bpo-36854: Move _PyRuntimeState.gc to PyInterpreterState (GH-17287)

* Rename _PyGC_InitializeRuntime() to _PyGC_InitState()
* finalize_interp_clear() now also calls _PyGC_Fini() in
  subinterpreters (clear the GC state).

1 files changed, 13 insertions, 7 deletions

diff --git a/Objects/object.c b/Objects/object.c
index 3e61282..6fc1146 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -2131,11 +2131,14 @@ finally:
 void
 _PyTrash_deposit_object(PyObject *op)
 {
+    PyThreadState *tstate = _PyThreadState_GET();
+    struct _gc_runtime_state *gcstate = &tstate->interp->gc;
+
     _PyObject_ASSERT(op, PyObject_IS_GC(op));
     _PyObject_ASSERT(op, !_PyObject_GC_IS_TRACKED(op));
     _PyObject_ASSERT(op, op->ob_refcnt == 0);
-    _PyGCHead_SET_PREV(_Py_AS_GC(op), _PyRuntime.gc.trash_delete_later);
-    _PyRuntime.gc.trash_delete_later = op;
+    _PyGCHead_SET_PREV(_Py_AS_GC(op), gcstate->trash_delete_later);
+    gcstate->trash_delete_later = op;
 }
 
 /* The equivalent API, using per-thread state recursion info */
@@ -2156,11 +2159,14 @@ _PyTrash_thread_deposit_object(PyObject *op)
 void
 _PyTrash_destroy_chain(void)
 {
-    while (_PyRuntime.gc.trash_delete_later) {
-        PyObject *op = _PyRuntime.gc.trash_delete_later;
+    PyThreadState *tstate = _PyThreadState_GET();
+    struct _gc_runtime_state *gcstate = &tstate->interp->gc;
+
+    while (gcstate->trash_delete_later) {
+        PyObject *op = gcstate->trash_delete_later;
         destructor dealloc = Py_TYPE(op)->tp_dealloc;
 
-        _PyRuntime.gc.trash_delete_later =
+        gcstate->trash_delete_later =
             (PyObject*) _PyGCHead_PREV(_Py_AS_GC(op));
 
         /* Call the deallocator directly.  This used to try to
@@ -2170,9 +2176,9 @@ _PyTrash_destroy_chain(void)
          * up distorting allocation statistics.
          */
         _PyObject_ASSERT(op, op->ob_refcnt == 0);
-        ++_PyRuntime.gc.trash_delete_nesting;
+        ++gcstate->trash_delete_nesting;
         (*dealloc)(op);
-        --_PyRuntime.gc.trash_delete_nesting;
+        --gcstate->trash_delete_nesting;
     }
 }