From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: aidalgol@amuri.net Newsgroups: gmane.emacs.bugs Subject: bug#18438: 24.4.50; assertion failed in bidi.c Date: Thu, 18 Sep 2014 16:59:34 +1200 Message-ID: <9e9d2525ec6fde394c3be85b2a97a306@amuri.net> References: <4745242cd3e424a6c4d5db0e8d3e33d0@amuri.net> <54109EB5.2060801@amuri.net> <8338bz9tt7.fsf@gnu.org> <153d642db591b29dba44712b44194385@amuri.net> <8361gt8jjz.fsf@gnu.org> <8338bx8enz.fsf@gnu.org> <47b6853869d32221142fecc7dff1d3e8@amuri.net> <83sijs46yu.fsf@gnu.org> <83ppev4ouy.fsf@gnu.org> <8361gm4yy1.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1411019110 15492 80.91.229.3 (18 Sep 2014 05:45:10 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 18 Sep 2014 05:45:10 +0000 (UTC) To: <18438@debbugs.gnu.org> Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Sep 18 07:45:04 2014 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 1XUUWe-0006V3-ES for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 18 Sep 2014 05:00:02 +0000 Original-Received: (at 18438) by debbugs.gnu.org; 18 Sep 2014 04:59:34 +0000 Original-Received: from localhost ([127.0.0.1]:43810 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XUTob-0003Qo-7M for submit@debbugs.gnu.org; Thu, 18 Sep 2014 00:59:33 -0400 Original-Received: from goat.amuri.net ([203.99.132.195]:38645) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XUToY-0003Qf-P7 for 18438@debbugs.gnu.org; Thu, 18 Sep 2014 00:59:31 -0400 Original-Received: from webmail.amuri.net (localhost [127.0.0.1]) by goat.amuri.net (Postfix) with ESMTP id E8231FF6D7; Thu, 18 Sep 2014 16:59:34 +1200 (NZST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=amuri.net; s=mail1; t=1411016375; bh=RgD2XutTpHscciJEq/wEqB9wZpfpWjRXMq6g3AUGWXw=; h=MIME-Version:Content-Type:Content-Transfer-Encoding:Date:From:To: Cc:Subject:In-Reply-To:References:Message-ID; b=jNxlI3lC4alGSJKze8zkT2uqa2X7ChZNffGfZu8KYvp8+uw08o+0iIDuXryMj3cX5 siYgDgzz3SNuPWaPUH8lKyHIrsu7m3ut2K2tZgzCCeuug8L2HjRgkk3W7Jc1LrcK1z 0iD+RgIhsUCpaYHLfz9R55H9Pel5RwHd3GvSMWW8= In-Reply-To: <8361gm4yy1.fsf@gnu.org> X-Sender: aidalgol@amuri.net User-Agent: Roundcube Webmail/0.5.3 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:93453 Archived-At: On Wed, 17 Sep 2014 08:07:34 +0300, Eli Zaretskii wrote: > >> Dump of assembler code for function bidi_check_type: >> 0x00000001005010c3 <+0>: push %rbp >> 0x00000001005010c4 <+1>: mov %rsp,%rbp >> 0x00000001005010c7 <+4>: sub $0x20,%rsp >> 0x00000001005010cb <+8>: mov %ecx,0x10(%rbp) >> 0x00000001005010ce <+11>: mov 0x58ab9b(%rip),%rax # >> 0x100a8bc70 <.refptr.suppress_checking> >> 0x00000001005010d5 <+18>: movzbl (%rax),%eax >> 0x00000001005010d8 <+21>: xor $0x1,%eax >> 0x00000001005010db <+24>: test %al,%al >> 0x00000001005010dd <+26>: je 0x1005010ff >> >> 0x00000001005010df <+28>: cmpl $0x17,0x10(%rbp) >> 0x00000001005010e3 <+32>: jbe 0x1005010ff >> >> 0x00000001005010e5 <+34>: mov $0x149,%r8d >> 0x00000001005010eb <+40>: lea 0x5599de(%rip),%rdx # >> 0x100a5aad0 >> 0x00000001005010f2 <+47>: lea 0x5599df(%rip),%rcx # >> 0x100a5aad8 >> 0x00000001005010f9 <+54>: callq 0x1005b9a15 >> => 0x00000001005010fe <+59>: nop >> 0x00000001005010ff <+60>: add $0x20,%rsp >> 0x0000000100501103 <+64>: pop %rbp >> 0x0000000100501104 <+65>: retq >> End of assembler dump. > > My reading of this is: > > . the value being tested is originally in ECX > . it is stored in a temporary local variable at RBP+0x10 > . then it is compared with 0x17 (decimal 23) > > So you have two places to check: the ECX register and the value > pointed to by RBP+0x10. Here we are: (gdb) print $ecx $3 = 6 (gdb) x $rbp+0x10 0x222e10: 0x00000001