gh-131776: Expose functions called from the interpreter loop via PyAPI_FUNC (#134242)

Include/internal/pycore_call.h

@@ -186,7 +186,7 @@ _PyObject_CallNoArgs(PyObject *func) {
 }
 
 
-extern PyObject *const *
+PyAPI_FUNC(PyObject *const *)
 _PyStack_UnpackDict(PyThreadState *tstate,
     PyObject *const *args, Py_ssize_t nargs,
     PyObject *kwargs, PyObject **p_kwnames);
@@ -196,7 +196,7 @@ extern void _PyStack_UnpackDict_Free(
     Py_ssize_t nargs,
     PyObject *kwnames);
 
-extern void _PyStack_UnpackDict_FreeNoDecRef(
+PyAPI_FUNC(void) _PyStack_UnpackDict_FreeNoDecRef(
     PyObject *const *stack,
     PyObject *kwnames);
 

Include/internal/pycore_ceval.h

@@ -226,7 +226,7 @@ PyAPI_FUNC(int) _Py_CheckRecursiveCall(
     PyThreadState *tstate,
     const char *where);
 
-int _Py_CheckRecursiveCallPy(
+PyAPI_FUNC(int) _Py_CheckRecursiveCallPy(
     PyThreadState *tstate);
 
 static inline int _Py_EnterRecursiveCallTstate(PyThreadState *tstate,

Include/internal/pycore_code.h

@@ -262,7 +262,7 @@ extern PyObject* _PyCode_GetFreevars(PyCodeObject *);
 extern PyObject* _PyCode_GetCode(PyCodeObject *);
 
 /** API for initializing the line number tables. */
-extern int _PyCode_InitAddressRange(PyCodeObject* co, PyCodeAddressRange *bounds);
+PyAPI_FUNC(int) _PyCode_InitAddressRange(PyCodeObject* co, PyCodeAddressRange *bounds);
 
 /** Out of process API for initializing the location table. */
 extern void _PyLineTable_InitAddressRange(
@@ -272,7 +272,7 @@ extern void _PyLineTable_InitAddressRange(
     PyCodeAddressRange *range);
 
 /** API for traversing the line number table. */
-extern int _PyLineTable_NextAddressRange(PyCodeAddressRange *range);
+PyAPI_FUNC(int) _PyLineTable_NextAddressRange(PyCodeAddressRange *range);
 extern int _PyLineTable_PreviousAddressRange(PyCodeAddressRange *range);
 // This is used in dump_frame() in traceback.c without an attached tstate.
 extern int _PyCode_Addr2LineNoTstate(PyCodeObject *co, int addr);
@@ -293,33 +293,34 @@ extern void _PyCode_Clear_Executors(PyCodeObject *code);
 #define ENABLE_SPECIALIZATION_FT ENABLE_SPECIALIZATION
 #endif
 
-/* Specialization functions */
+/* Specialization functions, these are exported only for other re-generated
+ * interpreters to call */
 
