perf callchain: Free callchains when hist entries are deleted
Markus reported that "perf top -g" can leak ~300MB per second on his
machine. This is partly because it missed to free callchains when hist
entries are deleted. Fix it.
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20141230053813.GD6081@sejong
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 64b377e..14e7a12 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -841,3 +841,33 @@
return bf;
}
+
+static void free_callchain_node(struct callchain_node *node)
+{
+ struct callchain_list *list, *tmp;
+ struct callchain_node *child;
+ struct rb_node *n;
+
+ list_for_each_entry_safe(list, tmp, &node->val, list) {
+ list_del(&list->list);
+ free(list);
+ }
+
+ n = rb_first(&node->rb_root_in);
+ while (n) {
+ child = container_of(n, struct callchain_node, rb_node_in);
+ n = rb_next(n);
+ rb_erase(&child->rb_node_in, &node->rb_root_in);
+
+ free_callchain_node(child);
+ free(child);
+ }
+}
+
+void free_callchain(struct callchain_root *root)
+{
+ if (!symbol_conf.use_callchain)
+ return;
+
+ free_callchain_node(&root->node);
+}