--- /dev/null 2018-05-14 10:08:09.016338956 +0200 +++ new/test/hotspot/jtreg/gc/epsilon/TestObjects.java 2018-05-21 15:02:21.361305912 +0200 @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * 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 TestObjects + * @key gc + * @requires vm.gc.Epsilon + * @summary Epsilon is able to allocate objects, and does not corrupt their state + * + * @run main/othervm -Xmx128m -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xint -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=4 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * + * @run main/othervm -Xmx128m -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xint -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=4 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects + */ + +import java.util.Random; + +public class TestObjects { + + static long SEED = Long.getLong("seed", System.nanoTime()); + static int COUNT = Integer.getInteger("count", 1_000_000); // ~24 MB allocation + + static MyObject[] arr; + + public static void main(String[] args) throws Exception { + Random r = new Random(SEED); + + arr = new MyObject[COUNT]; + for (int c = 0; c < COUNT; c++) { + arr[c] = new MyObject(r.nextInt()); + } + + r = new Random(SEED); + for (int c = 0; c < COUNT; c++) { + int expected = r.nextInt(); + int actual = arr[c].id(); + if (expected != actual) { + throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual); + } + } + } + + public static class MyObject { + int id; + public MyObject(int id) { + this.id = id; + } + public int id() { + return id; + } + } +}