mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2025-01-09 03:35:40 +00:00
2eae8d7c40
The storage format comparison has a dual purpose: detect format changes that lead to a loss of backward compatibility, and detect loss of test coverage. For loss of backward compatibility, the read tests are the relevant ones. For loss of test coverage, all generated test cases are potentially relevant, but this script currently focuses on storage format (where a loss of test coverage may be a symptom of a loss of backward compatibility). Therefore, storage format test comparison now looks at manually written storage format tests, but only if they're read tests. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
622 lines
25 KiB
Python
Executable file
622 lines
25 KiB
Python
Executable file
#!/usr/bin/env python3
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"""
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Purpose
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This script compares the interfaces of two versions of Mbed TLS, looking
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for backward incompatibilities between two different Git revisions within
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an Mbed TLS repository. It must be run from the root of a Git working tree.
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For the source (API) and runtime (ABI) interface compatibility, this script
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is a small wrapper around the abi-compliance-checker and abi-dumper tools,
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applying them to compare the header and library files.
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For the storage format, this script compares the automatically generated
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storage tests and the manual read tests, and complains if there is a
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reduction in coverage. A change in test data will be signalled as a
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coverage reduction since the old test data is no longer present. A change in
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how test data is presented will be signalled as well; this would be a false
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positive.
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The results of the API/ABI comparison are either formatted as HTML and stored
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at a configurable location, or are given as a brief list of problems.
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Returns 0 on success, 1 on non-compliance, and 2 if there is an error
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while running the script.
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"""
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# Copyright The Mbed TLS Contributors
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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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import glob
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import os
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import re
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import sys
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import traceback
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import shutil
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import subprocess
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import argparse
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import logging
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import tempfile
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import fnmatch
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from types import SimpleNamespace
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import xml.etree.ElementTree as ET
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class AbiChecker:
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"""API and ABI checker."""
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def __init__(self, old_version, new_version, configuration):
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"""Instantiate the API/ABI checker.
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old_version: RepoVersion containing details to compare against
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new_version: RepoVersion containing details to check
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configuration.report_dir: directory for output files
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configuration.keep_all_reports: if false, delete old reports
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configuration.brief: if true, output shorter report to stdout
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configuration.check_api: if true, compare ABIs
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configuration.check_api: if true, compare APIs
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configuration.check_storage: if true, compare storage format tests
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configuration.skip_file: path to file containing symbols and types to skip
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"""
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self.repo_path = "."
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self.log = None
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self.verbose = configuration.verbose
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self._setup_logger()
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self.report_dir = os.path.abspath(configuration.report_dir)
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self.keep_all_reports = configuration.keep_all_reports
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self.can_remove_report_dir = not (os.path.exists(self.report_dir) or
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self.keep_all_reports)
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self.old_version = old_version
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self.new_version = new_version
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self.skip_file = configuration.skip_file
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self.check_abi = configuration.check_abi
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self.check_api = configuration.check_api
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if self.check_abi != self.check_api:
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raise Exception('Checking API without ABI or vice versa is not supported')
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self.check_storage_tests = configuration.check_storage
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self.brief = configuration.brief
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self.git_command = "git"
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self.make_command = "make"
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@staticmethod
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def check_repo_path():
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if not all(os.path.isdir(d) for d in ["include", "library", "tests"]):
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raise Exception("Must be run from Mbed TLS root")
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def _setup_logger(self):
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self.log = logging.getLogger()
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if self.verbose:
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self.log.setLevel(logging.DEBUG)
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else:
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self.log.setLevel(logging.INFO)
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self.log.addHandler(logging.StreamHandler())
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@staticmethod
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def check_abi_tools_are_installed():
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for command in ["abi-dumper", "abi-compliance-checker"]:
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if not shutil.which(command):
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raise Exception("{} not installed, aborting".format(command))
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def _get_clean_worktree_for_git_revision(self, version):
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"""Make a separate worktree with version.revision checked out.
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Do not modify the current worktree."""
