diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-11-05 10:02:36 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-09 02:54:09 +0100 |
| commit | 6212dd29683eec51d6d05374a66ac953e81250e9 (patch) | |
| tree | 099400e1f64361a289f154d55c63e7c8d9db2ba6 /kernel/trace/trace_probe.c | |
| parent | tracing: Add unified dynamic event framework (diff) | |
| download | linux-6212dd29683eec51d6d05374a66ac953e81250e9.tar.xz linux-6212dd29683eec51d6d05374a66ac953e81250e9.zip | |
tracing/kprobes: Use dyn_event framework for kprobe events
Use dyn_event framework for kprobe events. This shows
kprobe events on "tracing/dynamic_events" file.
User can also define new events via tracing/dynamic_events.
Link: http://lkml.kernel.org/r/154140855646.17322.6619219995865980392.stgit@devbox
Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_probe.c')
| -rw-r--r-- | kernel/trace/trace_probe.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 449150c6a87f..ff86417c0149 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -154,6 +154,33 @@ int traceprobe_split_symbol_offset(char *symbol, long *offset) return 0; } +/* @buf must has MAX_EVENT_NAME_LEN size */ +int traceprobe_parse_event_name(const char **pevent, const char **pgroup, + char *buf) +{ + const char *slash, *event = *pevent; + + slash = strchr(event, '/'); + if (slash) { + if (slash == event) { + pr_info("Group name is not specified\n"); + return -EINVAL; + } + if (slash - event + 1 > MAX_EVENT_NAME_LEN) { + pr_info("Group name is too long\n"); + return -E2BIG; + } + strlcpy(buf, event, slash - event + 1); + *pgroup = buf; + *pevent = slash + 1; + } + if (strlen(event) == 0) { + pr_info("Event name is not specified\n"); + return -EINVAL; + } + return 0; +} + #define PARAM_MAX_STACK (THREAD_SIZE / sizeof(unsigned long)) static int parse_probe_vars(char *arg, const struct fetch_type *t, |