Re: gdb printing of dynamically allocated matrix

[Peter Toft <pto at linuxbog dot dk>]

On Wed, 18 Jul 2007, Daniel Jacobowitz wrote:

> On Wed, Jul 18, 2007 at 01:22:33PM +0200, Peter Toft wrote:
> > * However how can I use GDB to see the contents of "b"
> >  similar to the contents of "c" and "a"?
> >  The best I can do is
> >  (gdb) print *b[0] @3
> >  (gdb) print *b[1] @3
> >  Obviously I would like to do the display in one command rather
> >  than several, especially if I changed the b-matrix to be b[7][8]
> 
> I don't believe this is possible without writing a user-defined
> command for it - see the manual.

Something like

define matprint 
  set $i = 0
  while $i< $arg1
    echo $arg0[$i++][0] @ $arg2
  end
end

so I then can do 
(gdb) matprint c 2 3

close but I quess it can be made better[1] 


> 
> >  How come that the next vector contains wrong values?
> 
> It's printing six consecutive elements from memory.

Yeah - seems to be the case

Thanx Daniel

Best regards

Peter

[1] after GDB-101 manual crash reading :)

-- 
Peter Toft, Ph.D. [pto@linuxbog.dk] http://petertoft.dk
Følg min Linux-blog på http://www.version2.dk/blogs/petertoft