[NEWBIE] How to exit from a loop

[NEWBIE] How to exit from a loop

[Stefano Sabatini]

Hi all,

suppose I'm debugging some code like this:

int i;
for (i=0; i < a_big_number; i++)
    do_something(i);

out_of_the_loop:
    do_something_else();

and I'd like to jump out of the loop.

What I did everytime is to simply put a breakpoint just after
out_of_the_loop and hit continue, then I need to unset the breakpoint.

I wonder if there is a more efficient way to exit from the loop,
without the need to set a breakpoint at the rigth place, continue and
then unset the breakpoint but with just a single command/macro.

Many thanks in advance, regards.

Re: [NEWBIE] How to exit from a loop

[Andreas Schwab]

Stefano Sabatini <stefano.sabatini-lala@poste.it> writes:

> I wonder if there is a more efficient way to exit from the loop,
> without the need to set a breakpoint at the rigth place, continue and
> then unset the breakpoint but with just a single command/macro.

(gdb) help until
Execute until the program reaches a source line greater than the current
or a specified location (same args as break command) within the current frame.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: [NEWBIE] How to exit from a loop

[Daniel Jacobowitz]

On Mon, Jun 30, 2008 at 05:33:11PM +0200, Stefano Sabatini wrote:
> I wonder if there is a more efficient way to exit from the loop,
> without the need to set a breakpoint at the rigth place, continue and
> then unset the breakpoint but with just a single command/macro.

Sure - take a look at the "advance" and "until" commands.

-- 
Daniel Jacobowitz
CodeSourcery