--- /dev/null	2018-04-03 12:55:20.301839954 +0200
+++ new/src/hotspot/share/gc/z/zUtils.cpp	2018-06-08 19:46:46.180848031 +0200
@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+
+#include "precompiled.hpp"
+#include "gc/shared/collectedHeap.hpp"
+#include "gc/z/zAddress.inline.hpp"
+#include "gc/z/zUtils.inline.hpp"
+#include "utilities/debug.hpp"
+
+#include <stdlib.h>
+
+uintptr_t ZUtils::alloc_aligned(size_t alignment, size_t size) {
+  void* res = NULL;
+
+  if (posix_memalign(&res, alignment, size) != 0) {
+    fatal("posix_memalign() failed");
+  }
+
+  memset(res, 0, size);
+
+  return (uintptr_t)res;
+}
+
+void ZUtils::insert_filler_object(uintptr_t addr, size_t size) {
+  const size_t fill_size_in_words = bytes_to_words(size);
+  if (fill_size_in_words >= CollectedHeap::min_fill_size()) {
+    CollectedHeap::fill_with_objects((HeapWord*)ZAddress::good(addr), fill_size_in_words);
+  }
+}