1 /*
   2  * Copyright (c) 2014, 2015, 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 org.graalvm.compiler.api.replacements.SnippetReflectionProvider;
  26 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
  27 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  28 import org.graalvm.compiler.word.WordTypes;
  29 
  30 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
  31 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
  32 import jdk.vm.ci.meta.JavaConstant;
  33 import jdk.vm.ci.meta.JavaKind;
  34 import jdk.vm.ci.meta.ResolvedJavaType;
  35 
  36 public class HotSpotSnippetReflectionProvider implements SnippetReflectionProvider {
  37 
  38     private final HotSpotGraalRuntimeProvider runtime;
  39     private final HotSpotConstantReflectionProvider constantReflection;
  40     private final WordTypes wordTypes;
  41 
  42     public HotSpotSnippetReflectionProvider(HotSpotGraalRuntimeProvider runtime, HotSpotConstantReflectionProvider constantReflection, WordTypes wordTypes) {
  43         this.runtime = runtime;
  44         this.constantReflection = constantReflection;
  45         this.wordTypes = wordTypes;
  46     }
  47 
  48     @Override
  49     public JavaConstant forObject(Object object) {
  50         return constantReflection.forObject(object);
  51     }
  52 
  53     @Override
  54     public Object asObject(ResolvedJavaType type, JavaConstant constant) {
  55         if (constant.isNull()) {
  56             return null;
  57         }
  58         HotSpotObjectConstant hsConstant = (HotSpotObjectConstant) constant;
  59         return hsConstant.asObject(type);
  60     }
  61 
  62     @Override
  63     public <T> T asObject(Class<T> type, JavaConstant constant) {
  64         if (constant.isNull()) {
  65             return null;
  66         }
  67         HotSpotObjectConstant hsConstant = (HotSpotObjectConstant) constant;
  68         return hsConstant.asObject(type);
  69     }
  70 
  71     @Override
  72     public JavaConstant forBoxed(JavaKind kind, Object value) {
  73         if (kind == JavaKind.Object) {
  74             return forObject(value);
  75         } else {
  76             return JavaConstant.forBoxedPrimitive(value);
  77         }
  78     }
  79 
  80     // Lazily initialized
  81     private Class<?> wordTypesType;
  82     private Class<?> runtimeType;
  83     private Class<?> configType;
  84 
  85     @Override
  86     public <T> T getInjectedNodeIntrinsicParameter(Class<T> type) {
  87         // Need to test all fields since there no guarantee under the JMM
  88         // about the order in which these fields are written.
  89         GraalHotSpotVMConfig config = runtime.getVMConfig();
  90         if (configType == null || wordTypesType == null || configType == null) {
  91             wordTypesType = wordTypes.getClass();
  92             runtimeType = runtime.getClass();
  93             configType = config.getClass();
  94         }
  95 
  96         if (type.isAssignableFrom(wordTypesType)) {
  97             return type.cast(wordTypes);
  98         }
  99         if (type.isAssignableFrom(runtimeType)) {
 100             return type.cast(runtime);
 101         }
 102         if (type.isAssignableFrom(configType)) {
 103             return type.cast(config);
 104         }
 105         return null;
 106     }
 107 }