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annotate agent/src/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | d1605aabd0a1 |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2008, 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 | |
| 47 public static int ACCESS_FLAGS_OFFSET; | |
| 48 public static int NAME_INDEX_OFFSET; | |
| 49 public static int SIGNATURE_INDEX_OFFSET; | |
| 50 public static int INITVAL_INDEX_OFFSET; | |
| 51 public static int LOW_OFFSET; | |
| 52 public static int HIGH_OFFSET; | |
| 53 public static int GENERIC_SIGNATURE_INDEX_OFFSET; | |
| 54 public static int NEXT_OFFSET; | |
| 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()); | |
| 81 constants = new OopField(type.getOopField("_constants"), Oop.getHeaderSize()); | |
| 82 classLoader = new OopField(type.getOopField("_class_loader"), Oop.getHeaderSize()); | |
| 83 protectionDomain = new OopField(type.getOopField("_protection_domain"), Oop.getHeaderSize()); | |
| 84 signers = new OopField(type.getOopField("_signers"), Oop.getHeaderSize()); | |
| 85 sourceFileName = new OopField(type.getOopField("_source_file_name"), Oop.getHeaderSize()); | |
| 86 sourceDebugExtension = new OopField(type.getOopField("_source_debug_extension"), Oop.getHeaderSize()); | |
| 87 innerClasses = new OopField(type.getOopField("_inner_classes"), Oop.getHeaderSize()); | |
| 88 nonstaticFieldSize = new CIntField(type.getCIntegerField("_nonstatic_field_size"), Oop.getHeaderSize()); | |
| 89 staticFieldSize = new CIntField(type.getCIntegerField("_static_field_size"), Oop.getHeaderSize()); | |
| 90 staticOopFieldSize = new CIntField(type.getCIntegerField("_static_oop_field_size"), Oop.getHeaderSize()); | |
| 91 nonstaticOopMapSize = new CIntField(type.getCIntegerField("_nonstatic_oop_map_size"), Oop.getHeaderSize()); | |
| 92 isMarkedDependent = new CIntField(type.getCIntegerField("_is_marked_dependent"), Oop.getHeaderSize()); | |
| 93 initState = new CIntField(type.getCIntegerField("_init_state"), Oop.getHeaderSize()); | |
| 94 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), Oop.getHeaderSize()); | |
| 95 itableLen = new CIntField(type.getCIntegerField("_itable_len"), Oop.getHeaderSize()); | |
| 96 breakpoints = type.getAddressField("_breakpoints"); | |
| 97 genericSignature = new OopField(type.getOopField("_generic_signature"), Oop.getHeaderSize()); | |
| 98 majorVersion = new CIntField(type.getCIntegerField("_major_version"), Oop.getHeaderSize()); | |
| 99 minorVersion = new CIntField(type.getCIntegerField("_minor_version"), Oop.getHeaderSize()); | |
| 100 headerSize = alignObjectOffset(Oop.getHeaderSize() + type.getSize()); | |
| 101 | |
| 102 // read field offset constants | |
| 103 ACCESS_FLAGS_OFFSET = db.lookupIntConstant("instanceKlass::access_flags_offset").intValue(); | |
| 104 NAME_INDEX_OFFSET = db.lookupIntConstant("instanceKlass::name_index_offset").intValue(); | |
| 105 SIGNATURE_INDEX_OFFSET = db.lookupIntConstant("instanceKlass::signature_index_offset").intValue(); | |
| 106 INITVAL_INDEX_OFFSET = db.lookupIntConstant("instanceKlass::initval_index_offset").intValue(); | |
| 107 LOW_OFFSET = db.lookupIntConstant("instanceKlass::low_offset").intValue(); | |
| 108 HIGH_OFFSET = db.lookupIntConstant("instanceKlass::high_offset").intValue(); | |
| 109 GENERIC_SIGNATURE_INDEX_OFFSET = db.lookupIntConstant("instanceKlass::generic_signature_offset").intValue(); | |
| 110 NEXT_OFFSET = db.lookupIntConstant("instanceKlass::next_offset").intValue(); | |
| 111 // read ClassState constants | |
| 112 CLASS_STATE_UNPARSABLE_BY_GC = db.lookupIntConstant("instanceKlass::unparsable_by_gc").intValue(); | |
| 113 CLASS_STATE_ALLOCATED = db.lookupIntConstant("instanceKlass::allocated").intValue(); | |
| 114 CLASS_STATE_LOADED = db.lookupIntConstant("instanceKlass::loaded").intValue(); | |
| 115 CLASS_STATE_LINKED = db.lookupIntConstant("instanceKlass::linked").intValue(); | |
| 116 CLASS_STATE_BEING_INITIALIZED = db.lookupIntConstant("instanceKlass::being_initialized").intValue(); | |
| 117 CLASS_STATE_FULLY_INITIALIZED = db.lookupIntConstant("instanceKlass::fully_initialized").intValue(); | |
| 118 CLASS_STATE_INITIALIZATION_ERROR = db.lookupIntConstant("instanceKlass::initialization_error").intValue(); | |
| 119 | |
| 120 } | |
| 121 | |
| 122 InstanceKlass(OopHandle handle, ObjectHeap heap) { | |
| 123 super(handle, heap); | |
| 124 } | |
| 125 | |
| 126 private static OopField arrayKlasses; | |
| 127 private static OopField methods; | |
