Re: MI: type prefixes for values

[Daniel Jacobowitz <drow at false dot org>]

On Thu, Apr 06, 2006 at 06:31:24PM +0400, Vladimir Prus wrote:
> > > 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?

I don't know.  It's an interface.

Maybe it is an error for you to try to evaluate something after
-var-update says it has gone out of scope.

Maybe -var-evaluate-expression should report not in scope.

Someone with more MI experience would have to decide.

> 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?

I don't know.  Maybe Jim will comment.

-- 
Daniel Jacobowitz
CodeSourcery