From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Jim Meyering Newsgroups: gmane.emacs.devel Subject: Re: editfns.c (Fformat): fix for segfault Date: Wed, 07 May 2003 11:27:23 +0200 Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: <85addz5cp0.fsf@pi.meyering.net> References: <851xzo9f2l.fsf@pi.meyering.net> <85n0i4yvbs.fsf@pi.meyering.net> <85n0i1bwzr.fsf@pi.meyering.net> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1052299642 17172 80.91.224.249 (7 May 2003 09:27:22 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Wed, 7 May 2003 09:27:22 +0000 (UTC) Cc: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Wed May 07 11:27:20 2003 Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 19DLCT-0004QM-00 for ; Wed, 07 May 2003 11:26:57 +0200 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian)) id 19DLGN-0001Wp-00 for ; Wed, 07 May 2003 11:31:00 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 19DLDJ-0000bX-08 for emacs-devel@quimby.gnus.org; Wed, 07 May 2003 05:27:49 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13) id 19DLCx-0000Zm-00 for emacs-devel@gnu.org; Wed, 07 May 2003 05:27:27 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13) id 19DLCw-0000Yc-00 for emacs-devel@gnu.org; Wed, 07 May 2003 05:27:26 -0400 Original-Received: from anice-201-1-1-11.abo.wanadoo.fr ([80.13.35.11] helo=elf.meyering.net) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 19DLCv-0000XL-00; Wed, 07 May 2003 05:27:25 -0400 Original-Received: by elf.meyering.net (Postfix, from userid 1002) id 9063B415F; Wed, 7 May 2003 11:27:23 +0200 (CEST) Original-To: rms@gnu.org In-Reply-To: (Richard Stallman's message of "Mon, 05 May 2003 15:10:58 -0400") Original-Lines: 76 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Emacs development discussions. List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:13732 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:13732 Richard Stallman wrote: > I applied that patch and rebuilt yesterday. > It just aborted: > > Program received signal SIGABRT, Aborted. > 0x402e2a41 in kill () from /lib/libc.so.6 > (gdb) w > #0 0x402e2a41 in kill () from /lib/libc.so.6 > #1 0x080fef29 in abort () at /mirror/d/emacs/src/emacs.c:412 > #2 0x0815f2bd in Fgarbage_collect () at /mirror/d/emacs/src/alloc.c:4103 > #3 0x08179c26 in Ffuncall (nargs=3, args=0xbfffd8e0) > at /mirror/d/emacs/src/eval.c:2664 > #4 0x08179a2e in run_hook_list_with_args (funlist=1492461932, nargs=3, > args=0xbfffd8e0) at /mirror/d/emacs/src/eval.c:2446 > #5 0x0812aeac in signal_before_change (start_int=1, end_int=11, > preserve_ptr=0xbfffd9e0) at /mirror/d/emacs/src/insdel.c:2058 > > Binding Qinhibit_modification_hooks to t should have made > signal_before_change return near the beginning. Can you find > out why this did not work? I set a watchpoint for inhibit_modification_hooks, and found that it changes very frequently. Is that expected? In fact, it changes so frequently, that attaching a useful action (like `where' or xbacktrace) to it makes emacs+Gnus nearly unusable. I presume the goal is to find out which code sets it to 0 just before the abort. I could endure that if there were some way to trigger the abort more quickly. I can't use such an impaired program for the entire day or so it usually seems to take. For example, after stopping at a breakpoint in Fgarbage_collect, I enabled the inhibit_modification_hooks watchpoint and `finish'ed that function. The watchpoint was hit *many* times: Hardware watchpoint 5: inhibit_modification_hooks Old value = 1 New value = 0 store_symval_forwarding (symbol=406073020, valcontents=674503112, newval=405897284, buf=0x8578e28) at /mirror/d/emacs/src/data.c:889 889 break; (gdb) w #0 store_symval_forwarding (symbol=406073020, valcontents=674503112, newval=405897284, buf=0x8578e28) at /mirror/d/emacs/src/data.c:889 #1 0x081645ab in set_internal (symbol=406073020, newval=405897284, buf=0x8578e28, bindflag=1) at /mirror/d/emacs/src/data.c:1243 #2 0x0817ad54 in unbind_to (count=2, value=405897284) at /mirror/d/emacs/src/eval.c:3106 #3 0x080705c0 in with_echo_area_buffer (w=0x0, which=0, fn=0x8071296 , a1=-1073747996, a2=405897284, a3=0, a4=0) at /mirror/d/emacs/src/xdisp.c:6809 #4 0x08071279 in current_message () at /mirror/d/emacs/src/xdisp.c:7227 #5 0x080712ef in push_message () at /mirror/d/emacs/src/xdisp.c:7262 #6 0x0815f2f3 in Fgarbage_collect () at /mirror/d/emacs/src/alloc.c:4117 #7 0x0810510d in read_char (commandflag=1, nmaps=8, maps=0xbfffeaf0, prev_event=405897284, used_mouse_menu=0xbfffebdc) at /mirror/d/emacs/src/keyboard.c:2717 #8 0x0810e1a0 in read_key_sequence (keybuf=0xbfffed50, bufsize=30, prompt=405897284, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at /mirror/d/emacs/src/keyboard.c:8581 #9 0x0810242b in command_loop_1 () at /mirror/d/emacs/src/keyboard.c:1507 #10 0x08177cd8 in internal_condition_case (bfun=0x810209a , handlers=405993916, hfun=0x8101c37 ) at /mirror/d/emacs/src/eval.c:1333 #11 0x08101f5e in command_loop_2 () at /mirror/d/emacs/src/keyboard.c:1295 #12 0x08177789 in internal_catch (tag=405955220, func=0x8101f3f , arg=405897284) at /mirror/d/emacs/src/eval.c:1094 #13 0x08101f11 in command_loop () at /mirror/d/emacs/src/keyboard.c:1274 #14 0x081019de in recursive_edit_1 () at /mirror/d/emacs/src/keyboard.c:990 #15 0x08101b0d in Frecursive_edit () at /mirror/d/emacs/src/keyboard.c:1046 #16 0x08100505 in main (argc=3, argv=0xbffff364) at /mirror/d/emacs/src/emacs.c:1659