From 9ad0c7b0f14c5fcda6bfae6692c88abb95502d38 Mon Sep 17 00:00:00 2001
From: Peter Hawkins <phawkins@google.com>
Date: Tue, 13 May 2025 13:38:57 -0400
Subject: gh-132641: fix race in `lru_cache` under free-threading (#133787)

Fix race in `lru_cache` by acquiring critical section on the cache object itself and call the lock held variant of dict functions to modify the underlying dict.
---
 Objects/dictobject.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'Objects/dictobject.c')

diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index ce27e47dabf..fd8ccf56324 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -2915,6 +2915,11 @@ clear_lock_held(PyObject *op)
     ASSERT_CONSISTENT(mp);
 }
 
+void
+_PyDict_Clear_LockHeld(PyObject *op) {
+    clear_lock_held(op);
+}
+
 void
 PyDict_Clear(PyObject *op)
 {
-- 
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