def test_set_stats_invalid_file(self):
"""Tests that all stats are set properly by set_stats() when stats_getter
is *not* given a valid fuzzer_stats file.
"""
expected_stats = {
'actual_duration': 5,
'average_exec_per_sec': 0,
'bad_instrumentation': 0,
'corpus_crash_count': 0,
'corpus_size': 20,
'crash_count': 0,
'dict_used': 1,
'log_lines_unwanted': 0,
'manual_dict_size': 3,
'new_units_added': 1,
'new_units_generated': 2,
'stability': 0.0,
'startup_crash_count': 0,
'timeout_count': 0,
'timeout_limit': 0,
}
self.stats_getter = stats.StatsGetter(self.fuzzer_stats_invalid_path,
self.dict_path)
actual_stats = self._set_stats()
self.assertEqual(actual_stats, expected_stats)
def test_set_stats_no_file(self):
"""Tests that set_stats() sets the correct stats or uses default stats when
there is no fuzzer_stats file."""
fuzzer_stats_path = self.fuzzer_stats_path + '.nonexistent'
self.stats_getter = stats.StatsGetter(fuzzer_stats_path,
self.dict_path)
expected_stats = {
'actual_duration': 5,
'average_exec_per_sec': 0,
'bad_instrumentation': 0,
'corpus_crash_count': 0,
'corpus_size': 20,
'crash_count': 0,
'dict_used': 1,
'log_lines_unwanted': 0,
'manual_dict_size': 3,
'new_units_added': 1,
'new_units_generated': 2,
'stability': 0.0,
'startup_crash_count': 0,
'timeout_count': 0,
'timeout_limit': 0,
}
self.assertEqual(self._set_stats(), expected_stats)
def fuzz(self, target_path, options, reproducers_dir, max_time):
"""Run a fuzz session.
Args:
target_path: Path to the target.
options: The FuzzOptions object returned by prepare().
reproducers_dir: The directory to put reproducers in when crashes are
found.
max_time: Maximum allowed time for the fuzzing to run.
Returns:
A FuzzResult object.
"""
config = launcher.AflConfig.from_target_path(target_path)
config.additional_afl_arguments = options.arguments
testcase_file_path = os.path.join(reproducers_dir, 'crash')
runner = launcher.prepare_runner(target_path,
config,
testcase_file_path,
options.corpus_dir,
max_time,
strategy_dict=options.strategies)
fuzz_result = runner.fuzz()
command = fuzz_result.command
time_executed = fuzz_result.time_executed
fuzzing_logs = fuzz_result.output + runner.fuzzer_stderr
# Bail out if AFL returns a nonzero status code.
if fuzz_result.return_code:
target = engine_common.get_project_qualified_fuzzer_name(
target_path)
logs.log_error(
f'afl: engine encountered an error (target={target})',
engine_output=fuzz_result.output)
return engine.FuzzResult(fuzzing_logs, command, [], {},
time_executed)
stats_getter = stats.StatsGetter(runner.afl_output.stats_path,
config.dict_path)
new_units_generated, new_units_added, corpus_size = (
runner.libfuzzerize_corpus())
stats_getter.set_stats(fuzz_result.time_executed, new_units_generated,
new_units_added, corpus_size, runner.strategies,
runner.fuzzer_stderr, fuzz_result.output)
crashes = []
if os.path.exists(testcase_file_path):
crash = engine.Crash(testcase_file_path, runner.fuzzer_stderr, [],
fuzz_result.time_executed)
crashes.append(crash)
return engine.FuzzResult(fuzzing_logs, command, crashes,
stats_getter.stats, time_executed)
def setUp(self):
def get_data_path(filename, is_in_output=True):
"""Returns absolute path of data files used in unittests."""
input_or_output_dir = 'output' if is_in_output else 'input'
return os.path.join(self.data_dir, input_or_output_dir, filename)
self.data_dir = os.path.join(
os.path.abspath(os.path.dirname(__file__)), 'stats_data')
self.fuzzer_stats_path = get_data_path('fuzzer_stats')
self.fuzzer_stats_invalid_path = get_data_path('fuzzer_stats_invalid')
self.dict_path = get_data_path('sample.dict', False)
self.stats_getter = stats.StatsGetter(self.fuzzer_stats_path,
self.dict_path)
self.stats_getter.set_afl_stats()
dont_use_strategies(self)
self.strategies = launcher.FuzzingStrategies()
self.maxDiff = None # pylint: disable=invalid-name
