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