Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 04ade88d9712 |
| children | bd7a7ce2e264 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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.*; | |
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29 import sun.jvm.hotspot.classfile.ClassLoaderData; |
| 0 | 30 import sun.jvm.hotspot.debugger.*; |
| 31 import sun.jvm.hotspot.memory.*; | |
| 32 import sun.jvm.hotspot.runtime.*; | |
| 33 import sun.jvm.hotspot.types.*; | |
| 34 import sun.jvm.hotspot.utilities.*; | |
| 35 | |
| 36 // An InstanceKlass is the VM level representation of a Java class. | |
| 37 | |
| 38 public class InstanceKlass extends Klass { | |
| 39 static { | |
| 40 VM.registerVMInitializedObserver(new Observer() { | |
| 41 public void update(Observable o, Object data) { | |
| 42 initialize(VM.getVM().getTypeDataBase()); | |
| 43 } | |
| 44 }); | |
| 45 } | |
| 46 | |
| 47 // field offset constants | |
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48 private static int ACCESS_FLAGS_OFFSET; |
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49 private static int NAME_INDEX_OFFSET; |
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50 private static int SIGNATURE_INDEX_OFFSET; |
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51 private static int INITVAL_INDEX_OFFSET; |
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52 private static int LOW_OFFSET; |
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53 private static int HIGH_OFFSET; |
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54 private static int FIELD_SLOTS; |
| 0 | 55 |
| 56 // ClassState constants | |
| 57 private static int CLASS_STATE_ALLOCATED; | |
| 58 private static int CLASS_STATE_LOADED; | |
| 59 private static int CLASS_STATE_LINKED; | |
| 60 private static int CLASS_STATE_BEING_INITIALIZED; | |
| 61 private static int CLASS_STATE_FULLY_INITIALIZED; | |
| 62 private static int CLASS_STATE_INITIALIZATION_ERROR; | |
| 63 | |
| 64 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
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65 Type type = db.lookupType("InstanceKlass"); |
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66 arrayKlasses = new MetadataField(type.getAddressField("_array_klasses"), 0); |
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67 methods = type.getAddressField("_methods"); |
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68 methodOrdering = type.getAddressField("_method_ordering"); |
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69 localInterfaces = type.getAddressField("_local_interfaces"); |
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70 transitiveInterfaces = type.getAddressField("_transitive_interfaces"); |
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71 fields = type.getAddressField("_fields"); |
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72 javaFieldsCount = new CIntField(type.getCIntegerField("_java_fields_count"), 0); |
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73 constants = new MetadataField(type.getAddressField("_constants"), 0); |
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74 classLoaderData = type.getAddressField("_class_loader_data"); |
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75 protectionDomain = new OopField(type.getOopField("_protection_domain"), 0); |
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76 signers = new OopField(type.getOopField("_signers"), 0); |
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77 sourceFileName = type.getAddressField("_source_file_name"); |
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78 sourceDebugExtension = type.getAddressField("_source_debug_extension"); |
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79 innerClasses = type.getAddressField("_inner_classes"); |
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80 nonstaticFieldSize = new CIntField(type.getCIntegerField("_nonstatic_field_size"), 0); |
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81 staticFieldSize = new CIntField(type.getCIntegerField("_static_field_size"), 0); |
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82 staticOopFieldCount = new CIntField(type.getCIntegerField("_static_oop_field_count"), 0); |
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83 nonstaticOopMapSize = new CIntField(type.getCIntegerField("_nonstatic_oop_map_size"), 0); |
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84 isMarkedDependent = new CIntField(type.getCIntegerField("_is_marked_dependent"), 0); |
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85 initState = new CIntField(type.getCIntegerField("_init_state"), 0); |
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86 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0); |
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87 itableLen = new CIntField(type.getCIntegerField("_itable_len"), 0); |
| 0 | 88 breakpoints = type.getAddressField("_breakpoints"); |
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89 genericSignature = type.getAddressField("_generic_signature"); |
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90 majorVersion = new CIntField(type.getCIntegerField("_major_version"), 0); |
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91 minorVersion = new CIntField(type.getCIntegerField("_minor_version"), 0); |
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92 headerSize = Oop.alignObjectOffset(type.getSize()); |
| 0 | 93 |
| 94 // read field offset constants | |
| 3938 | 95 ACCESS_FLAGS_OFFSET = db.lookupIntConstant("FieldInfo::access_flags_offset").intValue(); |
| 96 NAME_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::name_index_offset").intValue(); | |
| 97 SIGNATURE_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::signature_index_offset").intValue(); | |
| 98 INITVAL_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::initval_index_offset").intValue(); | |
| 99 LOW_OFFSET = db.lookupIntConstant("FieldInfo::low_offset").intValue(); | |
| 100 HIGH_OFFSET = db.lookupIntConstant("FieldInfo::high_offset").intValue(); | |
| 101 FIELD_SLOTS = db.lookupIntConstant("FieldInfo::field_slots").intValue(); | |
| 0 | 102 // read ClassState constants |
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103 CLASS_STATE_ALLOCATED = db.lookupIntConstant("InstanceKlass::allocated").intValue(); |
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104 CLASS_STATE_LOADED = db.lookupIntConstant("InstanceKlass::loaded").intValue(); |
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105 CLASS_STATE_LINKED = db.lookupIntConstant("InstanceKlass::linked").intValue(); |
