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[3.13] gh-133744: Fix multiprocessing interrupt test: add an event (#133746) (#133917)

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gh-133744: Fix multiprocessing interrupt test: add an event (#133746)

Add an event to synchronize the parent process with the child
process: wait until the child process starts sleeping.

(cherry picked from commit c2989b7070)
This commit is contained in:
Victor Stinner 2025-05-12 16:16:52 +02:00 • committed by GitHub
parent 532acbd0fa
commit 5ce47b96b0
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2 changed files with 15 additions and 3 deletions
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15
Lib/test/_test_multiprocessing.py
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@ -511,6 +511,11 @@ class _TestProcess(BaseTestCase):
def _sleep_some(cls):
time.sleep(100)
@classmethod
def _sleep_some_event(cls, event):
event.set()
time.sleep(100)
@classmethod
def _test_sleep(cls, delay):
time.sleep(delay)
@ -519,7 +524,8 @@ class _TestProcess(BaseTestCase):
if self.TYPE == 'threads':
self.skipTest('test not appropriate for {}'.format(self.TYPE))
p = self.Process(target=self._sleep_some)
event = self.Event()
p = self.Process(target=self._sleep_some_event, args=(event,))
p.daemon = True
p.start()
@ -537,8 +543,11 @@ class _TestProcess(BaseTestCase):
self.assertTimingAlmostEqual(join.elapsed, 0.0)
self.assertEqual(p.is_alive(), True)
# XXX maybe terminating too soon causes the problems on Gentoo...
time.sleep(1)
timeout = support.SHORT_TIMEOUT
if not event.wait(timeout):
p.terminate()
p.join()
self.fail(f"event not signaled in {timeout} seconds")
meth(p)