gh-112075: Make instance attributes stored in inline "dict" thread safe (#114742)

Make instance attributes stored in inline "dict" thread safe on free-threaded builds

1 files changed, 7 insertions, 8 deletions

diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index c1fbd3c..b7511b9 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -1947,15 +1947,13 @@ dummy_func(
 
         op(_CHECK_ATTR_WITH_HINT, (owner -- owner)) {
             assert(Py_TYPE(owner)->tp_flags & Py_TPFLAGS_MANAGED_DICT);
-            PyManagedDictPointer *managed_dict = _PyObject_ManagedDictPointer(owner);
-            PyDictObject *dict = managed_dict->dict;
+            PyDictObject *dict = _PyObject_GetManagedDict(owner);
             DEOPT_IF(dict == NULL);
             assert(PyDict_CheckExact((PyObject *)dict));
         }
 
         op(_LOAD_ATTR_WITH_HINT, (hint/1, owner -- attr, null if (oparg & 1))) {
-            PyManagedDictPointer *managed_dict = _PyObject_ManagedDictPointer(owner);
-            PyDictObject *dict = managed_dict->dict;
+            PyDictObject *dict = _PyObject_GetManagedDict(owner);
             DEOPT_IF(hint >= (size_t)dict->ma_keys->dk_nentries);
             PyObject *name = GETITEM(FRAME_CO_NAMES, oparg>>1);
             if (DK_IS_UNICODE(dict->ma_keys)) {
@@ -2072,14 +2070,15 @@ dummy_func(
         op(_GUARD_DORV_NO_DICT, (owner -- owner)) {
             assert(Py_TYPE(owner)->tp_dictoffset < 0);
             assert(Py_TYPE(owner)->tp_flags & Py_TPFLAGS_INLINE_VALUES);
-            DEOPT_IF(_PyObject_ManagedDictPointer(owner)->dict);
+            DEOPT_IF(_PyObject_GetManagedDict(owner));
             DEOPT_IF(_PyObject_InlineValues(owner)->valid == 0);
         }
 
         op(_STORE_ATTR_INSTANCE_VALUE, (index/1, value, owner --)) {
             STAT_INC(STORE_ATTR, hit);
-            assert(_PyObject_ManagedDictPointer(owner)->dict == NULL);
+            assert(_PyObject_GetManagedDict(owner) == NULL);
             PyDictValues *values = _PyObject_InlineValues(owner);
+
             PyObject *old_value = values->values[index];
             values->values[index] = value;
             if (old_value == NULL) {
@@ -2088,6 +2087,7 @@ dummy_func(
             else {
                 Py_DECREF(old_value);
             }
+
             Py_DECREF(owner);
         }
 
@@ -2102,8 +2102,7 @@ dummy_func(
             assert(type_version != 0);
             DEOPT_IF(tp->tp_version_tag != type_version);
             assert(tp->tp_flags & Py_TPFLAGS_MANAGED_DICT);
-            PyManagedDictPointer *managed_dict = _PyObject_ManagedDictPointer(owner);
-            PyDictObject *dict = managed_dict->dict;
+            PyDictObject *dict = _PyObject_GetManagedDict(owner);
             DEOPT_IF(dict == NULL);
             assert(PyDict_CheckExact((PyObject *)dict));
             PyObject *name = GETITEM(FRAME_CO_NAMES, oparg);