perf tools: Release session and symbol resources on exit

So that we reduce the noise when looking for leaks using tools such as
valgrind.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 8cbea122e349..04a3b3db9e90 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -124,9 +124,35 @@ out_delete:
         return NULL;
 }
 
+static void perf_session__delete_dead_threads(struct perf_session *self)
+{
+        struct thread *n, *t;
+
+        list_for_each_entry_safe(t, n, &self->dead_threads, node) {
+                list_del(&t->node);
+                thread__delete(t);
+        }
+}
+
+static void perf_session__delete_threads(struct perf_session *self)
+{
+        struct rb_node *nd = rb_first(&self->threads);
+
+        while (nd) {
+                struct thread *t = rb_entry(nd, struct thread, rb_node);
+
+                rb_erase(&t->rb_node, &self->threads);
+                nd = rb_next(nd);
+                thread__delete(t);
+        }
+}
+
 void perf_session__delete(struct perf_session *self)
 {
         perf_header__exit(&self->header);
+        perf_session__delete_dead_threads(self);
+        perf_session__delete_threads(self);
+        machine__exit(&self->host_machine);
         close(self->fd);
         free(self);
 }