Mercurial > hg > graal-jvmci-8
comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMethodHandleAccessProvider.java @ 22672:1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 08 Oct 2015 17:28:41 -0700 |
parents | jvmci/jdk.internal.jvmci.hotspot/src/jdk/internal/jvmci/hotspot/HotSpotMethodHandleAccessProvider.java@232c53e17ea0 |
children | 56479400913e |
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22671:97f30e4d0e95 | 22672:1bbd4a7c274b |
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1 /* | |
2 * Copyright (c) 2014, 2014, 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 jdk.vm.ci.hotspot; | |
24 | |
25 import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; | |
26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; | |
27 import static jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl.fromObjectClass; | |
28 import jdk.vm.ci.common.JVMCIError; | |
29 import jdk.vm.ci.meta.ConstantReflectionProvider; | |
30 import jdk.vm.ci.meta.JavaConstant; | |
31 import jdk.vm.ci.meta.MethodHandleAccessProvider; | |
32 import jdk.vm.ci.meta.ResolvedJavaField; | |
33 import jdk.vm.ci.meta.ResolvedJavaMethod; | |
34 import jdk.vm.ci.meta.ResolvedJavaType; | |
35 | |
36 public class HotSpotMethodHandleAccessProvider implements MethodHandleAccessProvider, HotSpotProxified { | |
37 | |
38 private final ConstantReflectionProvider constantReflection; | |
39 | |
40 public HotSpotMethodHandleAccessProvider(ConstantReflectionProvider constantReflection) { | |
41 this.constantReflection = constantReflection; | |
42 } | |
43 | |
44 /** | |
45 * Lazy initialization to break class initialization cycle. Field and method lookup is only | |
46 * possible after the {@link HotSpotJVMCIRuntime} is fully initialized. | |
47 */ | |
48 static class LazyInitialization { | |
49 static final ResolvedJavaField methodHandleFormField; | |
50 static final ResolvedJavaField lambdaFormVmentryField; | |
51 static final ResolvedJavaMethod lambdaFormCompileToBytecodeMethod; | |
52 static final HotSpotResolvedJavaField memberNameVmtargetField; | |
53 | |
54 /** | |
55 * Search for an instance field with the given name in a class. | |
56 * | |
57 * @param className name of the class to search in | |
58 * @param fieldName name of the field to be searched | |
59 * @return resolved java field | |
60 * @throws ClassNotFoundException | |
61 */ | |
62 private static ResolvedJavaField findFieldInClass(String className, String fieldName) throws ClassNotFoundException { | |
63 Class<?> clazz = Class.forName(className); | |
64 ResolvedJavaType type = runtime().fromClass(clazz); | |
65 ResolvedJavaField[] fields = type.getInstanceFields(false); | |
66 for (ResolvedJavaField field : fields) { | |
67 if (field.getName().equals(fieldName)) { | |
68 return field; | |
69 } | |
70 } | |
71 return null; | |
72 } | |
73 | |
74 private static ResolvedJavaMethod findMethodInClass(String className, String methodName) throws ClassNotFoundException { | |
75 Class<?> clazz = Class.forName(className); | |
76 HotSpotResolvedObjectTypeImpl type = fromObjectClass(clazz); | |
77 ResolvedJavaMethod result = null; | |
78 for (ResolvedJavaMethod method : type.getDeclaredMethods()) { | |
79 if (method.getName().equals(methodName)) { | |
80 assert result == null : "more than one method found: " + className + "." + methodName; | |
81 result = method; | |
82 } | |
83 } | |
84 assert result != null : "method not found: " + className + "." + methodName; | |
