Re: MI: type prefixes for values

[Vladimir Prus <ghost@cs.msu.su>]

On Thursday 06 April 2006 18:01, Daniel Jacobowitz wrote:

> >     -exec-finish
> >     ^running
> >     (gdb)
> >    
> > *stopped,reason="function-finished",frame={addr="0x080483bd",func="main",
> > (gdb)
> >     -var-evaluate-expression TMP
> >     ^done,value="10"
> >     (gdb)
> >
> > There's no indication that 'TMP' varobj belongs to the stack frame we've
> > already left. This is with vanilla 6.4.
>
> Interesting, the check isn't on this path.  I wonder if we really need
> both different ways to get at the value of a variable.  varobj_update
> uses value_of_root, but -var-evaluate-expression uses
> value_of_variable.  I bet we have some redundant code here.  Maybe not,
> value_of_variable is only used for strings, the others work on struct
> value.

I don't quite understand if you're saying that the current behaviour is a bug, 
or not. Can you clarify?

> Anyway:
>
> -var-update *
> ^done,changelist=[{name="TMP",in_scope="false"}]
>
> There's your out of scope marker.

Yes, this is indeed what I'm after. However, now there's reverse problem. Say 
I create variable object for variable 'i'. Then during stepping I enter 
function that also has variable 'i'. I need to detect, somehow, that 'i' 
varobj created earlier relates to the parent stack frame, not the current, 
and that I have to create new variable object.

How do I do that? Using -var-update does not seem to produce this information? 
Am I supposed to manually keep track of frame-id where variable object was 
created? And if so, how do I get frame-id?

- Volodya