1 /*
   2  * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /* @test
  25  * @summary test JNI critical arrays support in Shenandoah
  26  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:+ShenandoahVerify                 ShenandoahJNICritical
  27  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive ShenandoahJNICritical
  28  */
  29 
  30 import java.util.Arrays;
  31 
  32 public class ShenandoahJNICritical {
  33     static {
  34         System.loadLibrary("ShenandoahJNICritical");
  35     }
  36 
  37     private static final int NUM_RUNS = 10000;
  38     private static final int ARRAY_SIZE=10000;
  39     private static int[] a;
  40     private static int[] b;
  41     private static native void copyAtoB(int[] a, int[] b);
  42 
  43     public static void main(String[] args) {
  44         a = new int[ARRAY_SIZE];
  45         b = new int[ARRAY_SIZE];
  46         for (int i = 0; i < NUM_RUNS; i++) {
  47             test();
  48         }
  49     }
  50 
  51     private static void test() {
  52         int[] a1 = new int[ARRAY_SIZE];
  53         int[] b1 = new int[ARRAY_SIZE];
  54         fillArray(a);
  55         copyAtoB(a, b);
  56         copyAtoB(a1, b1); // Don't optimize out garbage arrays.
  57         if (! Arrays.equals(a, b)) {
  58             throw new RuntimeException("arrays not equal");
  59         }
  60     }
  61 
  62     private static void fillArray(int[] array) {
  63         for (int i = 0; i < ARRAY_SIZE; i++) {
  64             int val = (int) (Math.random() * Integer.MAX_VALUE);
  65             array[i] = val;
  66         }
  67     }
  68 }