--- a/src/hotspot/os_cpu/bsd_x86/thread_bsd_x86.cpp	Wed Mar 21 17:09:34 2018 -0400
+++ b/src/hotspot/os_cpu/bsd_x86/thread_bsd_x86.cpp	Wed Mar 21 19:45:24 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,12 @@
 #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");
+  vmassert(_anchor.last_Java_pc() != NULL, "not walkable");
+  return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());
+}
+
 // For Forte Analyzer AsyncGetCallTrace profiling support - thread is
 // currently interrupted by SIGPROF
 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr,