Adjust a test to cope with 3.14 tuple changes

PyTupleObject now includes a cached hash. Adjust our heuristics about
how to find the items inside a tuple.

Author: godlygeek

tests/integration/test_local_variables.py

@@ -582,6 +582,10 @@ class TupleObject(ctypes.Structure):
     _fields_ = [
         ("ob_type", ctypes.c_void_p),
         ("ob_size", ctypes.c_ssize_t),
+    ]
+
+class TupleItems(ctypes.Structure):
+    _fields_ = [
         ("ob_item0", ctypes.c_void_p),
         ("ob_item1", ctypes.c_void_p),
     ]
@@ -590,15 +594,19 @@ def ob_type_field(obj):
     # Assume ob_type is the last field of PyObject
     return id(obj) + sys.getsizeof(None) - ctypes.sizeof(ctypes.c_void_p)
 
+def tuple_ob_items_field(tup):
+    assert isinstance(tup, tuple)
+    return id(tup) + sys.getsizeof(()) - sys.getsizeof(None)
+
 def main():
     bad_type = (1, 2, 3)
     bad_elem = (4, 5, 6)
     nullelem = (7, 8, 9)
     bad_list = [0, 1, 2]
 
     TupleObject.from_address(ob_type_field(bad_type)).ob_type = 0xded
-    TupleObject.from_address(ob_type_field(bad_elem)).ob_item1 = 0xbad
-    TupleObject.from_address(ob_type_field(nullelem)).ob_item1 = 0x0
+    TupleItems.from_address(tuple_ob_items_field(bad_elem)).ob_item1 = 0xbad
+    TupleItems.from_address(tuple_ob_items_field(nullelem)).ob_item1 = 0x0
     ListObject.from_address(ob_type_field(bad_list)).ob_item = 0x0
 
     fifo = sys.argv[1]