From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Preview: portable dumper Date: Thu, 1 Dec 2016 09:58:20 -0800 Organization: UCLA Computer Science Department Message-ID: <8cbe0df1-7c1d-a845-5bd7-792be25fa44f@cs.ucla.edu> References: <047a67ec-9e29-7e4e-0fb0-24c3e59b5886@dancol.org> <83zikjxt1j.fsf@gnu.org> <8360n6ruzu.fsf@gnu.org> <0839b53b-4607-144f-3746-db054a29c1cd@cs.ucla.edu> <83zikiqdu5.fsf@gnu.org> <834m2orkhn.fsf@gnu.org> <96a00b2f-4012-5e66-9d67-7644039600e2@cs.ucla.edu> <83lgw0pbmv.fsf@gnu.org> <2b4b38b8-9fb0-9fe9-2e1e-823aae7b84b1@cs.ucla.edu> <83a8cfpnlo.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1480615158 21194 195.159.176.226 (1 Dec 2016 17:59:18 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 1 Dec 2016 17:59:18 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 Cc: dancol@dancol.org, rms@gnu.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Dec 01 18:59:03 2016 Return-path: Envelope-to: ged-emacs-devel@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 1cCVdO-0003FW-8M for ged-emacs-devel@m.gmane.org; Thu, 01 Dec 2016 18:59:02 +0100 Original-Received: from localhost ([::1]:58035 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cCVdS-00061x-5R for ged-emacs-devel@m.gmane.org; Thu, 01 Dec 2016 12:59:06 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53617) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cCVcs-00060t-0w for emacs-devel@gnu.org; Thu, 01 Dec 2016 12:58:34 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cCVcr-0002Jt-AX for emacs-devel@gnu.org; Thu, 01 Dec 2016 12:58:30 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:36442) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cCVcn-0002IK-En; Thu, 01 Dec 2016 12:58:25 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 6CE331600C8; Thu, 1 Dec 2016 09:58:22 -0800 (PST) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id BFauZJeQV8FY; Thu, 1 Dec 2016 09:58:20 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id A70E31600CF; Thu, 1 Dec 2016 09:58:20 -0800 (PST) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 2nyPsgRlywcW; Thu, 1 Dec 2016 09:58:20 -0800 (PST) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 8E4AD1600C8; Thu, 1 Dec 2016 09:58:20 -0800 (PST) In-Reply-To: <83a8cfpnlo.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:209885 Archived-At: On 12/01/2016 09:26 AM, Eli Zaretskii wrote: >> >This was no accident. They removed it because it was producing bogus values, and it didn't reflect how FreeBSD actually allocates memory. > And they are thinking on bringing it back, see > > https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24892#92 That thread discusses their implementing sbrk as always returning 0 or something trivial like that, purely to pacify broken applications that use sbrk (0) to estimate memory usage and fail to build if sbrk does not exist. Such a workaround obviously won't get Emacs running. In contrast, Daniel's proposed patch should work.