bpo-46417: Finalize structseq types at exit (GH-30645)

Add _PyStructSequence_FiniType() and _PyStaticType_Dealloc()
functions to finalize a structseq static type in Py_Finalize().
Currrently, these functions do nothing if Python is built in release
mode.

Clear static types:

* AsyncGenHooksType: sys.set_asyncgen_hooks()
* FlagsType: sys.flags
* FloatInfoType: sys.float_info
* Hash_InfoType: sys.hash_info
* Int_InfoType: sys.int_info
* ThreadInfoType: sys.thread_info
* UnraisableHookArgsType: sys.unraisablehook
* VersionInfoType: sys.version
* WindowsVersionType: sys.getwindowsversion()

6 files changed, 10 insertions, 0 deletions

diff --git a/Include/internal/pycore_floatobject.h b/Include/internal/pycore_floatobject.h
index be6045587d..891e422f59 100644
--- a/Include/internal/pycore_floatobject.h
+++ b/Include/internal/pycore_floatobject.h
@@ -14,6 +14,7 @@ extern "C" {
 extern void _PyFloat_InitState(PyInterpreterState *);
 extern PyStatus _PyFloat_InitTypes(PyInterpreterState *);
 extern void _PyFloat_Fini(PyInterpreterState *);
+extern void _PyFloat_FiniType(PyInterpreterState *);
 
 
 /* other API */
diff --git a/Include/internal/pycore_long.h b/Include/internal/pycore_long.h
index 4d1a0d0424..436bf08468 100644
--- a/Include/internal/pycore_long.h
+++ b/Include/internal/pycore_long.h
@@ -15,6 +15,7 @@ extern "C" {
 /* runtime lifecycle */
 
 extern PyStatus _PyLong_InitTypes(PyInterpreterState *);
+extern void _PyLong_FiniTypes(PyInterpreterState *interp);
 
 
 /* other API */
diff --git a/Include/internal/pycore_pyerrors.h b/Include/internal/pycore_pyerrors.h
index f375337a40..e3c445ba5d 100644
--- a/Include/internal/pycore_pyerrors.h
+++ b/Include/internal/pycore_pyerrors.h
@@ -12,6 +12,7 @@ extern "C" {
 /* runtime lifecycle */
 
 extern PyStatus _PyErr_InitTypes(PyInterpreterState *);
+extern void _PyErr_FiniTypes(PyInterpreterState *);
 
 
 /* other API */
diff --git a/Include/internal/pycore_pylifecycle.h b/Include/internal/pycore_pylifecycle.h
index 766e889f23..dfa8fd6bd0 100644
--- a/Include/internal/pycore_pylifecycle.h
+++ b/Include/internal/pycore_pylifecycle.h
@@ -58,6 +58,7 @@ extern PyStatus _PySys_Create(
 extern PyStatus _PySys_ReadPreinitWarnOptions(PyWideStringList *options);
 extern PyStatus _PySys_ReadPreinitXOptions(PyConfig *config);
 extern int _PySys_UpdateConfig(PyThreadState *tstate);
+extern void _PySys_Fini(PyInterpreterState *interp);
 extern PyStatus _PyBuiltins_AddExceptions(PyObject * bltinmod);
 extern PyStatus _Py_HashRandomization_Init(const PyConfig *);
 
@@ -81,6 +82,7 @@ extern void _PyTraceMalloc_Fini(void);
 extern void _PyWarnings_Fini(PyInterpreterState *interp);
 extern void _PyAST_Fini(PyInterpreterState *interp);
 extern void _PyAtExit_Fini(PyInterpreterState *interp);
+extern void _PyThread_FiniType(PyInterpreterState *interp);
 
 extern PyStatus _PyGILState_Init(_PyRuntimeState *runtime);
 extern PyStatus _PyGILState_SetTstate(PyThreadState *tstate);
diff --git a/Include/internal/pycore_typeobject.h b/Include/internal/pycore_typeobject.h
index 7fd8a1f350..ba95bbc1c4 100644
--- a/Include/internal/pycore_typeobject.h
+++ b/Include/internal/pycore_typeobject.h
@@ -40,6 +40,8 @@ struct type_cache {
 
 extern PyStatus _PyTypes_InitSlotDefs(void);
 
+extern void _PyStaticType_Dealloc(PyTypeObject *type);
+
 
 #ifdef __cplusplus
 }
diff --git a/Include/structseq.h b/Include/structseq.h
index e89265a67c..8abd244346 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -27,6 +27,9 @@ PyAPI_FUNC(void) PyStructSequence_InitType(PyTypeObject *type,
 PyAPI_FUNC(int) PyStructSequence_InitType2(PyTypeObject *type,
                                            PyStructSequence_Desc *desc);
 #endif
+#ifdef Py_BUILD_CORE
+PyAPI_FUNC(void) _PyStructSequence_FiniType(PyTypeObject *type);
+#endif
 PyAPI_FUNC(PyTypeObject*) PyStructSequence_NewType(PyStructSequence_Desc *desc);
 
 PyAPI_FUNC(PyObject *) PyStructSequence_New(PyTypeObject* type);