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git_worktree_path = tempfile.mkdtemp()
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if version.repository:
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self.log.debug(
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"Checking out git worktree for revision {} from {}".format(
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version.revision, version.repository
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)
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)
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fetch_output = subprocess.check_output(
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[self.git_command, "fetch",
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version.repository, version.revision],
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cwd=self.repo_path,
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stderr=subprocess.STDOUT
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)
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self.log.debug(fetch_output.decode("utf-8"))
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worktree_rev = "FETCH_HEAD"
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else:
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self.log.debug("Checking out git worktree for revision {}".format(
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version.revision
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))
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worktree_rev = version.revision
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worktree_output = subprocess.check_output(
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[self.git_command, "worktree", "add", "--detach",
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git_worktree_path, worktree_rev],
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cwd=self.repo_path,
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stderr=subprocess.STDOUT
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)
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self.log.debug(worktree_output.decode("utf-8"))
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version.commit = subprocess.check_output(
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[self.git_command, "rev-parse", "HEAD"],
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cwd=git_worktree_path,
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stderr=subprocess.STDOUT
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).decode("ascii").rstrip()
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self.log.debug("Commit is {}".format(version.commit))
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return git_worktree_path
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def _update_git_submodules(self, git_worktree_path, version):
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"""If the crypto submodule is present, initialize it.
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if version.crypto_revision exists, update it to that revision,
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otherwise update it to the default revision"""
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update_output = subprocess.check_output(
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[self.git_command, "submodule", "update", "--init", '--recursive'],
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cwd=git_worktree_path,
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stderr=subprocess.STDOUT
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)
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self.log.debug(update_output.decode("utf-8"))
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if not (os.path.exists(os.path.join(git_worktree_path, "crypto"))
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and version.crypto_revision):
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return
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if version.crypto_repository:
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fetch_output = subprocess.check_output(
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[self.git_command, "fetch", version.crypto_repository,
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version.crypto_revision],
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cwd=os.path.join(git_worktree_path, "crypto"),
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stderr=subprocess.STDOUT
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)
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self.log.debug(fetch_output.decode("utf-8"))
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crypto_rev = "FETCH_HEAD"
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else:
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crypto_rev = version.crypto_revision
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checkout_output = subprocess.check_output(
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[self.git_command, "checkout", crypto_rev],
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cwd=os.path.join(git_worktree_path, "crypto"),
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stderr=subprocess.STDOUT
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)
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self.log.debug(checkout_output.decode("utf-8"))
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def _build_shared_libraries(self, git_worktree_path, version):
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"""Build the shared libraries in the specified worktree."""
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my_environment = os.environ.copy()
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my_environment["CFLAGS"] = "-g -Og"
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my_environment["SHARED"] = "1"
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if os.path.exists(os.path.join(git_worktree_path, "crypto")):
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my_environment["USE_CRYPTO_SUBMODULE"] = "1"
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make_output = subprocess.check_output(
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[self.make_command, "lib"],
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env=my_environment,
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cwd=git_worktree_path,
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stderr=subprocess.STDOUT
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)
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self.log.debug(make_output.decode("utf-8"))
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for root, _dirs, files in os.walk(git_worktree_path):
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for file in fnmatch.filter(files, "*.so"):
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version.modules[os.path.splitext(file)[0]] = (
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os.path.join(root, file)
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)
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@staticmethod
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def _pretty_revision(version):
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if version.revision == version.commit:
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return version.revision
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else:
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return "{} ({})".format(version.revision, version.commit)
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def _get_abi_dumps_from_shared_libraries(self, version):
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"""Generate the ABI dumps for the specified git revision.
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The shared libraries must have been built and the module paths
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present in version.modules."""
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for mbed_module, module_path in version.modules.items():
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output_path = os.path.join(
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self.report_dir, "{}-{}-{}.dump".format(
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mbed_module, version.revision, version.version
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)
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)
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abi_dump_command = [
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"abi-dumper",
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module_path,
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"-o", output_path,
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"-lver", self._pretty_revision(version),
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]
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abi_dump_output = subprocess.check_output(
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abi_dump_command,
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stderr=subprocess.STDOUT
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)
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self.log.debug(abi_dump_output.decode("utf-8"))
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version.abi_dumps[mbed_module] = output_path
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@staticmethod
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def _normalize_storage_test_case_data(line):
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"""Eliminate cosmetic or irrelevant details in storage format test cases."""
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line = re.sub(r'\s+', r'', line)
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return line
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def _read_storage_tests(self,
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directory,
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filename,
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is_generated,
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storage_tests):
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"""Record storage tests from the given file.
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Populate the storage_tests dictionary with test cases read from
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filename under directory.
