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Re: [PATCH -tip 1/8] tracing/kprobe: Update example output in documentation
- From: Steven Rostedt <rostedt at goodmis dot org>
- To: Masami Hiramatsu <mhiramat at redhat dot com>
- Cc: Ingo Molnar <mingo at elte dot hu>, lkml <linux-kernel at vger dot kernel dot org>, Frederic Weisbecker <fweisbec at gmail dot com>, Arnaldo Carvalho de Melo <acme at redhat dot com>, systemtap <systemtap at sources dot redhat dot com>, DLE <dle-develop at lists dot sourceforge dot net>
- Date: Wed, 06 Jan 2010 13:40:11 -0500
- Subject: Re: [PATCH -tip 1/8] tracing/kprobe: Update example output in documentation
- References: <20100105224634.19431.3259.stgit@dhcp-100-2-132.bos.redhat.com> <20100105224641.19431.34967.stgit@dhcp-100-2-132.bos.redhat.com>
- Reply-to: rostedt at goodmis dot org
On Tue, 2010-01-05 at 17:46 -0500, Masami Hiramatsu wrote:
> Update example output in documentation accroding to current
> implementation.
>
> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
-- Steve
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> ---
>
> Documentation/trace/kprobetrace.txt | 33 +++++++++++++++++----------------
> 1 files changed, 17 insertions(+), 16 deletions(-)
>
> diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt
> index 47aabee..c3eff6f 100644
> --- a/Documentation/trace/kprobetrace.txt
> +++ b/Documentation/trace/kprobetrace.txt
> @@ -97,23 +97,24 @@ recording return value as "myretprobe" event.
>
> cat /sys/kernel/debug/tracing/events/kprobes/myprobe/format
> name: myprobe
> -ID: 75
> +ID: 780
> format:
> - field:unsigned short common_type; offset:0; size:2;
> - field:unsigned char common_flags; offset:2; size:1;
> - field:unsigned char common_preempt_count; offset:3; size:1;
> - field:int common_pid; offset:4; size:4;
> - field:int common_tgid; offset:8; size:4;
> -
> - field: unsigned long ip; offset:16;tsize:8;
> - field: int nargs; offset:24;tsize:4;
> - field: unsigned long dfd; offset:32;tsize:8;
> - field: unsigned long filename; offset:40;tsize:8;
> - field: unsigned long flags; offset:48;tsize:8;
> - field: unsigned long mode; offset:56;tsize:8;
> -
> -print fmt: "(%lx) dfd=%lx filename=%lx flags=%lx mode=%lx", REC->ip, REC->dfd, REC->filename, REC->flags, REC->mode
> -
> + field:unsigned short common_type; offset:0; size:2; signed:0;
> + field:unsigned char common_flags; offset:2; size:1; signed:0;
> + field:unsigned char common_preempt_count; offset:3; size:1;signed:0;
> + field:int common_pid; offset:4; size:4; signed:1;
> + field:int common_lock_depth; offset:8; size:4; signed:1;
> +
> + field:unsigned long __probe_ip; offset:12; size:4; signed:0;
> + field:int __probe_nargs; offset:16; size:4; signed:1;
> + field:unsigned long dfd; offset:20; size:4; signed:0;
> + field:unsigned long filename; offset:24; size:4; signed:0;
> + field:unsigned long flags; offset:28; size:4; signed:0;
> + field:unsigned long mode; offset:32; size:4; signed:0;
> +
> +
> +print fmt: "(%lx) dfd=%lx filename=%lx flags=%lx mode=%lx", REC->__probe_ip,
> +REC->dfd, REC->filename, REC->flags, REC->mode
>
> You can see that the event has 4 arguments as in the expressions you specified.
>
>
>