--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.management/share/classes/sun/management/HotspotRuntime.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2003, 2005, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.management;
+
+import java.util.List;
+import java.util.ArrayList;
+import sun.management.counter.Counter;
+
+
+/**
+ * Implementation class of HotspotRuntimeMBean interface.
+ *
+ * Internal, uncommitted management interface for Hotspot runtime
+ * system.
+ */
+class HotspotRuntime
+    implements HotspotRuntimeMBean {
+
+    private VMManagement jvm;
+
+    /**
+     * Constructor of HotspotRuntime class.
+     */
+    HotspotRuntime(VMManagement vm) {
+        jvm = vm;
+    }
+
+    public long getSafepointCount() {
+        return jvm.getSafepointCount();
+    }
+
+    public long getTotalSafepointTime() {
+        return jvm.getTotalSafepointTime();
+    }
+
+    public long getSafepointSyncTime() {
+        return jvm.getSafepointSyncTime();
+    }
+
+    // Performance counter support
+    private static final String JAVA_RT          = "java.rt.";
+    private static final String COM_SUN_RT       = "com.sun.rt.";
+    private static final String SUN_RT           = "sun.rt.";
+    private static final String JAVA_PROPERTY    = "java.property.";
+    private static final String COM_SUN_PROPERTY = "com.sun.property.";
+    private static final String SUN_PROPERTY     = "sun.property.";
+    private static final String RT_COUNTER_NAME_PATTERN =
+        JAVA_RT + "|" + COM_SUN_RT + "|" + SUN_RT + "|" +
+        JAVA_PROPERTY + "|" + COM_SUN_PROPERTY + "|" + SUN_PROPERTY;
+
+    public java.util.List<Counter> getInternalRuntimeCounters() {
+        return jvm.getInternalCounters(RT_COUNTER_NAME_PATTERN);
+    }
+}