/*

 * Copyright (c) 2011, 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.

 *

 * 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 jdk.vm.ci.hotspot;

import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE;

import jdk.internal.misc.Unsafe;

import jdk.vm.ci.code.InstalledCode;

/**

 * Implementation of {@link InstalledCode} for HotSpot.

 */

public abstract class HotSpotInstalledCode extends InstalledCode {

    /**

     * Total size of the code blob.

     */

    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int size;

    /**

     * Start address of the code.

     */

    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private long codeStart;

    /**

     * Size of the code.

     */

    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int codeSize;

    public HotSpotInstalledCode(String name) {

        super(name);

    }

    /**

     * @return the total size of this code blob

     */

    public int getSize() {

        return size;

    }

    @Override

    public abstract String toString();

    @Override

    public long getStart() {

        return codeStart;

    }

    public long getCodeSize() {

        return codeSize;

    }

    @Override

    public byte[] getCode() {

        if (!isValid()) {

            return null;

        }

        byte[] code = new byte[codeSize];

        UNSAFE.copyMemory(null, codeStart, code, Unsafe.ARRAY_BYTE_BASE_OFFSET, codeSize);

        return code;

    }

}