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5dd470ef1d
When signals are unblocked, pending signal ared delivered in the reverse order of their number (also on Linux, not only on FreeBSD 6). Don't sort signals by their number if signals were not blocked (test_signum).
879 lines
31 KiB
Python
879 lines
31 KiB
Python
import unittest
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from test import support
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from contextlib import closing
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import gc
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import pickle
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import select
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import signal
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import struct
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import subprocess
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import traceback
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import sys, os, time, errno
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from test.script_helper import assert_python_ok, spawn_python
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try:
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import threading
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except ImportError:
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threading = None
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if sys.platform in ('os2', 'riscos'):
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raise unittest.SkipTest("Can't test signal on %s" % sys.platform)
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class HandlerBCalled(Exception):
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pass
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def exit_subprocess():
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"""Use os._exit(0) to exit the current subprocess.
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Otherwise, the test catches the SystemExit and continues executing
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in parallel with the original test, so you wind up with an
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exponential number of tests running concurrently.
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"""
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os._exit(0)
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def ignoring_eintr(__func, *args, **kwargs):
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try:
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return __func(*args, **kwargs)
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except EnvironmentError as e:
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if e.errno != errno.EINTR:
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raise
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return None
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@unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
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class InterProcessSignalTests(unittest.TestCase):
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MAX_DURATION = 20 # Entire test should last at most 20 sec.
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def setUp(self):
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self.using_gc = gc.isenabled()
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gc.disable()
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def tearDown(self):
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if self.using_gc:
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gc.enable()
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def format_frame(self, frame, limit=None):
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return ''.join(traceback.format_stack(frame, limit=limit))
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def handlerA(self, signum, frame):
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self.a_called = True
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def handlerB(self, signum, frame):
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self.b_called = True
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raise HandlerBCalled(signum, self.format_frame(frame))
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def wait(self, child):
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"""Wait for child to finish, ignoring EINTR."""
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while True:
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try:
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child.wait()
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return
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except OSError as e:
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if e.errno != errno.EINTR:
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raise
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def run_test(self):
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# Install handlers. This function runs in a sub-process, so we
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# don't worry about re-setting the default handlers.
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signal.signal(signal.SIGHUP, self.handlerA)
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signal.signal(signal.SIGUSR1, self.handlerB)
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signal.signal(signal.SIGUSR2, signal.SIG_IGN)
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signal.signal(signal.SIGALRM, signal.default_int_handler)
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# Variables the signals will modify:
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self.a_called = False
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self.b_called = False
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# Let the sub-processes know who to send signals to.
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pid = os.getpid()
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child = ignoring_eintr(subprocess.Popen, ['kill', '-HUP', str(pid)])
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if child:
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self.wait(child)
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if not self.a_called:
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time.sleep(1) # Give the signal time to be delivered.
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self.assertTrue(self.a_called)
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self.assertFalse(self.b_called)
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self.a_called = False
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# Make sure the signal isn't delivered while the previous
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# Popen object is being destroyed, because __del__ swallows
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# exceptions.
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del child
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try:
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child = subprocess.Popen(['kill', '-USR1', str(pid)])
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# This wait should be interrupted by the signal's exception.
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self.wait(child)
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time.sleep(1) # Give the signal time to be delivered.
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self.fail('HandlerBCalled exception not thrown')
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except HandlerBCalled:
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self.assertTrue(self.b_called)
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self.assertFalse(self.a_called)
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child = ignoring_eintr(subprocess.Popen, ['kill', '-USR2', str(pid)])
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if child:
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self.wait(child) # Nothing should happen.
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try:
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signal.alarm(1)
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# The race condition in pause doesn't matter in this case,
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# since alarm is going to raise a KeyboardException, which
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# will skip the call.
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signal.pause()
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# But if another signal arrives before the alarm, pause
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# may return early.
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time.sleep(1)
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except KeyboardInterrupt:
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pass
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except:
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self.fail("Some other exception woke us from pause: %s" %
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traceback.format_exc())
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else:
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self.fail("pause returned of its own accord, and the signal"
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" didn't arrive after another second.")
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# Issue 3864, unknown if this affects earlier versions of freebsd also
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@unittest.skipIf(sys.platform=='freebsd6',
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'inter process signals not reliable (do not mix well with threading) '
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'on freebsd6')
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def test_main(self):
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# This function spawns a child process to insulate the main
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# test-running process from all the signals. It then
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# communicates with that child process over a pipe and
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# re-raises information about any exceptions the child
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# throws. The real work happens in self.run_test().
