As far as I can tell -- I haven't tested it -- Debugger() only
breaks if the USERBREAK environment variable is set to 1. In that
case it sends a SIGINT to the current thread. That's not quite
the same as a SIGTRAP.
Is there some condition whereby using another mechanism would be
better, for example running directly from gdb instead of the IDE? I
ask only because I've never had a reason to not use Debugger().
I think -- though the debugger folks might correct me on this -- that
trap/int3 is what gdb itself uses for breakpoints, so in theory it
might be "better" somehow. But as long as you're debugging a program
that doesn't have its own SIGINT handler, I think they'll have the
same effect.
-Eric
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