| 1 | import unittest
|
|---|
| 2 | from test import test_support
|
|---|
| 3 | from contextlib import closing
|
|---|
| 4 | import gc
|
|---|
| 5 | import pickle
|
|---|
| 6 | import select
|
|---|
| 7 | import signal
|
|---|
| 8 | import subprocess
|
|---|
| 9 | import traceback
|
|---|
| 10 | import sys, os, time, errno
|
|---|
| 11 |
|
|---|
| 12 | if sys.platform in ('os2', 'riscos'):
|
|---|
| 13 | raise unittest.SkipTest("Can't test signal on %s" % sys.platform)
|
|---|
| 14 |
|
|---|
| 15 |
|
|---|
| 16 | class HandlerBCalled(Exception):
|
|---|
| 17 | pass
|
|---|
| 18 |
|
|---|
| 19 |
|
|---|
| 20 | def exit_subprocess():
|
|---|
| 21 | """Use os._exit(0) to exit the current subprocess.
|
|---|
| 22 |
|
|---|
| 23 | Otherwise, the test catches the SystemExit and continues executing
|
|---|
| 24 | in parallel with the original test, so you wind up with an
|
|---|
| 25 | exponential number of tests running concurrently.
|
|---|
| 26 | """
|
|---|
| 27 | os._exit(0)
|
|---|
| 28 |
|
|---|
| 29 |
|
|---|
| 30 | def ignoring_eintr(__func, *args, **kwargs):
|
|---|
| 31 | try:
|
|---|
| 32 | return __func(*args, **kwargs)
|
|---|
| 33 | except EnvironmentError as e:
|
|---|
| 34 | if e.errno != errno.EINTR:
|
|---|
| 35 | raise
|
|---|
| 36 | return None
|
|---|
| 37 |
|
|---|
| 38 |
|
|---|
| 39 | @unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
|
|---|
| 40 | class InterProcessSignalTests(unittest.TestCase):
|
|---|
| 41 | MAX_DURATION = 20 # Entire test should last at most 20 sec.
|
|---|
| 42 |
|
|---|
| 43 | def setUp(self):
|
|---|
| 44 | self.using_gc = gc.isenabled()
|
|---|
| 45 | gc.disable()
|
|---|
| 46 |
|
|---|
| 47 | def tearDown(self):
|
|---|
| 48 | if self.using_gc:
|
|---|
| 49 | gc.enable()
|
|---|
| 50 |
|
|---|
| 51 | def format_frame(self, frame, limit=None):
|
|---|
| 52 | return ''.join(traceback.format_stack(frame, limit=limit))
|
|---|
| 53 |
|
|---|
| 54 | def handlerA(self, signum, frame):
|
|---|
| 55 | self.a_called = True
|
|---|
| 56 | if test_support.verbose:
|
|---|
| 57 | print "handlerA invoked from signal %s at:\n%s" % (
|
|---|
| 58 | signum, self.format_frame(frame, limit=1))
|
|---|
| 59 |
|
|---|
| 60 | def handlerB(self, signum, frame):
|
|---|
| 61 | self.b_called = True
|
|---|
| 62 | if test_support.verbose:
|
|---|
| 63 | print "handlerB invoked from signal %s at:\n%s" % (
|
|---|
| 64 | signum, self.format_frame(frame, limit=1))
|
|---|
| 65 | raise HandlerBCalled(signum, self.format_frame(frame))
|
|---|
| 66 |
|
|---|
| 67 | def wait(self, child):
|
|---|
| 68 | """Wait for child to finish, ignoring EINTR."""
|
|---|
| 69 | while True:
|
|---|
| 70 | try:
|
|---|
| 71 | child.wait()
|
|---|
| 72 | return
|
|---|
| 73 | except OSError as e:
|
|---|
| 74 | if e.errno != errno.EINTR:
|
|---|
| 75 | raise
|
|---|
| 76 |
|
|---|
| 77 | def run_test(self):
|
|---|
| 78 | # Install handlers. This function runs in a sub-process, so we
|
|---|
| 79 | # don't worry about re-setting the default handlers.