-extern void _Py_Specialize_LoadSuperAttr(_PyStackRef global_super, _PyStackRef cls,
+PyAPI_FUNC(void) _Py_Specialize_LoadSuperAttr(_PyStackRef global_super, _PyStackRef cls,
                                          _Py_CODEUNIT *instr, int load_method);
-extern void _Py_Specialize_LoadAttr(_PyStackRef owner, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_LoadAttr(_PyStackRef owner, _Py_CODEUNIT *instr,
                                     PyObject *name);
-extern void _Py_Specialize_StoreAttr(_PyStackRef owner, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_StoreAttr(_PyStackRef owner, _Py_CODEUNIT *instr,
                                      PyObject *name);
-extern void _Py_Specialize_LoadGlobal(PyObject *globals, PyObject *builtins,
+PyAPI_FUNC(void) _Py_Specialize_LoadGlobal(PyObject *globals, PyObject *builtins,
                                       _Py_CODEUNIT *instr, PyObject *name);
-extern void _Py_Specialize_StoreSubscr(_PyStackRef container, _PyStackRef sub,
+PyAPI_FUNC(void) _Py_Specialize_StoreSubscr(_PyStackRef container, _PyStackRef sub,
                                        _Py_CODEUNIT *instr);
-extern void _Py_Specialize_Call(_PyStackRef callable, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_Call(_PyStackRef callable, _Py_CODEUNIT *instr,
                                 int nargs);
-extern void _Py_Specialize_CallKw(_PyStackRef callable, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_CallKw(_PyStackRef callable, _Py_CODEUNIT *instr,
                                   int nargs);
-extern void _Py_Specialize_BinaryOp(_PyStackRef lhs, _PyStackRef rhs, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_BinaryOp(_PyStackRef lhs, _PyStackRef rhs, _Py_CODEUNIT *instr,
                                     int oparg, _PyStackRef *locals);
-extern void _Py_Specialize_CompareOp(_PyStackRef lhs, _PyStackRef rhs,
+PyAPI_FUNC(void) _Py_Specialize_CompareOp(_PyStackRef lhs, _PyStackRef rhs,
                                      _Py_CODEUNIT *instr, int oparg);
-extern void _Py_Specialize_UnpackSequence(_PyStackRef seq, _Py_CODEUNIT *instr,
+PyAPI_FUNC(void) _Py_Specialize_UnpackSequence(_PyStackRef seq, _Py_CODEUNIT *instr,
                                           int oparg);
-extern void _Py_Specialize_ForIter(_PyStackRef iter, _PyStackRef null_or_index, _Py_CODEUNIT *instr, int oparg);
-extern void _Py_Specialize_Send(_PyStackRef receiver, _Py_CODEUNIT *instr);
-extern void _Py_Specialize_ToBool(_PyStackRef value, _Py_CODEUNIT *instr);
-extern void _Py_Specialize_ContainsOp(_PyStackRef value, _Py_CODEUNIT *instr);
-extern void _Py_GatherStats_GetIter(_PyStackRef iterable);
+PyAPI_FUNC(void) _Py_Specialize_ForIter(_PyStackRef iter, _PyStackRef null_or_index, _Py_CODEUNIT *instr, int oparg);
+PyAPI_FUNC(void) _Py_Specialize_Send(_PyStackRef receiver, _Py_CODEUNIT *instr);
+PyAPI_FUNC(void) _Py_Specialize_ToBool(_PyStackRef value, _Py_CODEUNIT *instr);
+PyAPI_FUNC(void) _Py_Specialize_ContainsOp(_PyStackRef value, _Py_CODEUNIT *instr);
+PyAPI_FUNC(void) _Py_GatherStats_GetIter(_PyStackRef iterable);
 
 // Utility functions for reading/writing 32/64-bit values in the inline caches.
 // Great care should be taken to ensure that these functions remain correct and
@@ -514,7 +515,7 @@ typedef struct {
 
 #define COMPARISON_NOT_EQUALS (COMPARISON_UNORDERED | COMPARISON_LESS_THAN | COMPARISON_GREATER_THAN)
 
-extern int _Py_Instrument(PyCodeObject *co, PyInterpreterState *interp);
+PyAPI_FUNC(int) _Py_Instrument(PyCodeObject *co, PyInterpreterState *interp);
 
 extern _Py_CODEUNIT _Py_GetBaseCodeUnit(PyCodeObject *code, int offset);
 

Include/internal/pycore_dict.h

@@ -144,7 +144,7 @@ PyAPI_FUNC(int) _PyDict_SetItem_KnownHash_LockHeld(PyDictObject *mp, PyObject *k
 PyAPI_FUNC(int) _PyDict_GetItemRef_KnownHash_LockHeld(PyDictObject *op, PyObject *key, Py_hash_t hash, PyObject **result);
 extern int _PyDict_GetItemRef_KnownHash(PyDictObject *op, PyObject *key, Py_hash_t hash, PyObject **result);
 extern int _PyDict_GetItemRef_Unicode_LockHeld(PyDictObject *op, PyObject *key, PyObject **result);
-extern int _PyObjectDict_SetItem(PyTypeObject *tp, PyObject *obj, PyObject **dictptr, PyObject *name, PyObject *value);
+PyAPI_FUNC(int) _PyObjectDict_SetItem(PyTypeObject *tp, PyObject *obj, PyObject **dictptr, PyObject *name, PyObject *value);
 
 extern int _PyDict_Pop_KnownHash(
     PyDictObject *dict,

Include/internal/pycore_function.h

@@ -8,7 +8,7 @@ extern "C" {
 #  error "this header requires Py_BUILD_CORE define"
 #endif
 
