| /* |
| * Copyright (c) 2012, 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.replacements; |
| |
| import static org.graalvm.compiler.hotspot.replacements.UnsafeAccess.UNSAFE; |
| import static org.graalvm.compiler.replacements.SnippetTemplate.DEFAULT_REPLACER; |
| |
| import org.graalvm.compiler.api.replacements.Fold; |
| import org.graalvm.compiler.api.replacements.Snippet; |
| import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter; |
| import org.graalvm.compiler.core.common.LocationIdentity; |
| import org.graalvm.compiler.hotspot.meta.HotSpotProviders; |
| import org.graalvm.compiler.nodes.NamedLocationIdentity; |
| import org.graalvm.compiler.nodes.debug.StringToBytesNode; |
| import org.graalvm.compiler.nodes.java.NewArrayNode; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.replacements.SnippetTemplate; |
| import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates; |
| import org.graalvm.compiler.replacements.SnippetTemplate.Arguments; |
| import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo; |
| import org.graalvm.compiler.replacements.Snippets; |
| import org.graalvm.compiler.replacements.nodes.CStringConstant; |
| import org.graalvm.compiler.word.Word; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.meta.JavaKind; |
| |
| /** |
| * The {@code StringToBytesSnippets} contains a snippet for lowering {@link StringToBytesNode}. |
| */ |
| public class StringToBytesSnippets implements Snippets { |
| |
| public static final LocationIdentity CSTRING_LOCATION = NamedLocationIdentity.immutable("CString location"); |
| |
| @Fold |
| static long arrayBaseOffset() { |
| return UNSAFE.arrayBaseOffset(char[].class); |
| } |
| |
| @Snippet |
| public static byte[] transform(@ConstantParameter String compilationTimeString) { |
| int i = compilationTimeString.length(); |
| byte[] array = (byte[]) NewArrayNode.newUninitializedArray(byte.class, i); |
| Word cArray = CStringConstant.cstring(compilationTimeString); |
| while (i-- > 0) { |
| // array[i] = cArray.readByte(i); |
| UNSAFE.putByte(array, arrayBaseOffset() + i, cArray.readByte(i, CSTRING_LOCATION)); |
| } |
| return array; |
| } |
| |
| public static class Templates extends AbstractTemplates { |
| |
| private final SnippetInfo create; |
| |
| public Templates(HotSpotProviders providers, TargetDescription target) { |
| super(providers, providers.getSnippetReflection(), target); |
| create = snippet(StringToBytesSnippets.class, "transform", NamedLocationIdentity.getArrayLocation(JavaKind.Byte)); |
| } |
| |
| public void lower(StringToBytesNode stringToBytesNode, LoweringTool tool) { |
| Arguments args = new Arguments(create, stringToBytesNode.graph().getGuardsStage(), tool.getLoweringStage()); |
| args.addConst("compilationTimeString", stringToBytesNode.getValue()); |
| SnippetTemplate template = template(args); |
| template.instantiate(providers.getMetaAccess(), stringToBytesNode, DEFAULT_REPLACER, args); |
| } |
| |
| } |
| |
| } |