1 /*
2 * Copyright 1999-2009 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 #include "incls/_precompiled.incl"
26 #include "incls/_ciObjectFactory.cpp.incl"
27
28 // ciObjectFactory
29 //
30 // This class handles requests for the creation of new instances
31 // of ciObject and its subclasses. It contains a caching mechanism
32 // which ensures that for each oop, at most one ciObject is created.
33 // This invariant allows more efficient implementation of ciObject.
34 //
35 // Implementation note: the oop->ciObject mapping is represented as
36 // a table stored in an array. Even though objects are moved
37 // by the garbage collector, the compactor preserves their relative
38 // order; address comparison of oops (in perm space) is safe so long
39 // as we prohibit GC during our comparisons. We currently use binary
40 // search to find the oop in the table, and inserting a new oop
41 // into the table may be costly. If this cost ends up being
42 // problematic the underlying data structure can be switched to some
43 // sort of balanced binary tree.
44
45 GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL;
46 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT];
47 int ciObjectFactory::_shared_ident_limit = 0;
48 volatile bool ciObjectFactory::_initialized = false;
49
50
51 // ------------------------------------------------------------------
52 // ciObjectFactory::ciObjectFactory
53 ciObjectFactory::ciObjectFactory(Arena* arena,
54 int expected_size) {
55
56 for (int i = 0; i < NON_PERM_BUCKETS; i++) {
57 _non_perm_bucket[i] = NULL;
58 }
59 _non_perm_count = 0;
60
61 _next_ident = _shared_ident_limit;
62 _arena = arena;
63 _ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL);
64
65 // If the shared ci objects exist append them to this factory's objects
66
67 if (_shared_ci_objects != NULL) {
68 _ci_objects->appendAll(_shared_ci_objects);
69 }
70
71 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL);
72 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL);
73 _return_addresses =
74 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL);
75 }
76
77 // ------------------------------------------------------------------
78 // ciObjectFactory::ciObjectFactory
79 void ciObjectFactory::initialize() {
80 ASSERT_IN_VM;
81 JavaThread* thread = JavaThread::current();
82 HandleMark handle_mark(thread);
83
84 // This Arena is long lived and exists in the resource mark of the
85 // compiler thread that initializes the initial ciObjectFactory which
86 // creates the shared ciObjects that all later ciObjectFactories use.
87 Arena* arena = new Arena();
88 ciEnv initial(arena);
89 ciEnv* env = ciEnv::current();
90 env->_factory->init_shared_objects();
91
92 _initialized = true;
93
94 }
95
96 void ciObjectFactory::init_shared_objects() {
97
98 _next_ident = 1; // start numbering CI objects at 1
99
100 {
101 // Create the shared symbols, but not in _shared_ci_objects.
102 int i;
103 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
104 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i);
105 assert(vmSymbols::find_sid(sym_handle()) == i, "1-1 mapping");
106 ciSymbol* sym = new (_arena) ciSymbol(sym_handle);
107 init_ident_of(sym);
108 _shared_ci_symbols[i] = sym;
109 }
110 #ifdef ASSERT
111 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) {
112 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i);
113 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i);
114 assert(sym->get_oop() == sym_handle(), "oop must match");
115 }
116 assert(ciSymbol::void_class_signature()->get_oop() == vmSymbols::void_class_signature(), "spot check");
117 #endif
118 }
119
120 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL);
121
122 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
123 BasicType t = (BasicType)i;
124 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) {
125 ciType::_basic_types[t] = new (_arena) ciType(t);
126 init_ident_of(ciType::_basic_types[t]);
127 }
128 }
129
130 ciEnv::_null_object_instance = new (_arena) ciNullObject();
131 init_ident_of(ciEnv::_null_object_instance);
132 ciEnv::_method_klass_instance =
