--- /dev/null	2018-04-03 12:55:20.301839954 +0200
+++ new/src/hotspot/share/gc/z/zMemory.inline.hpp	2018-06-08 19:46:21.076758857 +0200
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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_GC_Z_ZMEMORY_INLINE_HPP
+#define SHARE_GC_Z_ZMEMORY_INLINE_HPP
+
+#include "gc/z/zMemory.hpp"
+#include "utilities/debug.hpp"
+
+inline ZMemory::ZMemory(uintptr_t start, size_t size) :
+    _start(start),
+    _end(start + size) {}
+
+inline uintptr_t ZMemory::start() const {
+  return _start;
+}
+
+inline uintptr_t ZMemory::end() const {
+  return _end;
+}
+
+inline size_t ZMemory::size() const {
+  return end() - start();
+}
+
+inline void ZMemory::shrink_from_front(size_t size) {
+  assert(this->size() > size, "Too small");
+  _start += size;
+}
+
+inline void ZMemory::shrink_from_back(size_t size) {
+  assert(this->size() > size, "Too small");
+  _end -= size;
+}
+
+inline void ZMemory::grow_from_front(size_t size) {
+  assert(start() >= size, "Too big");
+  _start -= size;
+}
+
+inline void ZMemory::grow_from_back(size_t size) {
+  _end += size;
+}
+
+#endif // SHARE_GC_Z_ZMEMORY_INLINE_HPP