Watchpoints with condition

[Michael Snyder]

On Sat, 2007-12-01 at 12:10 +1100, Russell Shaw wrote:
> Vladimir Prus wrote:
> > GDB presently allow a watchpoint to have a condition, and I wonder
> > what are the use-cases for that.
> > 
> > If anybody has used watchpoint in condition in practice when debugging
> > real problem (as opposed to just playing with gdb, or making up
> > possible uses), can he share why it was needed?
> 
> I frequently need to enable or set a breakpoint only if another
> previous point in the program has been passed. How do i do that?


set $passed_milestone = 0
break milestone_func
commands
  silent
  set $passed_milestone = 1
end
break conditional_func if ($passed_milestone)