| 128 private static OopField methodOrdering; | |
| 129 private static OopField localInterfaces; | |
| 130 private static OopField transitiveInterfaces; | |
| 131 private static CIntField nofImplementors; | |
| 132 private static OopField[] implementors; | |
| 133 private static OopField fields; | |
| 134 private static OopField constants; | |
| 135 private static OopField classLoader; | |
| 136 private static OopField protectionDomain; | |
| 137 private static OopField signers; | |
| 138 private static OopField sourceFileName; | |
| 139 private static OopField sourceDebugExtension; | |
| 140 private static OopField innerClasses; | |
| 141 private static CIntField nonstaticFieldSize; | |
| 142 private static CIntField staticFieldSize; | |
| 143 private static CIntField staticOopFieldSize; | |
| 144 private static CIntField nonstaticOopMapSize; | |
| 145 private static CIntField isMarkedDependent; | |
| 146 private static CIntField initState; | |
| 147 private static CIntField vtableLen; | |
| 148 private static CIntField itableLen; | |
| 149 private static AddressField breakpoints; | |
| 150 private static OopField genericSignature; | |
| 151 private static CIntField majorVersion; | |
| 152 private static CIntField minorVersion; | |
| 153 | |
| 154 // type safe enum for ClassState from instanceKlass.hpp | |
| 155 public static class ClassState { | |
| 156 public static final ClassState UNPARSABLE_BY_GC = new ClassState("unparsable_by_gc"); | |
| 157 public static final ClassState ALLOCATED = new ClassState("allocated"); | |
| 158 public static final ClassState LOADED = new ClassState("loaded"); | |
| 159 public static final ClassState LINKED = new ClassState("linked"); | |
| 160 public static final ClassState BEING_INITIALIZED = new ClassState("beingInitialized"); | |
| 161 public static final ClassState FULLY_INITIALIZED = new ClassState("fullyInitialized"); | |
| 162 public static final ClassState INITIALIZATION_ERROR = new ClassState("initializationError"); | |
| 163 | |
| 164 private ClassState(String value) { | |
| 165 this.value = value; | |
| 166 } | |
| 167 | |
| 168 public String toString() { | |
| 169 return value; | |
| 170 } | |
| 171 | |
| 172 private String value; | |
| 173 } | |
| 174 | |
| 175 private int getInitStateAsInt() { return (int) initState.getValue(this); } | |
| 176 public ClassState getInitState() { | |
| 177 int state = getInitStateAsInt(); | |
| 178 if (state == CLASS_STATE_UNPARSABLE_BY_GC) { | |
| 179 return ClassState.UNPARSABLE_BY_GC; | |
| 180 } else if (state == CLASS_STATE_ALLOCATED) { | |
| 181 return ClassState.ALLOCATED; | |
| 182 } else if (state == CLASS_STATE_LOADED) { | |
| 183 return ClassState.LOADED; | |
| 184 } else if (state == CLASS_STATE_LINKED) { | |
| 185 return ClassState.LINKED; | |
| 186 } else if (state == CLASS_STATE_BEING_INITIALIZED) { | |
| 187 return ClassState.BEING_INITIALIZED; | |
| 188 } else if (state == CLASS_STATE_FULLY_INITIALIZED) { | |
| 189 return ClassState.FULLY_INITIALIZED; | |
| 190 } else if (state == CLASS_STATE_INITIALIZATION_ERROR) { | |
| 191 return ClassState.INITIALIZATION_ERROR; | |
| 192 } else { | |
| 193 throw new RuntimeException("should not reach here"); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 // initialization state quaries | |
| 198 public boolean isLoaded() { | |
| 199 return getInitStateAsInt() >= CLASS_STATE_LOADED; | |
| 200 } | |
| 201 | |
| 202 public boolean isLinked() { | |
| 203 return getInitStateAsInt() >= CLASS_STATE_LINKED; | |
| 204 } | |
| 205 | |
| 206 public boolean isInitialized() { | |
| 207 return getInitStateAsInt() == CLASS_STATE_FULLY_INITIALIZED; | |
| 208 } | |
| 209 | |
| 210 public boolean isNotInitialized() { | |
| 211 return getInitStateAsInt() < CLASS_STATE_BEING_INITIALIZED; | |
| 212 } | |
| 213 | |
| 214 public boolean isBeingInitialized() { | |
| 215 return getInitStateAsInt() == CLASS_STATE_BEING_INITIALIZED; | |
| 216 } | |
| 217 | |
| 218 public boolean isInErrorState() { | |
| 219 return getInitStateAsInt() == CLASS_STATE_INITIALIZATION_ERROR; | |
| 220 } | |
| 221 | |
| 222 public int getClassStatus() { | |
| 223 int result = 0; | |
| 224 if (isLinked()) { | |
| 225 result |= JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED; | |
| 226 } | |
| 227 | |
| 228 if (isInitialized()) { | |
| 229 if (Assert.ASSERTS_ENABLED) { | |
| 230 Assert.that(isLinked(), "Class status is not consistent"); | |
| 231 } | |
| 232 result |= JVMDIClassStatus.INITIALIZED; | |
