1 /* 2 * Copyright (c) 2013, 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 import com.sun.beans.finder.MethodFinder; 25 26 import java.lang.reflect.Method; 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 methods have synchronized access 35 * @author Sergey Malenkov 36 * @modules java.desktop/com.sun.beans.finder 37 * @compile -XDignore.symbol.file TestMethodFinder.java 38 * @run main TestMethodFinder 39 */ 40 41 public class TestMethodFinder { 42 public static void main(String[] args) throws Exception { 43 List<Class<?>> classes = Task.getClasses(4000); 44 List<Method> methods = new ArrayList<>(); 45 for (Class<?> type : classes) { 46 Collections.addAll(methods, type.getMethods()); 47 } 48 Task.print("found " + methods.size() + " methods in " + classes.size() + " classes"); 49 50 List<Task> tasks = new ArrayList<>(); 51 for (int i = 0; i < 50; i++) { 52 tasks.add(new Task<Method>(methods) { 53 @Override 54 protected void process(Method method) throws NoSuchMethodException { 55 MethodFinder.findMethod(method.getDeclaringClass(), method.getName(), method.getParameterTypes()); 56 } 57 }); 58 } 59 int alarm = 0; 60 while (true) { 61 int alive = 0; 62 int working = 0; 63 for (Task task : tasks) { 64 if (task.isWorking()) { 65 working++; 66 alive++; 67 } else if (task.isAlive()) { 68 alive++; 69 } 70 } 71 if (alive == 0) { 72 break; 73 } 74 Task.print(working + " out of " + alive + " threads are working"); 75 if ((working == 0) && (++alarm == 10)) { 76 throw new RuntimeException("FAIL - DEADLOCK DETECTED"); 77 } 78 Thread.sleep(1000); 79 } 80 } 81 }