Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java @ 5967:f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
Summary: Fold instanceKlass::_enclosing_method_class_index and instanceKlass::_enclosing_method_method_index into the instanceKlass::_inner_classes array.
Reviewed-by: never, coleenp
Contributed-by: Jiangli Zhou <jiangli.zhou@oracle.com>
| author | jiangli |
|---|---|
| date | Tue, 13 Mar 2012 13:50:48 -0400 |
| parents | 8f8b94305aff |
| children | 49036505ab5f |
| rev | line source |
|---|---|
| 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.memory.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.types.*; | |
| 33 import sun.jvm.hotspot.utilities.*; | |
| 34 | |
| 35 // An InstanceKlass is the VM level representation of a Java class. | |
| 36 | |
| 37 public class InstanceKlass extends Klass { | |
| 38 static { | |
| 39 VM.registerVMInitializedObserver(new Observer() { | |
| 40 public void update(Observable o, Object data) { | |
| 41 initialize(VM.getVM().getTypeDataBase()); | |
| 42 } | |
| 43 }); | |
| 44 } | |
| 45 | |
| 46 // field offset constants | |
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47 private static int ACCESS_FLAGS_OFFSET; |
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48 private static int NAME_INDEX_OFFSET; |
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49 private static int SIGNATURE_INDEX_OFFSET; |
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50 private static int INITVAL_INDEX_OFFSET; |
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51 private static int LOW_OFFSET; |
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52 private static int HIGH_OFFSET; |
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53 private static int GENERIC_SIGNATURE_INDEX_OFFSET; |
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54 private static int FIELD_SLOTS; |
| 0 | 55 public static int IMPLEMENTORS_LIMIT; |
| 56 | |
| 57 // ClassState constants | |
| 58 private static int CLASS_STATE_UNPARSABLE_BY_GC; | |
| 59 private static int CLASS_STATE_ALLOCATED; | |
| 60 private static int CLASS_STATE_LOADED; | |
| 61 private static int CLASS_STATE_LINKED; | |
| 62 private static int CLASS_STATE_BEING_INITIALIZED; | |
| 63 private static int CLASS_STATE_FULLY_INITIALIZED; | |
| 64 private static int CLASS_STATE_INITIALIZATION_ERROR; | |
| 65 | |
| 66 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 67 Type type = db.lookupType("instanceKlass"); | |
| 68 arrayKlasses = new OopField(type.getOopField("_array_klasses"), Oop.getHeaderSize()); | |
| 69 methods = new OopField(type.getOopField("_methods"), Oop.getHeaderSize()); | |
| 70 methodOrdering = new OopField(type.getOopField("_method_ordering"), Oop.getHeaderSize()); | |
| 71 localInterfaces = new OopField(type.getOopField("_local_interfaces"), Oop.getHeaderSize()); | |
| 72 transitiveInterfaces = new OopField(type.getOopField("_transitive_interfaces"), Oop.getHeaderSize()); | |
| 73 nofImplementors = new CIntField(type.getCIntegerField("_nof_implementors"), Oop.getHeaderSize()); | |
| 74 IMPLEMENTORS_LIMIT = db.lookupIntConstant("instanceKlass::implementors_limit").intValue(); | |
| 75 implementors = new OopField[IMPLEMENTORS_LIMIT]; | |
| 76 for (int i = 0; i < IMPLEMENTORS_LIMIT; i++) { | |
| 77 long arrayOffset = Oop.getHeaderSize() + (i * db.getAddressSize()); | |
| 78 implementors[i] = new OopField(type.getOopField("_implementors[0]"), arrayOffset); | |
| 79 } | |
| 80 fields = new OopField(type.getOopField("_fields"), Oop.getHeaderSize()); | |
| 3938 | 81 javaFieldsCount = new CIntField(type.getCIntegerField("_java_fields_count"), Oop.getHeaderSize()); |
| 0 | 82 constants = new OopField(type.getOopField("_constants"), Oop.getHeaderSize()); |
| 83 classLoader = new OopField(type.getOopField("_class_loader"), Oop.getHeaderSize()); | |
| 84 protectionDomain = new OopField(type.getOopField("_protection_domain"), Oop.getHeaderSize()); | |
| 85 signers = new OopField(type.getOopField("_signers"), Oop.getHeaderSize()); | |
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86 sourceFileName = type.getAddressField("_source_file_name"); |
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87 sourceDebugExtension = type.getAddressField("_source_debug_extension"); |
| 0 | 88 innerClasses = new OopField(type.getOopField("_inner_classes"), Oop.getHeaderSize()); |
| 89 nonstaticFieldSize = new CIntField(type.getCIntegerField("_nonstatic_field_size"), Oop.getHeaderSize()); | |
| 90 staticFieldSize = new CIntField(type.getCIntegerField("_static_field_size"), Oop.getHeaderSize()); | |
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91 staticOopFieldCount = new CIntField(type.getCIntegerField("_static_oop_field_count"), Oop.getHeaderSize()); |
| 0 | 92 nonstaticOopMapSize = new CIntField(type.getCIntegerField("_nonstatic_oop_map_size"), Oop.getHeaderSize()); |
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93 isMarkedDependent = new CIntField(type.getCIntegerField("_is_marked_dependent"), Oop.getHeaderSize()); |
| 0 | 94 initState = new CIntField(type.getCIntegerField("_init_state"), Oop.getHeaderSize()); |
| 95 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), Oop.getHeaderSize()); | |
| 96 itableLen = new CIntField(type.getCIntegerField("_itable_len"), Oop.getHeaderSize()); | |
| 97 breakpoints = type.getAddressField("_breakpoints"); | |
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98 genericSignature = type.getAddressField("_generic_signature"); |
| 0 | 99 majorVersion = new CIntField(type.getCIntegerField("_major_version"), Oop.getHeaderSize()); |
| 100 minorVersion = new CIntField(type.getCIntegerField("_minor_version"), Oop.getHeaderSize()); | |
| 101 headerSize = alignObjectOffset(Oop.getHeaderSize() + type.getSize()); | |
| 102 | |
| 103 // read field offset constants | |
| 3938 | 104 ACCESS_FLAGS_OFFSET = db.lookupIntConstant("FieldInfo::access_flags_offset").intValue(); |
