1 /*
   2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
   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 TestByteArrays
  26  * @summary Epsilon is able to allocate arrays, and does not corrupt their state
  27  *
  28  * @run main/othervm -Xmx1g                                        -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  29  * @run main/othervm -Xmx1g -Xint                                  -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  30  * @run main/othervm -Xmx1g -Xbatch -Xcomp                         -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  31  * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  32  * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=4 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  33  *
  34  * @run main/othervm -Xmx1g                                        -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  35  * @run main/othervm -Xmx1g -Xint                                  -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  36  * @run main/othervm -Xmx1g -Xbatch -Xcomp                         -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  37  * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  38  * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=4 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC TestByteArrays
  39  */
  40 
  41 import java.util.Random;
  42 
  43 public class TestByteArrays extends AbstractEpsilonTest {
  44 
  45   static long SEED = Long.getLong("seed", System.nanoTime());
  46   static int COUNT = Integer.getInteger("count", 3000); // ~500 MB allocation
  47 
  48   static byte[][] arr;
  49 
  50   public static void main(String[] args) throws Exception {
  51     if (!isEpsilonEnabled()) return;
  52 
  53     Random r = new Random(SEED);
  54 
  55     arr = new byte[COUNT * 100][];
  56     for (int c = 0; c < COUNT; c++) {
  57       arr[c] = new byte[c * 100];
  58       for (int v = 0; v < c; v++) {
  59         arr[c][v] = (byte)(r.nextInt(255) & 0xFF);
  60       }
  61     }
  62 
  63     r = new Random(SEED);
  64     for (int c = 0; c < COUNT; c++) {
  65       byte[] b = arr[c];
  66       if (b.length != (c * 100)) {
  67         throw new IllegalStateException("Failure: length = " + b.length + ", need = " + (c*100));
  68       }
  69       for (int v = 0; v < c; v++) {
  70         byte actual = b[v];
  71         byte expected = (byte)(r.nextInt(255) & 0xFF);
  72         if (actual != expected) {
  73           throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);
  74         }
  75       }
  76     }
  77   }
  78 }