Mercurial > hg > truffle
comparison src/share/vm/classfile/systemDictionary.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 60b728ec77c1 |
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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 class SystemDictionary : AllStatic { | |
68 friend class VMStructs; | |
69 friend class CompactingPermGenGen; | |
70 NOT_PRODUCT(friend class instanceKlassKlass;) | |
71 | |
72 public: | |
73 // Returns a class with a given class name and class loader. Loads the | |
74 // class if needed. If not found a NoClassDefFoundError or a | |
75 // ClassNotFoundException is thrown, depending on the value on the | |
76 // throw_error flag. For most uses the throw_error argument should be set | |
77 // to true. | |
78 | |
79 static klassOop resolve_or_fail(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); | |
80 // Convenient call for null loader and protection domain. | |
81 static klassOop resolve_or_fail(symbolHandle class_name, bool throw_error, TRAPS); | |
82 private: | |
83 // handle error translation for resolve_or_null results | |
84 static klassOop handle_resolution_exception(symbolHandle class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); | |
85 | |
86 public: | |
87 | |
88 // Returns a class with a given class name and class loader. | |
89 // Loads the class if needed. If not found NULL is returned. | |
90 static klassOop resolve_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); | |
91 // Version with null loader and protection domain | |
92 static klassOop resolve_or_null(symbolHandle class_name, TRAPS); | |
93 | |
94 // Resolve a superclass or superinterface. Called from ClassFileParser, | |
95 // parse_interfaces, resolve_instance_class_or_null, load_shared_class | |
96 // "child_name" is the class whose super class or interface is being resolved. | |
97 static klassOop resolve_super_or_fail(symbolHandle child_name, | |
98 symbolHandle class_name, | |
99 Handle class_loader, | |
100 Handle protection_domain, | |
101 bool is_superclass, | |
102 TRAPS); | |
103 | |
104 // Parse new stream. This won't update the system dictionary or | |
105 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. | |
106 static klassOop parse_stream(symbolHandle class_name, | |
107 Handle class_loader, | |
108 Handle protection_domain, | |
109 ClassFileStream* st, | |
110 TRAPS); | |
111 | |
112 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) | |
113 static klassOop resolve_from_stream(symbolHandle class_name, Handle class_loader, Handle protection_domain, ClassFileStream* st, TRAPS); | |
114 | |
115 // Lookup an already loaded class. If not found NULL is returned. | |
116 static klassOop find(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); | |
117 | |
118 // Lookup an already loaded instance or array class. | |
119 // Do not make any queries to class loaders; consult only the cache. | |
120 // If not found NULL is returned. | |
121 static klassOop find_instance_or_array_klass(symbolHandle class_name, | |
122 Handle class_loader, | |
123 Handle protection_domain, | |
124 TRAPS); | |
125 | |
126 // Lookup an instance or array class that has already been loaded | |
127 // either into the given class loader, or else into another class | |
128 // loader that is constrained (via loader constraints) to produce | |
129 // a consistent class. Do not take protection domains into account. | |
130 // Do not make any queries to class loaders; consult only the cache. | |
131 // Return NULL if the class is not found. | |
132 // | |
133 // This function is a strict superset of find_instance_or_array_klass. | |
134 // This function (the unchecked version) makes a conservative prediction | |
135 // of the result of the checked version, assuming successful lookup. | |
136 // If both functions return non-null, they must return the same value. | |
137 // Also, the unchecked version may sometimes be non-null where the | |
138 // checked version is null. This can occur in several ways: | |
139 // 1. No query has yet been made to the class loader. | |
140 // 2. The class loader was queried, but chose not to delegate. | |
141 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. | |