133 get(Universe::methodKlassObj())->as_method_klass();
134 ciEnv::_symbol_klass_instance =
135 get(Universe::symbolKlassObj())->as_symbol_klass();
136 ciEnv::_klass_klass_instance =
137 get(Universe::klassKlassObj())->as_klass_klass();
138 ciEnv::_instance_klass_klass_instance =
139 get(Universe::instanceKlassKlassObj())
140 ->as_instance_klass_klass();
141 ciEnv::_type_array_klass_klass_instance =
142 get(Universe::typeArrayKlassKlassObj())
143 ->as_type_array_klass_klass();
144 ciEnv::_obj_array_klass_klass_instance =
145 get(Universe::objArrayKlassKlassObj())
146 ->as_obj_array_klass_klass();
147 ciEnv::_ArrayStoreException =
148 get(SystemDictionary::ArrayStoreException_klass())
149 ->as_instance_klass();
150 ciEnv::_Class =
151 get(SystemDictionary::class_klass())
152 ->as_instance_klass();
153 ciEnv::_ClassCastException =
154 get(SystemDictionary::ClassCastException_klass())
155 ->as_instance_klass();
156 ciEnv::_Object =
157 get(SystemDictionary::object_klass())
158 ->as_instance_klass();
159 ciEnv::_Throwable =
160 get(SystemDictionary::throwable_klass())
161 ->as_instance_klass();
162 ciEnv::_Thread =
163 get(SystemDictionary::thread_klass())
164 ->as_instance_klass();
165 ciEnv::_OutOfMemoryError =
166 get(SystemDictionary::OutOfMemoryError_klass())
167 ->as_instance_klass();
168 ciEnv::_String =
169 get(SystemDictionary::string_klass())
170 ->as_instance_klass();
171
172 for (int len = -1; len != _ci_objects->length(); ) {
173 len = _ci_objects->length();
174 for (int i2 = 0; i2 < len; i2++) {
175 ciObject* obj = _ci_objects->at(i2);
176 if (obj->is_loaded() && obj->is_instance_klass()) {
177 obj->as_instance_klass()->compute_nonstatic_fields();
178 }
179 }
180 }
181
182 ciEnv::_unloaded_cisymbol = (ciSymbol*) ciObjectFactory::get(vmSymbols::dummy_symbol_oop());
183 // Create dummy instanceKlass and objArrayKlass object and assign them idents
184 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL);
185 init_ident_of(ciEnv::_unloaded_ciinstance_klass);
186 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1);
187 init_ident_of(ciEnv::_unloaded_ciobjarrayklass);
188 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking");
189
190 get(Universe::boolArrayKlassObj());
191 get(Universe::charArrayKlassObj());
192 get(Universe::singleArrayKlassObj());
193 get(Universe::doubleArrayKlassObj());
194 get(Universe::byteArrayKlassObj());
195 get(Universe::shortArrayKlassObj());
196 get(Universe::intArrayKlassObj());
197 get(Universe::longArrayKlassObj());
198
199
200
201 assert(_non_perm_count == 0, "no shared non-perm objects");
202
203 // The shared_ident_limit is the first ident number that will
204 // be used for non-shared objects. That is, numbers less than
205 // this limit are permanently assigned to shared CI objects,
206 // while the higher numbers are recycled afresh by each new ciEnv.
207
208 _shared_ident_limit = _next_ident;
209 _shared_ci_objects = _ci_objects;
210 }
211
212 // ------------------------------------------------------------------
213 // ciObjectFactory::get
214 //
215 // Get the ciObject corresponding to some oop. If the ciObject has
216 // already been created, it is returned. Otherwise, a new ciObject
217 // is created.
218 ciObject* ciObjectFactory::get(oop key) {
219 ASSERT_IN_VM;
220
221 #ifdef ASSERT
222 if (CIObjectFactoryVerify) {
223 oop last = NULL;
224 for (int j = 0; j< _ci_objects->length(); j++) {
225 oop o = _ci_objects->at(j)->get_oop();
226 assert(last < o, "out of order");
227 last = o;
228 }
229 }
230 #endif // ASSERT
231 int len = _ci_objects->length();
232 int index = find(key, _ci_objects);
233 #ifdef ASSERT
234 if (CIObjectFactoryVerify) {
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 }
241 #endif
242 if (!is_found_at(index, key, _ci_objects)) {
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 (!new_object->is_perm()) {
265 // Not a perm-space object.
266 insert_non_perm(bucket, keyHandle(), new_object);
267 return new_object;
268 }
269 if (len != _ci_objects->length()) {
270 // creating the new object has recursively entered new objects
271 // into the table. We need to recompute our index.