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os_done_r, os_done_w = os.pipe()
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with closing(os.fdopen(os_done_r, 'rb')) as done_r, \
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closing(os.fdopen(os_done_w, 'wb')) as done_w:
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child = os.fork()
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if child == 0:
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# In the child process; run the test and report results
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# through the pipe.
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try:
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done_r.close()
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# Have to close done_w again here because
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# exit_subprocess() will skip the enclosing with block.
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with closing(done_w):
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try:
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self.run_test()
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except:
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pickle.dump(traceback.format_exc(), done_w)
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else:
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pickle.dump(None, done_w)
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except:
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print('Uh oh, raised from pickle.')
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traceback.print_exc()
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finally:
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exit_subprocess()
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done_w.close()
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# Block for up to MAX_DURATION seconds for the test to finish.
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r, w, x = select.select([done_r], [], [], self.MAX_DURATION)
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if done_r in r:
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tb = pickle.load(done_r)
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if tb:
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self.fail(tb)
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else:
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os.kill(child, signal.SIGKILL)
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self.fail('Test deadlocked after %d seconds.' %
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self.MAX_DURATION)
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@unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
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class PosixTests(unittest.TestCase):
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def trivial_signal_handler(self, *args):
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pass
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def test_out_of_range_signal_number_raises_error(self):
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self.assertRaises(ValueError, signal.getsignal, 4242)
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self.assertRaises(ValueError, signal.signal, 4242,
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self.trivial_signal_handler)
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def test_setting_signal_handler_to_none_raises_error(self):
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self.assertRaises(TypeError, signal.signal,
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signal.SIGUSR1, None)
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def test_getsignal(self):
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hup = signal.signal(signal.SIGHUP, self.trivial_signal_handler)
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self.assertEqual(signal.getsignal(signal.SIGHUP),
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self.trivial_signal_handler)
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signal.signal(signal.SIGHUP, hup)
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self.assertEqual(signal.getsignal(signal.SIGHUP), hup)
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@unittest.skipUnless(sys.platform == "win32", "Windows specific")
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class WindowsSignalTests(unittest.TestCase):
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def test_issue9324(self):
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# Updated for issue #10003, adding SIGBREAK
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handler = lambda x, y: None
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for sig in (signal.SIGABRT, signal.SIGBREAK, signal.SIGFPE,
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signal.SIGILL, signal.SIGINT, signal.SIGSEGV,
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signal.SIGTERM):
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# Set and then reset a handler for signals that work on windows
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signal.signal(sig, signal.signal(sig, handler))
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with self.assertRaises(ValueError):
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signal.signal(-1, handler)
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with self.assertRaises(ValueError):
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signal.signal(7, handler)
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@unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
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class WakeupSignalTests(unittest.TestCase):
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def check_wakeup(self, test_body, *signals):
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# use a subprocess to have only one thread
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code = """if 1:
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import fcntl
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import os
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import signal
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import struct
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signals = {!r}
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def handler(signum, frame):
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pass
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def check_signum(signals):
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data = os.read(read, len(signals)+1)
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raised = struct.unpack('%uB' % len(data), data)
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if raised != signals:
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raise Exception("%r != %r" % (raised, signals))
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{}
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signal.signal(signal.SIGALRM, handler)
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read, write = os.pipe()
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for fd in (read, write):
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flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0)
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flags = flags | os.O_NONBLOCK
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fcntl.fcntl(fd, fcntl.F_SETFL, flags)
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signal.set_wakeup_fd(write)
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test()
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check_signum(signals)
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os.close(read)
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os.close(write)
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""".format(signals, test_body)
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assert_python_ok('-c', code)
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def test_wakeup_fd_early(self):
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self.check_wakeup("""def test():
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import select
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import time
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TIMEOUT_FULL = 10
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TIMEOUT_HALF = 5
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signal.alarm(1)
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before_time = time.time()
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# We attempt to get a signal during the sleep,
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# before select is called
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time.sleep(TIMEOUT_FULL)
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mid_time = time.time()
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dt = mid_time - before_time
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if dt >= TIMEOUT_HALF:
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raise Exception("%s >= %s" % (dt, TIMEOUT_HALF))
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select.select([read], [], [], TIMEOUT_FULL)
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after_time = time.time()
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dt = after_time - mid_time
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if dt >= TIMEOUT_HALF:
