port: expand VC6 C89 core frontier

2026-10-03 17:47:57 +00:00
parent 9221a2ee0e
commit 35caf1a558
15 changed files with 5972 additions and 11 deletions
@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""Focused Visual C++ 6.0 C89 regression checks for object.c."""
+
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1]).read_text()
+
+
+def body(name):
+    found = re.search(re.escape(name) + r"\s*\([^;]*\)\s*\{(?P<body>.*?)\n\}", source, re.S)
+    assert found, name + " definition not found"
+    return found.group("body")
+
+
+def check(name, tokens, message):
+    text = body(name)
+    positions = [text.find(token) for token in tokens]
+    assert all(position >= 0 for position in positions) and positions == sorted(positions), message
+    return text
+
+
+text = check("PyObject_CallFinalizerFromDealloc", (
+    "Py_ssize_t refcnt;",
+    "if (Py_REFCNT(self) != 0)",
+    "refcnt = Py_REFCNT(self);",
+    "_Py_NewReference(self);",
+    "Py_SET_REFCNT(self, refcnt);",
+), "PyObject_CallFinalizerFromDealloc must hoist refcnt while preserving resurrection order")
+assert "Py_ssize_t refcnt =" not in text
+print("object PyObject_CallFinalizerFromDealloc C89 local and refcount order: PASS")
+
+text = check("_PyObject_Dump", (
+    "PyTypeObject *type;",
+    "PyGILState_STATE gil;",
+    "PyObject *error_type, *error_value, *error_traceback;",
+    "if (_PyObject_IsFreed(op))",
+    "type = Py_TYPE(op);",
+    "gil = PyGILState_Ensure();",
+    "PyErr_Fetch(&error_type, &error_value, &error_traceback);",
+), "_PyObject_Dump must hoist locals without changing diagnostics or exception preservation")
+assert "PyTypeObject *type =" not in text and "PyGILState_STATE gil =" not in text
+print("object _PyObject_Dump C89 locals and exception preservation: PASS")
+
+text = check("PyObject_Repr", (
+    "PyObject *res;",
+    "PyThreadState *tstate;",
+    "if (PyErr_CheckSignals())",
+    "tstate = _PyThreadState_GET();",
+), "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")