272 index = find(keyHandle(), _ci_objects);
273 }
274 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert");
275 insert(index, new_object, _ci_objects);
276 return new_object;
277 }
278 return _ci_objects->at(index);
279 }
280
281 // ------------------------------------------------------------------
282 // ciObjectFactory::create_new_object
283 //
284 // Create a new ciObject from an oop.
285 //
286 // Implementation note: this functionality could be virtual behavior
287 // of the oop itself. For now, we explicitly marshal the object.
288 ciObject* ciObjectFactory::create_new_object(oop o) {
289 EXCEPTION_CONTEXT;
290
291 if (o->is_symbol()) {
292 symbolHandle h_o(THREAD, (symbolOop)o);
293 return new (arena()) ciSymbol(h_o);
294 } else if (o->is_klass()) {
295 KlassHandle h_k(THREAD, (klassOop)o);
296 Klass* k = ((klassOop)o)->klass_part();
297 if (k->oop_is_instance()) {
298 return new (arena()) ciInstanceKlass(h_k);
299 } else if (k->oop_is_objArray()) {
300 return new (arena()) ciObjArrayKlass(h_k);
301 } else if (k->oop_is_typeArray()) {
302 return new (arena()) ciTypeArrayKlass(h_k);
303 } else if (k->oop_is_method()) {
304 return new (arena()) ciMethodKlass(h_k);
305 } else if (k->oop_is_symbol()) {
306 return new (arena()) ciSymbolKlass(h_k);
307 } else if (k->oop_is_klass()) {
308 if (k->oop_is_objArrayKlass()) {
309 return new (arena()) ciObjArrayKlassKlass(h_k);
310 } else if (k->oop_is_typeArrayKlass()) {
311 return new (arena()) ciTypeArrayKlassKlass(h_k);
312 } else if (k->oop_is_instanceKlass()) {
313 return new (arena()) ciInstanceKlassKlass(h_k);
314 } else {
315 assert(o == Universe::klassKlassObj(), "bad klassKlass");
316 return new (arena()) ciKlassKlass(h_k);
317 }
318 }
319 } else if (o->is_method()) {
320 methodHandle h_m(THREAD, (methodOop)o);
321 return new (arena()) ciMethod(h_m);
322 } else if (o->is_methodData()) {
323 methodDataHandle h_md(THREAD, (methodDataOop)o);
324 return new (arena()) ciMethodData(h_md);
325 } else if (o->is_instance()) {
326 instanceHandle h_i(THREAD, (instanceOop)o);
327 return new (arena()) ciInstance(h_i);
328 } else if (o->is_objArray()) {
329 objArrayHandle h_oa(THREAD, (objArrayOop)o);
330 return new (arena()) ciObjArray(h_oa);
331 } else if (o->is_typeArray()) {
332 typeArrayHandle h_ta(THREAD, (typeArrayOop)o);
333 return new (arena()) ciTypeArray(h_ta);
334 }
335
336 // The oop is of some type not supported by the compiler interface.
337 ShouldNotReachHere();
338 return NULL;
339 }
340
341 //------------------------------------------------------------------
342 // ciObjectFactory::get_unloaded_method
343 //
344 // Get the ciMethod representing an unloaded/unfound method.
345 //
346 // Implementation note: unloaded methods are currently stored in
347 // an unordered array, requiring a linear-time lookup for each
348 // unloaded method. This may need to change.
349 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder,
350 ciSymbol* name,
351 ciSymbol* signature) {
352 for (int i=0; i<_unloaded_methods->length(); i++) {
353 ciMethod* entry = _unloaded_methods->at(i);
354 if (entry->holder()->equals(holder) &&
355 entry->name()->equals(name) &&
356 entry->signature()->as_symbol()->equals(signature)) {
357 // We've found a match.
358 return entry;
359 }
360 }
361
362 // This is a new unloaded method. Create it and stick it in
363 // the cache.
364 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature);
365
366 init_ident_of(new_method);
367 _unloaded_methods->append(new_method);
368
369 return new_method;
370 }
371
372 //------------------------------------------------------------------
373 // ciObjectFactory::get_unloaded_klass
374 //
375 // Get a ciKlass representing an unloaded klass.
376 //
377 // Implementation note: unloaded klasses are currently stored in
378 // an unordered array, requiring a linear-time lookup for each
379 // unloaded klass. This may need to change.