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106 CLASS_STATE_BEING_INITIALIZED = db.lookupIntConstant("InstanceKlass::being_initialized").intValue(); |
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107 CLASS_STATE_FULLY_INITIALIZED = db.lookupIntConstant("InstanceKlass::fully_initialized").intValue(); |
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108 CLASS_STATE_INITIALIZATION_ERROR = db.lookupIntConstant("InstanceKlass::initialization_error").intValue(); |
| 0 | 109 |
| 110 } | |
| 111 | |
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112 public InstanceKlass(Address addr) { |
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113 super(addr); |
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114 if (getJavaFieldsCount() != getAllFieldsCount()) { |
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115 // Exercise the injected field logic |
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116 for (int i = getJavaFieldsCount(); i < getAllFieldsCount(); i++) { |
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117 getFieldName(i); |
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118 getFieldSignature(i); |
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119 } |
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120 } |
| 0 | 121 } |
| 122 | |
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123 private static MetadataField arrayKlasses; |
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124 private static AddressField methods; |
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125 private static AddressField methodOrdering; |
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126 private static AddressField localInterfaces; |
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127 private static AddressField transitiveInterfaces; |
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128 private static AddressField fields; |
| 3938 | 129 private static CIntField javaFieldsCount; |
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130 private static MetadataField constants; |
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131 private static AddressField classLoaderData; |
| 0 | 132 private static OopField protectionDomain; |
| 133 private static OopField signers; | |
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134 private static AddressField sourceFileName; |
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135 private static AddressField sourceDebugExtension; |
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136 private static AddressField innerClasses; |
| 0 | 137 private static CIntField nonstaticFieldSize; |
| 138 private static CIntField staticFieldSize; | |
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139 private static CIntField staticOopFieldCount; |
| 0 | 140 private static CIntField nonstaticOopMapSize; |
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141 private static CIntField isMarkedDependent; |
| 0 | 142 private static CIntField initState; |
| 143 private static CIntField vtableLen; | |
| 144 private static CIntField itableLen; | |
| 145 private static AddressField breakpoints; | |
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146 private static AddressField genericSignature; |
| 0 | 147 private static CIntField majorVersion; |
| 148 private static CIntField minorVersion; | |
| 149 | |
| 150 // type safe enum for ClassState from instanceKlass.hpp | |
| 151 public static class ClassState { | |
| 152 public static final ClassState ALLOCATED = new ClassState("allocated"); | |
| 153 public static final ClassState LOADED = new ClassState("loaded"); | |
| 154 public static final ClassState LINKED = new ClassState("linked"); | |
| 155 public static final ClassState BEING_INITIALIZED = new ClassState("beingInitialized"); | |
| 156 public static final ClassState FULLY_INITIALIZED = new ClassState("fullyInitialized"); | |
| 157 public static final ClassState INITIALIZATION_ERROR = new ClassState("initializationError"); | |
| 158 | |
| 159 private ClassState(String value) { | |
| 160 this.value = value; | |
| 161 } | |
| 162 | |
| 163 public String toString() { | |
| 164 return value; | |
| 165 } | |
| 166 | |
| 167 private String value; | |
| 168 } | |
| 169 | |
| 3939 | 170 public int getInitStateAsInt() { return (int) initState.getValue(this); } |
| 0 | 171 public ClassState getInitState() { |
| 172 int state = getInitStateAsInt(); | |
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173 if (state == CLASS_STATE_ALLOCATED) { |
| 0 | 174 return ClassState.ALLOCATED; |
| 175 } else if (state == CLASS_STATE_LOADED) { | |
| 176 return ClassState.LOADED; | |
| 177 } else if (state == CLASS_STATE_LINKED) { | |
| 178 return ClassState.LINKED; | |
| 179 } else if (state == CLASS_STATE_BEING_INITIALIZED) { | |
| 180 return ClassState.BEING_INITIALIZED; | |
| 181 } else if (state == CLASS_STATE_FULLY_INITIALIZED) { | |
| 182 return ClassState.FULLY_INITIALIZED; | |
| 183 } else if (state == CLASS_STATE_INITIALIZATION_ERROR) { | |
| 184 return ClassState.INITIALIZATION_ERROR; | |
| 185 } else { | |
| 186 throw new RuntimeException("should not reach here"); | |
| 187 } | |
| 188 } | |
| 189 | |
| 190 // initialization state quaries | |
| 191 public boolean isLoaded() { | |
| 192 return getInitStateAsInt() >= CLASS_STATE_LOADED; | |
| 193 } | |
| 194 | |
| 195 public boolean isLinked() { | |
| 196 return getInitStateAsInt() >= CLASS_STATE_LINKED; | |
| 197 } | |
| 198 | |
| 199 public boolean isInitialized() { | |
| 200 return getInitStateAsInt() == CLASS_STATE_FULLY_INITIALIZED; | |
| 201 } | |
| 202 | |
| 203 public boolean isNotInitialized() { | |
| 204 return getInitStateAsInt() < CLASS_STATE_BEING_INITIALIZED; | |
| 205 } | |
| 206 | |
| 207 public boolean isBeingInitialized() { | |
| 208 return getInitStateAsInt() == CLASS_STATE_BEING_INITIALIZED; | |
| 209 } | |
| 210 | |
| 211 public boolean isInErrorState() { | |
| 212 return getInitStateAsInt() == CLASS_STATE_INITIALIZATION_ERROR; | |
| 213 } | |
| 214 | |
| 215 public int getClassStatus() { | |
| 216 int result = 0; | |
| 217 if (isLinked()) { | |
| 218 result |= JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED; | |
| 219 } | |
| 220 | |
| 221 if (isInitialized()) { | |
| 222 if (Assert.ASSERTS_ENABLED) { | |
| 223 Assert.that(isLinked(), "Class status is not consistent"); | |
| 224 } | |
| 225 result |= JVMDIClassStatus.INITIALIZED; | |
| 226 } | |
| 227 | |
| 228 if (isInErrorState()) { | |
| 229 result |= JVMDIClassStatus.ERROR; | |
| 230 } | |
| 231 return result; | |
| 232 } | |
| 233 | |
