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Diffstat (limited to 'Lib/test/test_threading.py')
| -rw-r--r-- | Lib/test/test_threading.py | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py index db440d42f81..864cea313ae 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -469,6 +469,35 @@ class ThreadTests(BaseTestCase): t = threading.Thread(daemon=True) self.assertTrue(t.daemon) + @unittest.skipUnless(hasattr(os, 'fork'), 'needs os.fork()') + def test_fork_at_exit(self): + # bpo-42350: Calling os.fork() after threading._shutdown() must + # not log an error. + code = textwrap.dedent(""" + import atexit + import os + import sys + from test.support import wait_process + + # Import the threading module to register its "at fork" callback + import threading + + def exit_handler(): + pid = os.fork() + if not pid: + print("child process ok", file=sys.stderr, flush=True) + # child process + sys.exit() + else: + wait_process(pid, exitcode=0) + + # exit_handler() will be called after threading._shutdown() + atexit.register(exit_handler) + """) + _, out, err = assert_python_ok("-c", code) + self.assertEqual(out, b'') + self.assertEqual(err.rstrip(), b'child process ok') + @unittest.skipUnless(hasattr(os, 'fork'), 'test needs fork()') def test_dummy_thread_after_fork(self): # Issue #14308: a dummy thread in the active list doesn't mess up |