Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 2015:79d8657be916
6993125: runThese crashes with assert(Thread::current()->on_local_stack((address)this))
Summary: add another ResourceObj debug field to distinguish garbage
Reviewed-by: dholmes, coleenp
author | kvn |
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date | Fri, 10 Dec 2010 14:14:02 -0800 |
parents | f95d63e2154a |
children | 06f017f7daa7 3582bf76420e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciCPCache.hpp" | |
27 #include "ci/ciCallSite.hpp" | |
28 #include "ci/ciInstance.hpp" | |
29 #include "ci/ciInstanceKlass.hpp" | |
30 #include "ci/ciInstanceKlassKlass.hpp" | |
31 #include "ci/ciMethod.hpp" | |
32 #include "ci/ciMethodData.hpp" | |
33 #include "ci/ciMethodHandle.hpp" | |
34 #include "ci/ciMethodKlass.hpp" | |
35 #include "ci/ciNullObject.hpp" | |
36 #include "ci/ciObjArray.hpp" | |
37 #include "ci/ciObjArrayKlass.hpp" | |
38 #include "ci/ciObjArrayKlassKlass.hpp" | |
39 #include "ci/ciObjectFactory.hpp" | |
40 #include "ci/ciSymbol.hpp" | |
41 #include "ci/ciSymbolKlass.hpp" | |
42 #include "ci/ciTypeArray.hpp" | |
43 #include "ci/ciTypeArrayKlass.hpp" | |
44 #include "ci/ciTypeArrayKlassKlass.hpp" | |
45 #include "ci/ciUtilities.hpp" | |
46 #include "classfile/systemDictionary.hpp" | |
47 #include "gc_interface/collectedHeap.inline.hpp" | |
48 #include "memory/allocation.inline.hpp" | |
49 #include "oops/oop.inline.hpp" | |
50 #include "oops/oop.inline2.hpp" | |
51 #include "runtime/fieldType.hpp" | |
0 | 52 |
53 // ciObjectFactory | |
54 // | |
55 // This class handles requests for the creation of new instances | |
56 // of ciObject and its subclasses. It contains a caching mechanism | |
57 // which ensures that for each oop, at most one ciObject is created. | |
58 // This invariant allows more efficient implementation of ciObject. | |
59 // | |
60 // Implementation note: the oop->ciObject mapping is represented as | |
61 // a table stored in an array. Even though objects are moved | |
62 // by the garbage collector, the compactor preserves their relative | |
63 // order; address comparison of oops (in perm space) is safe so long | |
64 // as we prohibit GC during our comparisons. We currently use binary | |
65 // search to find the oop in the table, and inserting a new oop | |
66 // into the table may be costly. If this cost ends up being | |
67 // problematic the underlying data structure can be switched to some | |
68 // sort of balanced binary tree. | |
69 | |
70 GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL; | |
71 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; | |
72 int ciObjectFactory::_shared_ident_limit = 0; | |
73 volatile bool ciObjectFactory::_initialized = false; | |
74 | |
75 | |
76 // ------------------------------------------------------------------ | |
77 // ciObjectFactory::ciObjectFactory | |
78 ciObjectFactory::ciObjectFactory(Arena* arena, | |
79 int expected_size) { | |
80 | |
81 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
82 _non_perm_bucket[i] = NULL; | |
83 } | |
84 _non_perm_count = 0; | |
85 | |
86 _next_ident = _shared_ident_limit; | |
87 _arena = arena; | |
88 _ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL); | |
89 | |
90 // If the shared ci objects exist append them to this factory's objects | |
91 | |
92 if (_shared_ci_objects != NULL) { | |
93 _ci_objects->appendAll(_shared_ci_objects); | |
94 } | |
95 | |
96 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); | |
97 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); | |
1602 | 98 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
0 | 99 _return_addresses = |
100 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
101 } | |
102 | |
103 // ------------------------------------------------------------------ | |
104 // ciObjectFactory::ciObjectFactory | |
105 void ciObjectFactory::initialize() { | |
106 ASSERT_IN_VM; | |
107 JavaThread* thread = JavaThread::current(); | |
108 HandleMark handle_mark(thread); | |
109 | |
110 // This Arena is long lived and exists in the resource mark of the | |
111 // compiler thread that initializes the initial ciObjectFactory which | |
112 // creates the shared ciObjects that all later ciObjectFactories use. | |
113 Arena* arena = new Arena(); | |
114 ciEnv initial(arena); | |
115 ciEnv* env = ciEnv::current(); | |
116 env->_factory->init_shared_objects(); | |
117 | |
118 _initialized = true; | |
119 | |
120 } | |
121 | |
122 void ciObjectFactory::init_shared_objects() { | |
123 | |
124 _next_ident = 1; // start numbering CI objects at 1 | |
125 | |
126 { | |
127 // Create the shared symbols, but not in _shared_ci_objects. | |
