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: Tue, 29 Nov 2016 14:34:05 -0800 Organization: UCLA Computer Science Department Message-ID: References: <047a67ec-9e29-7e4e-0fb0-24c3e59b5886@dancol.org> <9b6a0571-b2ae-a5dd-a643-3595e8f71cd6@cs.ucla.edu> 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 1480458892 15760 195.159.176.226 (29 Nov 2016 22:34:52 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 29 Nov 2016 22:34:52 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 Cc: emacs-devel@gnu.org To: Philipp Stephani Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Nov 29 23:34:48 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 1cBqzA-0003CZ-13 for ged-emacs-devel@m.gmane.org; Tue, 29 Nov 2016 23:34:48 +0100 Original-Received: from localhost ([::1]:39548 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cBqzD-0001UO-Ls for ged-emacs-devel@m.gmane.org; Tue, 29 Nov 2016 17:34:51 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39390) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cBqya-0001UI-9z for emacs-devel@gnu.org; Tue, 29 Nov 2016 17:34:13 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cBqyW-0001ol-CF for emacs-devel@gnu.org; Tue, 29 Nov 2016 17:34:12 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:50774) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cBqyW-0001np-6K for emacs-devel@gnu.org; Tue, 29 Nov 2016 17:34:08 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id C8632160129; Tue, 29 Nov 2016 14:34:06 -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 WVstoJ0FQ9B9; Tue, 29 Nov 2016 14:34:06 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 2065216012B; Tue, 29 Nov 2016 14:34:06 -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 Izyj-QGs9NTN; Tue, 29 Nov 2016 14:34:06 -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 07D0D160129; Tue, 29 Nov 2016 14:34:06 -0800 (PST) In-Reply-To: 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:209778 Archived-At: On 11/29/2016 02:22 PM, Philipp Stephani wrote: > I see nothing that would prevent dumping with ASLR enabled. Yes, that's correct. It's a performance thing, not a correctness thing. If Emacs undumps into the same address that it dumped from then it can avoid relocating some pointers, which should save some work and avoid making some copies (assuming copy-on-write).