rev 2 : [mq]: wkk.patch
1 /* 2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 // The system dictionary stores all loaded classes and maps: 26 // 27 // [class name,class loader] -> class i.e. [symbolOop,oop] -> klassOop 28 // 29 // Classes are loaded lazily. The default VM class loader is 30 // represented as NULL. 31 32 // The underlying data structure is an open hash table with a fixed number 33 // of buckets. During loading the loader object is locked, (for the VM loader 34 // a private lock object is used). Class loading can thus be done concurrently, 35 // but only by different loaders. 36 // 37 // During loading a placeholder (name, loader) is temporarily placed in 38 // a side data structure, and is used to detect ClassCircularityErrors 39 // and to perform verification during GC. A GC can occur in the midst 40 // of class loading, as we call out to Java, have to take locks, etc. 41 // 42 // When class loading is finished, a new entry is added to the system 43 // dictionary and the place holder is removed. Note that the protection 44 // domain field of the system dictionary has not yet been filled in when 45 // the "real" system dictionary entry is created. 46 // 47 // Clients of this class who are interested in finding if a class has 48 // been completely loaded -- not classes in the process of being loaded -- 49 // can read the SystemDictionary unlocked. This is safe because 50 // - entries are only deleted at safepoints 51 // - readers cannot come to a safepoint while actively examining 52 // an entry (an entry cannot be deleted from under a reader) 53 // - entries must be fully formed before they are available to concurrent 54 // readers (we must ensure write ordering) 55 // 56 // Note that placeholders are deleted at any time, as they are removed 57 // when a class is completely loaded. Therefore, readers as well as writers 58 // of placeholders must hold the SystemDictionary_lock. 59 // 60 61 class Dictionary; 62 class PlaceholderTable; 63 class LoaderConstraintTable; 64 class HashtableBucket; 65 class ResolutionErrorTable; 66 67 // Certain classes are preloaded, such as java.lang.Object and java.lang.String. 68 // They are all "well-known", in the sense that no class loader is allowed 69 // to provide a different definition. 70 // 71 // These klasses must all have names defined in vmSymbols. 72 73 #define WK_KLASS_ENUM_NAME(kname) kname##_knum 74 75 // Each well-known class has a short klass name (like object_klass), 76 // a vmSymbol name (like java_lang_Object), and a flag word 77 // that makes some minor distinctions, like whether the klass 78 // is preloaded, optional, release-specific, etc. 79 // The order of these definitions is significant; it is the order in which 80 // preloading is actually performed by initialize_preloaded_classes. 81 82 #define WK_KLASSES_DO(template) \ 83 /* well-known classes */ \ 84 template(object_klass, java_lang_Object, Pre) \ 85 template(string_klass, java_lang_String, Pre) \ 86 template(class_klass, java_lang_Class, Pre) \ 87 template(cloneable_klass, java_lang_Cloneable, Pre) \ 88 template(classloader_klass, java_lang_ClassLoader, Pre) \ 89 template(serializable_klass, java_io_Serializable, Pre) \ 90 template(system_klass, java_lang_System, Pre) \ 91 template(throwable_klass, java_lang_Throwable, Pre) \ 92 template(error_klass, java_lang_Error, Pre) \ 93 template(threaddeath_klass, java_lang_ThreadDeath, Pre) \ 94 template(exception_klass, java_lang_Exception, Pre) \ 95 template(runtime_exception_klass, java_lang_RuntimeException, Pre) \ 96 template(protectionDomain_klass, java_security_ProtectionDomain, Pre) \ 97 template(AccessControlContext_klass, java_security_AccessControlContext, Pre) \ 98 template(classNotFoundException_klass, java_lang_ClassNotFoundException, Pre) \ 99 template(noClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre) \ 100 template(linkageError_klass, java_lang_LinkageError, Pre) \ 101 template(ClassCastException_klass, java_lang_ClassCastException, Pre) \ 102 template(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre) \ 103 template(virtualMachineError_klass, java_lang_VirtualMachineError, Pre) \ 104 template(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre) \ 105 template(StackOverflowError_klass, java_lang_StackOverflowError, Pre) \ 106 template(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre) \ 107 template(reference_klass, java_lang_ref_Reference, Pre) \ 108 \ 109 /* Preload ref klasses and set reference types */ \ 110 template(soft_reference_klass, java_lang_ref_SoftReference, Pre) \ 111 template(weak_reference_klass, java_lang_ref_WeakReference, Pre) \ 112 template(final_reference_klass, java_lang_ref_FinalReference, Pre) \ 113 template(phantom_reference_klass, java_lang_ref_PhantomReference, Pre) \ 114 template(finalizer_klass, java_lang_ref_Finalizer, Pre) \ 