128 int i; | |
129 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
130 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i); | |
131 assert(vmSymbols::find_sid(sym_handle()) == i, "1-1 mapping"); | |
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132 ciSymbol* sym = new (_arena) ciSymbol(sym_handle, (vmSymbols::SID) i); |
0 | 133 init_ident_of(sym); |
134 _shared_ci_symbols[i] = sym; | |
135 } | |
136 #ifdef ASSERT | |
137 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
138 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i); | |
139 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); | |
140 assert(sym->get_oop() == sym_handle(), "oop must match"); | |
141 } | |
142 assert(ciSymbol::void_class_signature()->get_oop() == vmSymbols::void_class_signature(), "spot check"); | |
143 #endif | |
144 } | |
145 | |
146 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL); | |
147 | |
148 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
149 BasicType t = (BasicType)i; | |
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150 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) { |
0 | 151 ciType::_basic_types[t] = new (_arena) ciType(t); |
152 init_ident_of(ciType::_basic_types[t]); | |
153 } | |
154 } | |
155 | |
156 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
157 init_ident_of(ciEnv::_null_object_instance); | |
158 ciEnv::_method_klass_instance = | |
159 get(Universe::methodKlassObj())->as_method_klass(); | |
160 ciEnv::_symbol_klass_instance = | |
161 get(Universe::symbolKlassObj())->as_symbol_klass(); | |
162 ciEnv::_klass_klass_instance = | |
163 get(Universe::klassKlassObj())->as_klass_klass(); | |
164 ciEnv::_instance_klass_klass_instance = | |
165 get(Universe::instanceKlassKlassObj()) | |
166 ->as_instance_klass_klass(); | |
167 ciEnv::_type_array_klass_klass_instance = | |
168 get(Universe::typeArrayKlassKlassObj()) | |
169 ->as_type_array_klass_klass(); | |
170 ciEnv::_obj_array_klass_klass_instance = | |
171 get(Universe::objArrayKlassKlassObj()) | |
172 ->as_obj_array_klass_klass(); | |
1142 | 173 |
174 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
175 if (SystemDictionary::name() != NULL) \ | |
176 ciEnv::_##name = get(SystemDictionary::name())->as_instance_klass(); | |
177 | |
178 WK_KLASSES_DO(WK_KLASS_DEFN) | |
179 #undef WK_KLASS_DEFN | |
0 | 180 |
181 for (int len = -1; len != _ci_objects->length(); ) { | |
182 len = _ci_objects->length(); | |
183 for (int i2 = 0; i2 < len; i2++) { | |
184 ciObject* obj = _ci_objects->at(i2); | |
185 if (obj->is_loaded() && obj->is_instance_klass()) { | |
186 obj->as_instance_klass()->compute_nonstatic_fields(); | |
187 } | |
188 } | |
189 } | |
190 | |
191 ciEnv::_unloaded_cisymbol = (ciSymbol*) ciObjectFactory::get(vmSymbols::dummy_symbol_oop()); | |
192 // Create dummy instanceKlass and objArrayKlass object and assign them idents | |
193 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); | |
194 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
195 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
196 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
197 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
198 | |
199 get(Universe::boolArrayKlassObj()); | |
200 get(Universe::charArrayKlassObj()); | |
201 get(Universe::singleArrayKlassObj()); | |
202 get(Universe::doubleArrayKlassObj()); | |
203 get(Universe::byteArrayKlassObj()); | |
204 get(Universe::shortArrayKlassObj()); | |
205 get(Universe::intArrayKlassObj()); | |
206 get(Universe::longArrayKlassObj()); | |
207 | |
208 | |
209 | |
210 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
211 | |
212 // The shared_ident_limit is the first ident number that will | |
213 // be used for non-shared objects. That is, numbers less than | |
214 // this limit are permanently assigned to shared CI objects, | |
215 // while the higher numbers are recycled afresh by each new ciEnv. | |
216 | |
217 _shared_ident_limit = _next_ident; | |
218 _shared_ci_objects = _ci_objects; | |
219 } | |
220 | |
221 // ------------------------------------------------------------------ | |
222 // ciObjectFactory::get | |
223 // | |
224 // Get the ciObject corresponding to some oop. If the ciObject has | |
225 // already been created, it is returned. Otherwise, a new ciObject | |
226 // is created. | |
227 ciObject* ciObjectFactory::get(oop key) { | |
228 ASSERT_IN_VM; | |
229 | |
230 #ifdef ASSERT | |
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231 if (CIObjectFactoryVerify) { |
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232 oop last = NULL; |
