1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)systemDictionary.hpp 1.156 07/08/09 09:11:58 JVM"
3 #endif
4 /*
5 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
26 */
27
28 // The system dictionary stores all loaded classes and maps:
29 //
30 // [class name,class loader] -> class i.e. [symbolOop,oop] -> klassOop
31 //
32 // Classes are loaded lazily. The default VM class loader is
33 // represented as NULL.
34
35 // The underlying data structure is an open hash table with a fixed number
36 // of buckets. During loading the loader object is locked, (for the VM loader
37 // a private lock object is used). Class loading can thus be done concurrently,
38 // but only by different loaders.
39 //
40 // During loading a placeholder (name, loader) is temporarily placed in
41 // a side data structure, and is used to detect ClassCircularityErrors
42 // and to perform verification during GC. A GC can occur in the midst
43 // of class loading, as we call out to Java, have to take locks, etc.
44 //
45 // When class loading is finished, a new entry is added to the system
46 // dictionary and the place holder is removed. Note that the protection
47 // domain field of the system dictionary has not yet been filled in when
48 // the "real" system dictionary entry is created.
49 //
50 // Clients of this class who are interested in finding if a class has
51 // been completely loaded -- not classes in the process of being loaded --
52 // can read the SystemDictionary unlocked. This is safe because
53 // - entries are only deleted at safepoints
54 // - readers cannot come to a safepoint while actively examining
55 // an entry (an entry cannot be deleted from under a reader)
56 // - entries must be fully formed before they are available to concurrent
57 // readers (we must ensure write ordering)
58 //
59 // Note that placeholders are deleted at any time, as they are removed
60 // when a class is completely loaded. Therefore, readers as well as writers
61 // of placeholders must hold the SystemDictionary_lock.
62 //
63
64 class Dictionary;
65 class PlaceholderTable;
66 class LoaderConstraintTable;
67 class HashtableBucket;
68 class ResolutionErrorTable;
69
70 class SystemDictionary : AllStatic {
71 friend class VMStructs;
72 friend class CompactingPermGenGen;
73 NOT_PRODUCT(friend class instanceKlassKlass;)
74
75 public:
76 // Returns a class with a given class name and class loader. Loads the
77 // class if needed. If not found a NoClassDefFoundError or a
78 // ClassNotFoundException is thrown, depending on the value on the
79 // throw_error flag. For most uses the throw_error argument should be set
80 // to true.
81
82 static klassOop resolve_or_fail(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS);
83 // Convenient call for null loader and protection domain.
84 static klassOop resolve_or_fail(symbolHandle class_name, bool throw_error, TRAPS);
85 private:
86 // handle error translation for resolve_or_null results
87 static klassOop handle_resolution_exception(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS);
88
89 public:
90
91 // Returns a class with a given class name and class loader.
92 // Loads the class if needed. If not found NULL is returned.
93 static klassOop resolve_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
94 // Version with null loader and protection domain
95 static klassOop resolve_or_null(symbolHandle class_name, TRAPS);
96
97 // Resolve a superclass or superinterface. Called from ClassFileParser,
98 // parse_interfaces, resolve_instance_class_or_null, load_shared_class
99 // "child_name" is the class whose super class or interface is being resolved.
100 static klassOop resolve_super_or_fail(symbolHandle child_name,
101 symbolHandle class_name,
102 Handle class_loader,
103 Handle protection_domain,
104 bool is_superclass,
105 TRAPS);
106
107 // Parse new stream. This won't update the system dictionary or
108 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses.
109 static klassOop parse_stream(symbolHandle class_name,
110 Handle class_loader,
111 Handle protection_domain,
112 ClassFileStream* st,
113 TRAPS);
114
115 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass)
116 static klassOop resolve_from_stream(symbolHandle class_name, Handle class_loader, Handle protection_domain, ClassFileStream* st, TRAPS);
117
118 // Lookup an already loaded class. If not found NULL is returned.
119 static klassOop find(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
120
121 // Lookup an already loaded instance or array class.
122 // Do not make any queries to class loaders; consult only the cache.
