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pthread/tst-cancel28: Fix barrier re-init race condition

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When running this test on the OpenRISC port I am working on this test
fails with a timeout.  The test passes when being straced or debugged.
Looking at the code there seems to be a race condition in that:

  1 main thread: calls xpthread_cancel
  2 sub thread : receives cancel signal
  3 sub thread : cleanup routine waits on barrier
  4 main thread: re-inits barrier
  5 main thread: waits on barrier

After getting to 5 the main thread and sub thread wait forever as the 2
barriers are no longer the same.

Removing the barrier re-init seems to fix this issue.  Also, the barrier
does not need to be reinitialized as that is done by default.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Stafford Horne 2021-09-25 17:02:06 +09:00 committed by Adhemerval Zanella
parent 8e2557a2b8
commit 9874ca536b
1 changed files with 0 additions and 1 deletions
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sysdeps/pthread/tst-cancel28.c
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@ -69,7 +69,6 @@ do_test (void)
xpthread_cancel (timer_thread);
xpthread_barrier_init (&barrier, NULL, 2);
xpthread_barrier_wait (&barrier);
return 0;