diff options
| author | Motohiro KOSAKI <kosaki.motohiro@jp.fujitsu.com> | 2010-01-18 21:35:05 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-01-20 01:18:14 -0500 |
| commit | 580d9e00fdfb85e65c5097dcd739c6efcdbadc96 (patch) | |
| tree | 2e3e561c345455a15e79332614cf6b38dd9dd77f /Documentation/trace | |
| parent | f426a7e02918e2e992b28adeb02e5a0ab39a7a25 (diff) | |
kprobetrace, doc: Shell needs single quote to use $ character
Shell interprets $val as shell variable, thus we need quote if
we use the echo command.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20100119023505.31880.17367.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/kprobetrace.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt index f30978e001f8..ab57f02e53bb 100644 --- a/Documentation/trace/kprobetrace.txt +++ b/Documentation/trace/kprobetrace.txt | |||
| @@ -79,7 +79,7 @@ Usage examples | |||
| 79 | To add a probe as a new event, write a new definition to kprobe_events | 79 | To add a probe as a new event, write a new definition to kprobe_events |
| 80 | as below. | 80 | as below. |
| 81 | 81 | ||
| 82 | echo p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack) > /sys/kernel/debug/tracing/kprobe_events | 82 | echo 'p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack)' > /sys/kernel/debug/tracing/kprobe_events |
| 83 | 83 | ||
| 84 | This sets a kprobe on the top of do_sys_open() function with recording | 84 | This sets a kprobe on the top of do_sys_open() function with recording |
| 85 | 1st to 4th arguments as "myprobe" event. Note, which register/stack entry is | 85 | 1st to 4th arguments as "myprobe" event. Note, which register/stack entry is |
| @@ -88,7 +88,7 @@ the ABI, please try to use probe subcommand of perf-tools (you can find it | |||
| 88 | under tools/perf/). | 88 | under tools/perf/). |
| 89 | As this example shows, users can choose more familiar names for each arguments. | 89 | As this example shows, users can choose more familiar names for each arguments. |
| 90 | 90 | ||
| 91 | echo r:myretprobe do_sys_open $retval >> /sys/kernel/debug/tracing/kprobe_events | 91 | echo 'r:myretprobe do_sys_open $retval' >> /sys/kernel/debug/tracing/kprobe_events |
| 92 | 92 | ||
| 93 | This sets a kretprobe on the return point of do_sys_open() function with | 93 | This sets a kretprobe on the return point of do_sys_open() function with |
| 94 | recording return value as "myretprobe" event. | 94 | recording return value as "myretprobe" event. |