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).

3 files changed, 5 insertions, 6 deletions

diff --git a/Include/internal/pycore_object.h b/Include/internal/pycore_object.h
index 46555218bc..ba6636d7f8 100644
--- a/Include/internal/pycore_object.h
+++ b/Include/internal/pycore_object.h
@@ -38,7 +38,7 @@ static inline void _PyObject_GC_TRACK_impl(const char *filename, int lineno,
                           filename, lineno, "_PyObject_GC_TRACK");
 
     PyThreadState *tstate = _PyThreadState_GET();
-    PyGC_Head *generation0 = tstate->interp->runtime->gc.generation0;
+    PyGC_Head *generation0 = tstate->interp->gc.generation0;
     PyGC_Head *last = (PyGC_Head*)(generation0->_gc_prev);
     _PyGCHead_SET_NEXT(last, gc);
     _PyGCHead_SET_PREV(gc, last);
diff --git a/Include/internal/pycore_pymem.h b/Include/internal/pycore_pymem.h
index 97d8fd9990..a4e9720683 100644
--- a/Include/internal/pycore_pymem.h
+++ b/Include/internal/pycore_pymem.h
@@ -144,7 +144,7 @@ struct _gc_runtime_state {
     Py_ssize_t long_lived_pending;
 };
 
-PyAPI_FUNC(void) _PyGC_InitializeRuntime(struct _gc_runtime_state *);
+PyAPI_FUNC(void) _PyGC_InitState(struct _gc_runtime_state *);
 
 
 /* Set the memory allocator of the specified domain to the default.
diff --git a/Include/internal/pycore_pystate.h b/Include/internal/pycore_pystate.h
index fec64a7bad..0c3c1e3df3 100644
--- a/Include/internal/pycore_pystate.h
+++ b/Include/internal/pycore_pystate.h
@@ -74,6 +74,8 @@ struct _is {
 
     int finalizing;
 
+    struct _gc_runtime_state gc;
+
     PyObject *modules;
     PyObject *modules_by_index;
     PyObject *sysdict;
@@ -130,9 +132,7 @@ struct _is {
     struct _warnings_runtime_state warnings;
 
     PyObject *audit_hooks;
-/*
- * See bpo-36876: miscellaneous ad hoc statics have been moved here.
- */
+
     struct {
         struct {
             int level;
@@ -239,7 +239,6 @@ typedef struct pyruntimestate {
     void (*exitfuncs[NEXITFUNCS])(void);
     int nexitfuncs;
 
-    struct _gc_runtime_state gc;
     struct _ceval_runtime_state ceval;
     struct _gilstate_runtime_state gilstate;