4710c53dca
These files are a subset of the python-2.7.2.tgz distribution from python.org. Changed files from PyMod-2.7.2 have been copied into the corresponding directories of this tree, replacing the original files in the distribution. Signed-off-by: daryl.mcdaniel@intel.com git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13197 6f19259b-4bc3-4df7-8a09-765794883524
72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
"""This test checks for correct fork() behavior.
|
|
"""
|
|
|
|
import imp
|
|
import os
|
|
import signal
|
|
import sys
|
|
import time
|
|
|
|
from test.fork_wait import ForkWait
|
|
from test.test_support import run_unittest, reap_children, get_attribute, import_module
|
|
threading = import_module('threading')
|
|
|
|
#Skip test if fork does not exist.
|
|
get_attribute(os, 'fork')
|
|
|
|
|
|
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_import_lock_fork(self):
|
|
import_started = threading.Event()
|
|
fake_module_name = "fake test module"
|
|
partial_module = "partial"
|
|
complete_module = "complete"
|
|
def importer():
|
|
imp.acquire_lock()
|
|
sys.modules[fake_module_name] = partial_module
|
|
import_started.set()
|
|
time.sleep(0.01) # Give the other thread time to try and acquire.
|
|
sys.modules[fake_module_name] = complete_module
|
|
imp.release_lock()
|
|
t = threading.Thread(target=importer)
|
|
t.start()
|
|
import_started.wait()
|
|
pid = os.fork()
|
|
try:
|
|
if not pid:
|
|
m = __import__(fake_module_name)
|
|
if m == complete_module:
|
|
os._exit(0)
|
|
else:
|
|
os._exit(1)
|
|
else:
|
|
t.join()
|
|
# Exitcode 1 means the child got a partial module (bad.) No
|
|
# exitcode (but a hang, which manifests as 'got pid 0')
|
|
# means the child deadlocked (also bad.)
|
|
self.wait_impl(pid)
|
|
finally:
|
|
try:
|
|
os.kill(pid, signal.SIGKILL)
|
|
except OSError:
|
|
pass
|
|
|
|
def test_main():
|
|
run_unittest(ForkTest)
|
|
reap_children()
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|