gh-93382: Sync up co_code changes with 3.11

Include/cpython/code.h

@@ -90,7 +90,7 @@ typedef uint16_t _Py_CODEUNIT;
  PyObject *co_qualname; /* unicode (qualname, for reference) */ \
  PyObject *co_linetable; /* bytes object that holds location info */ \
  PyObject *co_weakreflist; /* to support weakrefs to code objects */ \
- void *_co_code;  /* cached co_code object/attribute */ \
+ PyObject *_co_code; /* cached co_code object/attribute */ \
  int _co_firsttraceable; /* index of first traceable instruction */ \
  char *_co_linearray; /* array of line offsets */ \
  /* Scratch space for extra data relating to the code object. \

Misc/NEWS.d/next/Core and Builtins/2022-05-31-16-36-30.gh-issue-93382.Jf6gAj.rst

@@ -1 +1,2 @@
-Speed up the :c:func:`PyCode_GetCode` function which also improves accessing the :attr:`~types.CodeType.co_code` attribute in Python.
+Cache the result of :c:func:`PyCode_GetCode` function to restore the O(1)
+lookup of the :attr:`~types.CodeType.co_code` attribute.

Objects/codeobject.c

@@ -1440,7 +1440,7 @@ _PyCode_GetCode(PyCodeObject *co)
  }
  deopt_code((_Py_CODEUNIT *)PyBytes_AS_STRING(code), Py_SIZE(co));
  assert(co->_co_code == NULL);
- co->_co_code = (void *)Py_NewRef(code);
+ co->_co_code = Py_NewRef(code);
  return code;
 }
 

Tools/scripts/deepfreeze.py

@@ -274,6 +274,7 @@ def generate_code(self, name: str, code: types.CodeType) -> str:
  self.write(f".co_name = {co_name},")
  self.write(f".co_qualname = {co_qualname},")
  self.write(f".co_linetable = {co_linetable},")
+ self.write(f"._co_code = NULL,")
  self.write("._co_linearray = NULL,")
  self.write(f".co_code_adaptive = {co_code_adaptive},")
  for i, op in enumerate(code.co_code[::2]):