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Merge pull request #7836 from bonzini/mtest-asyncio

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[RFC] mtest: use asyncio instead of concurrency.futures
pull/8005/head
Jussi Pakkanen 4 years ago committed by GitHub
parent 188695f202 a2c134c30b
commit ef6f85f8ba
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1 changed files with 212 additions and 137 deletions
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  1. 343
      mesonbuild/mtest.py

343
mesonbuild/mtest.py
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@ -15,10 +15,10 @@
# A tool to run tests in many different ways.
from ._pathlib import Path
from collections import namedtuple
from collections import deque, namedtuple
from copy import deepcopy
import argparse
import concurrent.futures as conc
import asyncio
import datetime
import enum
import io
@ -167,6 +167,7 @@ class TestResult(enum.Enum):
OK = 'OK'
TIMEOUT = 'TIMEOUT'
INTERRUPT = 'INTERRUPT'
SKIP = 'SKIP'
FAIL = 'FAIL'
EXPECTEDFAIL = 'EXPECTEDFAIL'
@ -326,7 +327,6 @@ class TAPParser:
yield self.Error('Too many tests run (expected {}, got {})'.format(plan.count, num_tests))
class JunitBuilder:
"""Builder for Junit test results.
@ -376,7 +376,8 @@ class JunitBuilder:
'testsuite',
name=suitename,
tests=str(len(test.results)),
errors=str(sum(1 for r in test.results if r is TestResult.ERROR)),
errors=str(sum(1 for r in test.results if r in
{TestResult.INTERRUPT, TestResult.ERROR})),
failures=str(sum(1 for r in test.results if r in
{TestResult.FAIL, TestResult.UNEXPECTEDPASS, TestResult.TIMEOUT})),
skipped=str(sum(1 for r in test.results if r is TestResult.SKIP)),
@ -395,6 +396,9 @@ class JunitBuilder:
elif result is TestResult.UNEXPECTEDPASS:
fail = et.SubElement(testcase, 'failure')
fail.text = 'Test unexpected passed.'
elif result is TestResult.INTERRUPT:
fail = et.SubElement(testcase, 'failure')
fail.text = 'Test was interrupted by user.'
elif result is TestResult.TIMEOUT:
fail = et.SubElement(testcase, 'failure')
fail.text = 'Test did not finish before configured timeout.'
@ -606,6 +610,31 @@ def load_tests(build_dir: str) -> T.List[TestSerialisation]:
objs = check_testdata(pickle.load(f))
return objs
# Custom waiting primitives for asyncio
async def try_wait_one(*awaitables: T.Any, timeout: T.Optional[T.Union[int, float]]) -> None:
try:
await asyncio.wait(awaitables,
timeout=timeout, return_when=asyncio.FIRST_COMPLETED)
except asyncio.TimeoutError:
pass
async def complete(future: asyncio.Future) -> None:
"""Wait for completion of the given future, ignoring cancellation."""
try:
await future
except asyncio.CancelledError:
pass
async def complete_all(futures: T.Iterable[asyncio.Future]) -> None:
"""Wait for completion of all the given futures, ignoring cancellation."""
while futures:
done, futures = await asyncio.wait(futures, return_when=asyncio.FIRST_EXCEPTION)
# Raise exceptions if needed for all the "done" futures
for f in done:
if not f.cancelled():
f.result()
class SingleTestRunner:
@ -636,7 +665,7 @@ class SingleTestRunner:
return self.test.exe_runner.get_command() + self.test.fname
return self.test.fname
def run(self) -> TestRun:
async def run(self) -> TestRun:
cmd = self._get_cmd()
if cmd is None:
skip_stdout = 'Not run because can not execute cross compiled binaries.'
@ -645,9 +674,94 @@ class SingleTestRunner:
wrap = TestHarness.get_wrapper(self.options)
if self.options.gdb:
self.test.timeout = None
return self._run_cmd(wrap + cmd + self.test.cmd_args + self.options.test_args)
return await self._run_cmd(wrap + cmd + self.test.cmd_args + self.options.test_args)
async def _run_subprocess(self, args: T.List[str], *, timeout: T.Optional[int],
stdout: T.IO, stderr: T.IO,
env: T.Dict[str, str], cwd: T.Optional[str]) -> T.Tuple[int, TestResult, T.Optional[str]]:
async def kill_process(p: asyncio.subprocess.Process) -> T.Optional[str]:
# Python does not provide multiplatform support for
# killing a process and all its children so we need
# to roll our own.
try:
if is_windows():
subprocess.run(['taskkill', '/F', '/T', '/PID', str(p.pid)])
else:
# Send a termination signal to the process group that setsid()
# created - giving it a chance to perform any cleanup.
os.killpg(p.pid, signal.SIGTERM)
# Make sure the termination signal actually kills the process
# group, otherwise retry with a SIGKILL.
await try_wait_one(p.wait(), timeout=0.5)
if p.returncode is not None:
return None
os.killpg(p.pid, signal.SIGKILL)
await try_wait_one(p.wait(), timeout=1)
if p.returncode is not None:
return None
# An earlier kill attempt has not worked for whatever reason.
# Try to kill it one last time with a direct call.
# If the process has spawned children, they will remain around.
p.kill()
await try_wait_one(p.wait(), timeout=1)
if p.returncode is not None:
return None
return 'Test process could not be killed.'
