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

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Date:	Sat, 27 Feb 2016 01:43:01 -0800
From:	tip-bot for Namhyung Kim <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	eranian@...gle.com, tglx@...utronix.de, hpa@...or.com,
	dsahern@...il.com, jolsa@...nel.org, mingo@...nel.org,
	namhyung@...nel.org, linux-kernel@...r.kernel.org,
	andi@...stfloor.org, acme@...hat.com, wangnan0@...wei.com,
	peterz@...radead.org
Subject: [tip:perf/core] perf hists: Fix comparing of dynamic entries

Commit-ID:  84b6ee8ea36ff797afa13c297a86ed0144482bee
Gitweb:     http://git.kernel.org/tip/84b6ee8ea36ff797afa13c297a86ed0144482bee
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Sat, 27 Feb 2016 03:52:43 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.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@...nel.org>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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;