85 return result; | |
86 } | |
87 | |
88 static { | |
89 try { | |
90 methodHandleFormField = findFieldInClass("java.lang.invoke.MethodHandle", "form"); | |
91 lambdaFormVmentryField = findFieldInClass("java.lang.invoke.LambdaForm", "vmentry"); | |
92 lambdaFormCompileToBytecodeMethod = findMethodInClass("java.lang.invoke.LambdaForm", "compileToBytecode"); | |
93 memberNameVmtargetField = (HotSpotResolvedJavaField) findFieldInClass("java.lang.invoke.MemberName", "vmtarget"); | |
94 } catch (Throwable ex) { | |
95 throw new JVMCIError(ex); | |
96 } | |
97 } | |
98 } | |
99 | |
100 @Override | |
101 public IntrinsicMethod lookupMethodHandleIntrinsic(ResolvedJavaMethod method) { | |
102 int intrinsicId = ((HotSpotResolvedJavaMethodImpl) method).intrinsicId(); | |
103 if (intrinsicId != 0) { | |
104 return getMethodHandleIntrinsic(intrinsicId); | |
105 } | |
106 return null; | |
107 } | |
108 | |
109 public static IntrinsicMethod getMethodHandleIntrinsic(int intrinsicId) { | |
110 HotSpotVMConfig config = runtime().getConfig(); | |
111 if (intrinsicId == config.vmIntrinsicInvokeBasic) { | |
112 return IntrinsicMethod.INVOKE_BASIC; | |
113 } else if (intrinsicId == config.vmIntrinsicLinkToInterface) { | |
114 return IntrinsicMethod.LINK_TO_INTERFACE; | |
115 } else if (intrinsicId == config.vmIntrinsicLinkToSpecial) { | |
116 return IntrinsicMethod.LINK_TO_SPECIAL; | |
117 } else if (intrinsicId == config.vmIntrinsicLinkToStatic) { | |
118 return IntrinsicMethod.LINK_TO_STATIC; | |
119 } else if (intrinsicId == config.vmIntrinsicLinkToVirtual) { | |
120 return IntrinsicMethod.LINK_TO_VIRTUAL; | |
121 } | |
122 return null; | |
123 } | |
124 | |
125 @Override | |
126 public ResolvedJavaMethod resolveInvokeBasicTarget(JavaConstant methodHandle, boolean forceBytecodeGeneration) { | |
127 if (methodHandle.isNull()) { | |
128 return null; | |
129 } | |
130 | |
131 /* Load non-public field: LambdaForm MethodHandle.form */ | |
132 JavaConstant lambdaForm = constantReflection.readFieldValue(LazyInitialization.methodHandleFormField, methodHandle); | |
133 if (lambdaForm.isNull()) { | |
134 return null; | |
135 } | |
136 | |
137 JavaConstant memberName; | |
138 if (forceBytecodeGeneration) { | |
139 /* Invoke non-public method: MemberName LambdaForm.compileToBytecode() */ | |
140 memberName = LazyInitialization.lambdaFormCompileToBytecodeMethod.invoke(lambdaForm, new JavaConstant[0]); | |
141 } else { | |
142 /* Load non-public field: MemberName LambdaForm.vmentry */ | |
143 memberName = constantReflection.readFieldValue(LazyInitialization.lambdaFormVmentryField, lambdaForm); | |
144 } | |
145 return getTargetMethod(memberName); | |
146 } | |
147 | |
148 @Override | |
149 public ResolvedJavaMethod resolveLinkToTarget(JavaConstant memberName) { | |
150 return getTargetMethod(memberName); | |
151 } | |
152 | |
153 /** | |
154 * Returns the {@link ResolvedJavaMethod} for the vmtarget of a java.lang.invoke.MemberName. | |
155 */ | |
156 private static ResolvedJavaMethod getTargetMethod(JavaConstant memberName) { | |
157 if (memberName.isNull()) { | |
158 return null; | |
159 } | |
160 | |
161 Object object = ((HotSpotObjectConstantImpl) memberName).object(); | |
162 /* Read the ResolvedJavaMethod from the injected field MemberName.vmtarget */ | |
163 return compilerToVM().getResolvedJavaMethod(object, LazyInitialization.memberNameVmtargetField.offset()); | |
164 } | |
165 } |