kernel module code coverage

[Slava Shwartsman]

On 08-Aug-19 16:52, Alan Somers wrote:
> 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.
>>

Thanks.
Is there a man page for /dev/kcov?

>> 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.

In worst case, I can build my module into the kernel, right?

> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239194
> -Alan
> 


Slava