-extern PyObject* _PyFunction_Vectorcall(
+PyAPI_FUNC(PyObject *) _PyFunction_Vectorcall(
     PyObject *func,
     PyObject *const *stack,
     size_t nargsf,

Include/internal/pycore_genobject.h

@@ -31,7 +31,7 @@ PyAPI_FUNC(int) _PyGen_SetStopIterationValue(PyObject *);
 PyAPI_FUNC(int) _PyGen_FetchStopIterationValue(PyObject **);
 
 PyAPI_FUNC(PyObject *)_PyCoro_GetAwaitableIter(PyObject *o);
-extern PyObject *_PyAsyncGenValueWrapperNew(PyThreadState *state, PyObject *);
+PyAPI_FUNC(PyObject *)_PyAsyncGenValueWrapperNew(PyThreadState *state, PyObject *);
 
 extern PyTypeObject _PyCoroWrapper_Type;
 extern PyTypeObject _PyAsyncGenWrappedValue_Type;

Include/internal/pycore_instruments.h

@@ -33,32 +33,34 @@ int _PyMonitoring_SetEvents(int tool_id, _PyMonitoringEventSet events);
 int _PyMonitoring_SetLocalEvents(PyCodeObject *code, int tool_id, _PyMonitoringEventSet events);
 int _PyMonitoring_GetLocalEvents(PyCodeObject *code, int tool_id, _PyMonitoringEventSet *events);
 
-extern int
+
+// these are exported only for other re-generated interpreters to call
+PyAPI_FUNC(int)
 _Py_call_instrumentation(PyThreadState *tstate, int event,
     _PyInterpreterFrame *frame, _Py_CODEUNIT *instr);
 
-extern int
+PyAPI_FUNC(int)
 _Py_call_instrumentation_line(PyThreadState *tstate, _PyInterpreterFrame* frame,
                               _Py_CODEUNIT *instr, _Py_CODEUNIT *prev);
 
-extern int
+PyAPI_FUNC(int)
 _Py_call_instrumentation_instruction(
     PyThreadState *tstate, _PyInterpreterFrame* frame, _Py_CODEUNIT *instr);
 
-_Py_CODEUNIT *
+PyAPI_FUNC(_Py_CODEUNIT *)
 _Py_call_instrumentation_jump(
     _Py_CODEUNIT *instr, PyThreadState *tstate, int event,
     _PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNIT *dest);
 
-extern int
+PyAPI_FUNC(int)
 _Py_call_instrumentation_arg(PyThreadState *tstate, int event,
     _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg);
 
-extern int
+PyAPI_FUNC(int)
 _Py_call_instrumentation_2args(PyThreadState *tstate, int event,
     _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg0, PyObject *arg1);
 
-extern void
+PyAPI_FUNC(void)
 _Py_call_instrumentation_exc2(PyThreadState *tstate, int event,
     _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *arg0, PyObject *arg1);
 

Include/internal/pycore_typeobject.h

@@ -90,6 +90,9 @@ _PyType_GetModuleState(PyTypeObject *type)
 // function
 PyAPI_FUNC(PyObject *) _PyType_GetDict(PyTypeObject *);
 
+PyAPI_FUNC(PyObject *) _PyType_LookupSubclasses(PyTypeObject *);
+PyAPI_FUNC(PyObject *) _PyType_InitSubclasses(PyTypeObject *);
+
 extern PyObject * _PyType_GetBases(PyTypeObject *type);
 extern PyObject * _PyType_GetMRO(PyTypeObject *type);
 extern PyObject* _PyType_GetSubclasses(PyTypeObject *);

Objects/typeobject.c

@@ -752,6 +752,22 @@ lookup_tp_subclasses(PyTypeObject *self)
     return (PyObject *)self->tp_subclasses;
 }
 
+PyObject *
+_PyType_LookupSubclasses(PyTypeObject *self)
+{
+    return lookup_tp_subclasses(self);
+}
+
+PyObject *
+_PyType_InitSubclasses(PyTypeObject *self)
+{
+    PyObject *existing = lookup_tp_subclasses(self);
+    if (existing != NULL) {
+        return existing;
+    }
+    return init_tp_subclasses(self);
+}
+
 int
 _PyType_HasSubclasses(PyTypeObject *self)
 {