| 233 } | |
| 234 | |
| 235 if (isInErrorState()) { | |
| 236 result |= JVMDIClassStatus.ERROR; | |
| 237 } | |
| 238 return result; | |
| 239 } | |
| 240 | |
| 241 // Byteside of the header | |
| 242 private static long headerSize; | |
| 243 | |
| 244 public static long getHeaderSize() { return headerSize; } | |
| 245 | |
| 246 // Accessors for declared fields | |
| 247 public Klass getArrayKlasses() { return (Klass) arrayKlasses.getValue(this); } | |
| 248 public ObjArray getMethods() { return (ObjArray) methods.getValue(this); } | |
| 249 public TypeArray getMethodOrdering() { return (TypeArray) methodOrdering.getValue(this); } | |
| 250 public ObjArray getLocalInterfaces() { return (ObjArray) localInterfaces.getValue(this); } | |
| 251 public ObjArray getTransitiveInterfaces() { return (ObjArray) transitiveInterfaces.getValue(this); } | |
| 252 public long nofImplementors() { return nofImplementors.getValue(this); } | |
| 253 public Klass getImplementor() { return (Klass) implementors[0].getValue(this); } | |
| 254 public Klass getImplementor(int i) { return (Klass) implementors[i].getValue(this); } | |
| 255 public TypeArray getFields() { return (TypeArray) fields.getValue(this); } | |
| 256 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } | |
| 257 public Oop getClassLoader() { return classLoader.getValue(this); } | |
| 258 public Oop getProtectionDomain() { return protectionDomain.getValue(this); } | |
| 259 public ObjArray getSigners() { return (ObjArray) signers.getValue(this); } | |
| 260 public Symbol getSourceFileName() { return (Symbol) sourceFileName.getValue(this); } | |
| 261 public Symbol getSourceDebugExtension(){ return (Symbol) sourceDebugExtension.getValue(this); } | |
| 262 public TypeArray getInnerClasses() { return (TypeArray) innerClasses.getValue(this); } | |
| 263 public long getNonstaticFieldSize() { return nonstaticFieldSize.getValue(this); } | |
| 264 public long getStaticFieldSize() { return staticFieldSize.getValue(this); } | |
| 265 public long getStaticOopFieldSize() { return staticOopFieldSize.getValue(this); } | |
| 266 public long getNonstaticOopMapSize() { return nonstaticOopMapSize.getValue(this); } | |
| 267 public boolean getIsMarkedDependent() { return isMarkedDependent.getValue(this) != 0; } | |
| 268 public long getVtableLen() { return vtableLen.getValue(this); } | |
| 269 public long getItableLen() { return itableLen.getValue(this); } | |
| 270 public Symbol getGenericSignature() { return (Symbol) genericSignature.getValue(this); } | |
| 271 public long majorVersion() { return majorVersion.getValue(this); } | |
| 272 public long minorVersion() { return minorVersion.getValue(this); } | |
| 273 | |
| 274 // "size helper" == instance size in words | |
| 275 public long getSizeHelper() { | |
| 276 int lh = getLayoutHelper(); | |
| 277 if (Assert.ASSERTS_ENABLED) { | |
| 278 Assert.that(lh > 0, "layout helper initialized for instance class"); | |
| 279 } | |
| 280 return lh / VM.getVM().getAddressSize(); | |
| 281 } | |
| 282 | |
| 283 // same as enum InnerClassAttributeOffset in VM code. | |
| 284 public static interface InnerClassAttributeOffset { | |
| 285 // from JVM spec. "InnerClasses" attribute | |
| 286 public static final int innerClassInnerClassInfoOffset = 0; | |
| 287 public static final int innerClassOuterClassInfoOffset = 1; | |
| 288 public static final int innerClassInnerNameOffset = 2; | |
| 289 public static final int innerClassAccessFlagsOffset = 3; | |
| 290 public static final int innerClassNextOffset = 4; | |
| 291 }; | |
| 292 | |
| 293 // refer to compute_modifier_flags in VM code. | |
| 294 public long computeModifierFlags() { | |
| 295 long access = getAccessFlags(); | |
| 296 // But check if it happens to be member class. | |
| 297 TypeArray innerClassList = getInnerClasses(); | |
| 298 int length = ( innerClassList == null)? 0 : (int) innerClassList.getLength(); | |
| 299 if (length > 0) { | |
| 300 if (Assert.ASSERTS_ENABLED) { | |
| 301 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0, "just checking"); | |
| 302 } | |
| 303 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
| 304 int ioff = innerClassList.getShortAt(i + | |
| 305 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); | |
| 306 // 'ioff' can be zero. | |
| 307 // refer to JVM spec. section 4.7.5. | |
| 308 if (ioff != 0) { | |
| 309 // only look at classes that are already loaded | |
| 310 // since we are looking for the flags for our self. | |
