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From: "qinzhao at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/108894] -fsanitize=bounds missing bounds provided by
 __builtin_dynamic_object_size()
Date: Thu, 23 Feb 2023 21:10:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108894

--- Comment #9 from qinzhao at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #8)
> Well, -fsanitize=3Dbounds-strict certainly shouldn't imply
> -fstrict-flex-arrays=3D2,
> it should just treat [1] and [4] (but I think it does even [0] right now)=
 as
> regular arrays for the purposes of the sanitization.

with a small example I just tested, with -fsanitize=3Dbounds-strict, I can =
see,
it treats:
   [], [0] as flexible array members;
but
   [1], [4] as regular arrays

This is the same level as -fstrict-flex-arrays=3D2.=20
should we just keep its default behavior like this, or let it more strictly=
 as
-fstrict-flex-arrays=3D3?=