Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/jdi/ArrayTypeImpl.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | 4ca6dc0799b6 |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2004, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.jdi; | |
26 | |
14909 | 27 import com.sun.jdi.*; |
0 | 28 |
29 import sun.jvm.hotspot.oops.ArrayKlass; | |
30 import sun.jvm.hotspot.oops.InstanceKlass; | |
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31 import sun.jvm.hotspot.oops.ObjArrayKlass; |
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32 import sun.jvm.hotspot.oops.TypeArrayKlass; |
14909 | 33 import sun.jvm.hotspot.oops.Klass; |
34 import sun.jvm.hotspot.oops.Instance; | |
35 import sun.jvm.hotspot.oops.Symbol; | |
36 import java.util.List; | |
37 import java.util.ArrayList; | |
38 import java.util.Iterator; | |
39 import java.util.Map; | |
0 | 40 |
41 public class ArrayTypeImpl extends ReferenceTypeImpl implements ArrayType { | |
42 protected ArrayTypeImpl(VirtualMachine aVm, ArrayKlass aRef) { | |
43 super(aVm, aRef); | |
44 } | |
45 | |
46 public ArrayReference newInstance(int length) { | |
47 vm.throwNotReadOnlyException("ArrayType.newInstance(int)"); | |
48 return null; | |
49 } | |
50 | |
51 public String componentSignature() { | |
52 return signature().substring(1); // Just skip the leading '[' | |
53 } | |
54 | |
55 public String componentTypeName() { | |
56 JNITypeParser parser = new JNITypeParser(componentSignature()); | |
57 return parser.typeName(); | |
58 } | |
59 | |
60 public ClassLoaderReference classLoader() { | |
61 if (ref() instanceof TypeArrayKlass) { | |
62 // primitive array klasses are loaded by bootstrap loader | |
63 return null; | |
64 } else { | |
65 Klass bottomKlass = ((ObjArrayKlass)ref()).getBottomKlass(); | |
66 if (bottomKlass instanceof TypeArrayKlass) { | |
67 // multidimensional primitive array klasses are loaded by bootstrap loader | |
68 return null; | |
69 } else { | |
70 // class loader of any other obj array klass is same as the loader | |
71 // that loaded the bottom InstanceKlass | |
72 Instance xx = (Instance)(((InstanceKlass) bottomKlass).getClassLoader()); | |
73 return vm.classLoaderMirror(xx); | |
74 } | |
75 } | |
76 } | |
77 | |
14909 | 78 void addVisibleMethods(Map methodMap) { |
0 | 79 // arrays don't have methods |
80 } | |
81 | |
82 List getAllMethods() { | |
83 // arrays don't have methods | |
84 // JLS says arrays have methods of java.lang.Object. But | |
85 // JVMDI-JDI returns zero size list. We do the same here | |
86 // for consistency. | |
87 return new ArrayList(0); | |
88 } | |
89 | |
90 /* | |
91 * Find the type object, if any, of a component type of this array. | |
92 * The component type does not have to be immediate; e.g. this method | |
93 * can be used to find the component Foo of Foo[][]. | |
94 */ | |
95 public Type componentType() throws ClassNotLoadedException { | |
96 ArrayKlass k = (ArrayKlass) ref(); | |
97 if (k instanceof ObjArrayKlass) { | |
98 Klass elementKlass = ((ObjArrayKlass)k).getElementKlass(); | |
99 if (elementKlass == null) { | |
100 throw new ClassNotLoadedException(componentSignature()); | |
101 } else { | |
102 return vm.referenceType(elementKlass); | |
103 } | |
104 } else { | |
105 // It's a primitive type | |
106 return vm.primitiveTypeMirror(signature().charAt(1)); | |
107 } | |
108 } | |
109 | |
110 static boolean isComponentAssignable(Type destination, Type source) { | |
111 if (source instanceof PrimitiveType) { | |
112 // Assignment of primitive arrays requires identical | |