123 // If not found NULL is returned.
124 static klassOop find_instance_or_array_klass(symbolHandle class_name,
125 Handle class_loader,
126 Handle protection_domain,
127 TRAPS);
128
129 // Lookup an instance or array class that has already been loaded
130 // either into the given class loader, or else into another class
131 // loader that is constrained (via loader constraints) to produce
132 // a consistent class. Do not take protection domains into account.
133 // Do not make any queries to class loaders; consult only the cache.
134 // Return NULL if the class is not found.
135 //
136 // This function is a strict superset of find_instance_or_array_klass.
137 // This function (the unchecked version) makes a conservative prediction
138 // of the result of the checked version, assuming successful lookup.
139 // If both functions return non-null, they must return the same value.
140 // Also, the unchecked version may sometimes be non-null where the
141 // checked version is null. This can occur in several ways:
142 // 1. No query has yet been made to the class loader.
143 // 2. The class loader was queried, but chose not to delegate.
144 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain.
145 // 4. Loading was attempted, but there was a linkage error of some sort.
146 // In all of these cases, the loader constraints on this type are
147 // satisfied, and it is safe for classes in the given class loader
148 // to manipulate strongly-typed values of the found class, subject
149 // to local linkage and access checks.
150 static klassOop find_constrained_instance_or_array_klass(symbolHandle class_name,
151 Handle class_loader,
152 TRAPS);
153
154 // Iterate over all klasses in dictionary
155 // Just the classes from defining class loaders
156 static void classes_do(void f(klassOop));
157 // Added for initialize_itable_for_klass to handle exceptions
158 static void classes_do(void f(klassOop, TRAPS), TRAPS);
159 // All classes, and their class loaders
160 static void classes_do(void f(klassOop, oop));
161 // All classes, and their class loaders
162 // (added for helpers that use HandleMarks and ResourceMarks)
163 static void classes_do(void f(klassOop, oop, TRAPS), TRAPS);
164 // All entries in the placeholder table and their class loaders
165 static void placeholders_do(void f(symbolOop, oop));
166
167 // Iterate over all methods in all klasses in dictionary
168 static void methods_do(void f(methodOop));
169
170 // Garbage collection support
171
172 // This method applies "blk->do_oop" to all the pointers to "system"
173 // classes and loaders.
174 static void always_strong_oops_do(OopClosure* blk);
175 static void always_strong_classes_do(OopClosure* blk);
176 // This method applies "blk->do_oop" to all the placeholders.
177 static void placeholders_do(OopClosure* blk);
178
179 // Unload (that is, break root links to) all unmarked classes and
180 // loaders. Returns "true" iff something was unloaded.
181 static bool do_unloading(BoolObjectClosure* is_alive);
182
183 // Applies "f->do_oop" to all root oops in the system dictionary.
184 static void oops_do(OopClosure* f);
185
186 // System loader lock
187 static oop system_loader_lock() { return _system_loader_lock_obj; }
188
189 private:
190 // Traverses preloaded oops: various system classes. These are
191 // guaranteed to be in the perm gen.
192 static void preloaded_oops_do(OopClosure* f);
193 static void lazily_loaded_oops_do(OopClosure* f);
194
195 public:
196 // Sharing support.
