diff options
Diffstat (limited to 'tools/perf/util/cpumap.c')
| -rw-r--r-- | tools/perf/util/cpumap.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index 89570397a4b3..a80845038a5e 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -684,16 +684,21 @@ size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size) unsigned char *bitmap; struct perf_cpu c, last_cpu = perf_cpu_map__max(map); - if (buf == NULL) + if (buf == NULL || size == 0) return 0; + if (last_cpu.cpu < 0) { + buf[0] = '\0'; + return 0; + } + bitmap = zalloc(last_cpu.cpu / 8 + 1); if (bitmap == NULL) { buf[0] = '\0'; return 0; } - perf_cpu_map__for_each_cpu(c, idx, map) + perf_cpu_map__for_each_cpu_skip_any(c, idx, map) bitmap[c.cpu / 8] |= 1 << (c.cpu % 8); for (int cpu = last_cpu.cpu / 4 * 4; cpu >= 0; cpu -= 4) { |