1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP 26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "memory/referenceType.hpp" 30 #include "oops/annotations.hpp" 31 #include "oops/constMethod.hpp" 32 #include "oops/fieldInfo.hpp" 33 #include "oops/instanceOop.hpp" 34 #include "oops/klassVtable.hpp" 35 #include "runtime/handles.hpp" 36 #include "runtime/os.hpp" 37 #include "utilities/accessFlags.hpp" 38 #include "utilities/bitMap.inline.hpp" 39 #include "utilities/macros.hpp" 40 #include "trace/traceMacros.hpp" 41 42 // An InstanceKlass is the VM level representation of a Java class. 43 // It contains all information needed for at class at execution runtime. 44 45 // InstanceKlass embedded field layout (after declared fields): 46 // [EMBEDDED Java vtable ] size in words = vtable_len 47 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size 48 // The embedded nonstatic oop-map blocks are short pairs (offset, length) 49 // indicating where oops are located in instances of this klass. 50 // [EMBEDDED implementor of the interface] only exist for interface 51 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) 52 53 54 // forward declaration for class -- see below for definition 55 class SuperTypeClosure; 56 class JNIid; 57 class jniIdMapBase; 58 class BreakpointInfo; 59 class fieldDescriptor; 60 class DepChange; 61 class nmethodBucket; 62 class JvmtiCachedClassFieldMap; 63 class MemberNameTable; 64 65 // This is used in iterators below. 66 class FieldClosure: public StackObj { 67 public: 68 virtual void do_field(fieldDescriptor* fd) = 0; 69 }; 70 71 #ifndef PRODUCT 72 // Print fields. 73 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. 74 class FieldPrinter: public FieldClosure { 75 oop _obj; 76 outputStream* _st; 77 public: 78 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} 79 void do_field(fieldDescriptor* fd); 80 }; 81 #endif // !PRODUCT 82 83 // ValueObjs embedded in klass. Describes where oops are located in instances of 84 // this klass. 85 class OopMapBlock VALUE_OBJ_CLASS_SPEC { 86 public: 87 // Byte offset of the first oop mapped by this block. 88 int offset() const { return _offset; } 89 void set_offset(int offset) { _offset = offset; } 90 91 // Number of oops in this block. 92 uint count() const { return _count; } 93 void set_count(uint count) { _count = count; } 94 95 // sizeof(OopMapBlock) in HeapWords. 96 static const int size_in_words() { 97 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> 98 LogHeapWordSize; 99 } 100 101 private: 102 int _offset; 103 uint _count; 104 }; 105 106 struct JvmtiCachedClassFileData; 107 108 class InstanceKlass: public Klass { 109 friend class VMStructs; 110 friend class ClassFileParser; 111 friend class CompileReplay; 112 113 protected: 114 // Constructor 115 InstanceKlass(int vtable_len, 116 int itable_len, 117 int static_field_size, 118 int nonstatic_oop_map_size, 119 ReferenceType rt, 120 AccessFlags access_flags, 121 bool is_anonymous); 122 public: 123 static InstanceKlass* allocate_instance_klass( 124 ClassLoaderData* loader_data, 125 int vtable_len, 126 int itable_len, 127 int static_field_size, 128 int nonstatic_oop_map_size, 129 ReferenceType rt, 130 AccessFlags access_flags, 131 Symbol* name, 132 Klass* super_klass, 133 bool is_anonymous, 134 TRAPS); 135 136 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } 137 138 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description 139 // of the class loading & initialization procedure, and the use of the states. 140 enum ClassState { 141 allocated, // allocated (but not yet linked) 142 loaded, // loaded and inserted in class hierarchy (but not linked yet) 143 linked, // successfully linked/verified (but not initialized yet) 144 being_initialized, // currently running class initializer 145 fully_initialized, // initialized (successfull final state) 146 initialization_error // error happened during initialization 147 }; 148 149 static int number_of_instance_classes() { return _total_instanceKlass_count; } 150 151 private: 152 static volatile int _total_instanceKlass_count; 153 154 protected: 155 // Annotations for this class 156 Annotations* _annotations; 157 // Array classes holding elements of this class. 158 Klass* _array_klasses; 159 // Constant pool for this class. 160 ConstantPool* _constants; 161 // The InnerClasses attribute and EnclosingMethod attribute. The 162 // _inner_classes is an array of shorts. If the class has InnerClasses 163 // attribute, then the _inner_classes array begins with 4-tuples of shorts 164 // [inner_class_info_index, outer_class_info_index, 165 // inner_name_index, inner_class_access_flags] for the InnerClasses 166 // attribute. If the EnclosingMethod attribute exists, it occupies the 167 // last two shorts [class_index, method_index] of the array. If only 168 // the InnerClasses attribute exists, the _inner_classes array length is 169 // number_of_inner_classes * 4. If the class has both InnerClasses 170 // and EnclosingMethod attributes the _inner_classes array length is 171 // number_of_inner_classes * 4 + enclosing_method_attribute_size. 172 Array<jushort>* _inner_classes; 173 174 // the source debug extension for this klass, NULL if not specified. 175 // Specified as UTF-8 string without terminating zero byte in the classfile, 176 // it is stored in the instanceklass as a NULL-terminated UTF-8 string 177 char* _source_debug_extension; 178 // Array name derived from this class which needs unreferencing 179 // if this class is unloaded. 180 Symbol* _array_name; 181 182 // Number of heapOopSize words used by non-static fields in this klass 183 // (including inherited fields but after header_size()). 