[3.8] bpo-43406: Fix possible race condition where PyErr_CheckSignals tries to execute a non-Python signal handler (GH-24756)
#24762
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…ls`` tries to execute a non-Python signal handler (pythonGH-24756) We can receive signals (at the C level, in `trip_signal()` in signalmodule.c) while `signal.signal` is being called to modify the corresponding handler. Later when `PyErr_CheckSignals()` is called to handle the given signal, the handler may be a non-callable object and would raise a cryptic asynchronous exception.. (cherry picked from commit 68245b7) Co-authored-by: Antoine Pitrou <antoine@python.org>
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We can receive signals (at the C level, in
trip_signal()in signalmodule.c) whilesignal.signalis being called to modify the corresponding handler. Later whenPyErr_CheckSignals()is called to handle the given signal, the handler may be a non-callable object and would raise a cryptic asynchronous exception..(cherry picked from commit 68245b7)
Co-authored-by: Antoine Pitrou antoine@python.org
https://bugs.python.org/issue43406
Automerge-Triggered-By: GH:pitrou