Issue #1402: PyInterpreterState_Clear() may still invoke user code
(in deallocation of running threads, for example), so the PyGILState_Release()
function must still be functional.
On the other hand, _PyGILState_Fini() only frees memory, and can be called later.
Backport candidate, but only after some experts comment on it.
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index dced9cb..9e26536 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -202,6 +202,40 @@
t.join()
# else the thread is still running, and we have no way to kill it
+ def test_finalize_runnning_thread(self):
+ # Issue 1402: the PyGILState_Ensure / _Release functions may be called
+ # very late on python exit: on deallocation of a running thread for
+ # example.
+ try:
+ import ctypes
+ except ImportError:
+ if verbose:
+ print("test_finalize_with_runnning_thread can't import ctypes")
+ return # can't do anything
+
+ import subprocess
+ rc = subprocess.call([sys.executable, "-c", """if 1:
+ import ctypes, sys, time, thread
+
+ # Module globals are cleared before __del__ is run
+ # So we save the functions in class dict
+ class C:
+ ensure = ctypes.pythonapi.PyGILState_Ensure
+ release = ctypes.pythonapi.PyGILState_Release
+ def __del__(self):
+ state = self.ensure()
+ self.release(state)
+
+ def waitingThread():
+ x = C()
+ time.sleep(100)
+
+ thread.start_new_thread(waitingThread, ())
+ time.sleep(1) # be sure the other thread is waiting
+ sys.exit(42)
+ """])
+ self.assertEqual(rc, 42)
+
class ThreadingExceptionTests(unittest.TestCase):
# A RuntimeError should be raised if Thread.start() is called
# multiple times.