184 int _nonstatic_field_size; 185 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass 186 // Constant pool index to the utf8 entry of the Generic signature, 187 // or 0 if none. 188 u2 _generic_signature_index; 189 // Constant pool index to the utf8 entry for the name of source file 190 // containing this klass, 0 if not specified. 191 u2 _source_file_name_index; 192 u2 _static_oop_field_count;// number of static oop fields in this klass 193 u2 _java_fields_count; // The number of declared Java fields 194 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks 195 196 // _is_marked_dependent can be set concurrently, thus cannot be part of the 197 // _misc_flags. 198 bool _is_marked_dependent; // used for marking during flushing and deoptimization 199 bool _has_unloaded_dependent; 200 201 enum { 202 _misc_rewritten = 1 << 0, // methods rewritten. 203 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops 204 _misc_should_verify_class = 1 << 2, // allow caching of preverification 205 _misc_is_anonymous = 1 << 3, // has embedded _host_klass field 206 _misc_is_contended = 1 << 4, // marked with contended annotation 207 _misc_has_default_methods = 1 << 5, // class/superclass/implemented interfaces has default methods 208 _misc_has_been_redefined = 1 << 6 // class has been redefined 209 }; 210 u2 _misc_flags; 211 u2 _minor_version; // minor version number of class file 212 u2 _major_version; // major version number of class file 213 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) 214 int _vtable_len; // length of Java vtable (in words) 215 int _itable_len; // length of Java itable (in words) 216 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) 217 JNIid* _jni_ids; // First JNI identifier for static fields in this class 218 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none 219 nmethodBucket* _dependencies; // list of dependent nmethods 220 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class 221 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* 222 // Linked instanceKlasses of previous versions 223 InstanceKlass* _previous_versions; 224 // JVMTI fields can be moved to their own structure - see 6315920 225 // JVMTI: cached class file, before retransformable agent modified it in CFLH 226 JvmtiCachedClassFileData* _cached_class_file; 227 228 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change 229 230 // Class states are defined as ClassState (see above). 231 // Place the _init_state here to utilize the unused 2-byte after 232 // _idnum_allocated_count. 233 u1 _init_state; // state of class 234 u1 _reference_type; // reference type 235 236 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration 237 238 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies 239 240 // Method array. 241 Array<Method*>* _methods; 242 // Default Method Array, concrete methods inherited from interfaces 243 Array<Method*>* _default_methods; 244 // Interface (Klass*s) this class declares locally to implement. 245 Array<Klass*>* _local_interfaces; 246 // Interface (Klass*s) this class implements transitively. 247 Array<Klass*>* _transitive_interfaces; 248 // Int array containing the original order of method in the class file (for JVMTI). 249 Array<int>* _method_ordering; 250 // Int array containing the vtable_indices for default_methods 251 // offset matches _default_methods offset 252 Array<int>* _default_vtable_indices; 253 254 // Instance and static variable information, starts with 6-tuples of shorts 255 // [access, name index, sig index, initval index, low_offset, high_offset] 256 // for all fields, followed by the generic signature data at the end of 257 // the array. Only fields with generic signature attributes have the generic 258 // signature data set in the array. The fields array looks like following: 259 // 260 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] 261 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] 262 // ... 263 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] 264 // [generic signature index] 265 // [generic signature index] 266 // ... 267 Array<u2>* _fields; 268 269 // embedded Java vtable follows here 270 // embedded Java itables follows here 271 // embedded static fields follows here 272 // embedded nonstatic oop-map blocks follows here 273 // embedded implementor of this interface follows here 274 // The embedded implementor only exists if the current klass is an 275 // iterface. The possible values of the implementor fall into following 276 // three cases: 277 // NULL: no implementor. 278 // A Klass* that's not itself: one implementor. 279 // Itself: more than one implementors. 280 // embedded host klass follows here 281 // The embedded host klass only exists in an anonymous class for 282 // dynamic language support (JSR 292 enabled). The host class grants 283 // its access privileges to this class also. The host class is either 284 // named, or a previously loaded anonymous class. A non-anonymous class 285 // or an anonymous class loaded through normal classloading does not 286 // have this embedded field. 