linux-kernel - [tip:perf/urgent] perf map: Remove map from 'names' tree in __maps_

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Date:   Fri, 22 Mar 2019 15:30:40 -0700
From:   tip-bot for Changbin Du <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jolsa@...nel.org, changbin.du@...il.com, namhyung@...nel.org,
        peterz@...radead.org, tglx@...utronix.de, mingo@...nel.org,
        rostedt@...dmis.org, daniel@...earbox.net, ast@...nel.org,
        linux-kernel@...r.kernel.org, acme@...hat.com,
        eric.saint.etienne@...cle.com, hpa@...or.com
Subject: [tip:perf/urgent] perf map: Remove map from 'names' tree in
 __maps__remove()

Commit-ID:  b49265e04410b97b31a5ee66ef6782c1b2d6cd2c
Gitweb:     https://git.kernel.org/tip/b49265e04410b97b31a5ee66ef6782c1b2d6cd2c
Author:     Changbin Du <changbin.du@...il.com>
AuthorDate: Sat, 16 Mar 2019 16:05:50 +0800
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 19 Mar 2019 16:52:05 -0300

perf map: Remove map from 'names' tree in __maps__remove()

There are two trees for each map inserted by maps__insert(), so remove
it from the 'names' tree in __maps__remove().

Detected with gcc's ASan.

Signed-off-by: Changbin Du <changbin.du@...il.com>
Reviewed-by: Jiri Olsa <jolsa@...nel.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: Eric Saint-Etienne <eric.saint.etienne@...cle.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt (VMware) <rostedt@...dmis.org>
Fixes: 1e6285699b30 ("perf symbols: Fix slowness due to -ffunction-section")
Link: http://lkml.kernel.org/r/20190316080556.3075-11-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/map.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index fbeb0c6efaa6..64bea5eb8bf6 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -917,6 +917,9 @@ static void __maps__remove(struct maps *maps, struct map *map)
 {
 	rb_erase_init(&map->rb_node, &maps->entries);
 	map__put(map);
+
+	rb_erase_init(&map->rb_node_name, &maps->names);
+	map__put(map);
 }
 
 void maps__remove(struct maps *maps, struct map *map)