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tracing/kprobe: Update example output in documentation 

Update example output in documentation according to current
implementation.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20100105224641.19431.34967.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Masami Hiramatsu 2010-01-05 17:46:41 -05:00 committed by Ingo Molnar
parent 56b03f3c4d
commit ec3a903960
1 changed files with 14 additions and 13 deletions
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27
Documentation/trace/kprobetrace.txt
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@ -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 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 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;
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->ip, REC->dfd, REC->filename, REC->flags, REC->mode
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.