[patch] Add various constants to malloc_info output.

[Florian Weimer]

* DJ Delorie:

> It was easier to add this than do manually figure these out... ;-)
>
> I'm not an XML expert so if there's a better choice of schema for
> these, speak up.
>
> 	* malloc/malloc.c (__malloc_info): Add various constants to the
> 	output.
>
> diff --git a/malloc/malloc.c b/malloc/malloc.c
> index b8baaa2706..0ec0dcc8cf 100644
> --- a/malloc/malloc.c
> +++ b/malloc/malloc.c
> @@ -5387,6 +5387,16 @@ __malloc_info (int options, FILE *fp)
>  
>    fputs ("<malloc version=\"1\">\n", fp);
>  
> +  fprintf (fp, "<malloc_alignment bytes=\"%ld\" />\n", (long) MALLOC_ALIGNMENT);
> +  fprintf (fp, "<min_chunk_size bytes=\"%ld\" />\n", (long) MIN_CHUNK_SIZE);
> +  fprintf (fp, "<max_fast_alloc bytes=\"%ld\" />\n", (long) MAX_FAST_SIZE);

> +  fprintf (fp, "<max_tcache_alloc bytes=\"%ld\" />\n", (long) MAX_TCACHE_SIZE);

I think this needs to be conditional on USE_TCACHE.

By the way, do you know if MALLOC_ALIGNMENT is visible in debugging
information somewhere (without -g3)?