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raise Exception("%s >= %s" % (dt, TIMEOUT_HALF))
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""", signal.SIGALRM)
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def test_wakeup_fd_during(self):
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self.check_wakeup("""def test():
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import select
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import time
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TIMEOUT_FULL = 10
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TIMEOUT_HALF = 5
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signal.alarm(1)
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before_time = time.time()
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# We attempt to get a signal during the select call
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try:
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select.select([read], [], [], TIMEOUT_FULL)
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except select.error:
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pass
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else:
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raise Exception("select.error not raised")
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after_time = time.time()
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dt = after_time - before_time
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if dt >= TIMEOUT_HALF:
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raise Exception("%s >= %s" % (dt, TIMEOUT_HALF))
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""", signal.SIGALRM)
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def test_signum(self):
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self.check_wakeup("""def test():
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signal.signal(signal.SIGUSR1, handler)
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os.kill(os.getpid(), signal.SIGUSR1)
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os.kill(os.getpid(), signal.SIGALRM)
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""", signal.SIGUSR1, signal.SIGALRM)
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@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
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'need signal.pthread_sigmask()')
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def test_pending(self):
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signals = (signal.SIGUSR1, signal.SIGUSR2)
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# when signals are unblocked, pending signal ared delivered in the
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# reverse order of their number
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signals = tuple(sorted(signals, reverse=True))
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self.check_wakeup("""def test():
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signum1 = signal.SIGUSR1
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signum2 = signal.SIGUSR2
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signal.signal(signum1, handler)
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signal.signal(signum2, handler)
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signal.pthread_sigmask(signal.SIG_BLOCK, (signum1, signum2))
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os.kill(os.getpid(), signum1)
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os.kill(os.getpid(), signum2)
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# Unblocking the 2 signals calls the C signal handler twice
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signal.pthread_sigmask(signal.SIG_UNBLOCK, (signum1, signum2))
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""", *signals)
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@unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
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class SiginterruptTest(unittest.TestCase):
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def readpipe_interrupted(self, interrupt):
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"""Perform a read during which a signal will arrive. Return True if the
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read is interrupted by the signal and raises an exception. Return False
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if it returns normally.
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"""
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# use a subprocess to have only one thread, to have a timeout on the
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# blocking read and to not touch signal handling in this process
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code = """if 1:
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import errno
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import os
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import signal
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import sys
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interrupt = %r
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r, w = os.pipe()
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def handler(signum, frame):
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pass
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signal.signal(signal.SIGALRM, handler)
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if interrupt is not None:
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signal.siginterrupt(signal.SIGALRM, interrupt)
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print("ready")
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sys.stdout.flush()
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# run the test twice
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for loop in range(2):
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# send a SIGALRM in a second (during the read)
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signal.alarm(1)
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try:
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# blocking call: read from a pipe without data
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os.read(r, 1)
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except OSError as err:
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if err.errno != errno.EINTR:
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raise
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else:
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sys.exit(2)
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sys.exit(3)
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""" % (interrupt,)
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with spawn_python('-c', code) as process:
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try:
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# wait until the child process is loaded and has started
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first_line = process.stdout.readline()
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stdout, stderr = process.communicate(timeout=5.0)
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except subprocess.TimeoutExpired:
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process.kill()
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return False
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else:
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stdout = first_line + stdout
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exitcode = process.wait()
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if exitcode not in (2, 3):
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raise Exception("Child error (exit code %s): %s"
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% (exitcode, stdout))
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return (exitcode == 3)
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def test_without_siginterrupt(self):
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# If a signal handler is installed and siginterrupt is not called
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# at all, when that signal arrives, it interrupts a syscall that's in
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# progress.
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interrupted = self.readpipe_interrupted(None)
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self.assertTrue(interrupted)
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def test_siginterrupt_on(self):
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# If a signal handler is installed and siginterrupt is called with
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# a true value for the second argument, when that signal arrives, it
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# interrupts a syscall that's in progress.
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interrupted = self.readpipe_interrupted(True)
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self.assertTrue(interrupted)
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def test_siginterrupt_off(self):
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# If a signal handler is installed and siginterrupt is called with
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# a false value for the second argument, when that signal arrives, it
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# does not interrupt a syscall that's in progress.
