Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Klass.java @ 3972:4f93f0d00802
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
author | tonyp |
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date | Tue, 20 Sep 2011 09:59:59 -0400 |
parents | 1d1603768966 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 public class Klass extends Oop implements ClassConstants { | |
34 static { | |
35 VM.registerVMInitializedObserver(new Observer() { | |
36 public void update(Observable o, Object data) { | |
37 initialize(VM.getVM().getTypeDataBase()); | |
38 } | |
39 }); | |
40 } | |
41 | |
42 // anon-enum constants for _layout_helper. | |
43 public static int LH_INSTANCE_SLOW_PATH_BIT; | |
44 public static int LH_LOG2_ELEMENT_SIZE_SHIFT; | |
45 public static int LH_ELEMENT_TYPE_SHIFT; | |
46 public static int LH_HEADER_SIZE_SHIFT; | |
47 public static int LH_ARRAY_TAG_SHIFT; | |
48 public static int LH_ARRAY_TAG_TYPE_VALUE; | |
49 public static int LH_ARRAY_TAG_OBJ_VALUE; | |
50 | |
51 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
52 Type type = db.lookupType("Klass"); | |
53 javaMirror = new OopField(type.getOopField("_java_mirror"), Oop.getHeaderSize()); | |
54 superField = new OopField(type.getOopField("_super"), Oop.getHeaderSize()); | |
55 layoutHelper = new IntField(type.getJIntField("_layout_helper"), Oop.getHeaderSize()); | |
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56 name = type.getAddressField("_name"); |
0 | 57 accessFlags = new CIntField(type.getCIntegerField("_access_flags"), Oop.getHeaderSize()); |
58 subklass = new OopField(type.getOopField("_subklass"), Oop.getHeaderSize()); | |
59 nextSibling = new OopField(type.getOopField("_next_sibling"), Oop.getHeaderSize()); | |
60 allocCount = new CIntField(type.getCIntegerField("_alloc_count"), Oop.getHeaderSize()); | |
61 | |
62 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue(); | |
63 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue(); | |
64 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue(); | |
65 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue(); | |
66 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue(); | |
67 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue(); | |
68 LH_ARRAY_TAG_OBJ_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue(); | |
69 } | |
70 | |
71 Klass(OopHandle handle, ObjectHeap heap) { | |
72 super(handle, heap); | |
73 } | |
74 | |
75 // jvmdi support - see also class_status in VM code | |
76 public int getClassStatus() { | |
77 return 0; // overridden in derived classes | |
78 } | |
79 | |
80 public boolean isKlass() { return true; } | |
81 | |
82 // Fields | |
83 private static OopField javaMirror; | |
84 private static OopField superField; | |
85 private static IntField layoutHelper; | |
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86 private static AddressField name; |
0 | 87 private static CIntField accessFlags; |
88 private static OopField subklass; | |
89 private static OopField nextSibling; | |
90 private static CIntField allocCount; | |
91 | |
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92 private Address getValue(AddressField field) { |
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93 return getHandle().getAddressAt(field.getOffset() + Oop.getHeaderSize()); |
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94 } |
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95 |
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96 protected Symbol getSymbol(AddressField field) { |
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97 return Symbol.create(getHandle().getAddressAt(field.getOffset() + Oop.getHeaderSize())); |
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98 } |
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99 |
0 | 100 // Accessors for declared fields |
101 public Instance getJavaMirror() { return (Instance) javaMirror.getValue(this); } | |
102 public Klass getSuper() { return (Klass) superField.getValue(this); } | |
103 public Klass getJavaSuper() { return null; } | |
104 public int getLayoutHelper() { return (int) layoutHelper.getValue(this); } | |
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105 public Symbol getName() { return getSymbol(name); } |
0 | 106 public long getAccessFlags() { return accessFlags.getValue(this); } |
107 // Convenience routine | |
108 public AccessFlags getAccessFlagsObj(){ return new AccessFlags(getAccessFlags()); } | |
109 public Klass getSubklassKlass() { return (Klass) subklass.getValue(this); } | |
