| #!/usr/bin/env python3 |
| |
| """ |
| Purpose |
| |
| This script is for comparing the size of the library files from two |
| different Git revisions within an Mbed TLS repository. |
| The results of the comparison is formatted as csv and stored at a |
| configurable location. |
| Note: must be run from Mbed TLS root. |
| """ |
| |
| # 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 |
| |
| from mbedtls_dev import build_tree |
| |
| |
| class CodeSizeComparison: |
| """Compare code size between two Git revisions.""" |
| |
| def __init__(self, old_revision, new_revision, result_dir): |
| """ |
| old_revision: revision to compare against |
| new_revision: |
| result_dir: directory for comparison result |
| """ |
| self.repo_path = "." |
| self.result_dir = os.path.abspath(result_dir) |
| os.makedirs(self.result_dir, exist_ok=True) |
| |
| self.csv_dir = os.path.abspath("code_size_records/") |
| os.makedirs(self.csv_dir, exist_ok=True) |
| |
| self.old_rev = old_revision |
| self.new_rev = new_revision |
| self.git_command = "git" |
| self.make_command = "make" |
| |
| @staticmethod |
| def validate_revision(revision): |
| result = subprocess.check_output(["git", "rev-parse", "--verify", |
| revision + "^{commit}"], shell=False) |
| return result |
| |
| def _create_git_worktree(self, revision): |
| """Make a separate worktree for revision. |
| Do not modify the current worktree.""" |
| |
| if revision == "current": |
| print("Using current work directory.") |
| git_worktree_path = self.repo_path |
| else: |
| print("Creating git worktree for", revision) |
| git_worktree_path = os.path.join(self.repo_path, "temp-" + revision) |
| subprocess.check_output( |
| [self.git_command, "worktree", "add", "--detach", |
| git_worktree_path, revision], cwd=self.repo_path, |
| stderr=subprocess.STDOUT |
| ) |
| return git_worktree_path |
| |
| def _build_libraries(self, git_worktree_path): |
| """Build libraries in the specified worktree.""" |
| |
| my_environment = os.environ.copy() |
| subprocess.check_output( |
| [self.make_command, "-j", "lib"], env=my_environment, |
| cwd=git_worktree_path, stderr=subprocess.STDOUT, |
| ) |
| |
| def _gen_code_size_csv(self, revision, git_worktree_path): |
| """Generate code size csv file.""" |
| |
| csv_fname = revision + ".csv" |
| if revision == "current": |
| print("Measuring code size in current work directory.") |
| else: |
| print("Measuring code size for", revision) |
| result = subprocess.check_output( |
| ["size library/*.o"], cwd=git_worktree_path, shell=True |
| ) |
| size_text = result.decode() |
| csv_file = open(os.path.join(self.csv_dir, csv_fname), "w") |
| for line in size_text.splitlines()[1:]: |
| data = line.split() |
| csv_file.write("{}, {}\n".format(data[5], data[3])) |
| |
| def _remove_worktree(self, git_worktree_path): |
| """Remove temporary worktree.""" |
| if git_worktree_path != self.repo_path: |
| print("Removing temporary worktree", git_worktree_path) |
| subprocess.check_output( |
| [self.git_command, "worktree", "remove", "--force", |
| git_worktree_path], cwd=self.repo_path, |
| stderr=subprocess.STDOUT |
| ) |
| |
| def _get_code_size_for_rev(self, revision): |
| """Generate code size csv file for the specified git revision.""" |
| |
| # Check if the corresponding record exists |
| csv_fname = revision + ".csv" |
| if (revision != "current") and \ |
| os.path.exists(os.path.join(self.csv_dir, csv_fname)): |
| print("Code size csv file for", revision, "already exists.") |
| else: |
| git_worktree_path = self._create_git_worktree(revision) |
| self._build_libraries(git_worktree_path) |
| self._gen_code_size_csv(revision, git_worktree_path) |
| self._remove_worktree(git_worktree_path) |
| |
| def compare_code_size(self): |
| """Generate results of the size changes between two revisions, |
| old and new. Measured code size results of these two revisions |
| must be available.""" |
| |
| old_file = open(os.path.join(self.csv_dir, self.old_rev + ".csv"), "r") |
| new_file = open(os.path.join(self.csv_dir, self.new_rev + ".csv"), "r") |
| res_file = open(os.path.join(self.result_dir, "compare-" + self.old_rev |
| + "-" + self.new_rev + ".csv"), "w") |
| |
| res_file.write("file_name, this_size, old_size, change, change %\n") |
| print("Generating comparison results.") |
| |
| old_ds = {} |
| for line in old_file.readlines()[1:]: |
| cols = line.split(", ") |
| fname = cols[0] |
| size = int(cols[1]) |
| if size != 0: |
| old_ds[fname] = size |
| |
| new_ds = {} |
| for line in new_file.readlines()[1:]: |
| cols = line.split(", ") |
| fname = cols[0] |
| size = int(cols[1]) |
| new_ds[fname] = size |
| |
| for fname in new_ds: |
| this_size = new_ds[fname] |
| if fname in old_ds: |
| old_size = old_ds[fname] |
| change = this_size - old_size |
| change_pct = change / old_size |
| res_file.write("{}, {}, {}, {}, {:.2%}\n".format(fname, \ |
| this_size, old_size, change, float(change_pct))) |
| else: |
| res_file.write("{}, {}\n".format(fname, this_size)) |
| return 0 |
| |
| def get_comparision_results(self): |
| """Compare size of library/*.o between self.old_rev and self.new_rev, |
| and generate the result file.""" |
| build_tree.check_repo_path() |
| self._get_code_size_for_rev(self.old_rev) |
| self._get_code_size_for_rev(self.new_rev) |
| return self.compare_code_size() |
| |
| def main(): |
| parser = argparse.ArgumentParser( |
| description=( |
| """This script is for comparing the size of the library files |
| from two different Git revisions within an Mbed TLS repository. |
| The results of the comparison is formatted as csv, and stored at |
| a configurable location. |
| Note: must be run from Mbed TLS root.""" |
| ) |
| ) |
| parser.add_argument( |
| "-r", "--result-dir", type=str, default="comparison", |
| help="directory where comparison result is stored, \ |
| default is comparison", |
| ) |
| parser.add_argument( |
| "-o", "--old-rev", type=str, help="old revision for comparison.", |
| required=True, |
| ) |
| parser.add_argument( |
| "-n", "--new-rev", type=str, default=None, |
| help="new revision for comparison, default is the current work \ |
| directory, including uncommitted changes." |
| ) |
| comp_args = parser.parse_args() |
| |
| if os.path.isfile(comp_args.result_dir): |
| print("Error: {} is not a directory".format(comp_args.result_dir)) |
| parser.exit() |
| |
| validate_res = CodeSizeComparison.validate_revision(comp_args.old_rev) |
| old_revision = validate_res.decode().replace("\n", "") |
| |
| if comp_args.new_rev is not None: |
| validate_res = CodeSizeComparison.validate_revision(comp_args.new_rev) |
| new_revision = validate_res.decode().replace("\n", "") |
| else: |
| new_revision = "current" |
| |
| result_dir = comp_args.result_dir |
| size_compare = CodeSizeComparison(old_revision, new_revision, result_dir) |
| return_code = size_compare.get_comparision_results() |
| sys.exit(return_code) |
| |
| |
| if __name__ == "__main__": |
| main() |
