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 }