/*

 * Copyright (c) 2018, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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,

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 *

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package jdk.jfr.event.oldobject;

import java.util.ArrayList;

import java.util.List;

import jdk.jfr.Recording;

import jdk.jfr.internal.test.WhiteBox;

import jdk.test.lib.jfr.EventNames;

/*

 * @test

 * @key jfr

 * @requires vm.gc == "null"

 * @library /test/lib /test/jdk

 * @modules jdk.jfr/jdk.jfr.internal.test

 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestHeapShallow

 */

public class TestHeapShallow {

    private final static long LARGE_OBJECT_FACTOR = 509; // prime number

    static class LeakObject {

        Object object = null;

        public LeakObject(Object object) {

            this.object = object;

        }

    }

    public static ArrayList<LeakObject> leak =  new ArrayList<>(OldObjects.MIN_SIZE);

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

        WhiteBox.setWriteAllObjectSamples(true);

        try (Recording recording = new Recording()) {

            recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");

            recording.start();

            addObjectsToShallowArray(leak);

            recording.stop();

            if (OldObjects.countMatchingEvents(recording, "addObjectsToShallowArray", byte[].class, "object", LeakObject.class, -1) < 1) {

                throw new Exception("Could not find shallow leak object");

            }

        }

    }

    private static void addObjectsToShallowArray(List<LeakObject> list) {

        for (int i = 0; i < OldObjects.MIN_SIZE; i++) {

            if (i % LARGE_OBJECT_FACTOR == 0) {

                // Triggers allocation outside TLAB path

                list.add(new LeakObject(new byte[16384]));

            } else {

                // Triggers allocation in TLAB path

                list.add(new LeakObject(new byte[10]));

            }

        }

    }

}