linux-kernel - Re: [PATCH v3 2/3] Makefile: support flag -fsanitizer-coverage=trace-cmp

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Date:   Tue, 10 Oct 2017 18:51:46 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Alexander Potapenko <glider@...gle.com>, akpm@...ux-foundation.org,
        mark.rutland@....com, alex.popov@...ux.com,
        quentin.casasnovas@...cle.com, dvyukov@...gle.com,
        andreyknvl@...gle.com, keescook@...omium.org,
        vegard.nossum@...cle.com
Cc:     syzkaller@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] Makefile: support flag
 -fsanitizer-coverage=trace-cmp



On 10/10/2017 06:27 PM, Alexander Potapenko wrote:
> 
> v3: - Andrey Ryabinin's comments: reinstated scripts/Makefile.kcov
>       and moved CFLAGS_KCOV there, dropped CFLAGS_KCOV_COMPS

Huh? Try again.

> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 5e975fee0f5b..7ddd5932c832 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -142,6 +142,12 @@ _c_flags += $(if $(patsubst n%,, \
>  	$(CFLAGS_KCOV))
>  endif
>  
> +ifeq ($(CONFIG_KCOV_ENABLE_COMPARISONS),y)
> +_c_flags += $(if $(patsubst n%,, \
> +	$(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
> +	$(CFLAGS_KCOV_COMPS))
> +endif
> +
>  # If building the kernel in a separate objtree expand all occurrences
>  # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
>  
>