1 /*
   2  * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 /* @test TestJNICritical
  26  * @summary test JNI critical arrays support in Shenandoah
  27  * @key randomness
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  * @library /test/lib
  30  *
  31  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:+ShenandoahVerify                 TestJNICritical
  32  * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive TestJNICritical
  33  */
  34 
  35 import java.util.Arrays;
  36 import java.util.Random;
  37 import jdk.test.lib.Utils;
  38 
  39 public class TestJNICritical {
  40     static {
  41         System.loadLibrary("TestJNICritical");
  42     }
  43 
  44     private static final int NUM_RUNS   = 10000;
  45     private static final int ARRAY_SIZE = 10000;
  46     private static int[] a;
  47     private static int[] b;
  48 
  49     private static native void copyAtoB(int[] a, int[] b);
  50 
  51     public static void main(String[] args) {
  52         a = new int[ARRAY_SIZE];
  53         b = new int[ARRAY_SIZE];
  54         for (int i = 0; i < NUM_RUNS; i++) {
  55             test();
  56         }
  57     }
  58 
  59     private static void test() {
  60         int[] a1 = new int[ARRAY_SIZE];
  61         int[] b1 = new int[ARRAY_SIZE];
  62         fillArray(a);
  63         copyAtoB(a, b);
  64         copyAtoB(a1, b1); // Don't optimize out garbage arrays.
  65         if (!Arrays.equals(a, b)) {
  66             throw new RuntimeException("arrays not equal");
  67         }
  68     }
  69 
  70     private static void fillArray(int[] array) {
  71         Random r = Utils.getRandomInstance();
  72         for (int i = 0; i < ARRAY_SIZE; i++) {
  73             int val = (int) (r.nextDouble() * Integer.MAX_VALUE);
  74             array[i] = val;
  75         }
  76     }
  77 }