1 /* 2 * Copyright (C) 2008 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.Timer; 18 import java.util.TimerTask; 19 20 /* 21 * Throw an exception from a finalizer and make sure it's harmless. Under 22 * Dalvik this may also generate a warning in the log file. 23 */ 24 public class Main { 25 static Object waiter = new Object(); 26 static volatile boolean didFinal = false; 27 28 private volatile static Throwable preallocatedException; 29 30 static void createAndForget() { 31 Main main = new Main(); 32 } 33 34 public static void main(String[] args) { 35 // Preallocate exception to lighten the load in the time-sensitive section. 36 preallocatedException = new InterruptedException("whee"); 37 // Print out something to avoid effects of being the first to write. 38 System.out.println("Starting"); 39 40 createAndForget(); 41 42 System.gc(); 43 System.runFinalization(); 44 45 new Timer(true).schedule(new TimerTask() { 46 public void run() { 47 System.out.println("Timed out, exiting"); 48 System.exit(1); 49 } 50 }, 30000); 51 52 while (!didFinal) { 53 try { 54 Thread.sleep(500); 55 } catch (InterruptedException ie) { 56 System.out.println(ie); 57 } 58 } 59 60 /* give it a chance to cause mayhem */ 61 try { 62 Thread.sleep(750); 63 } catch (InterruptedException ie) { 64 System.out.println(ie); 65 } 66 67 System.out.println("done"); 68 } 69 70 protected void finalize() throws Throwable { 71 System.out.println("In finalizer"); 72 73 didFinal = true; 74 75 throw preallocatedException; 76 } 77 } 78
