Re: memory address ranges (-var-create)

Daniel Jacobowitz
2006-12-10T20:53:25Z

On Mon, Dec 11, 2006 at 09:40:32AM +1300, Nick Roberts wrote:
> For
>
> -var-create - * EXPRESSION
>
> the manual says EXPRESSION may be:
>
> * `*ADDR-ADDR' -- a memory address range (TBD)

Weird. That doesn't seem like a good idea, as you found.

> I would like to detect when a string value changes which presumably means
> watching a memory address range. Currently a variable object for a string
> will only detect that the address has changed or the first character
> (the child).
>
> I see that watch expressions do the right thing in Insight, from which the
> variable object code has apparently been taken. Can this code be adapted
> for -var-create?

Would it work for your front end to create a varobj for "(char[7] *)
str" where it computes the length itself?

(gdb) p *(char[7] *) rl_prompt
$13 = "(gdb) "

If that's what you want, we might be able to come up with a smarter way
to handle the special string case, or do it automatically.

--
Daniel Jacobowitz
CodeSourcery