David Edelsohn <dje....@gmail.com> added the comment:
It seems that PyOS_AfterFork_Child() needs to do something like
PyThreadState *tstate = PyThreadState_Get();
PyObject *wr = _PyObject_CAST(tstate->on_delete_data);
PyObject *obj = PyWeakref_GET_OBJECT(wr);
lockobject *lock;
if (obj != Py_None) {
lock = (lockobject *) obj;
if (lock->locked) {
/* Leak memory on purpose. */
lock->locked = 0;
}
}
before the call to _PyEval_ReInitThreads.
Maybe encapsulate that as PyThread_ReInitThreads().
The locks in the threads in the child need to be cleared before
_PyThreadState_DeleteExcept() so that Python does not try to release the locks
in the child.
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<https://bugs.python.org/issue40092>
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