Issue #8407: Fix pthread_sigmask() tests on Mac OS X
Disable faulthandler timeout thread on Mac OS X: it interacts with pthread_sigmask() tests.
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@ -504,6 +504,21 @@ class PthreadSigmaskTests(unittest.TestCase):
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def read_sigmask():
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return signal.pthread_sigmask(signal.SIG_BLOCK, [])
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if sys.platform == "darwin":
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import faulthandler
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# The fault handler timeout thread masks all signals. If the main
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# thread masks also SIGUSR1, all threads mask this signal. In this
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# case, on Mac OS X, if we send SIGUSR1 to the process, the signal
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# is pending in the main or the faulthandler timeout thread.
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# Unblock SIGUSR1 in the main thread calls the signal handler only
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# if the signal is pending for the main thread.
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#
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# Stop the faulthandler timeout thread to workaround this problem.
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# Another solution would be to send the signal directly to the main
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# thread using pthread_kill(), but Python doesn't expose this
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# function.
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faulthandler.cancel_dump_tracebacks_later()
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old_handler = signal.signal(signum, handler)
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self.addCleanup(signal.signal, signum, old_handler)
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