1 /*
  2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
  3  * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
  4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  5  *
  6  * This code is free software; you can redistribute it and/or modify it
  7  * under the terms of the GNU General Public License version 2 only, as
  8  * published by the Free Software Foundation.
  9  *
 10  * This code is distributed in the hope that it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 13  * version 2 for more details (a copy is included in the LICENSE file that
 14  * accompanied this code).
 15  *
 16  * You should have received a copy of the GNU General Public License version
 17  * 2 along with this work; if not, write to the Free Software Foundation,
 18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 21  * or visit www.oracle.com if you need additional information or have any
 22  * questions.
 23  *
 24  */
 25 
 26 /* @test id=aggressive-verify
 27  * @summary Test JNI Global Refs with Shenandoah
 28  * @requires vm.gc.Shenandoah
 29  *
 30  * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 31  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 32  *      -XX:+ShenandoahVerify
 33  *      TestJNIGlobalRefs
 34  */
 35 
 36 /* @test id=aggressive
 37  * @summary Test JNI Global Refs with Shenandoah
 38  * @requires vm.gc.Shenandoah
 39  *
 40  * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 41  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 42  *      TestJNIGlobalRefs
 43  */
 44 
 45 /* @test id=generational-verify
 46  * @summary Test JNI Global Refs with Shenandoah
 47  * @requires vm.gc.Shenandoah
 48  *
 49  * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 50  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
 51  *      -XX:+ShenandoahVerify
 52  *      TestJNIGlobalRefs
 53  */
 54 
 55 /* @test id=generational
 56  * @summary Test JNI Global Refs with Shenandoah
 57  * @requires vm.gc.Shenandoah
 58  *
 59  * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 60  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
 61  *      TestJNIGlobalRefs
 62  */
 63 
 64 import java.util.Arrays;
 65 import java.util.Random;
 66 
 67 public class TestJNIGlobalRefs {
 68     static {
 69         System.loadLibrary("TestJNIGlobalRefs");
 70     }
 71 
 72     private static final long TIME_NSEC = 120L * 1_000_000_000L;
 73     private static final int ARRAY_SIZE = 10000;
 74 
 75     private static native void makeGlobalRef(Object o);
 76     private static native void makeWeakGlobalRef(Object o);
 77     private static native Object readGlobalRef();
 78     private static native Object readWeakGlobalRef();
 79 
 80     public static void main(String[] args) throws Throwable {
 81         seedGlobalRef();
 82         seedWeakGlobalRef();
 83         long startNanos = System.nanoTime();
 84         long currentNanos = startNanos;
 85         while (currentNanos - startNanos < TIME_NSEC) {
 86             testGlobal();
 87             testWeakGlobal();
 88             Thread.sleep(1);
 89             currentNanos = System.nanoTime();
 90         }
 91     }
 92 
 93     private static void seedGlobalRef() {
 94         int[] a = new int[ARRAY_SIZE];
 95         fillArray(a, 1337);
 96         makeGlobalRef(a);
 97     }
 98 
 99     private static void seedWeakGlobalRef() {
100         int[] a = new int[ARRAY_SIZE];
101         fillArray(a, 8080);
102         makeWeakGlobalRef(a);
103     }
104 
105     private static void testGlobal() {
106         int[] a = (int[]) readGlobalRef();
107         checkArray(a, 1337);
108     }
109 
110     private static void testWeakGlobal() {
111         int[] a = (int[]) readWeakGlobalRef();
112         if (a != null) {
113             checkArray(a, 8080);
114         } else {
115             // weak reference is cleaned, recreate:
116             seedWeakGlobalRef();
117         }
118     }
119 
120     private static void fillArray(int[] array, int seed) {
121         Random r = new Random(seed);
122         for (int i = 0; i < ARRAY_SIZE; i++) {
123             array[i] = r.nextInt();
124         }
125     }
126 
127     private static void checkArray(int[] array, int seed) {
128         Random r = new Random(seed);
129         if (array.length != ARRAY_SIZE) {
130             throw new IllegalStateException("Illegal array length: " + array.length + ", but expected " + ARRAY_SIZE);
131         }
132         for (int i = 0; i < ARRAY_SIZE; i++) {
133             int actual = array[i];
134             int expected = r.nextInt();
135             if (actual != expected) {
136                 throw new IllegalStateException("Incorrect array data: " + actual + ", but expected " + expected);
137             }
138         }
139     }
140 }