115 \ 116 template(thread_klass, java_lang_Thread, Pre) \ 117 template(threadGroup_klass, java_lang_ThreadGroup, Pre) \ 118 template(properties_klass, java_util_Properties, Pre) \ 119 template(reflect_accessible_object_klass, java_lang_reflect_AccessibleObject, Pre) \ 120 template(reflect_field_klass, java_lang_reflect_Field, Pre) \ 121 template(reflect_method_klass, java_lang_reflect_Method, Pre) \ 122 template(reflect_constructor_klass, java_lang_reflect_Constructor, Pre) \ 123 \ 124 /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \ 125 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ 126 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ 127 template(reflect_magic_klass, sun_reflect_MagicAccessorImpl, Opt) \ 128 template(reflect_method_accessor_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \ 129 template(reflect_constructor_accessor_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \ 130 template(reflect_delegating_classloader_klass, sun_reflect_DelegatingClassLoader, Opt) \ 131 template(reflect_constant_pool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15) \ 132 template(reflect_unsafe_static_field_accessor_impl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15) \ 133 \ 134 template(vector_klass, java_util_Vector, Pre) \ 135 template(hashtable_klass, java_util_Hashtable, Pre) \ 136 template(stringBuffer_klass, java_lang_StringBuffer, Pre) \ 137 \ 138 /* It's NULL in non-1.4 JDKs. */ \ 139 template(stackTraceElement_klass, java_lang_StackTraceElement, Opt) \ 140 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ 141 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ 142 template(java_nio_Buffer_klass, java_nio_Buffer, Opt) \ 143 \ 144 /* If this class isn't present, it won't be referenced. */ \ 145 template(sun_misc_AtomicLongCSImpl_klass, sun_misc_AtomicLongCSImpl, Opt) \ 146 \ 147 /* Preload boxing klasses */ \ 148 template(boolean_klass, java_lang_Boolean, Pre) \ 149 template(char_klass, java_lang_Character, Pre) \ 150 template(float_klass, java_lang_Float, Pre) \ 151 template(double_klass, java_lang_Double, Pre) \ 152 template(byte_klass, java_lang_Byte, Pre) \ 153 template(short_klass, java_lang_Short, Pre) \ 154 template(int_klass, java_lang_Integer, Pre) \ 155 template(long_klass, java_lang_Long, Pre) \ 156 /*end*/ 157 158 159 class SystemDictionary : AllStatic { 160 friend class VMStructs; 161 friend class CompactingPermGenGen; 162 NOT_PRODUCT(friend class instanceKlassKlass;) 163 164 public: 165 enum WKID { 166 NO_WKID = 0, 167 168 #define WK_KLASS_ENUM(name, ignore_s, ignore_o) WK_KLASS_ENUM_NAME(name), 169 WK_KLASSES_DO(WK_KLASS_ENUM) 170 #undef WK_KLASS_ENUM 171 172 WKID_LIMIT, 173 174 FIRST_WKID = NO_WKID + 1 175 }; 176 177 enum InitOption { 178 Pre, // preloaded; error if not present 179 180 // Order is significant. Options before this point require resolve_or_fail. 181 // Options after this point will use resolve_or_null instead. 182 183 Opt, // preload tried; NULL if not present 184 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection 185 Opt_Only_JDK15 // preload tried; use only with JDK1.5+ 186 }; 187 188 189 // Returns a class with a given class name and class loader. Loads the 190 // class if needed. If not found a NoClassDefFoundError or a 191 // ClassNotFoundException is thrown, depending on the value on the 192 // throw_error flag. For most uses the throw_error argument should be set 193 // to true. 194 195 static klassOop resolve_or_fail(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); 196 // Convenient call for null loader and protection domain. 197 static klassOop resolve_or_fail(symbolHandle class_name, bool throw_error, TRAPS); 198 private: 199 // handle error translation for resolve_or_null results 200 static klassOop handle_resolution_exception(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); 201 202 public: 203 204 // Returns a class with a given class name and class loader. 205 // Loads the class if needed. If not found NULL is returned. 206 static klassOop resolve_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); 207 // Version with null loader and protection domain 208 static klassOop resolve_or_null(symbolHandle class_name, TRAPS); 209 210 // Resolve a superclass or superinterface. Called from ClassFileParser, 211 // parse_interfaces, resolve_instance_class_or_null, load_shared_class 212 // "child_name" is the class whose super class or interface is being resolved. 213 static klassOop resolve_super_or_fail(symbolHandle child_name, 214 symbolHandle class_name, 215 Handle class_loader, 216 Handle protection_domain, 217 bool is_superclass, 218 TRAPS); 219 220 // Parse new stream. This won't update the system dictionary or 221 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. 222 static klassOop parse_stream(symbolHandle class_name, 223 Handle class_loader, 224 Handle protection_domain, 225 ClassFileStream* st, 226 TRAPS); 227 228 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) 229 static klassOop resolve_from_stream(symbolHandle class_name, Handle class_loader, Handle protection_domain, ClassFileStream* st, TRAPS); 230 231 // Lookup an already loaded class. If not found NULL is returned. 232 static klassOop find(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); 233 234 // Lookup an already loaded instance or array class. 235 // Do not make any queries to class loaders; consult only the cache. 236 // If not found NULL is returned. 237 static klassOop find_instance_or_array_klass(symbolHandle class_name, 238 Handle class_loader, 239 Handle protection_domain, 240 TRAPS); 241 242 // If the given name is known to vmSymbols, return the well-know klass: 243 static klassOop find_well_known_klass(symbolOop class_name); 244 245 // Lookup an instance or array class that has already been loaded 246 // either into the given class loader, or else into another class 247 // loader that is constrained (via loader constraints) to produce 248 // a consistent class. Do not take protection domains into account. 249 // Do not make any queries to class loaders; consult only the cache. 250 // Return NULL if the class is not found. 251 // 252 // This function is a strict superset of find_instance_or_array_klass. 253 // This function (the unchecked version) makes a conservative prediction 254 // of the result of the checked version, assuming successful lookup. 255 // If both functions return non-null, they must return the same value. 256 // Also, the unchecked version may sometimes be non-null where the 257 // checked version is null. This can occur in several ways: 258 // 1. No query has yet been made to the class loader. 259 // 2. The class loader was queried, but chose not to delegate. 260 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. 261 // 4. Loading was attempted, but there was a linkage error of some sort. 262 // In all of these cases, the loader constraints on this type are 263 // satisfied, and it is safe for classes in the given class loader 264 // to manipulate strongly-typed values of the found class, subject 265 // to local linkage and access checks. 266 static klassOop find_constrained_instance_or_array_klass(symbolHandle class_name, 267 Handle class_loader, 268 TRAPS); 269 270 // Iterate over all klasses in dictionary 271 // Just the classes from defining class loaders 272 static void classes_do(void f(klassOop)); 273 // Added for initialize_itable_for_klass to handle exceptions 274 static void classes_do(void f(klassOop, TRAPS), TRAPS); 275 // All classes, and their class loaders 276 static void classes_do(void f(klassOop, oop)); 277 // All classes, and their class loaders 278 // (added for helpers that use HandleMarks and ResourceMarks) 279 static void classes_do(void f(klassOop, oop, TRAPS), TRAPS); 280 // All entries in the placeholder table and their class loaders 281 static void placeholders_do(void f(symbolOop, oop)); 282 283 // Iterate over all methods in all klasses in dictionary 284 static void methods_do(void f(methodOop)); 285 286 // Garbage collection support 287 288 // This method applies "blk->do_oop" to all the pointers to "system" 289 // classes and loaders. 290 static void always_strong_oops_do(OopClosure* blk); 291 static void always_strong_classes_do(OopClosure* blk); 292 // This method applies "blk->do_oop" to all the placeholders. 293 static void placeholders_do(OopClosure* blk); 294 295 // Unload (that is, break root links to) all unmarked classes and 296 // loaders. Returns "true" iff something was unloaded. 297 static bool do_unloading(BoolObjectClosure* is_alive); 298 299 // Applies "f->do_oop" to all root oops in the system dictionary. 300 static void oops_do(OopClosure* f); 301 302 // System loader lock 303 static oop system_loader_lock() { return _system_loader_lock_obj; } 304 305 private: 306 // Traverses preloaded oops: various system classes. These are 307 // guaranteed to be in the perm gen. 308 static void preloaded_oops_do(OopClosure* f); 309 static void lazily_loaded_oops_do(OopClosure* f); 310 311 public: 312 // Sharing support. 313 static void reorder_dictionary(); 314 static void copy_buckets(char** top, char* end); 315 static void copy_table(char** top, char* end); 316 static void reverse(); 317 static void set_shared_dictionary(HashtableBucket* t, int length, 318 int number_of_entries); 319 // Printing 320 static void print() PRODUCT_RETURN; 321 static void print_class_statistics() PRODUCT_RETURN; 322 static void print_method_statistics() PRODUCT_RETURN; 323 324 // Number of contained klasses 325 // This is both fully loaded classes and classes in the process 326 // of being loaded 327 static int number_of_classes(); 328 329 // Monotonically increasing counter which grows as classes are 330 // loaded or modifications such as hot-swapping or setting/removing 331 // of breakpoints are performed 332 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } 333 // Needed by evolution and breakpoint code 334 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } 335 336 // Verification 337 static void verify(); 338 339 #ifdef ASSERT 340 static bool is_internal_format(symbolHandle class_name); 341 #endif 342 343 // Verify class is in dictionary 344 static void verify_obj_klass_present(Handle obj, 345 symbolHandle class_name, 346 Handle class_loader); 347 348 // Initialization 349 static void initialize(TRAPS); 350 351 // Fast access to commonly used classes (preloaded) 352 static klassOop check_klass(klassOop k) { 353 assert(k != NULL, "preloaded klass not initialized"); 354 return k; 355 } 356 357 static klassOop check_klass_Pre(klassOop k) { return check_klass(k); } 358 static klassOop check_klass_Opt(klassOop k) { return k; } 359 static klassOop check_klass_Opt_Only_JDK15(klassOop k) { 360 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); 361 return k; 362 } 363 static klassOop check_klass_Opt_Only_JDK14NewRef(klassOop k) { 364 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); 365 // despite the optional loading, if you use this it must be present: 366 return check_klass(k); 367 } 368 369 static bool initialize_wk_klass(WKID id, bool must_load, TRAPS); 370 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); 371 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { 372 int limit = (int)end_id + 1; 373 initialize_wk_klasses_until((WKID) limit, start_id, THREAD); 374 } 375 376 public: 377 #define WK_KLASS_DECLARE(name, ignore_symbol, option) \ 378 static klassOop name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } 379 WK_KLASSES_DO(WK_KLASS_DECLARE); 380 #undef WK_KLASS_DECLARE 381 382 // Local definition for direct access to the private array: 383 #define WK_KLASS(name) _well_known_klasses[WK_KLASS_ENUM_NAME(name)] 384 385 static klassOop box_klass(BasicType t) { 386 assert((uint)t < T_VOID+1, "range check"); 387 return check_klass(_box_klasses[t]); 388 } 389 static BasicType box_klass_type(klassOop k); // inverse of box_klass 390 391 // methods returning lazily loaded klasses 392 // The corresponding method to load the class must be called before calling them. 393 static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } 394 395 static void load_abstract_ownable_synchronizer_klass(TRAPS); 396 397 private: 398 // Tells whether ClassLoader.loadClassInternal is present 399 static bool has_loadClassInternal() { return _has_loadClassInternal; } 400 401 public: 402 // Tells whether ClassLoader.checkPackageAccess is present 403 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } 404 405 static bool class_klass_loaded() { return WK_KLASS(class_klass) != NULL; } 406 static bool cloneable_klass_loaded() { return WK_KLASS(cloneable_klass) != NULL; } 407 408 // Returns default system loader 409 static oop java_system_loader(); 410 411 // Compute the default system loader 412 static void compute_java_system_loader(TRAPS); 413 414 private: 415 // Mirrors for primitive classes (created eagerly) 416 static oop check_mirror(oop m) { 417 assert(m != NULL, "mirror not initialized"); 418 return m; 419 } 420 421 public: 422 // Note: java_lang_Class::primitive_type is the inverse of java_mirror 423 424 // Check class loader constraints 425 static bool add_loader_constraint(symbolHandle name, Handle loader1, 426 Handle loader2, TRAPS); 427 static char* check_signature_loaders(symbolHandle signature, Handle loader1, 428 Handle loader2, bool is_method, TRAPS); 429 430 // Utility for printing loader "name" as part of tracing constraints 431 static const char* loader_name(oop loader) { 432 return ((loader) == NULL ? "<bootloader>" : 433 instanceKlass::cast((loader)->klass())->name()->as_C_string() ); 434 } 435 436 // Record the error when the first attempt to resolve a reference from a constant 437 // pool entry to a class fails. 438 static void add_resolution_error(constantPoolHandle pool, int which, symbolHandle error); 439 static symbolOop find_resolution_error(constantPoolHandle pool, int which); 440 441 private: 442 443 enum Constants { 444 _loader_constraint_size = 107, // number of entries in constraint table 445 _resolution_error_size = 107, // number of entries in resolution error table 446 _nof_buckets = 1009 // number of buckets in hash table 447 }; 448 449 450 // Static variables 451 452 // Hashtable holding loaded classes. 453 static Dictionary* _dictionary; 454 455 // Hashtable holding placeholders for classes being loaded. 456 static PlaceholderTable* _placeholders; 457 458 // Hashtable holding classes from the shared archive. 459 static Dictionary* _shared_dictionary; 460 461 // Monotonically increasing counter which grows with 462 // _number_of_classes as well as hot-swapping and breakpoint setting 463 // and removal. 464 static int _number_of_modifications; 465 466 // Lock object for system class loader 467 static oop _system_loader_lock_obj; 468 469 // Constraints on class loaders 470 static LoaderConstraintTable* _loader_constraints; 471 472 // Resolution errors 473 static ResolutionErrorTable* _resolution_errors; 474 475 public: 476 // for VM_CounterDecay iteration support 477 friend class CounterDecay; 478 static klassOop try_get_next_class(); 479 480 private: 481 static void validate_protection_domain(instanceKlassHandle klass, 482 Handle class_loader, 483 Handle protection_domain, TRAPS); 484 485 friend class VM_PopulateDumpSharedSpace; 486 friend class TraversePlaceholdersClosure; 487 static Dictionary* dictionary() { return _dictionary; } 488 static Dictionary* shared_dictionary() { return _shared_dictionary; } 489 static PlaceholderTable* placeholders() { return _placeholders; } 490 static LoaderConstraintTable* constraints() { return _loader_constraints; } 491 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } 492 493 // Basic loading operations 494 static klassOop resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); 495 static klassOop resolve_array_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); 496 static instanceKlassHandle handle_parallel_super_load(symbolHandle class_name, symbolHandle supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); 497 // Wait on SystemDictionary_lock; unlocks lockObject before 498 // waiting; relocks lockObject with correct recursion count 499 // after waiting, but before reentering SystemDictionary_lock 500 // to preserve lock order semantics. 501 static void double_lock_wait(Handle lockObject, TRAPS); 502 static void define_instance_class(instanceKlassHandle k, TRAPS); 503 static instanceKlassHandle find_or_define_instance_class(symbolHandle class_name, 504 Handle class_loader, 505 instanceKlassHandle k, TRAPS); 506 static instanceKlassHandle load_shared_class(symbolHandle class_name, 507 Handle class_loader, TRAPS); 508 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, 509 Handle class_loader, TRAPS); 510 static instanceKlassHandle load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS); 511 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); 512 static void check_loader_lock_contention(Handle loader_lock, TRAPS); 513 514 static klassOop find_shared_class(symbolHandle class_name); 515 516 // Setup link to hierarchy 517 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); 518 519 private: 520 // We pass in the hashtable index so we can calculate it outside of 521 // the SystemDictionary_lock. 522 523 // Basic find on loaded classes 524 static klassOop find_class(int index, unsigned int hash, 525 symbolHandle name, Handle loader); 526 527 // Basic find on classes in the midst of being loaded 528 static symbolOop find_placeholder(int index, unsigned int hash, 529 symbolHandle name, Handle loader); 530 531 // Basic find operation of loaded classes and classes in the midst 532 // of loading; used for assertions and verification only. 533 static oop find_class_or_placeholder(symbolHandle class_name, 534 Handle class_loader); 535 536 // Updating entry in dictionary 537 // Add a completely loaded class 538 static void add_klass(int index, symbolHandle class_name, 539 Handle class_loader, KlassHandle obj); 540 541 // Add a placeholder for a class being loaded 542 static void add_placeholder(int index, 543 symbolHandle class_name, 544 Handle class_loader); 545 static void remove_placeholder(int index, 546 symbolHandle class_name, 547 Handle class_loader); 548 549 // Performs cleanups after resolve_super_or_fail. This typically needs 550 // to be called on failure. 551 // Won't throw, but can block. 552 static void resolution_cleanups(symbolHandle class_name, 553 Handle class_loader, 554 TRAPS); 555 556 // Initialization 557 static void initialize_preloaded_classes(TRAPS); 558 559 // Class loader constraints 560 static void check_constraints(int index, unsigned int hash, 561 instanceKlassHandle k, Handle loader, 562 bool defining, TRAPS); 563 static void update_dictionary(int d_index, unsigned int d_hash, 564 int p_index, unsigned int p_hash, 565 instanceKlassHandle k, Handle loader, TRAPS); 566 567 // Variables holding commonly used klasses (preloaded) 568 static klassOop _well_known_klasses[]; 569 570 // Lazily loaded klasses 571 static volatile klassOop _abstract_ownable_synchronizer_klass; 572 573 // table of box klasses (int_klass, etc.) 574 static klassOop _box_klasses[T_VOID+1]; 575 576 static oop _java_system_loader; 577 578 static bool _has_loadClassInternal; 579 static bool _has_checkPackageAccess; 580 }; --- EOF ---