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From: Dmitry Vyukov <dvyukov@google.com>
Date: Mon, 29 Sep 2014 18:22:46 +0400
Message-ID: <CACT4Y+ZGXV_+J7sR-6_HX5eAOWQAXw5gSvjh1rw_mCxt90iNtQ@mail.gmail.com>
Subject: Re: [PATCH v3 00/13] Kernel address sanitizer - runtime memory debugger.
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To: Yuri Gribov <tetra2005@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>, Sasha Levin <sasha.levin@oracle.com>, Andrey Ryabinin <a.ryabinin@samsung.com>, LKML <linux-kernel@vger.kernel.org>, Konstantin Serebryany <kcc@google.com>, Dmitry Chernenkov <dmitryc@google.com>, Andrey Konovalov <adech.fo@gmail.com>, Konstantin Khlebnikov <koct9i@gmail.com>, Michal Marek <mmarek@suse.cz>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Christoph Lameter <cl@linux.com>, Pekka Enberg <penberg@kernel.org>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, Dave Hansen <dave.hansen@intel.com>, Andi Kleen <andi@firstfloor.org>, Vegard Nossum <vegard.nossum@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>, linux-kbuild@vger.kernel.org, x86@kernel.org, "linux-mm@kvack.org" <linux-mm@kvack.org>, Randy Dunlap <rdunlap@infradead.org>, Peter Zijlstra <peterz@infradead.org>, Alexander Viro <viro@zeniv.linux.org.uk>, Dave Jones <davej@redhat.com>

On Fri, Sep 26, 2014 at 10:48 PM, Yuri Gribov <tetra2005@gmail.com> wrote:
> On Fri, Sep 26, 2014 at 9:29 PM, Dmitry Vyukov <dvyukov@google.com> wrote:
>> So in kernel we will need to support all API versions, and the
>> following looks like a much simpler way to identify current API
>> version:
>>> #if __GNUC__ == 5
>>> #define ASAN_V4
>
> What about having compiler(s) predefine some __SANITIZE_ADDRESS_ABI__
> macro for this? Hacking on __GNUC__ may not work given the zoo of GCC
> versions out there (FSF, Linaro, vendor toolchains, etc.)?

I don't have strong preference here... well, actually just not competent :)

But on the second though... what do we want to do with pre-build
modules? Can you envision that somebody distributes binary modules
built with asan?

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