--- a/src/hotspot/share/classfile/javaClasses.hpp	Thu Oct 17 10:35:18 2019 +0200
+++ b/src/hotspot/share/classfile/javaClasses.hpp	Mon Oct 14 11:36:17 2019 +0200
@@ -518,7 +518,8 @@
     trace_mirrors_offset = 2,
     trace_names_offset   = 3,
     trace_next_offset    = 4,
-    trace_size           = 5,
+    trace_hidden_offset  = 5,
+    trace_size           = 6,
     trace_chunk_size     = 32
   };
 
@@ -568,6 +569,8 @@
   static void java_printStackTrace(Handle throwable, TRAPS);
   // Debugging
   friend class JavaClasses;
+  // Gets the method and bci of the top frame (TOS). Returns false if this failed.
+  static bool get_top_method_and_bci(oop throwable, Method** method, int* bci);
 };