From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Andy Moreton Newsgroups: gmane.emacs.bugs Subject: bug#32463: 27.0.50; (logior -1) => 4611686018427387903 Date: Sun, 19 Aug 2018 11:34:55 +0100 Message-ID: <866006tzjk.fsf@gmail.com> References: <5230a57b-5896-606d-f157-2e547710b6e8@cs.ucla.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1534674847 23019 195.159.176.226 (19 Aug 2018 10:34:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 19 Aug 2018 10:34:07 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (windows-nt) To: 32463@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Aug 19 12:34:03 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1frL22-0005p5-Vn for geb-bug-gnu-emacs@m.gmane.org; Sun, 19 Aug 2018 12:34:03 +0200 Original-Received: from localhost ([::1]:42344 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frL47-0006LO-Sx for geb-bug-gnu-emacs@m.gmane.org; Sun, 19 Aug 2018 06:36:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41270) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frL42-0006LC-FO for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:36:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1frL3y-0008V2-51 for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:36:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:49382) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1frL3y-0008Uy-2W for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:36:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1frL3x-00006n-Vk for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:36:02 -0400 X-Loop: help-debbugs@gnu.org In-Reply-To: Resent-From: Andy Moreton Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 19 Aug 2018 10:36:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 32463 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.1534674916363 (code B ref -1); Sun, 19 Aug 2018 10:36:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 19 Aug 2018 10:35:16 +0000 Original-Received: from localhost ([127.0.0.1]:54400 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1frL3E-00005n-38 for submit@debbugs.gnu.org; Sun, 19 Aug 2018 06:35:16 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:48398) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1frL3C-00005a-Sd for submit@debbugs.gnu.org; Sun, 19 Aug 2018 06:35:15 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1frL37-0008Be-6g for submit@debbugs.gnu.org; Sun, 19 Aug 2018 06:35:09 -0400 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:41813) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1frL37-0008BT-4E for submit@debbugs.gnu.org; Sun, 19 Aug 2018 06:35:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41146) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1frL36-0005mx-DI for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:35:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1frL33-0008Ao-Af for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:35:08 -0400 Original-Received: from [195.159.176.226] (port=51992 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1frL33-0008Ah-3v for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 06:35:05 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1frL0u-0004Oy-71 for bug-gnu-emacs@gnu.org; Sun, 19 Aug 2018 12:32:52 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 17 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:BVHAMESTmQywu1OQNq+y09/0lCE= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:149587 Archived-At: On Sat 18 Aug 2018, Paul Eggert wrote: > My bigger concern is memory management, along with integer overflow in size or > bitcount calculation. Copies are made of bignums when not needed, behavior is > dicey if memory is exhausted during bignum computation, and I'm afraid C-g > will have problems when bignums get large. I don't have a good handle on this > stuff yet. I have put in some sanity checks (e.g., see check_bignum_size in > emacs.c) but I suspect more are needed. In particular, Fexpt will need to be > careful as it is a good way to explode a bignum's size. Indeed. There are many places that create a temporary bignum, and thus call mpz_init/mpz_clear frequently. I haven't profiled this, but it may be an opportunuty for some optimization. Fixing C-g will require awkward changes to either GMP and/or emacs. AndyM