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# Copyright 2014 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.
import fnmatch
import logging
import posixpath
import signal
try:
import _thread as thread
except ImportError:
import thread
import threading
from devil import base_error
from devil.android import crash_handler
from devil.android import device_errors
from devil.android.sdk import version_codes
from devil.android.tools import device_recovery
from devil.utils import signal_handler
from pylib import valgrind_tools
from pylib.base import base_test_result
from pylib.base import test_run
from pylib.base import test_collection
from pylib.local.device import local_device_environment
_SIGTERM_TEST_LOG = (
' Suite execution terminated, probably due to swarming timeout.\n'
' Your test may not have run.')
def SubstituteDeviceRoot(device_path, device_root):
if not device_path:
return device_root
elif isinstance(device_path, list):
return posixpath.join(*(p if p else device_root for p in device_path))
else:
return device_path
class TestsTerminated(Exception):
pass
class InvalidShardingSettings(Exception):
def __init__(self, shard_index, total_shards):
super(InvalidShardingSettings, self).__init__(
'Invalid sharding settings. shard_index: %d total_shards: %d'
% (shard_index, total_shards))
class LocalDeviceTestRun(test_run.TestRun):
def __init__(self, env, test_instance):
super(LocalDeviceTestRun, self).__init__(env, test_instance)
self._tools = {}
# This is intended to be filled by a child class.
self._installed_packages = []
env.SetPreferredAbis(test_instance.GetPreferredAbis())
#override
def RunTests(self, results):
tests = self._GetTests()
exit_now = threading.Event()
@local_device_environment.handle_shard_failures
def run_tests_on_device(dev, tests, results):
# This is performed here instead of during setup because restarting the
# device clears app compatibility flags, which will happen if a device
# needs to be recovered.
SetAppCompatibilityFlagsIfNecessary(self._installed_packages, dev)
consecutive_device_errors = 0
for test in tests:
if not test:
logging.warning('No tests in shared. Continuing.')
tests.test_completed()
continue
if exit_now.isSet():
thread.exit()
result = None
rerun = None
try:
result, rerun = crash_handler.RetryOnSystemCrash(
lambda d, t=test: self._RunTest(d, t),
device=dev)
consecutive_device_errors = 0
if isinstance(result, base_test_result.BaseTestResult):
results.AddResult(result)
elif isinstance(result, list):
results.AddResults(result)
else:
raise Exception(
'Unexpected result type: %s' % type(result).__name__)
except device_errors.CommandTimeoutError:
# Test timeouts don't count as device errors for the purpose
# of bad device detection.
consecutive_device_errors = 0
if isinstance(test, list):
results.AddResults(
base_test_result.BaseTestResult(
self._GetUniqueTestName(t),
base_test_result.ResultType.TIMEOUT) for t in test)
else:
results.AddResult(
base_test_result.BaseTestResult(
self._GetUniqueTestName(test),
base_test_result.ResultType.TIMEOUT))
except Exception as e: # pylint: disable=broad-except
if isinstance(tests, test_collection.TestCollection):
rerun = test
if (isinstance(e, device_errors.DeviceUnreachableError)
or not isinstance(e, base_error.BaseError)):
# If we get a device error but believe the device is still
# reachable, attempt to continue using it. Otherwise, raise
# the exception and terminate this run_tests_on_device call.
raise
consecutive_device_errors += 1
if consecutive_device_errors >= 3:
# We believe the device is still reachable and may still be usable,
# but if it fails repeatedly, we shouldn't attempt to keep using
# it.
logging.error('Repeated failures on device %s. Abandoning.',
str(dev))
raise
logging.exception(
'Attempting to continue using device %s despite failure (%d/3).',
str(dev), consecutive_device_errors)
finally:
if isinstance(tests, test_collection.TestCollection):
if rerun:
tests.add(rerun)
tests.test_completed()
logging.info('Finished running tests on this device.')
def stop_tests(_signum, _frame):
logging.critical('Received SIGTERM. Stopping test execution.')
