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perf.16341
perf-probe-do-not-show-the-skipped-events.patch
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File perf-probe-do-not-show-the-skipped-events.patch of Package perf.16341
From: Masami Hiramatsu <mhiramat@kernel.org> Date: Thu, 23 Apr 2020 20:01:22 +0900 Subject: perf probe: Do not show the skipped events Git-commit: f41ebe9defacddeae96a872a33f0f22ced0bfcef References: git-fixes 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> Acked-by: Tony Jones <tonyj@suse.de> --- tools/perf/builtin-probe.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 70548df2abb9..6b1507566770 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -364,6 +364,9 @@ 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,
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