287 // 288 289 friend class SystemDictionary; 290 291 public: 292 bool has_nonstatic_fields() const { 293 return (_misc_flags & _misc_has_nonstatic_fields) != 0; 294 } 295 void set_has_nonstatic_fields(bool b) { 296 if (b) { 297 _misc_flags |= _misc_has_nonstatic_fields; 298 } else { 299 _misc_flags &= ~_misc_has_nonstatic_fields; 300 } 301 } 302 303 // field sizes 304 int nonstatic_field_size() const { return _nonstatic_field_size; } 305 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } 306 307 int static_field_size() const { return _static_field_size; } 308 void set_static_field_size(int size) { _static_field_size = size; } 309 310 int static_oop_field_count() const { return (int)_static_oop_field_count; } 311 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } 312 313 // Java vtable 314 int vtable_length() const { return _vtable_len; } 315 void set_vtable_length(int len) { _vtable_len = len; } 316 317 // Java itable 318 int itable_length() const { return _itable_len; } 319 void set_itable_length(int len) { _itable_len = len; } 320 321 // array klasses 322 Klass* array_klasses() const { return _array_klasses; } 323 void set_array_klasses(Klass* k) { _array_klasses = k; } 324 325 // methods 326 Array<Method*>* methods() const { return _methods; } 327 void set_methods(Array<Method*>* a) { _methods = a; } 328 Method* method_with_idnum(int idnum); 329 330 // method ordering 331 Array<int>* method_ordering() const { return _method_ordering; } 332 void set_method_ordering(Array<int>* m) { _method_ordering = m; } 333 void copy_method_ordering(intArray* m, TRAPS); 334 335 // default_methods 336 Array<Method*>* default_methods() const { return _default_methods; } 337 void set_default_methods(Array<Method*>* a) { _default_methods = a; } 338 339 // default method vtable_indices 340 Array<int>* default_vtable_indices() const { return _default_vtable_indices; } 341 void set_default_vtable_indices(Array<int>* v) { _default_vtable_indices = v; } 342 Array<int>* create_new_default_vtable_indices(int len, TRAPS); 343 344 // interfaces 345 Array<Klass*>* local_interfaces() const { return _local_interfaces; } 346 void set_local_interfaces(Array<Klass*>* a) { 347 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); 348 _local_interfaces = a; } 349 350 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } 351 void set_transitive_interfaces(Array<Klass*>* a) { 352 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); 353 _transitive_interfaces = a; 354 } 355 356 private: 357 friend class fieldDescriptor; 358 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } 359 360 public: 361 int field_offset (int index) const { return field(index)->offset(); } 362 int field_access_flags(int index) const { return field(index)->access_flags(); } 363 Symbol* field_name (int index) const { return field(index)->name(constants()); } 364 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } 365 366 // Number of Java declared fields 367 int java_fields_count() const { return (int)_java_fields_count; } 368 369 Array<u2>* fields() const { return _fields; } 370 void set_fields(Array<u2>* f, u2 java_fields_count) { 371 guarantee(_fields == NULL || f == NULL, "Just checking"); 372 _fields = f; 373 _java_fields_count = java_fields_count; 374 } 375 376 // inner classes 377 Array<u2>* inner_classes() const { return _inner_classes; } 378 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } 379 380 enum InnerClassAttributeOffset { 381 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 382 inner_class_inner_class_info_offset = 0, 383 inner_class_outer_class_info_offset = 1, 384 inner_class_inner_name_offset = 2, 385 inner_class_access_flags_offset = 3, 386 inner_class_next_offset = 4 387 }; 388 389 enum EnclosingMethodAttributeOffset { 390 enclosing_method_class_index_offset = 0, 391 enclosing_method_method_index_offset = 1, 392 enclosing_method_attribute_size = 2 393 }; 394 395 // method override check 396 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); 397 398 // package 399 bool is_same_class_package(Klass* class2); 400 bool is_same_class_package(oop classloader2, Symbol* classname2); 401 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); 402 403 // find an enclosing class (defined where original code was, in jvm.cpp!) 404 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { 405 instanceKlassHandle self(THREAD, this); 406 return compute_enclosing_class_impl(self, inner_is_member, THREAD); 407 } 408 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, 409 bool* inner_is_member, TRAPS); 410 411 // tell if two classes have the same enclosing class (at package level) 412 bool is_same_package_member(Klass* class2, TRAPS) { 413 instanceKlassHandle self(THREAD, this); 414 return is_same_package_member_impl(self, class2, THREAD); 415 } 416 static bool is_same_package_member_impl(instanceKlassHandle self, 417 Klass* class2, TRAPS); 418 419 // initialization state 420 bool is_loaded() const { return _init_state >= loaded; } 421 bool is_linked() const { return _init_state >= linked; } 422 bool is_initialized() const { return _init_state == fully_initialized; } 423 bool is_not_initialized() const { return _init_state < being_initialized; } 424 bool is_being_initialized() const { return _init_state == being_initialized; } 425 bool is_in_error_state() const { return _init_state == initialization_error; } 426 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } 427 ClassState init_state() { return (ClassState)_init_state; } 428 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } 429 430 // defineClass specified verification 431 bool should_verify_class() const { 432 return (_misc_flags & _misc_should_verify_class) != 0; 433 } 434 void set_should_verify_class(bool value) { 435 if (value) { 436 _misc_flags |= _misc_should_verify_class; 437 } else { 438 _misc_flags &= ~_misc_should_verify_class; 439 } 440 } 441 442 // marking 443 bool is_marked_dependent() const { return _is_marked_dependent; } 444 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } 445 446 bool has_unloaded_dependent() const { return _has_unloaded_dependent; } 447 void set_has_unloaded_dependent(bool value) { _has_unloaded_dependent = value; } 448 449 // initialization (virtuals from Klass) 450 bool