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[3.13] gh-128717: Stop-the-world when setting the recursion limit (GH-128741) (#128757)

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[3.13] gh-128717: Stop-the-world when setting the recursion limit (GH-128741)
(cherry picked from commit f6c61bf2d7)

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
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Peter Bierma 2025-01-14 03:03:52 -05:00 • committed by GitHub
parent f2a2809683
commit 1ec36a62eb
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3 changed files with 36 additions and 0 deletions
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Python/ceval.c
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@ -265,12 +265,16 @@ void
Py_SetRecursionLimit(int new_limit)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
_PyEval_StopTheWorld(interp);
HEAD_LOCK(interp->runtime);
interp->ceval.recursion_limit = new_limit;
for (PyThreadState *p = interp->threads.head; p != NULL; p = p->next) {
int depth = p->py_recursion_limit - p->py_recursion_remaining;
p->py_recursion_limit = new_limit;
p->py_recursion_remaining = new_limit - depth;
}
HEAD_UNLOCK(interp->runtime);
_PyEval_StartTheWorld(interp);
}
/* The function _Py_EnterRecursiveCallTstate() only calls _Py_CheckRecursiveCall()