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perf evlist: Add thread_map__nr() helper

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Introduce and use the thread_map__nr() function to protect a possible
NULL pointer dereference and cleanup the code a bit.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1362987798-24969-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2013-03-11 16:43:14 +09:00
committed by Arnaldo Carvalho de Melo
parent 85397956de
commit b3a319d528
3 changed files with 30 additions and 16 deletions
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4
tools/perf/builtin-stat.c
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@@ -249,7 +249,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
int i;
if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
evsel_list->threads->nr, scale) < 0)
thread_map__nr(evsel_list->threads), scale) < 0)
return -1;
for (i = 0; i < 3; i++)
@@ -488,7 +488,7 @@ static int __run_perf_stat(int argc __maybe_unused, const char **argv)
list_for_each_entry(counter, &evsel_list->entries, node) {
read_counter_aggr(counter);
perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
evsel_list->threads->nr);
thread_map__nr(evsel_list->threads));
}
}