| #!/usr/bin/env python |
| # Copyright (c) 2015 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| |
| """Run the given command through LLVM's coverage tools.""" |
| |
| |
| import argparse |
| import json |
| import os |
| import shlex |
| import subprocess |
| import sys |
| |
| |
| BUILDTYPE = 'Coverage' |
| OUT_DIR = os.path.realpath(os.path.join('out', BUILDTYPE)) |
| PROFILE_DATA = 'default.profraw' |
| PROFILE_DATA_MERGED = 'prof_merged' |
| |
| |
| def _fix_filename(filename): |
| """Return a filename which we can use to identify the file. |
| |
| The file paths printed by llvm-cov take the form: |
| |
| /path/to/repo/out/dir/../../src/filename.cpp |
| |
| And then they're truncated to 22 characters with leading ellipses: |
| |
| ...../../src/filename.cpp |
| |
| This makes it really tough to determine whether the file actually belongs in |
| the Skia repo. This function strips out the leading junk so that, if the file |
| exists in the repo, the returned string matches the end of some relative path |
| in the repo. This doesn't guarantee correctness, but it's about as close as |
| we can get. |
| """ |
| return filename.split('..')[-1].lstrip('./') |
| |
| |
| def _filter_results(results): |
| """Filter out any results for files not in the Skia repo. |
| |
| We run through the list of checked-in files and determine whether each file |
| belongs in the repo. Unfortunately, llvm-cov leaves us with fragments of the |
| file paths, so we can't guarantee accuracy. See the docstring for |
| _fix_filename for more details. |
| """ |
| all_files = subprocess.check_output(['git', 'ls-files']).splitlines() |
| filtered = [] |
| for percent, filename in results: |
| new_file = _fix_filename(filename) |
| matched = [] |
| for f in all_files: |
| if f.endswith(new_file): |
| matched.append(f) |
| if len(matched) == 1: |
| filtered.append((percent, matched[0])) |
| elif len(matched) > 1: |
| print >> sys.stderr, ('WARNING: multiple matches for %s; skipping:\n\t%s' |
| % (new_file, '\n\t'.join(matched))) |
| print 'Filtered out %d files.' % (len(results) - len(filtered)) |
| return filtered |
| |
| |
| def run_coverage(cmd): |
| """Run the given command and return per-file coverage data. |
| |
| Assumes that the binary has been built using llvm_coverage_build and that |
| LLVM 3.6 or newer is installed. |
| """ |
| binary_path = os.path.join(OUT_DIR, cmd[0]) |
| subprocess.call([binary_path] + cmd[1:]) |
| try: |
| subprocess.check_call( |
| ['llvm-profdata', 'merge', PROFILE_DATA, |
| '-output=%s' % PROFILE_DATA_MERGED]) |
| finally: |
| os.remove(PROFILE_DATA) |
| try: |
| report = subprocess.check_output( |
| ['llvm-cov', 'report', '-instr-profile', PROFILE_DATA_MERGED, |
| binary_path]) |
| finally: |
| os.remove(PROFILE_DATA_MERGED) |
| results = [] |
| for line in report.splitlines()[2:-2]: |
| filename, _, _, cover, _, _ = shlex.split(line) |
| percent = float(cover.split('%')[0]) |
| results.append((percent, filename)) |
| results = _filter_results(results) |
| results.sort() |
| return results |
| |
| |
| def main(): |
| res = run_coverage(sys.argv[1:]) |
| print '% Covered\tFilename' |
| for percent, f in res: |
| print '%f\t%s' % (percent, f) |
| |
| |
| if __name__ == '__main__': |
| main() |