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| author | Motohiro KOSAKI <kosaki.motohiro@jp.fujitsu.com> | 2010-01-18 21:35:05 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-01-20 07:18:14 +0100 |
| commit | 580d9e00fdfb85e65c5097dcd739c6efcdbadc96 (patch) | |
| tree | 2e3e561c345455a15e79332614cf6b38dd9dd77f /Documentation/trace | |
| parent | f426a7e02918e2e992b28adeb02e5a0ab39a7a25 (diff) | |
| download | lwn-580d9e00fdfb85e65c5097dcd739c6efcdbadc96.tar.gz lwn-580d9e00fdfb85e65c5097dcd739c6efcdbadc96.zip | |
kprobetrace, doc: Shell needs single quote to use $ character
Shell interprets $val as shell variable, thus we need quote if
we use the echo command.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20100119023505.31880.17367.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/kprobetrace.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt index f30978e001f8..ab57f02e53bb 100644 --- a/Documentation/trace/kprobetrace.txt +++ b/Documentation/trace/kprobetrace.txt @@ -79,7 +79,7 @@ Usage examples To add a probe as a new event, write a new definition to kprobe_events as below. - echo p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack) > /sys/kernel/debug/tracing/kprobe_events + echo 'p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack)' > /sys/kernel/debug/tracing/kprobe_events This sets a kprobe on the top of do_sys_open() function with recording 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 under tools/perf/). As this example shows, users can choose more familiar names for each arguments. - echo r:myretprobe do_sys_open $retval >> /sys/kernel/debug/tracing/kprobe_events + echo 'r:myretprobe do_sys_open $retval' >> /sys/kernel/debug/tracing/kprobe_events This sets a kretprobe on the return point of do_sys_open() function with recording return value as "myretprobe" event. |