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interrupted = self.readpipe_interrupted(False)
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self.assertFalse(interrupted)
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@unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
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class ItimerTest(unittest.TestCase):
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def setUp(self):
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self.hndl_called = False
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self.hndl_count = 0
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self.itimer = None
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self.old_alarm = signal.signal(signal.SIGALRM, self.sig_alrm)
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def tearDown(self):
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signal.signal(signal.SIGALRM, self.old_alarm)
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if self.itimer is not None: # test_itimer_exc doesn't change this attr
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# just ensure that itimer is stopped
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signal.setitimer(self.itimer, 0)
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def sig_alrm(self, *args):
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self.hndl_called = True
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def sig_vtalrm(self, *args):
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self.hndl_called = True
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if self.hndl_count > 3:
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# it shouldn't be here, because it should have been disabled.
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raise signal.ItimerError("setitimer didn't disable ITIMER_VIRTUAL "
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"timer.")
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elif self.hndl_count == 3:
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# disable ITIMER_VIRTUAL, this function shouldn't be called anymore
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signal.setitimer(signal.ITIMER_VIRTUAL, 0)
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self.hndl_count += 1
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def sig_prof(self, *args):
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self.hndl_called = True
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signal.setitimer(signal.ITIMER_PROF, 0)
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def test_itimer_exc(self):
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# XXX I'm assuming -1 is an invalid itimer, but maybe some platform
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# defines it ?
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self.assertRaises(signal.ItimerError, signal.setitimer, -1, 0)
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# Negative times are treated as zero on some platforms.
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if 0:
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self.assertRaises(signal.ItimerError,
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signal.setitimer, signal.ITIMER_REAL, -1)
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def test_itimer_real(self):
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self.itimer = signal.ITIMER_REAL
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signal.setitimer(self.itimer, 1.0)
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signal.pause()
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self.assertEqual(self.hndl_called, True)
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# Issue 3864, unknown if this affects earlier versions of freebsd also
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@unittest.skipIf(sys.platform in ('freebsd6', 'netbsd5'),
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'itimer not reliable (does not mix well with threading) on some BSDs.')
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def test_itimer_virtual(self):
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self.itimer = signal.ITIMER_VIRTUAL
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signal.signal(signal.SIGVTALRM, self.sig_vtalrm)
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signal.setitimer(self.itimer, 0.3, 0.2)
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start_time = time.time()
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while time.time() - start_time < 60.0:
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# use up some virtual time by doing real work
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_ = pow(12345, 67890, 10000019)
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if signal.getitimer(self.itimer) == (0.0, 0.0):
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break # sig_vtalrm handler stopped this itimer
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else: # Issue 8424
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self.skipTest("timeout: likely cause: machine too slow or load too "
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"high")
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# virtual itimer should be (0.0, 0.0) now
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self.assertEqual(signal.getitimer(self.itimer), (0.0, 0.0))
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# and the handler should have been called
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self.assertEqual(self.hndl_called, True)
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# Issue 3864, unknown if this affects earlier versions of freebsd also
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@unittest.skipIf(sys.platform=='freebsd6',
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'itimer not reliable (does not mix well with threading) on freebsd6')
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def test_itimer_prof(self):
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self.itimer = signal.ITIMER_PROF
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signal.signal(signal.SIGPROF, self.sig_prof)
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signal.setitimer(self.itimer, 0.2, 0.2)
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start_time = time.time()
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|
while time.time() - start_time < 60.0:
|
|
# do some work
|
|
_ = pow(12345, 67890, 10000019)
|
|
if signal.getitimer(self.itimer) == (0.0, 0.0):
|
|
break # sig_prof handler stopped this itimer
|
|
else: # Issue 8424
|
|
self.skipTest("timeout: likely cause: machine too slow or load too "
|
|
"high")
|
|
|
|
# profiling itimer should be (0.0, 0.0) now
|
|
self.assertEqual(signal.getitimer(self.itimer), (0.0, 0.0))
|
|
# and the handler should have been called
|
|
self.assertEqual(self.hndl_called, True)
|
|
|
|
|
|
class PendingSignalsTests(unittest.TestCase):
|
|
"""
|
|
Test pthread_sigmask(), pthread_kill(), sigpending() and sigwait()
|
|
functions.
