1 /* 2 * Copyright (c) 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 TestPinnedGarbage 26 * @summary Test that garbage in the pinned region does not crash VM 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 -Xmx512m 32 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 33 * -XX:+ShenandoahVerify -XX:+ShenandoahDegeneratedGC 34 * TestPinnedGarbage 35 * 36 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx512m 37 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 38 * -XX:+ShenandoahVerify -XX:-ShenandoahDegeneratedGC 39 * TestPinnedGarbage 40 */ 41 42 /* @test TestPinnedGarbage 43 * @summary Test that garbage in the pinned region does not crash VM 44 * @key randomness 45 * @requires vm.gc.Shenandoah & !vm.graal.enabled 46 * @library /test/lib 47 * 48 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx512m 49 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 50 * TestPinnedGarbage 51 * 52 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx512m 53 * -XX:+UseShenandoahGC 54 * -XX:+ShenandoahVerify 55 * TestPinnedGarbage 56 */ 57 58 import java.util.Arrays; 59 import java.util.Random; 60 import jdk.test.lib.Utils; 61 62 public class TestPinnedGarbage { 63 static { 64 System.loadLibrary("TestPinnedGarbage"); 65 } 66 67 private static final int NUM_RUNS = 1_000; 68 private static final int OBJS_COUNT = 1_000; 69 private static final int GARBAGE_COUNT = 1_000_000; 70 71 private static native void pin(int[] a); 72 private static native void unpin(int[] a); 73 74 public static void main(String[] args) { 75 for (int i = 0; i < NUM_RUNS; i++) { 76 test(); 77 } 78 } 79 80 private static void test() { 81 Object[] objs = new Object[OBJS_COUNT]; 82 for (int i = 0; i < OBJS_COUNT; i++) { 83 objs[i] = new MyClass(); 84 } 85 86 int[] cog = new int[10]; 87 Random rng = Utils.getRandomInstance(); 88 int cogIdx = rng.nextInt(OBJS_COUNT); 89 objs[cogIdx] = cog; 90 pin(cog); 91 92 for (int i = 0; i < GARBAGE_COUNT; i++) { 93 int rIdx = rng.nextInt(OBJS_COUNT); 94 if (rIdx != cogIdx) { 95 objs[rIdx] = new MyClass(); 96 } 97 } 98 99 unpin(cog); 100 } 101 102 public static class MyClass { 103 public Object ref = new Object(); 104 } 105 106 }