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"""
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at_paragraph_start = True
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description = None
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full_path = os.path.join(directory, filename)
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for line_number, line in enumerate(open(full_path), 1):
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line = line.strip()
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if not line:
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at_paragraph_start = True
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continue
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if line.startswith('#'):
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continue
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if at_paragraph_start:
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description = line.strip()
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at_paragraph_start = False
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continue
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if line.startswith('depends_on:'):
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continue
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# We've reached a test case data line
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test_case_data = self._normalize_storage_test_case_data(line)
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if not is_generated:
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# In manual test data, only look at read tests.
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function_name = test_case_data.split(':', 1)[0]
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if 'read' not in function_name.split('_'):
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continue
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metadata = SimpleNamespace(
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filename=filename,
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line_number=line_number,
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description=description
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)
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storage_tests[test_case_data] = metadata
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@staticmethod
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def _list_generated_test_data_files(git_worktree_path):
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"""List the generated test data files."""
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output = subprocess.check_output(
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['tests/scripts/generate_psa_tests.py', '--list'],
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cwd=git_worktree_path,
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).decode('ascii')
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return [line for line in output.split('\n') if line]
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def _get_storage_format_tests(self, version, git_worktree_path):
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"""Record the storage format tests for the specified git version.
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The storage format tests are the test suite data files whose name
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contains "storage_format".
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The version must be checked out at git_worktree_path.
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This function creates or updates the generated data files.
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"""
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# Existing test data files. This may be missing some automatically
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# generated files if they haven't been generated yet.
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storage_data_files = set(glob.glob(
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'tests/suites/test_suite_*storage_format*.data'
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))
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# Discover and (re)generate automatically generated data files.
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to_be_generated = set()
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for filename in self._list_generated_test_data_files(git_worktree_path):
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if 'storage_format' in filename:
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storage_data_files.add(filename)
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to_be_generated.add(filename)
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subprocess.check_call(
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['tests/scripts/generate_psa_tests.py'] + sorted(to_be_generated),
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cwd=git_worktree_path,
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)
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for test_file in sorted(storage_data_files):
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self._read_storage_tests(git_worktree_path,
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test_file,
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test_file in to_be_generated,
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version.storage_tests)
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def _cleanup_worktree(self, git_worktree_path):
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"""Remove the specified git worktree."""
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shutil.rmtree(git_worktree_path)
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worktree_output = subprocess.check_output(
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[self.git_command, "worktree", "prune"],
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cwd=self.repo_path,
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stderr=subprocess.STDOUT
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)
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self.log.debug(worktree_output.decode("utf-8"))
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def _get_abi_dump_for_ref(self, version):
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"""Generate the interface information for the specified git revision."""
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git_worktree_path = self._get_clean_worktree_for_git_revision(version)
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self._update_git_submodules(git_worktree_path, version)
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if self.check_abi:
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self._build_shared_libraries(git_worktree_path, version)
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self._get_abi_dumps_from_shared_libraries(version)
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if self.check_storage_tests:
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self._get_storage_format_tests(version, git_worktree_path)
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self._cleanup_worktree(git_worktree_path)
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def _remove_children_with_tag(self, parent, tag):
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children = parent.getchildren()
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for child in children:
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if child.tag == tag:
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parent.remove(child)
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else:
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self._remove_children_with_tag(child, tag)
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def _remove_extra_detail_from_report(self, report_root):
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for tag in ['test_info', 'test_results', 'problem_summary',
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'added_symbols', 'affected']:
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self._remove_children_with_tag(report_root, tag)
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for report in report_root:
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for problems in report.getchildren()[:]:
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if not problems.getchildren():
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report.remove(problems)
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def _abi_compliance_command(self, mbed_module, output_path):
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"""Build the command to run to analyze the library mbed_module.
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The report will be placed in output_path."""
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abi_compliance_command = [
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"abi-compliance-checker",
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"-l", mbed_module,
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"-old", self.old_version.abi_dumps[mbed_module],
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"-new", self.new_version.abi_dumps[mbed_module],
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"-strict",
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"-report-path", output_path,
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]
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if self.skip_file:
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abi_compliance_command += ["-skip-symbols", self.skip_file,
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"-skip-types", self.skip_file]
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if self.brief:
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abi_compliance_command += ["-report-format", "xml",
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"-stdout"]
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return abi_compliance_command
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def _is_library_compatible(self, mbed_module, compatibility_report):
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"""Test if the library mbed_module has remained compatible.
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Append a message regarding compatibility to compatibility_report."""
