gh-120834: fix over-allocation in PyGenObject, PyCoroObject, PyAsyncGenObject. (...

diff --git a/Objects/genobject.c b/Objects/genobject.c
index 445622e878bc93e581eb83d243d180ac9b3cad8c..9a3194d3de2614974dcf9bcd9318e9039d2c1b6d 100644 (file)
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -813,7 +813,7 @@ static PyAsyncMethods gen_as_async = {
 PyTypeObject PyGen_Type = {
     PyVarObject_HEAD_INIT(&PyType_Type, 0)
     "generator",                                /* tp_name */
-    sizeof(PyGenObject),                        /* tp_basicsize */
+    offsetof(PyGenObject, gi_iframe.localsplus), /* tp_basicsize */
     sizeof(PyObject *),                         /* tp_itemsize */
     /* methods */
     (destructor)gen_dealloc,                    /* tp_dealloc */
@@ -1164,7 +1164,7 @@ static PyAsyncMethods coro_as_async = {
 PyTypeObject PyCoro_Type = {
     PyVarObject_HEAD_INIT(&PyType_Type, 0)
     "coroutine",                                /* tp_name */
-    sizeof(PyCoroObject),                       /* tp_basicsize */
+    offsetof(PyCoroObject, cr_iframe.localsplus),/* tp_basicsize */
     sizeof(PyObject *),                         /* tp_itemsize */
     /* methods */
     (destructor)gen_dealloc,                    /* tp_dealloc */
@@ -1579,7 +1579,7 @@ static PyAsyncMethods async_gen_as_async = {
 PyTypeObject PyAsyncGen_Type = {
     PyVarObject_HEAD_INIT(&PyType_Type, 0)
     "async_generator",                          /* tp_name */
-    sizeof(PyAsyncGenObject),                   /* tp_basicsize */
+    offsetof(PyAsyncGenObject, ag_iframe.localsplus), /* tp_basicsize */
     sizeof(PyObject *),                         /* tp_itemsize */
     /* methods */
     (destructor)gen_dealloc,                    /* tp_dealloc */