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bpo-36867: Avoid weak syncronization primitive in resource_tracker tests #13292

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Merged
merged 1 commit into from
May 17, 2019
Merged

bpo-36867: Avoid weak syncronization primitive in resource_tracker tests #13292

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16 changes: 12 additions & 4 deletions Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3945,11 +3945,19 @@ def test_shared_memory_cleaned_after_process_termination(self):
# segment should not leak the given memory segment.
p.terminate()
p.wait()
time.sleep(1.0) # wait for the OS to collect the segment

# The shared memory file was deleted.
with self.assertRaises(FileNotFoundError):
smm = shared_memory.SharedMemory(name, create=False)
deadline = time.monotonic() + 60
t = 0.1
while time.monotonic() < deadline:
time.sleep(t)
t = min(t*2, 5)
try:
smm = shared_memory.SharedMemory(name, create=False)
except FileNotFoundError:
break
else:
raise AssertionError("A SharedMemory segment was leaked after"
" a process was abruptly terminated.")

if os.name == 'posix':
# A warning was emitted by the subprocess' own
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