Hi,

I report a couple of "UNRESOLVED" failures of open_posix_testsuite in ltp
and send a patch for them.

I got following failures while executing open_posix_testsuite.

> conformance/interfaces/pthread_setschedparam/5-1: execution: UNRESOLVED: Output: 
> [07:16:29]Test conformance/interfaces/pthread_setschedparam/5-1.c unresolved: got 22 (Invalid argument) on line 152 (Sem_post in signal handler 1)

> conformance/interfaces/pthread_detach/4-3: execution: UNRESOLVED: Output:
> *snip*
> [12:05:38]Test conformance/interfaces/pthread_detach/4-3.c unresolved: got 22 (Invalid argument) on line 157 (Sem_post in signal handler 1)

Both of them have wrong steps of its test preparation:
  1. register signal handlers (just do sem_post()) for SIGUSR1/SIGUSR2.
  2. block those signals
  3. prepare something (sem_init()) for these signal handlers
  4. send signals to itself from sub-threads.

They have a window of not-yet-prepared-for-signals
between step 1 and 2. I think above "UNRESOLVED" failures
(sem_post() before sem_init()) are the result of getting a
signal during this window.
I don't know who sent a signal to them but I guess
neighboring tests are suspects, because number of tests run
concurrently in open_posix_testsuite.

The fix shall be just delaying step 1 to between step 2 and 4,
so I wrote such a patch for both pthread_setschedparam and
pthread_detach. I have confirmed that this UNRESOLVED failure
disappeared with this patch applied.

Signed-off-by: Seiichi Ikarashi <s.ikarashi@jp.fujitsu.com>

Regards,