1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index a9df7f2c6dc9..2b7b2d91c016 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -7,6 +7,7 @@
 #include "util.h"
 #include "debug.h"
 #include "comm.h"
+#include "unwind.h"
 
 int thread__init_map_groups(struct thread *thread, struct machine *machine)
 {
@@ -37,6 +38,9 @@ struct thread *thread__new(pid_t pid, pid_t tid)
                 thread->cpu = -1;
                 INIT_LIST_HEAD(&thread->comm_list);
 
+                if (unwind__prepare_access(thread) < 0)
+                        goto err_thread;
+
                 comm_str = malloc(32);
                 if (!comm_str)
                         goto err_thread;
@@ -48,6 +52,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
                         goto err_thread;
 
                 list_add(&comm->list, &thread->comm_list);
+
         }
 
         return thread;
@@ -69,6 +74,7 @@ void thread__delete(struct thread *thread)
                 list_del(&comm->list);
                 comm__free(comm);
         }
+        unwind__finish_access(thread);
 
         free(thread);
 }