From: Paul Eggert <eggert@cs.ucla.edu>
To: Pip Cet <pipcet@gmail.com>
Cc: andrewjmoreton@gmail.com, 32463@debbugs.gnu.org
Subject: bug#32463: 27.0.50; (logior -1) => 4611686018427387903
Date: Sun, 19 Aug 2018 03:59:21 -0700 [thread overview]
Message-ID: <c81bb6fc-edff-3f06-e4ba-9fd18465a585@cs.ucla.edu> (raw)
In-Reply-To: <CAOqdjBd0JdtjPnK2Z=gfd_zD3SiYktwBuVcBPR322zy5NZkPWw@mail.gmail.com>
Pip Cet wrote:
> Even if memory isn't exhausted, creating a bignum larger than 16 GB
> (our most-positive-bignum) results in an immediate crash with external
> libgmp (Linux, x86_64), and that appears not to be easy to fix without
> modifying gmp.
Is there a libgmp bug report for this? or is there a reasonable way to
characterize this arbitrary limitation in libgmp, so that Emacs does not go over
the limit and crash? I've already put in one limit, and we can tighten that
limit (or add more checks) if we know what libgmp's limits are.
> That and left shifts are probably the ones to worry about for now.
> Creating a large bignum by repeated multiplication will require at
> least some intermediate bignums, which need to be allocated and copied
> and thus probably alert the user to something going on.
expt does bignums now too, so that's one more point of failure in this area.
next prev parent reply other threads:[~2018-08-19 10:59 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 3:29 bug#32463: 27.0.50; (logior -1) => 4611686018427387903 Katsumi Yamaoka
2018-08-17 5:59 ` Pip Cet
2018-08-17 7:40 ` Katsumi Yamaoka
2018-08-17 9:27 ` Andy Moreton
2018-08-17 11:36 ` Pip Cet
2018-08-17 11:53 ` Pip Cet
2018-08-17 13:27 ` Andy Moreton
2018-08-18 22:43 ` Paul Eggert
2018-08-17 13:24 ` Andy Moreton
2018-08-18 18:48 ` Paul Eggert
2018-08-18 18:59 ` Eli Zaretskii
2018-08-18 19:58 ` Pip Cet
2018-08-18 22:27 ` Paul Eggert
2018-08-19 15:03 ` Eli Zaretskii
2018-08-18 19:59 ` Paul Eggert
2018-08-18 19:45 ` Andy Moreton
2018-08-19 10:43 ` Live System User
2018-08-20 3:02 ` Richard Stallman
2018-08-20 3:47 ` Paul Eggert
2018-08-21 3:37 ` Richard Stallman
2018-08-18 22:56 ` Paul Eggert
2018-08-18 23:17 ` Paul Eggert
2018-08-19 10:34 ` Andy Moreton
2018-08-19 10:48 ` Pip Cet
2018-08-19 10:59 ` Paul Eggert [this message]
2018-08-19 11:32 ` Pip Cet
2018-08-21 9:40 ` Paul Eggert
2018-08-21 10:50 ` Andy Moreton
2018-08-21 14:36 ` Eli Zaretskii
2018-08-21 14:52 ` Andy Moreton
2018-08-21 17:24 ` Paul Eggert
2018-08-19 10:52 ` Paul Eggert
2018-08-22 2:29 ` Paul Eggert
2018-08-22 16:56 ` Tom Tromey
2018-08-22 17:52 ` Paul Eggert
2018-08-22 18:25 ` Eli Zaretskii
2018-08-23 0:28 ` Paul Eggert
2018-08-23 2:39 ` Eli Zaretskii
2018-08-19 18:00 ` Andy Moreton
2018-08-22 2:34 ` Paul Eggert
2018-08-22 23:27 ` Andy Moreton
2018-08-23 14:05 ` Eli Zaretskii
2018-08-22 2:56 ` Paul Eggert
2018-08-22 8:20 ` Andy Moreton
2018-08-22 8:39 ` Andy Moreton
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=c81bb6fc-edff-3f06-e4ba-9fd18465a585@cs.ucla.edu \
--to=eggert@cs.ucla.edu \
--cc=32463@debbugs.gnu.org \
--cc=andrewjmoreton@gmail.com \
--cc=pipcet@gmail.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.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).