diff --git a/Lib/test/libregrtest/tsan.py b/Lib/test/libregrtest/tsan.py
index 90c9f0db0af2bf..74cde9f93a2cea 100644
--- a/Lib/test/libregrtest/tsan.py
+++ b/Lib/test/libregrtest/tsan.py
@@ -13,6 +13,7 @@
'test_importlib',
'test_io',
'test_logging',
+ 'test_opcache',
'test_queue',
'test_signal',
'test_socket',
diff --git a/Objects/object.c b/Objects/object.c
index f3c7fa6d906ad6..c3f57f47333a1f 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -1612,7 +1612,7 @@ _PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method)
else {
PyObject **dictptr = _PyObject_ComputedDictPointer(obj);
if (dictptr != NULL) {
- dict = *dictptr;
+ dict = FT_ATOMIC_LOAD_PTR_ACQUIRE(*dictptr);
}
else {
dict = NULL;
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index f3238da8a642e4..59ea2e3331ff54 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -1085,7 +1085,8 @@ type_modified_unlocked(PyTypeObject *type)
if (PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
// This field *must* be invalidated if the type is modified (see the
// comment on struct _specialization_cache):
- ((PyHeapTypeObject *)type)->_spec_cache.getitem = NULL;
+ FT_ATOMIC_STORE_PTR_RELAXED(
+ ((PyHeapTypeObject *)type)->_spec_cache.getitem, NULL);
}
}
@@ -1166,7 +1167,8 @@ type_mro_modified(PyTypeObject *type, PyObject *bases) {
if (PyType_HasFeature(type, Py_TPFLAGS_HEAPTYPE)) {
// This field *must* be invalidated if the type is modified (see the
// comment on struct _specialization_cache):
- ((PyHeapTypeObject *)type)->_spec_cache.getitem = NULL;
+ FT_ATOMIC_STORE_PTR_RELAXED(
+ ((PyHeapTypeObject *)type)->_spec_cache.getitem, NULL);
}
}
diff --git a/Tools/tsan/suppressions_free_threading.txt b/Tools/tsan/suppressions_free_threading.txt
index c2509cae7b9e9d..e4cf2a76db35cc 100644
--- a/Tools/tsan/suppressions_free_threading.txt
+++ b/Tools/tsan/suppressions_free_threading.txt
@@ -49,5 +49,8 @@ race_top:rangeiter_next
# gh-129748: test.test_free_threading.test_slots.TestSlots.test_object
race_top:mi_block_set_nextx
+# gh-127266: type slot updates are not thread-safe (test_opcache.test_load_attr_method_lazy_dict)
+race_top:update_one_slot
+
# https://gist.github.com/mpage/6962e8870606cfc960e159b407a0cb40
thread:pthread_create
pFad - Phonifier reborn
Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.
Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.
Alternative Proxies:
Alternative Proxy
pFad Proxy
pFad v3 Proxy
pFad v4 Proxy