--- old/src/hotspot/os_cpu/linux_aarch64/thread_linux_aarch64.cpp	2018-03-20 18:39:43.172722311 -0400
+++ new/src/hotspot/os_cpu/linux_aarch64/thread_linux_aarch64.cpp	2018-03-20 18:39:42.484658458 -0400
@@ -28,6 +28,11 @@
 #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(_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,