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Code Issues Projects Releases Packages Wiki Activity Actions 13

GH-118074: Executors in the COLD_EXITS array are not GC'able (#118117)

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Guido van Rossum 2024-04-22 16:20:39 -07:00 • committed by GitHub
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Misc/NEWS.d/next/Core and Builtins/2024-04-22-08-34-28.gh-issue-118074.5_JnIa.rst Normal file
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@ -0,0 +1,2 @@
Make sure that the Executor objects in the COLD_EXITS array aren't assumed
to be GC-able (which would access bytes outside the object).

10
Python/optimizer.c
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@ -394,6 +394,15 @@ executor_traverse(PyObject *o, visitproc visit, void *arg)
return 0;
}
static int
executor_is_gc(PyObject *o)
{
if ((PyObject *)&COLD_EXITS[0] <= o && o < (PyObject *)&COLD_EXITS[COLD_EXIT_COUNT]) {
return 0;
}
return 1;
}
PyTypeObject _PyUOpExecutor_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
.tp_name = "uop_executor",
@ -405,6 +414,7 @@ PyTypeObject _PyUOpExecutor_Type = {
.tp_methods = executor_methods,
.tp_traverse = executor_traverse,
.tp_clear = executor_clear,
.tp_is_gc = executor_is_gc,
};
/* TO DO -- Generate these tables */