Date: 10 Nov 1997 15:39:20 -0000 From: Alan.Judge@indigo.ie To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/4997: DDB_UNATTENDED doesn't always work Message-ID: <19971110153920.370.qmail@relay-mgr.indigo.ie> Resent-Message-ID: <199711101540.HAA06866@hub.freebsd.org>
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>Number: 4997
>Category: kern
>Synopsis: DDB_UNATTENDED doesn't always work
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Nov 10 07:40:00 PST 1997
>Last-Modified:
>Originator: Alan Judge
>Organization:
Indigo, Dublin, Ireland
>Release: FreeBSD 2.2.5-RELEASE i386
>Environment:
Standard 2.2.5 setup with DDB and DDB_UNATTENDED
>Description:
Some types of crash don't call panic and end up in the debugger
anyway.
>How-To-Repeat:
Generate a fatal trap error, such as a page fault in kernel
mode.
>Fix:
I think the following patch should work. It's hard to test easily.
*** i386/i386/trap.c 1997/11/10 15:19:14 1.1
--- i386/i386/trap.c 1997/11/10 15:19:20
***************
*** 665,668 ****
--- 665,671 ----
struct trapframe *frame;
{
+ #ifdef DDB
+ extern int debugger_on_panic;
+ #endif
int code, type, eva, ss, esp;
struct soft_segment_descriptor softseg;
***************
*** 736,740 ****
#endif
#ifdef DDB
! if (kdb_trap (type, 0, frame))
return;
#endif
--- 739,743 ----
#endif
#ifdef DDB
! if (debugger_on_panic && kdb_trap (type, 0, frame))
return;
#endif
*** kern/kern_shutdown.c 1997/11/10 15:15:09 1.1
--- kern/kern_shutdown.c 1997/11/10 15:15:25
***************
*** 77,83 ****
#if defined(DDB)
#ifdef DDB_UNATTENDED
! static int debugger_on_panic = 0;
#else
! static int debugger_on_panic = 1;
#endif
--- 77,83 ----
#if defined(DDB)
#ifdef DDB_UNATTENDED
! int debugger_on_panic = 0;
#else
! int debugger_on_panic = 1;
#endif
>Audit-Trail:
>Unformatted:
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