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Issue #25122: try to debug test_eintr hang on FreeBSD

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* Add verbose mode to test_eintr
* Always enable verbose mode in test_eintr
* Use faulthandler.dump_traceback_later() with a timeout of 15 minutes in
  eintr_tester.py
This commit is contained in:
Victor Stinner 2015-09-15 12:15:59 +02:00
parent 024364a89a
commit f11d0d2c0d
2 changed files with 19 additions and 1 deletions
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8
Lib/test/eintrdata/eintr_tester.py
View file

@ -8,6 +8,7 @@ Signals are generated in-process using setitimer(ITIMER_REAL), which allows
sub-second periodicity (contrarily to signal()). sub-second periodicity (contrarily to signal()).
""" """
import faulthandler
import io import io
import os import os
import select import select
@ -36,12 +37,19 @@ class EINTRBaseTest(unittest.TestCase):
@classmethod @classmethod
def setUpClass(cls): def setUpClass(cls):
cls.orig_handler = signal.signal(signal.SIGALRM, lambda *args: None) cls.orig_handler = signal.signal(signal.SIGALRM, lambda *args: None)
if hasattr(faulthandler, 'dump_traceback_later'):
# Most tests take less than 30 seconds, so 15 minutes should be
# enough. dump_traceback_later() is implemented with a thread, but
# pthread_sigmask() is used to mask all signaled on this thread.
faulthandler.dump_traceback_later(5 * 60, exit=True)
signal.setitimer(signal.ITIMER_REAL, cls.signal_delay, signal.setitimer(signal.ITIMER_REAL, cls.signal_delay,
cls.signal_period) cls.signal_period)
@classmethod @classmethod
def stop_alarm(cls): def stop_alarm(cls):
signal.setitimer(signal.ITIMER_REAL, 0, 0) signal.setitimer(signal.ITIMER_REAL, 0, 0)
if hasattr(faulthandler, 'cancel_dump_traceback_later'):
faulthandler.cancel_dump_traceback_later()
@classmethod @classmethod
def tearDownClass(cls): def tearDownClass(cls):

12
Lib/test/test_eintr.py
View file

@ -1,5 +1,7 @@
import os import os
import signal import signal
import subprocess
import sys
import unittest import unittest
from test import support from test import support
@ -14,7 +16,15 @@ class EINTRTests(unittest.TestCase):
# Run the tester in a sub-process, to make sure there is only one # Run the tester in a sub-process, to make sure there is only one
# thread (for reliable signal delivery). # thread (for reliable signal delivery).
tester = support.findfile("eintr_tester.py", subdir="eintrdata") tester = support.findfile("eintr_tester.py", subdir="eintrdata")
script_helper.assert_python_ok(tester)
# FIXME: Issue #25122, always run in verbose mode to debug hang on FreeBSD
if True: #support.verbose:
args = [sys.executable, tester]
with subprocess.Popen(args, stdout=sys.stderr) as proc:
exitcode = proc.wait()
self.assertEqual(exitcode, 0)
else:
script_helper.assert_python_ok(tester)
if __name__ == "__main__": if __name__ == "__main__":