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/*
* 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.
*/
package gc.epsilon;
/**
* @test TestByteArrays
* @key randomness
* @requires vm.gc.Epsilon
* @summary Epsilon is able to allocate arrays, and does not corrupt their state
* @library /test/lib
*
* @run main/othervm -XX:+UseTLAB -Xmx256m
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:+UseTLAB -Xmx256m
* -Xint
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:+UseTLAB -Xmx256m
* -Xbatch -Xcomp -XX:TieredStopAtLevel=1
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:+UseTLAB -Xmx256m
* -Xbatch -Xcomp -XX:-TieredCompilation
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:-UseTLAB -Xmx256m
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:-UseTLAB -Xmx256m
* -Xint
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:-UseTLAB -Xmx256m
* -Xbatch -Xcomp -XX:TieredStopAtLevel=1
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*
* @run main/othervm -XX:-UseTLAB -Xmx256m
* -Xbatch -Xcomp -XX:-TieredCompilation
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestByteArrays
*/
import java.util.Random;
import jdk.test.lib.Utils;
public class TestByteArrays {
static int COUNT = Integer.getInteger("count", 500); // ~100 MB allocation
static byte[][] arr;
public static void main(String[] args) throws Exception {
Random r = Utils.getRandomInstance();
arr = new byte[COUNT * 100][];
for (int c = 0; c < COUNT; c++) {
arr[c] = new byte[c * 100];
for (int v = 0; v < c; v++) {
arr[c][v] = (byte)(r.nextInt(255) & 0xFF);
}
}
r = new Random(Utils.SEED);
for (int c = 0; c < COUNT; c++) {
byte[] b = arr[c];
if (b.length != (c * 100)) {
throw new IllegalStateException("Failure: length = " + b.length + ", need = " + (c*100));
}
for (int v = 0; v < c; v++) {
byte actual = b[v];
byte expected = (byte)(r.nextInt(255) & 0xFF);
if (actual != expected) {
throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);
}
}
}
}
}
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