From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: Guillaume Chazarain <guichaz@yahoo.fr>,
Zsh Hackers' List <zsh-workers@sunsite.dk>
Subject: Re: deadlock caused by gettext usage in a signal handler
Date: Tue, 4 Dec 2007 19:43:09 +0000 [thread overview]
Message-ID: <20071204194309.7ca3e250.p.w.stephenson@ntlworld.com> (raw)
In-Reply-To: <20071204194314.136c08ad@inria.fr>
On Tue, 4 Dec 2007 19:43:14 +0100
Guillaume Chazarain <guichaz@yahoo.fr> wrote:
> > > strerror_r also calls into gettext, so I don't see how this solves the
> > > problem.
> >
> > strerror_r() is the way of ensuring thread safety in printing the
> > message by providing a buffer into which data is written. The GNU
> > library manual entry does actually claim it's thread-safe; that
> > means that any hidden back-end functions it uses are thread-safe too.
>
> Thread-safety does not imply async-signal-safety. It means locks and
> thread local storage, but these do nothing for signals. It would be
> great if sticking an _r would make functions callable in signal
> handlers ;-)
Indeed, it's as you say. So the patch doesn't really help, since that's
the only case we have to worry about. I don't see an easy way out at
the moment.
--
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/
next prev parent reply other threads:[~2007-12-04 23:43 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-30 19:35 Guillaume Chazarain
2007-12-03 22:43 ` Peter Stephenson
2007-12-04 1:39 ` Paul Ackersviller
2007-12-04 18:02 ` Guillaume Chazarain
2007-12-04 18:24 ` Peter Stephenson
2007-12-04 18:43 ` Guillaume Chazarain
2007-12-04 19:43 ` Peter Stephenson [this message]
2007-12-04 19:49 ` Guillaume Chazarain
2007-12-04 20:30 ` Peter Stephenson
2007-12-04 23:09 ` Guillaume Chazarain
2007-12-06 23:02 ` Guillaume Chazarain
2007-12-07 10:35 ` Peter Stephenson
2007-12-07 10:46 ` Guillaume Chazarain
2007-12-07 11:21 ` Bart Schaefer
2007-12-07 11:27 ` Peter Stephenson
2007-12-07 11:57 ` Guillaume Chazarain
2007-12-07 11:29 ` Peter Stephenson
2007-12-10 0:11 Paul Ackersviller
2007-12-10 2:04 ` Bart Schaefer
2007-12-10 3:17 ` Paul Ackersviller
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=20071204194309.7ca3e250.p.w.stephenson@ntlworld.com \
--to=p.w.stephenson@ntlworld.com \
--cc=guichaz@yahoo.fr \
--cc=zsh-workers@sunsite.dk \
/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/zsh/
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).