380 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass,
381 ciSymbol* name,
382 bool create_if_not_found) {
383 EXCEPTION_CONTEXT;
384 oop loader = NULL;
385 oop domain = NULL;
386 if (accessing_klass != NULL) {
387 loader = accessing_klass->loader();
388 domain = accessing_klass->protection_domain();
389 }
390 for (int i=0; i<_unloaded_klasses->length(); i++) {
391 ciKlass* entry = _unloaded_klasses->at(i);
392 if (entry->name()->equals(name) &&
393 entry->loader() == loader &&
394 entry->protection_domain() == domain) {
395 // We've found a match.
396 return entry;
397 }
398 }
399
400 if (!create_if_not_found)
401 return NULL;
402
403 // This is a new unloaded klass. Create it and stick it in
404 // the cache.
405 ciKlass* new_klass = NULL;
406
407 // Two cases: this is an unloaded objArrayKlass or an
408 // unloaded instanceKlass. Deal with both.
409 if (name->byte_at(0) == '[') {
410 // Decompose the name.'
411 jint dimension = 0;
412 symbolOop element_name = NULL;
413 BasicType element_type= FieldType::get_array_info(name->get_symbolOop(),
414 &dimension,
415 &element_name,
416 THREAD);
417 if (HAS_PENDING_EXCEPTION) {
418 CLEAR_PENDING_EXCEPTION;
419 CURRENT_THREAD_ENV->record_out_of_memory_failure();
420 return ciEnv::_unloaded_ciobjarrayklass;
421 }
422 assert(element_type != T_ARRAY, "unsuccessful decomposition");
423 ciKlass* element_klass = NULL;
424 if (element_type == T_OBJECT) {
425 ciEnv *env = CURRENT_THREAD_ENV;
426 ciSymbol* ci_name = env->get_object(element_name)->as_symbol();
427 element_klass =
428 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass();
429 } else {
430 assert(dimension > 1, "one dimensional type arrays are always loaded.");
431
432 // The type array itself takes care of one of the dimensions.
433 dimension--;
434
435 // The element klass is a typeArrayKlass.
436 element_klass = ciTypeArrayKlass::make(element_type);
437 }
438 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension);
439 } else {
440 jobject loader_handle = NULL;
441 jobject domain_handle = NULL;
442 if (accessing_klass != NULL) {
443 loader_handle = accessing_klass->loader_handle();
444 domain_handle = accessing_klass->protection_domain_handle();
445 }
446 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle);
447 }
448 init_ident_of(new_klass);
449 _unloaded_klasses->append(new_klass);
450
451 return new_klass;
452 }
453
454 //------------------------------------------------------------------
455 // ciObjectFactory::get_empty_methodData
456 //
457 // Get the ciMethodData representing the methodData for a method with
458 // none.
459 ciMethodData* ciObjectFactory::get_empty_methodData() {
460 ciMethodData* new_methodData = new (arena()) ciMethodData();
461 init_ident_of(new_methodData);
462 return new_methodData;
463 }
464
465 //------------------------------------------------------------------
466 // ciObjectFactory::get_return_address
467 //
468 // Get a ciReturnAddress for a specified bci.
469 ciReturnAddress* ciObjectFactory::get_return_address(int bci) {
470 for (int i=0; i<_return_addresses->length(); i++) {
471 ciReturnAddress* entry = _return_addresses->at(i);
472 if (entry->bci() == bci) {
473 // We've found a match.
474 return entry;
475 }
476 }
477
478 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci);
479 init_ident_of(new_ret_addr);
480 _return_addresses->append(new_ret_addr);
481 return new_ret_addr;
482 }
483
484 // ------------------------------------------------------------------
485 // ciObjectFactory::init_ident_of
486 void ciObjectFactory::init_ident_of(ciObject* obj) {
487 obj->set_ident(_next_ident++);
488 }
489
490
491 // ------------------------------------------------------------------
492 // ciObjectFactory::find
493 //
494 // Use binary search to find the position of this oop in the cache.
495 // If there is no entry in the cache corresponding to this oop, return
496 // the position at which the oop should be inserted.
