diff --git a/messaging/impl_msgq.cc b/messaging/impl_msgq.cc
index 50ea95c7b..0bb347ba0 100644
--- a/messaging/impl_msgq.cc
+++ b/messaging/impl_msgq.cc
@@ -12,6 +12,7 @@ volatile sig_atomic_t msgq_do_exit = 0;
 void sig_handler(int signal) {
   assert(signal == SIGINT || signal == SIGTERM);
   msgq_do_exit = 1;
+  printf("sig received *************\n");
 }
 
 static bool service_exists(std::string path){
@@ -93,7 +94,9 @@ Message * MSGQSubSocket::receive(bool non_blocking){
   MSGQMessage *r = NULL;
 
   int rc = msgq_msg_recv(&msg, q);
-
+  static std::atomic<int> dd;
+  ++dd;
+  printf("begin recev %d\n", dd.load());
   // Hack to implement blocking read with a poller. Don't use this
   while (!non_blocking && rc == 0 && msgq_do_exit == 0){
     msgq_pollitem_t items[1];
@@ -114,6 +117,8 @@ Message * MSGQSubSocket::receive(bool non_blocking){
     }
   }
 
+  printf("end recev %d\n", dd.load());
+
 
   if (!non_blocking){
     std::signal(SIGINT, prev_handler_sigint);
diff --git a/messaging/msgq.cc b/messaging/msgq.cc
index c3e7265f7..3d6cde5a6 100644
--- a/messaging/msgq.cc
+++ b/messaging/msgq.cc
@@ -78,8 +78,10 @@ SharedMemory::SharedMemory(const std::string &name, size_t size) :shm_name(name)
 }
 
 SharedMemory::~SharedMemory() {
+  printf("before ~SharedMemory\n");
   munmap(shm_ptr, shm_size);
   ::close(shm_fd);
+  printf("end ~SharedMemory\n");
 }
 
 void SharedMemory::notifyAll() {
@@ -89,7 +91,13 @@ void SharedMemory::notifyAll() {
 }
 
 void SharedMemory::waitFor(const struct timespec *abstime) {
-
+  static std::atomic<int> d = 0;
+  ++d;
+  printf("before wait for %d\n", d.load());
+  pthread_mutex_lock(&(header->mutex));
+  pthread_cond_timedwait(&(header->cond), &(header->mutex), abstime);
+  pthread_mutex_unlock(&(header->mutex));
+  printf("end wait for %d\n", d.load());
 }
 
 msgq_context::msgq_context() : shm("msgq_poll", 0) {
@@ -178,7 +186,9 @@ int msgq_new_queue(msgq_queue_t * q, const char * path, size_t size){
 }
 
 void msgq_close_queue(msgq_queue_t *q){
+  printf("close queue...\n");
   delete q->shm;
+  printf("close queue finished\n");
 }
 
 void msgq_init_publisher(msgq_queue_t * q) {
diff --git a/messaging/msgq.h b/messaging/msgq.h
index e676c4035..75f8624bf 100644
--- a/messaging/msgq.h
+++ b/messaging/msgq.h
@@ -36,6 +36,7 @@ class SharedMemory {
 
 struct msgq_context {
   msgq_context();
+  ~msgq_context() {printf("msgq_context closed*************\n");}
   SharedMemory shm;
   SharedMemoryHeader *ctx;
 };