| /* |
| * Copyright (c) 2015, 2016, 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 org.graalvm.compiler.hotspot; |
| |
| import static jdk.vm.ci.hotspot.HotSpotCompressedNullConstant.COMPRESSED_NULL; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.graalvm.compiler.code.DataSection.Data; |
| import org.graalvm.compiler.code.DataSection.Patches; |
| import org.graalvm.compiler.code.DataSection.SerializableData; |
| import org.graalvm.compiler.code.DataSection.ZeroData; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.lir.asm.DataBuilder; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.hotspot.HotSpotConstant; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.SerializableConstant; |
| import jdk.vm.ci.meta.VMConstant; |
| |
| public class HotSpotDataBuilder extends DataBuilder { |
| |
| private final TargetDescription target; |
| |
| public HotSpotDataBuilder(TargetDescription target) { |
| this.target = target; |
| } |
| |
| @Override |
| public boolean needDetailedPatchingInformation() { |
| /* The HotSpot VM finds operands that need patching by decoding the instruction. */ |
| return false; |
| } |
| |
| @Override |
| public Data createDataItem(Constant constant) { |
| int size; |
| if (constant instanceof VMConstant) { |
| VMConstant vmConstant = (VMConstant) constant; |
| boolean compressed; |
| if (constant instanceof HotSpotConstant) { |
| HotSpotConstant c = (HotSpotConstant) vmConstant; |
| compressed = c.isCompressed(); |
| } else { |
| throw new GraalError(String.valueOf(constant)); |
| } |
| |
| size = compressed ? 4 : target.wordSize; |
| if (size == 4) { |
| return new Data(size, size) { |
| |
| @Override |
| protected void emit(ByteBuffer buffer, Patches patches) { |
| patches.registerPatch(vmConstant); |
| buffer.putInt(0xDEADDEAD); |
| } |
| }; |
| } else { |
| return new Data(size, size) { |
| |
| @Override |
| protected void emit(ByteBuffer buffer, Patches patches) { |
| patches.registerPatch(vmConstant); |
| buffer.putLong(0xDEADDEADDEADDEADL); |
| } |
| }; |
| } |
| } else if (JavaConstant.isNull(constant)) { |
| boolean compressed = COMPRESSED_NULL.equals(constant); |
| size = compressed ? 4 : target.wordSize; |
| return ZeroData.create(size, size); |
| } else if (constant instanceof SerializableConstant) { |
| SerializableConstant s = (SerializableConstant) constant; |
| return new SerializableData(s); |
| } else { |
| throw new GraalError(String.valueOf(constant)); |
| } |
| } |
| } |