From: Qing Zhao <qing.zhao@oracle.com>
To: Kees Cook <keescook@chromium.org>
Cc: Richard Biener <rguenther@suse.de>,
"joseph@codesourcery.com" <joseph@codesourcery.com>,
gcc Patches <gcc-patches@gcc.gnu.org>,
"siddhesh@gcc.gnu.org" <siddhesh@gcc.gnu.org>
Subject: Re: [PATCH 2/2] Add a new warning option -Wstrict-flex-arrays.
Date: Mon, 21 Nov 2022 15:02:37 +0000 [thread overview]
Message-ID: <2AA33592-14D4-4E89-91F1-221F635117F1@oracle.com> (raw)
In-Reply-To: <202211180829.4F995ED2@keescook>
> On Nov 18, 2022, at 11:31 AM, Kees Cook <keescook@chromium.org> wrote:
>
> On Fri, Nov 18, 2022 at 03:19:07PM +0000, Qing Zhao wrote:
>> Hi, Richard,
>>
>> Honestly, it’s very hard for me to decide what’s the best way to handle the interaction
>> between -fstrict-flex-array=M and -Warray-bounds=N.
>>
>> Ideally, -fstrict-flex-array=M should completely control the behavior of -Warray-bounds.
>> If possible, I prefer this solution.
>>
>> However, -Warray-bounds is included in -Wall, and has been used extensively for a long time.
>> It’s not safe to change its default behavior.
>
> I prefer that -fstrict-flex-arrays controls -Warray-bounds. That
> it is in -Wall is _good_ for this reason. :) No one is going to add
> -fstrict-flex-arrays (at any level) without understanding what it does
> and wanting those effects on -Warray-bounds.
The major difficulties to let -fstrict-flex-arrays controlling -Warray-bounds was discussed in the following threads:
https://gcc.gnu.org/pipermail/gcc-patches/2022-October/604133.html
Please take a look at the discussion and let me know your opinion.
Thanks,
Qing
>
> --
> Kees Cook
next prev parent reply other threads:[~2022-11-21 15:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-08 14:51 [PATCH 0/2] Add a new warning option -Wstrict-flex-array Qing Zhao
2022-11-08 14:51 ` [PATCH 1/2] Change the name of array_at_struct_end_p to array_ref_flexible_size_p Qing Zhao
2022-11-09 7:57 ` Richard Biener
2022-11-09 15:50 ` Qing Zhao
2022-11-08 14:51 ` [PATCH 2/2] Add a new warning option -Wstrict-flex-arrays Qing Zhao
2022-11-15 15:41 ` Qing Zhao
2022-11-18 13:14 ` Richard Biener
2022-11-18 15:19 ` Qing Zhao
2022-11-18 16:31 ` Kees Cook
2022-11-21 15:02 ` Qing Zhao [this message]
2022-11-22 8:16 ` Richard Biener
2022-11-22 14:10 ` Qing Zhao
2022-11-22 15:02 ` Qing Zhao
2022-11-22 17:17 ` Kees Cook
2022-11-24 6:45 ` Richard Biener
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