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Re: Backport important ASan features from upstream.

From: Yury Gribov <y dot gribov at samsung dot com>
To: Andrew Pinski <pinskia at gmail dot com>, Maxim Ostapenko <m dot ostapenko at partner dot samsung dot com>
Cc: Vyacheslav Barinov <v dot barinov at samsung dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Jakub Jelinek <jakub at redhat dot com>, Slava Garbuzov <v dot garbuzov at samsung dot com>, Richard Biener <rguenther at suse dot de>
Date: Thu, 19 Nov 2015 11:53:07 +0300
Subject: Re: Backport important ASan features from upstream.
Authentication-results: sourceware.org; auth=none
References: <564D860B dot 4070703 at partner dot samsung dot com> <CA+=Sn1noXOBX9zi4DXQpAoA-bGXO2rjyKJVUhUCzydz=+fP=pw at mail dot gmail dot com>

On 11/19/2015 11:36 AM, Andrew Pinski wrote:

On Nov 19, 2015 12:19 AM, "Maxim Ostapenko" <m.ostapenko@partner.samsung.com>
wrote:


Hi!

Since the last sanitizer library merge to GCC happened, some new useful

features were applied upstream. In particular, the most significant are:


* The shadow offset for ASan was unified on Aarch64 for 39 and 42 VMAs (

http://reviews.llvm.org/D13782). AFAU, this change wouldn't require any
additional support from compiler side, because the shadow offset is the
same as for 39-bit VMA (36).

Actually until 48 vma is implemented asan is useless for aarch64 and should
not be enabled at all.

Linaro has stated several times that main reason for missing 48-bitsupport is lack of HW. Could Cavium provide them with ThunderX bot?


Best regards,
Yury Gribov

References:
- Backport important ASan features from upstream.
  - From: Maxim Ostapenko

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