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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-09-18 10:55:46 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-09-19 17:09:16 +0200 |
| commit | fe60b0ce8e7335269722ec080173a9411a9d58a5 (patch) | |
| tree | eb5e1017f436280c01a4d0ef65710437bfaa6d88 /kernel/trace/trace_probe.h | |
| parent | tracing/probe: Fix to allow user to enable events on unloaded modules (diff) | |
| download | linux-fe60b0ce8e7335269722ec080173a9411a9d58a5.tar.xz linux-fe60b0ce8e7335269722ec080173a9411a9d58a5.zip | |
tracing/probe: Reject exactly same probe event
Reject exactly same probe events as existing probes.
Multiprobe allows user to define multiple probes on same
event. If user appends a probe which exactly same definition
(same probe address and same arguments) on existing event,
the event will record same probe information twice.
That can be confusing users, so reject it.
Link: http://lkml.kernel.org/r/156879694602.31056.5533024778165036763.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_probe.h')
| -rw-r--r-- | kernel/trace/trace_probe.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index f805cc4cbe7c..4ee703728aec 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -436,7 +436,8 @@ extern int traceprobe_define_arg_fields(struct trace_event_call *event_call, C(BAD_INSN_BNDRY, "Probe point is not an instruction boundary"),\ C(FAIL_REG_PROBE, "Failed to register probe event"),\ C(DIFF_PROBE_TYPE, "Probe type is different from existing probe"),\ - C(DIFF_ARG_TYPE, "Argument type or name is different from existing probe"), + C(DIFF_ARG_TYPE, "Argument type or name is different from existing probe"),\ + C(SAME_PROBE, "There is already the exact same probe event"), #undef C #define C(a, b) TP_ERR_##a |