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bpo-33613, test_semaphore_tracker_sigint: fix race condition #7850

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Merged
pitrou merged 21 commits into from
Sep 4, 2018
Merged

bpo-33613, test_semaphore_tracker_sigint: fix race condition #7850

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5f1df08
bpo-33613, test_semaphore_tracker_sigint: fix race condition
pablogsal Jun 20, 2018
4f9babb
Implement PONG command in the semaphore tracker
pablogsal Jun 24, 2018
26d81a3
Ensure the tracker is killed to allow multiple testing runs in the sa…
pablogsal Jun 24, 2018
a7d5c59
fixup! Ensure the tracker is killed to allow multiple testing runs in…
pablogsal Jul 1, 2018
a735d49
fixup! fixup! Ensure the tracker is killed to allow multiple testing …
pablogsal Jul 7, 2018
9460da4
fixup! fixup! fixup! Ensure the tracker is killed to allow multiple t…
pablogsal Jul 24, 2018
fb136d0
Use a buffered writer to answer to the PING command
pablogsal Jul 24, 2018
f3d0f0b
Use the tracker own stderr for answering the PING command
pablogsal Jul 24, 2018
f5e5cf9
Use pthread_sigmask to avoid the race condition
pablogsal Jul 27, 2018
4393021
Add comment explaining the race condition
pablogsal Jul 27, 2018
d501f2f
Restore timeout and use os.waitpid
pablogsal Jul 31, 2018
9e0243e
fixup! Restore timeout and use os.waitpid
pablogsal Jul 31, 2018
26e077b
Add News entry
pablogsal Jul 31, 2018
a50912b
fixup! fixup! Restore timeout and use os.waitpid
pablogsal Jul 31, 2018
bcbb942
fixup! Add News entry
pablogsal Jul 31, 2018
0b46f07
fixup! fixup! fixup! Restore timeout and use os.waitpid
pablogsal Aug 1, 2018
66ef7dc
Unregister sigmask if process fails to start
pablogsal Aug 3, 2018
f7d2d4d
Include the signal registering in the try block
pablogsal Sep 3, 2018
4a09fde
Simplify comment when handling ChildProcessError
pablogsal Sep 3, 2018
c9f96c1
Eliminate hardcoded reference to the bug tracker url
pablogsal Sep 3, 2018
c0a088c
Remove extraneous NEWS file
pitrou Sep 4, 2018
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Eliminate hardcoded reference to the bug tracker url
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@pablogsal
pablogsal committed Sep 3, 2018
commit c9f96c1edcaadafd5a2039c876a05b4ec0bbbcda
12 changes: 6 additions & 6 deletions Lib/multiprocessing/semaphore_tracker.py
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Expand Up @@ -77,12 +77,12 @@ def ensure_running(self):
exe = spawn.get_executable()
args = [exe] + util._args_from_interpreter_flags()
args += ['-c', cmd % r]
# Register a signal mask that will block the signals. This signal
# mask will be inherited by the child that is going to be spawned
# and will protect the child from a race condition that can make
# the child die before it registers signal handlers for SIGINT and
# SIGTERM. The mask is unregistered after spawning the child.
# For more info, see: https://bugs.python.org/issue33613
# bpo-33613: Register a signal mask that will block the signals.
# This signal mask will be inherited by the child that is going
# to be spawned and will protect the child from a race condition
# that can make the child die before it registers signal handlers
# for SIGINT and SIGTERM. The mask is unregistered after spawning
# the child.
try:
if _HAVE_SIGMASK:
signal.pthread_sigmask(signal.SIG_BLOCK, _IGNORED_SIGNALS)
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