except ProcessLookupError:
# Sometimes (e.g. with Wine) this happens. There's nothing
# we can do, probably the process already died so just wait
# for the event loop to pick that up.
await p.wait()
return None
# Let gdb handle ^C instead of us
if self.options.gdb:
previous_sigint_handler = signal.getsignal(signal.SIGINT)
# Make the meson executable ignore SIGINT while gdb is running.
signal.signal(signal.SIGINT, signal.SIG_IGN)
def _run_cmd(self, cmd: T.List[str]) -> TestRun:
def preexec_fn() -> None:
if self.options.gdb:
# Restore the SIGINT handler for the child process to
# ensure it can handle it.
signal.signal(signal.SIGINT, signal.SIG_DFL)
else:
# We don't want setsid() in gdb because gdb needs the
# terminal in order to handle ^C and not show tcsetpgrp()
# errors avoid not being able to use the terminal.
os.setsid()
p = await asyncio.create_subprocess_exec(*args,
stdout=stdout,
stderr=stderr,
env=env,
cwd=cwd,
preexec_fn=preexec_fn if not is_windows() else None)
result = None
additional_error = None
try:
await try_wait_one(p.wait(), timeout=timeout)
if p.returncode is None:
if self.options.verbose:
print('{} time out (After {} seconds)'.format(self.test.name, timeout))
additional_error = await kill_process(p)
result = TestResult.TIMEOUT
except asyncio.CancelledError:
# The main loop must have seen Ctrl-C.
additional_error = await kill_process(p)
result = TestResult.INTERRUPT
finally:
if self.options.gdb:
# Let us accept ^C again
signal.signal(signal.SIGINT, previous_sigint_handler)
return p.returncode or 0, result, additional_error
async def _run_cmd(self, cmd: T.List[str]) -> TestRun:
starttime = time.time()
if self.test.extra_paths:
@ -678,23 +792,6 @@ class SingleTestRunner:
if self.test.protocol is TestProtocol.TAP and stderr is stdout:
stdout = tempfile.TemporaryFile("wb+")
# Let gdb handle ^C instead of us
if self.options.gdb:
previous_sigint_handler = signal.getsignal(signal.SIGINT)
# Make the meson executable ignore SIGINT while gdb is running.
signal.signal(signal.SIGINT, signal.SIG_IGN)
def preexec_fn() -> None:
if self.options.gdb:
# Restore the SIGINT handler for the child process to
# ensure it can handle it.
signal.signal(signal.SIGINT, signal.SIG_DFL)
else:
# We don't want setsid() in gdb because gdb needs the
# terminal in order to handle ^C and not show tcsetpgrp()
# errors avoid not being able to use the terminal.
os.setsid()
extra_cmd = [] # type: T.List[str]
if self.test.protocol is TestProtocol.GTEST:
gtestname = self.test.name
@ -702,77 +799,19 @@ class SingleTestRunner:
gtestname = os.path.join(self.test.workdir, self.test.name)
extra_cmd.append('--gtest_output=xml:{}.xml'.format(gtestname))
p = subprocess.Popen(cmd + extra_cmd,
stdout=stdout,
stderr=stderr,
env=self.env,
cwd=self.test.workdir,
preexec_fn=preexec_fn if not is_windows() else None)
timed_out = False
kill_test = False
if self.test.timeout is None:
timeout = None
elif self.options.timeout_multiplier is not None:
timeout = self.test.timeout * self.options.timeout_multiplier
else:
timeout = self.test.timeout
try:
p.communicate(timeout=timeout)
except subprocess.TimeoutExpired:
if self.options.verbose:
print('{} time out (After {} seconds)'.format(self.test.name, timeout))
timed_out = True
except KeyboardInterrupt:
mlog.warning('CTRL-C detected while running {}'.format(self.test.name))
kill_test = True
finally:
if self.options.gdb:
# Let us accept ^C again
signal.signal(signal.SIGINT, previous_sigint_handler)
additional_error = None
if kill_test or timed_out:
# Python does not provide multiplatform support for
# killing a process and all its children so we need
# to roll our own.
if is_windows():
subprocess.run(['taskkill', '/F', '/T', '/PID', str(p.pid)])
else:
def _send_signal_to_process_group(pgid : int, signum : int) -> None:
""" sends a signal to a process group """
try:
os.killpg(pgid, signum)
except ProcessLookupError:
