From: Jeff King <peff@peff.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, Stefan Beller <sbeller@google.com>
Subject: Re: [PATCH 1/2] introduce "banned function" list
Date: Fri, 20 Jul 2018 13:45:24 -0400 [thread overview]
Message-ID: <20180720174524.GB22486@sigill.intra.peff.net> (raw)
In-Reply-To: <xmqqa7qmckwi.fsf@gitster-ct.c.googlers.com>
On Fri, Jul 20, 2018 at 02:32:29AM -0700, Junio C Hamano wrote:
> > Contrast this with memcpy(). This is on Microsoft's SDL banned list[1],
> > but I think it's silly for it to be. I would never add it to this list.
>
> A tangent, but is that because they want you to use memmove()
> instead so that you do not have to worry about overlapping copies,
> perhaps?
That was my first thought, too, but nope. They recommend memcpy_s()
instead. Which in my opinion adds very little value, while missing the
most common misuse of memcpy I've seen in practice (the overlapping
thing).
Helpers like our COPY_ARRAY() are much more useful for preventing sizing
mistakes, IMHO. But again, I'd never ban memcpy. The right tool for
encouraging COPY_ARRAY() is coccinelle (because the matching is
complicated, but also because we can mechanically turn it into the right
thing, whereas a strcpy is going to require some manual reworking).
-Peff
next prev parent reply other threads:[~2018-07-20 17:45 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-19 20:33 [PATCH 0/2] fail compilation with strcpy Jeff King
2018-07-19 20:39 ` [PATCH 1/2] introduce "banned function" list Jeff King
2018-07-19 21:11 ` Eric Sunshine
2018-07-19 21:27 ` Jeff King
2018-07-19 21:59 ` Eric Sunshine
2018-07-20 0:55 ` Jeff King
2018-07-19 21:15 ` Stefan Beller
2018-07-19 21:32 ` Jeff King
2018-07-19 21:47 ` Stefan Beller
2018-07-20 0:54 ` Jeff King
2018-07-19 22:46 ` Junio C Hamano
2018-07-19 23:55 ` Randall S. Becker
2018-07-20 1:08 ` Jeff King
2018-07-20 1:12 ` Jeff King
2018-07-20 9:32 ` Junio C Hamano
2018-07-20 17:45 ` Jeff King [this message]
2018-07-20 13:22 ` Theodore Y. Ts'o
2018-07-20 17:56 ` Jeff King
2018-07-20 19:03 ` Junio C Hamano
2018-07-20 12:42 ` Derrick Stolee
2018-07-20 14:41 ` Duy Nguyen
2018-07-20 17:48 ` Elijah Newren
2018-07-20 18:04 ` Jeff King
2018-07-20 18:00 ` Jeff King
2018-07-19 20:39 ` [PATCH 2/2] banned.h: mark strncpy as banned Jeff King
2018-07-19 21:12 ` Ævar Arnfjörð Bjarmason
2018-07-19 21:33 ` Jeff King
2018-07-20 18:58 ` [PATCH 0/2] fail compilation with strcpy Junio C Hamano
2018-07-20 19:18 ` Jeff King
2018-07-20 21:50 ` Junio C Hamano
2018-07-24 9:23 ` [PATCH v2 0/4] " Jeff King
2018-07-24 9:26 ` [PATCH v2 1/4] automatically ban strcpy() Jeff King
2018-07-24 17:20 ` Eric Sunshine
2018-07-26 6:58 ` Jeff King
2018-07-26 7:21 ` [PATCH v3 " Jeff King
2018-07-26 17:33 ` Junio C Hamano
2018-07-27 8:08 ` Jeff King
2018-07-27 17:34 ` Junio C Hamano
2018-07-28 9:24 ` Jeff King
2018-07-24 9:26 ` [PATCH v2 2/4] banned.h: mark strcat() as banned Jeff King
2018-07-24 9:27 ` [PATCH v2 3/4] banned.h: mark sprintf() " Jeff King
2018-07-24 9:28 ` [PATCH v2 4/4] banned.h: mark strncpy() " Jeff King
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180720174524.GB22486@sigill.intra.peff.net \
--to=peff@peff.net \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
--cc=sbeller@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).