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      1 /*
      2  * Copyright (C) 2009 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.*;
     18 
     19 /**
     20  * Test for Jit regressions.
     21  */
     22 public class Main {
     23     public static void main(String args[]) throws Exception {
     24         b2296099Test();
     25         b2302318Test();
     26         b2487514Test();
     27     }
     28 
     29     static void b2296099Test() throws Exception {
     30        int x = -1190771042;
     31        int dist = 360530809;
     32        int xl = -1190771042;
     33        int distl = 360530809;
     34 
     35        for (int i = 0; i < 100000; i++) {
     36            int b = rotateLeft(x, dist);
     37            if (b != 1030884493)
     38                throw new RuntimeException("Unexpected value: " + b
     39                        + " after " + i + " iterations");
     40        }
     41        for (int i = 0; i < 100000; i++) {
     42            long bl = rotateLeft(xl, distl);
     43            if (bl != 1030884493)
     44                throw new RuntimeException("Unexpected value: " + bl
     45                        + " after " + i + " iterations");
     46        }
     47        System.out.println("b2296099 passes");
     48    }
     49 
     50     static int rotateLeft(int i, int distance) {
     51         return ((i << distance) | (i >>> (-distance)));
     52     }
     53 
     54     static void b2302318Test() {
     55         System.gc();
     56 
     57         SpinThread slow = new SpinThread(Thread.MIN_PRIORITY);
     58         SpinThread fast1 = new SpinThread(Thread.NORM_PRIORITY);
     59         SpinThread fast2 = new SpinThread(Thread.MAX_PRIORITY);
     60 
     61         slow.setDaemon(true);
     62         fast1.setDaemon(true);
     63         fast2.setDaemon(true);
     64 
     65         fast2.start();
     66         slow.start();
     67         fast1.start();
     68         try {
     69             Thread.sleep(3000);
     70         } catch (InterruptedException ie) {/*ignore */}
     71         System.gc();
     72 
     73         System.out.println("b2302318 passes");
     74     }
     75 
     76     static void b2487514Test() {
     77         PriorityBlockingQueue q = new PriorityBlockingQueue(10);
     78         int catchCount = 0;
     79 
     80         q.offer(new Integer(0));
     81         /*
     82          * Warm up the code cache to have toArray() compiled. The key here is
     83          * to pass a compatible type so that there are no exceptions when
     84          * executing the method body (ie the APUT_OBJECT bytecode).
     85          */
     86         for (int i = 0; i < 1000; i++) {
     87             Integer[] ints = (Integer[]) q.toArray(new Integer[5]);
     88         }
     89 
     90         /* Now pass an incompatible type which is guaranteed to throw */
     91         for (int i = 0; i < 1000; i++) {
     92             try {
     93                 Object[] obj = q.toArray(new String[5]);
     94             }
     95             catch (ArrayStoreException  success) {
     96                 catchCount++;
     97             }
     98         }
     99 
    100         if (catchCount == 1000) {
    101             System.out.println("b2487514 passes");
    102         }
    103         else {
    104             System.out.println("b2487514 fails: catchCount is " + catchCount +
    105                                " (expecting 1000)");
    106         }
    107     }
    108 }
    109 
    110 class SpinThread extends Thread {
    111     int mPriority;
    112 
    113     SpinThread(int prio) {
    114         super("Spin prio=" + prio);
    115         mPriority = prio;
    116     }
    117 
    118     public void run() {
    119         setPriority(mPriority);
    120         while (true) {}
    121     }
    122 }
    123