Date: Thu, 13 Mar 2003 14:00:22 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org, cvs-src@FreeBSD.org, src-committers@FreeBSD.org Subject: RE: cvs commit: src/usr.bin/kdump kdump.c Message-ID: <XFMail.20030313140022.jhb@FreeBSD.org> In-Reply-To: <200303131846.h2DIkaAU076722@repoman.freebsd.org>
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On 13-Mar-2003 John Baldwin wrote:
> jhb 2003/03/13 10:46:35 PST
>
> FreeBSD src repository
>
> Modified files:
> usr.bin/kdump kdump.c
> Log:
> Teach kdump(8) to handle events marked with KTR_DROP. If a record has
> KTR_DROP set in its header, then we output an extra line to stdout to
> indicate that events were dropped between the previous record and this
> record. It is a bit trickier because we need to always notify the user
> if events are dropped even if KTR_DROP is set on a record of a type that
> we aren't interested in since kdump(8) doesn't know if the dropped events
> were of the types that the user has requested. To avoid outputting
> multiple events dropped notices in between actual event logs, a state
> variable is set whenever a drop is logged and cleared whenever an actual
> record is output.
>
> Requested by: phk
Sample output looks like this:
> sudo sysctl
kern.ktrace.request_pool=5
kern.ktrace.request_pool: 5 -> 5
> ktrace sh -c "echo foo bar baz; sleep 1; echo more"
foo bar baz
more
> kdump.old
723 ktrace RET ktrace 0
723 ktrace CALL execve(0xbfbff300,0xbfbff7f4,0xbfbff804)
723 ktrace NAMI "/sbin/sh"
723 ktrace RET execve -1 errno 2 No such file or directory
723 ktrace CALL execve(0xbfbff300,0xbfbff7f4,0xbfbff804)
723 ktrace NAMI "/bin/sh"
723 sh UNKNOWN(-32767) 723 sh UNKNOWN(-32767) 723 sh UNKNOWN(-32766)
723 sh CALL break(0x8101000)
723 sh RET break 0
723 sh CALL write(0x1,0x8100000,0x5)
723 sh GIO fd 1 wrote 5 bytes
"more
"
> kdump
723 ktrace RET ktrace 0
723 ktrace CALL execve(0xbfbff300,0xbfbff7f4,0xbfbff804)
723 ktrace NAMI "/sbin/sh"
723 ktrace RET execve -1 errno 2 No such file or directory
723 ktrace CALL execve(0xbfbff300,0xbfbff7f4,0xbfbff804)
723 ktrace NAMI "/bin/sh"
723 sh Events dropped.
723 sh CALL break(0x80fe000)
723 sh Events dropped.
723 sh CALL getpgrp
723 sh Events dropped.
723 sh RET wait4 724/0x2d4
723 sh CALL break(0x8101000)
723 sh RET break 0
723 sh CALL write(0x1,0x8100000,0x5)
723 sh GIO fd 1 wrote 5 bytes
"more
"
Hmm, from this it is apparent that kdump is missing a newline in the
UNKNOWN case. I'll fix that shortly.
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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