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| author | Xiangyang Zhang <xyz.sun.ok@gmail.com> | 2022-01-07 18:02:42 +0300 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2022-01-14 01:02:42 +0300 |
| commit | dfea08a2116fe327f79d8f4d4b2cf6e0c88be11f (patch) | |
| tree | ff4ebaced8d0afed249603f665028b4f9b92f141 /kernel/trace | |
| parent | 77360f9bbc7e5e2ab7a2c8b4c0244fbbfcfc6f62 (diff) | |
| download | linux-dfea08a2116fe327f79d8f4d4b2cf6e0c88be11f.tar.xz | |
tracing/kprobes: 'nmissed' not showed correctly for kretprobe
The 'nmissed' column of the 'kprobe_profile' file for kretprobe is
not showed correctly, kretprobe can be skipped by two reasons,
shortage of kretprobe_instance which is counted by tk->rp.nmissed,
and kprobe itself is missed by some reason, so to show the sum.
Link: https://lkml.kernel.org/r/20220107150242.5019-1-xyz.sun.ok@gmail.com
Cc: stable@vger.kernel.org
Fixes: 4a846b443b4e ("tracing/kprobes: Cleanup kprobe tracer code")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Xiangyang Zhang <xyz.sun.ok@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index f8c26ee72de3..3d85323278ed 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1170,15 +1170,18 @@ static int probes_profile_seq_show(struct seq_file *m, void *v) { struct dyn_event *ev = v; struct trace_kprobe *tk; + unsigned long nmissed; if (!is_trace_kprobe(ev)) return 0; tk = to_trace_kprobe(ev); + nmissed = trace_kprobe_is_return(tk) ? + tk->rp.kp.nmissed + tk->rp.nmissed : tk->rp.kp.nmissed; seq_printf(m, " %-44s %15lu %15lu\n", trace_probe_name(&tk->tp), trace_kprobe_nhit(tk), - tk->rp.kp.nmissed); + nmissed); return 0; } |