"""This test checks for correct fork() behavior.
"""
import os
import time
from test.fork_wait import ForkWait
from test.test_support import TestSkipped, run_unittest, reap_children
try:
os.fork
except AttributeError:
raise TestSkipped, "os.fork not defined -- skipping test_fork1"
class ForkTest(ForkWait):
def wait_impl(self, cpid):
for i in range(10):
# waitpid() shouldn't hang, but some of the buildbots seem to hang
# in the forking tests. This is an attempt to fix the problem.
spid, status = os.waitpid(cpid, os.WNOHANG)
if spid == cpid:
break
time.sleep(1.0)
self.assertEqual(spid, cpid)
self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
def test_main():
run_unittest(ForkTest)
reap_children()
if __name__ == "__main__":
test_main()-
Neal Norwitz yazdı
The hppa ubuntu box sometimes hangs forever in these tests. My guess is that the wait is failing for some reason. Use WNOHANG, so we won't wait until the buildbot kills the test suite. I haven't been able to reproduce the failure, so I'm not sure if this will help or not. Hopefully, this change will cause the test to fail, rather than hang. That will be better since we will get the rest of the test results. It may also help us debug the real problem. *** The reason this originally failed was because there were many zombie children outstanding before rev 47158 cleaned them up. There are still hangs in test_subprocess that need to be addressed, but that will take more work. This should close some holes.
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