Single stepping and threads

[Michael Snyder]

On Thu, 2006-11-30 at 15:55 -0800, Joel Brobecker wrote:
> > Default on would be a disaster -- most threaded programs would
> > not behave even remotely the same under the debugger as they would
> > solo.
> > 
> > In fact, many would deadlock almost immediately.
> 
> Something just occured to me that was clear but maybe isn't. Is the
> scheduling affected when you do a "continue"? I assumed that, if you
> do a "run" or "continue", the actual scheduling policy is irrelevant,
> and all threads are resumed.

"Schedlock step" does not affect the continue behavior, 
but "schedlock on" does.  With "on", no other thread can
execute, period.