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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-03-01 10:21:44 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-03-01 10:21:44 -0300
commit3166fc8fb6a2f52273d545e970297524e02c3e39 (patch)
tree6f3174295ca7df1edad287903e8ef6c4458a1e5f /tools/perf
parentb210b3bb1b002f27165325a5edb6ebce3c168e92 (diff)
downloadop-kernel-dev-3166fc8fb6a2f52273d545e970297524e02c3e39.zip
op-kernel-dev-3166fc8fb6a2f52273d545e970297524e02c3e39.tar.gz
perf top browser: Handle empty active symbols list
Fixing a SEGV. An empty list could happen when not being able to resolve symbols, for instance when --vmlinux invalid-file is used. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/ui/browsers/top.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/util/ui/browsers/top.c b/tools/perf/util/ui/browsers/top.c
index e9381ec..5a06538 100644
--- a/tools/perf/util/ui/browsers/top.c
+++ b/tools/perf/util/ui/browsers/top.c
@@ -76,6 +76,12 @@ static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
browser->root = RB_ROOT;
browser->b.top = NULL;
browser->sum_ksamples = perf_top__decay_samples(top, &browser->root);
+ /*
+ * No active symbols
+ */
+ if (top->rb_entries == 0)
+ return;
+
perf_top__find_widths(top, &browser->root, &browser->dso_width,
&browser->dso_short_width,
&browser->sym_width);
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