1 /* 2 * Copyright (c) 2013, 2017, 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 * @modules java.desktop/com.sun.beans.finder 37 * java.activation 38 * java.transaction 39 * java.corba 40 * java.xml.bind 41 * @compile -XDignore.symbol.file TestConstructorFinder.java 42 * @run main TestConstructorFinder 43 */ 44 45 public class TestConstructorFinder { 46 public static void main(String[] args) throws Exception { 47 List<Class<?>> classes = Task.getClasses(Integer.MAX_VALUE); 48 List<Constructor> constructors = new ArrayList<>(); 49 for (Class<?> type : classes) { 50 Collections.addAll(constructors, type.getConstructors()); 51 } 52 Task.print("found " + constructors.size() + " constructors in " + classes.size() + " classes"); 53 54 List<Task> tasks = new ArrayList<>(); 55 for (int i = 0; i < 50; i++) { 56 tasks.add(new Task<Constructor>(constructors) { 57 @Override 58 protected void process(Constructor constructor) throws NoSuchMethodException { 59 ConstructorFinder.findConstructor(constructor.getDeclaringClass(), constructor.getParameterTypes()); 60 } 61 }); 62 } 63 int alarm = 0; 64 while (true) { 65 int alive = 0; 66 int working = 0; 67 for (Task task : tasks) { 68 if (task.isWorking()) { 69 working++; 70 alive++; 71 } else if (task.isAlive()) { 72 alive++; 73 } 74 } 75 if (alive == 0) { 76 break; 77 } 78 Task.print(working + " out of " + alive + " threads are working"); 79 if ((working == 0) && (++alarm == 10)) { 80 throw new RuntimeException("FAIL - DEADLOCK DETECTED"); 81 } 82 Thread.sleep(1000); 83 } 84 } 85 }