--- old/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.cpp	2018-03-20 18:39:38.221262805 -0400
+++ new/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.cpp	2018-03-20 18:39:37.439190226 -0400
@@ -27,6 +27,19 @@
 #include "runtime/frame.hpp"
 #include "runtime/thread.hpp"
 
+frame JavaThread::pd_last_frame() {
+  assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
+
+  intptr_t* sp = last_Java_sp();
+  address pc = _anchor.last_Java_pc();
+
+  // Last_Java_pc ist not set, if we come here from compiled code.
+  if (pc == NULL)
+    pc =  (address) *(sp + 2);
+
+  return frame(sp, pc);
+}
+
 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Aix/PPC.
 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
   Unimplemented();