def test_test_for_reproducibility_greybox_succeed_after_multiple_tries(
self):
"""Test test_for_reproducibility with with failure on first run and then
succeed on remaining runs (greybox)."""
mock_engine = mock.Mock()
mock_engine.reproduce.side_effect = [
engine.ReproduceResult(['cmd'], 0, 0, 'output'),
engine.ReproduceResult(['cmd'], 1, 1, 'crash'),
engine.ReproduceResult(['cmd'], 1, 1, 'crash'),
]
self.mock.get.return_value = mock_engine
result = testcase_manager.test_for_reproducibility(
'engine',
'engine_target',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
self.assertEqual(3, mock_engine.reproduce.call_count)
self.mock.log.assert_has_calls([
mock.call('No crash occurred (round 1).',
output=self.GREYBOX_FUZZER_NO_CRASH),
mock.call('Crash occurred in 1 seconds (round 2). State:\nstate',
output=self.GREYBOX_FUZZER_CRASH),
mock.call('Crash occurred in 1 seconds (round 3). State:\nstate',
output=self.GREYBOX_FUZZER_CRASH),
mock.call('Crash is reproducible.'),
])
def test_test_for_reproducibility_blackbox_succeed_after_multiple_tries(
self):
"""Test test_for_reproducibility with failure on first run and then succeed
on remaining runs (blackbox)."""
self.mock.run_process.side_effect = [
(0, 0, 'output'),
(1, 1, 'crash'),
(1, 1, 'crash'),
]
result = testcase_manager.test_for_reproducibility(
'fuzzer',
'fuzzer',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
self.assertEqual(3, self.mock.run_process.call_count)
self.mock.log.assert_has_calls([
mock.call('No crash occurred (round 1).', output='output'),
mock.call('Crash occurred in 1 seconds (round 2). State:\nstate',
output='crash'),
mock.call('Crash occurred in 1 seconds (round 3). State:\nstate',
output='crash'),
mock.call('Crash is reproducible.'),
])
def test_test_for_reproducibility_greybox_succeed(self):
"""Test test_for_reproducibility with success on all runs (greybox)."""
mock_engine = mock.Mock()
mock_engine.reproduce.return_value = engine.ReproduceResult(['cmd'], 1,
1, 'crash')
self.mock.get.return_value = mock_engine
result = testcase_manager.test_for_reproducibility(
'engine',
'engine_target',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
# Only 2/3 runs needed to verify reproducibility.
self.assertEqual(2, mock_engine.reproduce.call_count)
self.mock.log.assert_has_calls([
mock.call('Crash occurred in 1 seconds (round 1). State:\nstate',
output=self.GREYBOX_FUZZER_CRASH),
mock.call('Crash occurred in 1 seconds (round 2). State:\nstate',
output=self.GREYBOX_FUZZER_CRASH),
mock.call('Crash is reproducible.'),
])
def test_test_for_reproducibility_blackbox_succeed(self):
"""Test test_for_reproducibility with success on all runs (blackbox)."""
self.mock.run_process.return_value = (1, 1, 'crash')
result = testcase_manager.test_for_reproducibility(
'fuzzer',
'fuzzer',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
# Only 2/3 runs needed to verify reproducibility.
self.assertEqual(2, self.mock.run_process.call_count)
self.mock.log.assert_has_calls([
mock.call(
'Crash occurred in 1 seconds (round 1). State:\nstate',
output='crash'),
mock.call(
'Crash occurred in 1 seconds (round 2). State:\nstate',
output='crash'),
mock.call('Crash is reproducible.'),
])
def test_test_for_reproducibility_blackbox(self):
"""Test test_for_reproducibility (blackbox)."""
self.mock.run_process.return_value = (1, 1, 'crash')
result = testcase_manager.test_for_reproducibility(
'fuzzer',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
# Only 2/3 runs needed to verify reproducibility.
self.assertEqual(2, self.mock.run_process.call_count)
def test_test_for_reproducibility_greybox(self):
"""Test test_for_reproducibility (greybox)."""
mock_engine = mock.Mock()
mock_engine.reproduce.return_value = engine.ReproduceResult(['cmd'], 1, 1,
'crash')
self.mock.get.return_value = mock_engine
result = testcase_manager.test_for_reproducibility(
'engine_target',
'/fuzz-testcase',
'state',
expected_security_flag=False,
test_timeout=10,
http_flag=False,
gestures=None)
self.assertTrue(result)
# Only 2/3 runs needed to verify reproducibility.
self.assertEqual(2, mock_engine.reproduce.call_count)
def execute_task(testcase_id, job_type):
"""Run a test case with a different job type to see if they reproduce."""
