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Viewing changes to Lib/test/test_threading.py

  • Committer: Package Import Robot
  • Author(s): Matthias Klose
  • Date: 2014-01-27 12:13:57 UTC
  • mfrom: (1.2.11)
  • Revision ID: package-import@ubuntu.com-20140127121357-60ennw934dn1qirz
Tags: 3.3.4~rc1-1
Python 3.3.4 release candidate 1.

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Lib/test/test_threading.py
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import os
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from test.script_helper import assert_python_ok, assert_python_failure
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import subprocess
 
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try:
 
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    import _testcapi
 
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except ImportError:
 
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    _testcapi = None
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from test import lock_tests
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        for t in threads:
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            t.join()
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    @unittest.skipIf(_testcapi is None, "need _testcapi module")
 
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    def test_frame_tstate_tracing(self):
 
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        # Issue #14432: Crash when a generator is created in a C thread that is
 
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        # destroyed while the generator is still used. The issue was that a
 
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        # generator contains a frame, and the frame kept a reference to the
 
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        # Python state of the destroyed C thread. The crash occurs when a trace
 
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        # function is setup.
 
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        def noop_trace(frame, event, arg):
 
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            # no operation
 
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            return noop_trace
 
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        def generator():
 
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            while 1:
 
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                yield "genereator"
 
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        def callback():
 
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            if callback.gen is None:
 
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                callback.gen = generator()
 
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            return next(callback.gen)
 
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        callback.gen = None
 
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        old_trace = sys.gettrace()
 
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        sys.settrace(noop_trace)
 
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        try:
 
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            # Install a trace function
 
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            threading.settrace(noop_trace)
 
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            # Create a generator in a C thread which exits after the call
 
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            _testcapi.call_in_temporary_c_thread(callback)
 
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            # Call the generator in a different Python thread, check that the
 
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            # generator didn't keep a reference to the destroyed thread state
 
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            for test in range(3):
 
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                # The trace function is still called here
 
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                callback()
 
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        finally:
 
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            sys.settrace(old_trace)
 
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class ThreadingExceptionTests(BaseTestCase):
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    # A RuntimeError should be raised if Thread.start() is called