From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: grischka Newsgroups: gmane.emacs.devel Subject: Re: Segfault in current bzr Date: Tue, 28 Sep 2010 19:19:14 +0200 Message-ID: <4CA22392.2070103@gmx.de> References: 87mxr2ddmn.fsf@lola.goethe.zz <4CA1CD1F.3010604@gmx.de> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1285694385 1258 80.91.229.12 (28 Sep 2010 17:19:45 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 28 Sep 2010 17:19:45 +0000 (UTC) Cc: dak@gnu.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Sep 28 19:19:42 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1P0dq4-0003Ul-EV for ged-emacs-devel@m.gmane.org; Tue, 28 Sep 2010 19:19:36 +0200 Original-Received: from localhost ([127.0.0.1]:33619 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1P0dq3-0003W5-RE for ged-emacs-devel@m.gmane.org; Tue, 28 Sep 2010 13:19:35 -0400 Original-Received: from [140.186.70.92] (port=38864 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1P0dpy-0003W0-Eh for emacs-devel@gnu.org; Tue, 28 Sep 2010 13:19:31 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1P0dpw-00024H-Dl for emacs-devel@gnu.org; Tue, 28 Sep 2010 13:19:30 -0400 Original-Received: from mailout-de.gmx.net ([213.165.64.22]:34012 helo=mail.gmx.net) by eggs.gnu.org with smtp (Exim 4.69) (envelope-from ) id 1P0dpv-00023y-VT for emacs-devel@gnu.org; Tue, 28 Sep 2010 13:19:28 -0400 Original-Received: (qmail invoked by alias); 28 Sep 2010 17:19:25 -0000 Original-Received: from unknown (EHLO [10.45.47.152]) [82.113.121.201] by mail.gmx.net (mp036) with SMTP; 28 Sep 2010 19:19:25 +0200 X-Authenticated: #18588216 X-Provags-ID: V01U2FsdGVkX193jxwF4KF3y3Fgoo9Lvd382cVY9Wbe2713tTcIun yx7rn36U5bQrXs User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) In-Reply-To: X-Y-GMX-Trusted: 0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:131054 Archived-At: Eli Zaretskii wrote: >> Date: Tue, 28 Sep 2010 13:10:23 +0200 >> From: grischka >> Cc: emacs-devel@gnu.org >> >> Typically emacs: They're rather able to give people a lecture about >> gcc options than to add a simple one-line wrapper for abort to print >> the file:linenumber. > > Aha, and then we will see something like this: > > #1 0x00000000004ebc25 in abort () at emacs.c:427 > #2 0x00000000deadbeef in abort_wrapper (file=, > line=) at grishka.c:1234 > #3 0x00000000005a5dd9 in wait_reading_process_output ( > time_limit=, microsecs=, > read_kbd=-1, do_display=, > wait_for_cell=, wait_proc=0x0, just_wait_proc=0) > at process.c:5072 No, you'd see: emax: internal error at process.c:5072. Aborting. Which while you just started to preach the user how to use gcc and gdb might very well suffice for someone else to be done with the problem already. --- grischka > > (gdb) frame 2 > #2 0x000000000045babe in abort_wrapper (file=, > line=) at grishka.c:1234 > (gdb) print file > No symbol "file" in current context. > (gdb) print line > No symbol "line" in current context. > (gdb) > > Very useful, very informative. > > Debugging an optimized build is practically impossible, with current > versions of GCC. End of story. >