--- /dev/null	2018-11-26 11:49:18.255023023 +0100
+++ new/src/hotspot/share/gc/shenandoah/vm_operations_shenandoah.cpp	2018-11-26 21:30:15.579998065 +0100
@@ -0,0 +1,85 @@
+/*
+ * 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.
+ *
+ */
+
+#include "precompiled.hpp"
+
+#include "gc/shenandoah/shenandoahHeap.inline.hpp"
+#include "gc/shenandoah/shenandoahUtils.hpp"
+#include "gc/shenandoah/vm_operations_shenandoah.hpp"
+
+bool VM_ShenandoahReferenceOperation::doit_prologue() {
+  Heap_lock->lock();
+  return true;
+}
+
+void VM_ShenandoahReferenceOperation::doit_epilogue() {
+  if (Universe::has_reference_pending_list()) {
+    Heap_lock->notify_all();
+  }
+  Heap_lock->unlock();
+}
+
+void VM_ShenandoahInitMark::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_init_mark();
+}
+
+void VM_ShenandoahFinalMarkStartEvac::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_final_mark();
+}
+
+void VM_ShenandoahFinalEvac::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_final_evac();
+}
+
+void VM_ShenandoahFullGC::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::FULL);
+  ShenandoahHeap::heap()->entry_full(_gc_cause);
+}
+
+void VM_ShenandoahDegeneratedGC::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_degenerated(_point);
+}
+
+void VM_ShenandoahInitTraversalGC::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_init_traversal();
+}
+
+void VM_ShenandoahFinalTraversalGC::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_final_traversal();
+}
+
+void VM_ShenandoahInitUpdateRefs::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_init_updaterefs();
+}
+
+void VM_ShenandoahFinalUpdateRefs::doit() {
+  ShenandoahGCPauseMark mark(_gc_id, SvcGCMarker::CONCURRENT);
+  ShenandoahHeap::heap()->entry_final_updaterefs();
+}