1 /*

     2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * @test TestObjects

    26  * @key gc

    27  * @requires vm.gc.Epsilon

    28  * @summary Epsilon is able to allocate objects, and does not corrupt their state

    29  *

    30  * @run main/othervm -Xmx128m                                        -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    31  * @run main/othervm -Xmx128m -Xint                                  -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    32  * @run main/othervm -Xmx128m -Xbatch -Xcomp                         -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    33  * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    34  * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:-TieredCompilation  -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    35  *

    36  * @run main/othervm -Xmx128m                                        -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    37  * @run main/othervm -Xmx128m -Xint                                  -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    38  * @run main/othervm -Xmx128m -Xbatch -Xcomp                         -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    39  * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    40  * @run main/othervm -Xmx128m -Xbatch -Xcomp -XX:-TieredCompilation  -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestObjects

    41  */

    42 

    43 import java.util.Random;

    44 

    45 public class TestObjects {

    46 

    47   static long SEED = Long.getLong("seed", System.nanoTime());

    48   static int COUNT = Integer.getInteger("count", 1_000_000); // ~24 MB allocation

    49 

    50   static MyObject[] arr;

    51 

    52   public static void main(String[] args) throws Exception {

    53     Random r = new Random(SEED);

    54 

    55     arr = new MyObject[COUNT];

    56     for (int c = 0; c < COUNT; c++) {

    57       arr[c] = new MyObject(r.nextInt());

    58     }

    59 

    60     r = new Random(SEED);

    61     for (int c = 0; c < COUNT; c++) {

    62       int expected = r.nextInt();

    63       int actual = arr[c].id();

    64       if (expected != actual) {

    65         throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);

    66       }

    67     }

    68   }

    69 

    70   public static class MyObject {

    71     int id;

    72     public MyObject(int id) {

    73       this.id = id;

    74     }

    75     public int id() {

    76       return id;

    77     }

    78   }

    79 }