# Sometimes (e.g. with Wine) this happens.
# There's nothing we can do (maybe the process
# already died) so carry on.
pass
# Send a termination signal to the process group that setsid()
# created - giving it a chance to perform any cleanup.
_send_signal_to_process_group(p.pid, signal.SIGTERM)
# Make sure the termination signal actually kills the process
# group, otherwise retry with a SIGKILL.
try:
p.communicate(timeout=0.5)
except subprocess.TimeoutExpired:
_send_signal_to_process_group(p.pid, signal.SIGKILL)
try:
p.communicate(timeout=1)
except subprocess.TimeoutExpired:
# An earlier kill attempt has not worked for whatever reason.
# Try to kill it one last time with a direct call.
# If the process has spawned children, they will remain around.
p.kill()
try:
p.communicate(timeout=1)
except subprocess.TimeoutExpired:
additional_error = 'Test process could not be killed.'
except ValueError:
additional_error = 'Could not read output. Maybe the process has redirected its stdout/stderr?'
returncode, result, additional_error = await self._run_subprocess(cmd + extra_cmd,
timeout=timeout,
stdout=stdout,
stderr=stderr,
env=self.env,
cwd=self.test.workdir)
endtime = time.time()
duration = endtime - starttime
if additional_error is None:
@ -789,17 +828,17 @@ class SingleTestRunner:
else:
stdo = ""
stde = additional_error
if timed_out:
return TestRun(self.test, self.test_env, TestResult.TIMEOUT, [], p.returncode, starttime, duration, stdo, stde, cmd)
if result:
return TestRun(self.test, self.test_env, result, [], returncode, starttime, duration, stdo, stde, cmd)
else:
if self.test.protocol is TestProtocol.EXITCODE:
return TestRun.make_exitcode(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)
return TestRun.make_exitcode(self.test, self.test_env, returncode, starttime, duration, stdo, stde, cmd)
elif self.test.protocol is TestProtocol.GTEST:
return TestRun.make_gtest(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)
return TestRun.make_gtest(self.test, self.test_env, returncode, starttime, duration, stdo, stde, cmd)
else:
if self.options.verbose:
print(stdo, end='')
return TestRun.make_tap(self.test, self.test_env, p.returncode, starttime, duration, stdo, stde, cmd)
return TestRun.make_tap(self.test, self.test_env, returncode, starttime, duration, stdo, stde, cmd)
class TestHarness:
@ -892,7 +931,7 @@ class TestHarness:
self.skip_count += 1
elif result.res is TestResult.OK:
self.success_count += 1
elif result.res is TestResult.FAIL or result.res is TestResult.ERROR:
elif result.res in {TestResult.FAIL, TestResult.ERROR, TestResult.INTERRUPT}:
self.fail_count += 1
elif result.res is TestResult.EXPECTEDFAIL:
self.expectedfail_count += 1
@ -905,7 +944,7 @@ class TestHarness:
tests: T.List[TestSerialisation],
name: str, result: TestRun, i: int) -> None:
ok_statuses = (TestResult.OK, TestResult.EXPECTEDFAIL)
bad_statuses = (TestResult.FAIL, TestResult.TIMEOUT,
bad_statuses = (TestResult.FAIL, TestResult.TIMEOUT, TestResult.INTERRUPT,
TestResult.UNEXPECTEDPASS, TestResult.ERROR)
result_str = '{num:{numlen}}/{testcount} {name:{name_max_len}} {res:{reslen}} {dur:.2f}s'.format(
numlen=len(str(test_count)),
@ -1131,8 +1170,14 @@ class TestHarness:
return test.name
def run_tests(self, tests: T.List[TestSerialisation]) -> None:
executor = None
futures = [] # type: T.List[T.Tuple[conc.Future[TestRun], int, int, T.List[TestSerialisation], str, int]]
# Replace with asyncio.run once we can require Python 3.7
loop = asyncio.get_event_loop()
loop.run_until_complete(self._run_tests(tests))
async def _run_tests(self, tests: T.List[TestSerialisation]) -> None:
semaphore = asyncio.Semaphore(self.options.num_processes)
futures = deque() # type: T.Deque[asyncio.Future]
running_tests = dict() # type: T.Dict[asyncio.Future, str]
test_count = len(tests)
name_max_len = max([len(self.get_pretty_suite(test)) for test in tests])
self.open_log_files()
@ -1140,59 +1185,87 @@ class TestHarness:
if self.options.wd:
os.chdir(self.options.wd)
self.build_data = build.load(os.getcwd())
interrupted = False
async def run_test(test: SingleTestRunner,
name: str, index: int) -> None:
