--- a/src/hotspot/os_cpu/linux_zero/thread_linux_zero.cpp	Wed Mar 21 17:09:34 2018 -0400
+++ b/src/hotspot/os_cpu/linux_zero/thread_linux_zero.cpp	Wed Mar 21 19:45:24 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2009, 2010 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -27,6 +27,11 @@
 #include "runtime/frame.inline.hpp"
 #include "runtime/thread.inline.hpp"
 
+frame JavaThread::pd_last_frame() {
+  assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
+  return frame(last_Java_fp(), last_Java_sp());
+}
+
 void JavaThread::cache_global_variables() {
   // nothing to do
 }