From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: When should ralloc.c be used? (WAS: bug#24358) Date: Wed, 26 Oct 2016 05:37:58 +0300 Message-ID: <83pomnvnqx.fsf@gnu.org> References: <87twe6sx2g.fsf@users.sourceforge.net> <87eg51ng4r.fsf_-_@users.sourceforge.net> <87k2djwumn.fsf@users.sourceforge.net> <83h98nidvd.fsf@gnu.org> <87eg3rvtsf.fsf@users.sourceforge.net> <83k2dihpm9.fsf@gnu.org> <8760p2wzgj.fsf@users.sourceforge.net> <838ttyhhzu.fsf@gnu.org> <871szqwu51.fsf@users.sourceforge.net> <831szqhbc2.fsf@gnu.org> <87d1itt79z.fsf_-_@users.sourceforge.net> <7baa18d4-2b09-caa8-005e-29008a383ad1@cs.ucla.edu> <83mvhwrgd5.fsf@gnu.org> <8539f38f-9a11-44c3-4de7-bb974c96206c@cs.ucla.edu> <83d1iq5ib1.fsf@gnu.org> <83r3753c8j.fsf@gnu.org> <20161025190045.1b1d9e86@jabberwock.cb.piermont.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1477449795 27462 195.159.176.226 (26 Oct 2016 02:43:15 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 26 Oct 2016 02:43:15 +0000 (UTC) Cc: eggert@cs.ucla.edu, emacs-devel@gnu.org, rms@gnu.org, npostavs@users.sourceforge.net To: "Perry E. Metzger" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Oct 26 04:43:10 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 1bzEB2-0004PE-LX for ged-emacs-devel@m.gmane.org; Wed, 26 Oct 2016 04:42:52 +0200 Original-Received: from localhost ([::1]:59287 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzEB5-0004to-5Q for ged-emacs-devel@m.gmane.org; Tue, 25 Oct 2016 22:42:55 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40406) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzE6T-00024d-SQ for emacs-devel@gnu.org; Tue, 25 Oct 2016 22:38:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bzE6Q-00042b-Qj for emacs-devel@gnu.org; Tue, 25 Oct 2016 22:38:09 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:54845) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzE6Q-00042U-NH; Tue, 25 Oct 2016 22:38:06 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1834 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1bzE6I-0004iA-P2; Tue, 25 Oct 2016 22:37:59 -0400 In-reply-to: <20161025190045.1b1d9e86@jabberwock.cb.piermont.com> (perry@piermont.com) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e 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:208819 Archived-At: > Date: Tue, 25 Oct 2016 19:00:45 -0400 > From: "Perry E. Metzger" > Cc: rms@gnu.org, npostavs@users.sourceforge.net, eggert@cs.ucla.edu, > emacs-devel@gnu.org > > On Mon, 24 Oct 2016 20:09:32 +0300 Eli Zaretskii wrote: > > > > It imposes hard-to-fulfill requirements on functions that get > > > > C pointers to buffer text or to Lisp string data: those > > > > functions must never call malloc, directly or indirectly. > > > > > > I think the way to fix those is by systematically looking at the > > > source for them, rather than by debugging. > > > > Yes, but finding out whether this is so is not easy, because the > > malloc call is sometimes buried very deep. > > Could this be found by doing a debugging build where malloc > aborts in the conditions where it can't be called directly or > indirectly? I don't know how to define those conditions. If you have concrete suggestions, please describe them.