should_be_initialized() const; // means that initialize should be called 451 void initialize(TRAPS); 452 void link_class(TRAPS); 453 bool link_class_or_fail(TRAPS); // returns false on failure 454 void unlink_class(); 455 void rewrite_class(TRAPS); 456 void link_methods(TRAPS); 457 Method* class_initializer(); 458 459 // set the class to initialized if no static initializer is present 460 void eager_initialize(Thread *thread); 461 462 // reference type 463 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } 464 void set_reference_type(ReferenceType t) { 465 assert(t == (u1)t, "overflow"); 466 _reference_type = (u1)t; 467 } 468 469 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } 470 471 // find local field, returns true if found 472 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; 473 // find field in direct superinterfaces, returns the interface in which the field is defined 474 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; 475 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined 476 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; 477 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined 478 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; 479 480 // find a non-static or static field given its offset within the class. 481 bool contains_field_offset(int offset) { 482 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); 483 } 484 485 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; 486 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; 487 488 // find a local method (returns NULL if not found) 489 Method* find_method(Symbol* name, Symbol* signature) const; 490 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); 491 static Method* find_instance_method(Array<Method*>* methods, Symbol* name, Symbol* signature); 492 493 // find a local method index in default_methods (returns -1 if not found) 494 static int find_method_index(Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass); 495 496 // lookup operation (returns NULL if not found) 497 Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const; 498 499 // lookup a method in all the interfaces that this class implements 500 // (returns NULL if not found) 501 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, MethodLookupMode mode) const; 502 503 // lookup a method in local defaults then in all interfaces 504 // (returns NULL if not found) 505 Method* lookup_method_in_ordered_interfaces(Symbol* name, Symbol* signature) const; 506 507 // Find method indices by name. If a method with the specified name is 508 // found the index to the first method is returned, and 'end' is filled in 509 // with the index of first non-name-matching method. If no method is found 510 // -1 is returned. 511 int find_method_by_name(Symbol* name, int* end); 512 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); 513 514 // constant pool 515 ConstantPool* constants() const { return _constants; } 516 void set_constants(ConstantPool* c) { _constants = c; } 517 518 // protection domain 519 oop protection_domain() const; 520 521 // signers 522 objArrayOop signers() const; 523 524 // host class 525 Klass* host_klass() const { 526 Klass** hk = (Klass**)adr_host_klass(); 527 if (hk == NULL) { 528 return NULL; 529 } else { 530 assert(*hk != NULL, "host klass should always be set if the address is not null"); 531 return *hk; 532 } 533 } 534 void set_host_klass(Klass* host) { 535 assert(is_anonymous(), "not anonymous"); 536 Klass** addr = (Klass**)adr_host_klass(); 537 assert(addr != NULL, "no reversed space"); 538 if (addr != NULL) { 539 *addr = host; 540 } 541 } 542 bool is_anonymous() const { 543 return (_misc_flags & _misc_is_anonymous) != 0; 544 } 545 void set_is_anonymous(bool value) { 546 if (value) { 547 _misc_flags |= _misc_is_anonymous; 548 } else { 549 _misc_flags &= ~_misc_is_anonymous; 550 } 551 } 552 553 // Oop that keeps the metadata for this class from being unloaded 554 // in places where the metadata is stored in other places, like nmethods 555 oop klass_holder() const { 556 return is_anonymous() ? java_mirror() : class_loader(); 557 } 558 559 bool is_contended() const { 560 return (_misc_flags & _misc_is_contended) != 0; 561 } 562 void set_is_contended(bool value) { 563 if (value) { 564 _misc_flags |= _misc_is_contended; 565 } else { 566 _misc_flags &= ~_misc_is_contended; 567 } 568 } 569 570 // source file name 571 Symbol* source_file_name() const { 572 return (_source_file_name_index == 0) ? 573 (Symbol*)NULL : _constants->symbol_at(_source_file_name_index); 574 } 575 u2 source_file_name_index() const { 576 return _source_file_name_index; 577 } 578 void set_source_file_name_index(u2 sourcefile_index) { 579 _source_file_name_index = sourcefile_index; 580 } 581 582 // minor and major version numbers of class file 583 u2 minor_version() const { return _minor_version; } 584 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } 585 u2 major_version() const { return _major_version; } 586 void set_major_version(u2 major_version) { _major_version = major_version; } 587 588 // source debug extension 589 char* source_debug_extension() const { return _source_debug_extension; } 590 void set_source_debug_extension(char* array, int length); 591 592 // symbol unloading support (refcount already added) 593 Symbol* array_name() { return _array_name; } 594 void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } 595 596 // nonstatic oop-map blocks 597 static int nonstatic_oop_map_size(unsigned int oop_map_count) { 598 return oop_map_count * OopMapBlock::size_in_words(); 599 } 600 unsigned int nonstatic_oop_map_count() const { 601 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); 