Re: [Xen-devel] possible changes was Re: [PATCH] make domu_debug run-time option + fix int3 handling for MP

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

> > I don't think it's a domain builder issue.
> What do I do if I'm starting an OS specifically for debugging? Right 
> now I can
> do an int3 so that it will be paused. GDB isn't doing the forking and 
> gdbserver
> can't attach until the VM is running, so there is no equivalent to 
> putting a
> breakpoint on main(). I guess pausing the guest immediately after 
> creation could
> work.
Doesn't the gdb server have to attach to the new vm to be able to set 
the breakpoint, leading to a race anyway? Or have you some way to 
pre-insert an int3?
 -- Keir


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