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 25 * @summary Test that garbage in the pinned region does not crash VM 26 * 27 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx512m -XX:+ShenandoahVerify -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC PinnedGarbage 28 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx512m -XX:+ShenandoahVerify -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC PinnedGarbage 29 * 30 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx512m -XX:ShenandoahGCHeuristics=aggressive PinnedGarbage 31 * 32 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx512m -XX:+ShenandoahVerify PinnedGarbage 33 */ 34 35 import java.util.Arrays; 36 import java.util.concurrent.*; 37 38 public class PinnedGarbage { 39 static { 40 System.loadLibrary("PinnedGarbage"); 41 } 42 43 private static final int NUM_RUNS = 1_000; 44 private static final int OBJS_COUNT = 1_000; 45 private static final int GARBAGE_COUNT = 1_000_000; 46 47 private static native void pin(int[] a); 48 private static native void unpin(int[] a); 49 50 public static void main(String[] args) { 51 for (int i = 0; i < NUM_RUNS; i++) { 52 test(); 53 } 54 } 55 56 private static void test() { 57 Object[] objs = new Object[OBJS_COUNT]; 58 for (int i = 0; i < OBJS_COUNT; i++) { 59 objs[i] = new MyClass(); 60 } 61 62 int[] cog = new int[10]; 63 int cogIdx = ThreadLocalRandom.current().nextInt(OBJS_COUNT); 64 objs[cogIdx] = cog; 65 pin(cog); 66 67 for (int i = 0; i < GARBAGE_COUNT; i++) { 68 int rIdx = ThreadLocalRandom.current().nextInt(OBJS_COUNT); 69 if (rIdx != cogIdx) { 70 objs[rIdx] = new MyClass(); 71 } 72 } 73 74 unpin(cog); 75 } 76 77 public static class MyClass { 78 public Object ref = new Object(); 79 } 80 81 }