diff options
| author | Xiangyang Zhang <xyz.sun.ok@gmail.com> | 2022-01-07 23:02:42 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 09:19:49 +0100 |
| commit | 11604a3a6bed3bfa5be728c0e182c6bc3623b1d8 (patch) | |
| tree | 46730c40ab99a62358e869b7e344bc48722d9870 /kernel/trace | |
| parent | ae2e0b2f2ba3093219da06e42a0cae8eed1ffc96 (diff) | |
tracing/kprobes: 'nmissed' not showed correctly for kretprobe
commit dfea08a2116fe327f79d8f4d4b2cf6e0c88be11f upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 5de084dab4fa..13ccf2f28987 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -999,15 +999,18 @@ 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; } |