1 /* 2 * Copyright (c) 2013, 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 import com.sun.beans.finder.ConstructorFinder; 25 26 import java.lang.reflect.Constructor; 27 import java.util.ArrayList; 28 import java.util.Collections; 29 import java.util.List; 30 31 /* 32 * @test 33 * @bug 8028054 34 * @summary Tests that cached constructors have synchronized access 35 * @author Sergey Malenkov 36 * @compile -XDignore.symbol.file TestConstructorFinder.java 37 * @run main TestConstructorFinder 38 */ 39 40 public class TestConstructorFinder { 41 public static void main(String[] args) throws Exception { 42 List<Class<?>> classes = Task.getClasses(Integer.MAX_VALUE); 43 List<Constructor> constructors = new ArrayList<>(); 44 for (Class<?> type : classes) { 45 Collections.addAll(constructors, type.getConstructors()); 46 } 47 Task.print("found " + constructors.size() + " constructors in " + classes.size() + " classes"); 48 49 List<Task> tasks = new ArrayList<>(); 50 for (int i = 0; i < 50; i++) { 51 tasks.add(new Task<Constructor>(constructors) { 52 @Override 53 protected void process(Constructor constructor) throws NoSuchMethodException { 54 ConstructorFinder.findConstructor(constructor.getDeclaringClass(), constructor.getParameterTypes()); 55 } 56 }); 57 } 58 int alarm = 0; 59 while (true) { 60 int alive = 0; 61 int working = 0; 62 for (Task task : tasks) { 63 if (task.isWorking()) { 64 working++; 65 alive++; 66 } else if (task.isAlive()) { 67 alive++; 68 } 69 } 70 if (alive == 0) { 71 break; 72 } 73 Task.print(working + " out of " + alive + " threads are working"); 74 if ((working == 0) && (++alarm == 10)) { 75 Task.print("DEADLOCK DETECTED"); 76 System.exit(100); 77 } 78 Thread.sleep(1000); 79 } 80 } 81 }