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[3.12] gh-131740: Update PyUnstable_GC_VisitObjects to traverse perm gen (#131828)

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Donghee Na 2025-03-28 22:55:58 +09:00 • committed by GitHub
parent 4f7b66ab82
commit 940c937c13
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2 changed files with 21 additions and 10 deletions
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1
Misc/NEWS.d/next/C API/2025-03-26-06-56-40.gh-issue-131740.9PdxxQ.rst Normal file
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@ -0,0 +1 @@
Update PyUnstable_GC_VisitObjects to traverse perm gen.

30
Modules/gcmodule.c
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@ -2443,6 +2443,23 @@ PyObject_GC_IsFinalized(PyObject *obj)
return 0;
}
static int
visit_generation(gcvisitobjects_t callback, void *arg, struct gc_generation *gen)
{
PyGC_Head *gc_list, *gc;
gc_list = &gen->head;
for (gc = GC_NEXT(gc_list); gc != gc_list; gc = GC_NEXT(gc)) {
PyObject *op = FROM_GC(gc);
Py_INCREF(op);
int res = callback(op, arg);
Py_DECREF(op);
if (!res) {
return -1;
}
}
return 0;
}
void
PyUnstable_GC_VisitObjects(gcvisitobjects_t callback, void *arg)
{
@ -2451,18 +2468,11 @@ PyUnstable_GC_VisitObjects(gcvisitobjects_t callback, void *arg)
int origenstate = gcstate->enabled;
gcstate->enabled = 0;
for (i = 0; i < NUM_GENERATIONS; i++) {
PyGC_Head *gc_list, *gc;
gc_list = GEN_HEAD(gcstate, i);
for (gc = GC_NEXT(gc_list); gc != gc_list; gc = GC_NEXT(gc)) {
PyObject *op = FROM_GC(gc);
Py_INCREF(op);
int res = callback(op, arg);
Py_DECREF(op);
if (!res) {
goto done;
}
if (visit_generation(callback, arg, &gcstate->generations[i])) {
goto done;
}
}
visit_generation(callback, arg, &gcstate->permanent_generation);
done:
gcstate->enabled = origenstate;
}