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[3.13] gh-117657: Fix TSAN data race in _PyEval_SetTrace assertion (gh-131561) by miss-islington · Pull Request #131564 · python/cpython · GitHub

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[3.13] gh-117657: Fix TSAN data race in _PyEval_SetTrace assertion (gh-131561) #131564

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Merged
colesbury merged 1 commit into from
Mar 21, 2025
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[3.13] gh-117657: Fix TSAN data race in _PyEval_SetTrace assertion (gh-131561) #131564

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2 changes: 1 addition & 1 deletion Python/legacy_tracing.c
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Original file line number Diff line number Diff line change
Expand Up @@ -596,10 +596,10 @@ _PyEval_SetTrace(PyThreadState *tstate, Py_tracefunc func, PyObject *arg)
if (_PySys_Audit(current_tstate, "sys.settrace", NULL) < 0) {
return -1;
}
assert(tstate->interp->sys_tracing_threads >= 0);
// needs to be decref'd outside of the lock
PyObject *old_traceobj;
LOCK_SETUP();
assert(tstate->interp->sys_tracing_threads >= 0);
Py_ssize_t tracing_threads = setup_tracing(tstate, func, arg, &old_traceobj);
UNLOCK_SETUP();
Py_XDECREF(old_traceobj);
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