Re: [rfc] Annotation level THREE

[Andrew Cagney <ac131313@redhat.com>]

>  > 
>  > Why do you need display-{begin,end}?  -display-insert has been made 
>  > redundant by the varobj stuff - it lets the GUI efficiently track its 
>  > display values outside of the CLI.  
> 
> Variable objects don't auto-display. You seem to have to type
> -var-evaluate-expression each time the program stops. 

Why do you need auto-display?  What are you using it for?

Remember, every time the target changes (e.g., from a user modifying a 
variable or register), the display needs to be updated.  This is because 
that variable/register has the potential to modify every single value 
being displayed.  Further, unless your using some sort of changes-only 
mechanism, such as provided by the varobj, the display windows are just 
not going to scale.

>  >  The testsuite is a good source of 
>  > varobj examples (unfortunatly lacking from the doco):
>  > http://sources.redhat.com/gdb/current/onlinedocs/gdb_25.html#SEC565
> 
> The lack of documentation for (and apparent completeness of) GDB/MI is part of
> the problem.

Um, the varobj is documented.  It just lacks a vew concrete examples. 
Those can be found by examining the testsuite.  Both Apple and Eclipse 
are using this part of the MI.

>  > The above list also contains thing like field-{begin,end}, 
>  > array-section-{begin,end} et.al.  Why are they needed.
> 
> I use them to parse the output. They could probably go, if necessary, but
> others that you plan to take out *are* needed.

Can you please be more specific?

Andrew