197 static void reorder_dictionary();
198 static void copy_buckets(char** top, char* end);
199 static void copy_table(char** top, char* end);
200 static void reverse();
201 static void set_shared_dictionary(HashtableBucket* t, int length,
202 int number_of_entries);
203 // Printing
204 static void print() PRODUCT_RETURN;
205 static void print_class_statistics() PRODUCT_RETURN;
206 static void print_method_statistics() PRODUCT_RETURN;
207
208 // Number of contained klasses
209 // This is both fully loaded classes and classes in the process
210 // of being loaded
211 static int number_of_classes();
212
213 // Monotonically increasing counter which grows as classes are
214 // loaded or modifications such as hot-swapping or setting/removing
215 // of breakpoints are performed
216 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; }
217 // Needed by evolution and breakpoint code
218 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; }
219
220 // Verification
221 static void verify();
222
223 #ifdef ASSERT
224 static bool is_internal_format(symbolHandle class_name);
225 #endif
226
227 // Verify class is in dictionary
228 static void verify_obj_klass_present(Handle obj,
229 symbolHandle class_name,
230 Handle class_loader);
231
232 // Initialization
233 static void initialize(TRAPS);
234
235 // Fast access to commonly used classes (preloaded)
236 static klassOop check_klass(klassOop k) {
237 assert(k != NULL, "preloaded klass not initialized");
238 return k;
239 }
240
241 public:
242 static klassOop object_klass() { return check_klass(_object_klass); }
243 static klassOop string_klass() { return check_klass(_string_klass); }
244 static klassOop class_klass() { return check_klass(_class_klass); }
245 static klassOop cloneable_klass() { return check_klass(_cloneable_klass); }
246 static klassOop classloader_klass() { return check_klass(_classloader_klass); }
247 static klassOop serializable_klass() { return check_klass(_serializable_klass); }
248 static klassOop system_klass() { return check_klass(_system_klass); }
249
250 static klassOop throwable_klass() { return check_klass(_throwable_klass); }
251 static klassOop error_klass() { return check_klass(_error_klass); }
252 static klassOop threaddeath_klass() { return check_klass(_threaddeath_klass); }
253 static klassOop exception_klass() { return check_klass(_exception_klass); }
254 static klassOop runtime_exception_klass() { return check_klass(_runtime_exception_klass); }
255 static klassOop classNotFoundException_klass() { return check_klass(_classNotFoundException_klass); }
256 static klassOop noClassDefFoundError_klass() { return check_klass(_noClassDefFoundError_klass); }
257 static klassOop linkageError_klass() { return check_klass(_linkageError_klass); }
258 static klassOop ClassCastException_klass() { return check_klass(_classCastException_klass); }
259 static klassOop ArrayStoreException_klass() { return check_klass(_arrayStoreException_klass); }
260 static klassOop virtualMachineError_klass() { return check_klass(_virtualMachineError_klass); }
261 static klassOop OutOfMemoryError_klass() { return check_klass(_outOfMemoryError_klass); }
262 static klassOop StackOverflowError_klass() { return check_klass(_StackOverflowError_klass); }
263 static klassOop IllegalMonitorStateException_klass() { return check_klass(_illegalMonitorStateException_klass); }
264 static klassOop protectionDomain_klass() { return check_klass(_protectionDomain_klass); }
265 static klassOop AccessControlContext_klass() { return check_klass(_AccessControlContext_klass); }
266 static klassOop reference_klass() { return check_klass(_reference_klass); }
267 static klassOop soft_reference_klass() { return check_klass(_soft_reference_klass); }
268 static klassOop weak_reference_klass() { return check_klass(_weak_reference_klass); }
269 static klassOop final_reference_klass() { return check_klass(_final_reference_klass); }
270 static klassOop phantom_reference_klass() { return check_klass(_phantom_reference_klass); }
271 static klassOop finalizer_klass() { return check_klass(_finalizer_klass); }
272
273 static klassOop thread_klass() { return check_klass(_thread_klass); }
274 static klassOop threadGroup_klass() { return check_klass(_threadGroup_klass); }
275 static klassOop properties_klass() { return check_klass(_properties_klass); }
276 static klassOop reflect_accessible_object_klass() { return check_klass(_reflect_accessible_object_klass); }
277 static klassOop reflect_field_klass() { return check_klass(_reflect_field_klass); }
