jdk

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/*
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 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package gc.epsilon;
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/**
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 * @test TestObjects
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 * @key randomness
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 * @requires vm.gc.Epsilon
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 * @summary Epsilon is able to allocate objects, and does not corrupt their state
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 * @library /test/lib
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 *
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 * @run main/othervm -XX:+UseTLAB -Xmx256m
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:+UseTLAB -Xmx256m
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 *                   -Xint
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:+UseTLAB -Xmx256m
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 *                   -Xbatch -Xcomp -XX:TieredStopAtLevel=1
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:+UseTLAB -Xmx256m
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 *                   -Xbatch -Xcomp -XX:-TieredCompilation
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:-UseTLAB -Xmx256m
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:-UseTLAB -Xmx256m
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 *                   -Xint
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:-UseTLAB -Xmx256m
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 *                   -Xbatch -Xcomp -XX:TieredStopAtLevel=1
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 *
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 * @run main/othervm -XX:-UseTLAB -Xmx256m
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 *                   -Xbatch -Xcomp -XX:-TieredCompilation
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 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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 *                   gc.epsilon.TestObjects
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 */
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import java.util.Random;
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import jdk.test.lib.Utils;
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public class TestObjects {
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  static int COUNT = Integer.getInteger("count", 1_000_000); // ~24 MB allocation
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  static MyObject[] arr;
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  public static void main(String[] args) throws Exception {
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    Random r = Utils.getRandomInstance();
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    arr = new MyObject[COUNT];
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    for (int c = 0; c < COUNT; c++) {
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      arr[c] = new MyObject(r.nextInt());
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    }
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    r = new Random(Utils.SEED);
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    for (int c = 0; c < COUNT; c++) {
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      int expected = r.nextInt();
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      int actual = arr[c].id();
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      if (expected != actual) {
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        throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);
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      }
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    }
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  }
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  public static class MyObject {
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    int id;
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    public MyObject(int id) {
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      this.id = id;
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    }
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    public int id() {
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      return id;
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    }
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  }
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}
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