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avoid a deadlock with the interpreter head lock and the GIL during finalization

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Benjamin Peterson 2014-06-16 23:07:49 -07:00
parent 17548dda51
commit 068f81e115
1 changed files with 8 additions and 0 deletions
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8
Python/pystate.c
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@ -423,6 +423,14 @@ PyThreadState_DeleteCurrent()
Py_FatalError( Py_FatalError(
"PyThreadState_DeleteCurrent: no current tstate"); "PyThreadState_DeleteCurrent: no current tstate");
_Py_atomic_store_relaxed(&_PyThreadState_Current, NULL); _Py_atomic_store_relaxed(&_PyThreadState_Current, NULL);
/*
Only call tstate_delete_common to have the tstate if we're not finalizing
or we're the main thread. The main thread will do this for us. Not calling
tstate_delete_common means we won't lock the interpreter head lock,
avoiding a possible deadlock with the GIL.
*/
if (!_Py_Finalizing || _Py_Finalizing == tstate)
tstate_delete_common(tstate);
if (autoInterpreterState && PyThread_get_key_value(autoTLSkey) == tstate) if (autoInterpreterState && PyThread_get_key_value(autoTLSkey) == tstate)
PyThread_delete_key_value(autoTLSkey); PyThread_delete_key_value(autoTLSkey);
tstate_delete_common(tstate); tstate_delete_common(tstate);