port: advance VC6 typeobject frontier and preserve regression coverage

2026-10-26 18:09:33 +00:00
parent 35caf1a558
commit 5ab291a68c
162 changed files with 15675 additions and 85 deletions
@@ -51,3 +51,35 @@ text = check("PyObject_Repr", (
 ), "PyObject_Repr must hoist tstate while preserving signal-check order")
 assert "PyThreadState *tstate =" not in text
 print("object PyObject_Repr C89 local and signal-check order: PASS")
+
+text = body("_PyObject_DictPointer")
+expected = '''
+    Py_ssize_t dictoffset;
+    PyTypeObject *tp = Py_TYPE(obj);
+
+    if (tp->tp_flags & Py_TPFLAGS_MANAGED_DICT) {
+        return _PyObject_ManagedDictPointer(obj);
+    }
+    dictoffset = tp->tp_dictoffset;
+    if (dictoffset == 0)
+        return NULL;
+    if (dictoffset < 0) {
+        Py_ssize_t tsize = Py_SIZE(obj);
+        size_t size;
+        if (tsize < 0) {
+            tsize = -tsize;
+        }
+        size = _PyObject_VAR_SIZE(tp, tsize);
+        assert(size <= (size_t)PY_SSIZE_T_MAX);
+        dictoffset += (Py_ssize_t)size;
+
+        _PyObject_ASSERT(obj, dictoffset > 0);
+        _PyObject_ASSERT(obj, dictoffset % SIZEOF_VOID_P == 0);
+    }
+    return (PyObject **) ((char *)obj + dictoffset);
+'''
+assert text.split() == expected.split(), (
+    "_PyObject_DictPointer must hoist only size to the block's opening declarations "
+    "and preserve the size expression and statement order"
+)
+print("object _PyObject_DictPointer C89 size declaration and offset calculation order: PASS")