57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
|
"""This test checks for correct wait3() behavior.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import os
|
||
|
|
import subprocess
|
||
|
|
import sys
|
||
|
|
import time
|
||
|
|
import unittest
|
||
|
|
from test.fork_wait import ForkWait
|
||
|
|
from test import support
|
||
|
|
|
||
|
|
if not hasattr(os, 'fork'):
|
||
|
|
raise unittest.SkipTest("os.fork not defined")
|
||
|
|
|
||
|
|
if not hasattr(os, 'wait3'):
|
||
|
|
raise unittest.SkipTest("os.wait3 not defined")
|
||
|
|
|
||
|
|
class Wait3Test(ForkWait):
|
||
|
|
def wait_impl(self, cpid, *, exitcode):
|
||
|
|
# This many iterations can be required, since some previously run
|
||
|
|
# tests (e.g. test_ctypes) could have spawned a lot of children
|
||
|
|
# very quickly.
|
||
|
|
deadline = time.monotonic() + support.SHORT_TIMEOUT
|
||
|
|
while time.monotonic() <= deadline:
|
||
|
|
# wait3() 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, rusage = os.wait3(os.WNOHANG)
|
||
|
|
if spid == cpid:
|
||
|
|
break
|
||
|
|
time.sleep(0.1)
|
||
|
|
|
||
|
|
self.assertEqual(spid, cpid)
|
||
|
|
self.assertEqual(os.waitstatus_to_exitcode(status), exitcode)
|
||
|
|
self.assertTrue(rusage)
|
||
|
|
|
||
|
|
def test_wait3_rusage_initialized(self):
|
||
|
|
# Ensure a successful wait3() call where no child was ready to report
|
||
|
|
# its exit status does not return uninitialized memory in the rusage
|
||
|
|
# structure. See bpo-36279.
|
||
|
|
args = [sys.executable, '-c', 'import sys; sys.stdin.read()']
|
||
|
|
proc = subprocess.Popen(args, stdin=subprocess.PIPE)
|
||
|
|
try:
|
||
|
|
pid, status, rusage = os.wait3(os.WNOHANG)
|
||
|
|
self.assertEqual(0, pid)
|
||
|
|
self.assertEqual(0, status)
|
||
|
|
self.assertEqual(0, sum(rusage))
|
||
|
|
finally:
|
||
|
|
proc.stdin.close()
|
||
|
|
proc.wait()
|
||
|
|
|
||
|
|
|
||
|
|
def tearDownModule():
|
||
|
|
support.reap_children()
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
unittest.main()
|