From: Markus Wichmann <nullplan@gmx.net>
To: musl@lists.openwall.com
Subject: Re: [musl] Difference in pthread behavior between glibc and musl
Date: Tue, 11 Jul 2023 21:42:54 +0200 [thread overview]
Message-ID: <ZK2wvkyAU5WR6QKa@voyager> (raw)
In-Reply-To: <D05988EE-5C2C-4893-ABA8-F35570CD83C7@amazon.com>
Am Tue, Jul 11, 2023 at 07:19:50PM +0000 schrieb Appelmans, Madeleine:
> Hello,
>
> There seems to be a difference in pthread behavior when compiling with
> glibc and using the musl-gcc wrapper. The attached snippet of code
> creates a destructor attribute which deletes a pthread key. The code
> never actually creates the pthread key. This code segfaults when
> compiled using musl-gcc, and does not segfault when compiled with gcc.
>
Undefined behavior is undefined. And it is undefined behavior to be
calling pthread_key_delete() with a key that was not previously acquired
from pthread_key_create(). POSIX encourages - but does not require -
implementations to detect invalid keys and return an error then. And
musl doesn't.
Ciao,
Markus
next prev parent reply other threads:[~2023-07-11 19:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-11 19:19 Appelmans, Madeleine
2023-07-11 19:42 ` Markus Wichmann [this message]
2023-07-12 2:48 ` Rich Felker
2023-07-13 1:00 ` Gabriel Ravier
2023-07-13 1:50 ` Rich Felker
2023-07-13 2:02 ` Gabriel Ravier
2023-07-13 16:27 ` Markus Wichmann
2023-07-13 18:49 ` Gabriel Ravier
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
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZK2wvkyAU5WR6QKa@voyager \
--to=nullplan@gmx.net \
--cc=musl@lists.openwall.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://git.vuxu.org/mirror/musl/
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 NNTP newsgroup(s).