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Re: Getting pissed off by gdb. Please help with stepping in.
On Thursday 18 March 2010 15:39:23 Daniel Jacobowitz wrote:
> On Thu, Mar 18, 2010 at 03:33:05PM +0100, André Pönitz wrote:
> > I used the term from the comment
> >
> > "Optimize by setting the stepping range to the line."
>
> Oh, I see - that's the comment below, not the one quoted. OK.
>
> > For me it's in fact the opposite to an optimization as the single stepping
> > through the rest of the second line leads to one round trip through the
> > stub for each of the remaining instructions which easily sums up to a
> > couple of seconds for lines that generate a hundred instructions.
>
> Just what are you disabling then? I thought it was the if block you
> quoted, not the step range changes.
I am unconditionally executing
if (1) {
/* ... */
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stepped to a different line\n");
ecs->event_thread->stop_step = 1;
print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
This means the PC might indeed end up in the middle of a line, and a few
instruction of this line have already been executed. However in these
somewhat "special" circumstances this is a significantly lesser evil then
skipping a whole line (and taking several seconds for that ;-})
Andre'