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Issue #23680: Reduce risk of race condition in check_interrupted_write() of

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test_io. Allocate the large data before scheduling an alarm in 1 second.

On very slow computer, the alarm rings sometimes during the memory allocation.
This commit is contained in:
Victor Stinner 2015-03-16 18:03:06 +01:00
parent 6d3c09f284
commit 9c182a1e25
1 changed files with 2 additions and 2 deletions
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4
Lib/test/test_io.py
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@ -3431,6 +3431,7 @@ class SignalsTest(unittest.TestCase):
t.daemon = True
r, w = os.pipe()
fdopen_kwargs["closefd"] = False
large_data = item * (support.PIPE_MAX_SIZE // len(item) + 1)
try:
wio = self.io.open(w, **fdopen_kwargs)
t.start()
@ -3442,8 +3443,7 @@ class SignalsTest(unittest.TestCase):
# handlers, which in this case will invoke alarm_interrupt().
signal.alarm(1)
try:
self.assertRaises(ZeroDivisionError,
wio.write, item * (support.PIPE_MAX_SIZE // len(item) + 1))
self.assertRaises(ZeroDivisionError, wio.write, large_data)
finally:
signal.alarm(0)
t.join()