import unittest from test import support from contextlib import closing import enum import gc import pickle import select import signal import socket import struct import subprocess import traceback import sys, os, time, errno from test.support.script_helper import assert_python_ok, spawn_python try: import threading except ImportError: threading = None try: import _testcapi except ImportError: _testcapi = None class GenericTests(unittest.TestCase): @unittest.skipIf(threading is None, "test needs threading module") def test_enums(self): for name in dir(signal): sig = getattr(signal, name) if name in {'SIG_DFL', 'SIG_IGN'}: self.assertIsInstance(sig, signal.Handlers) elif name in {'SIG_BLOCK', 'SIG_UNBLOCK', 'SIG_SETMASK'}: self.assertIsInstance(sig, signal.Sigmasks) elif name.startswith('SIG') and not name.startswith('SIG_'): self.assertIsInstance(sig, signal.Signals) elif name.startswith('CTRL_'): self.assertIsInstance(sig, signal.Signals) self.assertEqual(sys.platform, "win32") @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.assertIsInstance(hup, signal.Handlers) self.assertEqual(signal.getsignal(signal.SIGHUP), self.trivial_signal_handler) signal.signal(signal.SIGHUP, hup) self.assertEqual(signal.getsignal(signal.SIGHUP), hup) # 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_interprocess_signal(self): dirname = os.path.dirname(__file__) script = os.path.join(dirname, 'signalinterproctester.py') assert_python_ok(script) @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 checked = set() 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. # Issue #18396, only for signals without a C-level handler. if signal.getsignal(sig) is not None: signal.signal(sig, signal.signal(sig, handler)) checked.add(sig) # Issue #18396: Ensure the above loop at least tested *something* self.assertTrue(checked) with self.assertRaises(ValueError): signal.signal(-1, handler) with self.assertRaises(ValueError): signal.signal(7, handler) class WakeupFDTests(unittest.TestCase): def test_invalid_fd(self): fd = support.make_bad_fd() self.assertRaises((ValueError, OSError), signal.set_wakeup_fd, fd) def test_invalid_socket(self): sock = socket.socket() fd = sock.fileno() sock.close() self.assertRaises((ValueError, OSError), signal.set_wakeup_fd, fd) def test_set_wakeup_fd_result(self): r1, w1 = os.pipe() self.addCleanup(os.close, r1) self.addCleanup(os.close, w1) r2, w2 = os.pipe() self.addCleanup(os.close, r2) self.addCleanup(os.close, w2) if hasattr(os, 'set_blocking'): os.set_blocking(w1, False) os.set_blocking(w2, False) signal.set_wakeup_fd(w1) self.assertEqual(signal.set_wakeup_fd(w2), w1) self.assertEqual(signal.set_wakeup_fd(-1), w2) self.assertEqual(signal.set_wakeup_fd(-1), -1) def test_set_wakeup_fd_socket_result(self): sock1 = socket.socket() self.addCleanup(sock1.close) sock1.setblocking(False) fd1 = sock1.fileno() sock2 = socket.socket() self.addCleanup(sock2.close) sock2.setblocking(False) fd2 = sock2.fileno() signal.set_wakeup_fd(fd1) self.assertEqual(signal.set_wakeup_fd(fd2), fd1) self.assertEqual(signal.set_wakeup_fd(-1), fd2) self.assertEqual(signal.set_wakeup_fd(-1), -1) # On Windows, files are always blocking and Windows does not provide a # function to test if a socket is in non-blocking mode. @unittest.skipIf(sys.platform == "win32", "tests specific to POSIX") def test_set_wakeup_fd_blocking(self): rfd, wfd = os.pipe() self.addCleanup(os.close, rfd) self.addCleanup(os.close, wfd) # fd must be non-blocking os.set_blocking(wfd, True) with self.assertRaises(ValueError) as cm: signal.set_wakeup_fd(wfd) self.assertEqual(str(cm.exception), "the fd %s must be in non-blocking mode" % wfd) # non-blocking is ok os.set_blocking(wfd, False) signal.set_wakeup_fd(wfd) signal.set_wakeup_fd(-1) @unittest.skipIf(sys.platform == "win32", "Not valid on Windows") class WakeupSignalTests(unittest.TestCase): @unittest.skipIf(_testcapi is None, 'need _testcapi') def check_wakeup(self, test_body, *signals, ordered=True): # use a subprocess to have only one thread code = """if 1: import _testcapi 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 not {!r}: raised = set(raised) signals = set(signals) if raised != signals: raise Exception("%r != %r" % (raised, signals)) {} signal.signal(signal.SIGALRM, handler) read, write = os.pipe() os.set_blocking(write, False) signal.set_wakeup_fd(write) test() check_signum(signals) os.close(read) os.close(write) """.format(tuple(map(int, signals)), ordered, test_body) assert_python_ok('-c', code) @unittest.skipIf(_testcapi is None, 'need _testcapi') def test_wakeup_write_error(self): # Issue #16105: write() errors in the C signal handler should not # pass silently. # Use a subprocess to have only one thread. code = """if 1: import _testcapi import errno import os import signal import sys from test.support import captured_stderr def handler(signum, frame): 1/0 signal.signal(signal.SIGALRM, handler) r, w = os.pipe() os.set_blocking(r, False) # Set wakeup_fd a read-only file descriptor to trigger the error signal.set_wakeup_fd(r) try: with captured_stderr() as err: _testcapi.raise_signal(signal.SIGALRM) except ZeroDivisionError: # An ignored exception should have been printed out on stderr err = err.getvalue() if ('Exception ignored when trying to write to the signal wakeup fd' not in err): raise AssertionError(err) if ('OSError: [Errno %d]' % errno.EBADF) not