testcase = data_handler.get_testcase_by_id(testcase_id)
if not testcase:
return
if environment.is_engine_fuzzer_job(
testcase.job_type) != environment.is_engine_fuzzer_job(job_type):
# We should never reach here. But in case we do, we should bail out as
# otherwise we will run into exceptions.
return
# Use a cloned testcase entity with different fuzz target paramaters for
# a different fuzzing engine.
original_job_type = testcase.job_type
testcase = _get_variant_testcase_for_job(testcase, job_type)
# Setup testcase and its dependencies.
file_list, _, testcase_file_path = setup.setup_testcase(testcase, job_type)
if not file_list:
return
# Set up a custom or regular build. We explicitly omit the crash revision
# since we want to test against the latest build here.
build_manager.setup_build()
# Check if we have an application path. If not, our build failed to setup
# correctly.
if not build_manager.check_app_path():
testcase = data_handler.get_testcase_by_id(testcase_id)
data_handler.update_testcase_comment(
testcase,
data_types.TaskState.ERROR,
"Build setup failed with job: " + job_type,
)
return
# Disable gestures if we're running on a different platform from that of
# the original test case.
use_gestures = testcase.platform == environment.platform().lower()
# Reproduce the crash.
app_path = environment.get_value("APP_PATH")
command = testcase_manager.get_command_line_for_application(
testcase_file_path, app_path=app_path, needs_http=testcase.http_flag)
test_timeout = environment.get_value("TEST_TIMEOUT", 10)
revision = environment.get_value("APP_REVISION")
result = testcase_manager.test_for_crash_with_retries(
testcase,
testcase_file_path,
test_timeout,
http_flag=testcase.http_flag,
use_gestures=use_gestures,
compare_crash=False,
)
if result.is_crash() and not result.should_ignore():
crash_state = result.get_state()
crash_type = result.get_type()
security_flag = result.is_security_issue()
gestures = testcase.gestures if use_gestures else None
one_time_crasher_flag = not testcase_manager.test_for_reproducibility(
testcase.fuzzer_name,
testcase.actual_fuzzer_name(),
testcase_file_path,
crash_state,
security_flag,
test_timeout,
testcase.http_flag,
gestures,
)
if one_time_crasher_flag:
status = data_types.TestcaseVariantStatus.FLAKY
else:
status = data_types.TestcaseVariantStatus.REPRODUCIBLE
crash_comparer = CrashComparer(crash_state, testcase.crash_state)
is_similar = (crash_comparer.is_similar()
and security_flag == testcase.security_flag)
unsymbolized_crash_stacktrace = result.get_stacktrace(symbolized=False)
symbolized_crash_stacktrace = result.get_stacktrace(symbolized=True)
crash_stacktrace_output = utils.get_crash_stacktrace_output(
command, symbolized_crash_stacktrace,
unsymbolized_crash_stacktrace)
else:
status = data_types.TestcaseVariantStatus.UNREPRODUCIBLE
is_similar = False
crash_type = None
crash_state = None
security_flag = False
crash_stacktrace_output = "No crash occurred."
if original_job_type == job_type:
# This case happens when someone clicks 'Update last tested stacktrace using
# trunk build' button.
testcase = data_handler.get_testcase_by_id(testcase_id)
testcase.last_tested_crash_stacktrace = data_handler.filter_stacktrace(
crash_stacktrace_output)
testcase.set_metadata("last_tested_crash_revision",
revision,
update_testcase=True)
else:
# Regular case of variant analysis.
variant = data_handler.get_testcase_variant(testcase_id, job_type)
variant.status = status
variant.revision = revision
variant.crash_type = crash_type
variant.crash_state = crash_state
variant.security_flag = security_flag
variant.is_similar = is_similar
# Explicitly skipping crash stacktrace for now as it make entities larger
# and we plan to use only crash paramaters in UI.
variant.put()
def execute_task(testcase_id, job_type):
"""Run analyze task."""
