1 files changed, 23 insertions, 0 deletions

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 39cd2d0faff6..ba5f5c0c838b 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -323,6 +323,7 @@ void map_groups__init(struct map_groups *mg)
                 INIT_LIST_HEAD(&mg->removed_maps[i]);
         }
         mg->machine = NULL;
+        mg->refcnt = 1;
 }
 
 static void maps__delete(struct rb_root *maps)
@@ -358,6 +359,28 @@ void map_groups__exit(struct map_groups *mg)
         }
 }
 
+struct map_groups *map_groups__new(void)
+{
+        struct map_groups *mg = malloc(sizeof(*mg));
+
+        if (mg != NULL)
+                map_groups__init(mg);
+
+        return mg;
+}
+
+void map_groups__delete(struct map_groups *mg)
+{
+        map_groups__exit(mg);
+        free(mg);
+}
+
+void map_groups__put(struct map_groups *mg)
+{
+        if (--mg->refcnt == 0)
+                map_groups__delete(mg);
+}
+
 void map_groups__flush(struct map_groups *mg)
 {
         int type;