1 /* 2 * Copyright (c) 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 TestJNIGlobalRefs 25 * @summary Test JNI Global Refs with Shenandoah 26 * @key gc 27 * @requires vm.gc.Shenandoah & !vm.graal.enabled 28 * 29 * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 30 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 31 * -XX:+ShenandoahVerify 32 * TestJNIGlobalRefs 33 */ 34 35 /* @test TestJNIGlobalRefs 36 * @summary Test JNI Global Refs with Shenandoah 37 * @key gc 38 * @requires vm.gc.Shenandoah & !vm.graal.enabled 39 * 40 * @run main/othervm/native -Xmx1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 41 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 42 * TestJNIGlobalRefs 43 */ 44 45 import java.util.Arrays; 46 import java.util.Random; 47 48 public class TestJNIGlobalRefs { 49 static { 50 System.loadLibrary("TestJNIGlobalRefs"); 51 } 52 53 private static final int TIME_MSEC = 120000; 54 private static final int ARRAY_SIZE = 10000; 55 56 private static native void makeGlobalRef(Object o); 57 private static native void makeWeakGlobalRef(Object o); 58 private static native Object readGlobalRef(); 59 private static native Object readWeakGlobalRef(); 60 61 public static void main(String[] args) throws Throwable { 62 seedGlobalRef(); 63 seedWeakGlobalRef(); 64 long start = System.currentTimeMillis(); 65 long current = start; 66 while (current - start < TIME_MSEC) { 67 testGlobal(); 68 testWeakGlobal(); 69 Thread.sleep(1); 70 current = System.currentTimeMillis(); 71 } 72 } 73 74 private static void seedGlobalRef() { 75 int[] a = new int[ARRAY_SIZE]; 76 fillArray(a, 1337); 77 makeGlobalRef(a); 78 } 79 80 private static void seedWeakGlobalRef() { 81 int[] a = new int[ARRAY_SIZE]; 82 fillArray(a, 8080); 83 makeWeakGlobalRef(a); 84 } 85 86 private static void testGlobal() { 87 int[] a = (int[]) readGlobalRef(); 88 checkArray(a, 1337); 89 } 90 91 private static void testWeakGlobal() { 92 int[] a = (int[]) readWeakGlobalRef(); 93 if (a != null) { 94 checkArray(a, 8080); 95 } else { 96 // weak reference is cleaned, recreate: 97 seedWeakGlobalRef(); 98 } 99 } 100 101 private static void fillArray(int[] array, int seed) { 102 Random r = new Random(seed); 103 for (int i = 0; i < ARRAY_SIZE; i++) { 104 array[i] = r.nextInt(); 105 } 106 } 107 108 private static void checkArray(int[] array, int seed) { 109 Random r = new Random(seed); 110 if (array.length != ARRAY_SIZE) { 111 throw new IllegalStateException("Illegal array length: " + array.length + ", but expected " + ARRAY_SIZE); 112 } 113 for (int i = 0; i < ARRAY_SIZE; i++) { 114 int actual = array[i]; 115 int expected = r.nextInt(); 116 if (actual != expected) { 117 throw new IllegalStateException("Incorrect array data: " + actual + ", but expected " + expected); 118 } 119 } 120 } 121 }