1 /* 2 * Copyright (c) 2003, 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 4858522 27 * @summary Basic unit test of HotspotClassLoadingMBean.getLoadedClassSize() 28 * @author Steve Bohne 29 * 30 * @run main/othervm -XX:+UsePerfData GetLoadedClassSize 31 */ 32 33 /* 34 * This test is just a sanity check and does not check for the correct value. 35 */ 36 37 import sun.management.*; 38 39 public class GetLoadedClassSize { 40 41 private static HotspotClassLoadingMBean mbean = 42 (HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean(); 43 44 // Careful with these values. 45 private static final long MIN_VALUE_FOR_PASS = 1; 46 private static final long MAX_VALUE_FOR_PASS = Long.MAX_VALUE; 47 48 private static boolean trace = false; 49 50 public static void main(String args[]) throws Exception { 51 if (args.length > 0 && args[0].equals("trace")) { 52 trace = true; 53 } 54 55 long value = mbean.getLoadedClassSize(); 56 57 if (trace) { 58 System.out.println("Loaded class size (bytes): " + value); 59 } 60 61 if (value < MIN_VALUE_FOR_PASS || value > MAX_VALUE_FOR_PASS) { 62 throw new RuntimeException("Loaded class size " + 63 "illegal value: " + value + " bytes " + 64 "(MIN = " + MIN_VALUE_FOR_PASS + "; " + 65 "MAX = " + MAX_VALUE_FOR_PASS + ")"); 66 } 67 68 // increase the size 69 Class.forName("ClassToLoad1"); 70 71 72 long value2 = mbean.getLoadedClassSize(); 73 74 if (trace) { 75 System.out.println("Loaded class size2 (bytes): " + value2); 76 } 77 78 if (value2 <= value) { 79 throw new RuntimeException("Loaded class size " + 80 "did not increase " + 81 "(value = " + value + "; " + 82 "value2 = " + value2 + ")"); 83 } 84 System.out.println("Test passed."); 85 } 86 } 87 88 class ClassToLoad1 {}