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