1 #ifdef USE_PRAGMA_IDENT_SRC
2 #pragma ident "@(#)ciObjectFactory.cpp 1.39 07/05/17 15:50:05 JVM"
3 #endif
4 /*
5 * Copyright 1999-2007 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 #include "incls/_precompiled.incl"
29 #include "incls/_ciObjectFactory.cpp.incl"
30
31 // ciObjectFactory
32 //
33 // This class handles requests for the creation of new instances
34 // of ciObject and its subclasses. It contains a caching mechanism
35 // which ensures that for each oop, at most one ciObject is created.
36 // This invariant allows more efficient implementation of ciObject.
37 //
38 // Implementation note: the oop->ciObject mapping is represented as
39 // a table stored in an array. Even though objects are moved
40 // by the garbage collector, the compactor preserves their relative
41 // order; address comparison of oops (in perm space) is safe so long
42 // as we prohibit GC during our comparisons. We currently use binary
43 // search to find the oop in the table, and inserting a new oop
44 // into the table may be costly. If this cost ends up being
45 // problematic the underlying data structure can be switched to some
46 // sort of balanced binary tree.
47
48 GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL;
49 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT];
50 int ciObjectFactory::_shared_ident_limit = 0;
51 volatile bool ciObjectFactory::_initialized = false;
52
53
54 // ------------------------------------------------------------------
55 // ciObjectFactory::ciObjectFactory
56 ciObjectFactory::ciObjectFactory(Arena* arena,
57 int expected_size) {
58
59 for (int i = 0; i < NON_PERM_BUCKETS; i++) {
60 _non_perm_bucket[i] = NULL;
61 }
62 _non_perm_count = 0;
63
64 _next_ident = _shared_ident_limit;
65 _arena = arena;
66 _ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL);
67
68 // If the shared ci objects exist append them to this factory's objects
69
70 if (_shared_ci_objects != NULL) {
71 _ci_objects->appendAll(_shared_ci_objects);
72 }
73
74 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL);
75 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL);
76 _return_addresses =
77 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL);
78 }
79
80 // ------------------------------------------------------------------
81 // ciObjectFactory::ciObjectFactory
82 void ciObjectFactory::initialize() {
83 ASSERT_IN_VM;
84 JavaThread* thread = JavaThread::current();
85 HandleMark handle_mark(thread);
86
87 // This Arena is long lived and exists in the resource mark of the
88 // compiler thread that initializes the initial ciObjectFactory which
89 // creates the shared ciObjects that all later ciObjectFactories use.
90 Arena* arena = new Arena();
91 ciEnv initial(arena);
92 ciEnv* env = ciEnv::current();
93 env->_factory->init_shared_objects();
94
95 _initialized = true;
96
97 }
98
99 void ciObjectFactory::init_shared_objects() {
100
101 _next_ident = 1; // start numbering CI objects at 1
102
103 {
104 // Create the shared symbols, but not in _shared_ci_objects.
105 int i;
106 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
107 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i);
108 assert(vmSymbols::find_sid(sym_handle()) == i, "1-1 mapping");
109 ciSymbol* sym = new (_arena) ciSymbol(sym_handle);
110 init_ident_of(sym);
111 _shared_ci_symbols[i] = sym;
112 }
113 #ifdef ASSERT
114 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
115 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i);
116 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i);
117 assert(sym->get_oop() == sym_handle(), "oop must match");
118 }
119 assert(ciSymbol::void_class_signature()->get_oop() == vmSymbols::void_class_signature(), "spot check");
120 #endif
121 }
122
123 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL);
124
125 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
126 BasicType t = (BasicType)i;
127 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY) {
128 ciType::_basic_types[t] = new (_arena) ciType(t);
129 init_ident_of(ciType::_basic_types[t]);
130 }
131 }
132
133 ciEnv::_null_object_instance = new (_arena) ciNullObject();
134 init_ident_of(ciEnv::_null_object_instance);
135 ciEnv::_method_klass_instance =
136 get(Universe::methodKlassObj())->as_method_klass();
