1 /*
2  * Copyright (c) 2014, 2018, 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
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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
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22  */
23 
24 
25 package org.graalvm.compiler.hotspot.meta;
26 
27 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime;
28 
29 import org.graalvm.compiler.api.replacements.SnippetReflectionProvider;
30 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
31 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
32 import org.graalvm.compiler.word.WordTypes;
33 
34 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
35 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
36 import jdk.vm.ci.meta.JavaConstant;
37 import jdk.vm.ci.meta.JavaKind;
38 import jdk.vm.ci.meta.ResolvedJavaType;
39 
40 public class HotSpotSnippetReflectionProvider implements SnippetReflectionProvider {
41 
42     private final HotSpotGraalRuntimeProvider runtime;
43     private final HotSpotConstantReflectionProvider constantReflection;
44     private final WordTypes wordTypes;
45 
HotSpotSnippetReflectionProvider(HotSpotGraalRuntimeProvider runtime, HotSpotConstantReflectionProvider constantReflection, WordTypes wordTypes)46     public HotSpotSnippetReflectionProvider(HotSpotGraalRuntimeProvider runtime, HotSpotConstantReflectionProvider constantReflection, WordTypes wordTypes) {
47         this.runtime = runtime;
48         this.constantReflection = constantReflection;
49         this.wordTypes = wordTypes;
50     }
51 
52     @Override
forObject(Object object)53     public JavaConstant forObject(Object object) {
54         return constantReflection.forObject(object);
55     }
56 
57     @Override
asObject(Class<T> type, JavaConstant constant)58     public <T> T asObject(Class<T> type, JavaConstant constant) {
59         if (constant.isNull()) {
60             return null;
61         }
62         if (constant instanceof HotSpotObjectConstant) {
63             HotSpotObjectConstant hsConstant = (HotSpotObjectConstant) constant;
64             return hsConstant.asObject(type);
65         }
66         return null;
67     }
68 
69     @Override
forBoxed(JavaKind kind, Object value)70     public JavaConstant forBoxed(JavaKind kind, Object value) {
71         if (kind == JavaKind.Object) {
72             return forObject(value);
73         } else {
74             return JavaConstant.forBoxedPrimitive(value);
75         }
76     }
77 
78     // Lazily initialized
79     private Class<?> wordTypesType;
80     private Class<?> runtimeType;
81     private Class<?> configType;
82 
83     @Override
getInjectedNodeIntrinsicParameter(Class<T> type)84     public <T> T getInjectedNodeIntrinsicParameter(Class<T> type) {
85         // Need to test all fields since there no guarantee under the JMM
86         // about the order in which these fields are written.
87         GraalHotSpotVMConfig config = runtime.getVMConfig();
88         if (configType == null || wordTypesType == null || runtimeType == null) {
89             wordTypesType = wordTypes.getClass();
90             runtimeType = runtime.getClass();
91             configType = config.getClass();
92         }
93 
94         if (type.isAssignableFrom(wordTypesType)) {
95             return type.cast(wordTypes);
96         }
97         if (type.isAssignableFrom(runtimeType)) {
98             return type.cast(runtime);
99         }
100         if (type.isAssignableFrom(configType)) {
101             return type.cast(config);
102         }
103         return null;
104     }
105 
106     @Override
originalClass(ResolvedJavaType type)107     public Class<?> originalClass(ResolvedJavaType type) {
108         return runtime().getMirror(type);
109     }
110 }
111