602 } 603 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } 604 void set_nonstatic_oop_map_size(int words) { 605 _nonstatic_oop_map_size = words; 606 } 607 608 // RedefineClasses() support for previous versions: 609 void add_previous_version(instanceKlassHandle ikh, int emcp_method_count); 610 611 InstanceKlass* previous_versions() const { return _previous_versions; } 612 613 bool has_been_redefined() const { 614 return (_misc_flags & _misc_has_been_redefined) != 0; 615 } 616 void set_has_been_redefined() { 617 _misc_flags |= _misc_has_been_redefined; 618 } 619 620 void init_previous_versions() { 621 _previous_versions = NULL; 622 } 623 624 static void purge_previous_versions(InstanceKlass* ik); 625 626 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation 627 void set_cached_class_file(JvmtiCachedClassFileData *data) { 628 _cached_class_file = data; 629 } 630 JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; } 631 jint get_cached_class_file_len(); 632 unsigned char * get_cached_class_file_bytes(); 633 634 // JVMTI: Support for caching of field indices, types, and offsets 635 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { 636 _jvmti_cached_class_field_map = descriptor; 637 } 638 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { 639 return _jvmti_cached_class_field_map; 640 } 641 642 bool has_default_methods() const { 643 return (_misc_flags & _misc_has_default_methods) != 0; 644 } 645 void set_has_default_methods(bool b) { 646 if (b) { 647 _misc_flags |= _misc_has_default_methods; 648 } else { 649 _misc_flags &= ~_misc_has_default_methods; 650 } 651 } 652 653 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available 654 inline u2 next_method_idnum(); 655 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } 656 657 // generics support 658 Symbol* generic_signature() const { 659 return (_generic_signature_index == 0) ? 660 (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); 661 } 662 u2 generic_signature_index() const { 663 return _generic_signature_index; 664 } 665 void set_generic_signature_index(u2 sig_index) { 666 _generic_signature_index = sig_index; 667 } 668 669 u2 enclosing_method_data(int offset); 670 u2 enclosing_method_class_index() { 671 return enclosing_method_data(enclosing_method_class_index_offset); 672 } 673 u2 enclosing_method_method_index() { 674 return enclosing_method_data(enclosing_method_method_index_offset); 675 } 676 void set_enclosing_method_indices(u2 class_index, 677 u2 method_index); 678 679 // jmethodID support 680 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, 681 methodHandle method_h); 682 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, 683 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, 684 jmethodID* to_dealloc_id_p, 685 jmethodID** to_dealloc_jmeths_p); 686 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, 687 size_t *length_p, jmethodID* id_p); 688 jmethodID jmethod_id_or_null(Method* method); 689 690 // annotations support 691 Annotations* annotations() const { return _annotations; } 692 void set_annotations(Annotations* anno) { _annotations = anno; } 693 694 AnnotationArray* class_annotations() const { 695 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; 696 } 697 Array<AnnotationArray*>* fields_annotations() const { 698 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; 699 } 700 AnnotationArray* class_type_annotations() const { 701 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; 702 } 703 Array<AnnotationArray*>* fields_type_annotations() const { 704 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; 705 } 706 // allocation 707 instanceOop allocate_instance(TRAPS); 708 709 // additional member function to return a handle 710 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } 711 712 objArrayOop allocate_objArray(int n, int length, TRAPS); 713 // Helper function 714 static instanceOop register_finalizer(instanceOop i, TRAPS); 715 716 // Check whether reflection/jni/jvm code is allowed to instantiate this class; 717 // if not, throw either an Error or an Exception. 718 virtual void check_valid_for_instantiation(bool throwError, TRAPS); 719 720 // initialization 721 void call_class_initializer(TRAPS); 722 void set_initialization_state_and_notify(ClassState state, TRAPS); 723 724 // OopMapCache support 725 OopMapCache* oop_map_cache() { return _oop_map_cache; } 726 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } 727 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); 728 729 // JNI identifier support (for static fields - for jni performance) 730 JNIid* jni_ids() { return _jni_ids; } 731 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } 732 JNIid* jni_id_for(int offset); 733 734 // maintenance of deoptimization dependencies 735 int mark_dependent_nmethods(DepChange& changes); 736 void add_dependent_nmethod(nmethod* nm); 737 void remove_dependent_nmethod(nmethod* nm); 738 739 // On-stack replacement support 740 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; 741 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; 742 void add_osr_nmethod(nmethod* n); 743 void remove_osr_nmethod(nmethod* n); 744 nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; 745 746 // Breakpoint support (see methods on Method* for details) 747 BreakpointInfo* breakpoints() const { return _breakpoints; }; 748 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; 749 750 // support for stub routines 751 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } 752 TRACE_DEFINE_OFFSET; 753 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } 754 755 // subclass/subinterface checks 756 bool implements_interface(Klass* k) const; 757 bool is_same_or_direct_interface(Klass* k) const; 758 759 #ifdef ASSERT 760 // check whether this class or one of its superclasses was redefined 761 bool has_redefined_this_or_super() const; 762 #endif 763 764 // Access to the implementor of an interface. 