MI: "print /c whatever"

MI: "print /c whatever"

[Vladimir Prus]

Hi!
It seems like MI has no command that's equivalent to "print /c whatever",
that is, printing using character format.

The -data-evaluate-expression does not accept format specifier, and the
-var-set-format does not allow to specify character format (that's with CVS
code state).

So:
1. Can anybody suggest a workaround that works with gdb 6.3 and 6.4? 
2. What's the best fix -- adding format specifier to
-data-evaluate-expression (note that -data-list-changed-registers and
-data-read-memory *do* allow format specifier), or fixing -var-set-format?

Thanks,
Volodya

Re: MI: "print /c whatever"

[Daniel Jacobowitz]

On Mon, Jan 30, 2006 at 01:49:32PM +0300, Vladimir Prus wrote:
> 
> Hi!
> It seems like MI has no command that's equivalent to "print /c whatever",
> that is, printing using character format.
> 
> The -data-evaluate-expression does not accept format specifier, and the
> -var-set-format does not allow to specify character format (that's with CVS
> code state).
> 
> So:
> 1. Can anybody suggest a workaround that works with gdb 6.3 and 6.4? 
> 2. What's the best fix -- adding format specifier to
> -data-evaluate-expression (note that -data-list-changed-registers and
> -data-read-memory *do* allow format specifier), or fixing -var-set-format?

I don't know - but adding "character" to -var-set-format might be a
solution.  Or, you can do this using the existing code:

-var-create foo * "(char) 1"
^done,name="foo",numchild="0",type="char"
(gdb)
-var-evaluate-expression foo
^done,value="1 '\\001'"
(gdb) 

The character format is a bit ambiguous, as we've discussed before, I
think; I'm not sure what should be done with it.

-- 
Daniel Jacobowitz
CodeSourcery