exit_now.set()
raise TestsTerminated()
try:
with signal_handler.AddSignalHandler(signal.SIGTERM, stop_tests):
self._env.ResetCurrentTry()
while self._env.current_try < self._env.max_tries and tests:
tries = self._env.current_try
grouped_tests = self._GroupTests(tests)
logging.info('STARTING TRY #%d/%d', tries + 1, self._env.max_tries)
if tries > 0 and self._env.recover_devices:
if any(d.build_version_sdk == version_codes.LOLLIPOP_MR1
for d in self._env.devices):
logging.info(
'Attempting to recover devices due to known issue on L MR1. '
'See crbug.com/787056 for details.')
self._env.parallel_devices.pMap(
device_recovery.RecoverDevice, None)
elif tries + 1 == self._env.max_tries:
logging.info(
'Attempting to recover devices prior to last test attempt.')
self._env.parallel_devices.pMap(
device_recovery.RecoverDevice, None)
logging.info('Will run %d tests on %d devices: %s',
len(tests), len(self._env.devices),
', '.join(str(d) for d in self._env.devices))
for t in tests:
logging.debug(' %s', t)
try_results = base_test_result.TestRunResults()
test_names = (self._GetUniqueTestName(t) for t in tests)
try_results.AddResults(
base_test_result.BaseTestResult(
t, base_test_result.ResultType.NOTRUN)
for t in test_names if not t.endswith('*'))
# As soon as we know the names of the tests, we populate |results|.
# The tests in try_results will have their results updated by
# try_results.AddResult() as they are run.
results.append(try_results)
try:
if self._ShouldShard():
tc = test_collection.TestCollection(
self._CreateShards(grouped_tests))
self._env.parallel_devices.pMap(
run_tests_on_device, tc, try_results).pGet(None)
else:
self._env.parallel_devices.pMap(run_tests_on_device,
grouped_tests,
try_results).pGet(None)
except TestsTerminated:
for unknown_result in try_results.GetUnknown():
try_results.AddResult(
base_test_result.BaseTestResult(
unknown_result.GetName(),
base_test_result.ResultType.TIMEOUT,
log=_SIGTERM_TEST_LOG))
raise
self._env.IncrementCurrentTry()
tests = self._GetTestsToRetry(tests, try_results)
logging.info('FINISHED TRY #%d/%d', tries + 1, self._env.max_tries)
if tests:
logging.info('%d failed tests remain.', len(tests))
else:
logging.info('All tests completed.')
except TestsTerminated:
pass
def _GetTestsToRetry(self, tests, try_results):
def is_failure_result(test_result):
if isinstance(test_result, list):
return any(is_failure_result(r) for r in test_result)
return (
test_result is None
or test_result.GetType() not in (
base_test_result.ResultType.PASS,
base_test_result.ResultType.SKIP))
all_test_results = {r.GetName(): r for r in try_results.GetAll()}
tests_and_names = ((t, self._GetUniqueTestName(t)) for t in tests)
tests_and_results = {}
for test, name in tests_and_names:
if name.endswith('*'):
tests_and_results[name] = (test, [
r for n, r in all_test_results.items() if fnmatch.fnmatch(n, name)
])
else:
tests_and_results[name] = (test, all_test_results.get(name))
failed_tests_and_results = ((test, result)
for test, result in tests_and_results.values()
if is_failure_result(result))
return [t for t, r in failed_tests_and_results if self._ShouldRetry(t, r)]
def _ApplyExternalSharding(self, tests, shard_index, total_shards):
logging.info('Using external sharding settings. This is shard %d/%d',
shard_index, total_shards)
if total_shards < 0 or shard_index < 0 or total_shards <= shard_index:
raise InvalidShardingSettings(shard_index, total_shards)
sharded_tests = []
# Group tests by tests that should run in the same test invocation - either
# unit tests or batched tests.
grouped_tests = self._GroupTests(tests)
# Partition grouped tests approximately evenly across shards.
partitioned_tests = self._PartitionTests(grouped_tests, total_shards,
float('inf'))
if len(partitioned_tests) <= shard_index:
return []
for t in partitioned_tests[shard_index]:
if isinstance(t, list):
sharded_tests.extend(t)
else:
sharded_tests.append(t)
