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Re: -var-update using formatted value
On Sunday 20 January 2008 23:15:26 Nick Roberts wrote:
> > > > I cannot imagine any usecase where the frontend would:
> > > >
> > > > 1. Change format
> > > > 2. Step program
> > > > 3. Issue -var-update
> > >
> > > I'm not sure what point you're making here. Debugging GDB, has variables
> > > which contain addresses which are not pointers (so the natural format is
> > > decimal), e.g., stack_addr, code_addr components of frames. It makes
> > > sense here to:
> > >
> > > 1. Change format to hexadecimal
> > > 2. Step GDB
> > > 3. Issue -var-update to see if these values have changed.
> >
> > What UI-level command does this? And why, after you change format,
> > you don't read/display the value in new format?
>
> Creating a watch expression (in the speedbar, in the case of Emacs) for a frame
> related structure would do this. Yes, currently you would need to do
> -var-update after 1..
>
> Anyway, I withdraw my objection to your patch, if the patch (or similar) in the
> thread I mentioned (http://sourceware.org/ml/gdb-patches/2006-05/msg00008.html)
> is also approved. So there appears to be some consensus here.
FWIW, I agree that the patch in
http://sourceware.org/ml/gdb-patches/2006-05/msg00008.html
is good, as it removes the need to do -var-evaluate-expression
or -var-update after setting variable's format.
- Volodya