You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.5 KiB
Python
92 lines
3.5 KiB
Python
'''Test for GitHub issues 461 and 471.
|
|
|
|
When moving to Python 3, handling of KeyboardInterrupt exceptions caused
|
|
by a Ctrl-C raised an exception while printing the traceback for a
|
|
greenlet preventing the process from exiting. This test tests for proper
|
|
handling of KeyboardInterrupt.
|
|
'''
|
|
|
|
import sys
|
|
|
|
if sys.argv[1:] == ['subprocess']: # pragma: no cover
|
|
import gevent
|
|
|
|
def task():
|
|
sys.stdout.write('ready\n')
|
|
sys.stdout.flush()
|
|
gevent.sleep(30)
|
|
|
|
try:
|
|
gevent.spawn(task).get()
|
|
except KeyboardInterrupt:
|
|
pass
|
|
|
|
sys.exit(0)
|
|
|
|
else:
|
|
import signal
|
|
from subprocess import Popen, PIPE
|
|
import time
|
|
|
|
import unittest
|
|
import gevent.testing as greentest
|
|
from gevent.testing.sysinfo import CFFI_BACKEND
|
|
from gevent.testing.sysinfo import RUN_COVERAGE
|
|
from gevent.testing.sysinfo import WIN
|
|
|
|
class Test(unittest.TestCase):
|
|
|
|
@unittest.skipIf(CFFI_BACKEND and RUN_COVERAGE,
|
|
"Interferes with the timing")
|
|
def test_hang(self):
|
|
|
|
if WIN:
|
|
from subprocess import CREATE_NEW_PROCESS_GROUP
|
|
kwargs = {'creationflags': CREATE_NEW_PROCESS_GROUP}
|
|
else:
|
|
kwargs = {}
|
|
p = Popen([sys.executable, __file__, 'subprocess'], stdout=PIPE, **kwargs)
|
|
line = p.stdout.readline()
|
|
if not isinstance(line, str):
|
|
line = line.decode('ascii')
|
|
# Windows needs the \n in the string to write (because of buffering), but
|
|
# because of newline handling it doesn't make it through the read; whereas
|
|
# it does on other platforms. Universal newlines is broken on Py3, so the best
|
|
# thing to do is to strip it
|
|
line = line.strip()
|
|
self.assertEqual(line, 'ready')
|
|
# On Windows, we have to send the CTRL_BREAK_EVENT (which seems to terminate the process); SIGINT triggers
|
|
# "ValueError: Unsupported signal: 2". The CTRL_C_EVENT is ignored on Python 3 (but not Python 2).
|
|
# So this test doesn't test much on Windows.
|
|
signal_to_send = signal.SIGINT if not WIN else getattr(signal, 'CTRL_BREAK_EVENT')
|
|
p.send_signal(signal_to_send)
|
|
# Wait a few seconds for child process to die. Sometimes signal delivery is delayed
|
|
# or even swallowed by Python, so send the signal a few more times if necessary
|
|
wait_seconds = 15.0
|
|
now = time.time()
|
|
midtime = now + (wait_seconds / 2.0)
|
|
endtime = time.time() + wait_seconds
|
|
while time.time() < endtime:
|
|
if p.poll() is not None:
|
|
break
|
|
if time.time() > midtime:
|
|
p.send_signal(signal_to_send)
|
|
midtime = endtime + 1 # only once
|
|
time.sleep(0.1)
|
|
else:
|
|
# Kill unresponsive child and exit with error 1
|
|
p.terminate()
|
|
p.wait()
|
|
raise AssertionError("Failed to wait for child")
|
|
|
|
# If we get here, it's because we caused the process to exit; it
|
|
# didn't hang. Under Windows, however, we have to use CTRL_BREAK_EVENT,
|
|
# which has an arbitrary returncode depending on versions (so does CTRL_C_EVENT
|
|
# on Python 2). We still
|
|
# count this as success.
|
|
self.assertEqual(p.returncode if not WIN else 0, 0)
|
|
p.stdout.close()
|
|
|
|
if __name__ == '__main__':
|
|
greentest.main()
|