142 // 4. Loading was attempted, but there was a linkage error of some sort. | |
143 // In all of these cases, the loader constraints on this type are | |
144 // satisfied, and it is safe for classes in the given class loader | |
145 // to manipulate strongly-typed values of the found class, subject | |
146 // to local linkage and access checks. | |
147 static klassOop find_constrained_instance_or_array_klass(symbolHandle class_name, | |
148 Handle class_loader, | |
149 TRAPS); | |
150 | |
151 // Iterate over all klasses in dictionary | |
152 // Just the classes from defining class loaders | |
153 static void classes_do(void f(klassOop)); | |
154 // Added for initialize_itable_for_klass to handle exceptions | |
155 static void classes_do(void f(klassOop, TRAPS), TRAPS); | |
156 // All classes, and their class loaders | |
157 static void classes_do(void f(klassOop, oop)); | |
158 // All classes, and their class loaders | |
159 // (added for helpers that use HandleMarks and ResourceMarks) | |
160 static void classes_do(void f(klassOop, oop, TRAPS), TRAPS); | |
161 // All entries in the placeholder table and their class loaders | |
162 static void placeholders_do(void f(symbolOop, oop)); | |
163 | |
164 // Iterate over all methods in all klasses in dictionary | |
165 static void methods_do(void f(methodOop)); | |
166 | |
167 // Garbage collection support | |
168 | |
169 // This method applies "blk->do_oop" to all the pointers to "system" | |
170 // classes and loaders. | |
171 static void always_strong_oops_do(OopClosure* blk); | |
172 static void always_strong_classes_do(OopClosure* blk); | |
173 // This method applies "blk->do_oop" to all the placeholders. | |
174 static void placeholders_do(OopClosure* blk); | |
175 | |
176 // Unload (that is, break root links to) all unmarked classes and | |
177 // loaders. Returns "true" iff something was unloaded. | |
178 static bool do_unloading(BoolObjectClosure* is_alive); | |
179 | |
180 // Applies "f->do_oop" to all root oops in the system dictionary. | |
181 static void oops_do(OopClosure* f); | |
182 | |
183 // System loader lock | |
184 static oop system_loader_lock() { return _system_loader_lock_obj; } | |
185 | |
186 private: | |
187 // Traverses preloaded oops: various system classes. These are | |
188 // guaranteed to be in the perm gen. | |
189 static void preloaded_oops_do(OopClosure* f); | |
190 static void lazily_loaded_oops_do(OopClosure* f); | |
191 | |
192 public: | |
193 // Sharing support. | |
194 static void reorder_dictionary(); | |
195 static void copy_buckets(char** top, char* end); | |
196 static void copy_table(char** top, char* end); | |
197 static void reverse(); | |
198 static void set_shared_dictionary(HashtableBucket* t, int length, | |
199 int number_of_entries); | |
200 // Printing | |
201 static void print() PRODUCT_RETURN; | |
202 static void print_class_statistics() PRODUCT_RETURN; | |
203 static void print_method_statistics() PRODUCT_RETURN; | |
204 | |
205 // Number of contained klasses | |
206 // This is both fully loaded classes and classes in the process | |
207 // of being loaded | |
208 static int number_of_classes(); | |
209 | |
210 // Monotonically increasing counter which grows as classes are | |
211 // loaded or modifications such as hot-swapping or setting/removing | |
212 // of breakpoints are performed | |
213 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } | |
214 // Needed by evolution and breakpoint code | |
215 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } | |
216 | |
217 // Verification | |
218 static void verify(); | |
219 | |
220 #ifdef ASSERT | |
221 static bool is_internal_format(symbolHandle class_name); | |
222 #endif | |
223 | |
224 // Verify class is in dictionary | |
225 static void verify_obj_klass_present(Handle obj, | |
226 symbolHandle class_name, | |
227 Handle class_loader); | |
228 | |
229 // Initialization | |
230 static void initialize(TRAPS); | |
231 | |
232 // Fast access to commonly used classes (preloaded) | |
233 static klassOop check_klass(klassOop k) { | |
234 assert(k != NULL, "preloaded klass not initialized"); | |
235 return k; | |
236 } | |
237 | |
238 public: | |
239 static klassOop object_klass() { return check_klass(_object_klass); } | |
