/*

 * Copyright (c) 2017, 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.

 *

 * 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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package org.graalvm.compiler.hotspot.meta;

import org.graalvm.compiler.api.replacements.ClassSubstitution;

import org.graalvm.compiler.api.replacements.MethodSubstitution;

import org.graalvm.compiler.hotspot.HotSpotBackend;

import org.graalvm.compiler.nodes.ComputeObjectAddressNode;

import org.graalvm.compiler.word.Word;

import jdk.internal.vm.compiler.word.WordFactory;

@ClassSubstitution(className = {"jdk.internal.misc.Unsafe", "sun.misc.Unsafe"})

public class HotSpotUnsafeSubstitutions {

    @SuppressWarnings("unused")

    @MethodSubstitution(isStatic = false)

    static void copyMemory(Object receiver, Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes) {

        Word srcAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(srcBase, srcOffset));

        Word dstAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(destBase, destOffset));

        Word size = WordFactory.signed(bytes);

        HotSpotBackend.unsafeArraycopy(srcAddr, dstAddr, size);

    }

}