1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.util.concurrent.CyclicBarrier; 18 19 /** 20 * This causes most VMs to lock up. 21 * 22 * Interrupting threads in class initialization should NOT work. 23 */ 24 public class Main { 25 public static boolean aInitialized = false; 26 public static boolean bInitialized = false; 27 28 public static CyclicBarrier barrier = new CyclicBarrier(3); 29 30 static public void main(String[] args) { 31 Thread thread1, thread2; 32 33 System.out.println("Deadlock test starting."); 34 thread1 = new Thread() { public void run() { new A(); } }; 35 thread2 = new Thread() { public void run() { new B(); } }; 36 thread1.start(); 37 thread2.start(); 38 39 // Not expecting any exceptions, so print them out if we get them. 40 try { barrier.await(); } catch (Exception e) { System.out.println(e); } 41 try { Thread.sleep(6000); } catch (InterruptedException ie) { } 42 43 System.out.println("Deadlock test interrupting threads."); 44 thread1.interrupt(); 45 thread2.interrupt(); 46 System.out.println("Deadlock test main thread bailing."); 47 System.out.println("A initialized: " + aInitialized); 48 System.out.println("B initialized: " + bInitialized); 49 System.exit(0); 50 } 51 } 52 53 class A { 54 static { 55 // Not expecting any exceptions, so print them out if we get them. 56 try { Main.barrier.await(); } catch (Exception e) { System.out.println(e); } 57 new B(); 58 System.out.println("A initialized"); 59 Main.aInitialized = true; 60 } 61 } 62 63 class B { 64 static { 65 // Not expecting any exceptions, so print them out if we get them. 66 try { Main.barrier.await(); } catch (Exception e) { System.out.println(e); } 67 new A(); 68 System.out.println("B initialized"); 69 Main.bInitialized = true; 70 } 71 } 72
