--- /dev/null	2018-11-30 10:10:44.238550338 +0100
+++ new/src/hotspot/share/gc/shenandoah/vm_operations_shenandoah.hpp	2018-11-30 21:08:25.220219613 +0100
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2013, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_SHENANDOAH_VM_OPERATIONS_SHENANDOAH_HPP
+#define SHARE_VM_GC_SHENANDOAH_VM_OPERATIONS_SHENANDOAH_HPP
+
+#include "gc/shared/vmGCOperations.hpp"
+
+// VM_operations for the Shenandoah Collector.
+//
+// VM_ShenandoahOperation
+//   - VM_ShenandoahInitMark: initiate concurrent marking
+//   - VM_ShenandoahReferenceOperation:
+//       - VM_ShenandoahFinalMarkStartEvac: finish up concurrent marking, and start evacuation
+//       - VM_ShenandoahFinalEvac: finish concurrent evacuation
+//       - 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 {
+protected:
+  uint         _gc_id;
+public:
+  VM_ShenandoahOperation() : _gc_id(GCId::current()) {};
+};
+
+class VM_ShenandoahReferenceOperation : public VM_ShenandoahOperation {
+public:
+  VM_ShenandoahReferenceOperation() : VM_ShenandoahOperation() {};
+  bool doit_prologue();
+  void doit_epilogue();
+};
+
+class VM_ShenandoahInitMark: public VM_ShenandoahOperation {
+public:
+  VM_ShenandoahInitMark() : VM_ShenandoahOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahInitMark; }
+  const char* name()             const { return "Shenandoah Init Marking"; }
+  virtual void doit();
+};
+
+class VM_ShenandoahFinalMarkStartEvac: public VM_ShenandoahReferenceOperation {
+public:
+  VM_ShenandoahFinalMarkStartEvac() : VM_ShenandoahReferenceOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahFinalMarkStartEvac; }
+  const char* name()             const { return "Shenandoah Final Mark and Start Evacuation"; }
+  virtual  void doit();
+};
+
+class VM_ShenandoahFinalEvac: public VM_ShenandoahOperation {
+public:
+  VM_ShenandoahFinalEvac() : VM_ShenandoahOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahFinalEvac; }
+  const char* name()             const { return "Shenandoah Final Evacuation"; }
+  virtual  void doit();
+};
+
+class VM_ShenandoahDegeneratedGC: public VM_ShenandoahReferenceOperation {
+private:
+  // Really the ShenandoahHeap::ShenandoahDegenerationPoint, but casted to int here
+  // in order to avoid dependency on ShenandoahHeap
+  int _point;
+public:
+  VM_ShenandoahDegeneratedGC(int point) : VM_ShenandoahReferenceOperation(), _point(point) {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahDegeneratedGC; }
+  const char* name()             const { return "Shenandoah Degenerated GC"; }
+  virtual  void doit();
+};
+
+class VM_ShenandoahFullGC : public VM_ShenandoahReferenceOperation {
+private:
+  GCCause::Cause _gc_cause;
+public:
+  VM_ShenandoahFullGC(GCCause::Cause gc_cause) : VM_ShenandoahReferenceOperation(), _gc_cause(gc_cause) {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahFullGC; }
+  const char* name()             const { return "Shenandoah Full GC"; }
+  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() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahInitUpdateRefs; }
+  const char* name()             const { return "Shenandoah Init Update References"; }
+  virtual void doit();
+};
+
+class VM_ShenandoahFinalUpdateRefs: public VM_ShenandoahOperation {
+public:
+  VM_ShenandoahFinalUpdateRefs() : VM_ShenandoahOperation() {};
+  VM_Operation::VMOp_Type type() const { return VMOp_ShenandoahFinalUpdateRefs; }
+  const char* name()             const { return "Shenandoah Final Update References"; }
+  virtual void doit();
+};
+
+#endif //SHARE_VM_GC_SHENANDOAH_VM_OPERATIONS_SHENANDOAH_HPP