1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot.meta; 24 25 import static org.graalvm.compiler.serviceprovider.JDK9Method.Java8OrEarlier; 26 27 import org.graalvm.compiler.api.replacements.ClassSubstitution; 28 import org.graalvm.compiler.api.replacements.MethodSubstitution; 29 import org.graalvm.compiler.hotspot.HotSpotBackend; 30 import org.graalvm.compiler.hotspot.nodes.ComputeObjectAddressNode; 31 import org.graalvm.compiler.word.Word; 32 import org.graalvm.word.WordFactory; 33 34 @ClassSubstitution(className = {"jdk.internal.misc.Unsafe", "sun.misc.Unsafe"}) 35 public class HotSpotUnsafeSubstitutions { 36 37 public static final String copyMemoryName = Java8OrEarlier ? "copyMemory" : "copyMemory0"; 38 39 @SuppressWarnings("unused") 40 @MethodSubstitution(isStatic = false) 41 static void copyMemory(Object receiver, Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes) { 42 Word srcAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(srcBase, srcOffset)); 43 Word dstAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(destBase, destOffset)); 44 Word size = Word.signed(bytes); 45 HotSpotBackend.unsafeArraycopy(srcAddr, dstAddr, size); 46 } 47 }