From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Sean Whitton <spwhitton@spwhitton.name>
Cc: "xenodasein--- via Emacs development discussions."
<emacs-devel@gnu.org>,
eliz@gnu.org, xenodasein@tutanota.de
Subject: Re: Development Speed
Date: Fri, 24 Dec 2021 09:06:11 -0500 [thread overview]
Message-ID: <jwvo856je24.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87czlm3hyf.fsf@melete.silentflame.com> (Sean Whitton's message of "Thu, 23 Dec 2021 18:33:12 -0700")
>> According to any of the C standards, Emacs is just one large undefined
>> behavior.
> Would you mind expanding on this remark briefly? What sort of undefined
> behaviour do you have in mind?
Scanning the stack and playing with the lowest 3 bits of pointers come
to mind. These are UB, and in C as soon as one UB is encountered during
execution, everything else from now on is potentially UB (more
specifically, the C standard allows the interpretation that a UB
operation does literally anything, including never terminating and
behaving eerily like your program).
Stefan
next prev parent reply other threads:[~2021-12-24 14:06 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 0:52 Development Speed xenodasein--- via Emacs development discussions.
2021-12-22 1:16 ` Po Lu
2021-12-22 12:41 ` Eli Zaretskii
2021-12-22 15:15 ` xenodasein--- via Emacs development discussions.
2021-12-22 16:37 ` Eli Zaretskii
2021-12-23 13:36 ` xenodasein--- via Emacs development discussions.
2021-12-23 13:42 ` Po Lu
2021-12-23 13:48 ` xenodasein--- via Emacs development discussions.
2021-12-23 16:36 ` Stefan Monnier
2021-12-23 17:02 ` xenodasein--- via Emacs development discussions.
2021-12-24 0:21 ` Po Lu
2021-12-24 20:21 ` Tim Cross
2021-12-23 16:35 ` Stefan Monnier
2021-12-23 17:35 ` xenodasein--- via Emacs development discussions.
2021-12-23 19:12 ` Stefan Monnier
2021-12-23 19:53 ` xenodasein--- via Emacs development discussions.
2021-12-23 20:10 ` Stefan Monnier
2021-12-23 20:16 ` Eli Zaretskii
2021-12-23 22:07 ` xenodasein--- via Emacs development discussions.
2021-12-24 7:00 ` Eli Zaretskii
2021-12-25 5:16 ` Richard Stallman
2021-12-25 5:22 ` Po Lu
2021-12-25 7:03 ` Eli Zaretskii
2021-12-25 15:55 ` Stefan Monnier
2021-12-25 5:16 ` Richard Stallman
2021-12-24 1:33 ` Sean Whitton
2021-12-24 14:06 ` Stefan Monnier [this message]
2021-12-24 14:39 ` Óscar Fuentes
2021-12-22 15:21 ` xenodasein--- via Emacs development discussions.
2021-12-22 16:42 ` Eli Zaretskii
2021-12-23 13:57 ` xenodasein--- via Emacs development discussions.
2021-12-23 14:37 ` Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2021-12-21 10:52 xenodasein--- via Emacs development discussions.
2021-12-21 11:05 ` Po Lu
2021-12-21 11:25 ` xenodasein--- via Emacs development discussions.
2021-12-21 11:37 ` Po Lu
2021-12-21 14:47 ` xenodasein--- via Emacs development discussions.
2021-12-22 0:56 ` Po Lu
2021-12-22 1:05 ` xenodasein--- via Emacs development discussions.
2021-12-21 12:05 ` Stefan Kangas
2021-12-21 12:20 ` Theodor Thornhill
2021-12-21 14:14 ` xenodasein--- via Emacs development discussions.
2021-12-21 14:48 ` Eli Zaretskii
2021-12-22 4:16 ` Richard Stallman
2021-12-22 10:09 ` Óscar Fuentes
2021-12-22 10:22 ` Po Lu
2021-12-22 10:38 ` Óscar Fuentes
2021-12-22 10:45 ` Po Lu
2021-12-22 13:47 ` Eli Zaretskii
2021-12-23 3:43 ` Richard Stallman
2021-12-23 9:50 ` Óscar Fuentes
2021-12-23 10:37 ` Po Lu
2021-12-23 10:52 ` Óscar Fuentes
2021-12-23 10:54 ` Arthur Miller
2021-12-24 4:13 ` Richard Stallman
2021-12-24 4:13 ` Richard Stallman
2021-12-22 14:21 ` Dmitry Gutov
2021-12-23 1:00 ` Po Lu
2021-12-23 1:05 ` Dmitry Gutov
2021-12-23 1:07 ` Po Lu
2021-12-23 2:18 ` dick
2021-12-23 6:39 ` Eli Zaretskii
2021-12-23 10:46 ` Dmitry Gutov
2021-12-23 12:54 ` Arthur Miller
2021-12-22 13:41 ` Eli Zaretskii
2021-12-22 15:51 ` Óscar Fuentes
2021-12-22 17:12 ` Eli Zaretskii
2021-12-22 18:49 ` Óscar Fuentes
2021-12-23 3:43 ` Richard Stallman
2021-12-23 10:13 ` Óscar Fuentes
2021-12-23 10:35 ` Po Lu
2021-12-23 10:47 ` Óscar Fuentes
2021-12-23 10:50 ` Po Lu
2021-12-23 10:59 ` Óscar Fuentes
2021-12-23 11:05 ` Po Lu
2021-12-23 11:16 ` Óscar Fuentes
2021-12-24 4:13 ` Richard Stallman
2021-12-24 4:13 ` Richard Stallman
2021-12-23 10:23 ` Arthur Miller
2021-12-24 4:13 ` Richard Stallman
2021-12-22 14:41 ` xenodasein--- via Emacs development discussions.
2021-12-19 17:06 xenodasein--- via Emacs development discussions.
2021-12-20 0:31 ` Po Lu
2021-12-20 4:16 ` xenodasein--- via Emacs development discussions.
2021-12-20 5:12 ` Po Lu
2021-12-20 8:16 ` Philip Kaludercic
2021-12-20 14:30 ` Stefan Monnier
2021-12-20 15:51 ` xenodasein--- via Emacs development discussions.
[not found] ` <MrLr14W--3-2@tutanota.de>
[not found] ` <87lf0f1vko.fsf@yahoo.com>
2021-12-20 15:49 ` xenodasein--- via Emacs development discussions.
2021-12-21 1:06 ` Po Lu
2021-12-21 10:25 ` xenodasein--- via Emacs development discussions.
2021-12-21 10:31 ` Po Lu
2021-12-21 14:39 ` Eli Zaretskii
2021-12-20 10:31 ` Lars Ingebrigtsen
2021-12-21 4:15 ` Richard Stallman
2021-12-21 5:55 ` Eli Zaretskii
2021-12-21 11:09 ` xenodasein--- via Emacs development discussions.
2021-12-21 14:52 ` Eli Zaretskii
2021-12-22 0:55 ` xenodasein--- via Emacs development discussions.
2021-12-22 12:44 ` Eli Zaretskii
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: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwvo856je24.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=spwhitton@spwhitton.name \
--cc=xenodasein@tutanota.de \
/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://git.savannah.gnu.org/cgit/emacs.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).