Re: Evaluating an expression in a given scope

Daniel Jacobowitz
2005-09-07T13:53:24Z

On Wed, Sep 07, 2005 at 05:45:20PM +0400, Vladimir Prus wrote:
> Daniel Jacobowitz wrote:
>
> > On Wed, Sep 07, 2005 at 04:39:52PM +0400, Vladimir Prus wrote:
> >>
> >> Hello!
> >>
> >> Does gdb provides a clean way to evaluate an expression in a given scope
> >> (file:line)?
> >
> > No, not really. File:line doesn't match unambiguously to scope,
> > either, so it's not clear what the interface should look like... I
> > think I'd use $pc instead.
>
> You mean that variable can some into scope in the middle of assembler code
> for a source-language line? Say:
>
> int i = j, j = 10;
>
> ? Well, true! Though it's really a corner case

No. Think about inlining, template expansion, macro definitions with
line numbers (which gcc doesn't do today but could in the future). A
line is not an unambiguous reference to GDB's notion of a "scope".