That's great!
> Hi,
> The problems caused by enabling both kcov and retguard was due to the
> increased kernel size. Now that NKL2_KIMG_ENTRIES has been bumped on
> amd64, it's no longer a problem.
>
> Comments? OK?
>
> Index: arch/amd64/conf/Makefile.amd64
> ===================================================================
> RCS file: /cvs/src/sys/arch/amd64/conf/Makefile.amd64,v
> retrieving revision 1.107
> diff -u -p -r1.107 Makefile.amd64
> --- arch/amd64/conf/Makefile.amd64 30 Dec 2018 23:08:05 -0000 1.107
> +++ arch/amd64/conf/Makefile.amd64 7 Jan 2019 19:25:07 -0000
> @@ -95,7 +95,6 @@ LINKFLAGS+= -S
> .endif
>
> .if ${SYSTEM_OBJ:Mkcov.o} && ${COMPILER_VERSION:Mclang}
> -CMACHFLAGS+= -fno-ret-protector
> PROF= -fsanitize-coverage=trace-pc
> .endif
>