137 ciEnv::_symbol_klass_instance =
138 get(Universe::symbolKlassObj())->as_symbol_klass();
139 ciEnv::_klass_klass_instance =
140 get(Universe::klassKlassObj())->as_klass_klass();
141 ciEnv::_instance_klass_klass_instance =
142 get(Universe::instanceKlassKlassObj())
143 ->as_instance_klass_klass();
144 ciEnv::_type_array_klass_klass_instance =
145 get(Universe::typeArrayKlassKlassObj())
146 ->as_type_array_klass_klass();
147 ciEnv::_obj_array_klass_klass_instance =
148 get(Universe::objArrayKlassKlassObj())
149 ->as_obj_array_klass_klass();
150 ciEnv::_ArrayStoreException =
151 get(SystemDictionary::ArrayStoreException_klass())
152 ->as_instance_klass();
153 ciEnv::_Class =
154 get(SystemDictionary::class_klass())
155 ->as_instance_klass();
156 ciEnv::_ClassCastException =
157 get(SystemDictionary::ClassCastException_klass())
158 ->as_instance_klass();
159 ciEnv::_Object =
160 get(SystemDictionary::object_klass())
161 ->as_instance_klass();
162 ciEnv::_Throwable =
163 get(SystemDictionary::throwable_klass())
164 ->as_instance_klass();
165 ciEnv::_Thread =
166 get(SystemDictionary::thread_klass())
167 ->as_instance_klass();
168 ciEnv::_OutOfMemoryError =
169 get(SystemDictionary::OutOfMemoryError_klass())
170 ->as_instance_klass();
171 ciEnv::_String =
172 get(SystemDictionary::string_klass())
173 ->as_instance_klass();
174
175 for (int len = -1; len != _ci_objects->length(); ) {
176 len = _ci_objects->length();
177 for (int i2 = 0; i2 < len; i2++) {
178 ciObject* obj = _ci_objects->at(i2);
179 if (obj->is_loaded() && obj->is_instance_klass()) {
180 obj->as_instance_klass()->compute_nonstatic_fields();
181 }
182 }
183 }
184
185 ciEnv::_unloaded_cisymbol = (ciSymbol*) ciObjectFactory::get(vmSymbols::dummy_symbol_oop());
186 // Create dummy instanceKlass and objArrayKlass object and assign them idents
187 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL);
188 init_ident_of(ciEnv::_unloaded_ciinstance_klass);
189 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1);
190 init_ident_of(ciEnv::_unloaded_ciobjarrayklass);
191 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking");
192
193 get(Universe::boolArrayKlassObj());
194 get(Universe::charArrayKlassObj());
195 get(Universe::singleArrayKlassObj());
196 get(Universe::doubleArrayKlassObj());
197 get(Universe::byteArrayKlassObj());
198 get(Universe::shortArrayKlassObj());
199 get(Universe::intArrayKlassObj());
200 get(Universe::longArrayKlassObj());
201
202
203
204 assert(_non_perm_count == 0, "no shared non-perm objects");
205
206 // The shared_ident_limit is the first ident number that will
207 // be used for non-shared objects. That is, numbers less than
208 // this limit are permanently assigned to shared CI objects,
209 // while the higher numbers are recycled afresh by each new ciEnv.
210
211 _shared_ident_limit = _next_ident;
212 _shared_ci_objects = _ci_objects;
213 }
214
215 // ------------------------------------------------------------------
216 // ciObjectFactory::get
217 //
218 // Get the ciObject corresponding to some oop. If the ciObject has
219 // already been created, it is returned. Otherwise, a new ciObject
220 // is created.
221 ciObject* ciObjectFactory::get(oop key) {
222 ASSERT_IN_VM;
223
224 #ifdef ASSERT
225 oop last = NULL;
226 for (int j = 0; j< _ci_objects->length(); j++) {
227 oop o = _ci_objects->at(j)->get_oop();
228 assert(last < o, "out of order");
229 last = o;
230 }
231 #endif // ASSERT
232 int len = _ci_objects->length();
233 int index = find(key, _ci_objects);
234 #ifdef ASSERT
235 for (int i=0; i<_ci_objects->length(); i++) {
236 if (_ci_objects->at(i)->get_oop() == key) {
237 assert(index == i, " bad lookup");
238 }
239 }
240 #endif
241 if (!is_found_at(index, key, _ci_objects)) {
242
243 // Check in the non-perm area before putting it in the list.
244 NonPermObject* &bucket = find_non_perm(key);
245 if (bucket != NULL) {
246 return bucket->object();
247 }
248
249 // Check in the shared symbol area before putting it in the list.
250 if (key->is_symbol()) {
251 vmSymbols::SID sid = vmSymbols::find_sid((symbolOop)key);
252 if (sid != vmSymbols::NO_SID) {
253 // do not pollute the main cache with it
254 return vm_symbol_at(sid);
255 }
256 }
257
258 // The ciObject does not yet exist. Create it and insert it
259 // into the cache.
