gh-81057: Move Global Variables Holding Objects to _PyRuntimeState. (gh-99487)

This moves nearly all remaining object-holding globals in core code (other than static types).

https://github.com/python/cpython/issues/81057

Include/internal/pycore_global_objects.h

@@ -10,6 +10,7 @@ extern "C" {
 
 #include "pycore_gc.h"              // PyGC_Head
 #include "pycore_global_strings.h"  // struct _Py_global_strings
+#include "pycore_typeobject.h"      // pytype_slotdef
 
 
 // These would be in pycore_long.h if it weren't for an include cycle.
@@ -20,6 +21,13 @@ extern "C" {
 // Only immutable objects should be considered runtime-global.
 // All others must be per-interpreter.
 
+#define _Py_CACHED_OBJECT(NAME) \
+    _PyRuntime.cached_objects.NAME
+
+struct _Py_cached_objects {
+    PyObject *str_replace_inf;
+};
+
 #define _Py_GLOBAL_OBJECT(NAME) \
     _PyRuntime.global_objects.NAME
 #define _Py_SINGLETON(NAME) \
@@ -54,6 +62,10 @@ struct _Py_global_objects {
 
 struct _Py_interp_cached_objects {
     int _not_set;
+    /* object.__reduce__ */
+    PyObject *objreduce;
+    PyObject *type_slots_pname;
+    pytype_slotdef *type_slots_ptrs[MAX_EQUIV];
 };
 
 #define _Py_INTERP_STATIC_OBJECT(interp, NAME) \

Include/internal/pycore_runtime.h

@@ -136,7 +136,15 @@ typedef struct pyruntimestate {
 
     struct _Py_unicode_runtime_ids unicode_ids;
 
+    struct {
+        /* Used to set PyTypeObject.tp_version_tag */
+        // bpo-42745: next_version_tag remains shared by all interpreters
+        // because of static types.
+        unsigned int next_version_tag;
+    } types;
+
     /* All the objects that are shared by the runtime's interpreters. */
+    struct _Py_cached_objects cached_objects;
     struct _Py_global_objects global_objects;
 
     /* The following fields are here to avoid allocation during init.

Include/internal/pycore_runtime_init.h

@@ -36,6 +36,9 @@ extern "C" {
               until _PyInterpreterState_Enable() is called. */ \
             .next_id = -1, \
         }, \
+        .types = { \
+            .next_version_tag = 1, \
+        }, \
         .global_objects = { \
             .singletons = { \
                 .small_ints = _Py_small_ints_INIT, \

Include/internal/pycore_typeobject.h

@@ -18,6 +18,15 @@ extern void _PyTypes_Fini(PyInterpreterState *);
 
 /* other API */
 
+/* Length of array of slotdef pointers used to store slots with the
+   same __name__.  There should be at most MAX_EQUIV-1 slotdef entries with
+   the same __name__, for any __name__. Since that's a static property, it is
+   appropriate to declare fixed-size arrays for this. */
+#define MAX_EQUIV 10
+
+typedef struct wrapperbase pytype_slotdef;
+
+
 // Type attribute lookup cache: speed up attribute and method lookups,
 // see _PyType_Lookup().
 struct type_cache_entry {