[PATCH v3 33/48] libperf: Allow NULL in perf_cpu_map__idx
From: Ian Rogers <irogers@google.com>
Date: 2021-12-30 07:22:47
Also in:
linux-perf-users, lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Return -1, not found, if NULL is passed. Signed-off-by: Ian Rogers <irogers@google.com> --- tools/lib/perf/cpumap.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c
index 3c36a06771af..eacea3ab965a 100644
--- a/tools/lib/perf/cpumap.c
+++ b/tools/lib/perf/cpumap.c@@ -270,8 +270,13 @@ bool perf_cpu_map__empty(const struct perf_cpu_map *map) int perf_cpu_map__idx(const struct perf_cpu_map *cpus, int cpu) { - int low = 0, high = cpus->nr; + int low, high; + if (!cpus) + return -1; + + low = 0; + high = cpus->nr; while (low < high) { int idx = (low + high) / 2, cpu_at_idx = cpus->map[idx];
--
2.34.1.448.ga2b2bfdf31-goog
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