|
|
"""
|
|
@unittest.skipUnless(hasattr(signal, 'sigpending'),
|
|
'need signal.sigpending()')
|
|
def test_sigpending_empty(self):
|
|
self.assertEqual(signal.sigpending(), set())
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
|
|
'need signal.pthread_sigmask()')
|
|
@unittest.skipUnless(hasattr(signal, 'sigpending'),
|
|
'need signal.sigpending()')
|
|
def test_sigpending(self):
|
|
code = """if 1:
|
|
import os
|
|
import signal
|
|
|
|
def handler(signum, frame):
|
|
1/0
|
|
|
|
signum = signal.SIGUSR1
|
|
signal.signal(signum, handler)
|
|
|
|
signal.pthread_sigmask(signal.SIG_BLOCK, [signum])
|
|
os.kill(os.getpid(), signum)
|
|
pending = signal.sigpending()
|
|
if pending != {signum}:
|
|
raise Exception('%s != {%s}' % (pending, signum))
|
|
try:
|
|
signal.pthread_sigmask(signal.SIG_UNBLOCK, [signum])
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise Exception("ZeroDivisionError not raised")
|
|
"""
|
|
assert_python_ok('-c', code)
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_kill'),
|
|
'need signal.pthread_kill()')
|
|
def test_pthread_kill(self):
|
|
code = """if 1:
|
|
import signal
|
|
import threading
|
|
import sys
|
|
|
|
signum = signal.SIGUSR1
|
|
|
|
def handler(signum, frame):
|
|
1/0
|
|
|
|
signal.signal(signum, handler)
|
|
|
|
if sys.platform == 'freebsd6':
|
|
# Issue #12392 and #12469: send a signal to the main thread
|
|
# doesn't work before the creation of the first thread on
|
|
# FreeBSD 6
|
|
def noop():
|
|
pass
|
|
thread = threading.Thread(target=noop)
|
|
thread.start()
|
|
thread.join()
|
|
|
|
tid = threading.get_ident()
|
|
try:
|
|
signal.pthread_kill(tid, signum)
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise Exception("ZeroDivisionError not raised")
|
|
"""
|
|
assert_python_ok('-c', code)
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
|
|
'need signal.pthread_sigmask()')
|
|
def wait_helper(self, blocked, test):
|
|
"""
|
|
test: body of the "def test(signum):" function.
|
|
blocked: number of the blocked signal
|
|
"""
|
|
code = '''if 1:
|
|
import signal
|
|
import sys
|
|
|
|
def handler(signum, frame):
|
|
1/0
|
|
|
|
%s
|
|
|
|
blocked = %s
|
|
signum = signal.SIGALRM
|
|
|
|
# child: block and wait the signal
|
|
try:
|
|
signal.signal(signum, handler)
|
|
signal.pthread_sigmask(signal.SIG_BLOCK, [blocked])
|
|
|
|
# Do the tests
|
|
test(signum)
|
|
|
|
# The handler must not be called on unblock
|
|
try:
|
|
signal.pthread_sigmask(signal.SIG_UNBLOCK, [blocked])
|
|
except ZeroDivisionError:
|
|
print("the signal handler has been called",
|
|
file=sys.stderr)
|
|
sys.exit(1)
|
|
except BaseException as err:
|
|
print("error: {}".format(err), file=sys.stderr)
|
|
sys.stderr.flush()
|
|
sys.exit(1)
|
|
''' % (test.strip(), blocked)