| 234 // Byteside of the header | |
| 235 private static long headerSize; | |
| 236 | |
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237 public long getObjectSize(Oop object) { |
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238 return getSizeHelper() * VM.getVM().getAddressSize(); |
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239 } |
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240 |
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241 public long getSize() { |
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242 return Oop.alignObjectSize(getHeaderSize() + Oop.alignObjectOffset(getVtableLen()) + |
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243 Oop.alignObjectOffset(getItableLen()) + Oop.alignObjectOffset(getNonstaticOopMapSize())); |
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244 } |
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245 |
| 0 | 246 public static long getHeaderSize() { return headerSize; } |
| 247 | |
| 3938 | 248 public short getFieldAccessFlags(int index) { |
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249 return getFields().at(index * FIELD_SLOTS + ACCESS_FLAGS_OFFSET); |
| 3938 | 250 } |
| 251 | |
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252 public short getFieldNameIndex(int index) { |
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253 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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254 return getFields().at(index * FIELD_SLOTS + NAME_INDEX_OFFSET); |
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255 } |
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256 |
| 3938 | 257 public Symbol getFieldName(int index) { |
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258 int nameIndex = getFields().at(index * FIELD_SLOTS + NAME_INDEX_OFFSET); |
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259 if (index < getJavaFieldsCount()) { |
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260 return getConstants().getSymbolAt(nameIndex); |
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261 } else { |
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262 return vmSymbols.symbolAt(nameIndex); |
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263 } |
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264 } |
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265 |
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266 public short getFieldSignatureIndex(int index) { |
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267 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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268 return getFields().at(index * FIELD_SLOTS + SIGNATURE_INDEX_OFFSET); |
| 3938 | 269 } |
| 270 | |
| 271 public Symbol getFieldSignature(int index) { | |
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272 int signatureIndex = getFields().at(index * FIELD_SLOTS + SIGNATURE_INDEX_OFFSET); |
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273 if (index < getJavaFieldsCount()) { |
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274 return getConstants().getSymbolAt(signatureIndex); |
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275 } else { |
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276 return vmSymbols.symbolAt(signatureIndex); |
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277 } |
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278 } |
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279 |
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280 public short getFieldGenericSignatureIndex(int index) { |
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281 int len = getFields().length(); |
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282 int allFieldsCount = getAllFieldsCount(); |
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283 int generic_signature_slot = allFieldsCount * FIELD_SLOTS; |
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284 for (int i = 0; i < allFieldsCount; i++) { |
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285 short flags = getFieldAccessFlags(i); |
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286 AccessFlags access = new AccessFlags(flags); |
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287 if (i == index) { |
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288 if (access.fieldHasGenericSignature()) { |
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289 return getFields().at(generic_signature_slot); |
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290 } else { |
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291 return 0; |
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292 } |
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293 } else { |
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294 if (access.fieldHasGenericSignature()) { |
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295 generic_signature_slot ++; |
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296 } |
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297 } |
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298 } |
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299 return 0; |
| 3938 | 300 } |
| 301 | |
| 302 public Symbol getFieldGenericSignature(int index) { | |
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303 short genericSignatureIndex = getFieldGenericSignatureIndex(index); |
| 3938 | 304 if (genericSignatureIndex != 0) { |
| 305 return getConstants().getSymbolAt(genericSignatureIndex); | |
| 306 } | |
| 307 return null; | |
| 308 } | |
| 309 | |
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310 public short getFieldInitialValueIndex(int index) { |
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311 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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312 return getFields().at(index * FIELD_SLOTS + INITVAL_INDEX_OFFSET); |
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313 } |
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314 |
| 3938 | 315 public int getFieldOffset(int index) { |
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316 U2Array fields = getFields(); |
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317 return VM.getVM().buildIntFromShorts(fields.at(index * FIELD_SLOTS + LOW_OFFSET), |
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318 fields.at(index * FIELD_SLOTS + HIGH_OFFSET)); |
| 3938 | 319 } |
| 320 | |
| 0 | 321 // Accessors for declared fields |
| 322 public Klass getArrayKlasses() { return (Klass) arrayKlasses.getValue(this); } | |
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323 public MethodArray getMethods() { return new MethodArray(methods.getValue(getAddress())); } |
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324 public KlassArray getLocalInterfaces() { return new KlassArray(localInterfaces.getValue(getAddress())); } |
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325 public KlassArray getTransitiveInterfaces() { return new KlassArray(transitiveInterfaces.getValue(getAddress())); } |
| 3938 | 326 public int getJavaFieldsCount() { return (int) javaFieldsCount.getValue(this); } |
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327 public int getAllFieldsCount() { |
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328 int len = getFields().length(); |
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329 int allFieldsCount = 0; |
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330 for (; allFieldsCount*FIELD_SLOTS < len; allFieldsCount++) { |
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331 short flags = getFieldAccessFlags(allFieldsCount); |
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332 AccessFlags access = new AccessFlags(flags); |
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333 if (access.fieldHasGenericSignature()) { |
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334 len --; |
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335 } |
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336 } |
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337 return allFieldsCount; |
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338 } |
| 0 | 339 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } |
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340 public ClassLoaderData getClassLoaderData() { return ClassLoaderData.instantiateWrapperFor(classLoaderData.getValue(getAddress())); } |
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341 public Oop getClassLoader() { return getClassLoaderData().getClassLoader(); } |
| 0 | 342 public Oop getProtectionDomain() { return protectionDomain.getValue(this); } |
| 343 public ObjArray getSigners() { return (ObjArray) signers.getValue(this); } | |
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344 public Symbol getSourceFileName() { return getSymbol(sourceFileName); } |
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345 public String getSourceDebugExtension(){ return CStringUtilities.getString(sourceDebugExtension.getValue(getAddress())); } |
| 0 | 346 public long getNonstaticFieldSize() { return nonstaticFieldSize.getValue(this); } |
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347 public long getStaticOopFieldCount() { return staticOopFieldCount.getValue(this); } |
| 0 | 348 public long getNonstaticOopMapSize() { return nonstaticOopMapSize.getValue(this); } |
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349 public boolean getIsMarkedDependent() { return isMarkedDependent.getValue(this) != 0; } |
| 0 | 350 public long getVtableLen() { return vtableLen.getValue(this); } |
| 351 public long getItableLen() { return itableLen.getValue(this); } | |
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352 public Symbol getGenericSignature() { return getSymbol(genericSignature); } |
| 0 | 353 public long majorVersion() { return majorVersion.getValue(this); } |
| 354 public long minorVersion() { return minorVersion.getValue(this); } | |
| 355 | |
| 356 // "size helper" == instance size in words | |
| 357 public long getSizeHelper() { | |
| 358 int lh = getLayoutHelper(); | |
| 359 if (Assert.ASSERTS_ENABLED) { | |
| 360 Assert.that(lh > 0, "layout helper initialized for instance class"); | |
| 361 } | |
| 362 return lh / VM.getVM().getAddressSize(); | |
| 363 } | |
| 364 | |
| 365 // same as enum InnerClassAttributeOffset in VM code. | |
| 366 public static interface InnerClassAttributeOffset { | |
| 367 // from JVM spec. "InnerClasses" attribute | |
| 368 public static final int innerClassInnerClassInfoOffset = 0; | |
| 369 public static final int innerClassOuterClassInfoOffset = 1; | |
| 370 public static final int innerClassInnerNameOffset = 2; | |
| 371 public static final int innerClassAccessFlagsOffset = 3; | |
| 372 public static final int innerClassNextOffset = 4; | |
| 373 }; | |
| 374 | |
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375 public static interface EnclosingMethodAttributeOffset { |
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376 public static final int enclosing_method_class_index_offset = 0; |
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377 public static final int enclosing_method_method_index_offset = 1; |
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378 public static final int enclosing_method_attribute_size = 2; |
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379 }; |
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380 |
| 0 | 381 // refer to compute_modifier_flags in VM code. |
| 382 public long computeModifierFlags() { | |
| 383 long access = getAccessFlags(); | |
| 384 // But check if it happens to be member class. | |
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385 U2Array innerClassList = getInnerClasses(); |
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386 int length = (innerClassList == null)? 0 : (int) innerClassList.length(); |
| 0 | 387 if (length > 0) { |
| 388 if (Assert.ASSERTS_ENABLED) { | |
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389 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0 || |
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390 length % InnerClassAttributeOffset.innerClassNextOffset == EnclosingMethodAttributeOffset.enclosing_method_attribute_size, |
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391 "just checking"); |
| 0 | 392 } |
| 393 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
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394 if (i == length - EnclosingMethodAttributeOffset.enclosing_method_attribute_size) { |
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395 break; |
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396 } |
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397 int ioff = innerClassList.at(i + |
| 0 | 398 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); |
| 399 // 'ioff' can be zero. | |
| 400 // refer to JVM spec. section 4.7.5. | |
| 401 if (ioff != 0) { | |
| 402 // only look at classes that are already loaded | |
| 403 // since we are looking for the flags for our self. | |
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404 ConstantPool.CPSlot classInfo = getConstants().getSlotAt(ioff); |
| 0 | 405 Symbol name = null; |
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406 if (classInfo.isResolved()) { |
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407 name = classInfo.getKlass().getName(); |
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408 } else if (classInfo.isUnresolved()) { |
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409 name = classInfo.getSymbol(); |
| 0 | 410 } else { |
| 411 throw new RuntimeException("should not reach here"); | |
| 412 } | |
| 413 | |
| 414 if (name.equals(getName())) { | |
| 415 // This is really a member class | |
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416 access = innerClassList.at(i + |
| 0 | 417 InnerClassAttributeOffset.innerClassAccessFlagsOffset); |
| 418 break; | |
| 419 } | |
| 420 } | |
| 421 } // for inner classes | |
| 422 } | |
| 423 | |
| 424 // Remember to strip ACC_SUPER bit | |
| 425 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 426 } | |
| 427 | |
| 428 | |
| 429 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 430 // anonymous and local classes are excluded. | |
| 431 public boolean isInnerClassName(Symbol sym) { | |
| 432 return isInInnerClasses(sym, false); | |
| 433 } | |
| 434 | |
| 435 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 436 // anonymous classes excluded, but local classes are included. | |
| 437 public boolean isInnerOrLocalClassName(Symbol sym) { | |
| 438 return isInInnerClasses(sym, true); | |
| 439 } | |
| 440 | |
| 441 private boolean isInInnerClasses(Symbol sym, boolean includeLocals) { | |
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442 U2Array innerClassList = getInnerClasses(); |
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443 int length = ( innerClassList == null)? 0 : (int) innerClassList.length(); |
| 0 | 444 if (length > 0) { |
| 445 if (Assert.ASSERTS_ENABLED) { | |
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446 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0 || |
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447 length % InnerClassAttributeOffset.innerClassNextOffset == EnclosingMethodAttributeOffset.enclosing_method_attribute_size, |
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448 "just checking"); |
| 0 | 449 } |
| 450 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
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451 if (i == length - EnclosingMethodAttributeOffset.enclosing_method_attribute_size) { |
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452 break; |
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453 } |
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454 int ioff = innerClassList.at(i + |
| 0 | 455 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); |
| 456 // 'ioff' can be zero. | |
| 457 // refer to JVM spec. section 4.7.5. | |
| 458 if (ioff != 0) { | |
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459 ConstantPool.CPSlot iclassInfo = getConstants().getSlotAt(ioff); |
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460 Symbol innerName = getConstants().getKlassNameAt(ioff); |
| 0 | 461 Symbol myname = getName(); |
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462 int ooff = innerClassList.at(i + |
| 0 | 463 InnerClassAttributeOffset.innerClassOuterClassInfoOffset); |
| 464 // for anonymous classes inner_name_index of InnerClasses | |
| 465 // attribute is zero. | |
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466 int innerNameIndex = innerClassList.at(i + |
| 0 | 467 InnerClassAttributeOffset.innerClassInnerNameOffset); |
| 468 // if this is not a member (anonymous, local etc.), 'ooff' will be zero | |
| 469 // refer to JVM spec. section 4.7.5. | |
| 470 if (ooff == 0) { | |
| 471 if (includeLocals) { | |
| 472 // does it looks like my local class? | |
| 473 if (innerName.equals(sym) && | |
| 474 innerName.asString().startsWith(myname.asString())) { | |
| 475 // exclude anonymous classes. | |
| 476 return (innerNameIndex != 0); | |
| 477 } | |
| 478 } | |
| 479 } else { | |
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480 ConstantPool.CPSlot oclassInfo = getConstants().getSlotAt(ooff); |
| 0 | 481 Symbol outerName = null; |
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482 if (oclassInfo.isResolved()) { |
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483 outerName = oclassInfo.getKlass().getName(); |
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484 } else if (oclassInfo.isUnresolved()) { |
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485 outerName = oclassInfo.getSymbol(); |
| 0 | 486 } else { |
| 487 throw new RuntimeException("should not reach here"); | |
| 488 } | |
| 489 | |
| 490 // include only if current class is outer class. | |
| 491 if (outerName.equals(myname) && innerName.equals(sym)) { | |
| 492 return true; | |
| 493 } | |
| 494 } | |
| 495 } | |
| 496 } // for inner classes | |
| 497 return false; | |
| 498 } else { | |
| 499 return false; | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 public boolean implementsInterface(Klass k) { | |
| 504 if (Assert.ASSERTS_ENABLED) { | |
| 505 Assert.that(k.isInterface(), "should not reach here"); | |
| 506 } | |
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507 KlassArray interfaces = getTransitiveInterfaces(); |
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508 final int len = interfaces.length(); |
| 0 | 509 for (int i = 0; i < len; i++) { |
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510 if (interfaces.getAt(i).equals(k)) return true; |
| 0 | 511 } |
| 512 return false; | |
| 513 } | |
| 514 | |
| 515 boolean computeSubtypeOf(Klass k) { | |
| 516 if (k.isInterface()) { | |
| 517 return implementsInterface(k); | |
| 518 } else { | |
| 519 return super.computeSubtypeOf(k); | |
| 520 } | |
| 521 } | |
| 522 | |
| 523 public void printValueOn(PrintStream tty) { | |
| 524 tty.print("InstanceKlass for " + getName().asString()); | |
| 525 } | |
| 526 | |
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527 public void iterateFields(MetadataVisitor visitor) { |
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528 super.iterateFields(visitor); |
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529 visitor.doMetadata(arrayKlasses, true); |
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530 // visitor.doOop(methods, true); |
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531 // visitor.doOop(localInterfaces, true); |
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532 // visitor.doOop(transitiveInterfaces, true); |
| 0 | 533 visitor.doOop(protectionDomain, true); |
| 534 visitor.doOop(signers, true); | |
| 535 visitor.doCInt(nonstaticFieldSize, true); | |
| 536 visitor.doCInt(staticFieldSize, true); | |
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537 visitor.doCInt(staticOopFieldCount, true); |
| 0 | 538 visitor.doCInt(nonstaticOopMapSize, true); |
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539 visitor.doCInt(isMarkedDependent, true); |
| 0 | 540 visitor.doCInt(initState, true); |
| 541 visitor.doCInt(vtableLen, true); | |
| 542 visitor.doCInt(itableLen, true); | |
| 543 } | |
| 544 | |
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545 /* |
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546 * Visit the static fields of this InstanceKlass with the obj of |
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547 * the visitor set to the oop holding the fields, which is |
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548 * currently the java mirror. |
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549 */ |
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550 public void iterateStaticFields(OopVisitor visitor) { |
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551 visitor.setObj(getJavaMirror()); |
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552 visitor.prologue(); |
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553 iterateStaticFieldsInternal(visitor); |
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554 visitor.epilogue(); |
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555 |
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556 } |
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557 |
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558 void iterateStaticFieldsInternal(OopVisitor visitor) { |
| 3938 | 559 int length = getJavaFieldsCount(); |
| 3944 | 560 for (int index = 0; index < length; index++) { |
| 561 short accessFlags = getFieldAccessFlags(index); | |
| 562 FieldType type = new FieldType(getFieldSignature(index)); | |
| 0 | 563 AccessFlags access = new AccessFlags(accessFlags); |
| 564 if (access.isStatic()) { | |
| 565 visitField(visitor, type, index); | |
| 566 } | |
| 567 } | |
| 568 } | |
| 569 | |
| 570 public Klass getJavaSuper() { | |
| 571 return getSuper(); | |
| 572 } | |
| 573 | |
| 3939 | 574 public static class StaticField { |
| 575 public AccessFlags flags; | |
| 576 public Field field; | |
| 577 | |
| 578 StaticField(Field field, AccessFlags flags) { | |
| 579 this.field = field; | |
| 580 this.flags = flags; | |
| 581 } | |
| 582 } | |
| 583 | |
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584 public void iterateNonStaticFields(OopVisitor visitor, Oop obj) { |
| 0 | 585 if (getSuper() != null) { |
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586 ((InstanceKlass) getSuper()).iterateNonStaticFields(visitor, obj); |
| 0 | 587 } |
| 3938 | 588 int length = getJavaFieldsCount(); |
| 3944 | 589 for (int index = 0; index < length; index++) { |
| 590 short accessFlags = getFieldAccessFlags(index); | |
| 591 FieldType type = new FieldType(getFieldSignature(index)); | |
| 0 | 592 AccessFlags access = new AccessFlags(accessFlags); |
| 593 if (!access.isStatic()) { | |
| 594 visitField(visitor, type, index); | |
| 595 } | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 /** Field access by name. */ | |
| 600 public Field findLocalField(Symbol name, Symbol sig) { | |
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601 int length = getJavaFieldsCount(); |
| 3944 | 602 for (int i = 0; i < length; i++) { |
| 603 Symbol f_name = getFieldName(i); | |
| 604 Symbol f_sig = getFieldSignature(i); | |
| 0 | 605 if (name.equals(f_name) && sig.equals(f_sig)) { |
| 606 return newField(i); | |
| 607 } | |
| 608 } | |
| 609 | |
| 610 return null; | |
| 611 } | |
| 612 | |
| 613 /** Find field in direct superinterfaces. */ | |
| 614 public Field findInterfaceField(Symbol name, Symbol sig) { | |
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615 KlassArray interfaces = getLocalInterfaces(); |
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616 int n = interfaces.length(); |
| 0 | 617 for (int i = 0; i < n; i++) { |
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618 InstanceKlass intf1 = (InstanceKlass) interfaces.getAt(i); |
| 0 | 619 if (Assert.ASSERTS_ENABLED) { |
| 620 Assert.that(intf1.isInterface(), "just checking type"); | |
| 621 } | |
| 622 // search for field in current interface | |
| 623 Field f = intf1.findLocalField(name, sig); | |
| 624 if (f != null) { | |
| 625 if (Assert.ASSERTS_ENABLED) { | |
| 626 Assert.that(f.getAccessFlagsObj().isStatic(), "interface field must be static"); | |
| 627 } | |
| 628 return f; | |
| 629 } | |
| 630 // search for field in direct superinterfaces | |
| 631 f = intf1.findInterfaceField(name, sig); | |
| 632 if (f != null) return f; | |
| 633 } | |
| 634 // otherwise field lookup fails | |
| 635 return null; | |
| 636 } | |
| 637 | |
| 638 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 639 which the field is defined. */ | |
| 640 public Field findField(Symbol name, Symbol sig) { | |
| 641 // search order according to newest JVM spec (5.4.3.2, p.167). | |
| 642 // 1) search for field in current klass | |
| 643 Field f = findLocalField(name, sig); | |
| 644 if (f != null) return f; | |
| 645 | |
| 646 // 2) search for field recursively in direct superinterfaces | |
| 647 f = findInterfaceField(name, sig); | |
| 648 if (f != null) return f; | |
| 649 | |
| 650 // 3) apply field lookup recursively if superclass exists | |
| 651 InstanceKlass supr = (InstanceKlass) getSuper(); | |
| 652 if (supr != null) return supr.findField(name, sig); | |
| 653 | |
| 654 // 4) otherwise field lookup fails | |
| 655 return null; | |
| 656 } | |
| 657 | |
| 658 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 659 which the field is defined (convenience routine) */ | |
| 660 public Field findField(String name, String sig) { | |
| 661 SymbolTable symbols = VM.getVM().getSymbolTable(); | |
| 662 Symbol nameSym = symbols.probe(name); | |
| 663 Symbol sigSym = symbols.probe(sig); | |
| 664 if (nameSym == null || sigSym == null) { | |
| 665 return null; | |
| 666 } | |
| 667 return findField(nameSym, sigSym); | |
| 668 } | |
| 669 | |
| 670 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 671 which the field is defined (retained only for backward | |
| 672 compatibility with jdbx) */ | |
| 673 public Field findFieldDbg(String name, String sig) { | |
| 674 return findField(name, sig); | |
| 675 } | |
| 676 | |
| 677 /** Get field by its index in the fields array. Only designed for | |
| 678 use in a debugging system. */ | |
| 3944 | 679 public Field getFieldByIndex(int fieldIndex) { |
| 680 return newField(fieldIndex); | |
| 0 | 681 } |
| 682 | |
| 683 | |
| 684 /** Return a List of SA Fields for the fields declared in this class. | |
| 685 Inherited fields are not included. | |
| 686 Return an empty list if there are no fields declared in this class. | |
| 687 Only designed for use in a debugging system. */ | |
| 688 public List getImmediateFields() { | |
| 689 // A list of Fields for each field declared in this class/interface, | |
| 690 // not including inherited fields. | |
| 3938 | 691 int length = getJavaFieldsCount(); |
| 692 List immediateFields = new ArrayList(length); | |
| 3944 | 693 for (int index = 0; index < length; index++) { |
| 0 | 694 immediateFields.add(getFieldByIndex(index)); |
| 695 } | |
| 696 | |
| 697 return immediateFields; | |
| 698 } | |
| 699 | |
| 700 /** Return a List of SA Fields for all the java fields in this class, | |
| 701 including all inherited fields. This includes hidden | |
| 702 fields. Thus the returned list can contain fields with | |
| 703 the same name. | |
| 704 Return an empty list if there are no fields. | |
| 705 Only designed for use in a debugging system. */ | |
| 706 public List getAllFields() { | |
| 707 // Contains a Field for each field in this class, including immediate | |
| 708 // fields and inherited fields. | |
| 709 List allFields = getImmediateFields(); | |
| 710 | |
| 711 // transitiveInterfaces contains all interfaces implemented | |
| 712 // by this class and its superclass chain with no duplicates. | |
| 713 | |
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714 KlassArray interfaces = getTransitiveInterfaces(); |
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715 int n = interfaces.length(); |
| 0 | 716 for (int i = 0; i < n; i++) { |
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717 InstanceKlass intf1 = (InstanceKlass) interfaces.getAt(i); |
| 0 | 718 if (Assert.ASSERTS_ENABLED) { |
| 719 Assert.that(intf1.isInterface(), "just checking type"); | |
| 720 } | |
| 721 allFields.addAll(intf1.getImmediateFields()); | |
| 722 } | |
| 723 | |
| 724 // Get all fields in the superclass, recursively. But, don't | |
| 725 // include fields in interfaces implemented by superclasses; | |
| 726 // we already have all those. | |
| 727 if (!isInterface()) { | |
| 728 InstanceKlass supr; | |
| 729 if ( (supr = (InstanceKlass) getSuper()) != null) { | |
| 730 allFields.addAll(supr.getImmediateFields()); | |
| 731 } | |
| 732 } | |
| 733 | |
| 734 return allFields; | |
| 735 } | |
| 736 | |
| 737 | |
| 738 /** Return a List of SA Methods declared directly in this class/interface. | |
| 739 Return an empty list if there are none, or if this isn't a class/ | |
| 740 interface. | |
| 741 */ | |
| 742 public List getImmediateMethods() { | |
| 743 // Contains a Method for each method declared in this class/interface | |
| 744 // not including inherited methods. | |
| 745 | |
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746 MethodArray methods = getMethods(); |
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747 int length = methods.length(); |
| 0 | 748 Object[] tmp = new Object[length]; |
| 749 | |
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750 IntArray methodOrdering = getMethodOrdering(); |
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751 if (methodOrdering.length() != length) { |
| 0 | 752 // no ordering info present |
| 753 for (int index = 0; index < length; index++) { | |
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754 tmp[index] = methods.at(index); |
| 0 | 755 } |
| 756 } else { | |
| 757 for (int index = 0; index < length; index++) { | |
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758 int originalIndex = methodOrdering.at(index); |
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759 tmp[originalIndex] = methods.at(index); |
| 0 | 760 } |
| 761 } | |
| 762 | |
| 763 return Arrays.asList(tmp); | |
| 764 } | |
| 765 | |
| 766 /** Return a List containing an SA InstanceKlass for each | |
| 767 interface named in this class's 'implements' clause. | |
| 768 */ | |
| 769 public List getDirectImplementedInterfaces() { | |
| 770 // Contains an InstanceKlass for each interface in this classes | |
| 771 // 'implements' clause. | |
| 772 | |
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773 KlassArray interfaces = getLocalInterfaces(); |
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774 int length = interfaces.length(); |
| 0 | 775 List directImplementedInterfaces = new ArrayList(length); |
| 776 | |
| 777 for (int index = 0; index < length; index ++) { | |
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778 directImplementedInterfaces.add(interfaces.getAt(index)); |
| 0 | 779 } |
| 780 | |
| 781 return directImplementedInterfaces; | |
| 782 } | |
| 783 | |
| 784 public Klass arrayKlassImpl(boolean orNull, int n) { | |
| 785 // FIXME: in reflective system this would need to change to | |
| 786 // actually allocate | |
| 787 if (getArrayKlasses() == null) { return null; } | |
| 788 ObjArrayKlass oak = (ObjArrayKlass) getArrayKlasses(); | |
| 789 if (orNull) { | |
| 790 return oak.arrayKlassOrNull(n); | |
| 791 } | |
| 792 return oak.arrayKlass(n); | |
| 793 } | |
| 794 | |
| 795 public Klass arrayKlassImpl(boolean orNull) { | |
| 796 return arrayKlassImpl(orNull, 1); | |
| 797 } | |
| 798 | |
| 799 public String signature() { | |
| 800 return "L" + super.signature() + ";"; | |
| 801 } | |
| 802 | |
| 803 /** Convenience routine taking Strings; lookup is done in | |
| 804 SymbolTable. */ | |
| 805 public Method findMethod(String name, String sig) { | |
| 806 SymbolTable syms = VM.getVM().getSymbolTable(); | |
| 807 Symbol nameSym = syms.probe(name); | |
| 808 Symbol sigSym = syms.probe(sig); | |
| 809 if (nameSym == null || sigSym == null) { | |
| 810 return null; | |
| 811 } | |
| 812 return findMethod(nameSym, sigSym); | |
| 813 } | |
| 814 | |
| 815 /** Find method in vtable. */ | |
| 816 public Method findMethod(Symbol name, Symbol sig) { | |
| 817 return findMethod(getMethods(), name, sig); | |
| 818 } | |
| 819 | |
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820 /** Breakpoint support (see methods on Method* for details) */ |
| 0 | 821 public BreakpointInfo getBreakpoints() { |
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822 Address addr = getAddress().getAddressAt(breakpoints.getOffset()); |
| 0 | 823 return (BreakpointInfo) VMObjectFactory.newObject(BreakpointInfo.class, addr); |
| 824 } | |
| 825 | |
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826 public IntArray getMethodOrdering() { |
