/*

 * Copyright 2014 SAP AG.  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

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 * questions.

 */

/**

 * @test

 * @bug 8038048

 * @summary assert(null_obj->escape_state() == PointsToNode::NoEscape,etc)

 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+DoEscapeAnalysis -XX:-TieredCompilation -Xbatch TestUnsafePutAddressNullObjMustNotEscape

 * @author Richard Reingruber richard DOT reingruber AT sap DOT com

 */

import java.lang.reflect.Field;

import sun.misc.Unsafe;

public class TestUnsafePutAddressNullObjMustNotEscape {

    public static Unsafe usafe;

    public static long mem;

    public static long checksum;

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

        System.out.println("EXECUTING test.");

        {

            System.out.println("Acquiring sun.misc.Unsafe.theUnsafe using reflection.");

            getUnsafe();

            System.out.println("Allocating raw memory.");

            mem = (usafe.allocateMemory(1024) + 8L) & ~7L;

            System.out.println("Triggering JIT compilation of the test method");

            triggerJitCompilationOfTestMethod();

        }

        System.out.println("SUCCESSFULLY passed test.");

    }

    public static void triggerJitCompilationOfTestMethod() {

        long sum = 0;

        for (int ii = 50000; ii >= 0; ii--) {

            sum = testMethod();

        }

        checksum = sum;

    }

    public static class IDGen {

        private static long id;

        public long nextId() {

            return id++;

        }

    }

    public static long testMethod() {

        // dummy alloc to trigger escape analysis

        IDGen gen = new IDGen();

        // StoreP of null_obj to raw mem triggers assertion in escape analysis

        usafe.putAddress(mem, 0L);

        return gen.nextId();

    }

    private static void getUnsafe() throws Exception {

        Field field = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");

        field.setAccessible(true);

        usafe = (sun.misc.Unsafe) field.get(null);

    }

}