From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: "corrupted size vs. prev_size" Date: Tue, 12 Apr 2022 12:59:38 +0200 Message-ID: <87mtgqworp.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36191"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: "emacs-devel@gnu.org" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Apr 12 13:02:57 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1neEIS-0009A5-Pi for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Apr 2022 13:02:56 +0200 Original-Received: from localhost ([::1]:41794 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1neEIR-0000j8-Ot for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Apr 2022 07:02:55 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:52048) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1neEFQ-0007IM-8h for emacs-devel@gnu.org; Tue, 12 Apr 2022 06:59:48 -0400 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:36186) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1neEFO-0003mX-G3 for emacs-devel@gnu.org; Tue, 12 Apr 2022 06:59:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From: Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=1OfJmT0p0jJzHAw/nMBJf6H8ljdJWz/1zQB8T/0AZIg=; b=dk2cB0uhw2rN5goDtrC2i16Z8+ TtqlljJLVcx3HiLw9XSAsXjnUgDn5RmbPL7kryg10pDWGHkVSbjNSa3LAjQsQsR/t9U7FILxrhr9H zmJwTzZE2a+BycfV7QXeWnl2XUkJF4zgwEEzVf+k79fHijepeT686BbnZpsPcdM9VqDU=; Original-Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1neEFG-0007MH-IU for emacs-devel@gnu.org; Tue, 12 Apr 2022 12:59:41 +0200 Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:288284 Archived-At: After the recent GIF/WebP caching changes, I sometimes get "corrupted size vs. prev_size" and Emacs then hangs, so I guess I'm messing up something in the memory allocation/freeing/writing bits somewhere. But I'm getting it very, very rarely -- like one out of every thirty times with a bunch of WebP/GIF images, so it's hard to track down. Connecting to the hung Emacs isn't very informative: (gdb) info threads Id Target Id Frame * 1 Thread 0x7f303a430000 (LWP 84136) "emacs" 0x00007f303d54e1f3 in __pselect (nfds=22, readfds=0x7ffd058d69e0, writefds=0x7ffd058d6a60, exceptfds=0x0, timeout=0x7ffd058d6800, sigmask=) at ../sysdeps/unix/sysv/linux/pselect.c:52 2 Thread 0x7f3039229640 (LWP 84137) "gmain" 0x00007f303d54b87f in __GI___poll (fds=0x561b63028870, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 3 Thread 0x7f303898c640 (LWP 84138) "gdbus" 0x00007f303d54b87f in __GI___poll (fds=0x561b63452d20, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 4 Thread 0x7f3033fff640 (LWP 84139) "dconf worker" 0x00007f303d54b87f in __GI___poll (fds=0x561b634be7d0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 I've stared at the code for some time now to see whether I can track the problem down that way -- perhaps I've got some lifetime issues; deallocating webp iterators twice, for instance, or something similar in the gif code. Does anybody else see something obviously wonky in that code in gif_load or webp_load? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no