|
|
|
|
# sig*wait* must be called with the signal blocked: since the current
|
|
# process might have several threads running, use a subprocess to have
|
|
# a single thread.
|
|
assert_python_ok('-c', code)
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigwait'),
|
|
'need signal.sigwait()')
|
|
def test_sigwait(self):
|
|
self.wait_helper(signal.SIGALRM, '''
|
|
def test(signum):
|
|
signal.alarm(1)
|
|
received = signal.sigwait([signum])
|
|
if received != signum:
|
|
raise Exception('received %s, not %s' % (received, signum))
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigwaitinfo'),
|
|
'need signal.sigwaitinfo()')
|
|
def test_sigwaitinfo(self):
|
|
self.wait_helper(signal.SIGALRM, '''
|
|
def test(signum):
|
|
signal.alarm(1)
|
|
info = signal.sigwaitinfo([signum])
|
|
if info.si_signo != signum:
|
|
raise Exception("info.si_signo != %s" % signum)
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigtimedwait'),
|
|
'need signal.sigtimedwait()')
|
|
def test_sigtimedwait(self):
|
|
self.wait_helper(signal.SIGALRM, '''
|
|
def test(signum):
|
|
signal.alarm(1)
|
|
info = signal.sigtimedwait([signum], (10, 1000))
|
|
if info.si_signo != signum:
|
|
raise Exception('info.si_signo != %s' % signum)
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigtimedwait'),
|
|
'need signal.sigtimedwait()')
|
|
def test_sigtimedwait_poll(self):
|
|
# check that polling with sigtimedwait works
|
|
self.wait_helper(signal.SIGALRM, '''
|
|
def test(signum):
|
|
import os
|
|
os.kill(os.getpid(), signum)
|
|
info = signal.sigtimedwait([signum], (0, 0))
|
|
if info.si_signo != signum:
|
|
raise Exception('info.si_signo != %s' % signum)
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigtimedwait'),
|
|
'need signal.sigtimedwait()')
|
|
def test_sigtimedwait_timeout(self):
|
|
self.wait_helper(signal.SIGALRM, '''
|
|
def test(signum):
|
|
received = signal.sigtimedwait([signum], (1, 0))
|
|
if received is not None:
|
|
raise Exception("received=%r" % (received,))
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigtimedwait'),
|
|
'need signal.sigtimedwait()')
|
|
def test_sigtimedwait_negative_timeout(self):
|
|
signum = signal.SIGALRM
|
|
self.assertRaises(ValueError, signal.sigtimedwait, [signum], (-1, -1))
|
|
self.assertRaises(ValueError, signal.sigtimedwait, [signum], (0, -1))
|
|
self.assertRaises(ValueError, signal.sigtimedwait, [signum], (-1, 0))
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigwaitinfo'),
|
|
'need signal.sigwaitinfo()')
|
|
def test_sigwaitinfo_interrupted(self):
|
|
self.wait_helper(signal.SIGUSR1, '''
|
|
def test(signum):
|
|
import errno
|
|
|
|
hndl_called = True
|
|
def alarm_handler(signum, frame):
|
|
hndl_called = False
|
|
|
|
signal.signal(signal.SIGALRM, alarm_handler)
|
|
signal.alarm(1)
|
|
try:
|
|
signal.sigwaitinfo([signal.SIGUSR1])
|
|
except OSError as e:
|
|
if e.errno == errno.EINTR:
|
|
if not hndl_called:
|
|
raise Exception("SIGALRM handler not called")
|
|
else:
|
|
raise Exception("Expected EINTR to be raised by sigwaitinfo")
|
|
else:
|
|
raise Exception("Expected EINTR to be raised by sigwaitinfo")
|
|
''')
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'sigwait'),
|
|
'need signal.sigwait()')
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
|
|
'need signal.pthread_sigmask()')
|
|
@unittest.skipIf(threading is None, "test needs threading module")
|
|
def test_sigwait_thread(self):