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827 Address addr = getAddress().getAddressAt(methodOrdering.getOffset()); |
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828 return (IntArray) VMObjectFactory.newObject(IntArray.class, addr); |
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829 } |
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830 |
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831 public U2Array getFields() { |
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832 Address addr = getAddress().getAddressAt(fields.getOffset()); |
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833 return (U2Array) VMObjectFactory.newObject(U2Array.class, addr); |
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834 } |
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835 |
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836 public U2Array getInnerClasses() { |
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837 Address addr = getAddress().getAddressAt(innerClasses.getOffset()); |
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838 return (U2Array) VMObjectFactory.newObject(U2Array.class, addr); |
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839 } |
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840 |
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841 |
| 0 | 842 //---------------------------------------------------------------------- |
| 843 // Internals only below this point | |
| 844 // | |
| 845 | |
| 846 private void visitField(OopVisitor visitor, FieldType type, int index) { | |
| 847 Field f = newField(index); | |
| 848 if (type.isOop()) { | |
| 849 visitor.doOop((OopField) f, false); | |
| 850 return; | |
| 851 } | |
| 852 if (type.isByte()) { | |
| 853 visitor.doByte((ByteField) f, false); | |
| 854 return; | |
| 855 } | |
| 856 if (type.isChar()) { | |
| 857 visitor.doChar((CharField) f, false); | |
| 858 return; | |
| 859 } | |
| 860 if (type.isDouble()) { | |
| 861 visitor.doDouble((DoubleField) f, false); | |
| 862 return; | |
| 863 } | |
| 864 if (type.isFloat()) { | |
| 865 visitor.doFloat((FloatField) f, false); | |
| 866 return; | |
| 867 } | |
| 868 if (type.isInt()) { | |
| 869 visitor.doInt((IntField) f, false); | |
| 870 return; | |
| 871 } | |
| 872 if (type.isLong()) { | |
| 873 visitor.doLong((LongField) f, false); | |
| 874 return; | |
| 875 } | |
| 876 if (type.isShort()) { | |
| 877 visitor.doShort((ShortField) f, false); | |
| 878 return; | |
| 879 } | |
| 880 if (type.isBoolean()) { | |
| 881 visitor.doBoolean((BooleanField) f, false); | |
| 882 return; | |
| 883 } | |
| 884 } | |
| 885 | |
| 886 // Creates new field from index in fields TypeArray | |
| 887 private Field newField(int index) { | |
| 3944 | 888 FieldType type = new FieldType(getFieldSignature(index)); |
| 0 | 889 if (type.isOop()) { |
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890 if (VM.getVM().isCompressedOopsEnabled()) { |
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891 return new NarrowOopField(this, index); |
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892 } else { |
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893 return new OopField(this, index); |
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894 } |
| 0 | 895 } |
| 896 if (type.isByte()) { | |
| 897 return new ByteField(this, index); | |
| 898 } | |
| 899 if (type.isChar()) { | |
| 900 return new CharField(this, index); | |
| 901 } | |
| 902 if (type.isDouble()) { | |
| 903 return new DoubleField(this, index); | |
| 904 } | |
| 905 if (type.isFloat()) { | |
| 906 return new FloatField(this, index); | |
| 907 } | |
| 908 if (type.isInt()) { | |
| 909 return new IntField(this, index); | |
| 910 } | |
| 911 if (type.isLong()) { | |
| 912 return new LongField(this, index); | |
| 913 } | |
| 914 if (type.isShort()) { | |
| 915 return new ShortField(this, index); | |
| 916 } | |
| 917 if (type.isBoolean()) { | |
| 918 return new BooleanField(this, index); | |
| 919 } | |
| 920 throw new RuntimeException("Illegal field type at index " + index); | |
| 921 } | |
| 922 | |
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923 private static Method findMethod(MethodArray methods, Symbol name, Symbol signature) { |
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924 int len = methods.length(); |
| 0 | 925 // methods are sorted, so do binary search |
| 926 int l = 0; | |
| 927 int h = len - 1; | |
| 928 while (l <= h) { | |
| 929 int mid = (l + h) >> 1; | |
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930 Method m = methods.at(mid); |
| 0 | 931 int res = m.getName().fastCompare(name); |
| 932 if (res == 0) { | |
| 933 // found matching name; do linear search to find matching signature | |
| 934 // first, quick check for common case | |
| 935 if (m.getSignature().equals(signature)) return m; | |
| 936 // search downwards through overloaded methods | |
| 937 int i; | |
| 938 for (i = mid - 1; i >= l; i--) { | |
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939 Method m1 = methods.at(i); |
| 0 | 940 if (!m1.getName().equals(name)) break; |
| 941 if (m1.getSignature().equals(signature)) return m1; | |
| 942 } | |
| 943 // search upwards | |
| 944 for (i = mid + 1; i <= h; i++) { | |
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945 Method m1 = methods.at(i); |
| 0 | 946 if (!m1.getName().equals(name)) break; |
| 947 if (m1.getSignature().equals(signature)) return m1; | |
| 948 } | |
| 949 // not found | |
| 950 if (Assert.ASSERTS_ENABLED) { | |
| 951 int index = linearSearch(methods, name, signature); | |
| 952 if (index != -1) { | |
| 953 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 954 } | |
| 955 } | |
| 956 return null; | |
| 957 } else if (res < 0) { | |
| 958 l = mid + 1; | |
| 959 } else { | |
| 960 h = mid - 1; | |
| 961 } | |
| 962 } | |
| 963 if (Assert.ASSERTS_ENABLED) { | |
| 964 int index = linearSearch(methods, name, signature); | |
| 965 if (index != -1) { | |
| 966 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 967 } | |
| 968 } | |
| 969 return null; | |
| 970 } | |
| 971 | |
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972 private static int linearSearch(MethodArray methods, Symbol name, Symbol signature) { |
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973 int len = (int) methods.length(); |
| 0 | 974 for (int index = 0; index < len; index++) { |
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975 Method m = methods.at(index); |
| 0 | 976 if (m.getSignature().equals(signature) && m.getName().equals(name)) { |
| 977 return index; | |
| 978 } | |
| 979 } | |
| 980 return -1; | |
| 981 } | |
| 982 } |