|
|---|
| 80 | signal.signal(signal.SIGHUP, self.handlerA)
|
|---|
| 81 | signal.signal(signal.SIGUSR1, self.handlerB)
|
|---|
| 82 | signal.signal(signal.SIGUSR2, signal.SIG_IGN)
|
|---|
| 83 | signal.signal(signal.SIGALRM, signal.default_int_handler)
|
|---|
| 84 |
|
|---|
| 85 | # Variables the signals will modify:
|
|---|
| 86 | self.a_called = False
|
|---|
| 87 | self.b_called = False
|
|---|
| 88 |
|
|---|
| 89 | # Let the sub-processes know who to send signals to.
|
|---|
| 90 | pid = os.getpid()
|
|---|
| 91 | if test_support.verbose:
|
|---|
| 92 | print "test runner's pid is", pid
|
|---|
| 93 |
|
|---|
| 94 | child = ignoring_eintr(subprocess.Popen, ['kill', '-HUP', str(pid)])
|
|---|
| 95 | if child:
|
|---|
| 96 | self.wait(child)
|
|---|
| 97 | if not self.a_called:
|
|---|
| 98 | time.sleep(1) # Give the signal time to be delivered.
|
|---|
| 99 | self.assertTrue(self.a_called)
|
|---|
| 100 | self.assertFalse(self.b_called)
|
|---|
| 101 | self.a_called = False
|
|---|
| 102 |
|
|---|
| 103 | # Make sure the signal isn't delivered while the previous
|
|---|
| 104 | # Popen object is being destroyed, because __del__ swallows
|
|---|
| 105 | # exceptions.
|
|---|
| 106 | del child
|
|---|
| 107 | try:
|
|---|
| 108 | child = subprocess.Popen(['kill', '-USR1', str(pid)])
|
|---|
| 109 | # This wait should be interrupted by the signal's exception.
|
|---|
| 110 | self.wait(child)
|
|---|
| 111 | time.sleep(1) # Give the signal time to be delivered.
|
|---|
| 112 | self.fail('HandlerBCalled exception not raised')
|
|---|
| 113 | except HandlerBCalled:
|
|---|
| 114 | self.assertTrue(self.b_called)
|
|---|
| 115 | self.assertFalse(self.a_called)
|
|---|
| 116 | if test_support.verbose:
|
|---|
| 117 | print "HandlerBCalled exception caught"
|
|---|
| 118 |
|
|---|
| 119 | child = ignoring_eintr(subprocess.Popen, ['kill', '-USR2', str(pid)])
|
|---|
| 120 | if child:
|
|---|
| 121 | self.wait(child) # Nothing should happen.
|
|---|
| 122 |
|
|---|
| 123 | try:
|
|---|
| 124 | signal.alarm(1)
|
|---|
| 125 | # The race condition in pause doesn't matter in this case,
|
|---|
| 126 | # since alarm is going to raise a KeyboardException, which
|
|---|
| 127 | # will skip the call.
|
|---|
| 128 | signal.pause()
|
|---|
| 129 | # But if another signal arrives before the alarm, pause
|
|---|
| 130 | # may return early.
|
|---|
| 131 | time.sleep(1)
|
|---|
| 132 | except KeyboardInterrupt:
|
|---|
| 133 | if test_support.verbose:
|
|---|
| 134 | print "KeyboardInterrupt (the alarm() went off)"
|
|---|
| 135 | except:
|
|---|
| 136 | self.fail("Some other exception woke us from pause: %s" %
|
|---|
| 137 | traceback.format_exc())
|
|---|
| 138 | else:
|
|---|
| 139 | self.fail("pause returned of its own accord, and the signal"
|
|---|
| 140 | " didn't arrive after another second.")
|
|---|
| 141 |
|
|---|
| 142 | # Issue 3864. Unknown if this affects earlier versions of freebsd also.
|
|---|
| 143 | @unittest.skipIf(sys.platform=='freebsd6',
|
|---|
| 144 | 'inter process signals not reliable (do not mix well with threading) '
|
|---|
| 145 | 'on freebsd6')
|
|---|
| 146 | def test_main(self):
|
|---|
| 147 | # This function spawns a child process to insulate the main
|
|---|
| 148 | # test-running process from all the signals. It then
|
|---|
| 149 | # communicates with that child process over a pipe and
|
|---|
| 150 | # re-raises information about any exceptions the child
|
|---|
| 151 | # raises. The real work happens in self.run_test().
|
|---|
| 152 | os_done_r, os_done_w = os.pipe()
|
|---|
| 153 | with closing(os.fdopen(os_done_r)) as done_r, \
|
|---|
| 154 | closing(os.fdopen(os_done_w, 'w')) as done_w:
|
|---|
| 155 | child = os.fork()
|
|---|
| 156 | if child == 0:
|
|---|
| 157 | # In the child process; run the test and report results
|
|---|
| 158 | # through the pipe.
|
|---|
| 159 | try:
|
|---|
| 160 | done_r.close()
|
|---|
| 161 | # Have to close done_w again here because
|
|---|
| 162 | # exit_subprocess() will skip the enclosing with block.
|
|---|
| 163 | with closing(done_w):
|
|---|
| 164 | try:
|
|---|
| 165 | self.run_test()
|
|---|
| 166 | except:
|
|---|
| 167 | pickle.dump(traceback.format_exc(), done_w)
|
|---|
| 168 | else:
|
|---|
| 169 | pickle.dump(None, done_w)
|
|---|
| 170 | except:
|
|---|
| 171 | print 'Uh oh, raised from pickle.'
|
|---|
| 172 | traceback.print_exc()
|
|---|
| 173 | finally:
|
|---|
| 174 | exit_subprocess()
|
|---|
| 175 |
|
|---|
| 176 | done_w.close()
|
|---|
| 177 | # Block for up to MAX_DURATION seconds for the test to finish.
|
|---|
| 178 | r, w, x = select.select([done_r], [], [], self.MAX_DURATION)
|
|---|
| 179 | if done_r in r:
|
|---|
| 180 | tb = pickle.load(done_r)
|
|---|
| 181 | if tb:
|
|---|
| 182 | self.fail(tb)
|
|---|
| 183 | else:
|
|---|
| 184 | os.kill(child, signal.SIGKILL)
|
|---|
| 185 | self.fail('Test deadlocked after %d seconds.' %
|
|---|
| 186 | self.MAX_DURATION)
|
|---|
| 187 |
|
|---|
| 188 |
|
|---|
| 189 | @unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
|
|---|
| 190 | class BasicSignalTests(unittest.TestCase):
|
|---|
| 191 | def trivial_signal_handler(self, *args):
|
|---|
| 192 | pass
|
|---|
| 193 |
|
|---|
| 194 | def test_out_of_range_signal_number_raises_error(self):
|
|---|
| 195 | self.assertRaises(ValueError, signal.getsignal, 4242)
|
|---|
| 196 |
|
|---|
| 197 | self.assertRaises(ValueError, signal.signal, 4242,
|
|---|
| 198 | self.trivial_signal_handler)
|
|---|
| 199 |
|
|---|
| 200 | def test_setting_signal_handler_to_none_raises_error(self):
|
|---|
| 201 | self.assertRaises(TypeError, signal.signal,
|
|---|
| 202 | signal.SIGUSR1, None)
|
|---|
| 203 |
|
|---|
| 204 | def test_getsignal(self):
|
|---|
| 205 | hup = signal.signal(signal.SIGHUP, self.trivial_signal_handler)
|
|---|
| 206 | self.assertEqual(signal.getsignal(signal.SIGHUP),
|
|---|
| 207 | self.trivial_signal_handler)
|
|---|
| 208 | signal.signal(signal.SIGHUP, hup)
|
|---|
| 209 | self.assertEqual(signal.getsignal(signal.SIGHUP), hup)
|
|---|
| 210 |
|
|---|
| 211 |
|
|---|
| 212 | @unittest.skipUnless(sys.platform == "win32", "Windows specific")
|
|---|
| 213 | class WindowsSignalTests(unittest.TestCase):
|
|---|
| 214 | def test_issue9324(self):
|
|---|
| 215 | # Updated for issue #10003, adding SIGBREAK
|
|---|
| 216 | handler = lambda x, y: None
|
|---|
| 217 | for sig in (signal.SIGABRT, signal.SIGBREAK, signal.SIGFPE,
|
|---|
| 218 | signal.SIGILL, signal.SIGINT, signal.SIGSEGV,
|
|---|
| 219 | signal.SIGTERM):
|
|---|
| 220 | # Set and then reset a handler for signals that work on windows
|
|---|
| 221 | signal.signal(sig, signal.signal(sig, handler))
|
|---|
| 222 |
|
|---|
| 223 | with self.assertRaises(ValueError):
|
|---|
| 224 | signal.signal(-1, handler)
|
|---|
| 225 |
|
|---|
| 226 | with self.assertRaises(ValueError):
|
|---|
| 227 | signal.signal(7, handler)
|
|---|
| 228 |
|
|---|
| 229 |
|
|---|
| 230 | class WakeupFDTests(unittest.TestCase):
|
|---|
| 231 |
|
|---|
| 232 | def test_invalid_fd(self):
|
|---|
| 233 | fd = test_support.make_bad_fd()
|
|---|
| 234 | self.assertRaises(ValueError, signal.set_wakeup_fd, fd)
|
|---|
| 235 |
|
|---|
| 236 |
|
|---|
| 237 | @unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
|
|---|
| 238 | class WakeupSignalTests(unittest.TestCase):
|
|---|
| 239 | TIMEOUT_FULL = 10
|
|---|
| 240 | TIMEOUT_HALF = 5
|
|---|
| 241 |
|
|---|
| 242 | def test_wakeup_fd_early(self):
|
|---|
| 243 | import select
|
|---|
| 244 |
|
|---|
| 245 | signal.alarm(1)
|
|---|
| 246 | before_time = time.time()
|
|---|
| 247 | # We attempt to get a signal during the sleep,
|
|---|
| 248 | # before select is called
|
|---|
| 249 | time.sleep(self.TIMEOUT_FULL)
|
|---|
| 250 | mid_time = time.time()
|
|---|
| 251 | self.assertTrue(mid_time - before_time < self.TIMEOUT_HALF)
|
|---|
| 252 | select.select([self.read], [], [], self.TIMEOUT_FULL)
|
|---|
| 253 | after_time = time.time()
|
|---|
| 254 | self.assertTrue(after_time - mid_time < self.TIMEOUT_HALF)
|
|---|
| 255 |
|
|---|
| 256 | def test_wakeup_fd_during(self):
|
|---|
| 257 | import select
|
|---|
| 258 |
|
|---|
| 259 | signal.alarm(1)
|
|---|
| 260 | before_time = time.time()
|
|---|
| 261 | # We attempt to get a signal during the select call
|
|---|
| 262 | self.assertRaises(select.error, select.select,
|
|---|
| 263 | [self.read], [], [], self.TIMEOUT_FULL)
|
|---|
| 264 | after_time = time.time()
|
|---|
| 265 | self.assertTrue(after_time - before_time < self.TIMEOUT_HALF)
|
|---|
| 266 |
|
|---|
| 267 | def setUp(self):
|
|---|
| 268 | import fcntl
|
|---|
| 269 |
|
|---|
| 270 | self.alrm = signal.signal(signal.SIGALRM, lambda x,y:None)
|
|---|
| 271 | self.read, self.write = os.pipe()
|
|---|
| 272 | flags = fcntl.fcntl(self.write, fcntl.F_GETFL, 0)
|
|---|
| 273 | flags = flags | os.O_NONBLOCK
|
|---|
| 274 | fcntl.fcntl(self.write, fcntl.F_SETFL, flags)
|
|---|
| 275 | self.old_wakeup = signal.set_wakeup_fd(self.write)
|
|---|
| 276 |
|
|---|
| 277 | def tearDown(self):
|
|---|
| 278 | signal.set_wakeup_fd(self.old_wakeup)
|
|---|
| 279 | os.close(self.read)
|
|---|
| 280 | os.close(self.write)
|
|---|
| 281 | signal.signal(signal.SIGALRM, self.alrm)
|
|---|
| 282 |
|
|---|
| 283 | @unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
|
|---|
| 284 | class SiginterruptTest(unittest.TestCase):
|
|---|
| 285 |
|
|---|
| 286 | def setUp(self):
|
|---|
| 287 | """Install a no-op signal handler that can be set to allow
|
|---|
| 288 | interrupts or not, and arrange for the original signal handler to be
|
|---|
| 289 | re-installed when the test is finished.
|
|---|
| 290 | """
|
|---|
| 291 | self.signum = signal.SIGUSR1
|
|---|
| 292 | oldhandler = signal.signal(self.signum, lambda x,y: None)
|
|---|
| 293 | self.addCleanup(signal.signal, self.signum, oldhandler)
|
|---|
| 294 |
|
|---|
| 295 | def readpipe_interrupted(self):
|
|---|
| 296 | """Perform a read during which a signal will arrive. Return True if the
|
|---|
| 297 | read is interrupted by the signal and raises an exception. Return False
|
|---|
| 298 | if it returns normally.
|
|---|
| 299 | """
|
|---|
| 300 | # Create a pipe that can be used for the read. Also clean it up
|
|---|
| 301 | # when the test is over, since nothing else will (but see below for
|
|---|
| 302 | # the write end).
|
|---|
| 303 | r, w = os.pipe()
|
|---|
| 304 | self.addCleanup(os.close, r)
|
|---|
| 305 |
|
|---|
| 306 | # Create another process which can send a signal to this one to try
|
|---|
| 307 | # to interrupt the read.
|
|---|
| 308 | ppid = os.getpid()
|
|---|
| 309 | pid = os.fork()
|
|---|
| 310 |
|
|---|
| 311 | if pid == 0:
|
|---|
| 312 | # Child code: sleep to give the parent enough time to enter the
|
|---|
| 313 | # read() call (there's a race here, but it's really tricky to
|
|---|
| 314 | # eliminate it); then signal the parent process. Also, sleep
|
|---|
| 315 | # again to make it likely that the signal is delivered to the
|
|---|
| 316 | # parent process before the child exits. If the child exits
|
|---|
| 317 | # first, the write end of the pipe will be closed and the test
|
|---|
| 318 | # is invalid.
|
|---|
| 319 | try:
|
|---|
| 320 | time.sleep(0.2)
|
|---|
| 321 | os.kill(ppid, self.signum)
|
|---|
| 322 | time.sleep(0.2)
|
|---|
| 323 | finally:
|
|---|
| 324 | # No matter what, just exit as fast as possible now.
|
|---|
| 325 | exit_subprocess()
|
|---|
| 326 | else:
|
|---|
| 327 | # Parent code.
|
|---|
| 328 | # Make sure the child is eventually reaped, else it'll be a
|
|---|
| 329 | # zombie for the rest of the test suite run.
|
|---|
| 330 | self.addCleanup(os.waitpid, pid, 0)
|
|---|
| 331 |
|
|---|
| 332 | # Close the write end of the pipe. The child has a copy, so
|
|---|
| 333 | # it's not really closed until the child exits. We need it to
|
|---|
| 334 | # close when the child exits so that in the non-interrupt case
|
|---|
| 335 | # the read eventually completes, otherwise we could just close
|
|---|
| 336 | # it *after* the test.
|
|---|
| 337 | os.close(w)
|
|---|
| 338 |
|
|---|
| 339 | # Try the read and report whether it is interrupted or not to
|
|---|
| 340 | # the caller.
|
|---|
| 341 | try:
|
|---|
| 342 | d = os.read(r, 1)
|
|---|
| 343 | return False
|
|---|
| 344 | except OSError, err:
|
|---|
| 345 | if err.errno != errno.EINTR:
|
|---|
| 346 | raise
|
|---|
| 347 | return True
|
|---|
| 348 |
|
|---|
| 349 | def test_without_siginterrupt(self):
|
|---|
| 350 | """If a signal handler is installed and siginterrupt is not called
|
|---|
| 351 | at all, when that signal arrives, it interrupts a syscall that's in
|
|---|
| 352 | progress.
|
|---|
| 353 | """
|
|---|
| 354 | i = self.readpipe_interrupted()
|
|---|
| 355 | self.assertTrue(i)
|
|---|
| 356 | # Arrival of the signal shouldn't have changed anything.
|
|---|
| 357 | i = self.readpipe_interrupted()
|
|---|
| 358 | self.assertTrue(i)
|
|---|
| 359 |
|
|---|
| 360 | def test_siginterrupt_on(self):
|
|---|
| 361 | """If a signal handler is installed and siginterrupt is called with
|
|---|
| 362 | a true value for the second argument, when that signal arrives, it
|
|---|
| 363 | interrupts a syscall that's in progress.
|
|---|
| 364 | """
|
|---|
| 365 | signal.siginterrupt(self.signum, 1)
|
|---|
| 366 | i = self.readpipe_interrupted()
|
|---|
| 367 | self.assertTrue(i)
|
|---|
| 368 | # Arrival of the signal shouldn't have changed anything.
|
|---|
| 369 | i = self.readpipe_interrupted()
|
|---|
| 370 | self.assertTrue(i)
|
|---|
| 371 |
|
|---|
| 372 | def test_siginterrupt_off(self):
|
|---|
| 373 | """If a signal handler is installed and siginterrupt is called with
|
|---|
| 374 | a false value for the second argument, when that signal arrives, it
|
|---|
| 375 | does not interrupt a syscall that's in progress.
|
|---|
| 376 | """
|
|---|
| 377 | signal.siginterrupt(self.signum, 0)
|
|---|
| 378 | i = self.readpipe_interrupted()
|
|---|
| 379 | self.assertFalse(i)
|
|---|
| 380 | # Arrival of the signal shouldn't have changed anything.
|
|---|
| 381 | i = self.readpipe_interrupted()
|
|---|
| 382 | self.assertFalse(i)
|
|---|
| 383 |
|
|---|
| 384 |
|
|---|
| 385 | @unittest.skipIf(sys.platform == "win32", "Not valid on Windows")
|
|---|
| 386 | class ItimerTest(unittest.TestCase):
|
|---|
| 387 | def setUp(self):
|
|---|
| 388 | self.hndl_called = False
|
|---|
| 389 | self.hndl_count = 0
|
|---|
| 390 | self.itimer = None
|
|---|
| 391 | self.old_alarm = signal.signal(signal.SIGALRM, self.sig_alrm)
|
|---|
| 392 |
|
|---|
| 393 | def tearDown(self):
|
|---|
| 394 | signal.signal(signal.SIGALRM, self.old_alarm)
|
|---|
| 395 | if self.itimer is not None: # test_itimer_exc doesn't change this attr
|
|---|
| 396 | # just ensure that itimer is stopped
|
|---|
| 397 | signal.setitimer(self.itimer, 0)
|
|---|
| 398 |
|
|---|
| 399 | def sig_alrm(self, *args):
|
|---|
| 400 | self.hndl_called = True
|
|---|
| 401 | if test_support.verbose:
|
|---|
| 402 | print("SIGALRM handler invoked", args)
|
|---|
| 403 |
|
|---|
| 404 | def sig_vtalrm(self, *args):
|
|---|
| 405 | self.hndl_called = True
|
|---|
| 406 |
|
|---|
| 407 | if self.hndl_count > 3:
|
|---|
| 408 | # it shouldn't be here, because it should have been disabled.
|
|---|
| 409 | raise signal.ItimerError("setitimer didn't disable ITIMER_VIRTUAL "
|
|---|
| 410 | "timer.")
|
|---|
| 411 | elif self.hndl_count == 3:
|
|---|
| 412 | # disable ITIMER_VIRTUAL, this function shouldn't be called anymore
|
|---|
| 413 | signal.setitimer(signal.ITIMER_VIRTUAL, 0)
|
|---|
| 414 | if test_support.verbose:
|
|---|
| 415 | print("last SIGVTALRM handler call")
|
|---|
| 416 |
|
|---|
| 417 | self.hndl_count += 1
|
|---|
| 418 |
|
|---|
| 419 | if test_support.verbose:
|
|---|
| 420 | print("SIGVTALRM handler invoked", args)
|
|---|
| 421 |
|
|---|
| 422 | def sig_prof(self, *args):
|
|---|
| 423 | self.hndl_called = True
|
|---|
| 424 | signal.setitimer(signal.ITIMER_PROF, 0)
|
|---|
| 425 |
|
|---|
| 426 | if test_support.verbose:
|
|---|
| 427 | print("SIGPROF handler invoked", args)
|
|---|
| 428 |
|
|---|
| 429 | def test_itimer_exc(self):
|
|---|
| 430 | # XXX I'm assuming -1 is an invalid itimer, but maybe some platform
|
|---|
| 431 | # defines it ?
|
|---|
| 432 | self.assertRaises(signal.ItimerError, signal.setitimer, -1, 0)
|
|---|
| 433 | # Negative times are treated as zero on some platforms.
|
|---|
| 434 | if 0:
|
|---|
| 435 | self.assertRaises(signal.ItimerError,
|
|---|
| 436 | signal.setitimer, signal.ITIMER_REAL, -1)
|
|---|
| 437 |
|
|---|
| 438 | def test_itimer_real(self):
|
|---|
| 439 | self.itimer = signal.ITIMER_REAL
|
|---|
| 440 | signal.setitimer(self.itimer, 1.0)
|
|---|
| 441 | if test_support.verbose:
|
|---|
| 442 | print("\ncall pause()...")
|
|---|
| 443 | signal.pause()
|
|---|
| 444 |
|
|---|
| 445 | self.assertEqual(self.hndl_called, True)
|
|---|
| 446 |
|
|---|
| 447 | # Issue 3864. Unknown if this affects earlier versions of freebsd also.
|
|---|
| 448 | @unittest.skipIf(sys.platform in ('freebsd6', 'netbsd5'),
|
|---|
| 449 | 'itimer not reliable (does not mix well with threading) on some BSDs.')
|
|---|
| 450 | def test_itimer_virtual(self):
|
|---|
| 451 | self.itimer = signal.ITIMER_VIRTUAL
|
|---|
| 452 | signal.signal(signal.SIGVTALRM, self.sig_vtalrm)
|
|---|
| 453 | signal.setitimer(self.itimer, 0.3, 0.2)
|
|---|
| 454 |
|
|---|
| 455 | start_time = time.time()
|
|---|
| 456 | while time.time() - start_time < 60.0:
|
|---|
| 457 | # use up some virtual time by doing real work
|
|---|
| 458 | _ = pow(12345, 67890, 10000019)
|
|---|
| 459 | if signal.getitimer(self.itimer) == (0.0, 0.0):
|
|---|
| 460 | break # sig_vtalrm handler stopped this itimer
|
|---|
| 461 | else: # Issue 8424
|
|---|
| 462 | self.skipTest("timeout: likely cause: machine too slow or load too "
|
|---|
| 463 | "high")
|
|---|
| 464 |
|
|---|
| 465 | # virtual itimer should be (0.0, 0.0) now
|
|---|
| 466 | self.assertEqual(signal.getitimer(self.itimer), (0.0, 0.0))
|
|---|
| 467 | # and the handler should have been called
|
|---|
| 468 | self.assertEqual(self.hndl_called, True)
|
|---|
| 469 |
|
|---|
| 470 | # Issue 3864. Unknown if this affects earlier versions of freebsd also.
|
|---|
| 471 | @unittest.skipIf(sys.platform=='freebsd6',
|
|---|
| 472 | 'itimer not reliable (does not mix well with threading) on freebsd6')
|
|---|
| 473 | def test_itimer_prof(self):
|
|---|
| 474 | self.itimer = signal.ITIMER_PROF
|
|---|
| 475 | signal.signal(signal.SIGPROF, self.sig_prof)
|
|---|
| 476 | signal.setitimer(self.itimer, 0.2, 0.2)
|
|---|
| 477 |
|
|---|
| 478 | start_time = time.time()
|
|---|
| 479 | while time.time() - start_time < 60.0:
|
|---|
| 480 | # do some work
|
|---|
| 481 | _ = pow(12345, 67890, 10000019)
|
|---|
| 482 | if signal.getitimer(self.itimer) == (0.0, 0.0):
|
|---|
| 483 | break # sig_prof handler stopped this itimer
|
|---|
| 484 | else: # Issue 8424
|
|---|
| 485 | self.skipTest("timeout: likely cause: machine too slow or load too "
|
|---|
| 486 | "high")
|
|---|
| 487 |
|
|---|
| 488 | # profiling itimer should be (0.0, 0.0) now
|
|---|
| 489 | self.assertEqual(signal.getitimer(self.itimer), (0.0, 0.0))
|
|---|
| 490 | # and the handler should have been called
|
|---|
| 491 | self.assertEqual(self.hndl_called, True)
|
|---|
| 492 |
|
|---|
| 493 | def test_main():
|
|---|
| 494 | test_support.run_unittest(BasicSignalTests, InterProcessSignalTests,
|
|---|
| 495 | WakeupFDTests, WakeupSignalTests,
|
|---|
| 496 | SiginterruptTest, ItimerTest,
|
|---|
| 497 | WindowsSignalTests)
|
|---|
| 498 |
|
|---|
| 499 |
|
|---|
| 500 | if __name__ == "__main__":
|
|---|
| 501 | test_main()
|
|---|
