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Date:      Sun, 5 Apr 2015 00:29:28 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Kevin Bowling <kevin.bowling@kev009.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Will ASAN MFC to 10-STABLE?
Message-ID:  <23C272F9-4BEA-40F2-B8A2-AC31961DE93C@FreeBSD.org>
In-Reply-To: <mfpo1m$k61$1@ger.gmane.org>
References:  <mfpl5m$1pc$1@ger.gmane.org> <486B7716-6548-40D1-9ECE-1A7D997EFFC0@FreeBSD.org> <mfpo1m$k61$1@ger.gmane.org>

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On 05 Apr 2015, at 00:19, Kevin Bowling <kevin.bowling@kev009.com> =
wrote:
>=20
> On 4/4/2015 3:11 PM, Dimitry Andric wrote:
>> On 04 Apr 2015, at 23:30, Kevin Bowling <kevin.bowling@kev009.com> =
wrote:
>>>=20
>>> I believe the last bits needed to try clang's ASAN feature is the =
clang-rt stuff.  Will this MFC with a clang 3.5 or 3.6 MFC?
>>=20
>> It depends on whether we will ever MFC the most recent version of =
clang
>> to stable/10.  Since clang 3.5.0 and later require C++11 support, =
doing
>> this will make it more difficult to upgrade from 9.x to 10.x, and not
>> everybody agrees that it is worth the trouble.
>>=20
>> Once 9.x is EOL (expected at the end 2016), it might cease to be an
>> issue, though. :-)
>>=20
>> -Dimitry
>=20
> Do you know if the clang-rt stuff will function with clang 3.4 or were =
there changes in the compiler to accommodate FreeBSD?

The sanitizer libraries are part of compiler-rt, and the version which
is compatible with clang 3.4 does not yet have full FreeBSD support.  I
don't think it is feasible to backport newer versions of these to
accommodate an older clang version.


> Wondering if we could try and add just the clang-rt libraries since =
the end of 2016 is a long time away :)

No, that is not easily done.

-Dimitry


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