author | Brendan Donegan <brendand@symbian.org> |
Thu, 01 Jul 2010 14:51:21 +0100 | |
branch | nvmemory |
changeset 81 | 0f0bbe5dfe4b |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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1 |
"""This test case provides support for checking forking and wait behavior. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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2 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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3 |
To test different wait behavior, overrise the wait_impl method. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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4 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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5 |
We want fork1() semantics -- only the forking thread survives in the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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child after a fork(). |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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7 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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8 |
On some systems (e.g. Solaris without posix threads) we find that all |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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active threads survive in the child after a fork(); this is an error. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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10 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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11 |
While BeOS doesn't officially support fork and native threading in |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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12 |
the same application, the present example should work just fine. DC |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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""" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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14 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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15 |
import os, sys, time, thread, unittest |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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16 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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LONGSLEEP = 2 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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SHORTSLEEP = 0.5 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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NUM_THREADS = 4 |
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20 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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class ForkWait(unittest.TestCase): |
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22 |
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def setUp(self): |
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self.alive = {} |
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self.stop = 0 |
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def f(self, id): |
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while not self.stop: |
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self.alive[id] = os.getpid() |
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try: |
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time.sleep(SHORTSLEEP) |
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except IOError: |
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pass |
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34 |
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def wait_impl(self, cpid): |
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for i in range(10): |
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# waitpid() shouldn't hang, but some of the buildbots seem to hang |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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# in the forking tests. This is an attempt to fix the problem. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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spid, status = os.waitpid(cpid, os.WNOHANG) |
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if spid == cpid: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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break |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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time.sleep(2 * SHORTSLEEP) |
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self.assertEquals(spid, cpid) |
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self.assertEquals(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8)) |
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def test_wait(self): |
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for i in range(NUM_THREADS): |
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thread.start_new(self.f, (i,)) |
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time.sleep(LONGSLEEP) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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a = self.alive.keys() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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a.sort() |
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self.assertEquals(a, range(NUM_THREADS)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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prefork_lives = self.alive.copy() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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if sys.platform in ['unixware7']: |
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cpid = os.fork1() |
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else: |
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cpid = os.fork() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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63 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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if cpid == 0: |
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# Child |
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time.sleep(LONGSLEEP) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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n = 0 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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for key in self.alive: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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if self.alive[key] != prefork_lives[key]: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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70 |
n += 1 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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71 |
os._exit(n) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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72 |
else: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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73 |
# Parent |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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74 |
self.wait_impl(cpid) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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75 |
# Tell threads to die |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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76 |
self.stop = 1 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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77 |
time.sleep(2*SHORTSLEEP) # Wait for threads to die |