linux-kernel - [tip:perf/core] perf annotate: Fix storing per line sym_hist

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Message-ID: <tip-s3dm6uyrazlpag3f0psfia07@git.kernel.org>
Date:   Sun, 30 Jul 2017 02:40:27 -0700
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     treeze.taeung@...il.com, wangnan0@...wei.com, acme@...hat.com,
        tglx@...utronix.de, linux-kernel@...r.kernel.org, hpa@...or.com,
        mingo@...nel.org, adrian.hunter@...el.com, namhyung@...nel.org,
        jolsa@...nel.org, dsahern@...il.com
Subject: [tip:perf/core] perf annotate: Fix storing per line sym_hist_entry

Commit-ID:  48cc33085253d607706e68a67ac98fe2a6abdd3d
Gitweb:     http://git.kernel.org/tip/48cc33085253d607706e68a67ac98fe2a6abdd3d
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Fri, 28 Jul 2017 12:49:02 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 28 Jul 2017 12:53:05 -0300

perf annotate: Fix storing per line sym_hist_entry

The existing loop incremented the offset while using it as the array
index, when we went to an array of sym_hist_entry instances, we
should've moved the increment to outside of the array element reference,
oops, fix it.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Taeung Song <treeze.taeung@...il.com>
Cc: Wang Nan <wangnan0@...wei.com>
Fixes: 461c17f00f40 ("perf annotate: Store the sample period in each histogram bucket")
Link: http://lkml.kernel.org/n/tip-s3dm6uyrazlpag3f0psfia07@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 5125c2b..2dab0e5 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -963,8 +963,9 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 		u64 period = 0;
 
 		while (offset < end) {
-			hits += h->addr[offset++].nr_samples;
-			period += h->addr[offset++].period;
+			hits   += h->addr[offset].nr_samples;
+			period += h->addr[offset].period;
+			++offset;
 		}
 
 		if (h->nr_samples) {