278 static klassOop reflect_method_klass() { return check_klass(_reflect_method_klass); }
279 static klassOop reflect_constructor_klass() { return check_klass(_reflect_constructor_klass); }
280 static klassOop reflect_method_accessor_klass() {
281 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
282 return check_klass(_reflect_method_accessor_klass);
283 }
284 static klassOop reflect_constructor_accessor_klass() {
285 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
286 return check_klass(_reflect_constructor_accessor_klass);
287 }
288 // NOTE: needed too early in bootstrapping process to have checks based on JDK version
289 static klassOop reflect_magic_klass() { return _reflect_magic_klass; }
290 static klassOop reflect_delegating_classloader_klass() { return _reflect_delegating_classloader_klass; }
291 static klassOop reflect_constant_pool_klass() {
292 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
293 return _reflect_constant_pool_klass;
294 }
295 static klassOop reflect_unsafe_static_field_accessor_impl_klass() {
296 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
297 return _reflect_unsafe_static_field_accessor_impl_klass;
298 }
299
300 static klassOop vector_klass() { return check_klass(_vector_klass); }
301 static klassOop hashtable_klass() { return check_klass(_hashtable_klass); }
302 static klassOop stringBuffer_klass() { return check_klass(_stringBuffer_klass); }
303 static klassOop stackTraceElement_klass() { return check_klass(_stackTraceElement_klass); }
304
305 static klassOop java_nio_Buffer_klass() { return check_klass(_java_nio_Buffer_klass); }
306
307 static klassOop sun_misc_AtomicLongCSImpl_klass() { return _sun_misc_AtomicLongCSImpl_klass; }
308
309 // To support incremental JRE downloads (KERNEL JRE). Null if not present.
310 static klassOop sun_jkernel_DownloadManager_klass() { return _sun_jkernel_DownloadManager_klass; }
311
312 static klassOop boolean_klass() { return check_klass(_boolean_klass); }
313 static klassOop char_klass() { return check_klass(_char_klass); }
314 static klassOop float_klass() { return check_klass(_float_klass); }
315 static klassOop double_klass() { return check_klass(_double_klass); }
316 static klassOop byte_klass() { return check_klass(_byte_klass); }
317 static klassOop short_klass() { return check_klass(_short_klass); }
318 static klassOop int_klass() { return check_klass(_int_klass); }
319 static klassOop long_klass() { return check_klass(_long_klass); }
320
321 static klassOop box_klass(BasicType t) {
322 assert((uint)t < T_VOID+1, "range check");
323 return check_klass(_box_klasses[t]);
324 }
325 static BasicType box_klass_type(klassOop k); // inverse of box_klass
326
327 // methods returning lazily loaded klasses
328 // The corresponding method to load the class must be called before calling them.
329 static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); }
330
331 static void load_abstract_ownable_synchronizer_klass(TRAPS);
332
333 private:
334 // Tells whether ClassLoader.loadClassInternal is present
335 static bool has_loadClassInternal() { return _has_loadClassInternal; }
336
337 public:
338 // Tells whether ClassLoader.checkPackageAccess is present
339 static bool has_checkPackageAccess() { return _has_checkPackageAccess; }
340
341 static bool class_klass_loaded() { return _class_klass != NULL; }
342 static bool cloneable_klass_loaded() { return _cloneable_klass != NULL; }
343
344 // Returns default system loader
345 static oop java_system_loader();
346
347 // Compute the default system loader
348 static void compute_java_system_loader(TRAPS);
349
350 private:
351 // Mirrors for primitive classes (created eagerly)
352 static oop check_mirror(oop m) {
353 assert(m != NULL, "mirror not initialized");
354 return m;
355 }
356
357 public:
358 // Note: java_lang_Class::primitive_type is the inverse of java_mirror
359
360 // Check class loader constraints
361 static bool add_loader_constraint(symbolHandle name, Handle loader1,
362 Handle loader2, TRAPS);
363 static char* check_signature_loaders(symbolHandle signature, Handle loader1,
364 Handle loader2, bool is_method, TRAPS);
365
366 // Utility for printing loader "name" as part of tracing constraints
367 static const char* loader_name(oop loader) {
368 return ((loader) == NULL ? "<bootloader>" :
369 instanceKlass::cast((loader)->klass())->name()->as_C_string() );
370 }
371
372 // Record the error when the first attempt to resolve a reference from a constant
373 // pool entry to a class fails.
374 static void add_resolution_error(constantPoolHandle pool, int which, symbolHandle error);
375 static symbolOop find_resolution_error(constantPoolHandle pool, int which);
376
377 private:
378
379 enum Constants {
380 _loader_constraint_size = 107, // number of entries in constraint table
381 _resolution_error_size = 107, // number of entries in resolution error table
382 _nof_buckets = 1009 // number of buckets in hash table
383 };
384
385
386 // Static variables
387
388 // Hashtable holding loaded classes.
389 static Dictionary* _dictionary;
390
391 // Hashtable holding placeholders for classes being loaded.
392 static PlaceholderTable* _placeholders;
393
394 // Hashtable holding classes from the shared archive.
395 static Dictionary* _shared_dictionary;
396
397 // Monotonically increasing counter which grows with
398 // _number_of_classes as well as hot-swapping and breakpoint setting
399 // and removal.
400 static int _number_of_modifications;
401
402 // Lock object for system class loader
403 static oop _system_loader_lock_obj;
404
405 // Constraints on class loaders
406 static LoaderConstraintTable* _loader_constraints;
407
408 // Resolution errors
409 static ResolutionErrorTable* _resolution_errors;
410
411 public:
412 // for VM_CounterDecay iteration support
413 friend class CounterDecay;
414 static klassOop try_get_next_class();
415
416 private:
417 static void validate_protection_domain(instanceKlassHandle klass,
418 Handle class_loader,
419 Handle protection_domain, TRAPS);
420
421 friend class VM_PopulateDumpSharedSpace;
422 friend class TraversePlaceholdersClosure;
423 static Dictionary* dictionary() { return _dictionary; }
424 static Dictionary* shared_dictionary() { return _shared_dictionary; }
425 static PlaceholderTable* placeholders() { return _placeholders; }
426 static LoaderConstraintTable* constraints() { return _loader_constraints; }
427 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; }
428
429 // Basic loading operations
430 static klassOop resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
431 static klassOop resolve_array_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
432 static instanceKlassHandle handle_parallel_super_load(symbolHandle class_name, symbolHandle supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS);
433 // Wait on SystemDictionary_lock; unlocks lockObject before
434 // waiting; relocks lockObject with correct recursion count
435 // after waiting, but before reentering SystemDictionary_lock
436 // to preserve lock order semantics.
437 static void double_lock_wait(Handle lockObject, TRAPS);
438 static void define_instance_class(instanceKlassHandle k, TRAPS);
439 static instanceKlassHandle find_or_define_instance_class(symbolHandle class_name,
440 Handle class_loader,
441 instanceKlassHandle k, TRAPS);
442 static instanceKlassHandle load_shared_class(symbolHandle class_name,
443 Handle class_loader, TRAPS);
444 static instanceKlassHandle load_shared_class(instanceKlassHandle ik,
445 Handle class_loader, TRAPS);
446 static instanceKlassHandle load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS);
447 static Handle compute_loader_lock_object(Handle class_loader, TRAPS);
448 static void check_loader_lock_contention(Handle loader_lock, TRAPS);
449
450 static klassOop find_shared_class(symbolHandle class_name);
451
452 // Setup link to hierarchy
453 static void add_to_hierarchy(instanceKlassHandle k, TRAPS);
454
455 private:
456 // We pass in the hashtable index so we can calculate it outside of
457 // the SystemDictionary_lock.
458
459 // Basic find on loaded classes
460 static klassOop find_class(int index, unsigned int hash,
461 symbolHandle name, Handle loader);
462
463 // Basic find on classes in the midst of being loaded
464 static symbolOop find_placeholder(int index, unsigned int hash,
465 symbolHandle name, Handle loader);
466
467 // Basic find operation of loaded classes and classes in the midst
468 // of loading; used for assertions and verification only.
469 static oop find_class_or_placeholder(symbolHandle class_name,
470 Handle class_loader);
471
472 // Updating entry in dictionary
473 // Add a completely loaded class
474 static void add_klass(int index, symbolHandle class_name,
475 Handle class_loader, KlassHandle obj);
476
477 // Add a placeholder for a class being loaded
478 static void add_placeholder(int index,
479 symbolHandle class_name,
480 Handle class_loader);
481 static void remove_placeholder(int index,
482 symbolHandle class_name,
483 Handle class_loader);
484
485 // Performs cleanups after resolve_super_or_fail. This typically needs
486 // to be called on failure.
