diff options
| author | Linyu Yuan <quic_linyyuan@quicinc.com> | 2022-06-27 10:19:07 +0800 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-07-24 19:11:17 -0400 |
| commit | 95c104c378dc7d4cb3fb9f289dc5354bfc285fe0 (patch) | |
| tree | 0d2657d250a3e22ab08e4250f34db9adc2d50650 /kernel/trace/trace_probe.c | |
| parent | f360ea5641dc9473ad485e882c8ac3b1aa2672ff (diff) | |
| download | linux-95c104c378dc7d4cb3fb9f289dc5354bfc285fe0.tar.gz linux-95c104c378dc7d4cb3fb9f289dc5354bfc285fe0.tar.bz2 linux-95c104c378dc7d4cb3fb9f289dc5354bfc285fe0.zip | |
tracing: Auto generate event name when creating a group of events
Currently when creating a specific group of trace events,
take kprobe event as example, the user must use the following format:
p:GRP/EVENT [MOD:]KSYM[+OFFS]|KADDR [FETCHARGS],
which means user must enter EVENT name, one example is:
echo 'p:usb_gadget/config_usb_cfg_link config_usb_cfg_link $arg1' >> kprobe_events
It is not simple if there are too many entries because the event name is
the same as symbol name.
This change allows user to specify no EVENT name, format changed as:
p:GRP/ [MOD:]KSYM[+OFFS]|KADDR [FETCHARGS]
It will generate event name automatically and one example is:
echo 'p:usb_gadget/ config_usb_cfg_link $arg1' >> kprobe_events.
Link: https://lore.kernel.org/all/1656296348-16111-4-git-send-email-quic_linyyuan@quicinc.com/
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_probe.c')
| -rw-r--r-- | kernel/trace/trace_probe.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 80863c6508e5..850a88abd33b 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -257,6 +257,10 @@ int traceprobe_parse_event_name(const char **pevent, const char **pgroup, } len = strlen(event); if (len == 0) { + if (slash) { + *pevent = NULL; + return 0; + } trace_probe_log_err(offset, NO_EVENT_NAME); return -EINVAL; } else if (len > MAX_EVENT_NAME_LEN) { |