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[3.12] gh-104341: Call _PyEval_ReleaseLock() with NULL When Finalizing the Current Thread (gh-105109) (gh-105209)

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This avoids the problematic race in drop_gil() by skipping the FORCE_SWITCHING code there for finalizing threads.

(The idea for this approach came out of discussions with @markshannon.)
(cherry picked from commit 3698fda)

Co-authored-by: Eric Snow ericsnowcurrently@gmail.com
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Miss Islington (bot) 2023-06-01 15:50:28 -07:00 • committed by GitHub
parent c38ceb032d
commit d2be5c73ed
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4 changed files with 46 additions and 9 deletions
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Python/pylifecycle.c
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@ -2035,7 +2035,7 @@ new_interpreter(PyThreadState **tstate_p, const PyInterpreterConfig *config)
const PyConfig *src_config;
if (save_tstate != NULL) {
// XXX Might new_interpreter() have been called without the GIL held?
_PyEval_ReleaseLock(save_tstate);
_PyEval_ReleaseLock(save_tstate->interp, save_tstate);
src_config = _PyInterpreterState_GetConfig(save_tstate->interp);
}
else