|
|
# Check that calling sigwait() from a thread doesn't suspend the whole
|
|
# process. A new interpreter is spawned to avoid problems when mixing
|
|
# threads and fork(): only async-safe functions are allowed between
|
|
# fork() and exec().
|
|
assert_python_ok("-c", """if True:
|
|
import os, threading, sys, time, signal
|
|
|
|
# the default handler terminates the process
|
|
signum = signal.SIGUSR1
|
|
|
|
def kill_later():
|
|
# wait until the main thread is waiting in sigwait()
|
|
time.sleep(1)
|
|
os.kill(os.getpid(), signum)
|
|
|
|
# the signal must be blocked by all the threads
|
|
signal.pthread_sigmask(signal.SIG_BLOCK, [signum])
|
|
killer = threading.Thread(target=kill_later)
|
|
killer.start()
|
|
received = signal.sigwait([signum])
|
|
if received != signum:
|
|
print("sigwait() received %s, not %s" % (received, signum),
|
|
file=sys.stderr)
|
|
sys.exit(1)
|
|
killer.join()
|
|
# unblock the signal, which should have been cleared by sigwait()
|
|
signal.pthread_sigmask(signal.SIG_UNBLOCK, [signum])
|
|
""")
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
|
|
'need signal.pthread_sigmask()')
|
|
def test_pthread_sigmask_arguments(self):
|
|
self.assertRaises(TypeError, signal.pthread_sigmask)
|
|
self.assertRaises(TypeError, signal.pthread_sigmask, 1)
|
|
self.assertRaises(TypeError, signal.pthread_sigmask, 1, 2, 3)
|
|
self.assertRaises(OSError, signal.pthread_sigmask, 1700, [])
|
|
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_sigmask'),
|
|
'need signal.pthread_sigmask()')
|
|
def test_pthread_sigmask(self):
|
|
code = """if 1:
|
|
import signal
|
|
import os; import threading
|
|
|
|
def handler(signum, frame):
|
|
1/0
|
|
|
|
def kill(signum):
|
|
os.kill(os.getpid(), signum)
|
|
|
|
def read_sigmask():
|
|
return signal.pthread_sigmask(signal.SIG_BLOCK, [])
|
|
|
|
signum = signal.SIGUSR1
|
|
|
|
# Install our signal handler
|
|
old_handler = signal.signal(signum, handler)
|
|
|
|
# Unblock SIGUSR1 (and copy the old mask) to test our signal handler
|
|
old_mask = signal.pthread_sigmask(signal.SIG_UNBLOCK, [signum])
|
|
try:
|
|
kill(signum)
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise Exception("ZeroDivisionError not raised")
|
|
|
|
# Block and then raise SIGUSR1. The signal is blocked: the signal
|
|
# handler is not called, and the signal is now pending
|
|
signal.pthread_sigmask(signal.SIG_BLOCK, [signum])
|
|
kill(signum)
|
|
|
|
# Check the new mask
|
|
blocked = read_sigmask()
|
|
if signum not in blocked:
|
|
raise Exception("%s not in %s" % (signum, blocked))
|
|
if old_mask ^ blocked != {signum}:
|
|
raise Exception("%s ^ %s != {%s}" % (old_mask, blocked, signum))
|
|
|
|
# Unblock SIGUSR1
|
|
try:
|
|
# unblock the pending signal calls immediatly the signal handler
|
|
signal.pthread_sigmask(signal.SIG_UNBLOCK, [signum])
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise Exception("ZeroDivisionError not raised")
|
|
try:
|
|
kill(signum)
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
raise Exception("ZeroDivisionError not raised")
|
|
|
|
# Check the new mask
|
|
unblocked = read_sigmask()
|
|
if signum in unblocked:
|
|
raise Exception("%s in %s" % (signum, unblocked))
|
|
if blocked ^ unblocked != {signum}:
|
|
raise Exception("%s ^ %s != {%s}" % (blocked, unblocked, signum))
|
|
if old_mask != unblocked:
|
|
raise Exception("%s != %s" % (old_mask, unblocked))
|
|
"""
|
|
assert_python_ok('-c', code)
|
|
|
|
@unittest.skipIf(sys.platform == 'freebsd6',
|
|
"issue #12392: send a signal to the main thread doesn't work "
|
|
"before the creation of the first thread on FreeBSD 6")
|
|
@unittest.skipUnless(hasattr(signal, 'pthread_kill'),
|
|
'need signal.pthread_kill()')
|
|
def test_pthread_kill_main_thread(self):
|
|
# Test that a signal can be sent to the main thread with pthread_kill()
|
|
# before any other thread has been created (see issue #12392).
|
|
code = """if True:
|
|
import threading
|
|
import signal
|
|
import sys
|
|
|
|
def handler(signum, frame):
|
|
sys.exit(3)
|
|
|
|
signal.signal(signal.SIGUSR1, handler)
|
|
signal.pthread_kill(threading.get_ident(), signal.SIGUSR1)
|
|
sys.exit(2)
|
|
"""
|
|
|
|
with spawn_python('-c', code) as process:
|
|
stdout, stderr = process.communicate()
|
|
exitcode = process.wait()
|
|
if exitcode != 3:
|
|
raise Exception("Child error (exit code %s): %s" %
|
|
(exitcode, stdout))
|
|
|
|
|
|
def test_main():
|
|
try:
|
|
support.run_unittest(PosixTests, InterProcessSignalTests,
|
|
WakeupSignalTests, SiginterruptTest,
|
|
ItimerTest, WindowsSignalTests,
|
|
PendingSignalsTests)
|
|
finally:
|
|
support.reap_children()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|