/*

 * Copyright (c) 2016, Oracle and/or its affiliates. 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.

 *

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 */

 /*

 * @test TestG1LoggingFailure

 * @bug 8151034

 * @summary Regression test for G1 logging at OOME

 * @requires vm.gc.G1

 * @library /test/lib

 * @modules java.management

 * @build gc.g1.logging.TestG1LoggingFailure

 * @run main/timeout=300 gc.g1.logging.TestG1LoggingFailure

 */

package gc.g1.logging;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.Utils;

public class TestG1LoggingFailure {

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

        List<String> options = new ArrayList<>();

        Collections.addAll(options, Utils.getTestJavaOpts());

        Collections.addAll(options,

                "-XX:+UseG1GC",

                "-Xmx20m",

                "-Xmn10m",

                "-Xlog:gc=info",

                "-XX:G1HeapRegionSize=1m"

        );

        options.add(Alloc.class.getName());

        // According to https://bugs.openjdk.java.net/browse/JDK-8146009 failure happens not every time.

        // Will try to reproduce this failure.

        for (int iteration = 0; iteration < 40; ++iteration) {

            startVM(options);

        }

    }

    private static void startVM(List<String> options) throws Throwable, RuntimeException {

        OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()]));

        out.shouldNotContain("pure virtual method called");

        if (out.getExitValue() == 0) {

            System.out.println(out.getOutput());

            throw new RuntimeException("Expects Alloc failure.");

        }

    }

    // Simple class to be executed in separate VM.

    static class Alloc {

        public static final int CHUNK = 1024;

        public static ArrayList<Object> arr = new ArrayList<>();

        public static void main(String[] args) {

            try {

                while (true) {

                    arr.add(new byte[CHUNK]);

                }

            } catch (OutOfMemoryError oome) {

            }

            while (true) {

                arr.add(new byte[CHUNK]);

            }

        }

    }

}