perf diff: Add missing hists__init() call at tool start
It also uses hists/hist_entries, hists__init() should be called before
creating any evsels.
Otherwise no extra space will be allocated per perf_evsel nor this space
will be initialized when allocating a new perf_evsel instance, resulting
in reads/writes to non allocated space, oops. Fix it.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Link: http://lkml.kernel.org/r/1414004561-22096-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 8c5c11c..25114c9 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1142,6 +1142,11 @@
int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
{
+ int ret = hists__init();
+
+ if (ret < 0)
+ return ret;
+
perf_config(perf_default_config, NULL);
argc = parse_options(argc, argv, options, diff_usage, 0);