From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: YAMAMOTO Mitsuharu Newsgroups: gmane.emacs.bugs Subject: bug#3399: Crash in multi-TTY mode Date: Fri, 29 May 2009 12:58:20 +0900 Organization: Faculty of Science, Chiba University Message-ID: References: <8369-76746@sneakemail.com> Reply-To: YAMAMOTO Mitsuharu , 3399@emacsbugs.donarmstrong.com NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Trace: ger.gmane.org 1243570743 1555 80.91.229.12 (29 May 2009 04:19:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 29 May 2009 04:19:03 +0000 (UTC) Cc: 3399@emacsbugs.donarmstrong.com, Shannon Jones To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri May 29 06:19:00 2009 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1M9tYZ-0004az-QI for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 May 2009 06:19:00 +0200 Original-Received: from localhost ([127.0.0.1]:44233 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1M9tYZ-0000NT-5Y for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 May 2009 00:18:59 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1M9tX3-0008DF-Bs for bug-gnu-emacs@gnu.org; Fri, 29 May 2009 00:17:25 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1M9tWy-0008CD-Ho for bug-gnu-emacs@gnu.org; Fri, 29 May 2009 00:17:24 -0400 Original-Received: from [199.232.76.173] (port=45970 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1M9tWy-0008C8-7U for bug-gnu-emacs@gnu.org; Fri, 29 May 2009 00:17:20 -0400 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:60205) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1M9tWx-0001e6-Ng for bug-gnu-emacs@gnu.org; Fri, 29 May 2009 00:17:20 -0400 Original-Received: from rzlab.ucr.edu (rzlab.ucr.edu [127.0.0.1]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id n4T4HGZm009315; Thu, 28 May 2009 21:17:17 -0700 Original-Received: (from debbugs@localhost) by rzlab.ucr.edu (8.14.3/8.14.3/Submit) id n4T454Lq007006; Thu, 28 May 2009 21:05:04 -0700 X-Loop: owner@emacsbugs.donarmstrong.com Resent-From: YAMAMOTO Mitsuharu Resent-To: bug-submit-list@donarmstrong.com Resent-CC: Emacs Bugs Resent-Date: Fri, 29 May 2009 04:05:04 +0000 Resent-Message-ID: Resent-Sender: owner@emacsbugs.donarmstrong.com X-Emacs-PR-Message: followup 3399 X-Emacs-PR-Package: emacs X-Emacs-PR-Keywords: Original-Received: via spool by 3399-submit@emacsbugs.donarmstrong.com id=B3399.12435695086015 (code B ref 3399); Fri, 29 May 2009 04:05:04 +0000 Original-Received: (at 3399) by emacsbugs.donarmstrong.com; 29 May 2009 03:58:28 +0000 X-Spam-Bayes: score:0.5 Bayes not run. spammytokens:Tokens not available. hammytokens:Tokens not available. Original-Received: from mathmail.math.s.chiba-u.ac.jp (mathmail.math.s.chiba-u.ac.jp [133.82.132.2]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id n4T3wNsa006010 for <3399@emacsbugs.donarmstrong.com>; Thu, 28 May 2009 20:58:25 -0700 Original-Received: from church.math.s.chiba-u.ac.jp (church [133.82.132.36]) by mathmail.math.s.chiba-u.ac.jp (Postfix) with ESMTP id E93AE2C40; Fri, 29 May 2009 12:58:20 +0900 (JST) In-Reply-To: User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 =?UTF-8?Q?(Shij=C5=8D)?= APEL/10.6 Emacs/22.3 (sparc-sun-solaris2.8) MULE/5.0 (SAKAKI) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 2) Resent-Date: Fri, 29 May 2009 00:17:24 -0400 X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:28281 Archived-At: >>>>> On Thu, 28 May 2009 09:14:06 -0400, Stefan Monnier said: >> 1. Older libX11 that doesn't care about XlibDisplayDfltRMDB at all. >> 2. Newer libX11, when the first XGetDefault call sets dpy->db to a >> non-NULL value. >> 3. Newer libX11, when the first XGetDefault call sets dpy->db to NULL. >> Case 3 corresponds to the problematic scenario I mentioned in my >> previous mail and the other cases should work fine currently. Undoing >> my recent change means that we don't destroy the database ourselves, >> and it leaks memory in Case 2 and 3. As I corrected, the memory leak happens only in Case 2, which is the most common case I guess. > What if (as asked) we don't just undo your change, but additionally > return to freeing the DB (so we'll get a crash in case 1)? Will we then > also get a crash in case 2 or 3? It will crash in Case 3 as well as 1. XCloseDisplay destroys the associated database because XlibDisplayDfltRMDB is set, although the database was not actually what's allocated by some XGetDefault call. That's why I consider this is a bug in libX11. YAMAMOTO Mitsuharu mituharu@math.s.chiba-u.ac.jp