Re: [PATCH] New annotation for threads

[Joel Brobecker <brobecker at adacore dot com>]

>  > I'd really like to have others' opinions on this one.  I thought that
>  > we weren't going to change our annotations anymore. And even though
>  > we were not going to remove annotations for a while longer, we were
>  > going to focuse on MI instead.
> 
> It doesn't impede MI development, so you could think of it as orthogonal.
> Clearly it can eventually be removed with the rest of annotations.

OK, here is what I can propose: Send a patch for approval that implements
this new annotation using observers. I will review it, and then we will
let it sit for an extra week to give everyone time to object if they
disagree.

>  > > 2008-04-18  Nick Roberts  <nickrob@snap.net.nz>
>  > > 
>  > > 	* annotate.h: (annotate_new_thread): New extern.
>  > > 
>  > > 	* annotate.c (annotate_new_thread): New function.
>  > > 
>  > > 	* thread.c (add_thread_with_info): Use it.
>  > 
>  > How about creating a new observer for new_threads events instead of
>  > specifically calling an annotation function from "add_thread"? Seems
>  > much cleaner that way.
> 
> I'm not sure what you mean, or how I would register such an observer.
> All other annotations are done this way and, unlike MI, annotations don't
> have their own interpreter but just mark up CLI.

The observers are documented in doc/observer.texi. Basically, you need
to do the following:

    static void
    annotate_new_thread (struct thread_info *thread)
    {
      /* Your annotation here.  */
    }

And then attach this observer to the new_thread event using:

    observer_attach_new_thread (annotate_new_thread);

All this can be done inside annotate.c.

-- 
Joel