async with semaphore:
if interrupted or (self.options.repeat > 1 and self.fail_count):
return
res = await test.run()
self.process_test_result(res)
self.print_stats(test_count, name_max_len, tests, name, res, index)
def test_done(f: asyncio.Future) -> None:
if not f.cancelled():
f.result()
futures.remove(f)
try:
del running_tests[f]
except KeyError:
pass
def cancel_one_test(warn: bool) -> None:
future = futures.popleft()
futures.append(future)
if warn:
mlog.warning('CTRL-C detected, interrupting {}'.format(running_tests[future]))
del running_tests[future]
future.cancel()
def sigterm_handler() -> None:
nonlocal interrupted
if interrupted:
return
interrupted = True
mlog.warning('Received SIGTERM, exiting')
while running_tests:
cancel_one_test(False)
def sigint_handler() -> None:
# We always pick the longest-running future that has not been cancelled
# If all the tests have been CTRL-C'ed, just stop
nonlocal interrupted
if interrupted:
return
if running_tests:
cancel_one_test(True)
else:
mlog.warning('CTRL-C detected, exiting')
interrupted = True
if sys.platform != 'win32':
asyncio.get_event_loop().add_signal_handler(signal.SIGINT, sigint_handler)
asyncio.get_event_loop().add_signal_handler(signal.SIGTERM, sigterm_handler)
try:
for _ in range(self.options.repeat):
for i, test in enumerate(tests, 1):
visible_name = self.get_pretty_suite(test)
single_test = self.get_test_runner(test)
if not test.is_parallel or self.options.num_processes == 1 or single_test.options.gdb:
self.drain_futures(futures)
futures = []
res = single_test.run()
self.process_test_result(res)
self.print_stats(test_count, name_max_len, tests, visible_name, res, i)
else:
if not executor:
executor = conc.ThreadPoolExecutor(max_workers=self.options.num_processes)
f = executor.submit(single_test.run)
futures.append((f, test_count, name_max_len, tests, visible_name, i))
if self.options.repeat > 1 and self.fail_count:
break
if not test.is_parallel or single_test.options.gdb:
await complete_all(futures)
future = asyncio.ensure_future(run_test(single_test, visible_name, i))
futures.append(future)
running_tests[future] = visible_name
future.add_done_callback(test_done)
if not test.is_parallel or single_test.options.gdb:
await complete(future)
if self.options.repeat > 1 and self.fail_count:
break
self.drain_futures(futures)
await complete_all(futures)
self.print_collected_logs()
self.print_summary()
if self.logfilename:
print('Full log written to {}'.format(self.logfilename))
finally:
if sys.platform != 'win32':
asyncio.get_event_loop().remove_signal_handler(signal.SIGINT)
asyncio.get_event_loop().remove_signal_handler(signal.SIGTERM)
os.chdir(startdir)
def drain_futures(self, futures: T.List[T.Tuple['conc.Future[TestRun]', int, int, T.List[TestSerialisation], str, int]]) -> None:
for x in futures:
(result, test_count, name_max_len, tests, name, i) = x
if self.options.repeat > 1 and self.fail_count:
result.cancel()
if self.options.verbose:
result.result()
self.process_test_result(result.result())
self.print_stats(test_count, name_max_len, tests, name, result.result(), i)
def run_special(self) -> int:
'''Tests run by the user, usually something like "under gdb 1000 times".'''
if self.is_run:
raise RuntimeError('Can not use run_special after a full run.')
tests = self.get_tests()
if not tests:
return 0
self.run_tests(tests)
return self.total_failure_count()
def list_tests(th: TestHarness) -> bool:
tests = th.get_tests()
for t in tests:
@ -1235,6 +1308,10 @@ def run(options: argparse.Namespace) -> int:
if options.wrapper:
check_bin = options.wrapper[0]
if sys.platform == 'win32':
loop = asyncio.ProactorEventLoop()
asyncio.set_event_loop(loop)
if check_bin is not None:
exe = ExternalProgram(check_bin, silent=True)
if not exe.found():
@ -1252,9 +1329,7 @@ def run(options: argparse.Namespace) -> int:
try:
if options.list:
return list_tests(th)
if not options.args:
return th.doit()
return th.run_special()
except TestException as e:
print('Meson test encountered an error:\n')
if os.environ.get('MESON_FORCE_BACKTRACE'):

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