NetBSD Problem Report #38873
From dyoung@cuw.ojctech.com Thu Jun 5 22:24:03 2008
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Date: Thu, 5 Jun 2008 17:25:24 -0500 (CDT)
From: dyoung@cuw.ojctech.com
Reply-To: dyoung@cuw.ojctech.com
To: gnats-bugs@gnats.NetBSD.org
Subject: ddb(4) 'next' command is noisy and slow
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>Number: 38873
>Category: kern
>Synopsis: ddb(4) 'next' command is noisy and slow
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Jun 05 22:25:00 +0000 2008
>Originator: David Young
>Release: NetBSD 4.99.64
>Organization:
OJC Technologies
>Environment:
System: NetBSD cuw 4.99.64 NetBSD 4.99.64 (elan) #321: Thu Jun 5 15:13:10 CDT 2008 dyoung@cuw.ojctech.com:/u5/dyoung-scratch/scratch-pm/i386/O/sys/arch/i386/compile/elan i386
Architecture: i386
Machine: i386
>Description:
With recent changes to ddb(4) and/or trap handling, there is a lot of
console noise while the ddb(4) 'next' command runs, for example,
db{0}> next
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247901 cs c0240008 eflags 392 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247903 cs 8 eflags 392 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247904 cs c0240008 eflags 392 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247905 cs c0240008 eflags 392 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247906 cs c0240008 eflags 392 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c0247909 cs c06d0008 eflags 396 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c024790c cs 8 eflags 396 cr2 bbbb3633 ilevel 6
fatal trace trap in supervisor mode
trap type 5 code 0 eip c024790f cs 8 eflags 396 cr2 bbbb3633 ilevel 6
This disrupts the "flow" of a ddb(4) session. It also slows
debugging on a 19200-bps serial console.
>How-To-Repeat:
Break to debugger. Type 'next'.
>Fix:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
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