110 public Klass getNextSiblingKlass() { return (Klass) nextSibling.getValue(this); } | |
111 public long getAllocCount() { return allocCount.getValue(this); } | |
112 | |
113 // computed access flags - takes care of inner classes etc. | |
114 // This is closer to actual source level than getAccessFlags() etc. | |
115 public long computeModifierFlags() { | |
116 return 0L; // Unless overridden, modifier_flags is 0. | |
117 } | |
118 | |
119 // same as JVM_GetClassModifiers | |
120 public final long getClassModifiers() { | |
121 // unlike the VM counterpart we never have to deal with primitive type, | |
122 // because we operator on Klass and not an instance of java.lang.Class. | |
123 long flags = computeModifierFlags(); | |
124 if (isSuper()) { | |
125 flags |= JVM_ACC_SUPER; | |
126 } | |
127 return flags; | |
128 } | |
129 | |
130 // subclass check | |
131 public boolean isSubclassOf(Klass k) { | |
132 if (k != null) { | |
133 Klass t = this; | |
134 // Run up the super chain and check | |
135 while (t != null) { | |
136 if (t.equals(k)) return true; | |
137 t = t.getSuper(); | |
138 } | |
139 } | |
140 return false; | |
141 } | |
142 | |
143 // subtype check | |
144 public boolean isSubtypeOf(Klass k) { | |
145 return computeSubtypeOf(k); | |
146 } | |
147 | |
148 boolean computeSubtypeOf(Klass k) { | |
149 return isSubclassOf(k); | |
150 } | |
151 | |
152 // Find LCA (Least Common Ancester) in class heirarchy | |
153 public Klass lca( Klass k2 ) { | |
154 Klass k1 = this; | |
155 while ( true ) { | |
156 if ( k1.isSubtypeOf(k2) ) return k2; | |
157 if ( k2.isSubtypeOf(k1) ) return k1; | |
158 k1 = k1.getSuper(); | |
159 k2 = k2.getSuper(); | |
160 } | |
161 } | |
162 | |
163 public void printValueOn(PrintStream tty) { | |
164 tty.print("Klass"); | |
165 } | |
166 | |
167 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
168 super.iterateFields(visitor, doVMFields); | |
169 if (doVMFields) { | |
170 visitor.doOop(javaMirror, true); | |
171 visitor.doOop(superField, true); | |
172 visitor.doInt(layoutHelper, true); | |
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173 // visitor.doOop(name, true); |
0 | 174 visitor.doCInt(accessFlags, true); |
175 visitor.doOop(subklass, true); | |
176 visitor.doOop(nextSibling, true); | |
177 visitor.doCInt(allocCount, true); | |
178 } | |
179 } | |
180 | |
181 public long getObjectSize() { | |
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182 throw new RuntimeException("should not reach here"); |
0 | 183 } |
184 | |
185 /** Array class with specific rank */ | |
186 public Klass arrayKlass(int rank) { return arrayKlassImpl(false, rank); } | |
187 /** Array class with this klass as element type */ | |
188 public Klass arrayKlass() { return arrayKlassImpl(false); } | |
189 /** These will return null instead of allocating on the heap */ | |
190 public Klass arrayKlassOrNull(int rank) { return arrayKlassImpl(true, rank); } | |
191 public Klass arrayKlassOrNull() { return arrayKlassImpl(true); } | |
192 | |
193 public Klass arrayKlassImpl(boolean orNull, int rank) { | |
194 throw new RuntimeException("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
195 } | |
196 | |
197 public Klass arrayKlassImpl(boolean orNull) { | |
198 throw new RuntimeException("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass"); | |
199 } | |
200 | |
201 // This returns the name in the form java/lang/String which isn't really a signature | |
202 // The subclasses override this to produce the correct form, eg | |
203 // Ljava/lang/String; For ArrayKlasses getName itself is the signature. | |
204 public String signature() { return getName().asString(); } | |
205 | |
206 // Convenience routines | |
207 public boolean isPublic() { return getAccessFlagsObj().isPublic(); } | |
208 public boolean isFinal() { return getAccessFlagsObj().isFinal(); } | |
209 public boolean isInterface() { return getAccessFlagsObj().isInterface(); } | |
210 public boolean isAbstract() { return getAccessFlagsObj().isAbstract(); } | |
211 public boolean isSuper() { return getAccessFlagsObj().isSuper(); } | |
212 public boolean isSynthetic() { return getAccessFlagsObj().isSynthetic(); } | |
213 public boolean hasFinalizer() { return getAccessFlagsObj().hasFinalizer(); } | |
214 public boolean isCloneable() { return getAccessFlagsObj().isCloneable(); } | |
215 public boolean hasVanillaConstructor() { return getAccessFlagsObj().hasVanillaConstructor(); } | |
216 public boolean hasMirandaMethods () { return getAccessFlagsObj().hasMirandaMethods(); } | |
217 } |