kernel module code coverage

[Alan Somers]

On Thu, Aug 8, 2019 at 7:42 AM Michael Tuexen <tuexen at freebsd.org> wrote:
>
>
>
> > On 8. Aug 2019, at 14:24, Slava Shwartsman <slavash at FreeBSD.org> wrote:
> >
> > Apparently, Bullseye are dropping support for FreeBSD.
> >
> > We are looking for an alternative for kernel module run time analysis.
> > Mostly interested in code coverage (for now).
> >
> > Any suggestions that work for you?
> Have you looked into /dev/kcov. This is used by SYZKALLER for getting
> coverage information from the kernel.
>
> Best regards
> Michael
> >
> >
> > Slava

That's part of Matt Macy's gcov project, right?.  However, while it
works for the kernel itself, it doesn't work for modules.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239194
-Alan