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/map.c b/tools/perf/util/map.c
index 2ddbae319de5..15d6a6dd50c5 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -539,6 +539,32 @@ int machine__init(struct machine *self, const char *root_dir, pid_t pid)
         return self->root_dir == NULL ? -ENOMEM : 0;
 }
 
+static void dsos__delete(struct list_head *self)
+{
+        struct dso *pos, *n;
+
+        list_for_each_entry_safe(pos, n, self, node) {
+                list_del(&pos->node);
+                dso__delete(pos);
+        }
+}
+
+void machine__exit(struct machine *self)
+{
+        struct kmap *kmap = map__kmap(self->vmlinux_maps[MAP__FUNCTION]);
+
+        if (kmap->ref_reloc_sym) {
+                free((char *)kmap->ref_reloc_sym->name);
+                free(kmap->ref_reloc_sym);
+        }
+
+        map_groups__exit(&self->kmaps);
+        dsos__delete(&self->user_dsos);
+        dsos__delete(&self->kernel_dsos);
+        free(self->root_dir);
+        self->root_dir = NULL;
+}
+
 struct machine *machines__add(struct rb_root *self, pid_t pid,
                               const char *root_dir)
 {