113 // component types. | |
114 return source.equals(destination); | |
115 } else { | |
116 if (destination instanceof PrimitiveType) { | |
117 return false; | |
118 } | |
119 | |
120 ReferenceTypeImpl refSource = (ReferenceTypeImpl)source; | |
121 ReferenceTypeImpl refDestination = (ReferenceTypeImpl)destination; | |
122 // Assignment of object arrays requires availability | |
123 // of widening conversion of component types | |
124 return refSource.isAssignableTo(refDestination); | |
125 } | |
126 } | |
127 | |
128 | |
129 /* | |
130 * Return true if an instance of the given reference type | |
131 * can be assigned to a variable of this type | |
132 */ | |
133 boolean isAssignableTo(ReferenceType destType) { | |
134 if (destType instanceof ArrayType) { | |
135 try { | |
136 Type destComponentType = ((ArrayType)destType).componentType(); | |
137 return isComponentAssignable(destComponentType, componentType()); | |
138 } catch (ClassNotLoadedException e) { | |
139 // One or both component types has not yet been | |
140 // loaded => can't assign | |
141 return false; | |
142 } | |
143 } else { | |
144 Symbol typeName = ((ReferenceTypeImpl)destType).typeNameAsSymbol(); | |
145 if (destType instanceof InterfaceType) { | |
146 // Every array type implements java.io.Serializable and | |
147 // java.lang.Cloneable. fixme in JVMDI-JDI, includes only | |
148 // Cloneable but not Serializable. | |
149 return typeName.equals(vm.javaLangCloneable()) || | |
150 typeName.equals(vm.javaIoSerializable()); | |
151 } else { | |
152 // Only valid ClassType assignee is Object | |
153 return typeName.equals(vm.javaLangObject()); | |
154 } | |
155 } | |
156 } | |
157 | |
158 List inheritedTypes() { | |
159 // arrays are derived from java.lang.Object and | |
160 // B[] is derived from A[] if B is derived from A. | |
161 // But JVMDI-JDI returns zero sized list and we do the | |
162 // same for consistency. | |
163 return new ArrayList(0); | |
164 } | |
165 | |
166 int getModifiers() { | |
167 /* | |
168 * For object arrays, the return values for Interface | |
169 * Accessible.isPrivate(), Accessible.isProtected(), | |
170 * etc... are the same as would be returned for the | |
171 * component type. Fetch the modifier bits from the | |
172 * component type and use those. | |
173 * | |
174 * For primitive arrays, the modifiers are always | |
175 * VMModifiers.FINAL | VMModifiers.PUBLIC | |
176 * | |
177 * Reference com.sun.jdi.Accessible.java. | |
178 */ | |
179 try { | |
180 Type t = componentType(); | |
181 if (t instanceof PrimitiveType) { | |
182 return VMModifiers.FINAL | VMModifiers.PUBLIC; | |
183 } else { | |
184 ReferenceType rt = (ReferenceType)t; | |
185 return rt.modifiers(); | |
186 } | |
187 } catch (ClassNotLoadedException cnle) { | |
188 cnle.printStackTrace(); | |
189 } | |
190 return -1; | |
191 } | |
192 | |
193 public String toString() { | |
194 return "array class " + name() + " (" + loaderString() + ")"; | |
195 } | |
196 | |
197 /* | |
198 * Save a pointless trip over the wire for these methods | |
199 * which have undefined results for arrays. | |
200 */ | |
201 public boolean isPrepared() { return true; } | |
202 public boolean isVerified() { return true; } | |
203 public boolean isInitialized() { return true; } | |
204 public boolean failedToInitialize() { return false; } | |
205 public boolean isAbstract() { return false; } | |
206 | |
207 /* | |
208 * Defined always to be true for arrays | |
209 */ | |
210 public boolean isFinal() { return true; } | |
211 } |