765 Klass* implementor() const 766 { 767 Klass** k = adr_implementor(); 768 if (k == NULL) { 769 return NULL; 770 } else { 771 return *k; 772 } 773 } 774 775 void set_implementor(Klass* k) { 776 assert(is_interface(), "not interface"); 777 Klass** addr = adr_implementor(); 778 assert(addr != NULL, "null addr"); 779 if (addr != NULL) { 780 *addr = k; 781 } 782 } 783 784 int nof_implementors() const { 785 Klass* k = implementor(); 786 if (k == NULL) { 787 return 0; 788 } else if (k != this) { 789 return 1; 790 } else { 791 return 2; 792 } 793 } 794 795 void add_implementor(Klass* k); // k is a new class that implements this interface 796 void init_implementor(); // initialize 797 798 // link this class into the implementors list of every interface it implements 799 void process_interfaces(Thread *thread); 800 801 // virtual operations from Klass 802 bool is_leaf_class() const { return _subklass == NULL; } 803 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); 804 bool compute_is_subtype_of(Klass* k); 805 bool can_be_primary_super_slow() const; 806 int oop_size(oop obj) const { return size_helper(); } 807 bool oop_is_instance_slow() const { return true; } 808 809 // Iterators 810 void do_local_static_fields(FieldClosure* cl); 811 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields 812 void do_local_static_fields(void f(fieldDescriptor*, Handle, TRAPS), Handle, TRAPS); 813 814 void methods_do(void f(Method* method)); 815 void array_klasses_do(void f(Klass* k)); 816 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); 817 bool super_types_do(SuperTypeClosure* blk); 818 819 // Casting from Klass* 820 static InstanceKlass* cast(Klass* k) { 821 assert(k == NULL || k->is_klass(), "must be"); 822 assert(k == NULL || k->oop_is_instance(), "cast to InstanceKlass"); 823 return (InstanceKlass*) k; 824 } 825 826 InstanceKlass* java_super() const { 827 return (super() == NULL) ? NULL : cast(super()); 828 } 829 830 // Sizing (in words) 831 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } 832 833 static int size(int vtable_length, int itable_length, 834 int nonstatic_oop_map_size, 835 bool is_interface, bool is_anonymous) { 836 return align_object_size(header_size() + 837 align_object_offset(vtable_length) + 838 align_object_offset(itable_length) + 839 ((is_interface || is_anonymous) ? 840 align_object_offset(nonstatic_oop_map_size) : 841 nonstatic_oop_map_size) + 842 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + 843 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); 844 } 845 int size() const { return size(vtable_length(), 846 itable_length(), 847 nonstatic_oop_map_size(), 848 is_interface(), 849 is_anonymous()); 850 } 851 #if INCLUDE_SERVICES 852 virtual void collect_statistics(KlassSizeStats *sz) const; 853 #endif 854 855 static int vtable_start_offset() { return header_size(); } 856 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } 857 858 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } 859 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } 860 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } 861 862 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } 863 864 address static_field_addr(int offset); 865 866 OopMapBlock* start_of_nonstatic_oop_maps() const { 867 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); 868 } 869 870 Klass** end_of_nonstatic_oop_maps() const { 871 return (Klass**)(start_of_nonstatic_oop_maps() + 872 nonstatic_oop_map_count()); 873 } 874 875 Klass** adr_implementor() const { 876 if (is_interface()) { 877 return (Klass**)end_of_nonstatic_oop_maps(); 878 } else { 879 return NULL; 880 } 881 }; 882 883 Klass** adr_host_klass() const { 884 if (is_anonymous()) { 885 Klass** adr_impl = adr_implementor(); 886 if (adr_impl != NULL) { 887 return adr_impl + 1; 888 } else { 889 return end_of_nonstatic_oop_maps(); 890 } 891 } else { 892 return NULL; 893 } 894 } 895 896 // Use this to return the size of an instance in heap words: 897 int size_helper() const { 898 return layout_helper_to_size_helper(layout_helper()); 899 } 900 901 // This bit is initialized in classFileParser.cpp. 902 // It is false under any of the following conditions: 903 // - the class is abstract (including any interface) 904 // - the class has a finalizer (if !RegisterFinalizersAtInit) 905 // - the class size is larger than FastAllocateSizeLimit 906 // - the class is java/lang/Class, which cannot be allocated directly 907 bool can_be_fastpath_allocated() const { 908 return !layout_helper_needs_slow_path(layout_helper()); 909 } 910 911 // Java vtable/itable 912 klassVtable* vtable() const; // return new klassVtable wrapper 913 inline Method* method_at_vtable(int index); 914 klassItable* itable() const; // return new klassItable wrapper 915 Method* method_at_itable(Klass* holder, int index, TRAPS); 916 917 #if INCLUDE_JVMTI 918 void adjust_default_methods(Method** old_methods, Method** new_methods, 919 int methods_length, bool* trace_name_printed); 920 void adjust_member_name_table(Method** old_methods, Method** new_methods, 921 int methods_length, bool* trace_name_printed); 922 #endif // INCLUDE_JVMTI 923 924 // Garbage collection 925 void oop_follow_contents(oop obj); 926 int oop_adjust_pointers(oop obj); 927 928 void clean_implementors_list(BoolObjectClosure* is_alive); 929 void clean_method_data(BoolObjectClosure* is_alive); 930 void clean_dependent_nmethods(); 931 932 // Explicit metaspace deallocation of fields 933 // For RedefineClasses and class file parsing errors, we need to deallocate 934 // instanceKlasses and the metadata they point to. 935 void deallocate_contents(ClassLoaderData* loader_data); 936 static void deallocate_methods(ClassLoaderData* loader_data, 937 Array<Method*>* methods); 938 void static deallocate_interfaces(ClassLoaderData* loader_data, 939 Klass* super_klass, 940 Array<Klass*>* local_interfaces, 941 Array<Klass*>* transitive_interfaces); 942 943 // The constant pool is on stack if any of the methods are executing or 944 // referenced by handles. 