From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#41357: 28.0.50; GC may miss to mark calle safe register content Date: Sun, 17 May 2020 22:19:52 +0300 Message-ID: <83y2pq9xnr.fsf@gnu.org> References: <83pnb2bmk2.fsf@gnu.org> <8f0c7763-9210-aa29-7cee-945b8494d827@cs.ucla.edu> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="3291"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 41357@debbugs.gnu.org, pipcet@gmail.com, akrl@sdf.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun May 17 21:21:09 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1jaOqS-0000mQ-QJ for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 17 May 2020 21:21:08 +0200 Original-Received: from localhost ([::1]:41052 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jaOqR-0000HO-Sg for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 17 May 2020 15:21:07 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47034) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jaOqM-0000HH-KK for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 15:21:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:33232) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jaOqM-0000pP-Bk for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 15:21:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jaOqM-0001hL-7J for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 15:21:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 17 May 2020 19:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 41357 X-GNU-PR-Package: emacs Original-Received: via spool by 41357-submit@debbugs.gnu.org id=B41357.15897432086437 (code B ref 41357); Sun, 17 May 2020 19:21:02 +0000 Original-Received: (at 41357) by debbugs.gnu.org; 17 May 2020 19:20:08 +0000 Original-Received: from localhost ([127.0.0.1]:44778 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jaOpU-0001fl-2O for submit@debbugs.gnu.org; Sun, 17 May 2020 15:20:08 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:39554) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jaOpS-0001fK-Q4 for 41357@debbugs.gnu.org; Sun, 17 May 2020 15:20:07 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:36873) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jaOpM-0000VP-Fn; Sun, 17 May 2020 15:20:00 -0400 Original-Received: from [176.228.60.248] (port=1293 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jaOpL-0006Zh-UX; Sun, 17 May 2020 15:20:00 -0400 In-Reply-To: (message from Paul Eggert on Sun, 17 May 2020 12:01:40 -0700) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:180502 Archived-At: > Cc: Andrea Corallo , Eli Zaretskii , > 41357@debbugs.gnu.org > From: Paul Eggert > Date: Sun, 17 May 2020 12:01:40 -0700 > > On 5/17/20 10:00 AM, Pip Cet wrote: > > I don't think that platform even has callee-saved registers? > > Eli's platform is 32-bit Microsoft Windows, and W32 has four callee-save > registers (ebx, esi, edi, ebp) not counting esp and eip which are of course > callee-save by definition. So the problem could at least in theory be occurring > on his platform, depending on the compiler and its options. I've seen the same problem on 64-bit Windows as well, in Emacs compiled with a different (newer) version of GCC. I don't think this has anything to do with how many registers are there. I also never before saw these problems, so this is most definitely due to some recent changes, I just cannot yet figure out which ones.