| 311 Oop classInfo = getConstants().getObjAt(ioff); | |
| 312 Symbol name = null; | |
| 313 if (classInfo instanceof Klass) { | |
| 314 name = ((Klass) classInfo).getName(); | |
| 315 } else if (classInfo instanceof Symbol) { | |
| 316 name = (Symbol) classInfo; | |
| 317 } else { | |
| 318 throw new RuntimeException("should not reach here"); | |
| 319 } | |
| 320 | |
| 321 if (name.equals(getName())) { | |
| 322 // This is really a member class | |
| 323 access = innerClassList.getShortAt(i + | |
| 324 InnerClassAttributeOffset.innerClassAccessFlagsOffset); | |
| 325 break; | |
| 326 } | |
| 327 } | |
| 328 } // for inner classes | |
| 329 } | |
| 330 | |
| 331 // Remember to strip ACC_SUPER bit | |
| 332 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 333 } | |
| 334 | |
| 335 | |
| 336 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 337 // anonymous and local classes are excluded. | |
| 338 public boolean isInnerClassName(Symbol sym) { | |
| 339 return isInInnerClasses(sym, false); | |
| 340 } | |
| 341 | |
| 342 // whether given Symbol is name of an inner/nested Klass of this Klass? | |
| 343 // anonymous classes excluded, but local classes are included. | |
| 344 public boolean isInnerOrLocalClassName(Symbol sym) { | |
| 345 return isInInnerClasses(sym, true); | |
| 346 } | |
| 347 | |
| 348 private boolean isInInnerClasses(Symbol sym, boolean includeLocals) { | |
| 349 TypeArray innerClassList = getInnerClasses(); | |
| 350 int length = ( innerClassList == null)? 0 : (int) innerClassList.getLength(); | |
| 351 if (length > 0) { | |
| 352 if (Assert.ASSERTS_ENABLED) { | |
| 353 Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0, "just checking"); | |
| 354 } | |
| 355 for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) { | |
| 356 int ioff = innerClassList.getShortAt(i + | |
| 357 InnerClassAttributeOffset.innerClassInnerClassInfoOffset); | |
| 358 // 'ioff' can be zero. | |
| 359 // refer to JVM spec. section 4.7.5. | |
| 360 if (ioff != 0) { | |
| 361 Oop iclassInfo = getConstants().getObjAt(ioff); | |
| 362 Symbol innerName = null; | |
| 363 if (iclassInfo instanceof Klass) { | |
| 364 innerName = ((Klass) iclassInfo).getName(); | |
| 365 } else if (iclassInfo instanceof Symbol) { | |
| 366 innerName = (Symbol) iclassInfo; | |
| 367 } else { | |
| 368 throw new RuntimeException("should not reach here"); | |
| 369 } | |
| 370 | |
| 371 Symbol myname = getName(); | |
| 372 int ooff = innerClassList.getShortAt(i + | |
| 373 InnerClassAttributeOffset.innerClassOuterClassInfoOffset); | |
| 374 // for anonymous classes inner_name_index of InnerClasses | |
| 375 // attribute is zero. | |
| 376 int innerNameIndex = innerClassList.getShortAt(i + | |
| 377 InnerClassAttributeOffset.innerClassInnerNameOffset); | |
| 378 // if this is not a member (anonymous, local etc.), 'ooff' will be zero | |
| 379 // refer to JVM spec. section 4.7.5. | |
| 380 if (ooff == 0) { | |
| 381 if (includeLocals) { | |
| 382 // does it looks like my local class? | |
| 383 if (innerName.equals(sym) && | |
| 384 innerName.asString().startsWith(myname.asString())) { | |
| 385 // exclude anonymous classes. | |
| 386 return (innerNameIndex != 0); | |
| 387 } | |
| 388 } | |
| 389 } else { | |
| 390 Oop oclassInfo = getConstants().getObjAt(ooff); | |
| 391 Symbol outerName = null; | |
| 392 if (oclassInfo instanceof Klass) { | |
| 393 outerName = ((Klass) oclassInfo).getName(); | |
| 394 } else if (oclassInfo instanceof Symbol) { | |
| 395 outerName = (Symbol) oclassInfo; | |
| 396 } else { | |
| 397 throw new RuntimeException("should not reach here"); | |
| 398 } | |
| 399 | |
| 400 // include only if current class is outer class. | |
| 401 if (outerName.equals(myname) && innerName.equals(sym)) { | |
| 402 return true; | |
| 403 } | |
| 404 } | |
| 405 } | |
| 406 } // for inner classes | |
| 407 return false; | |
| 408 } else { | |
| 409 return false; | |
| 410 } | |
| 411 } | |
| 412 | |
| 413 public boolean implementsInterface(Klass k) { | |
| 414 if (Assert.ASSERTS_ENABLED) { | |
| 415 Assert.that(k.isInterface(), "should not reach here"); | |
| 416 } | |
| 417 ObjArray interfaces = getTransitiveInterfaces(); | |
| 418 final int len = (int) interfaces.getLength(); | |
| 419 for (int i = 0; i < len; i++) { | |
| 420 if (interfaces.getObjAt(i).equals(k)) return true; | |
| 421 } | |
| 422 return false; | |
| 423 } | |
| 424 | |
| 425 boolean computeSubtypeOf(Klass k) { | |
| 426 if (k.isInterface()) { | |
| 427 return implementsInterface(k); | |
| 428 } else { | |
| 429 return super.computeSubtypeOf(k); | |
| 430 } | |
| 431 } | |
| 432 | |
| 433 public void printValueOn(PrintStream tty) { | |
| 434 tty.print("InstanceKlass for " + getName().asString()); | |
| 435 } | |
| 436 | |
| 437 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 438 super.iterateFields(visitor, doVMFields); | |
| 439 if (doVMFields) { | |
| 440 visitor.doOop(arrayKlasses, true); | |
| 441 visitor.doOop(methods, true); | |
| 442 visitor.doOop(methodOrdering, true); | |
| 443 visitor.doOop(localInterfaces, true); | |
| 444 visitor.doOop(transitiveInterfaces, true); | |
| 445 visitor.doCInt(nofImplementors, true); | |
| 446 for (int i = 0; i < IMPLEMENTORS_LIMIT; i++) | |
| 447 visitor.doOop(implementors[i], true); | |
| 448 visitor.doOop(fields, true); | |
| 449 visitor.doOop(constants, true); | |
| 450 visitor.doOop(classLoader, true); | |
| 451 visitor.doOop(protectionDomain, true); | |
| 452 visitor.doOop(signers, true); | |
| 453 visitor.doOop(sourceFileName, true); | |
| 454 visitor.doOop(innerClasses, true); | |
| 455 visitor.doCInt(nonstaticFieldSize, true); | |
| 456 visitor.doCInt(staticFieldSize, true); | |
| 457 visitor.doCInt(staticOopFieldSize, true); | |
| 458 visitor.doCInt(nonstaticOopMapSize, true); | |
| 459 visitor.doCInt(isMarkedDependent, true); | |
| 460 visitor.doCInt(initState, true); | |
| 461 visitor.doCInt(vtableLen, true); | |
| 462 visitor.doCInt(itableLen, true); | |
| 463 } | |
| 464 | |
| 465 TypeArray fields = getFields(); | |
| 466 int length = (int) fields.getLength(); | |
| 467 for (int index = 0; index < length; index += NEXT_OFFSET) { | |
| 468 short accessFlags = fields.getShortAt(index + ACCESS_FLAGS_OFFSET); | |
| 469 short signatureIndex = fields.getShortAt(index + SIGNATURE_INDEX_OFFSET); | |
| 470 FieldType type = new FieldType((Symbol) getConstants().getObjAt(signatureIndex)); | |
| 471 AccessFlags access = new AccessFlags(accessFlags); | |
| 472 if (access.isStatic()) { | |
| 473 visitField(visitor, type, index); | |
| 474 } | |
| 475 } | |
| 476 } | |
| 477 | |
| 478 public Klass getJavaSuper() { | |
| 479 return getSuper(); | |
| 480 } | |
| 481 | |
| 482 public void iterateNonStaticFields(OopVisitor visitor) { | |
| 483 if (getSuper() != null) { | |
| 484 ((InstanceKlass) getSuper()).iterateNonStaticFields(visitor); | |
| 485 } | |
| 486 TypeArray fields = getFields(); | |
| 487 | |
| 488 int length = (int) fields.getLength(); | |
| 489 for (int index = 0; index < length; index += NEXT_OFFSET) { | |
| 490 short accessFlags = fields.getShortAt(index + ACCESS_FLAGS_OFFSET); | |
| 491 short signatureIndex = fields.getShortAt(index + SIGNATURE_INDEX_OFFSET); | |
| 492 | |
| 493 FieldType type = new FieldType((Symbol) getConstants().getObjAt(signatureIndex)); | |
| 494 AccessFlags access = new AccessFlags(accessFlags); | |
| 495 if (!access.isStatic()) { | |
| 496 visitField(visitor, type, index); | |
| 497 } | |
| 498 } | |
| 499 } | |
| 500 | |
| 501 /** Field access by name. */ | |
| 502 public Field findLocalField(Symbol name, Symbol sig) { | |
| 503 TypeArray fields = getFields(); | |
| 504 int n = (int) fields.getLength(); | |
| 505 ConstantPool cp = getConstants(); | |
| 506 for (int i = 0; i < n; i += NEXT_OFFSET) { | |
| 507 int nameIndex = fields.getShortAt(i + NAME_INDEX_OFFSET); | |
| 508 int sigIndex = fields.getShortAt(i + SIGNATURE_INDEX_OFFSET); | |
| 509 Symbol f_name = cp.getSymbolAt(nameIndex); | |
| 510 Symbol f_sig = cp.getSymbolAt(sigIndex); | |
| 511 if (name.equals(f_name) && sig.equals(f_sig)) { | |
| 512 return newField(i); | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 return null; | |
| 517 } | |
| 518 | |
| 519 /** Find field in direct superinterfaces. */ | |
| 520 public Field findInterfaceField(Symbol name, Symbol sig) { | |
| 521 ObjArray interfaces = getLocalInterfaces(); | |
| 522 int n = (int) interfaces.getLength(); | |
| 523 for (int i = 0; i < n; i++) { | |
| 524 InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i); | |
| 525 if (Assert.ASSERTS_ENABLED) { | |
| 526 Assert.that(intf1.isInterface(), "just checking type"); | |
| 527 } | |
| 528 // search for field in current interface | |
| 529 Field f = intf1.findLocalField(name, sig); | |
| 530 if (f != null) { | |
| 531 if (Assert.ASSERTS_ENABLED) { | |
| 532 Assert.that(f.getAccessFlagsObj().isStatic(), "interface field must be static"); | |
| 533 } | |
| 534 return f; | |
| 535 } | |
| 536 // search for field in direct superinterfaces | |
| 537 f = intf1.findInterfaceField(name, sig); | |
| 538 if (f != null) return f; | |
| 539 } | |
| 540 // otherwise field lookup fails | |
| 541 return null; | |
| 542 } | |
| 543 | |
| 544 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 545 which the field is defined. */ | |
| 546 public Field findField(Symbol name, Symbol sig) { | |
| 547 // search order according to newest JVM spec (5.4.3.2, p.167). | |
| 548 // 1) search for field in current klass | |
| 549 Field f = findLocalField(name, sig); | |
| 550 if (f != null) return f; | |
| 551 | |
| 552 // 2) search for field recursively in direct superinterfaces | |
| 553 f = findInterfaceField(name, sig); | |
| 554 if (f != null) return f; | |
| 555 | |
| 556 // 3) apply field lookup recursively if superclass exists | |
| 557 InstanceKlass supr = (InstanceKlass) getSuper(); | |
| 558 if (supr != null) return supr.findField(name, sig); | |
| 559 | |
| 560 // 4) otherwise field lookup fails | |
| 561 return null; | |
| 562 } | |
| 563 | |
| 564 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 565 which the field is defined (convenience routine) */ | |
| 566 public Field findField(String name, String sig) { | |
| 567 SymbolTable symbols = VM.getVM().getSymbolTable(); | |
| 568 Symbol nameSym = symbols.probe(name); | |
| 569 Symbol sigSym = symbols.probe(sig); | |
| 570 if (nameSym == null || sigSym == null) { | |
| 571 return null; | |
| 572 } | |
| 573 return findField(nameSym, sigSym); | |
| 574 } | |
| 575 | |
| 576 /** Find field according to JVM spec 5.4.3.2, returns the klass in | |
| 577 which the field is defined (retained only for backward | |
| 578 compatibility with jdbx) */ | |
| 579 public Field findFieldDbg(String name, String sig) { | |
| 580 return findField(name, sig); | |
| 581 } | |
| 582 | |
| 583 /** Get field by its index in the fields array. Only designed for | |
| 584 use in a debugging system. */ | |
| 585 public Field getFieldByIndex(int fieldArrayIndex) { | |
| 586 return newField(fieldArrayIndex); | |
| 587 } | |
| 588 | |
| 589 | |
| 590 /** Return a List of SA Fields for the fields declared in this class. | |
| 591 Inherited fields are not included. | |
| 592 Return an empty list if there are no fields declared in this class. | |
| 593 Only designed for use in a debugging system. */ | |
| 594 public List getImmediateFields() { | |
| 595 // A list of Fields for each field declared in this class/interface, | |
| 596 // not including inherited fields. | |
| 597 TypeArray fields = getFields(); | |
| 598 | |
| 599 int length = (int) fields.getLength(); | |
| 600 List immediateFields = new ArrayList(length / NEXT_OFFSET); | |
| 601 for (int index = 0; index < length; index += NEXT_OFFSET) { | |
| 602 immediateFields.add(getFieldByIndex(index)); | |
| 603 } | |
| 604 | |
| 605 return immediateFields; | |
| 606 } | |
| 607 | |
| 608 /** Return a List of SA Fields for all the java fields in this class, | |
| 609 including all inherited fields. This includes hidden | |
| 610 fields. Thus the returned list can contain fields with | |
| 611 the same name. | |
| 612 Return an empty list if there are no fields. | |
| 613 Only designed for use in a debugging system. */ | |
| 614 public List getAllFields() { | |
| 615 // Contains a Field for each field in this class, including immediate | |
| 616 // fields and inherited fields. | |
| 617 List allFields = getImmediateFields(); | |
| 618 | |
| 619 // transitiveInterfaces contains all interfaces implemented | |
| 620 // by this class and its superclass chain with no duplicates. | |
| 621 | |
| 622 ObjArray interfaces = getTransitiveInterfaces(); | |
| 623 int n = (int) interfaces.getLength(); | |
| 624 for (int i = 0; i < n; i++) { | |
| 625 InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i); | |
| 626 if (Assert.ASSERTS_ENABLED) { | |
| 627 Assert.that(intf1.isInterface(), "just checking type"); | |
| 628 } | |
| 629 allFields.addAll(intf1.getImmediateFields()); | |
| 630 } | |
| 631 | |
| 632 // Get all fields in the superclass, recursively. But, don't | |
| 633 // include fields in interfaces implemented by superclasses; | |
| 634 // we already have all those. | |
| 635 if (!isInterface()) { | |
| 636 InstanceKlass supr; | |
| 637 if ( (supr = (InstanceKlass) getSuper()) != null) { | |
| 638 allFields.addAll(supr.getImmediateFields()); | |
| 639 } | |
| 640 } | |
| 641 | |
| 642 return allFields; | |
| 643 } | |
| 644 | |
| 645 | |
| 646 /** Return a List of SA Methods declared directly in this class/interface. | |
| 647 Return an empty list if there are none, or if this isn't a class/ | |
| 648 interface. | |
| 649 */ | |
| 650 public List getImmediateMethods() { | |
| 651 // Contains a Method for each method declared in this class/interface | |
| 652 // not including inherited methods. | |
| 653 | |
| 654 ObjArray methods = getMethods(); | |
| 655 int length = (int)methods.getLength(); | |
| 656 Object[] tmp = new Object[length]; | |
| 657 | |
| 658 TypeArray methodOrdering = getMethodOrdering(); | |
| 659 if (methodOrdering.getLength() != length) { | |
| 660 // no ordering info present | |
| 661 for (int index = 0; index < length; index++) { | |
| 662 tmp[index] = methods.getObjAt(index); | |
| 663 } | |
| 664 } else { | |
| 665 for (int index = 0; index < length; index++) { | |
| 666 int originalIndex = getMethodOrdering().getIntAt(index); | |
| 667 tmp[originalIndex] = methods.getObjAt(index); | |
| 668 } | |
| 669 } | |
| 670 | |
| 671 return Arrays.asList(tmp); | |
| 672 } | |
| 673 | |
| 674 /** Return a List containing an SA InstanceKlass for each | |
| 675 interface named in this class's 'implements' clause. | |
| 676 */ | |
| 677 public List getDirectImplementedInterfaces() { | |
| 678 // Contains an InstanceKlass for each interface in this classes | |
| 679 // 'implements' clause. | |
| 680 | |
| 681 ObjArray interfaces = getLocalInterfaces(); | |
| 682 int length = (int) interfaces.getLength(); | |
| 683 List directImplementedInterfaces = new ArrayList(length); | |
| 684 | |
| 685 for (int index = 0; index < length; index ++) { | |
| 686 directImplementedInterfaces.add(interfaces.getObjAt(index)); | |
| 687 } | |
| 688 | |
| 689 return directImplementedInterfaces; | |
| 690 } | |
| 691 | |
| 692 | |
| 693 public long getObjectSize() { | |
| 694 long bodySize = alignObjectOffset(getVtableLen() * getHeap().getOopSize()) | |
| 695 + alignObjectOffset(getItableLen() * getHeap().getOopSize()) | |
| 696 + (getStaticFieldSize() + getNonstaticOopMapSize()) * getHeap().getOopSize(); | |
| 697 return alignObjectSize(headerSize + bodySize); | |
| 698 } | |
| 699 | |
| 700 public Klass arrayKlassImpl(boolean orNull, int n) { | |
| 701 // FIXME: in reflective system this would need to change to | |
| 702 // actually allocate | |
| 703 if (getArrayKlasses() == null) { return null; } | |
| 704 ObjArrayKlass oak = (ObjArrayKlass) getArrayKlasses(); | |
| 705 if (orNull) { | |
| 706 return oak.arrayKlassOrNull(n); | |
| 707 } | |
| 708 return oak.arrayKlass(n); | |
| 709 } | |
| 710 | |
| 711 public Klass arrayKlassImpl(boolean orNull) { | |
| 712 return arrayKlassImpl(orNull, 1); | |
| 713 } | |
| 714 | |
| 715 public String signature() { | |
| 716 return "L" + super.signature() + ";"; | |
| 717 } | |
| 718 | |
| 719 /** Convenience routine taking Strings; lookup is done in | |
| 720 SymbolTable. */ | |
| 721 public Method findMethod(String name, String sig) { | |
| 722 SymbolTable syms = VM.getVM().getSymbolTable(); | |
| 723 Symbol nameSym = syms.probe(name); | |
| 724 Symbol sigSym = syms.probe(sig); | |
| 725 if (nameSym == null || sigSym == null) { | |
| 726 return null; | |
| 727 } | |
| 728 return findMethod(nameSym, sigSym); | |
| 729 } | |
| 730 | |
| 731 /** Find method in vtable. */ | |
| 732 public Method findMethod(Symbol name, Symbol sig) { | |
| 733 return findMethod(getMethods(), name, sig); | |
| 734 } | |
| 735 | |
| 736 /** Breakpoint support (see methods on methodOop for details) */ | |
| 737 public BreakpointInfo getBreakpoints() { | |
| 738 Address addr = getHandle().getAddressAt(Oop.getHeaderSize() + breakpoints.getOffset()); | |
| 739 return (BreakpointInfo) VMObjectFactory.newObject(BreakpointInfo.class, addr); | |
| 740 } | |
| 741 | |
| 742 //---------------------------------------------------------------------- | |
| 743 // Internals only below this point | |
| 744 // | |
| 745 | |
| 746 private void visitField(OopVisitor visitor, FieldType type, int index) { | |
| 747 Field f = newField(index); | |
| 748 if (type.isOop()) { | |
| 749 visitor.doOop((OopField) f, false); | |
| 750 return; | |
| 751 } | |
| 752 if (type.isByte()) { | |
| 753 visitor.doByte((ByteField) f, false); | |
| 754 return; | |
| 755 } | |
| 756 if (type.isChar()) { | |
| 757 visitor.doChar((CharField) f, false); | |
| 758 return; | |
| 759 } | |
| 760 if (type.isDouble()) { | |
| 761 visitor.doDouble((DoubleField) f, false); | |
| 762 return; | |
| 763 } | |
| 764 if (type.isFloat()) { | |
| 765 visitor.doFloat((FloatField) f, false); | |
| 766 return; | |
| 767 } | |
| 768 if (type.isInt()) { | |
| 769 visitor.doInt((IntField) f, false); | |
| 770 return; | |
| 771 } | |
| 772 if (type.isLong()) { | |
| 773 visitor.doLong((LongField) f, false); | |
| 774 return; | |
| 775 } | |
| 776 if (type.isShort()) { | |
| 777 visitor.doShort((ShortField) f, false); | |
| 778 return; | |
| 779 } | |
| 780 if (type.isBoolean()) { | |
| 781 visitor.doBoolean((BooleanField) f, false); | |
| 782 return; | |
| 783 } | |
| 784 } | |
| 785 | |
| 786 // Creates new field from index in fields TypeArray | |
| 787 private Field newField(int index) { | |
| 788 TypeArray fields = getFields(); | |
| 789 short signatureIndex = fields.getShortAt(index + SIGNATURE_INDEX_OFFSET); | |
| 790 FieldType type = new FieldType((Symbol) getConstants().getObjAt(signatureIndex)); | |
| 791 if (type.isOop()) { | |
|
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792 if (VM.getVM().isCompressedOopsEnabled()) { |
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793 return new NarrowOopField(this, index); |
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794 } else { |
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795 return new OopField(this, index); |
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796 } |
| 0 | 797 } |
| 798 if (type.isByte()) { | |
| 799 return new ByteField(this, index); | |
| 800 } | |
| 801 if (type.isChar()) { | |
| 802 return new CharField(this, index); | |
| 803 } | |
| 804 if (type.isDouble()) { | |
| 805 return new DoubleField(this, index); | |
| 806 } | |
| 807 if (type.isFloat()) { | |
| 808 return new FloatField(this, index); | |
| 809 } | |
| 810 if (type.isInt()) { | |
| 811 return new IntField(this, index); | |
| 812 } | |
| 813 if (type.isLong()) { | |
| 814 return new LongField(this, index); | |
| 815 } | |
| 816 if (type.isShort()) { | |
| 817 return new ShortField(this, index); | |
| 818 } | |
| 819 if (type.isBoolean()) { | |
| 820 return new BooleanField(this, index); | |
| 821 } | |
| 822 throw new RuntimeException("Illegal field type at index " + index); | |
| 823 } | |
| 824 | |
| 825 private static Method findMethod(ObjArray methods, Symbol name, Symbol signature) { | |
| 826 int len = (int) methods.getLength(); | |
| 827 // methods are sorted, so do binary search | |
| 828 int l = 0; | |
| 829 int h = len - 1; | |
| 830 while (l <= h) { | |
| 831 int mid = (l + h) >> 1; | |
| 832 Method m = (Method) methods.getObjAt(mid); | |
| 833 int res = m.getName().fastCompare(name); | |
| 834 if (res == 0) { | |
| 835 // found matching name; do linear search to find matching signature | |
| 836 // first, quick check for common case | |
| 837 if (m.getSignature().equals(signature)) return m; | |
| 838 // search downwards through overloaded methods | |
| 839 int i; | |
| 840 for (i = mid - 1; i >= l; i--) { | |
| 841 Method m1 = (Method) methods.getObjAt(i); | |
| 842 if (!m1.getName().equals(name)) break; | |
| 843 if (m1.getSignature().equals(signature)) return m1; | |
| 844 } | |
| 845 // search upwards | |
| 846 for (i = mid + 1; i <= h; i++) { | |
| 847 Method m1 = (Method) methods.getObjAt(i); | |
| 848 if (!m1.getName().equals(name)) break; | |
| 849 if (m1.getSignature().equals(signature)) return m1; | |
| 850 } | |
| 851 // not found | |
| 852 if (Assert.ASSERTS_ENABLED) { | |
| 853 int index = linearSearch(methods, name, signature); | |
| 854 if (index != -1) { | |
| 855 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 856 } | |
| 857 } | |
| 858 return null; | |
| 859 } else if (res < 0) { | |
| 860 l = mid + 1; | |
| 861 } else { | |
| 862 h = mid - 1; | |
| 863 } | |
| 864 } | |
| 865 if (Assert.ASSERTS_ENABLED) { | |
| 866 int index = linearSearch(methods, name, signature); | |
| 867 if (index != -1) { | |
| 868 throw new DebuggerException("binary search bug: should have found entry " + index); | |
| 869 } | |
| 870 } | |
| 871 return null; | |
| 872 } | |
| 873 | |
| 874 private static int linearSearch(ObjArray methods, Symbol name, Symbol signature) { | |
| 875 int len = (int) methods.getLength(); | |
| 876 for (int index = 0; index < len; index++) { | |
| 877 Method m = (Method) methods.getObjAt(index); | |
| 878 if (m.getSignature().equals(signature) && m.getName().equals(name)) { | |
| 879 return index; | |
| 880 } | |
| 881 } | |
| 882 return -1; | |
| 883 } | |
| 884 } |