1 /* 2 * Copyright (C) 2016 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 public class Main implements Runnable { 18 static final int numberOfThreads = 2; 19 static final int totalOperations = 40000; 20 static boolean sFlag = false; 21 static volatile boolean done = false; 22 int threadIndex; 23 24 public static native void deoptimizeAll(); 25 public static native void undeoptimizeAll(); 26 27 Main(int index) { 28 threadIndex = index; 29 } 30 31 public static void main(String[] args) throws Exception { 32 System.loadLibrary(args[0]); 33 34 final Thread[] threads = new Thread[numberOfThreads]; 35 for (int t = 0; t < threads.length; t++) { 36 threads[t] = new Thread(new Main(t)); 37 threads[t].start(); 38 } 39 for (Thread t : threads) { 40 t.join(); 41 } 42 System.out.println("Finishing"); 43 } 44 45 public String $noinline$run0() { 46 // Prevent inlining. 47 if (sFlag) { 48 throw new Error(); 49 } 50 char[] arr = {'a', 'b', 'c'}; 51 String str = new String(arr, 0, arr.length); 52 if (!str.equals("abc")) { 53 System.out.println("Failure 1! " + str); 54 System.exit(0); 55 } 56 return str; 57 } 58 59 public void run() { 60 if (threadIndex == 0) { 61 // This thread keeps doing deoptimization of all threads. 62 // Hopefully that will trigger one deoptimization when returning from 63 // StringFactory.newEmptyString() in one of the other threads. 64 for (int i = 0; i < totalOperations; ++i) { 65 if (i % 50 == 0) { 66 deoptimizeAll(); 67 } 68 if (i % 50 == 25) { 69 undeoptimizeAll(); 70 } 71 } 72 done = true; 73 } else { 74 // This thread keeps doing new String() from a char array. 75 while (!done) { 76 String str = $noinline$run0(); 77 if (!str.equals("abc")) { 78 System.out.println("Failure 2! " + str); 79 System.exit(0); 80 } 81 } 82 } 83 } 84 } 85