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233 for (int j = 0; j< _ci_objects->length(); j++) { |
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234 oop o = _ci_objects->at(j)->get_oop(); |
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235 assert(last < o, "out of order"); |
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236 last = o; |
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237 } |
0 | 238 } |
239 #endif // ASSERT | |
240 int len = _ci_objects->length(); | |
241 int index = find(key, _ci_objects); | |
242 #ifdef ASSERT | |
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243 if (CIObjectFactoryVerify) { |
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244 for (int i=0; i<_ci_objects->length(); i++) { |
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245 if (_ci_objects->at(i)->get_oop() == key) { |
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246 assert(index == i, " bad lookup"); |
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247 } |
0 | 248 } |
249 } | |
250 #endif | |
251 if (!is_found_at(index, key, _ci_objects)) { | |
252 // Check in the non-perm area before putting it in the list. | |
253 NonPermObject* &bucket = find_non_perm(key); | |
254 if (bucket != NULL) { | |
255 return bucket->object(); | |
256 } | |
257 | |
258 // Check in the shared symbol area before putting it in the list. | |
259 if (key->is_symbol()) { | |
260 vmSymbols::SID sid = vmSymbols::find_sid((symbolOop)key); | |
261 if (sid != vmSymbols::NO_SID) { | |
262 // do not pollute the main cache with it | |
263 return vm_symbol_at(sid); | |
264 } | |
265 } | |
266 | |
267 // The ciObject does not yet exist. Create it and insert it | |
268 // into the cache. | |
269 Handle keyHandle(key); | |
270 ciObject* new_object = create_new_object(keyHandle()); | |
271 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); | |
272 init_ident_of(new_object); | |
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273 if (!new_object->is_perm()) { |
0 | 274 // Not a perm-space object. |
275 insert_non_perm(bucket, keyHandle(), new_object); | |
276 return new_object; | |
277 } | |
278 if (len != _ci_objects->length()) { | |
279 // creating the new object has recursively entered new objects | |
280 // into the table. We need to recompute our index. | |
281 index = find(keyHandle(), _ci_objects); | |
282 } | |
283 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert"); | |
284 insert(index, new_object, _ci_objects); | |
285 return new_object; | |
286 } | |
287 return _ci_objects->at(index); | |
288 } | |
289 | |
290 // ------------------------------------------------------------------ | |
291 // ciObjectFactory::create_new_object | |
292 // | |
293 // Create a new ciObject from an oop. | |
294 // | |
295 // Implementation note: this functionality could be virtual behavior | |
296 // of the oop itself. For now, we explicitly marshal the object. | |
297 ciObject* ciObjectFactory::create_new_object(oop o) { | |
298 EXCEPTION_CONTEXT; | |
299 | |
300 if (o->is_symbol()) { | |
301 symbolHandle h_o(THREAD, (symbolOop)o); | |
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302 assert(vmSymbols::find_sid(h_o()) == vmSymbols::NO_SID, ""); |
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303 return new (arena()) ciSymbol(h_o, vmSymbols::NO_SID); |
0 | 304 } else if (o->is_klass()) { |
305 KlassHandle h_k(THREAD, (klassOop)o); | |
306 Klass* k = ((klassOop)o)->klass_part(); | |
307 if (k->oop_is_instance()) { | |
308 return new (arena()) ciInstanceKlass(h_k); | |
309 } else if (k->oop_is_objArray()) { | |
310 return new (arena()) ciObjArrayKlass(h_k); | |
311 } else if (k->oop_is_typeArray()) { | |
312 return new (arena()) ciTypeArrayKlass(h_k); | |
313 } else if (k->oop_is_method()) { | |
314 return new (arena()) ciMethodKlass(h_k); | |
315 } else if (k->oop_is_symbol()) { | |
316 return new (arena()) ciSymbolKlass(h_k); | |
317 } else if (k->oop_is_klass()) { | |
318 if (k->oop_is_objArrayKlass()) { | |
319 return new (arena()) ciObjArrayKlassKlass(h_k); | |
320 } else if (k->oop_is_typeArrayKlass()) { | |
321 return new (arena()) ciTypeArrayKlassKlass(h_k); | |
322 } else if (k->oop_is_instanceKlass()) { | |
323 return new (arena()) ciInstanceKlassKlass(h_k); | |
324 } else { | |
325 assert(o == Universe::klassKlassObj(), "bad klassKlass"); | |
326 return new (arena()) ciKlassKlass(h_k); | |
327 } | |
328 } | |
329 } else if (o->is_method()) { | |
330 methodHandle h_m(THREAD, (methodOop)o); | |
331 return new (arena()) ciMethod(h_m); | |
332 } else if (o->is_methodData()) { | |
333 methodDataHandle h_md(THREAD, (methodDataOop)o); | |
