| /* |
| * 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 TestRefprocSanity |
| * @summary Test that null references/referents work fine |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC |
| * -XX:+ShenandoahVerify |
| * TestRefprocSanity |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC |
| * TestRefprocSanity |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive |
| * TestRefprocSanity |
| */ |
| |
| /* |
| * @test TestRefprocSanity |
| * @summary Test that null references/referents work fine |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu |
| * -XX:+ShenandoahVerify |
| * TestRefprocSanity |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu |
| * TestRefprocSanity |
| * |
| * @run main/othervm -Xmx128m -Xms128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions |
| * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive |
| * TestRefprocSanity |
| */ |
| |
| import java.lang.ref.*; |
| |
| public class TestRefprocSanity { |
| |
| static final long TARGET_MB = Long.getLong("target", 1_000); // 1 Gb allocation |
| static final int WINDOW = 1_000; |
| |
| static final Reference<MyObject>[] refs = new Reference[WINDOW]; |
| |
| static Object sink; |
| |
| public static void main(String[] args) throws Exception { |
| long count = TARGET_MB * 1024 * 1024 / 128; |
| int rIdx = 0; |
| |
| ReferenceQueue rq = new ReferenceQueue(); |
| |
| for (int c = 0; c < WINDOW; c++) { |
| refs[c] = select(c, new MyObject(c), rq); |
| } |
| |
| for (int c = 0; c < count; c++) { |
| verifyRefAt(rIdx); |
| refs[rIdx] = select(c, new MyObject(rIdx), rq); |
| |
| rIdx++; |
| if (rIdx >= WINDOW) { |
| rIdx = 0; |
| } |
| |
| // Do allocations to force GCs |
| sink = new byte[100]; |
| |
| // Drain the refqueue |
| while (rq.poll() != null); |
| } |
| } |
| |
| static Reference<MyObject> select(int v, MyObject ext, ReferenceQueue rq) { |
| switch (v % 10) { |
| case 0: return new SoftReference<MyObject>(null); |
| case 1: return new SoftReference<MyObject>(null, rq); |
| case 2: return new SoftReference<MyObject>(ext); |
| case 3: return new SoftReference<MyObject>(ext, rq); |
| case 4: return new WeakReference<MyObject>(null); |
| case 5: return new WeakReference<MyObject>(null, rq); |
| case 6: return new WeakReference<MyObject>(ext); |
| case 7: return new WeakReference<MyObject>(ext, rq); |
| case 8: return new PhantomReference<MyObject>(null, rq); |
| case 9: return new PhantomReference<MyObject>(ext, rq); |
| default: throw new IllegalStateException(); |
| } |
| } |
| |
| static void verifyRefAt(int idx) { |
| Reference<MyObject> ref = refs[idx]; |
| MyObject mo = ref.get(); |
| if (mo != null && mo.x != idx) { |
| throw new IllegalStateException("Referent tag is incorrect: " + mo.x + ", should be " + idx); |
| } |
| } |
| |
| static class MyObject { |
| final int x; |
| |
| public MyObject(int x) { |
| this.x = x; |
| } |
| } |
| |
| } |