| /* |
| * Copyright (c) 2018, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /* @test TestPinnedGarbage |
| * @summary Test that garbage in the pinned region does not crash VM |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * |
| * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive |
| * -XX:+ShenandoahVerify -XX:+ShenandoahDegeneratedGC |
| * TestPinnedGarbage |
| * |
| * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive |
| * -XX:+ShenandoahVerify -XX:-ShenandoahDegeneratedGC |
| * TestPinnedGarbage |
| */ |
| |
| /* @test TestPinnedGarbage |
| * @summary Test that garbage in the pinned region does not crash VM |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * |
| * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive |
| * TestPinnedGarbage |
| * |
| * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m |
| * -XX:+UseShenandoahGC |
| * -XX:+ShenandoahVerify |
| * TestPinnedGarbage |
| */ |
| |
| import java.util.Arrays; |
| import java.util.concurrent.*; |
| |
| public class TestPinnedGarbage { |
| static { |
| System.loadLibrary("TestPinnedGarbage"); |
| } |
| |
| private static final int NUM_RUNS = 1_000; |
| private static final int OBJS_COUNT = 1 << 10; |
| private static final int GARBAGE_COUNT = 1 << 18; |
| |
| private static native void pin(int[] a); |
| private static native void unpin(int[] a); |
| |
| public static void main(String[] args) { |
| ThreadLocalRandom rng = ThreadLocalRandom.current(); |
| for (int i = 0; i < NUM_RUNS; i++) { |
| test(rng); |
| } |
| } |
| |
| private static void test(ThreadLocalRandom rng) { |
| Object[] objs = new Object[OBJS_COUNT]; |
| for (int i = 0; i < OBJS_COUNT; i++) { |
| objs[i] = new MyClass(); |
| } |
| |
| int[] cog = new int[10]; |
| int cogIdx = rng.nextInt(OBJS_COUNT); |
| objs[cogIdx] = cog; |
| pin(cog); |
| |
| for (int i = 0; i < GARBAGE_COUNT; i++) { |
| int rIdx = rng.nextInt(OBJS_COUNT); |
| if (rIdx != cogIdx) { |
| objs[rIdx] = new MyClass(); |
| } |
| } |
| |
| unpin(cog); |
| } |
| |
| public static class MyClass { |
| public Object ref = new Object(); |
| } |
| |
| } |