0N/A/*
6082N/A * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4858522
0N/A * @summary Basic unit test of HotspotClassLoadingMBean.getClassLoadingTime()
0N/A * @author Steve Bohne
0N/A * @build ClassToLoad0
6082N/A * @run main GetClassLoadingTime
0N/A */
0N/A
0N/A/*
0N/A * This test is just a sanity check and does not check for the correct value.
0N/A */
0N/A
0N/Aimport java.io.*;
0N/Aimport sun.management.*;
0N/A
0N/Apublic class GetClassLoadingTime {
0N/A
0N/A private static HotspotClassLoadingMBean mbean =
180N/A (HotspotClassLoadingMBean)ManagementFactoryHelper.getHotspotClassLoadingMBean();
0N/A
0N/A // Careful with these values.
0N/A private static final long MIN_TIME_FOR_PASS = 1;
0N/A private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE;
0N/A
0N/A private static boolean trace = false;
0N/A
0N/A public static void main(String args[]) throws Exception {
0N/A if (args.length > 0 && args[0].equals("trace")) {
0N/A trace = true;
0N/A }
0N/A
0N/A long time = mbean.getClassLoadingTime();
0N/A
0N/A if (trace) {
0N/A System.out.println("Class loading time (ms): " + time);
0N/A }
0N/A
0N/A if (time < MIN_TIME_FOR_PASS || time > MAX_TIME_FOR_PASS) {
0N/A throw new RuntimeException("Class loading time " +
0N/A "illegal value: " + time + " ms " +
0N/A "(MIN = " + MIN_TIME_FOR_PASS + "; " +
0N/A "MAX = " + MAX_TIME_FOR_PASS + ")");
0N/A }
0N/A
0N/A // Load some classes to increase the time
0N/A for (int i = 0; i < 1000; i++) {
0N/A Class.forName("ClassToLoad0", true, new KlassLoader());
0N/A }
0N/A
0N/A long time2 = mbean.getClassLoadingTime();
0N/A
0N/A if (trace) {
0N/A System.out.println("Class loading time2 (ms): " + time2);
0N/A }
0N/A
0N/A if (time2 <= time) {
0N/A throw new RuntimeException("Class loading time " +
0N/A "did not increase when class loaded" +
0N/A "(time = " + time + "; " +
0N/A "time2 = " + time2 + ")");
0N/A }
0N/A
0N/A System.out.println("Test passed.");
0N/A }
0N/A}
0N/A
0N/A// KlassLoader exists to load classes without a parent classloader,
0N/A// so we can avoid delegation and spend lots of time loading the
0N/A// same class over and over, to test the class loading timer.
0N/Aclass KlassLoader extends ClassLoader {
0N/A
0N/A public KlassLoader() {
0N/A super(null);
0N/A }
0N/A
0N/A protected synchronized Class findClass(String name)
0N/A throws ClassNotFoundException {
6082N/A String cname =
6082N/A name.replace('.', '/')
0N/A +".class";
0N/A
0N/A FileInputStream in;
0N/A try {
6082N/A in = new FileInputStream(new File(System.getProperty("test.classes", "."), cname));
0N/A if (in == null) {
0N/A throw new ClassNotFoundException("getResourceAsStream("
0N/A +cname+")");
0N/A }
0N/A } catch(java.io.FileNotFoundException e ) {
0N/A throw new ClassNotFoundException("getResourceAsStream("
0N/A +cname+") : "
0N/A +e);
0N/A }
0N/A
0N/A int len;
0N/A byte data[];
0N/A try {
0N/A len = in.available();
0N/A data = new byte[len];
0N/A for (int total = 0; total < data.length; ) {
0N/A total += in.read(data, total, data.length - total);
0N/A }
0N/A } catch (IOException e) {
0N/A throw new ClassNotFoundException(cname, e);
0N/A } finally {
0N/A try {
0N/A in.close();
0N/A } catch (IOException e) {
0N/A }
0N/A }
0N/A
0N/A return defineClass(name, data, 0, data.length);
0N/A }
0N/A}