diff options
| author | Ian Rogers <irogers@google.com> | 2023-05-15 15:45:30 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-05-16 15:21:30 -0300 |
| commit | 9dde12767aa19696a7fb28b2320119b87fb9d299 (patch) | |
| tree | fc401647c83be44ddcfae0c1f56750ec29799a2b /tools | |
| parent | 760ebc45746b498a36332acefd9e2838a3f8fcf0 (diff) | |
perf metrics: Avoid segv with --topdown for metrics without a group
Some metrics may not have a metric_group which can result in segvs
with "perf stat --topdown". Add a condition for the no metric_group
case.
Fixes: 1647cd5b8802698f ("perf stat: Implement --topdown using json metrics")
Reported-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230515224530.671331-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/metricgroup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 4e7d41d285b4..5e9c657dd3f7 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -1672,7 +1672,7 @@ static int metricgroup__topdown_max_level_callback(const struct pmu_metric *pm, { unsigned int *max_level = data; unsigned int level; - const char *p = strstr(pm->metric_group, "TopdownL"); + const char *p = strstr(pm->metric_group ?: "", "TopdownL"); if (!p || p[8] == '\0') return 0; |