# Reset redzones.
environment.reset_current_memory_tool_options(redzone_size=128)
# Unset window location size and position properties so as to use default.
environment.set_value('WINDOW_ARG', '')
# Locate the testcase associated with the id.
testcase = data_handler.get_testcase_by_id(testcase_id)
if not testcase:
return
data_handler.update_testcase_comment(testcase,
data_types.TaskState.STARTED)
metadata = data_types.TestcaseUploadMetadata.query(
data_types.TestcaseUploadMetadata.testcase_id == int(
testcase_id)).get()
if not metadata:
logs.log_error('Testcase %s has no associated upload metadata.' %
testcase_id)
testcase.key.delete()
return
is_lsan_enabled = environment.get_value('LSAN')
if is_lsan_enabled:
# Creates empty local blacklist so all leaks will be visible to uploader.
leak_blacklist.create_empty_local_blacklist()
# Store the bot name and timestamp in upload metadata.
bot_name = environment.get_value('BOT_NAME')
metadata.bot_name = bot_name
metadata.timestamp = datetime.datetime.utcnow()
metadata.put()
# Adjust the test timeout, if user has provided one.
if metadata.timeout:
environment.set_value('TEST_TIMEOUT', metadata.timeout)
# Adjust the number of retries, if user has provided one.
if metadata.retries is not None:
environment.set_value('CRASH_RETRIES', metadata.retries)
# Setup testcase and get absolute testcase path.
file_list, _, testcase_file_path = setup.setup_testcase(testcase, job_type)
if not file_list:
return
# Set up a custom or regular build based on revision.
build_manager.setup_build(testcase.crash_revision)
# Check if we have an application path. If not, our build failed
# to setup correctly.
if not build_manager.check_app_path():
data_handler.update_testcase_comment(testcase,
data_types.TaskState.ERROR,
'Build setup failed')
if data_handler.is_first_retry_for_task(testcase):
build_fail_wait = environment.get_value('FAIL_WAIT')
tasks.add_task('analyze',
testcase_id,
job_type,
wait_time=build_fail_wait)
else:
close_invalid_testcase_and_update_status(testcase, metadata,
'Build setup failed')
return
# Update initial testcase information.
testcase.absolute_path = testcase_file_path
testcase.job_type = job_type
testcase.binary_flag = utils.is_binary_file(testcase_file_path)
testcase.queue = tasks.default_queue()
testcase.crash_state = ''
# Set initial testcase metadata fields (e.g. build url, etc).
data_handler.set_initial_testcase_metadata(testcase)
# Update minimized arguments and use ones provided during user upload.
if not testcase.minimized_arguments:
minimized_arguments = environment.get_value('APP_ARGS') or ''
additional_command_line_flags = testcase.get_metadata(
'uploaded_additional_args')
if additional_command_line_flags:
minimized_arguments += ' %s' % additional_command_line_flags
environment.set_value('APP_ARGS', minimized_arguments)
testcase.minimized_arguments = minimized_arguments
# Update other fields not set at upload time.
testcase.crash_revision = environment.get_value('APP_REVISION')
data_handler.set_initial_testcase_metadata(testcase)
testcase.put()
# Initialize some variables.
gestures = testcase.gestures
http_flag = testcase.http_flag
test_timeout = environment.get_value('TEST_TIMEOUT')
# Get the crash output.
result = testcase_manager.test_for_crash_with_retries(testcase,
testcase_file_path,
test_timeout,
http_flag=http_flag,
compare_crash=False)
# If we don't get a crash, try enabling http to see if we can get a crash.
# Skip engine fuzzer jobs (e.g. libFuzzer, AFL) for which http testcase paths
# are not applicable.
if (not result.is_crash() and not http_flag
and not environment.is_engine_fuzzer_job()):
result_with_http = testcase_manager.test_for_crash_with_retries(
testcase,
testcase_file_path,
test_timeout,
http_flag=True,
compare_crash=False)
if result_with_http.is_crash():
logs.log('Testcase needs http flag for crash.')
http_flag = True
result = result_with_http
# Refresh our object.
testcase = data_handler.get_testcase_by_id(testcase_id)
if not testcase:
return
# Set application command line with the correct http flag.
application_command_line = (
testcase_manager.get_command_line_for_application(
testcase_file_path, needs_http=http_flag))
# Get the crash data.
crashed = result.is_crash()
crash_time = result.get_crash_time()
state = result.get_symbolized_data()
unsymbolized_crash_stacktrace = result.get_stacktrace(symbolized=False)
# Get crash info object with minidump info. Also, re-generate unsymbolized
# stacktrace if needed.
crash_info, _ = (crash_uploader.get_crash_info_and_stacktrace(
application_command_line, state.crash_stacktrace, gestures))
if crash_info:
testcase.minidump_keys = crash_info.store_minidump()
if not crashed:
# Could not reproduce the crash.
log_message = ('Testcase didn\'t crash in %d seconds (with retries)' %
test_timeout)
data_handler.update_testcase_comment(testcase,
data_types.TaskState.FINISHED,
log_message)
# In the general case, we will not attempt to symbolize if we do not detect
# a crash. For user uploads, we should symbolize anyway to provide more
# information about what might be happening.
crash_stacktrace_output = utils.get_crash_stacktrace_output(
application_command_line, state.crash_stacktrace,
unsymbolized_crash_stacktrace)
testcase.crash_stacktrace = data_handler.filter_stacktrace(
crash_stacktrace_output)
# For an unreproducible testcase, retry once on another bot to confirm
# our results and in case this bot is in a bad state which we didn't catch
# through our usual means.
if data_handler.is_first_retry_for_task(testcase):
testcase.status = 'Unreproducible, retrying'
testcase.put()
tasks.add_task('analyze', testcase_id, job_type)
return
close_invalid_testcase_and_update_status(testcase, metadata,
'Unreproducible')
# A non-reproducing testcase might still impact production branches.
# Add the impact task to get that information.
task_creation.create_impact_task_if_needed(testcase)
return
# Update http flag and re-run testcase to store dependencies (for bundled
# archives only).
testcase.http_flag = http_flag
if not store_testcase_dependencies_from_bundled_testcase_archive(
metadata, testcase, testcase_file_path):
return
# Update testcase crash parameters.
testcase.crash_type = state.crash_type
testcase.crash_address = state.crash_address
testcase.crash_state = state.crash_state
crash_stacktrace_output = utils.get_crash_stacktrace_output(
application_command_line, state.crash_stacktrace,
unsymbolized_crash_stacktrace)
testcase.crash_stacktrace = data_handler.filter_stacktrace(
crash_stacktrace_output)
# Try to guess if the bug is security or not.
security_flag = crash_analyzer.is_security_issue(state.crash_stacktrace,
state.crash_type,
state.crash_address)
testcase.security_flag = security_flag
# If it is, guess the severity.
if security_flag:
testcase.security_severity = severity_analyzer.get_security_severity(
state.crash_type, state.crash_stacktrace, job_type, bool(gestures))
log_message = ('Testcase crashed in %d seconds (r%d)' %
(crash_time, testcase.crash_revision))
data_handler.update_testcase_comment(testcase,
data_types.TaskState.FINISHED,
log_message)
# See if we have to ignore this crash.
if crash_analyzer.ignore_stacktrace(state.crash_stacktrace):
close_invalid_testcase_and_update_status(testcase, metadata,
'Irrelavant')
return
# Test for reproducibility.
one_time_crasher_flag = not testcase_manager.test_for_reproducibility(
testcase.fuzzer_name, testcase.actual_fuzzer_name(),
testcase_file_path, state.crash_state, security_flag, test_timeout,
http_flag, gestures)
testcase.one_time_crasher_flag = one_time_crasher_flag
# Check to see if this is a duplicate.
project_name = data_handler.get_project_name(job_type)
existing_testcase = data_handler.find_testcase(project_name,
state.crash_type,
state.crash_state,
security_flag)
if existing_testcase:
# If the existing test case is unreproducible and we are, replace the
# existing test case with this one.
if existing_testcase.one_time_crasher_flag and not one_time_crasher_flag:
duplicate_testcase = existing_testcase
original_testcase = testcase
else:
duplicate_testcase = testcase
original_testcase = existing_testcase
metadata.status = 'Duplicate'
metadata.duplicate_of = existing_testcase.key.id()
duplicate_testcase.status = 'Duplicate'
duplicate_testcase.duplicate_of = original_testcase.key.id()
duplicate_testcase.put()
# Set testcase and metadata status if not set already.
if testcase.status != 'Duplicate':
testcase.status = 'Processed'
metadata.status = 'Confirmed'
# Add new leaks to global blacklist to avoid detecting duplicates.
# Only add if testcase has a direct leak crash and if it's reproducible.
if is_lsan_enabled:
leak_blacklist.add_crash_to_global_blacklist_if_needed(testcase)
# Update the testcase values.
testcase.put()
# Update the upload metadata.
metadata.security_flag = security_flag
metadata.put()
# Create tasks to
# 1. Minimize testcase (minimize).
# 2. Find regression range (regression).
# 3. Find testcase impact on production branches (impact).
# 4. Check whether testcase is fixed (progression).
# 5. Get second stacktrace from another job in case of
# one-time crashers (stack).
task_creation.create_tasks(testcase)
