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Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*

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APIs, to avoid a crash with the pthread implementation in RHEL 5.  Patch
by Charles-François Natali.
This commit is contained in:
Antoine Pitrou 2011-04-27 19:28:05 +02:00
parent 43ae619925
commit 0c759febb6
4 changed files with 23 additions and 0 deletions
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17
Python/pystate.c
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@ -585,6 +585,23 @@ _PyGILState_Fini(void)
autoInterpreterState = NULL;
}
/* Reset the TLS key - called by PyOS_AfterFork.
* This should not be necessary, but some - buggy - pthread implementations
* don't flush TLS on fork, see issue #10517.
*/
void
_PyGILState_Reinit(void)
{
PyThreadState *tstate = PyGILState_GetThisThreadState();
PyThread_delete_key(autoTLSkey);
if ((autoTLSkey = PyThread_create_key()) == -1)
Py_FatalError("Could not allocate TLS entry");
/* re-associate the current thread state with the new key */
if (PyThread_set_key_value(autoTLSkey, (void *)tstate) < 0)
Py_FatalError("Couldn't create autoTLSkey mapping");
}
/* When a thread state is created for a thread by some mechanism other than
PyGILState_Ensure, it's important that the GILState machinery knows about
it so it doesn't try to create another thread state for the thread (this is