Re: [LTP] [PATCH] fix UNRESOLVED failures of pthread tests in open_posix_testsuite

[Subrata Modak <subrata@linux.vnet.ibm.com>]

On Fri, 2009-09-04 at 10:35 +0900, Seiichi Ikarashi wrote: 
> 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>

Ok Thanks.

Regards--
Subrata

> 
> Regards,
> 
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