945 bool on_stack() const { return _constants->on_stack(); } 946 947 // callbacks for actions during class unloading 948 static void notify_unload_class(InstanceKlass* ik); 949 static void release_C_heap_structures(InstanceKlass* ik); 950 951 // Parallel Scavenge and Parallel Old 952 PARALLEL_GC_DECLS 953 954 // Naming 955 const char* signature_name() const; 956 957 // Iterators 958 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { 959 return oop_oop_iterate_v(obj, blk); 960 } 961 962 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { 963 return oop_oop_iterate_v_m(obj, blk, mr); 964 } 965 966 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ 967 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ 968 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ 969 MemRegion mr); 970 971 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) 972 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) 973 974 #if INCLUDE_ALL_GCS 975 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ 976 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); 977 978 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) 979 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) 980 #endif // INCLUDE_ALL_GCS 981 982 u2 idnum_allocated_count() const { return _idnum_allocated_count; } 983 984 public: 985 void set_in_error_state() { 986 assert(DumpSharedSpaces, "only call this when dumping archive"); 987 _init_state = initialization_error; 988 } 989 bool check_sharing_error_state(); 990 991 private: 992 // initialization state 993 #ifdef ASSERT 994 void set_init_state(ClassState state); 995 #else 996 void set_init_state(ClassState state) { _init_state = (u1)state; } 997 #endif 998 void set_rewritten() { _misc_flags |= _misc_rewritten; } 999 void set_init_thread(Thread *thread) { _init_thread = thread; } 1000 1001 // The RedefineClasses() API can cause new method idnums to be needed 1002 // which will cause the caches to grow. Safety requires different 1003 // cache management logic if the caches can grow instead of just 1004 // going from NULL to non-NULL. 1005 bool idnum_can_increment() const { return has_been_redefined(); } 1006 jmethodID* methods_jmethod_ids_acquire() const 1007 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } 1008 void release_set_methods_jmethod_ids(jmethodID* jmeths) 1009 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } 1010 1011 // Lock during initialization 1012 public: 1013 // Lock for (1) initialization; (2) access to the ConstantPool of this class. 1014 // Must be one per class and it has to be a VM internal object so java code 1015 // cannot lock it (like the mirror). 1016 // It has to be an object not a Mutex because it's held through java calls. 1017 oop init_lock() const; 1018 private: 1019 void fence_and_clear_init_lock(); 1020 1021 // Static methods that are used to implement member methods where an exposed this pointer 1022 // is needed due to possible GCs 1023 static bool link_class_impl (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS); 1024 static bool verify_code (instanceKlassHandle this_k, bool throw_verifyerror, TRAPS); 1025 static void initialize_impl (instanceKlassHandle this_k, TRAPS); 1026 static void eager_initialize_impl (instanceKlassHandle this_k); 1027 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_k, ClassState state, TRAPS); 1028 static void call_class_initializer_impl (instanceKlassHandle this_k, TRAPS); 1029 static Klass* array_klass_impl (instanceKlassHandle this_k, bool or_null, int n, TRAPS); 1030 static void do_local_static_fields_impl (instanceKlassHandle this_k, void f(fieldDescriptor* fd, Handle, TRAPS), Handle, TRAPS); 1031 /* jni_id_for_impl for jfieldID only */ 1032 static JNIid* jni_id_for_impl (instanceKlassHandle this_k, int offset); 1033 1034 // Returns the array class for the n'th dimension 1035 Klass* array_klass_impl(bool or_null, int n, TRAPS); 1036 1037 // Returns the array class with this class as element type 1038 Klass* array_klass_impl(bool or_null, TRAPS); 1039 1040 // find a local method (returns NULL if not found) 1041 Method* find_method_impl(Symbol* name, Symbol* signature, bool skipping_overpass) const; 1042 static Method* find_method_impl(Array<Method*>* methods, Symbol* name, Symbol* signature, bool skipping_overpass); 1043 1044 // Free CHeap allocated fields. 1045 void release_C_heap_structures(); 1046 1047 // RedefineClasses support 1048 void link_previous_versions(InstanceKlass* pv) { _previous_versions = pv; } 1049 void mark_newly_obsolete_methods(Array<Method*>* old_methods, int emcp_method_count); 1050 public: 1051 // CDS support - remove and restore oops from metadata. Oops are not shared. 