remote protocol extension for step out of range

[Andrew Cagney]

"J.T. Conklin" wrote:

> >From the protocol perspective, I don't think it would work any
> differently than stepping or continuing a given task.  Currently
> remote_resume() will send a "set thread" packet if the target's
> current thread is different than GDB's.  I didn't change this for
> the new packets, so the debug agent will be able to determine what
> thread the step range is for.

If I understand the existing code correctly, you can only do this
step-range thing for a single thread.  If something else happens then
that request is dropped on the floor.

For instance, GDB does a step out of range for thread T1.  While this is
happening, thread T2 hits a breakpoint so the target stops.  The user
then step out of range T2.  I suspect that GDB either:

	o	forgets that it is step out of ranging T1

	o	reverts to single stepping for T1

the protocol will certainly only allow GDB to step-out-of-range one
thread.

	Andrew