[3.7] bpo-33613, test_semaphore_tracker_sigint: fix race condition (GH-7850) #9055
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…H-7850) Fail `test_semaphore_tracker_sigint` if no warnings are expected and one is received. Fix race condition when the child receives SIGINT before it can register signal handlers for it. The race condition occurs when the parent calls `_semaphore_tracker.ensure_running()` (which in turn spawns the semaphore_tracker using `_posixsubprocess.fork_exec`), the child registers the signal handlers and the parent tries to kill the child. What seem to happen is that in some slow systems, the parent sends the signal to kill the child before the child protects against the signal. (cherry picked from commit ec74d18) Co-authored-by: Pablo Galindo <[email protected]>
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Rejected. This isn't fixing a user-visible bug. |
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@pablogsal and @pitrou: Backport status check is done, and it's a failure ❌ . |
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@pablogsal and @pitrou: Backport status check is done, and it's a failure ❌ . |
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Fail
test_semaphore_tracker_sigintif no warnings are expected and one is received.Fix race condition when the child receives SIGINT before it can register signal handlers for it.
The race condition occurs when the parent calls
_semaphore_tracker.ensure_running()(which in turn spawns thesemaphore_tracker using
_posixsubprocess.fork_exec), the childregisters the signal handlers and the parent tries to kill the child.
What seem to happen is that in some slow systems, the parent sends the
signal to kill the child before the child protects against the signal.
(cherry picked from commit ec74d18)
Co-authored-by: Pablo Galindo [email protected]
https://bugs.python.org/issue33613