1052 virtual void remove_unshareable_info(); 1053 virtual void restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain, TRAPS); 1054 1055 // jvm support 1056 jint compute_modifier_flags(TRAPS) const; 1057 1058 public: 1059 // JVMTI support 1060 jint jvmti_class_status() const; 1061 1062 public: 1063 // Printing 1064 #ifndef PRODUCT 1065 void print_on(outputStream* st) const; 1066 #endif 1067 void print_value_on(outputStream* st) const; 1068 1069 void oop_print_value_on(oop obj, outputStream* st); 1070 1071 #ifndef PRODUCT 1072 void oop_print_on (oop obj, outputStream* st); 1073 1074 void print_dependent_nmethods(bool verbose = false); 1075 bool is_dependent_nmethod(nmethod* nm); 1076 #endif 1077 1078 const char* internal_name() const; 1079 1080 // Verification 1081 void verify_on(outputStream* st); 1082 1083 void oop_verify_on(oop obj, outputStream* st); 1084 }; 1085 1086 inline Method* InstanceKlass::method_at_vtable(int index) { 1087 #ifndef PRODUCT 1088 assert(index >= 0, "valid vtable index"); 1089 if (DebugVtables) { 1090 verify_vtable_index(index); 1091 } 1092 #endif 1093 vtableEntry* ve = (vtableEntry*)start_of_vtable(); 1094 return ve[index].method(); 1095 } 1096 1097 // for adding methods 1098 // UNSET_IDNUM return means no more ids available 1099 inline u2 InstanceKlass::next_method_idnum() { 1100 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { 1101 return ConstMethod::UNSET_IDNUM; // no more ids available 1102 } else { 1103 return _idnum_allocated_count++; 1104 } 1105 } 1106 1107 1108 /* JNIid class for jfieldIDs only */ 1109 class JNIid: public CHeapObj<mtClass> { 1110 friend class VMStructs; 1111 private: 1112 Klass* _holder; 1113 JNIid* _next; 1114 int _offset; 1115 #ifdef ASSERT 1116 bool _is_static_field_id; 1117 #endif 1118 1119 public: 1120 // Accessors 1121 Klass* holder() const { return _holder; } 1122 int offset() const { return _offset; } 1123 JNIid* next() { return _next; } 1124 // Constructor 1125 JNIid(Klass* holder, int offset, JNIid* next); 1126 // Identifier lookup 1127 JNIid* find(int offset); 1128 1129 bool find_local_field(fieldDescriptor* fd) { 1130 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); 1131 } 1132 1133 static void deallocate(JNIid* id); 1134 // Debugging 1135 #ifdef ASSERT 1136 bool is_static_field_id() const { return _is_static_field_id; } 1137 void set_is_static_field_id() { _is_static_field_id = true; } 1138 #endif 1139 void verify(Klass* holder); 1140 }; 1141 1142 1143 // 1144 // nmethodBucket is used to record dependent nmethods for 1145 // deoptimization. nmethod dependencies are actually <klass, method> 1146 // pairs but we really only care about the klass part for purposes of 1147 // finding nmethods which might need to be deoptimized. Instead of 1148 // recording the method, a count of how many times a particular nmethod 1149 // was recorded is kept. This ensures that any recording errors are 1150 // noticed since an nmethod should be removed as many times are it's 1151 // added. 1152 // 1153 class nmethodBucket: public CHeapObj<mtClass> { 1154 friend class VMStructs; 1155 private: 1156 nmethod* _nmethod; 1157 int _count; 1158 nmethodBucket* _next; 1159 1160 public: 1161 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { 1162 _nmethod = nmethod; 1163 _next = next; 1164 _count = 1; 1165 } 1166 int count() { return _count; } 1167 int increment() { _count += 1; return _count; } 1168 int decrement(); 1169 nmethodBucket* next() { return _next; } 1170 void set_next(nmethodBucket* b) { _next = b; } 1171 nmethod* get_nmethod() { return _nmethod; } 1172 }; 1173 1174 // An iterator that's used to access the inner classes indices in the 1175 // InstanceKlass::_inner_classes array. 1176 class InnerClassesIterator : public StackObj { 1177 private: 1178 Array<jushort>* _inner_classes; 1179 int _length; 1180 int _idx; 1181 public: 1182 1183 InnerClassesIterator(instanceKlassHandle k) { 1184 _inner_classes = k->inner_classes(); 1185 if (k->inner_classes() != NULL) { 1186 _length = _inner_classes->length(); 1187 // The inner class array's length should be the multiple of 1188 // inner_class_next_offset if it only contains the InnerClasses 1189 // attribute data, or it should be 1190 // n*inner_class_next_offset+enclosing_method_attribute_size 1191 // if it also contains the EnclosingMethod data. 1192 assert((_length % InstanceKlass::inner_class_next_offset == 0 || 1193 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), 1194 "just checking"); 1195 // Remove the enclosing_method portion if exists. 1196 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { 1197 _length -= InstanceKlass::enclosing_method_attribute_size; 1198 } 1199 } else { 1200 _length = 0; 1201 } 1202 _idx = 0; 1203 } 1204 1205 int length() const { 1206 return _length; 1207 } 1208 1209 void next() { 1210 _idx += InstanceKlass::inner_class_next_offset; 1211 } 1212 1213 bool done() const { 1214 return (_idx >= _length); 1215 } 1216 1217 u2 inner_class_info_index() const { 1218 return _inner_classes->at( 1219 _idx + InstanceKlass::inner_class_inner_class_info_offset); 1220 } 1221 1222 void set_inner_class_info_index(u2 index) { 1223 _inner_classes->at_put( 1224 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); 1225 } 1226 1227 u2 outer_class_info_index() const { 1228 return _inner_classes->at( 1229 _idx + InstanceKlass::inner_class_outer_class_info_offset); 1230 } 1231 1232 void set_outer_class_info_index(u2 index) { 1233 _inner_classes->at_put( 1234 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); 1235 } 1236 1237 u2 inner_name_index() const { 1238 return _inner_classes->at( 1239 _idx + InstanceKlass::inner_class_inner_name_offset); 1240 } 1241 1242 void set_inner_name_index(u2 index) { 1243 _inner_classes->at_put( 1244 _idx + InstanceKlass::inner_class_inner_name_offset, index); 1245 } 1246 1247 u2 inner_access_flags() const { 1248 return _inner_classes->at( 1249 _idx + InstanceKlass::inner_class_access_flags_offset); 1250 } 1251 }; 1252 1253 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP