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gh-117657: Fix TSAN reported race in _PyEval_IsGILEnabled. (#119921)

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The GIL may be disabled concurrently with this call so we need to use a
relaxed atomic load.
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Sam Gross 2024-06-02 10:19:02 -04:00 committed by GitHub
parent f79ffc879b
commit f3b89a63cb
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2 changed files with 2 additions and 2 deletions
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3
Include/internal/pycore_ceval.h
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@ -145,7 +145,8 @@ extern void _PyEval_ReleaseLock(PyInterpreterState *, PyThreadState *,
static inline int
_PyEval_IsGILEnabled(PyThreadState *tstate)
{
return tstate->interp->ceval.gil->enabled != 0;
struct _gil_runtime_state *gil = tstate->interp->ceval.gil;
return _Py_atomic_load_int_relaxed(&gil->enabled) != 0;
}
// Enable or disable the GIL used by the interpreter that owns tstate, which

1
Tools/tsan/suppressions_free_threading.txt
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@ -65,7 +65,6 @@ race_top:list_get_item_ref
race_top:make_pending_calls
race_top:set_add_entry
race_top:should_intern_string
race_top:_PyEval_IsGILEnabled
race_top:llist_insert_tail
race_top:_Py_slot_tp_getattr_hook
race_top:add_threadstate