487 // Won't throw, but can block.
488 static void resolution_cleanups(symbolHandle class_name,
489 Handle class_loader,
490 TRAPS);
491
492 // Initialization
493 static void initialize_preloaded_classes(TRAPS);
494
495 // Class loader constraints
496 static void check_constraints(int index, unsigned int hash,
497 instanceKlassHandle k, Handle loader,
498 bool defining, TRAPS);
499 static void update_dictionary(int d_index, unsigned int d_hash,
500 int p_index, unsigned int p_hash,
501 instanceKlassHandle k, Handle loader, TRAPS);
502
503 // Variables holding commonly used klasses (preloaded)
504 static klassOop _object_klass;
505 static klassOop _string_klass;
506 static klassOop _class_klass;
507 static klassOop _cloneable_klass;
508 static klassOop _classloader_klass;
509 static klassOop _serializable_klass;
510 static klassOop _system_klass;
511
512 static klassOop _throwable_klass;
513 static klassOop _error_klass;
514 static klassOop _threaddeath_klass;
515 static klassOop _exception_klass;
516 static klassOop _runtime_exception_klass;
517 static klassOop _classNotFoundException_klass;
518 static klassOop _noClassDefFoundError_klass;
519 static klassOop _linkageError_klass;
520 static klassOop _classCastException_klass;
521 static klassOop _arrayStoreException_klass;
522 static klassOop _virtualMachineError_klass;
523 static klassOop _outOfMemoryError_klass;
524 static klassOop _StackOverflowError_klass;
525 static klassOop _illegalMonitorStateException_klass;
526 static klassOop _protectionDomain_klass;
527 static klassOop _AccessControlContext_klass;
528 static klassOop _reference_klass;
529 static klassOop _soft_reference_klass;
530 static klassOop _weak_reference_klass;
531 static klassOop _final_reference_klass;
532 static klassOop _phantom_reference_klass;
533 static klassOop _finalizer_klass;
534
535 static klassOop _thread_klass;
536 static klassOop _threadGroup_klass;
537 static klassOop _properties_klass;
538 static klassOop _reflect_accessible_object_klass;
539 static klassOop _reflect_field_klass;
540 static klassOop _reflect_method_klass;
541 static klassOop _reflect_constructor_klass;
542 // 1.4 reflection implementation
543 static klassOop _reflect_magic_klass;
544 static klassOop _reflect_method_accessor_klass;
545 static klassOop _reflect_constructor_accessor_klass;
546 static klassOop _reflect_delegating_classloader_klass;
547 // 1.5 annotations implementation
548 static klassOop _reflect_constant_pool_klass;
549 static klassOop _reflect_unsafe_static_field_accessor_impl_klass;
550
551 static klassOop _stringBuffer_klass;
552 static klassOop _vector_klass;
553 static klassOop _hashtable_klass;
554
555 static klassOop _stackTraceElement_klass;
556
557 static klassOop _java_nio_Buffer_klass;
558
559 static klassOop _sun_misc_AtomicLongCSImpl_klass;
560
561 // KERNEL JRE support.
562 static klassOop _sun_jkernel_DownloadManager_klass;
563
564 // Lazily loaded klasses
565 static volatile klassOop _abstract_ownable_synchronizer_klass;
566
567 // Box klasses
568 static klassOop _boolean_klass;
569 static klassOop _char_klass;
570 static klassOop _float_klass;
571 static klassOop _double_klass;
572 static klassOop _byte_klass;
573 static klassOop _short_klass;
574 static klassOop _int_klass;
575 static klassOop _long_klass;
576
577 // table of same
578 static klassOop _box_klasses[T_VOID+1];
579
580 static oop _java_system_loader;
581
582 static bool _has_loadClassInternal;
583 static bool _has_checkPackageAccess;
584 };