gh-115103: Update refleak checker to trigger _PyMem_ProcessDelayed

Author: corona10

Include/internal/pycore_gc.h

@@ -288,6 +288,9 @@ extern PyObject *_PyGC_GetReferrers(PyInterpreterState *interp, PyObject *objs);
 extern void _PyGC_ClearAllFreeLists(PyInterpreterState *interp);
 extern void _Py_ScheduleGC(PyThreadState *tstate);
 extern void _Py_RunGC(PyThreadState *tstate);
+#ifdef Py_GIL_DISABLED
+extern void _PyGC_Clear_DelayedObjects(PyInterpreterState *interp);
+#endif
 
 #ifdef __cplusplus
 }

Lib/test/support/__init__.py

@@ -785,6 +785,7 @@ def gc_collect():
     gc.collect()
     gc.collect()
     gc.collect()
+    gc._collect_delayed_objects()
 
 @contextlib.contextmanager
 def disable_gc():

Modules/clinic/gcmodule.c.h

@@ -93,6 +93,24 @@ gc_collect_impl(PyObject *module, int generation)
     return _PyGC_Collect(tstate, generation, _Py_GC_REASON_MANUAL);
 }
 
+/*[clinic input]
+gc._collect_delayed_objects
+
+Process delayed free requests by force
+
+[clinic start generated code]*/
+
+static PyObject *
+gc__collect_delayed_objects_impl(PyObject *module)
+/*[clinic end generated code: output=a016a10f967d4229 input=1064c31903cd9fac]*/
+{
+#ifdef Py_GIL_DISABLED
+    PyInterpreterState *interp = _PyInterpreterState_GET();
+    _PyGC_Clear_DelayedObjects(interp);
+#endif
+    Py_RETURN_NONE;
+}
+
 /*[clinic input]
 gc.set_debug
 
@@ -508,6 +526,7 @@ static PyMethodDef GcMethods[] = {
     GC_FREEZE_METHODDEF
     GC_UNFREEZE_METHODDEF
     GC_GET_FREEZE_COUNT_METHODDEF
+    GC__COLLECT_DELAYED_OBJECTS_METHODDEF
     {NULL,      NULL}           /* Sentinel */
 };
 

Modules/gcmodule.c

@@ -1758,4 +1758,16 @@ _PyGC_ClearAllFreeLists(PyInterpreterState *interp)
     HEAD_UNLOCK(&_PyRuntime);
 }
 
+void
+_PyGC_Clear_DelayedObjects(PyInterpreterState *interp)
+{
+    HEAD_LOCK(&_PyRuntime);
+    PyThreadState *tstate = interp->threads.head;
+    while (tstate != NULL) {
+        _PyMem_ProcessDelayed(tstate);
+        tstate = (PyThreadState *)tstate->next;
+    }
+    HEAD_UNLOCK(&_PyRuntime);
+}
+
 #endif  // Py_GIL_DISABLED