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 TestJNICritical
  25  * @summary test JNI critical arrays support in Shenandoah
  26  * @key gc
  27  * @requires vm.gc.Shenandoah
  28  *
  29  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:+ShenandoahVerify                 TestJNICritical
  30  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive TestJNICritical
  31  */
  32 
  33 import java.util.Arrays;
  34 
  35 public class TestJNICritical {
  36     static {
  37         System.loadLibrary("TestJNICritical");
  38     }
  39 
  40     private static final int NUM_RUNS   = 10000;
  41     private static final int ARRAY_SIZE = 10000;
  42     private static int[] a;
  43     private static int[] b;
  44 
  45     private static native void copyAtoB(int[] a, int[] b);
  46 
  47     public static void main(String[] args) {
  48         a = new int[ARRAY_SIZE];
  49         b = new int[ARRAY_SIZE];
  50         for (int i = 0; i < NUM_RUNS; i++) {
  51             test();
  52         }
  53     }
  54 
  55     private static void test() {
  56         int[] a1 = new int[ARRAY_SIZE];
  57         int[] b1 = new int[ARRAY_SIZE];
  58         fillArray(a);
  59         copyAtoB(a, b);
  60         copyAtoB(a1, b1); // Don't optimize out garbage arrays.
  61         if (!Arrays.equals(a, b)) {
  62             throw new RuntimeException("arrays not equal");
  63         }
  64     }
  65 
  66     private static void fillArray(int[] array) {
  67         for (int i = 0; i < ARRAY_SIZE; i++) {
  68             int val = (int) (Math.random() * Integer.MAX_VALUE);
  69             array[i] = val;
  70         }
  71     }
  72 }