def test_frame_tstate_tracing(self): # Issue #14432: Crash when a generator is created in a C thread that is # destroyed while the generator is still used. The issue was that a # generator contains a frame, and the frame kept a reference to the # Python state of the destroyed C thread. The crash occurs when a trace # function is setup. def noop_trace(frame, event, arg): # no operation return noop_trace def generator(): while 1: yield "genereator" def callback(): if callback.gen is None: callback.gen = generator() return next(callback.gen) callback.gen = None old_trace = sys.gettrace() sys.settrace(noop_trace) try: # Install a trace function threading.settrace(noop_trace) # Create a generator in a C thread which exits after the call import _testcapi _testcapi.call_in_temporary_c_thread(callback) # Call the generator in a different Python thread, check that the # generator didn't keep a reference to the destroyed thread state for test in range(3): # The trace function is still called here callback() finally: sys.settrace(old_trace)
def test_frame_tstate_tracing(self): # Issue #14432: Crash when a generator is created in a C thread that is # destroyed while the generator is still used. The issue was that a # generator contains a frame, and the frame kept a reference to the # Python state of the destroyed C thread. The crash occurs when a trace # function is setup. def noop_trace(frame, event, arg): # no operation return noop_trace def generator(): while 1: yield "generator" def callback(): if callback.gen is None: callback.gen = generator() return next(callback.gen) callback.gen = None old_trace = sys.gettrace() sys.settrace(noop_trace) try: # Install a trace function threading.settrace(noop_trace) # Create a generator in a C thread which exits after the call import _testcapi _testcapi.call_in_temporary_c_thread(callback) # Call the generator in a different Python thread, check that the # generator didn't keep a reference to the destroyed thread state for test in range(3): # The trace function is still called here callback() finally: sys.settrace(old_trace)
def test_frame_tstate_tracing(self): def noop_trace(frame, event, arg): return noop_trace def generator(): while 1: yield 'generator' def callback(): if callback.gen is None: callback.gen = generator() return next(callback.gen) callback.gen = None old_trace = sys.gettrace() sys.settrace(noop_trace) try: threading.settrace(noop_trace) import _testcapi _testcapi.call_in_temporary_c_thread(callback) for test in range(3): callback() finally: sys.settrace(old_trace)