[PATCH:xserver] Use pthread_setname_np to set thread names if available

[Jeremy Sequoia]

Sent from my iPhone...

> On Oct 17, 2016, at 18:48, Alan Coopersmith <alan.coopersmith at oracle.com> wrote:
> 
>> On 10/17/16 06:36 PM, Peter Hutterer wrote:
>>> On Sat, Sep 10, 2016 at 09:14:19PM -0700, Alan Coopersmith wrote:
>>> I have only tested this on Solaris, not MacOS or Linux, but since the
>>> similar code in glib works on both, hope this will too.
>> 
>> 
>> this broke a few scripts here, e.g. ps -C Xorg won't work anymore because
>> the program name is now MainThread. I understand why we'd want to label the
>> input thread but do we get any benefit out of labelling the main thread?
> 
> Oh, I didn't know it would do that on Linux - Solaris still shows the process
> name for the process, and the thread names only when looking at the threads.

On macOS, this also just changes the name of the thread, not the process.

IMO, it seems wrong that it would have such an effect on Linux.

> I just figured it was handy when libraries spawn their own threads, so we could
> tell the difference between our thread and theirs, but if it's causing problems,
> I don't think it's useful enough to force the issue and am okay seeing the main
> thread name dropped.
> 
> -- 
>    -Alan Coopersmith-              alan.coopersmith at oracle.com
>     Oracle Solaris Engineering - http://blogs.oracle.com/alanc