Re: [unwind-20030108-branch] Add sentinel-frame + misc

[Daniel Jacobowitz <drow@mvista.com>]

On Fri, Jan 10, 2003 at 01:45:55AM -0500, Andrew Cagney wrote:
> with patch,
> 
> >This adds sentinal-frame.[hc] and then modifies the unwind code in frame.c 
> >so that it can exploit the fact that there is alway an extra frame beyond 
> >the inner most frame.  This has a dramatic effect on the unwind code - so 
> >much simpler!
> >
> >It doesn't do things like ensure that there is always a frame or create 
> >the inner most frame from the sentinel frame.
> >
> >To confuse the patch slightly, it also adjusts the id_unwind, pc_unwind 
> >and register_unwind function types.
> >
> >Andrew

Yeah!

I've just got one stylistic comment:

> -struct dummy_frame
> +struct frame_unwind_cache
>  {
> -  struct dummy_frame *next;
> +  struct frame_unwind_cache *next;


> @@ -555,8 +522,14 @@
>     If the value isn't here AND a value is needed, try the next inner
>     most frame.  */
>  
> +struct frame_unwind_cache
> +{
> +  void *regs[1];
> +};
> +

I know it makes some type-checking simpler, but naming all your private types
the same thing is a real nuisance when using this lame "GDB" thing on
the code afterwards.  Must we?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer