def record_stats(self):
"""Use fuzzer.get_stats if it is offered, validate the stats and then
save them to a file so that they will be synced to the filestore."""
# TODO(metzman): Make this more resilient so we don't wait forever and
# so that breakages in stats parsing doesn't break runner.
fuzzer_module = get_fuzzer_module(self.fuzzer)
fuzzer_module_get_stats = getattr(fuzzer_module, 'get_stats', None)
if fuzzer_module_get_stats is None:
# Stats support is optional.
return
try:
output_corpus = environment.get('OUTPUT_CORPUS_DIR')
stats_json_str = fuzzer_module_get_stats(output_corpus,
self.log_file)
except Exception: # pylint: disable=broad-except
logs.error('Call to %d failed.', fuzzer_module_get_stats)
return
try:
fuzzer_stats.validate_fuzzer_stats(stats_json_str)
except (ValueError, json.decoder.JSONDecodeError):
logs.error('Stats are invalid.')
return
stats_filename = experiment_utils.get_stats_filename(self.cycle)
stats_path = os.path.join(self.results_dir, stats_filename)
with open(stats_path, 'w') as stats_file_handle:
stats_file_handle.write(stats_json_str)
def get_fuzzer_stats(stats_filestore_path):
"""Reads, validates and returns the stats in |stats_filestore_path|."""
with tempfile.NamedTemporaryFile() as temp_file:
result = filestore_utils.cp(stats_filestore_path,
temp_file.name,
expect_zero=False)
if result.retcode != 0:
return None
stats_str = temp_file.read()
fuzzer_stats.validate_fuzzer_stats(stats_str)
return json.loads(stats_str)