check_output(cmd).decode('ascii')
for value, name in zip(values, output.rstrip().split('\n')):
self.status_names[value] = name
def report(self):
"""Report observed return values for each function.
The report is a series of line of the form "psa_foo PSA_ERROR_XXX".
"""
for function in sorted(self.functions.keys()):
fdata = self.functions[function]
names = [self.status_names[value] for value in fdata.keys()]
for name in sorted(names):
sys.stdout.write('{} {}\n'.format(function, name))
def collect_status_logs(options):
"""Build and run unit tests and report observed function return statuses.
Build Mbed Crypto with -DRECORD_PSA_STATUS_COVERAGE_LOG, run the
test suites and display information about observed return statuses.
"""
rebuilt = False
if not options.use_existing_log and os.path.exists(options.log_file):
os.remove(options.log_file)
if not os.path.exists(options.log_file):
if options.clean_before:
subprocess.check_call(['make', 'clean'],
cwd='tests',
stdout=sys.stderr)
with open(os.devnull, 'w') as devnull:
make_q_ret = subprocess.call(['make', '-q', 'lib', 'tests'],
stdout=devnull, stderr=devnull)
if make_q_ret != 0:
subprocess.check_call(['make', 'RECORD_PSA_STATUS_COVERAGE_LOG=1'],
stdout=sys.stderr)
rebuilt = True
subprocess.check_call(['make', 'test'],
stdout=sys.stderr)
data = Statuses()
data.collect_log(options.log_file)
data.get_constant_names(options.psa_constant_names)
if rebuilt and options.clean_after:
subprocess.check_call(['make', 'clean'],
cwd='tests',
stdout=sys.stderr)
return data
def main():
parser = argparse.ArgumentParser(description=globals()['__doc__'])
parser.add_argument('--clean-after',
action='store_true',
help='Run "make clean" after rebuilding')
parser.add_argument('--clean-before',
action='store_true',
help='Run "make clean" before regenerating the log file)')
parser.add_argument('--log-file', metavar='FILE',
default=DEFAULT_STATUS_LOG_FILE,
help='Log file location (default: {})'.format(
DEFAULT_STATUS_LOG_FILE
))
parser.add_argument('--psa-constant-names', metavar='PROGRAM',
default=DEFAULT_PSA_CONSTANT_NAMES,
help='Path to psa_constant_names (default: {})'.format(
DEFAULT_PSA_CONSTANT_NAMES
))
parser.add_argument('--use-existing-log', '-e',
action='store_true',
help='Don\'t regenerate the log file if it exists')
options = parser.parse_args()
data = collect_status_logs(options)
data.report()
if __name__ == '__main__':
main()
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