Use atomic load for valid bit

mpage · mpage · commit 581869e78225 · 2024-12-18T14:13:24.000-08:00
diff --git a/Python/specialize.c b/Python/specialize.c
@@ -1042,7 +1042,7 @@ specialize_dict_access(
     }
     int result;
     if (type->tp_flags & Py_TPFLAGS_INLINE_VALUES &&
-        _PyObject_InlineValues(owner)->valid &&
+        FT_ATOMIC_LOAD_UINT8(_PyObject_InlineValues(owner)->valid) &&
         !(base_op == STORE_ATTR && _PyObject_GetManagedDict(owner) != NULL))
     {
         Py_BEGIN_CRITICAL_SECTION(owner);

Original file line number	Diff line number	Diff line change
`@@ -1042,7 +1042,7 @@ specialize_dict_access(`
`1042`	`1042`	`}`
`1043`	`1043`	`int result;`
`1044`	`1044`	`if (type->tp_flags & Py_TPFLAGS_INLINE_VALUES &&`
`1045`		`- _PyObject_InlineValues(owner)->valid &&`
	`1045`	`+ FT_ATOMIC_LOAD_UINT8(_PyObject_InlineValues(owner)->valid) &&`
`1046`	`1046`	`!(base_op == STORE_ATTR && _PyObject_GetManagedDict(owner) != NULL))`
`1047`	`1047`	`{`
`1048`	`1048`	`Py_BEGIN_CRITICAL_SECTION(owner);`