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output_path = os.path.join(
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self.report_dir, "{}-{}-{}.html".format(
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mbed_module, self.old_version.revision,
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self.new_version.revision
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)
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)
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try:
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subprocess.check_output(
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self._abi_compliance_command(mbed_module, output_path),
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stderr=subprocess.STDOUT
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)
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except subprocess.CalledProcessError as err:
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if err.returncode != 1:
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raise err
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if self.brief:
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self.log.info(
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"Compatibility issues found for {}".format(mbed_module)
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)
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report_root = ET.fromstring(err.output.decode("utf-8"))
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self._remove_extra_detail_from_report(report_root)
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self.log.info(ET.tostring(report_root).decode("utf-8"))
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else:
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self.can_remove_report_dir = False
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compatibility_report.append(
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"Compatibility issues found for {}, "
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"for details see {}".format(mbed_module, output_path)
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)
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return False
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compatibility_report.append(
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"No compatibility issues for {}".format(mbed_module)
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)
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if not (self.keep_all_reports or self.brief):
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os.remove(output_path)
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return True
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@staticmethod
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def _is_storage_format_compatible(old_tests, new_tests,
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compatibility_report):
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"""Check whether all tests present in old_tests are also in new_tests.
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Append a message regarding compatibility to compatibility_report.
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"""
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missing = frozenset(old_tests.keys()).difference(new_tests.keys())
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for test_data in sorted(missing):
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metadata = old_tests[test_data]
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compatibility_report.append(
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'Test case from {} line {} "{}" has disappeared: {}'.format(
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metadata.filename, metadata.line_number,
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metadata.description, test_data
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)
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)
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compatibility_report.append(
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'FAIL: {}/{} storage format test cases have changed or disappeared.'.format(
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len(missing), len(old_tests)
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) if missing else
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'PASS: All {} storage format test cases are preserved.'.format(
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len(old_tests)
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)
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)
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compatibility_report.append(
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'Info: number of storage format tests cases: {} -> {}.'.format(
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len(old_tests), len(new_tests)
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)
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)
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return not missing
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def get_abi_compatibility_report(self):
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"""Generate a report of the differences between the reference ABI
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and the new ABI. ABI dumps from self.old_version and self.new_version
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must be available."""
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compatibility_report = ["Checking evolution from {} to {}".format(
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self._pretty_revision(self.old_version),
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self._pretty_revision(self.new_version)
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)]
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compliance_return_code = 0
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if self.check_abi:
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shared_modules = list(set(self.old_version.modules.keys()) &
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set(self.new_version.modules.keys()))
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for mbed_module in shared_modules:
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if not self._is_library_compatible(mbed_module,
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compatibility_report):
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compliance_return_code = 1
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if self.check_storage_tests:
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if not self._is_storage_format_compatible(
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self.old_version.storage_tests,
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self.new_version.storage_tests,
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compatibility_report):
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compliance_return_code = 1
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for version in [self.old_version, self.new_version]:
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for mbed_module, mbed_module_dump in version.abi_dumps.items():
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os.remove(mbed_module_dump)
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if self.can_remove_report_dir:
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os.rmdir(self.report_dir)
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self.log.info("\n".join(compatibility_report))
|
|
return compliance_return_code
|
|
|
|
def check_for_abi_changes(self):
|
|
"""Generate a report of ABI differences
|
|
between self.old_rev and self.new_rev."""
|
|
self.check_repo_path()
|
|
self.check_abi_tools_are_installed()
|
|
self._get_abi_dump_for_ref(self.old_version)
|
|
self._get_abi_dump_for_ref(self.new_version)
|
|
return self.get_abi_compatibility_report()
|
|
|
|
|
|
def run_main():
|
|
try:
|
|
parser = argparse.ArgumentParser(
|
|
description=(
|
|
"""This script is a small wrapper around the
|
|
abi-compliance-checker and abi-dumper tools, applying them
|
|
to compare the ABI and API of the library files from two
|
|
different Git revisions within an Mbed TLS repository.
|
|
The results of the comparison are either formatted as HTML and
|
|
stored at a configurable location, or are given as a brief list
|
|
of problems. Returns 0 on success, 1 on ABI/API non-compliance,
|
|
and 2 if there is an error while running the script.
|
|
Note: must be run from Mbed TLS root."""