240 static klassOop string_klass() { return check_klass(_string_klass); } | |
241 static klassOop class_klass() { return check_klass(_class_klass); } | |
242 static klassOop cloneable_klass() { return check_klass(_cloneable_klass); } | |
243 static klassOop classloader_klass() { return check_klass(_classloader_klass); } | |
244 static klassOop serializable_klass() { return check_klass(_serializable_klass); } | |
245 static klassOop system_klass() { return check_klass(_system_klass); } | |
246 | |
247 static klassOop throwable_klass() { return check_klass(_throwable_klass); } | |
248 static klassOop error_klass() { return check_klass(_error_klass); } | |
249 static klassOop threaddeath_klass() { return check_klass(_threaddeath_klass); } | |
250 static klassOop exception_klass() { return check_klass(_exception_klass); } | |
251 static klassOop runtime_exception_klass() { return check_klass(_runtime_exception_klass); } | |
252 static klassOop classNotFoundException_klass() { return check_klass(_classNotFoundException_klass); } | |
253 static klassOop noClassDefFoundError_klass() { return check_klass(_noClassDefFoundError_klass); } | |
254 static klassOop linkageError_klass() { return check_klass(_linkageError_klass); } | |
255 static klassOop ClassCastException_klass() { return check_klass(_classCastException_klass); } | |
256 static klassOop ArrayStoreException_klass() { return check_klass(_arrayStoreException_klass); } | |
257 static klassOop virtualMachineError_klass() { return check_klass(_virtualMachineError_klass); } | |
258 static klassOop OutOfMemoryError_klass() { return check_klass(_outOfMemoryError_klass); } | |
259 static klassOop StackOverflowError_klass() { return check_klass(_StackOverflowError_klass); } | |
260 static klassOop IllegalMonitorStateException_klass() { return check_klass(_illegalMonitorStateException_klass); } | |
261 static klassOop protectionDomain_klass() { return check_klass(_protectionDomain_klass); } | |
262 static klassOop AccessControlContext_klass() { return check_klass(_AccessControlContext_klass); } | |
263 static klassOop reference_klass() { return check_klass(_reference_klass); } | |
264 static klassOop soft_reference_klass() { return check_klass(_soft_reference_klass); } | |
265 static klassOop weak_reference_klass() { return check_klass(_weak_reference_klass); } | |
266 static klassOop final_reference_klass() { return check_klass(_final_reference_klass); } | |
267 static klassOop phantom_reference_klass() { return check_klass(_phantom_reference_klass); } | |
268 static klassOop finalizer_klass() { return check_klass(_finalizer_klass); } | |
269 | |
270 static klassOop thread_klass() { return check_klass(_thread_klass); } | |
271 static klassOop threadGroup_klass() { return check_klass(_threadGroup_klass); } | |
272 static klassOop properties_klass() { return check_klass(_properties_klass); } | |
273 static klassOop reflect_accessible_object_klass() { return check_klass(_reflect_accessible_object_klass); } | |
274 static klassOop reflect_field_klass() { return check_klass(_reflect_field_klass); } | |
275 static klassOop reflect_method_klass() { return check_klass(_reflect_method_klass); } | |
276 static klassOop reflect_constructor_klass() { return check_klass(_reflect_constructor_klass); } | |
277 static klassOop reflect_method_accessor_klass() { | |
278 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); | |
279 return check_klass(_reflect_method_accessor_klass); | |
280 } | |
281 static klassOop reflect_constructor_accessor_klass() { | |
282 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); | |
283 return check_klass(_reflect_constructor_accessor_klass); | |
284 } | |
285 // NOTE: needed too early in bootstrapping process to have checks based on JDK version | |
286 static klassOop reflect_magic_klass() { return _reflect_magic_klass; } | |
287 static klassOop reflect_delegating_classloader_klass() { return _reflect_delegating_classloader_klass; } | |
288 static klassOop reflect_constant_pool_klass() { | |
289 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); | |
290 return _reflect_constant_pool_klass; | |
291 } | |
292 static klassOop reflect_unsafe_static_field_accessor_impl_klass() { | |
293 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); | |
294 return _reflect_unsafe_static_field_accessor_impl_klass; | |
295 } | |
296 | |
297 static klassOop vector_klass() { return check_klass(_vector_klass); } | |
298 static klassOop hashtable_klass() { return check_klass(_hashtable_klass); } | |
299 static klassOop stringBuffer_klass() { return check_klass(_stringBuffer_klass); } | |
300 static klassOop stackTraceElement_klass() { return check_klass(_stackTraceElement_klass); } | |
301 | |
302 static klassOop java_nio_Buffer_klass() { return check_klass(_java_nio_Buffer_klass); } | |
303 | |
304 static klassOop sun_misc_AtomicLongCSImpl_klass() { return _sun_misc_AtomicLongCSImpl_klass; } | |
305 | |
306 // To support incremental JRE downloads (KERNEL JRE). Null if not present. | |
307 static klassOop sun_jkernel_DownloadManager_klass() { return _sun_jkernel_DownloadManager_klass; } | |
308 | |
309 static klassOop boolean_klass() { return check_klass(_boolean_klass); } | |
310 static klassOop char_klass() { return check_klass(_char_klass); } | |
311 static klassOop float_klass() { return check_klass(_float_klass); } | |
312 static klassOop double_klass() { return check_klass(_double_klass); } | |
313 static klassOop byte_klass() { return check_klass(_byte_klass); } | |
314 static klassOop short_klass() { return check_klass(_short_klass); } | |
315 static klassOop int_klass() { return check_klass(_int_klass); } | |
316 static klassOop long_klass() { return check_klass(_long_klass); } | |
317 | |
318 static klassOop box_klass(BasicType t) { | |
319 assert((uint)t < T_VOID+1, "range check"); | |
320 return check_klass(_box_klasses[t]); | |
321 } | |
322 static BasicType box_klass_type(klassOop k); // inverse of box_klass | |
323 | |
324 // methods returning lazily loaded klasses | |
325 // The corresponding method to load the class must be called before calling them. | |
326 static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } | |
327 | |
328 static void load_abstract_ownable_synchronizer_klass(TRAPS); | |
329 | |
330 private: | |
331 // Tells whether ClassLoader.loadClassInternal is present | |
332 static bool has_loadClassInternal() { return _has_loadClassInternal; } | |
333 | |
334 public: | |
335 // Tells whether ClassLoader.checkPackageAccess is present | |
336 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } | |
337 | |
338 static bool class_klass_loaded() { return _class_klass != NULL; } | |
339 static bool cloneable_klass_loaded() { return _cloneable_klass != NULL; } | |
340 | |
341 // Returns default system loader | |
342 static oop java_system_loader(); | |
343 | |
344 // Compute the default system loader | |
345 static void compute_java_system_loader(TRAPS); | |
346 | |
347 private: | |
348 // Mirrors for primitive classes (created eagerly) | |
349 static oop check_mirror(oop m) { | |
350 assert(m != NULL, "mirror not initialized"); | |
351 return m; | |
352 } | |
353 | |
354 public: | |
355 // Note: java_lang_Class::primitive_type is the inverse of java_mirror | |
356 | |
357 // Check class loader constraints | |
358 static bool add_loader_constraint(symbolHandle name, Handle loader1, | |
359 Handle loader2, TRAPS); | |
360 static char* check_signature_loaders(symbolHandle signature, Handle loader1, | |
361 Handle loader2, bool is_method, TRAPS); | |
362 | |
363 // Utility for printing loader "name" as part of tracing constraints | |
364 static const char* loader_name(oop loader) { | |
365 return ((loader) == NULL ? "<bootloader>" : | |
366 instanceKlass::cast((loader)->klass())->name()->as_C_string() ); | |
367 } | |
368 | |
369 // Record the error when the first attempt to resolve a reference from a constant | |
370 // pool entry to a class fails. | |
371 static void add_resolution_error(constantPoolHandle pool, int which, symbolHandle error); | |
372 static symbolOop find_resolution_error(constantPoolHandle pool, int which); | |
373 | |
374 private: | |
375 | |
376 enum Constants { | |
377 _loader_constraint_size = 107, // number of entries in constraint table | |
378 _resolution_error_size = 107, // number of entries in resolution error table | |
379 _nof_buckets = 1009 // number of buckets in hash table | |
380 }; | |
381 | |
382 | |
