Re: instrumenting vs. module loading

[William Cohen <wcohen at redhat dot com>]

Ananth N Mavinakayanahalli wrote:
> Ananth N Mavinakayanahalli wrote:
>
> > Frank Ch. Eigler wrote:
> >
> > I don't have much idea about in kernel details of module loading and
> > unloading, but I'd imagine we'll encounter "interesting" issues if a
> > different module is loaded in the same text range with such a stray
> > kprobe.
>
>
> On more thought, we won't see any such issues - we won't have the 
> breakpoint hit at all - the whole text gets overlaid right?
>
> Doh! what was I thinking earlier.. need more coffee :-)
>
> Ananth

All is fine until the clean up code tries to unregister the kprobe and 
it scribbles over that location in memory which no longer has the 
breakpoint.

-will