|
|
)
|
|
)
|
|
parser.add_argument(
|
|
"-v", "--verbose", action="store_true",
|
|
help="set verbosity level",
|
|
)
|
|
parser.add_argument(
|
|
"-r", "--report-dir", type=str, default="reports",
|
|
help="directory where reports are stored, default is reports",
|
|
)
|
|
parser.add_argument(
|
|
"-k", "--keep-all-reports", action="store_true",
|
|
help="keep all reports, even if there are no compatibility issues",
|
|
)
|
|
parser.add_argument(
|
|
"-o", "--old-rev", type=str, help="revision for old version.",
|
|
required=True,
|
|
)
|
|
parser.add_argument(
|
|
"-or", "--old-repo", type=str, help="repository for old version."
|
|
)
|
|
parser.add_argument(
|
|
"-oc", "--old-crypto-rev", type=str,
|
|
help="revision for old crypto submodule."
|
|
)
|
|
parser.add_argument(
|
|
"-ocr", "--old-crypto-repo", type=str,
|
|
help="repository for old crypto submodule."
|
|
)
|
|
parser.add_argument(
|
|
"-n", "--new-rev", type=str, help="revision for new version",
|
|
required=True,
|
|
)
|
|
parser.add_argument(
|
|
"-nr", "--new-repo", type=str, help="repository for new version."
|
|
)
|
|
parser.add_argument(
|
|
"-nc", "--new-crypto-rev", type=str,
|
|
help="revision for new crypto version"
|
|
)
|
|
parser.add_argument(
|
|
"-ncr", "--new-crypto-repo", type=str,
|
|
help="repository for new crypto submodule."
|
|
)
|
|
parser.add_argument(
|
|
"-s", "--skip-file", type=str,
|
|
help=("path to file containing symbols and types to skip "
|
|
"(typically \"-s identifiers\" after running "
|
|
"\"tests/scripts/list-identifiers.sh --internal\")")
|
|
)
|
|
parser.add_argument(
|
|
"--check-abi",
|
|
action='store_true', default=True,
|
|
help="Perform ABI comparison (default: yes)"
|
|
)
|
|
parser.add_argument("--no-check-abi", action='store_false', dest='check_abi')
|
|
parser.add_argument(
|
|
"--check-api",
|
|
action='store_true', default=True,
|
|
help="Perform API comparison (default: yes)"
|
|
)
|
|
parser.add_argument("--no-check-api", action='store_false', dest='check_api')
|
|
parser.add_argument(
|
|
"--check-storage",
|
|
action='store_true', default=True,
|
|
help="Perform storage tests comparison (default: yes)"
|
|
)
|
|
parser.add_argument("--no-check-storage", action='store_false', dest='check_storage')
|
|
parser.add_argument(
|
|
"-b", "--brief", action="store_true",
|
|
help="output only the list of issues to stdout, instead of a full report",
|
|
)
|
|
abi_args = parser.parse_args()
|
|
if os.path.isfile(abi_args.report_dir):
|
|
print("Error: {} is not a directory".format(abi_args.report_dir))
|
|
parser.exit()
|
|
old_version = SimpleNamespace(
|
|
version="old",
|
|
repository=abi_args.old_repo,
|
|
revision=abi_args.old_rev,
|
|
commit=None,
|
|
crypto_repository=abi_args.old_crypto_repo,
|
|
crypto_revision=abi_args.old_crypto_rev,
|
|
abi_dumps={},
|
|
storage_tests={},
|
|
modules={}
|
|
)
|
|
new_version = SimpleNamespace(
|
|
version="new",
|
|
repository=abi_args.new_repo,
|
|
revision=abi_args.new_rev,
|
|
commit=None,
|
|
crypto_repository=abi_args.new_crypto_repo,
|
|
crypto_revision=abi_args.new_crypto_rev,
|
|
abi_dumps={},
|
|
storage_tests={},
|
|
modules={}
|
|
)
|
|
configuration = SimpleNamespace(
|
|
verbose=abi_args.verbose,
|
|
report_dir=abi_args.report_dir,
|
|
keep_all_reports=abi_args.keep_all_reports,
|
|
brief=abi_args.brief,
|
|
check_abi=abi_args.check_abi,
|
|
check_api=abi_args.check_api,
|
|
check_storage=abi_args.check_storage,
|
|
skip_file=abi_args.skip_file
|
|
)
|
|
abi_check = AbiChecker(old_version, new_version, configuration)
|
|
return_code = abi_check.check_for_abi_changes()
|
|
sys.exit(return_code)
|
|
except Exception: # pylint: disable=broad-except
|
|
# Print the backtrace and exit explicitly so as to exit with
|
|
# status 2, not 1.
|
|
traceback.print_exc()
|
|
sys.exit(2)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
run_main()
|