Re: [PATCH] libthreads: mutex_lock holder debugging

[Samuel Thibault]

Sergio Lopez, le Thu 20 May 2010 00:37:48 +0200, a écrit :
> El Wed, 19 May 2010 16:27:07 +0200
> Samuel Thibault <samuel.thibault@gnu.org> escribió:
> 
> > Hello,
> > 
> > Sergio Lopez, le Fri 14 May 2010 12:35:41 +0200, a écrit :
> > > I've preferred to create a new definition conditional instead of
> > > using WAIT_DEBUG, since this one changes cproc_t structure size.
> > 
> > Mmm, I don't think it'd be a problem, since the cproc_t structure is
> > not exposed to users of libthreads.
> > 
> 
> Yes, you're right. Anyway, WAIT_DEBUG would imply a call to
> cthread_self for each mutex_lock(),

That's really far from costly, it's just a simple computation and a
dereference. libthreads may be used not only for translators, so I
believe it's still useful to record the holder thread.

Samuel