/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2017 SAP SE. 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

 * @bug 8176518

 * @summary Invalid ImplicitNullChecks when heap base not protected

 *

 * @run main/othervm -XX:ObjectAlignmentInBytes=16 -XX:HeapBaseMinAddress=64g

 *      -XX:-TieredCompilation -Xbatch

 *      compiler.c2.TestNPEHeapBased

 * @requires vm.bits == "64"

 */

package compiler.c2;

public class TestNPEHeapBased {

    TestNPEHeapBased instance = null;

    int i = 0;

    public void set_i(int value) {

        instance.i = value;

    }

    static final int loop_cnt = 200000;

    public static void main(String args[]){

        TestNPEHeapBased xyz = new TestNPEHeapBased();

        xyz.instance = xyz;

        for (int x = 0; x < loop_cnt; x++) xyz.set_i(x);

        xyz.instance = null;

        try {

            xyz.set_i(0);

        } catch (NullPointerException npe) {

            System.out.println("Got expected NullPointerException:");

            npe.printStackTrace();

            return;

        }

        throw new InternalError("NullPointerException is missing!");

    }

}