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

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Merged
merged 1 commit into from
May 12, 2025
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[3.13] gh-133744: Fix multiprocessing interrupt test: add an event (#133746) #133917

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15 changes: 12 additions & 3 deletions Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -511,6 +511,11 @@ def _test_process_mainthread_native_id(cls, q):
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)
Expand All @@ -519,7 +524,8 @@ def _kill_process(self, meth):
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()

Expand All @@ -537,8 +543,11 @@ def _kill_process(self, meth):
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)

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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Tests/2025-05-09-14-54-48.gh-issue-133744.LCquu0.rst
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@@ -0,0 +1,3 @@
Fix multiprocessing interrupt test. Add an event to synchronize the parent
process with the child process: wait until the child process starts
sleeping. Patch by Victor Stinner.
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