1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 package org.apache.harmony.jpda.tests.jdwp.Events; 20 21 import org.apache.harmony.jpda.tests.framework.LogWriter; 22 import org.apache.harmony.jpda.tests.share.JPDADebuggeeSynchronizer; 23 import org.apache.harmony.jpda.tests.share.SyncDebuggee; 24 25 public class MonitorContendedEnterAndEnteredDebuggee extends SyncDebuggee { 26 27 static final String TESTED_THREAD = "BLOCKED_THREAD"; 28 29 static Object lock = new MonitorWaitMockMonitor(); 30 31 BlockedThread thread; 32 33 @Override 34 public void run() { 35 thread = new BlockedThread(logWriter,TESTED_THREAD); 36 37 // Inform debugger test is ready for testing 38 logWriter.println("--> Main thread : started"); 39 synchronizer.sendMessage(JPDADebuggeeSynchronizer.SGNL_READY); 40 41 synchronized (lock) { 42 // Request has been set by Debugger 43 synchronizer.receiveMessage(JPDADebuggeeSynchronizer.SGNL_CONTINUE); 44 45 logWriter.println("main thread: start tested thread"); 46 thread.start(); 47 48 // wait and hold the lock until the second thread blocks 49 while (!thread.getState().equals(Thread.State.valueOf("BLOCKED"))){ 50 Thread.yield(); 51 logWriter.println("main thread: Waiting for second thread to attempt to lock a monitor"); 52 } 53 54 logWriter.println("--> main thread: finish test"); 55 } 56 } 57 58 static class BlockedThread extends Thread { 59 private LogWriter logWriter; 60 61 public BlockedThread(LogWriter writer, String name){ 62 logWriter = writer; 63 this.setName(name); 64 } 65 66 @Override 67 public void run() { 68 logWriter.println("--> BlockedThread: start to run"); 69 70 synchronized (lock) { 71 this.getName().trim(); 72 logWriter.println("--> BlockedThread: get lock"); 73 } 74 } 75 } 76 77 public static void main(String[] args) { 78 runDebuggee(MonitorContendedEnterAndEnteredDebuggee.class); 79 } 80 81 } 82 83