260 Handle keyHandle(key);
261 ciObject* new_object = create_new_object(keyHandle());
262 assert(keyHandle() == new_object->get_oop(), "must be properly recorded");
263 init_ident_of(new_object);
264 if (!keyHandle->is_perm()) {
265 // Not a perm-space object.
266 insert_non_perm(bucket, keyHandle(), new_object);
267 return new_object;
268 }
269 new_object->set_perm();
270 if (len != _ci_objects->length()) {
271 // creating the new object has recursively entered new objects
272 // into the table. We need to recompute our index.
273 index = find(keyHandle(), _ci_objects);
274 }
275 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert");
276 insert(index, new_object, _ci_objects);
277 return new_object;
278 }
279 return _ci_objects->at(index);
280 }
281
282 // ------------------------------------------------------------------
283 // ciObjectFactory::create_new_object
284 //
285 // Create a new ciObject from an oop.
286 //
287 // Implementation note: this functionality could be virtual behavior
288 // of the oop itself. For now, we explicitly marshal the object.
289 ciObject* ciObjectFactory::create_new_object(oop o) {
290 EXCEPTION_CONTEXT;
291
292 if (o->is_symbol()) {
293 symbolHandle h_o(THREAD, (symbolOop)o);
294 return new (arena()) ciSymbol(h_o);
295 } else if (o->is_klass()) {
296 KlassHandle h_k(THREAD, (klassOop)o);
297 Klass* k = ((klassOop)o)->klass_part();
298 if (k->oop_is_instance()) {
299 return new (arena()) ciInstanceKlass(h_k);
300 } else if (k->oop_is_objArray()) {
301 return new (arena()) ciObjArrayKlass(h_k);
302 } else if (k->oop_is_typeArray()) {
303 return new (arena()) ciTypeArrayKlass(h_k);
304 } else if (k->oop_is_method()) {
305 return new (arena()) ciMethodKlass(h_k);
306 } else if (k->oop_is_symbol()) {
307 return new (arena()) ciSymbolKlass(h_k);
308 } else if (k->oop_is_klass()) {
309 if (k->oop_is_objArrayKlass()) {
310 return new (arena()) ciObjArrayKlassKlass(h_k);
311 } else if (k->oop_is_typeArrayKlass()) {
312 return new (arena()) ciTypeArrayKlassKlass(h_k);
313 } else if (k->oop_is_instanceKlass()) {
314 return new (arena()) ciInstanceKlassKlass(h_k);
315 } else {
316 assert(o == Universe::klassKlassObj(), "bad klassKlass");
317 return new (arena()) ciKlassKlass(h_k);
318 }
319 }
320 } else if (o->is_method()) {
321 methodHandle h_m(THREAD, (methodOop)o);
322 return new (arena()) ciMethod(h_m);
323 } else if (o->is_methodData()) {
324 methodDataHandle h_md(THREAD, (methodDataOop)o);
325 return new (arena()) ciMethodData(h_md);
326 } else if (o->is_instance()) {
327 instanceHandle h_i(THREAD, (instanceOop)o);
328 return new (arena()) ciInstance(h_i);
329 } else if (o->is_objArray()) {
330 objArrayHandle h_oa(THREAD, (objArrayOop)o);
331 return new (arena()) ciObjArray(h_oa);
332 } else if (o->is_typeArray()) {
333 typeArrayHandle h_ta(THREAD, (typeArrayOop)o);
334 return new (arena()) ciTypeArray(h_ta);
335 }
336
337 // The oop is of some type not supported by the compiler interface.
338 ShouldNotReachHere();
339 return NULL;
340 }
341
342 //------------------------------------------------------------------
343 // ciObjectFactory::get_unloaded_method
344 //
345 // Get the ciMethod representing an unloaded/unfound method.
346 //
347 // Implementation note: unloaded methods are currently stored in
348 // an unordered array, requiring a linear-time lookup for each
349 // unloaded method. This may need to change.
350 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder,
351 ciSymbol* name,
352 ciSymbol* signature) {
353 for (int i=0; i<_unloaded_methods->length(); i++) {
354 ciMethod* entry = _unloaded_methods->at(i);
355 if (entry->holder()->equals(holder) &&
356 entry->name()->equals(name) &&
357 entry->signature()->as_symbol()->equals(signature)) {
358 // We've found a match.
359 return entry;
360 }
361 }
362
363 // This is a new unloaded method. Create it and stick it in
364 // the cache.
365 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature);
366
367 init_ident_of(new_method);
368 _unloaded_methods->append(new_method);
369
370 return new_method;
371 }
372
373 //------------------------------------------------------------------
374 // ciObjectFactory::get_unloaded_klass
375 //
376 // Get a ciKlass representing an unloaded klass.
377 //
378 // Implementation note: unloaded klasses are currently stored in
379 // an unordered array, requiring a linear-time lookup for each
380 // unloaded klass. This may need to change.
381 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass,
382 ciSymbol* name,
383 bool create_if_not_found) {
384 EXCEPTION_CONTEXT;
385 oop loader = NULL;
386 oop domain = NULL;
387 if (accessing_klass != NULL) {
388 loader = accessing_klass->loader();
389 domain = accessing_klass->protection_domain();
390 }
391 for (int i=0; i<_unloaded_klasses->length(); i++) {
392 ciKlass* entry = _unloaded_klasses->at(i);
393 if (entry->name()->equals(name) &&
394 entry->loader() == loader &&
395 entry->protection_domain() == domain) {
396 // We've found a match.
397 return entry;
398 }
399 }
400
401 if (!create_if_not_found)
402 return NULL;
403
404 // This is a new unloaded klass. Create it and stick it in
405 // the cache.
406 ciKlass* new_klass = NULL;
407
408 // Two cases: this is an unloaded objArrayKlass or an
409 // unloaded instanceKlass. Deal with both.
410 if (name->byte_at(0) == '[') {
411 // Decompose the name.'
412 jint dimension = 0;
413 symbolOop element_name = NULL;
414 BasicType element_type= FieldType::get_array_info(name->get_symbolOop(),
415 &dimension,
416 &element_name,
417 THREAD);
418 if (HAS_PENDING_EXCEPTION) {
419 CLEAR_PENDING_EXCEPTION;
420 CURRENT_THREAD_ENV->record_out_of_memory_failure();
421 return ciEnv::_unloaded_ciobjarrayklass;
422 }
423 assert(element_type != T_ARRAY, "unsuccessful decomposition");
424 ciKlass* element_klass = NULL;
425 if (element_type == T_OBJECT) {
426 ciEnv *env = CURRENT_THREAD_ENV;
427 ciSymbol* ci_name = env->get_object(element_name)->as_symbol();
428 element_klass =
429 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass();
430 } else {
431 assert(dimension > 1, "one dimensional type arrays are always loaded.");
432
433 // The type array itself takes care of one of the dimensions.
434 dimension--;
435
436 // The element klass is a typeArrayKlass.
437 element_klass = ciTypeArrayKlass::make(element_type);
438 }
439 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension);
440 } else {
441 jobject loader_handle = NULL;
442 jobject domain_handle = NULL;
443 if (accessing_klass != NULL) {
444 loader_handle = accessing_klass->loader_handle();
445 domain_handle = accessing_klass->protection_domain_handle();
446 }
447 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle);
448 }
449 init_ident_of(new_klass);
450 _unloaded_klasses->append(new_klass);
451
452 return new_klass;
453 }
454
455 //------------------------------------------------------------------
456 // ciObjectFactory::get_empty_methodData
457 //
458 // Get the ciMethodData representing the methodData for a method with
459 // none.
460 ciMethodData* ciObjectFactory::get_empty_methodData() {
461 ciMethodData* new_methodData = new (arena()) ciMethodData();
462 init_ident_of(new_methodData);
463 return new_methodData;
464 }
465
466 //------------------------------------------------------------------
467 // ciObjectFactory::get_return_address
468 //
469 // Get a ciReturnAddress for a specified bci.
470 ciReturnAddress* ciObjectFactory::get_return_address(int bci) {
471 for (int i=0; i<_return_addresses->length(); i++) {
472 ciReturnAddress* entry = _return_addresses->at(i);
473 if (entry->bci() == bci) {
474 // We've found a match.
475 return entry;
476 }
477 }
478
479 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci);
480 init_ident_of(new_ret_addr);
481 _return_addresses->append(new_ret_addr);
482 return new_ret_addr;
483 }
484
485 // ------------------------------------------------------------------
486 // ciObjectFactory::init_ident_of
487 void ciObjectFactory::init_ident_of(ciObject* obj) {
488 obj->set_ident(_next_ident++);
489 }
490
491
492 // ------------------------------------------------------------------
493 // ciObjectFactory::find
494 //
495 // Use binary search to find the position of this oop in the cache.
496 // If there is no entry in the cache corresponding to this oop, return
497 // the position at which the oop should be inserted.
498 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) {
499 int min = 0;
500 int max = objects->length()-1;
501
502 // print_contents();
503
504 while (max >= min) {
505 int mid = (max + min) / 2;
506 oop value = objects->at(mid)->get_oop();
507 if (value < key) {
508 min = mid + 1;
509 } else if (value > key) {
510 max = mid - 1;
511 } else {
512 return mid;
513 }
514 }
515 return min;
516 }
517
518 // ------------------------------------------------------------------
519 // ciObjectFactory::is_found_at
520 //
521 // Verify that the binary seach found the given key.
522 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) {
523 return (index < objects->length() &&
524 objects->at(index)->get_oop() == key);
525 }
526
527
528 // ------------------------------------------------------------------
529 // ciObjectFactory::insert
530 //
531 // Insert a ciObject into the table at some index.
532 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) {
533 int len = objects->length();
534 if (len == index) {
535 objects->append(obj);
536 } else {
537 objects->append(objects->at(len-1));
538 int pos;
539 for (pos = len-2; pos >= index; pos--) {
540 objects->at_put(pos+1,objects->at(pos));
541 }
542 objects->at_put(index, obj);
543 }
544 #ifdef ASSERT
545 oop last = NULL;
546 for (int j = 0; j< objects->length(); j++) {
547 oop o = objects->at(j)->get_oop();
548 assert(last < o, "out of order");
549 last = o;
550 }
551 #endif // ASSERT
552 }
553
554 static ciObjectFactory::NonPermObject* emptyBucket = NULL;
555
556 // ------------------------------------------------------------------
557 // ciObjectFactory::find_non_perm
558 //
559 // Use a small hash table, hashed on the klass of the key.
560 // If there is no entry in the cache corresponding to this oop, return
561 // the null tail of the bucket into which the oop should be inserted.
562 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) {
563 // Be careful: is_perm might change from false to true.
564 // Thus, there might be a matching perm object in the table.
565 // If there is, this probe must find it.
566 if (key->is_perm() && _non_perm_count == 0) {
567 return emptyBucket;
568 } else if (key->is_instance()) {
569 if (key->klass() == SystemDictionary::class_klass()) {
570 // class mirror instances are always perm
571 return emptyBucket;
572 }
573 // fall through to probe
574 } else if (key->is_array()) {
575 // fall through to probe
576 } else {
577 // not an array or instance
578 return emptyBucket;
579 }
580
581 ciObject* klass = get(key->klass());
582 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS];
583 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) {
584 if (is_equal(p, key)) break;
585 }
586 return (*bp);
587 }
588
589
590
591 // ------------------------------------------------------------------
592 // Code for for NonPermObject
593 //
594 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) {
595 assert(ciObjectFactory::is_initialized(), "");
596 _object = object;
597 _next = bucket;
598 bucket = this;
599 }
600
601
602
603 // ------------------------------------------------------------------
604 // ciObjectFactory::insert_non_perm
605 //
606 // Insert a ciObject into the non-perm table.
607 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) {
608 assert(&where != &emptyBucket, "must not try to fill empty bucket");
609 NonPermObject* p = new (arena()) NonPermObject(where, key, obj);
610 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match");
611 assert(find_non_perm(key) == p, "must find the same spot");
612 ++_non_perm_count;
613 }
614
615 // ------------------------------------------------------------------
616 // ciObjectFactory::vm_symbol_at
617 // Get the ciSymbol corresponding to some index in vmSymbols.
618 ciSymbol* ciObjectFactory::vm_symbol_at(int index) {
619 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob");
620 return _shared_ci_symbols[index];
621 }
622
623 // ------------------------------------------------------------------
624 // ciObjectFactory::print_contents_impl
625 void ciObjectFactory::print_contents_impl() {
626 int len = _ci_objects->length();
627 tty->print_cr("ciObjectFactory (%d) oop contents:", len);
628 for (int i=0; i<len; i++) {
629 _ci_objects->at(i)->print();
630 tty->cr();
631 }
632 }
633
634 // ------------------------------------------------------------------
635 // ciObjectFactory::print_contents
636 void ciObjectFactory::print_contents() {
637 print();
638 tty->cr();
639 GUARDED_VM_ENTRY(print_contents_impl();)
640 }
641
642 // ------------------------------------------------------------------
643 // ciObjectFactory::print
644 //
645 // Print debugging information about the object factory
646 void ciObjectFactory::print() {
647 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_klasses=%d>",
648 _ci_objects->length(), _unloaded_methods->length(),
649 _unloaded_klasses->length());
650 }
651