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
@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+"""Guard the entry locals and evaluation order in _PyObject_FunctionStr."""
+
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1]).read_text()
+found = re.search(
+    r"\n_PyObject_FunctionStr\(PyObject \*x\)\s*\{(?P<body>.*?)\n\}",
+    source,
+    re.S,
+)
+assert found, "_PyObject_FunctionStr definition not found"
+body = found.group("body")
+for name in ("module", "result"):
+    declarations = re.findall(r"\bPyObject\s*\*\s*" + name + r"\b", body)
+    assert len(declarations) == 1, (
+        f"_PyObject_FunctionStr must declare {name} exactly once at entry; "
+        f"found {len(declarations)} declarations"
+    )
+
+tokens = (
+    "PyObject *module;",
+    "PyObject *result;",
+    "int ret;",
+    "assert(!PyErr_Occurred());",
+    "ret = _PyObject_LookupAttr(x, &_Py_ID(__qualname__), &qualname);",
+    "if (qualname == NULL)",
+    "return PyObject_Str(x);",
+    "result = NULL;",
+    "ret = _PyObject_LookupAttr(x, &_Py_ID(__module__), &module);",
+    "ret = PyObject_RichCompareBool(module, &_Py_ID(builtins), Py_NE);",
+    'result = PyUnicode_FromFormat("%S.%S()", module, qualname);',
+    'result = PyUnicode_FromFormat("%S()", qualname);',
+    "Py_DECREF(qualname);",
+    "Py_XDECREF(module);",
+    "return result;",
+)
+positions = [body.find(token) for token in tokens]
+assert all(position >= 0 for position in positions) and positions == sorted(positions), (
+    "_PyObject_FunctionStr must keep locals at entry and preserve evaluation/statement order"
+)
+print("object _PyObject_FunctionStr unique C89 locals and evaluation order: PASS")