| /* |
| * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import com.sun.beans.finder.MethodFinder; |
| |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /* |
| * @test |
| * @bug 8028054 |
| * @summary Tests that cached methods have synchronized access |
| * @author Sergey Malenkov |
| * @modules java.desktop/com.sun.beans.finder |
| * java.activation |
| * java.transaction |
| * java.corba |
| * java.xml.bind |
| * @compile -XDignore.symbol.file TestMethodFinder.java |
| * @run main TestMethodFinder |
| */ |
| |
| public class TestMethodFinder { |
| public static void main(String[] args) throws Exception { |
| List<Class<?>> classes = Task.getClasses(4000); |
| List<Method> methods = new ArrayList<>(); |
| for (Class<?> type : classes) { |
| Collections.addAll(methods, type.getMethods()); |
| } |
| Task.print("found " + methods.size() + " methods in " + classes.size() + " classes"); |
| |
| List<Task> tasks = new ArrayList<>(); |
| for (int i = 0; i < 50; i++) { |
| tasks.add(new Task<Method>(methods) { |
| @Override |
| protected void process(Method method) throws NoSuchMethodException { |
| MethodFinder.findMethod(method.getDeclaringClass(), method.getName(), method.getParameterTypes()); |
| } |
| }); |
| } |
| int alarm = 0; |
| while (true) { |
| int alive = 0; |
| int working = 0; |
| for (Task task : tasks) { |
| if (task.isWorking()) { |
| working++; |
| alive++; |
| } else if (task.isAlive()) { |
| alive++; |
| } |
| } |
| if (alive == 0) { |
| break; |
| } |
| Task.print(working + " out of " + alive + " threads are working"); |
| if ((working == 0) && (++alarm == 10)) { |
| throw new RuntimeException("FAIL - DEADLOCK DETECTED"); |
| } |
| Thread.sleep(1000); |
| } |
| } |
| } |