Re: Test-lock hang (not 100% reproducible) on GNU/Linux

[Pavel Raiskup]

On Thursday, January 5, 2017 7:51:00 PM CET Bruno Haible wrote:
> Pavel Raiskup wrote:
> > Thanks.  Minor report is that gl_thread_join() is not handled properly for
> > joined thread statuses.
> > 
> > This leads to situation that Koji build system tries to gently terminate
> > the build first (after two days) ... which (sometimes?) leads to successful
> > 'test-lock' run in the end and the build succeeds too a bit later.
> 
> I cannot explain why this happens and how to fix it. If pthread_join would
> report an error code, glthread_join would as well, and gl_thread_join would
> abort the process, and 'make check' would fail:
> 
> # define glthread_join(THREAD, RETVALP) \
>     (pthread_in_use () ? pthread_join (THREAD, RETVALP) : 0)
> 
> #define gl_thread_join(THREAD, RETVAL)     \
>    do                                      \
>      {                                     \
>        if (glthread_join (THREAD, RETVAL)) \
>          abort ();                         \
>      }                                     \
>    while (0)

It looks like RETVALP shouldn't be NULL.  Dunno whether the success is
matter of luck or whether it is guaranteed thing.

Pavel