406 lines
16 KiB
Python
Executable file
406 lines
16 KiB
Python
Executable file
#!/usr/bin/env python3
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"""
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This file is part of Mbed TLS (https://tls.mbed.org)
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Copyright (c) 2018, Arm Limited, All Rights Reserved
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Purpose
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This script is a small wrapper around the abi-compliance-checker and
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abi-dumper tools, applying them to compare the ABI and API of the library
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files from two different Git revisions within an Mbed TLS repository.
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The results of the comparison are either formatted as HTML and stored at
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a configurable location, or are given as a brief list of problems.
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Returns 0 on success, 1 on ABI/API non-compliance, and 2 if there is an error
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while running the script. Note: must be run from Mbed TLS root.
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"""
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import os
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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(object):
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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.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.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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current_dir = os.path.realpath('.')
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root_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
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if current_dir != root_dir:
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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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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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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", version.revision
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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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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 ABI dumps 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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self._build_shared_libraries(git_worktree_path, version)
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self._get_abi_dumps_from_shared_libraries(version)
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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 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 = ""
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compliance_return_code = 0
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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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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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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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try:
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subprocess.check_output(
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abi_compliance_command,
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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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compliance_return_code = 1
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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 += (
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"Compatibility issues found for {}, "
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"for details see {}\n".format(mbed_module, output_path)
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)
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else:
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raise err
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else:
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compatibility_report += (
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"No compatibility issues for {}\n".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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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(compatibility_report)
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return compliance_return_code
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def check_for_abi_changes(self):
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"""Generate a report of ABI differences
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between self.old_rev and self.new_rev."""
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self.check_repo_path()
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self.check_abi_tools_are_installed()
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self._get_abi_dump_for_ref(self.old_version)
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self._get_abi_dump_for_ref(self.new_version)
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return self.get_abi_compatibility_report()
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def run_main():
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try:
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parser = argparse.ArgumentParser(
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description=(
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"""This script is a small wrapper around the
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abi-compliance-checker and abi-dumper tools, applying them
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to compare the ABI and API of the library files from two
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different Git revisions within an Mbed TLS repository.
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The results of the comparison are either formatted as HTML and
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stored at a configurable location, or are given as a brief list
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of problems. Returns 0 on success, 1 on ABI/API non-compliance,
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and 2 if there is an error while running the script.
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Note: must be run from Mbed TLS root."""
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)
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)
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parser.add_argument(
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"-v", "--verbose", action="store_true",
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help="set verbosity level",
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)
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parser.add_argument(
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"-r", "--report-dir", type=str, default="reports",
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help="directory where reports are stored, default is reports",
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)
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parser.add_argument(
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"-k", "--keep-all-reports", action="store_true",
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help="keep all reports, even if there are no compatibility issues",
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)
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parser.add_argument(
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"-o", "--old-rev", type=str, help="revision for old version.",
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required=True,
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)
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parser.add_argument(
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"-or", "--old-repo", type=str, help="repository for old version."
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)
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parser.add_argument(
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"-oc", "--old-crypto-rev", type=str,
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help="revision for old crypto submodule."
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)
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parser.add_argument(
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"-ocr", "--old-crypto-repo", type=str,
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help="repository for old crypto submodule."
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)
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parser.add_argument(
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"-n", "--new-rev", type=str, help="revision for new version",
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required=True,
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)
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parser.add_argument(
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"-nr", "--new-repo", type=str, help="repository for new version."
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)
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parser.add_argument(
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"-nc", "--new-crypto-rev", type=str,
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help="revision for new crypto version"
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)
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parser.add_argument(
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"-ncr", "--new-crypto-repo", type=str,
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help="repository for new crypto submodule."
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)
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parser.add_argument(
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"-s", "--skip-file", type=str,
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help="path to file containing symbols and types to skip"
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)
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parser.add_argument(
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"-b", "--brief", action="store_true",
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help="output only the list of issues to stdout, instead of a full report",
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)
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abi_args = parser.parse_args()
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if os.path.isfile(abi_args.report_dir):
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print("Error: {} is not a directory".format(abi_args.report_dir))
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parser.exit()
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old_version = SimpleNamespace(
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version="old",
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repository=abi_args.old_repo,
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revision=abi_args.old_rev,
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crypto_repository=abi_args.old_crypto_repo,
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crypto_revision=abi_args.old_crypto_rev,
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abi_dumps={},
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modules={}
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)
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new_version = SimpleNamespace(
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version="new",
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repository=abi_args.new_repo,
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revision=abi_args.new_rev,
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crypto_repository=abi_args.new_crypto_repo,
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crypto_revision=abi_args.new_crypto_rev,
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abi_dumps={},
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modules={}
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)
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configuration = SimpleNamespace(
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verbose=abi_args.verbose,
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report_dir=abi_args.report_dir,
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keep_all_reports=abi_args.keep_all_reports,
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brief=abi_args.brief,
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skip_file=abi_args.skip_file
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)
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abi_check = AbiChecker(old_version, new_version, configuration)
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return_code = abi_check.check_for_abi_changes()
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sys.exit(return_code)
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except Exception: # pylint: disable=broad-except
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# Print the backtrace and exit explicitly so as to exit with
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# status 2, not 1.
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traceback.print_exc()
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sys.exit(2)
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if __name__ == "__main__":
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run_main()
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