| 105 NAME_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::name_index_offset").intValue(); | |
| 106 SIGNATURE_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::signature_index_offset").intValue(); | |
| 107 INITVAL_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::initval_index_offset").intValue(); | |
| 108 LOW_OFFSET = db.lookupIntConstant("FieldInfo::low_offset").intValue(); | |
| 109 HIGH_OFFSET = db.lookupIntConstant("FieldInfo::high_offset").intValue(); | |
| 110 GENERIC_SIGNATURE_INDEX_OFFSET = db.lookupIntConstant("FieldInfo::generic_signature_offset").intValue(); | |
| 111 FIELD_SLOTS = db.lookupIntConstant("FieldInfo::field_slots").intValue(); | |
| 0 | 112 // read ClassState constants |
| 113 CLASS_STATE_UNPARSABLE_BY_GC = db.lookupIntConstant("instanceKlass::unparsable_by_gc").intValue(); | |
| 114 CLASS_STATE_ALLOCATED = db.lookupIntConstant("instanceKlass::allocated").intValue(); | |
| 115 CLASS_STATE_LOADED = db.lookupIntConstant("instanceKlass::loaded").intValue(); | |
| 116 CLASS_STATE_LINKED = db.lookupIntConstant("instanceKlass::linked").intValue(); | |
| 117 CLASS_STATE_BEING_INITIALIZED = db.lookupIntConstant("instanceKlass::being_initialized").intValue(); | |
| 118 CLASS_STATE_FULLY_INITIALIZED = db.lookupIntConstant("instanceKlass::fully_initialized").intValue(); | |
| 119 CLASS_STATE_INITIALIZATION_ERROR = db.lookupIntConstant("instanceKlass::initialization_error").intValue(); | |
| 120 | |
| 121 } | |
| 122 | |
| 123 InstanceKlass(OopHandle handle, ObjectHeap heap) { | |
| 124 super(handle, heap); | |
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125 if (getJavaFieldsCount() != getAllFieldsCount()) { |
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126 // Exercise the injected field logic |
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127 for (int i = getJavaFieldsCount(); i < getAllFieldsCount(); i++) { |
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128 getFieldName(i); |
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129 getFieldSignature(i); |
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130 } |
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131 } |
| 0 | 132 } |
| 133 | |
| 134 private static OopField arrayKlasses; | |
| 135 private static OopField methods; | |
| 136 private static OopField methodOrdering; | |
| 137 private static OopField localInterfaces; | |
| 138 private static OopField transitiveInterfaces; | |
| 139 private static CIntField nofImplementors; | |
| 140 private static OopField[] implementors; | |
| 141 private static OopField fields; | |
| 3938 | 142 private static CIntField javaFieldsCount; |
| 0 | 143 private static OopField constants; |
| 144 private static OopField classLoader; | |
| 145 private static OopField protectionDomain; | |
| 146 private static OopField signers; | |
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147 private static AddressField sourceFileName; |
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148 private static AddressField sourceDebugExtension; |
| 0 | 149 private static OopField innerClasses; |
| 150 private static CIntField nonstaticFieldSize; | |
| 151 private static CIntField staticFieldSize; | |
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152 private static CIntField staticOopFieldCount; |
| 0 | 153 private static CIntField nonstaticOopMapSize; |
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154 private static CIntField isMarkedDependent; |
| 0 | 155 private static CIntField initState; |
| 156 private static CIntField vtableLen; | |
| 157 private static CIntField itableLen; | |
| 158 private static AddressField breakpoints; | |
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159 private static AddressField genericSignature; |
| 0 | 160 private static CIntField majorVersion; |
| 161 private static CIntField minorVersion; | |
| 162 | |
| 163 // type safe enum for ClassState from instanceKlass.hpp | |
| 164 public static class ClassState { | |
| 165 public static final ClassState UNPARSABLE_BY_GC = new ClassState("unparsable_by_gc"); | |
| 166 public static final ClassState ALLOCATED = new ClassState("allocated"); | |
| 167 public static final ClassState LOADED = new ClassState("loaded"); | |
| 168 public static final ClassState LINKED = new ClassState("linked"); | |
| 169 public static final ClassState BEING_INITIALIZED = new ClassState("beingInitialized"); | |
| 170 public static final ClassState FULLY_INITIALIZED = new ClassState("fullyInitialized"); | |
| 171 public static final ClassState INITIALIZATION_ERROR = new ClassState("initializationError"); | |
| 172 | |
| 173 private ClassState(String value) { | |
| 174 this.value = value; | |
| 175 } | |
| 176 | |
| 177 public String toString() { | |
| 178 return value; | |
| 179 } | |
| 180 | |
| 181 private String value; | |
| 182 } | |
| 183 | |
| 3939 | 184 public int getInitStateAsInt() { return (int) initState.getValue(this); } |
| 0 | 185 public ClassState getInitState() { |
| 186 int state = getInitStateAsInt(); | |
| 187 if (state == CLASS_STATE_UNPARSABLE_BY_GC) { | |
| 188 return ClassState.UNPARSABLE_BY_GC; | |
| 189 } else if (state == CLASS_STATE_ALLOCATED) { | |
| 190 return ClassState.ALLOCATED; | |
| 191 } else if (state == CLASS_STATE_LOADED) { | |
| 192 return ClassState.LOADED; | |
| 193 } else if (state == CLASS_STATE_LINKED) { | |
| 194 return ClassState.LINKED; | |
| 195 } else if (state == CLASS_STATE_BEING_INITIALIZED) { | |
| 196 return ClassState.BEING_INITIALIZED; | |
| 197 } else if (state == CLASS_STATE_FULLY_INITIALIZED) { | |
| 198 return ClassState.FULLY_INITIALIZED; | |
| 199 } else if (state == CLASS_STATE_INITIALIZATION_ERROR) { | |
| 200 return ClassState.INITIALIZATION_ERROR; | |
| 201 } else { | |
| 202 throw new RuntimeException("should not reach here"); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 // initialization state quaries | |
| 207 public boolean isLoaded() { | |
| 208 return getInitStateAsInt() >= CLASS_STATE_LOADED; | |
| 209 } | |
| 210 | |
| 211 public boolean isLinked() { | |
| 212 return getInitStateAsInt() >= CLASS_STATE_LINKED; | |
| 213 } | |
| 214 | |
| 215 public boolean isInitialized() { | |
| 216 return getInitStateAsInt() == CLASS_STATE_FULLY_INITIALIZED; | |
| 217 } | |
| 218 | |
| 219 public boolean isNotInitialized() { | |
| 220 return getInitStateAsInt() < CLASS_STATE_BEING_INITIALIZED; | |
| 221 } | |
| 222 | |
| 223 public boolean isBeingInitialized() { | |
| 224 return getInitStateAsInt() == CLASS_STATE_BEING_INITIALIZED; | |
| 225 } | |
| 226 | |
| 227 public boolean isInErrorState() { | |
| 228 return getInitStateAsInt() == CLASS_STATE_INITIALIZATION_ERROR; | |
| 229 } | |
| 230 | |
| 231 public int getClassStatus() { | |
| 232 int result = 0; | |
| 233 if (isLinked()) { | |
| 234 result |= JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED; | |
| 235 } | |
| 236 | |
| 237 if (isInitialized()) { | |
| 238 if (Assert.ASSERTS_ENABLED) { | |
| 239 Assert.that(isLinked(), "Class status is not consistent"); | |
| 240 } | |
| 241 result |= JVMDIClassStatus.INITIALIZED; | |
| 242 } | |
| 243 | |
| 244 if (isInErrorState()) { | |
| 245 result |= JVMDIClassStatus.ERROR; | |
| 246 } | |
| 247 return result; | |
| 248 } | |
| 249 | |
| 250 // Byteside of the header | |
| 251 private static long headerSize; | |
| 252 | |
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253 public long getObjectSize(Oop object) { |
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254 return getSizeHelper() * VM.getVM().getAddressSize(); |
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255 } |
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256 |
| 0 | 257 public static long getHeaderSize() { return headerSize; } |
| 258 | |
| 3938 | 259 public short getFieldAccessFlags(int index) { |
| 260 return getFields().getShortAt(index * FIELD_SLOTS + ACCESS_FLAGS_OFFSET); | |
| 261 } | |
| 262 | |
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263 public short getFieldNameIndex(int index) { |
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264 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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265 return getFields().getShortAt(index * FIELD_SLOTS + NAME_INDEX_OFFSET); |
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266 } |
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267 |
| 3938 | 268 public Symbol getFieldName(int index) { |
| 269 int nameIndex = getFields().getShortAt(index * FIELD_SLOTS + NAME_INDEX_OFFSET); | |
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270 if (index < getJavaFieldsCount()) { |
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271 return getConstants().getSymbolAt(nameIndex); |
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272 } else { |
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273 return vmSymbols.symbolAt(nameIndex); |
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274 } |
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275 } |
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276 |
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277 public short getFieldSignatureIndex(int index) { |
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278 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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279 return getFields().getShortAt(index * FIELD_SLOTS + SIGNATURE_INDEX_OFFSET); |
| 3938 | 280 } |
| 281 | |
| 282 public Symbol getFieldSignature(int index) { | |
| 283 int signatureIndex = getFields().getShortAt(index * FIELD_SLOTS + SIGNATURE_INDEX_OFFSET); | |
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284 if (index < getJavaFieldsCount()) { |
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285 return getConstants().getSymbolAt(signatureIndex); |
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286 } else { |
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287 return vmSymbols.symbolAt(signatureIndex); |
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288 } |
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289 } |
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290 |
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291 public short getFieldGenericSignatureIndex(int index) { |
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292 return getFields().getShortAt(index * FIELD_SLOTS + GENERIC_SIGNATURE_INDEX_OFFSET); |
| 3938 | 293 } |
| 294 | |
| 295 public Symbol getFieldGenericSignature(int index) { | |
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296 short genericSignatureIndex = getFieldGenericSignatureIndex(index); |
| 3938 | 297 if (genericSignatureIndex != 0) { |
| 298 return getConstants().getSymbolAt(genericSignatureIndex); | |
| 299 } | |
| 300 return null; | |
| 301 } | |
| 302 | |
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303 public short getFieldInitialValueIndex(int index) { |
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304 if (index >= getJavaFieldsCount()) throw new IndexOutOfBoundsException("not a Java field;"); |
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305 return getFields().getShortAt(index * FIELD_SLOTS + INITVAL_INDEX_OFFSET); |
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306 } |
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307 |
| 3938 | 308 public int getFieldOffset(int index) { |
| 309 TypeArray fields = getFields(); | |
| 310 return VM.getVM().buildIntFromShorts(fields.getShortAt(index * FIELD_SLOTS + LOW_OFFSET), | |
| 311 fields.getShortAt(index * FIELD_SLOTS + HIGH_OFFSET)); | |
| 312 } | |
| 313 | |
| 0 | 314 // Accessors for declared fields |
| 315 public Klass getArrayKlasses() { return (Klass) arrayKlasses.getValue(this); } | |
| 316 public ObjArray getMethods() { return (ObjArray) methods.getValue(this); } | |
| 317 public TypeArray getMethodOrdering() { return (TypeArray) methodOrdering.getValue(this); } | |
| 318 public ObjArray getLocalInterfaces() { return (ObjArray) localInterfaces.getValue(this); } | |
| 319 public ObjArray getTransitiveInterfaces() { return (ObjArray) transitiveInterfaces.getValue(this); } | |
| 320 public long nofImplementors() { return nofImplementors.getValue(this); } | |
| 321 public Klass getImplementor() { return (Klass) implementors[0].getValue(this); } | |
| 322 public Klass getImplementor(int i) { return (Klass) implementors[i].getValue(this); } | |
| 323 public TypeArray getFields() { return (TypeArray) fields.getValue(this); } | |
| 3938 | 324 public int getJavaFieldsCount() { return (int) javaFieldsCount.getValue(this); } |
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325 public int getAllFieldsCount() { return (int)getFields().getLength() / FIELD_SLOTS; } |
| 0 | 326 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } |
| 327 public Oop getClassLoader() { return classLoader.getValue(this); } | |
| 328 public Oop getProtectionDomain() { return protectionDomain.getValue(this); } | |
| 329 public ObjArray getSigners() { return (ObjArray) signers.getValue(this); } | |
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330 public Symbol getSourceFileName() { return getSymbol(sourceFileName); } |
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331 public Symbol getSourceDebugExtension(){ return getSymbol(sourceDebugExtension); } |
| 0 | 332 public TypeArray getInnerClasses() { return (TypeArray) innerClasses.getValue(this); } |
| 333 public long getNonstaticFieldSize() { return nonstaticFieldSize.getValue(this); } | |
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334 public long getStaticOopFieldCount() { return staticOopFieldCount.getValue(this); } |
| 0 | 335 public long getNonstaticOopMapSize() { return nonstaticOopMapSize.getValue(this); } |
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336 public boolean getIsMarkedDependent() { return isMarkedDependent.getValue(this) != 0; } |
| 0 | 337 public long getVtableLen() { return vtableLen.getValue(this); } |
| 338 public long getItableLen() { return itableLen.getValue(this); } | |
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339 public Symbol getGenericSignature() { return getSymbol(genericSignature); } |
| 0 | 340 public long majorVersion() { return majorVersion.getValue(this); } |
| 341 public long minorVersion() { return minorVersion.getValue(this); } | |
| 342 | |
| 343 // "size helper" == instance size in words | |
| 344 public long getSizeHelper() { | |
| 345 int lh = getLayoutHelper(); | |
| 346 if (Assert.ASSERTS_ENABLED) { | |
| 347 Assert.that(lh > 0, "layout helper initialized for instance class"); | |
| 348 } | |
| 349 return lh / VM.getVM().getAddressSize(); | |
| 350 } | |
| 351 | |
| 352 // same as enum InnerClassAttributeOffset in VM code. | |
| 353 public static interface InnerClassAttributeOffset { | |
| 354 // from JVM spec. "InnerClasses" attribute | |
| 355 public static final int innerClassInnerClassInfoOffset = 0; | |
| 356 public static final int innerClassOuterClassInfoOffset = 1; | |
| 357 public static final int innerClassInnerNameOffset = 2; | |
| 358 public static final int innerClassAccessFlagsOffset = 3; | |
| 359 public static final int innerClassNextOffset = 4; | |
| 360 }; | |
| 361 | |
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362 public static interface EnclosingMethodAttributeOffset { |
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363 public static final int enclosing_method_class_index_offset = 0; |
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364 public static final int enclosing_method_method_index_offset = 1; |
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365 public static final int enclosing_method_attribute_size = 2; |
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366 }; |
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367 |
| 0 | 368 // refer to compute_modifier_flags in VM code. |
| 369 public long computeModifierFlags() { | |
| 370 long access = getAccessFlags(); | |
| 371 // But check if it happens to be member class. | |
| 372 TypeArray innerClassList = getInnerClasses(); | |
| 373 int length = ( innerClassList == null)? 0 : (int) innerClassList.getLength(); | |
| 374 if (length > 0) { | |
| 375 if (Assert.ASSERTS_ENABLED) { | |
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376 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0 || |
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377 length % InnerClassAttributeOffset.innerClassNextOffset == EnclosingMethodAttributeOffset.enclosing_method_attribute_size, |
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378 "just checking"); |
| 0 | 379 } |
| 380 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
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381 if (i == length - EnclosingMethodAttributeOffset.enclosing_method_attribute_size) { |
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382 break; |
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383 } |
| 0 | 384 int ioff = innerClassList.getShortAt(i + |
| 385 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); | |
| 386 // 'ioff' can be zero. | |
| 387 // refer to JVM spec. section 4.7.5. | |
| 388 if (ioff != 0) { | |
| 389 // only look at classes that are already loaded | |
| 390 // since we are looking for the flags for our self. | |
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391 ConstantPool.CPSlot classInfo = getConstants().getSlotAt(ioff); |
| 0 | 392 Symbol name = null; |
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393 if (classInfo.isOop()) { |
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394 name = ((Klass) classInfo.getOop()).getName(); |
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395 } else if (classInfo.isMetaData()) { |
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396 name = classInfo.getSymbol(); |
| 0 | 397 } else { |
| 398 throw new RuntimeException("should not reach here"); | |
| 399 } | |
| 400 | |
| 401 if (name.equals(getName())) { | |
| 402 // This is really a member class | |
| 403 access = innerClassList.getShortAt(i + | |
| 404 InnerClassAttributeOffset.innerClassAccessFlagsOffset); | |
| 405 break; | |
| 406 } | |
| 407 } | |
| 408 } // for inner classes | |
| 409 } | |
| 410 | |
| 411 // Remember to strip ACC_SUPER bit | |
| 412 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 413 } | |
| 414 | |
| 415 | |
| 416 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 417 // anonymous and local classes are excluded. | |
| 418 public boolean isInnerClassName(Symbol sym) { | |
| 419 return isInInnerClasses(sym, false); | |
| 420 } | |
| 421 | |
| 422 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 423 // anonymous classes excluded, but local classes are included. | |
| 424 public boolean isInnerOrLocalClassName(Symbol sym) { | |
| 425 return isInInnerClasses(sym, true); | |
| 426 } | |
| 427 | |
| 428 private boolean isInInnerClasses(Symbol sym, boolean includeLocals) { | |
| 429 TypeArray innerClassList = getInnerClasses(); | |
| 430 int length = ( innerClassList == null)? 0 : (int) innerClassList.getLength(); | |
| 431 if (length > 0) { | |
| 432 if (Assert.ASSERTS_ENABLED) { | |
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433 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0 || |
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434 length % InnerClassAttributeOffset.innerClassNextOffset == EnclosingMethodAttributeOffset.enclosing_method_attribute_size, |
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435 "just checking"); |
| 0 | 436 } |
| 437 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
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438 if (i == length - EnclosingMethodAttributeOffset.enclosing_method_attribute_size) { |
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439 break; |
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440 } |
| 0 | 441 int ioff = innerClassList.getShortAt(i + |
| 442 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); | |
| 443 // 'ioff' can be zero. | |
| 444 // refer to JVM spec. section 4.7.5. | |
| 445 if (ioff != 0) { | |
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446 ConstantPool.CPSlot iclassInfo = getConstants().getSlotAt(ioff); |
| 0 | 447 Symbol innerName = null; |
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448 if (iclassInfo.isOop()) { |
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449 innerName = ((Klass) iclassInfo.getOop()).getName(); |
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450 } else if (iclassInfo.isMetaData()) { |
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451 innerName = iclassInfo.getSymbol(); |
| 0 | 452 } else { |
| 453 throw new RuntimeException("should not reach here"); | |
| 454 } | |
| 455 | |
| 456 Symbol myname = getName(); | |
| 457 int ooff = innerClassList.getShortAt(i + | |
| 458 InnerClassAttributeOffset.innerClassOuterClassInfoOffset); | |
| 459 // for anonymous classes inner_name_index of InnerClasses | |
| 460 // attribute is zero. | |
| 461 int innerNameIndex = innerClassList.getShortAt(i + | |
| 462 InnerClassAttributeOffset.innerClassInnerNameOffset); | |
| 463 // if this is not a member (anonymous, local etc.), 'ooff' will be zero | |
| 464 // refer to JVM spec. section 4.7.5. | |
| 465 if (ooff == 0) { | |
| 466 if (includeLocals) { | |
| 467 // does it looks like my local class? | |
| 468 if (innerName.equals(sym) && | |
| 469 innerName.asString().startsWith(myname.asString())) { | |
| 470 // exclude anonymous classes. | |
| 471 return (innerNameIndex != 0); | |
| 472 } | |
| 473 } | |
| 474 } else { | |
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475 ConstantPool.CPSlot oclassInfo = getConstants().getSlotAt(ooff); |
| 0 | 476 Symbol outerName = null; |
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477 if (oclassInfo.isOop()) { |
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478 outerName = ((Klass) oclassInfo.getOop()).getName(); |
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479 } else if (oclassInfo.isMetaData()) { |
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480 outerName = oclassInfo.getSymbol(); |
| 0 | 481 } else { |
| 482 throw new RuntimeException("should not reach here"); | |
| 483 } | |
| 484 | |
| 485 // include only if current class is outer class. | |
| 486 if (outerName.equals(myname) && innerName.equals(sym)) { | |
| 487 return true; | |
| 488 } | |
| 489 } | |
| 490 } | |
| 491 } // for inner classes | |
| 492 return false; | |
| 493 } else { | |
| 494 return false; | |
| 495 } | |
| 496 } | |
| 497 | |
| 498 public boolean implementsInterface(Klass k) { | |
| 499 if (Assert.ASSERTS_ENABLED) { | |
| 500 Assert.that(k.isInterface(), "should not reach here"); | |
| 501 } | |
| 502 ObjArray interfaces = getTransitiveInterfaces(); | |
| 503 final int len = (int) interfaces.getLength(); | |
| 504 for (int i = 0; i < len; i++) { | |
| 505 if (interfaces.getObjAt(i).equals(k)) return true; | |
| 506 } | |
| 507 return false; | |
| 508 } | |
| 509 | |
| 510 boolean computeSubtypeOf(Klass k) { | |
| 511 if (k.isInterface()) { | |
| 512 return implementsInterface(k); | |
| 513 } else { | |
| 514 return super.computeSubtypeOf(k); | |
| 515 } | |
| 516 } | |
| 517 | |
| 518 public void printValueOn(PrintStream tty) { | |
| 519 tty.print("InstanceKlass for " + getName().asString()); | |
| 520 } | |
| 521 | |
| 522 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 523 super.iterateFields(visitor, doVMFields); | |
| 524 if (doVMFields) { | |
| 525 visitor.doOop(arrayKlasses, true); | |
| 526 visitor.doOop(methods, true); | |
| 527 visitor.doOop(methodOrdering, true); | |
| 528 visitor.doOop(localInterfaces, true); | |
| 529 visitor.doOop(transitiveInterfaces, true); | |
| 530 visitor.doCInt(nofImplementors, true); | |
| 531 for (int i = 0; i < IMPLEMENTORS_LIMIT; i++) | |
| 532 visitor.doOop(implementors[i], true); | |
| 533 visitor.doOop(fields, true); | |
| 534 visitor.doOop(constants, true); | |
| 535 visitor.doOop(classLoader, true); | |
| 536 visitor.doOop(protectionDomain, true); | |
| 537 visitor.doOop(signers, true); | |
| 538 visitor.doOop(innerClasses, true); | |
| 539 visitor.doCInt(nonstaticFieldSize, true); | |
| 540 visitor.doCInt(staticFieldSize, true); | |
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541 visitor.doCInt(staticOopFieldCount, true); |
| 0 | 542 visitor.doCInt(nonstaticOopMapSize, true); |
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543 visitor.doCInt(isMarkedDependent, true); |
| 0 | 544 visitor.doCInt(initState, true); |
| 545 visitor.doCInt(vtableLen, true); | |
| 546 visitor.doCInt(itableLen, true); | |
| 547 } | |
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548 } |
| 0 | 549 |
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550 /* |
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551 * Visit the static fields of this InstanceKlass with the obj of |
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552 * the visitor set to the oop holding the fields, which is |
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553 * currently the java mirror. |
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554 */ |
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555 public void iterateStaticFields(OopVisitor visitor) { |
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556 visitor.setObj(getJavaMirror()); |
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557 visitor.prologue(); |
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558 iterateStaticFieldsInternal(visitor); |
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559 visitor.epilogue(); |
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560 |
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561 } |
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562 |
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563 void iterateStaticFieldsInternal(OopVisitor visitor) { |
| 3938 | 564 int length = getJavaFieldsCount(); |
| 3944 | 565 for (int index = 0; index < length; index++) { |
| 566 short accessFlags = getFieldAccessFlags(index); | |
| 567 FieldType type = new FieldType(getFieldSignature(index)); | |
| 0 | 568 AccessFlags access = new AccessFlags(accessFlags); |
| 569 if (access.isStatic()) { | |
| 570 visitField(visitor, type, index); | |
| 571 } | |
| 572 } | |
| 573 } | |
| 574 | |
| 575 public Klass getJavaSuper() { | |
| 576 return getSuper(); | |
| 577 } | |
| 578 | |
| 3939 | 579 public static class StaticField { |
| 580 public AccessFlags flags; | |
| 581 public Field field; | |
| 582 | |
| 583 StaticField(Field field, AccessFlags flags) { | |
| 584 this.field = field; | |
| 585 this.flags = flags; | |
| 586 } | |
| 587 } | |
| 588 | |
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589 public void iterateNonStaticFields(OopVisitor visitor, Oop obj) { |
| 0 | 590 if (getSuper() != null) { |
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591 ((InstanceKlass) getSuper()).iterateNonStaticFields(visitor, obj); |
| 0 | 592 } |
| 3938 | 593 int length = getJavaFieldsCount(); |
| 3944 | 594 for (int index = 0; index < length; index++) { |
| 595 short accessFlags = getFieldAccessFlags(index); | |
| 596 FieldType type = new FieldType(getFieldSignature(index)); | |
| 0 | 597 AccessFlags access = new AccessFlags(accessFlags); |
| 598 if (!access.isStatic()) { | |
| 599 visitField(visitor, type, index); | |
| 600 } | |
| 601 } | |
| 602 } | |
| 603 | |
| 604 /** Field access by name. */ | |
| 605 public Field findLocalField(Symbol name, Symbol sig) { | |
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606 int length = getJavaFieldsCount(); |
| 3944 | 607 for (int i = 0; i < length; i++) { |
| 608 Symbol f_name = getFieldName(i); | |
| 609 Symbol f_sig = getFieldSignature(i); | |
| 0 | 610 if (name.equals(f_name) && sig.equals(f_sig)) { |
| 611 return newField(i); | |
| 612 } | |
| 613 } | |
| 614 | |
| 615 return null; | |
| 616 } | |
| 617 | |
| 618 /** Find field in direct superinterfaces. */ | |
| 619 public Field findInterfaceField(Symbol name, Symbol sig) { | |
| 620 ObjArray interfaces = getLocalInterfaces(); | |
| 621 int n = (int) interfaces.getLength(); | |
| 622 for (int i = 0; i < n; i++) { | |
| 623 InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i); | |
| 624 if (Assert.ASSERTS_ENABLED) { | |
| 625 Assert.that(intf1.isInterface(), "just checking type"); | |
| 626 } | |
| 627 // search for field in current interface | |
| 628 Field f = intf1.findLocalField(name, sig); | |
| 629 if (f != null) { | |
| 630 if (Assert.ASSERTS_ENABLED) { | |
| 631 Assert.that(f.getAccessFlagsObj().isStatic(), "interface field must be static"); | |
| 632 } | |
| 633 return f; | |
| 634 } | |
| 635 // search for field in direct superinterfaces | |
| 636 f = intf1.findInterfaceField(name, sig); | |
| 637 if (f != null) return f; | |
| 638 } | |
| 639 // otherwise field lookup fails | |
| 640 return null; | |
| 641 } | |
| 642 | |
| 643 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 644 which the field is defined. */ | |
| 645 public Field findField(Symbol name, Symbol sig) { | |
| 646 // search order according to newest JVM spec (5.4.3.2, p.167). | |
| 647 // 1) search for field in current klass | |
| 648 Field f = findLocalField(name, sig); | |
| 649 if (f != null) return f; | |
| 650 | |
| 651 // 2) search for field recursively in direct superinterfaces | |
| 652 f = findInterfaceField(name, sig); | |
| 653 if (f != null) return f; | |
| 654 | |
| 655 // 3) apply field lookup recursively if superclass exists | |
| 656 InstanceKlass supr = (InstanceKlass) getSuper(); | |
| 657 if (supr != null) return supr.findField(name, sig); | |
| 658 | |
| 659 // 4) otherwise field lookup fails | |
| 660 return null; | |
| 661 } | |
| 662 | |
| 663 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 664 which the field is defined (convenience routine) */ | |
| 665 public Field findField(String name, String sig) { | |
| 666 SymbolTable symbols = VM.getVM().getSymbolTable(); | |
| 667 Symbol nameSym = symbols.probe(name); | |
| 668 Symbol sigSym = symbols.probe(sig); | |
| 669 if (nameSym == null || sigSym == null) { | |
| 670 return null; | |
| 671 } | |
| 672 return findField(nameSym, sigSym); | |
| 673 } | |
| 674 | |
| 675 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 676 which the field is defined (retained only for backward | |
| 677 compatibility with jdbx) */ | |
| 678 public Field findFieldDbg(String name, String sig) { | |
| 679 return findField(name, sig); | |
| 680 } | |
| 681 | |
| 682 /** Get field by its index in the fields array. Only designed for | |
| 683 use in a debugging system. */ | |
| 3944 | 684 public Field getFieldByIndex(int fieldIndex) { |
| 685 return newField(fieldIndex); | |
| 0 | 686 } |
| 687 | |
| 688 | |
| 689 /** Return a List of SA Fields for the fields declared in this class. | |
| 690 Inherited fields are not included. | |
| 691 Return an empty list if there are no fields declared in this class. | |
| 692 Only designed for use in a debugging system. */ | |
| 693 public List getImmediateFields() { | |
| 694 // A list of Fields for each field declared in this class/interface, | |
| 695 // not including inherited fields. | |
| 3938 | 696 int length = getJavaFieldsCount(); |
| 697 List immediateFields = new ArrayList(length); | |
| 3944 | 698 for (int index = 0; index < length; index++) { |
| 0 | 699 immediateFields.add(getFieldByIndex(index)); |
| 700 } | |
| 701 | |
| 702 return immediateFields; | |
| 703 } | |
| 704 | |
| 705 /** Return a List of SA Fields for all the java fields in this class, | |
| 706 including all inherited fields. This includes hidden | |
| 707 fields. Thus the returned list can contain fields with | |
| 708 the same name. | |
| 709 Return an empty list if there are no fields. | |
| 710 Only designed for use in a debugging system. */ | |
| 711 public List getAllFields() { | |
| 712 // Contains a Field for each field in this class, including immediate | |
| 713 // fields and inherited fields. | |
| 714 List allFields = getImmediateFields(); | |
| 715 | |
| 716 // transitiveInterfaces contains all interfaces implemented | |
| 717 // by this class and its superclass chain with no duplicates. | |
| 718 | |
| 719 ObjArray interfaces = getTransitiveInterfaces(); | |
| 720 int n = (int) interfaces.getLength(); | |
| 721 for (int i = 0; i < n; i++) { | |
| 722 InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i); | |
| 723 if (Assert.ASSERTS_ENABLED) { | |
| 724 Assert.that(intf1.isInterface(), "just checking type"); | |
| 725 } | |
| 726 allFields.addAll(intf1.getImmediateFields()); | |
| 727 } | |
| 728 | |
| 729 // Get all fields in the superclass, recursively. But, don't | |
| 730 // include fields in interfaces implemented by superclasses; | |
| 731 // we already have all those. | |
| 732 if (!isInterface()) { | |
| 733 InstanceKlass supr; | |
| 734 if ( (supr = (InstanceKlass) getSuper()) != null) { | |
| 735 allFields.addAll(supr.getImmediateFields()); | |
| 736 } | |
| 737 } | |
| 738 | |
| 739 return allFields; | |
| 740 } | |
| 741 | |
| 742 | |
| 743 /** Return a List of SA Methods declared directly in this class/interface. | |
| 744 Return an empty list if there are none, or if this isn't a class/ | |
| 745 interface. | |
| 746 */ | |
| 747 public List getImmediateMethods() { | |
| 748 // Contains a Method for each method declared in this class/interface | |
| 749 // not including inherited methods. | |
| 750 | |
| 751 ObjArray methods = getMethods(); | |
| 752 int length = (int)methods.getLength(); | |
| 753 Object[] tmp = new Object[length]; | |
| 754 | |
| 755 TypeArray methodOrdering = getMethodOrdering(); | |
| 756 if (methodOrdering.getLength() != length) { | |
| 757 // no ordering info present | |
| 758 for (int index = 0; index < length; index++) { | |
| 759 tmp[index] = methods.getObjAt(index); | |
| 760 } | |
| 761 } else { | |
| 762 for (int index = 0; index < length; index++) { | |
| 763 int originalIndex = getMethodOrdering().getIntAt(index); | |
| 764 tmp[originalIndex] = methods.getObjAt(index); | |
| 765 } | |
| 766 } | |
| 767 | |
| 768 return Arrays.asList(tmp); | |
| 769 } | |
| 770 | |
| 771 /** Return a List containing an SA InstanceKlass for each | |
| 772 interface named in this class's 'implements' clause. | |
| 773 */ | |
| 774 public List getDirectImplementedInterfaces() { | |
| 775 // Contains an InstanceKlass for each interface in this classes | |
| 776 // 'implements' clause. | |
| 777 | |
| 778 ObjArray interfaces = getLocalInterfaces(); | |
| 779 int length = (int) interfaces.getLength(); | |
| 780 List directImplementedInterfaces = new ArrayList(length); | |
| 781 | |
| 782 for (int index = 0; index < length; index ++) { | |
| 783 directImplementedInterfaces.add(interfaces.getObjAt(index)); | |
| 784 } | |
| 785 | |
| 786 return directImplementedInterfaces; | |
| 787 } | |
| 788 | |
| 789 | |
| 790 public long getObjectSize() { | |
| 791 long bodySize = alignObjectOffset(getVtableLen() * getHeap().getOopSize()) | |
| 792 + alignObjectOffset(getItableLen() * getHeap().getOopSize()) | |
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793 + (getNonstaticOopMapSize()) * getHeap().getOopSize(); |
| 0 | 794 return alignObjectSize(headerSize + bodySize); |
| 795 } | |
| 796 | |
| 797 public Klass arrayKlassImpl(boolean orNull, int n) { | |
| 798 // FIXME: in reflective system this would need to change to | |
| 799 // actually allocate | |
| 800 if (getArrayKlasses() == null) { return null; } | |
| 801 ObjArrayKlass oak = (ObjArrayKlass) getArrayKlasses(); | |
| 802 if (orNull) { | |
| 803 return oak.arrayKlassOrNull(n); | |
| 804 } | |
| 805 return oak.arrayKlass(n); | |
| 806 } | |
| 807 | |
| 808 public Klass arrayKlassImpl(boolean orNull) { | |
| 809 return arrayKlassImpl(orNull, 1); | |
| 810 } | |
| 811 | |
| 812 public String signature() { | |
| 813 return "L" + super.signature() + ";"; | |
| 814 } | |
| 815 | |
| 816 /** Convenience routine taking Strings; lookup is done in | |
| 817 SymbolTable. */ | |
| 818 public Method findMethod(String name, String sig) { | |
| 819 SymbolTable syms = VM.getVM().getSymbolTable(); | |
| 820 Symbol nameSym = syms.probe(name); | |
| 821 Symbol sigSym = syms.probe(sig); | |
| 822 if (nameSym == null || sigSym == null) { | |
| 823 return null; | |
| 824 } | |
| 825 return findMethod(nameSym, sigSym); | |
| 826 } | |
| 827 | |
| 828 /** Find method in vtable. */ | |
| 829 public Method findMethod(Symbol name, Symbol sig) { | |
| 830 return findMethod(getMethods(), name, sig); | |
| 831 } | |
| 832 | |
| 833 /** Breakpoint support (see methods on methodOop for details) */ | |
| 834 public BreakpointInfo getBreakpoints() { | |
| 835 Address addr = getHandle().getAddressAt(Oop.getHeaderSize() + breakpoints.getOffset()); | |
| 836 return (BreakpointInfo) VMObjectFactory.newObject(BreakpointInfo.class, addr); | |
| 837 } | |
| 838 | |
| 839 //---------------------------------------------------------------------- | |
| 840 // Internals only below this point | |
| 841 // | |
| 842 | |
| 843 private void visitField(OopVisitor visitor, FieldType type, int index) { | |
| 844 Field f = newField(index); | |
| 845 if (type.isOop()) { | |
| 846 visitor.doOop((OopField) f, false); | |
| 847 return; | |
| 848 } | |
| 849 if (type.isByte()) { | |
| 850 visitor.doByte((ByteField) f, false); | |
| 851 return; | |
| 852 } | |
| 853 if (type.isChar()) { | |
| 854 visitor.doChar((CharField) f, false); | |
| 855 return; | |
| 856 } | |
| 857 if (type.isDouble()) { | |
| 858 visitor.doDouble((DoubleField) f, false); | |
| 859 return; | |
| 860 } | |
| 861 if (type.isFloat()) { | |
| 862 visitor.doFloat((FloatField) f, false); | |
| 863 return; | |
| 864 } | |
| 865 if (type.isInt()) { | |
| 866 visitor.doInt((IntField) f, false); | |
| 867 return; | |
| 868 } | |
| 869 if (type.isLong()) { | |
| 870 visitor.doLong((LongField) f, false); | |
| 871 return; | |
| 872 } | |
| 873 if (type.isShort()) { | |
| 874 visitor.doShort((ShortField) f, false); | |
| 875 return; | |
| 876 } | |
| 877 if (type.isBoolean()) { | |
| 878 visitor.doBoolean((BooleanField) f, false); | |
| 879 return; | |
| 880 } | |
| 881 } | |
| 882 | |
| 883 // Creates new field from index in fields TypeArray | |
| 884 private Field newField(int index) { | |
| 3944 | 885 FieldType type = new FieldType(getFieldSignature(index)); |
| 0 | 886 if (type.isOop()) { |
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887 if (VM.getVM().isCompressedOopsEnabled()) { |
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888 return new NarrowOopField(this, index); |
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889 } else { |
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890 return new OopField(this, index); |
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891 } |
| 0 | 892 } |
| 893 if (type.isByte()) { | |
| 894 return new ByteField(this, index); | |
| 895 } | |
| 896 if (type.isChar()) { | |
| 897 return new CharField(this, index); | |
| 898 } | |
| 899 if (type.isDouble()) { | |
| 900 return new DoubleField(this, index); | |
| 901 } | |
| 902 if (type.isFloat()) { | |
| 903 return new FloatField(this, index); | |
| 904 } | |
| 905 if (type.isInt()) { | |
| 906 return new IntField(this, index); | |
| 907 } | |
| 908 if (type.isLong()) { | |
| 909 return new LongField(this, index); | |
| 910 } | |
| 911 if (type.isShort()) { | |
| 912 return new ShortField(this, index); | |
| 913 } | |
| 914 if (type.isBoolean()) { | |
| 915 return new BooleanField(this, index); | |
| 916 } | |
| 917 throw new RuntimeException("Illegal field type at index " + index); | |
| 918 } | |
| 919 | |
| 920 private static Method findMethod(ObjArray methods, Symbol name, Symbol signature) { | |
| 921 int len = (int) methods.getLength(); | |
| 922 // methods are sorted, so do binary search | |
| 923 int l = 0; | |
| 924 int h = len - 1; | |
| 925 while (l <= h) { | |
| 926 int mid = (l + h) >> 1; | |
| 927 Method m = (Method) methods.getObjAt(mid); | |
| 928 int res = m.getName().fastCompare(name); | |
| 929 if (res == 0) { | |
| 930 // found matching name; do linear search to find matching signature | |
| 931 // first, quick check for common case | |
| 932 if (m.getSignature().equals(signature)) return m; | |
| 933 // search downwards through overloaded methods | |
| 934 int i; | |
| 935 for (i = mid - 1; i >= l; i--) { | |
| 936 Method m1 = (Method) methods.getObjAt(i); | |
| 937 if (!m1.getName().equals(name)) break; | |
| 938 if (m1.getSignature().equals(signature)) return m1; | |
| 939 } | |
| 940 // search upwards | |
| 941 for (i = mid + 1; i <= h; i++) { | |
| 942 Method m1 = (Method) methods.getObjAt(i); | |
| 943 if (!m1.getName().equals(name)) break; | |
| 944 if (m1.getSignature().equals(signature)) return m1; | |
| 945 } | |
| 946 // not found | |
| 947 if (Assert.ASSERTS_ENABLED) { | |
| 948 int index = linearSearch(methods, name, signature); | |
| 949 if (index != -1) { | |
| 950 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 951 } | |
| 952 } | |
| 953 return null; | |
| 954 } else if (res < 0) { | |
| 955 l = mid + 1; | |
| 956 } else { | |
| 957 h = mid - 1; | |
| 958 } | |
| 959 } | |
| 960 if (Assert.ASSERTS_ENABLED) { | |
| 961 int index = linearSearch(methods, name, signature); | |
| 962 if (index != -1) { | |
| 963 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 964 } | |
| 965 } | |
| 966 return null; | |
| 967 } | |
| 968 | |
| 969 private static int linearSearch(ObjArray methods, Symbol name, Symbol signature) { | |
| 970 int len = (int) methods.getLength(); | |
| 971 for (int index = 0; index < len; index++) { | |
| 972 Method m = (Method) methods.getObjAt(index); | |
| 973 if (m.getSignature().equals(signature) && m.getName().equals(name)) { | |
| 974 return index; | |
| 975 } | |
| 976 } | |
| 977 return -1; | |
| 978 } | |
| 979 } |