From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: YAMAMOTO Mitsuharu Newsgroups: gmane.emacs.bugs Subject: bug#16039: repeated emacs crashes (in GC?) Date: Wed, 04 Dec 2013 09:43:00 +0900 Organization: Faculty of Science, Chiba University Message-ID: References: <83k3fl53fy.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Trace: ger.gmane.org 1386117853 28824 80.91.229.3 (4 Dec 2013 00:44:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 4 Dec 2013 00:44:13 +0000 (UTC) Cc: 16039@debbugs.gnu.org, emacs user To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Dec 04 01:44:16 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Vo0Zc-0007Pk-9N for geb-bug-gnu-emacs@m.gmane.org; Wed, 04 Dec 2013 01:44:16 +0100 Original-Received: from localhost ([::1]:45681 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vo0Zb-0002dS-UH for geb-bug-gnu-emacs@m.gmane.org; Tue, 03 Dec 2013 19:44:15 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45216) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vo0ZT-0002UW-Dy for bug-gnu-emacs@gnu.org; Tue, 03 Dec 2013 19:44:12 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Vo0ZO-0001T2-1J for bug-gnu-emacs@gnu.org; Tue, 03 Dec 2013 19:44:07 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:42985) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vo0ZN-0001Sy-UN for bug-gnu-emacs@gnu.org; Tue, 03 Dec 2013 19:44:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Vo0ZN-0001LZ-LM for bug-gnu-emacs@gnu.org; Tue, 03 Dec 2013 19:44:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: YAMAMOTO Mitsuharu Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 04 Dec 2013 00:44:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 16039 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 16039-submit@debbugs.gnu.org id=B16039.13861177885099 (code B ref 16039); Wed, 04 Dec 2013 00:44:01 +0000 Original-Received: (at 16039) by debbugs.gnu.org; 4 Dec 2013 00:43:08 +0000 Original-Received: from localhost ([127.0.0.1]:57004 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vo0YV-0001KA-OM for submit@debbugs.gnu.org; Tue, 03 Dec 2013 19:43:08 -0500 Original-Received: from mathmail.math.s.chiba-u.ac.jp ([133.82.132.2]:51594) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vo0YT-0001Jm-2q for 16039@debbugs.gnu.org; Tue, 03 Dec 2013 19:43:06 -0500 Original-Received: from fermat.math.s.chiba-u.ac.jp (fermat [133.82.132.10]) by mathmail.math.s.chiba-u.ac.jp (Postfix) with ESMTP id 73A95C055D; Wed, 4 Dec 2013 09:43:00 +0900 (JST) In-Reply-To: <83k3fl53fy.fsf@gnu.org> User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (=?UTF-8?Q?Shij=C5=8D?=) APEL/10.6 Emacs/22.3 (sparc-sun-solaris2.8) MULE/5.0 (SAKAKI) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:81341 Archived-At: >>>>> On Tue, 03 Dec 2013 18:01:21 +0200, Eli Zaretskii said: >> I wrote YAMAMOTO Mitsuharu, the Emacs for mac developer, and his >> response is >> >> > The backtrace shows that the stack is used up because some deeply >> > nested Lisp data structure is recursively traversed in garbage > >> > collection (or possibly an unknown bug in the GC code). In >> > normal OSX applications, the stack depth for the main thread is >> > set to 8MiB by default, and Emacs slightly enlarges it to >> > 8720000B (on 64-bit binary) by some formula in src/emacs.c: > What is the evidence that the stack is used up? The backtrace shows it crashed by accessing the address exceeding the stack boundary: * thread #1: tid = 0x484e3, 0x00000001000f61d1 Emacs`mark_object + 1073, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=2, address=0x7fff5f3aeff8) Below is extracted from the memory map (% vmmap -interleaved PID): STACK GUARD 00007fff5bc00000-00007fff5f3af000 [ 55.7M] ---/rwx SM=NUL stack guard for thread 0 Stack 00007fff5f3af000-00007fff5f400000 [ 324K] rw-/rwx SM=NUL thread 0 Stack 00007fff5f400000-00007fff5fbff000 [ 8188K] rw-/rwx SM=PRV thread 0 > Having 136 thousand frames during GC is not unheard of. (/ 8720000.0 (* 136 1000)) 64.11764705882354 If each frame consumes more than 64 bytes, then it will use up 8720000B stack space. YAMAMOTO Mitsuharu mituharu@math.s.chiba-u.ac.jp