diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-06-20 00:07:49 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-08-31 12:19:38 -0400 |
| commit | ca89bc071d5e4e981dcc52e0ca90f4500d332e42 (patch) | |
| tree | a54787d9b315c337d1a7d5740db43e6a503c65ab /kernel/trace/trace.c | |
| parent | 30199137c899d7e416a2adc58bf09bec217ce9ca (diff) | |
| download | lwn-ca89bc071d5e4e981dcc52e0ca90f4500d332e42.tar.gz lwn-ca89bc071d5e4e981dcc52e0ca90f4500d332e42.zip | |
tracing/kprobe: Add multi-probe per event support
Add multi-probe per one event support to kprobe events.
User can define several different probes on one trace event
if those events have same "event signature",
e.g.
# echo p:testevent _do_fork > kprobe_events
# echo p:testevent fork_idle >> kprobe_events
# kprobe_events
p:kprobes/testevent _do_fork
p:kprobes/testevent fork_idle
The event signature is defined by kprobe type (retprobe or not),
the number of args, argument names, and argument types.
Note that this only support appending method. Delete event
operation will delete all probes on the event.
Link: http://lkml.kernel.org/r/156095686913.28024.9357292202316540742.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 563e80f9006a..a8505d84b76e 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4815,11 +4815,11 @@ static const char readme_msg[] = #endif #endif /* CONFIG_STACK_TRACER */ #ifdef CONFIG_DYNAMIC_EVENTS - " dynamic_events\t\t- Add/remove/show the generic dynamic events\n" + " dynamic_events\t\t- Create/append/remove/show the generic dynamic events\n" "\t\t\t Write into this file to define/undefine new trace events.\n" #endif #ifdef CONFIG_KPROBE_EVENTS - " kprobe_events\t\t- Add/remove/show the kernel dynamic events\n" + " kprobe_events\t\t- Create/append/remove/show the kernel dynamic events\n" "\t\t\t Write into this file to define/undefine new trace events.\n" #endif #ifdef CONFIG_UPROBE_EVENTS |