[tip:perf/core] perf hists: Fix comparing of dynamic entries

tip-bot for Namhyung Kim
2016-02-27T09:43:39Z

Commit-ID: 84b6ee8ea36ff797afa13c297a86ed0144482bee
Gitweb: http://git.kernel.org/tip/84b6ee8ea36ff797afa13c297a86ed0144482bee
Author: Namhyung Kim <namhyung@kernel.org>
AuthorDate: Sat, 27 Feb 2016 03:52:43 +0900
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 26 Feb 2016 18:35:57 -0300

perf hists: Fix comparing of dynamic entries

When hist_entry__cmp() and hist_entry__collapse() are called, they
should check if the dynamic entry is comparing matching hists only.

Otherwise it might access different hists resulting in incorrect output.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/hist.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 75dc41d..cc849d3 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1002,6 +1002,10 @@ hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
int64_t cmp = 0;

hists__for_each_sort_list(hists, fmt) {
+ if (perf_hpp__is_dynamic_entry(fmt) &&
+ !perf_hpp__defined_dynamic_entry(fmt, hists))
+ continue;
+
cmp = fmt->cmp(fmt, left, right);
if (cmp)
break;
@@ -1018,6 +1022,10 @@ hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
int64_t cmp = 0;

hists__for_each_sort_list(hists, fmt) {
+ if (perf_hpp__is_dynamic_entry(fmt) &&
+ !perf_hpp__defined_dynamic_entry(fmt, hists))
+ continue;
+
cmp = fmt->collapse(fmt, left, right);
if (cmp)
break;