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
26  * @summary test JNI critical arrays support in Shenandoah
27  * @key randomness
28  * @requires vm.gc.Shenandoah
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 }