in err: raise AssertionError(err) else: raise AssertionError("ZeroDivisionError not raised") os.close(r) os.close(w) """ r, w = os.pipe() try: os.write(r, b'x') except OSError: pass else: self.skipTest("OS doesn't report write() error on the read end of a pipe") finally: os.close(r) os.close(w) 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 class InterruptSelect(Exception): pass def handler(signum, frame): raise InterruptSelect signal.signal(signal.SIGALRM, handler) signal.alarm(1) # We attempt to get a signal during the sleep, # before select is called try: select.select([], [], [], TIMEOUT_FULL) except InterruptSelect: pass else: raise Exception("select() was not interrupted") before_time = time.monotonic() select.select([read], [], [], TIMEOUT_FULL) after_time = time.monotonic() dt = after_time - before_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 class InterruptSelect(Exception): pass def handler(signum, frame): raise InterruptSelect signal.signal(signal.SIGALRM, handler) signal.alarm(1) before_time = time.monotonic() # We attempt to get a signal during the select call try: select.select([read], [], [], TIMEOUT_FULL) except InterruptSelect: pass else: raise Exception("select() was not interrupted") after_time = time.monotonic() 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(): import _testcapi signal.signal(signal.SIGUSR1, handler) _testcapi.raise_signal(signal.SIGUSR1) _testcapi.raise_signal(signal.SIGALRM) """, signal.SIGUSR1, signal.SIGALRM) @unittest.skipUnless(hasattr(signal, 'pthread_sigmask'), 'need signal.pthread_sigmask()') def test_pending(self): 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)) _testcapi.raise_signal(signum1) _testcapi.raise_signal(signum2) # Unblocking the 2 signals calls the C signal handler twice signal.pthread_sigmask(signal.SIG_UNBLOCK, (signum1, signum2)) """, signal.SIGUSR1, signal.SIGUSR2, ordered=False) @unittest.skipUnless(hasattr(socket, 'socketpair'), 'need socket.socketpair') class WakeupSocketSignalTests(unittest.TestCase): @unittest.skipIf(_testcapi is None, 'need _testcapi') def test_socket(self): # use a subprocess to have only one thread code = """if 1: import signal import socket import struct import _testcapi signum = signal.SIGINT signals = (signum,) def handler(signum, frame): pass signal.signal(signum, handler) read, write = socket.socketpair() read.setblocking(False) write.setblocking(False) signal.set_wakeup_fd(write.fileno()) _testcapi.raise_signal(signum) data = read.recv(1) if not data: raise Exception("no signum written") raised = struct.unpack('B', data) if raised != signals: raise Exception("%r != %r" % (raised, signals)) read.close() write.close() """ assert_python_ok('-c', code) @unittest.skipIf(_testcapi is None, 'need _testcapi') def test_send_error(self): # Use a subprocess to have only one thread. if os.name == 'nt': action = 'send' else: action = 'write' code = """if 1: import errno import signal import socket import sys import time import _testcapi from test.support import captured_stderr signum = signal.SIGINT def handler(signum, frame): pass signal.signal(signum, handler) read, write = socket.socketpair() read.setblocking(False) write.setblocking(False) signal.set_wakeup_fd(write.fileno()) # Close sockets: send() will fail read.close() write.close() with captured_stderr() as err: _testcapi.raise_signal(signum) err = err.getvalue() if ('Exception ignored when trying to {action} to the signal wakeup fd' not in err): raise AssertionError(err) """.format(action=action) assert_python_ok('-c', code) @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): 1 / 0 signal.signal(signal.SIGALRM, handler) if interrupt is not None: signal.siginterrupt(signal.SIGALRM, interrupt) print("ready") sys.stdout.flush() # run the test twice try: 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 ZeroDivisionError: pass else: sys.exit(2) sys.exit(3) finally: os.close(r) os.close(w) """ % (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): %r" % (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.monotonic() while time.monotonic() - 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.monotonic() while time.monotonic() - 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() for sig in pending: assert isinstance(sig, signal.Signals), repr(pending) 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 from signal import Signals 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]) assert isinstance(received, signal.Signals), received 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) 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], -1.0) @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 check_mask(mask): for sig in mask: assert isinstance(sig, signal.Signals), repr(sig) def read_sigmask(): sigmask = signal.pthread_sigmask(signal.SIG_BLOCK, []) check_mask(sigmask) return sigmask 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]) check_mask(old_mask) 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 mask = signal.pthread_sigmask(signal.SIG_BLOCK, [signum]) check_mask(mask) kill(signum) # Check the new mask blocked = read_sigmask() check_mask(blocked) 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 immediately 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 tearDownModule(): support.reap_children() if __name__ == "__main__": unittest.main()