497 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) {
498 int min = 0;
499 int max = objects->length()-1;
500
501 // print_contents();
502
503 while (max >= min) {
504 int mid = (max + min) / 2;
505 oop value = objects->at(mid)->get_oop();
506 if (value < key) {
507 min = mid + 1;
508 } else if (value > key) {
509 max = mid - 1;
510 } else {
511 return mid;
512 }
513 }
514 return min;
515 }
516
517 // ------------------------------------------------------------------
518 // ciObjectFactory::is_found_at
519 //
520 // Verify that the binary seach found the given key.
521 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) {
522 return (index < objects->length() &&
523 objects->at(index)->get_oop() == key);
524 }
525
526
527 // ------------------------------------------------------------------
528 // ciObjectFactory::insert
529 //
530 // Insert a ciObject into the table at some index.
531 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) {
532 int len = objects->length();
533 if (len == index) {
534 objects->append(obj);
535 } else {
536 objects->append(objects->at(len-1));
537 int pos;
538 for (pos = len-2; pos >= index; pos--) {
539 objects->at_put(pos+1,objects->at(pos));
540 }
541 objects->at_put(index, obj);
542 }
543 #ifdef ASSERT
544 if (CIObjectFactoryVerify) {
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 }
552 #endif // ASSERT
553 }
554
555 static ciObjectFactory::NonPermObject* emptyBucket = NULL;
556
557 // ------------------------------------------------------------------
558 // ciObjectFactory::find_non_perm
559 //
560 // Use a small hash table, hashed on the klass of the key.
561 // If there is no entry in the cache corresponding to this oop, return
562 // the null tail of the bucket into which the oop should be inserted.
563 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) {
564 // Be careful: is_perm might change from false to true.
565 // Thus, there might be a matching perm object in the table.
566 // If there is, this probe must find it.
567 if (key->is_perm() && _non_perm_count == 0) {
568 return emptyBucket;
569 } else if (key->is_instance()) {
570 if (key->klass() == SystemDictionary::class_klass()) {
571 // class mirror instances are always perm
572 return emptyBucket;
573 }
574 // fall through to probe
575 } else if (key->is_array()) {
576 // fall through to probe
577 } else {
578 // not an array or instance
579 return emptyBucket;
580 }
581
582 ciObject* klass = get(key->klass());
583 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS];
584 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) {
585 if (is_equal(p, key)) break;
586 }
587 return (*bp);
588 }
589
590
591
592 // ------------------------------------------------------------------
593 // Code for for NonPermObject
594 //
595 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) {
596 assert(ciObjectFactory::is_initialized(), "");
597 _object = object;
598 _next = bucket;
599 bucket = this;
600 }
601
602
603
604 // ------------------------------------------------------------------
605 // ciObjectFactory::insert_non_perm
606 //
607 // Insert a ciObject into the non-perm table.
608 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) {
609 assert(&where != &emptyBucket, "must not try to fill empty bucket");
610 NonPermObject* p = new (arena()) NonPermObject(where, key, obj);
611 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match");
612 assert(find_non_perm(key) == p, "must find the same spot");
613 ++_non_perm_count;
614 }
615
616 // ------------------------------------------------------------------
617 // ciObjectFactory::vm_symbol_at
618 // Get the ciSymbol corresponding to some index in vmSymbols.
619 ciSymbol* ciObjectFactory::vm_symbol_at(int index) {
620 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob");
621 return _shared_ci_symbols[index];
622 }
623
624 // ------------------------------------------------------------------
625 // ciObjectFactory::print_contents_impl
626 void ciObjectFactory::print_contents_impl() {
627 int len = _ci_objects->length();
628 tty->print_cr("ciObjectFactory (%d) oop contents:", len);
629 for (int i=0; i<len; i++) {
630 _ci_objects->at(i)->print();
631 tty->cr();
632 }
633 }
634
635 // ------------------------------------------------------------------
636 // ciObjectFactory::print_contents
637 void ciObjectFactory::print_contents() {
638 print();
639 tty->cr();
640 GUARDED_VM_ENTRY(print_contents_impl();)
641 }
642
643 // ------------------------------------------------------------------
644 // ciObjectFactory::print
645 //
646 // Print debugging information about the object factory
647 void ciObjectFactory::print() {
648 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_klasses=%d>",
649 _ci_objects->length(), _unloaded_methods->length(),
650 _unloaded_klasses->length());
651 }