gh-106320: Remove private _PySys functions (#108452)

Move private functions to the internal C API (pycore_sysmodule.h):

* _PySys_GetAttr()
* _PySys_GetSizeOf()

No longer export most of these functions.

Fix also a typo in Include/cpython/optimizer.h: add a missing space.

Include/cpython/sysmodule.h

@@ -2,11 +2,6 @@
 #  error "this header file must not be included directly"
 #endif
 
-PyAPI_FUNC(PyObject *) _PySys_GetAttr(PyThreadState *tstate,
-                                      PyObject *name);
-
-PyAPI_FUNC(size_t) _PySys_GetSizeOf(PyObject *);
-
 typedef int(*Py_AuditHookFunction)(const char *, PyObject *, void *);
 
 PyAPI_FUNC(int) PySys_Audit(

Include/internal/pycore_sysmodule.h

@@ -8,6 +8,12 @@ extern "C" {
 #  error "this header requires Py_BUILD_CORE define"
 #endif
 
+// Export for '_pickle' shared extension
+PyAPI_FUNC(PyObject*) _PySys_GetAttr(PyThreadState *tstate, PyObject *name);
+
+// Export for '_pickle' shared extension
+PyAPI_FUNC(size_t) _PySys_GetSizeOf(PyObject *);
+
 extern int _PySys_Audit(
     PyThreadState *tstate,
     const char *event,

Modules/_io/bytesio.c

@@ -1,5 +1,7 @@
 #include "Python.h"
 #include "pycore_object.h"
+#include "pycore_sysmodule.h"     // _PySys_GetSizeOf()
+
 #include <stddef.h>               // offsetof()
 #include "_iomodule.h"
 

Modules/_pickle.c

@@ -17,10 +17,11 @@
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_runtime.h"       // _Py_ID()
 #include "pycore_setobject.h"     // _PySet_NextEntry()
-
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 
 #include <stdlib.h>               // strtol()
 
+
 PyDoc_STRVAR(pickle_module_doc,
 "Optimized C implementation for the Python pickle module.");
 

Modules/_threadmodule.c

@@ -9,6 +9,7 @@
 #include "pycore_moduleobject.h"  // _PyModule_GetState()
 #include "pycore_pylifecycle.h"
 #include "pycore_pystate.h"       // _PyThreadState_SetCurrent()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_weakref.h"       // _PyWeakref_GET_REF()
 
 #include <stddef.h>               // offsetof()

Modules/faulthandler.c

@@ -3,6 +3,7 @@
 #include "pycore_pyerrors.h"      // _Py_DumpExtensionModules
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_signal.h"        // Py_NSIG
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_traceback.h"     // _Py_DumpTracebackThreads
 
 #include <object.h>

Python/_warnings.c

@@ -7,6 +7,8 @@
 #include "pycore_pyerrors.h"
 #include "pycore_pylifecycle.h"   // _Py_IsInterpreterFinalizing()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
+
 #include "clinic/_warnings.c.h"
 
 #define MODULE_NAME "_warnings"

Python/bltinmodule.c

@@ -12,6 +12,7 @@
 #include "pycore_object.h"        // _Py_AddToAllObjects()
 #include "pycore_pyerrors.h"      // _PyErr_NoMemory()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include "clinic/bltinmodule.c.h"

Python/intrinsics.c

@@ -4,10 +4,11 @@
 #include "Python.h"
 #include "pycore_frame.h"
 #include "pycore_function.h"
-#include "pycore_runtime.h"
 #include "pycore_global_objects.h"
 #include "pycore_intrinsics.h"
 #include "pycore_pyerrors.h"
+#include "pycore_runtime.h"
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_typevarobject.h"
 
 

Python/sysmodule.c

@@ -31,6 +31,7 @@ Data members:
 #include "pycore_pymem.h"         // _PyMem_SetDefaultAllocator()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_structseq.h"     // _PyStructSequence_InitBuiltinWithFlags()
+#include "pycore_sysmodule.h"     // Define _PySys_GetSizeOf()
 #include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include "frameobject.h"          // PyFrame_FastToLocalsWithError()

Python/traceback.c

@@ -13,6 +13,7 @@
 #include "pycore_pyarena.h"       // _PyArena_Free()
 #include "pycore_pyerrors.h"      // _PyErr_GetRaisedException()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_traceback.h"     // EXCEPTION_TB_HEADER
 
 #include "../Parser/pegen.h"      // _PyPegen_byte_offset_to_character_offset()