--- old/src/share/vm/gc_implementation/shenandoah/shenandoahVMOperations.hpp	2019-11-11 16:10:06.401342365 +0100
+++ new/src/share/vm/gc_implementation/shenandoah/shenandoahVMOperations.hpp	2019-11-11 16:10:06.312342370 +0100
@@ -36,6 +36,8 @@
 //       - VM_ShenandoahInitUpdateRefs: initiate update references
 //       - VM_ShenandoahFinalUpdateRefs: finish up update references
 //       - VM_ShenandoahFullGC: do full GC
+//       - VM_ShenandoahInitTraversalGC: init traversal GC
+//       - VM_ShenandoahFinalTraversalGC: finish traversal GC
 
 class VM_ShenandoahOperation : public VM_Operation {
 public:
@@ -99,6 +101,22 @@
   virtual void doit();
 };
 
+class VM_ShenandoahInitTraversalGC: public VM_ShenandoahOperation {
+public:
+  VM_ShenandoahInitTraversalGC() : VM_ShenandoahOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahInitTraversalGC; }
+  const char* name()             const { return "Shenandoah Init Traversal Collection"; }
+  virtual void doit();
+};
+
+class VM_ShenandoahFinalTraversalGC: public VM_ShenandoahReferenceOperation {
+public:
+  VM_ShenandoahFinalTraversalGC() : VM_ShenandoahReferenceOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahFinalTraversalGC; }
+  const char* name()             const { return "Shenandoah Final Traversal Collection"; }
+  virtual void doit();
+};
+
 class VM_ShenandoahInitUpdateRefs: public VM_ShenandoahOperation {
 public:
   VM_ShenandoahInitUpdateRefs() : VM_ShenandoahOperation() {};