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[3.12] gh-104690: thread_run() checks for tstate dangling pointer (#109056) (#109133)

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gh-104690: thread_run() checks for tstate dangling pointer (#109056)

thread_run() of _threadmodule.c now calls
_PyThreadState_CheckConsistency() to check if tstate is a dangling
pointer when Python is built in debug mode.

Rename ceval_gil.c is_tstate_valid() to
_PyThreadState_CheckConsistency() to reuse it in _threadmodule.c.

(cherry picked from commit f63d37877a)
This commit is contained in:
Victor Stinner 2023-10-02 16:55:06 +02:00 • committed by GitHub
parent 9207c870be
commit 30748d36b3
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4 changed files with 35 additions and 20 deletions
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7
Modules/_threadmodule.c
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@ -1072,9 +1072,12 @@ static void
thread_run(void *boot_raw)
{
struct bootstate *boot = (struct bootstate *) boot_raw;
PyThreadState *tstate;
PyThreadState *tstate = boot->tstate;
// gh-104690: If Python is being finalized and PyInterpreterState_Delete()
// was called, tstate becomes a dangling pointer.
assert(_PyThreadState_CheckConsistency(tstate));
tstate = boot->tstate;
_PyThreadState_Bind(tstate);
PyEval_AcquireThread(tstate);
tstate->interp->threads.count++;