383 // Static variables | |
384 | |
385 // Hashtable holding loaded classes. | |
386 static Dictionary* _dictionary; | |
387 | |
388 // Hashtable holding placeholders for classes being loaded. | |
389 static PlaceholderTable* _placeholders; | |
390 | |
391 // Hashtable holding classes from the shared archive. | |
392 static Dictionary* _shared_dictionary; | |
393 | |
394 // Monotonically increasing counter which grows with | |
395 // _number_of_classes as well as hot-swapping and breakpoint setting | |
396 // and removal. | |
397 static int _number_of_modifications; | |
398 | |
399 // Lock object for system class loader | |
400 static oop _system_loader_lock_obj; | |
401 | |
402 // Constraints on class loaders | |
403 static LoaderConstraintTable* _loader_constraints; | |
404 | |
405 // Resolution errors | |
406 static ResolutionErrorTable* _resolution_errors; | |
407 | |
408 public: | |
409 // for VM_CounterDecay iteration support | |
410 friend class CounterDecay; | |
411 static klassOop try_get_next_class(); | |
412 | |
413 private: | |
414 static void validate_protection_domain(instanceKlassHandle klass, | |
415 Handle class_loader, | |
416 Handle protection_domain, TRAPS); | |
417 | |
418 friend class VM_PopulateDumpSharedSpace; | |
419 friend class TraversePlaceholdersClosure; | |
420 static Dictionary* dictionary() { return _dictionary; } | |
421 static Dictionary* shared_dictionary() { return _shared_dictionary; } | |
422 static PlaceholderTable* placeholders() { return _placeholders; } | |
423 static LoaderConstraintTable* constraints() { return _loader_constraints; } | |
424 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } | |
425 | |
426 // Basic loading operations | |
427 static klassOop resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); | |
428 static klassOop resolve_array_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS); | |
429 static instanceKlassHandle handle_parallel_super_load(symbolHandle class_name, symbolHandle supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); | |
430 // Wait on SystemDictionary_lock; unlocks lockObject before | |
431 // waiting; relocks lockObject with correct recursion count | |
432 // after waiting, but before reentering SystemDictionary_lock | |
433 // to preserve lock order semantics. | |
434 static void double_lock_wait(Handle lockObject, TRAPS); | |
435 static void define_instance_class(instanceKlassHandle k, TRAPS); | |
436 static instanceKlassHandle find_or_define_instance_class(symbolHandle class_name, | |
437 Handle class_loader, | |
438 instanceKlassHandle k, TRAPS); | |
439 static instanceKlassHandle load_shared_class(symbolHandle class_name, | |
440 Handle class_loader, TRAPS); | |
441 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, | |
442 Handle class_loader, TRAPS); | |
443 static instanceKlassHandle load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS); | |
444 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); | |
445 static void check_loader_lock_contention(Handle loader_lock, TRAPS); | |
446 | |
447 static klassOop find_shared_class(symbolHandle class_name); | |
448 | |
449 // Setup link to hierarchy | |
450 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); | |
451 | |
452 private: | |
453 // We pass in the hashtable index so we can calculate it outside of | |
454 // the SystemDictionary_lock. | |
455 | |
456 // Basic find on loaded classes | |
457 static klassOop find_class(int index, unsigned int hash, | |
458 symbolHandle name, Handle loader); | |
459 | |
460 // Basic find on classes in the midst of being loaded | |
461 static symbolOop find_placeholder(int index, unsigned int hash, | |
462 symbolHandle name, Handle loader); | |
463 | |
464 // Basic find operation of loaded classes and classes in the midst | |
465 // of loading; used for assertions and verification only. | |
466 static oop find_class_or_placeholder(symbolHandle class_name, | |
467 Handle class_loader); | |
468 | |
469 // Updating entry in dictionary | |
470 // Add a completely loaded class | |
471 static void add_klass(int index, symbolHandle class_name, | |
472 Handle class_loader, KlassHandle obj); | |
473 | |
474 // Add a placeholder for a class being loaded | |
