1 /* 2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8061616 27 * @summary Basic Test for HotSpotDiagnosticMXBean.getVMOption() and double values 28 * @author Jaroslav Bachorik 29 * 30 * @modules jdk.management 31 * @run main/othervm -XX:CompileThresholdScaling=0.14 GetDoubleVMOption 32 */ 33 34 import com.sun.management.HotSpotDiagnosticMXBean; 35 import com.sun.management.VMOption; 36 import java.lang.management.ManagementFactory; 37 import java.util.List; 38 import javax.management.MBeanServer; 39 40 public class GetDoubleVMOption { 41 private static final String COMPILE_THRESHOLD_SCALING = "CompileThresholdScaling"; 42 private static final String EXPECTED_VALUE = "0.14"; 43 private static final String HOTSPOT_DIAGNOSTIC_MXBEAN_NAME = 44 "com.sun.management:type=HotSpotDiagnostic"; 45 46 public static void main(String[] args) throws Exception { 47 List<HotSpotDiagnosticMXBean> list = 48 ManagementFactory.getPlatformMXBeans(HotSpotDiagnosticMXBean.class); 49 HotSpotDiagnosticMXBean mbean = list.get(0); 50 checkVMOption(mbean); 51 52 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); 53 mbean = ManagementFactory.newPlatformMXBeanProxy(mbs, 54 HOTSPOT_DIAGNOSTIC_MXBEAN_NAME, 55 HotSpotDiagnosticMXBean.class); 56 checkVMOption(mbean); 57 } 58 59 private static void checkVMOption(HotSpotDiagnosticMXBean mbean) { 60 VMOption option = mbean.getVMOption(COMPILE_THRESHOLD_SCALING); 61 if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) { 62 throw new RuntimeException("Unexpected value: " + 63 option.getValue() + " expected: " + EXPECTED_VALUE); 64 } 65 } 66 }