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gh-117657: use relaxed loads for checking dict keys immortality (#118067) 

Use relaxed load to check if dictkeys are immortal
This commit is contained in:
Dino Viehland 2024-04-19 09:25:08 -07:00 committed by GitHub
parent 8d4a244f15
commit 1e4a4c4897
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GPG Key ID: B5690EEEBB952194
2 changed files with 2 additions and 4 deletions
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4
Objects/dictobject.c
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@ -441,7 +441,7 @@ static void free_keys_object(PyDictKeysObject *keys, bool use_qsbr);
static inline void
dictkeys_incref(PyDictKeysObject *dk)
{
if (dk->dk_refcnt == _Py_IMMORTAL_REFCNT) {
if (FT_ATOMIC_LOAD_SSIZE_RELAXED(dk->dk_refcnt) == _Py_IMMORTAL_REFCNT) {
return;
}
#ifdef Py_REF_DEBUG
@ -453,7 +453,7 @@ dictkeys_incref(PyDictKeysObject *dk)
static inline void
dictkeys_decref(PyInterpreterState *interp, PyDictKeysObject *dk, bool use_qsbr)
{
if (dk->dk_refcnt == _Py_IMMORTAL_REFCNT) {
if (FT_ATOMIC_LOAD_SSIZE_RELAXED(dk->dk_refcnt) == _Py_IMMORTAL_REFCNT) {
return;
}
assert(dk->dk_refcnt > 0);

2
Tools/tsan/suppressions_free_threading.txt
View File

@ -29,8 +29,6 @@ race:_PyType_HasFeature
race:assign_version_tag
race:compare_unicode_unicode
race:delitem_common
race:dictkeys_decref
race:dictkeys_incref
race:dictresize
race:gc_collect_main
race:gc_restore_tid