diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-04-23 20:01:22 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-20 10:24:22 +0200 |
| commit | a1d8696eff0619f2a36adbc62260fa8330a0f165 (patch) | |
| tree | 0e94142bacd7ae9caba91595b4f8447a1ec39373 /tools | |
| parent | 05f3752fd72a975f5568db0631cb102b9a9f5dde (diff) | |
perf probe: Do not show the skipped events
commit f41ebe9defacddeae96a872a33f0f22ced0bfcef upstream.
When a probe point is expanded to several places (like inlined) and if
some of them are skipped because of blacklisted or __init function,
those trace_events has no event name. It must be skipped while showing
results.
Without this fix, you can see "(null):(null)" on the list,
# ./perf probe request_resource
reserve_setup is out of .text, skip it.
Added new events:
(null):(null) (on request_resource)
probe:request_resource (on request_resource)
You can now use it in all perf tools, such as:
perf record -e probe:request_resource -aR sleep 1
#
With this fix, it is ignored:
# ./perf probe request_resource
reserve_setup is out of .text, skip it.
Added new events:
probe:request_resource (on request_resource)
You can now use it in all perf tools, such as:
perf record -e probe:request_resource -aR sleep 1
#
Fixes: 5a51fcd1f30c ("perf probe: Skip kernel symbols which is out of .text")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/158763968263.30755.12800484151476026340.stgit@devnote2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-probe.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 2b420e7a92c0..929f0d0ea9da 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -344,6 +344,9 @@ static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs) for (k = 0; k < pev->ntevs; k++) { struct probe_trace_event *tev = &pev->tevs[k]; + /* Skipped events have no event name */ + if (!tev->event) + continue; /* We use tev's name for showing new events */ show_perf_probe_event(tev->group, tev->event, pev, |