475 static void add_placeholder(int index, | |
476 symbolHandle class_name, | |
477 Handle class_loader); | |
478 static void remove_placeholder(int index, | |
479 symbolHandle class_name, | |
480 Handle class_loader); | |
481 | |
482 // Performs cleanups after resolve_super_or_fail. This typically needs | |
483 // to be called on failure. | |
484 // Won't throw, but can block. | |
485 static void resolution_cleanups(symbolHandle class_name, | |
486 Handle class_loader, | |
487 TRAPS); | |
488 | |
489 // Initialization | |
490 static void initialize_preloaded_classes(TRAPS); | |
491 | |
492 // Class loader constraints | |
493 static void check_constraints(int index, unsigned int hash, | |
494 instanceKlassHandle k, Handle loader, | |
495 bool defining, TRAPS); | |
496 static void update_dictionary(int d_index, unsigned int d_hash, | |
497 int p_index, unsigned int p_hash, | |
498 instanceKlassHandle k, Handle loader, TRAPS); | |
499 | |
500 // Variables holding commonly used klasses (preloaded) | |
501 static klassOop _object_klass; | |
502 static klassOop _string_klass; | |
503 static klassOop _class_klass; | |
504 static klassOop _cloneable_klass; | |
505 static klassOop _classloader_klass; | |
506 static klassOop _serializable_klass; | |
507 static klassOop _system_klass; | |
508 | |
509 static klassOop _throwable_klass; | |
510 static klassOop _error_klass; | |
511 static klassOop _threaddeath_klass; | |
512 static klassOop _exception_klass; | |
513 static klassOop _runtime_exception_klass; | |
514 static klassOop _classNotFoundException_klass; | |
515 static klassOop _noClassDefFoundError_klass; | |
516 static klassOop _linkageError_klass; | |
517 static klassOop _classCastException_klass; | |
518 static klassOop _arrayStoreException_klass; | |
519 static klassOop _virtualMachineError_klass; | |
520 static klassOop _outOfMemoryError_klass; | |
521 static klassOop _StackOverflowError_klass; | |
522 static klassOop _illegalMonitorStateException_klass; | |
523 static klassOop _protectionDomain_klass; | |
524 static klassOop _AccessControlContext_klass; | |
525 static klassOop _reference_klass; | |
526 static klassOop _soft_reference_klass; | |
527 static klassOop _weak_reference_klass; | |
528 static klassOop _final_reference_klass; | |
529 static klassOop _phantom_reference_klass; | |
530 static klassOop _finalizer_klass; | |
531 | |
532 static klassOop _thread_klass; | |
533 static klassOop _threadGroup_klass; | |
534 static klassOop _properties_klass; | |
535 static klassOop _reflect_accessible_object_klass; | |
536 static klassOop _reflect_field_klass; | |
537 static klassOop _reflect_method_klass; | |
538 static klassOop _reflect_constructor_klass; | |
539 // 1.4 reflection implementation | |
540 static klassOop _reflect_magic_klass; | |
541 static klassOop _reflect_method_accessor_klass; | |
542 static klassOop _reflect_constructor_accessor_klass; | |
543 static klassOop _reflect_delegating_classloader_klass; | |
544 // 1.5 annotations implementation | |
545 static klassOop _reflect_constant_pool_klass; | |
546 static klassOop _reflect_unsafe_static_field_accessor_impl_klass; | |
547 | |
548 static klassOop _stringBuffer_klass; | |
549 static klassOop _vector_klass; | |
550 static klassOop _hashtable_klass; | |
551 | |
552 static klassOop _stackTraceElement_klass; | |
553 | |
554 static klassOop _java_nio_Buffer_klass; | |
555 | |
556 static klassOop _sun_misc_AtomicLongCSImpl_klass; | |
557 | |
558 // KERNEL JRE support. | |
559 static klassOop _sun_jkernel_DownloadManager_klass; | |
560 | |
561 // Lazily loaded klasses | |
562 static volatile klassOop _abstract_ownable_synchronizer_klass; | |
563 | |
564 // Box klasses | |
565 static klassOop _boolean_klass; | |
566 static klassOop _char_klass; | |
567 static klassOop _float_klass; | |
568 static klassOop _double_klass; | |
569 static klassOop _byte_klass; | |
570 static klassOop _short_klass; | |
571 static klassOop _int_klass; | |
572 static klassOop _long_klass; | |
573 | |
574 // table of same | |
575 static klassOop _box_klasses[T_VOID+1]; | |
576 | |
577 static oop _java_system_loader; | |
578 | |
579 static bool _has_loadClassInternal; | |
580 static bool _has_checkPackageAccess; | |
581 }; |