--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahMemoryPool.cpp	Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,46 @@
+/*
+ * 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/shenandoahMemoryPool.hpp"
+
+ShenandoahMemoryPool::ShenandoahMemoryPool(ShenandoahHeap* heap) :
+        CollectedMemoryPool("Shenandoah",
+                            heap->capacity(),
+                            heap->max_capacity(),
+                            true /* support_usage_threshold */),
+                            _heap(heap) {}
+
+MemoryUsage ShenandoahMemoryPool::get_memory_usage() {
+  size_t initial   = initial_size();
+  size_t max       = max_size();
+  size_t used      = used_in_bytes();
+  size_t committed = _heap->committed();
+
+  assert(initial <= max,    "initial: "   SIZE_FORMAT ", max: "       SIZE_FORMAT, initial,   max);
+  assert(used <= max,       "used: "      SIZE_FORMAT ", max: "       SIZE_FORMAT, used,      max);
+  assert(committed <= max,  "committed: " SIZE_FORMAT ", max: "       SIZE_FORMAT, committed, max);
+  assert(used <= committed, "used: "      SIZE_FORMAT ", committed: " SIZE_FORMAT, used,      committed);
+
+  return MemoryUsage(initial, used, committed, max);
+}