return sharded_tests
# Partition tests evenly into |num_desired_partitions| partitions where
# possible. However, many constraints make partitioning perfectly impossible.
# If the max_partition_size isn't large enough, extra partitions may be
# created (infinite max size should always return precisely the desired
# number of partitions). Even if the |max_partition_size| is technically large
# enough to hold all of the tests in |num_desired_partitions|, we attempt to
# keep test order relatively stable to minimize flakes, so when tests are
# grouped (eg. batched tests), we cannot perfectly fill all paritions as that
# would require breaking up groups.
def _PartitionTests(self, tests, num_desired_partitions, max_partition_size):
# pylint: disable=no-self-use
partitions = []
# Sort by hash so we don't put all tests in a slow suite in the same
# partition.
tests = sorted(
tests,
key=lambda t: hash(
self._GetUniqueTestName(t[0] if isinstance(t, list) else t)))
def CountTestsIndividually(test):
if not isinstance(test, list):
return False
annotations = test[0]['annotations']
# UnitTests tests are really fast, so to balance shards better, count
# UnitTests Batches as single tests.
return ('Batch' not in annotations
or annotations['Batch']['value'] != 'UnitTests')
num_not_yet_allocated = sum(
[len(test) - 1 for test in tests if CountTestsIndividually(test)])
num_not_yet_allocated += len(tests)
# Fast linear partition approximation capped by max_partition_size. We
# cannot round-robin or otherwise re-order tests dynamically because we want
# test order to remain stable.
partition_size = min(num_not_yet_allocated // num_desired_partitions,
max_partition_size)
partitions.append([])
last_partition_size = 0
for test in tests:
test_count = len(test) if CountTestsIndividually(test) else 1
# Make a new shard whenever we would overfill the previous one. However,
# if the size of the test group is larger than the max partition size on
# its own, just put the group in its own shard instead of splitting up the
# group.
if (last_partition_size + test_count > partition_size
and last_partition_size > 0):
num_desired_partitions -= 1
if num_desired_partitions <= 0:
# Too many tests for number of partitions, just fill all partitions
# beyond num_desired_partitions.
partition_size = max_partition_size
else:
# Re-balance remaining partitions.
partition_size = min(num_not_yet_allocated // num_desired_partitions,
max_partition_size)
partitions.append([])
partitions[-1].append(test)
last_partition_size = test_count
else:
partitions[-1].append(test)
last_partition_size += test_count
num_not_yet_allocated -= test_count
if not partitions[-1]:
partitions.pop()
return partitions
def GetTool(self, device):
if str(device) not in self._tools:
self._tools[str(device)] = valgrind_tools.CreateTool(
self._env.tool, device)
return self._tools[str(device)]
def _CreateShards(self, tests):
raise NotImplementedError
def _GetUniqueTestName(self, test):
# pylint: disable=no-self-use
return test
def _ShouldRetry(self, test, result):
# pylint: disable=no-self-use,unused-argument
return True
def _GetTests(self):
raise NotImplementedError
def _GroupTests(self, tests):
# pylint: disable=no-self-use
return tests
def _RunTest(self, device, test):
raise NotImplementedError
def _ShouldShard(self):
raise NotImplementedError
def SetAppCompatibilityFlagsIfNecessary(packages, device):
"""Sets app compatibility flags on the given packages and device.
Args:
packages: A list of strings containing package names to apply flags to.
device: A DeviceUtils instance to apply the flags on.
"""
def set_flag_for_packages(flag, enable):
enable_str = 'enable' if enable else 'disable'
for p in packages:
cmd = ['am', 'compat', enable_str, flag, p]
device.RunShellCommand(cmd)
sdk_version = device.build_version_sdk
if sdk_version >= version_codes.R:
# These flags are necessary to use the legacy storage permissions on R+.
# See crbug.com/1173699 for more information.
set_flag_for_packages('DEFAULT_SCOPED_STORAGE', False)
set_flag_for_packages('FORCE_ENABLE_SCOPED_STORAGE', False)
class NoTestsError(Exception):
"""Error for when no tests are found."""