334 return new (arena()) ciMethodData(h_md); | |
335 } else if (o->is_instance()) { | |
336 instanceHandle h_i(THREAD, (instanceOop)o); | |
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337 if (java_dyn_CallSite::is_instance(o)) |
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338 return new (arena()) ciCallSite(h_i); |
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339 else if (java_dyn_MethodHandle::is_instance(o)) |
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340 return new (arena()) ciMethodHandle(h_i); |
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341 else |
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342 return new (arena()) ciInstance(h_i); |
0 | 343 } else if (o->is_objArray()) { |
344 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
345 return new (arena()) ciObjArray(h_oa); | |
346 } else if (o->is_typeArray()) { | |
347 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
348 return new (arena()) ciTypeArray(h_ta); | |
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349 } else if (o->is_constantPoolCache()) { |
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350 constantPoolCacheHandle h_cpc(THREAD, (constantPoolCacheOop) o); |
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351 return new (arena()) ciCPCache(h_cpc); |
0 | 352 } |
353 | |
354 // The oop is of some type not supported by the compiler interface. | |
355 ShouldNotReachHere(); | |
356 return NULL; | |
357 } | |
358 | |
359 //------------------------------------------------------------------ | |
360 // ciObjectFactory::get_unloaded_method | |
361 // | |
362 // Get the ciMethod representing an unloaded/unfound method. | |
363 // | |
364 // Implementation note: unloaded methods are currently stored in | |
365 // an unordered array, requiring a linear-time lookup for each | |
366 // unloaded method. This may need to change. | |
367 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
368 ciSymbol* name, | |
369 ciSymbol* signature) { | |
370 for (int i=0; i<_unloaded_methods->length(); i++) { | |
371 ciMethod* entry = _unloaded_methods->at(i); | |
372 if (entry->holder()->equals(holder) && | |
373 entry->name()->equals(name) && | |
374 entry->signature()->as_symbol()->equals(signature)) { | |
375 // We've found a match. | |
376 return entry; | |
377 } | |
378 } | |
379 | |
380 // This is a new unloaded method. Create it and stick it in | |
381 // the cache. | |
382 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature); | |
383 | |
384 init_ident_of(new_method); | |
385 _unloaded_methods->append(new_method); | |
386 | |
387 return new_method; | |
388 } | |
389 | |
390 //------------------------------------------------------------------ | |
391 // ciObjectFactory::get_unloaded_klass | |
392 // | |
393 // Get a ciKlass representing an unloaded klass. | |
394 // | |
395 // Implementation note: unloaded klasses are currently stored in | |
396 // an unordered array, requiring a linear-time lookup for each | |
397 // unloaded klass. This may need to change. | |
398 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
399 ciSymbol* name, | |
400 bool create_if_not_found) { | |
401 EXCEPTION_CONTEXT; | |
402 oop loader = NULL; | |
403 oop domain = NULL; | |
404 if (accessing_klass != NULL) { | |
405 loader = accessing_klass->loader(); | |
406 domain = accessing_klass->protection_domain(); | |
407 } | |
408 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
409 ciKlass* entry = _unloaded_klasses->at(i); | |
410 if (entry->name()->equals(name) && | |
411 entry->loader() == loader && | |
412 entry->protection_domain() == domain) { | |
413 // We've found a match. | |
414 return entry; | |
415 } | |
416 } | |
417 | |
418 if (!create_if_not_found) | |
419 return NULL; | |
420 | |
421 // This is a new unloaded klass. Create it and stick it in | |
422 // the cache. | |
423 ciKlass* new_klass = NULL; | |
424 | |
425 // Two cases: this is an unloaded objArrayKlass or an | |
426 // unloaded instanceKlass. Deal with both. | |
427 if (name->byte_at(0) == '[') { | |
428 // Decompose the name.' | |
429 jint dimension = 0; | |
430 symbolOop element_name = NULL; | |
431 BasicType element_type= FieldType::get_array_info(name->get_symbolOop(), | |
432 &dimension, | |
433 &element_name, | |
434 THREAD); | |
435 if (HAS_PENDING_EXCEPTION) { | |
436 CLEAR_PENDING_EXCEPTION; | |
437 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
438 return ciEnv::_unloaded_ciobjarrayklass; | |
439 } | |
440 assert(element_type != T_ARRAY, "unsuccessful decomposition"); | |
441 ciKlass* element_klass = NULL; | |
442 if (element_type == T_OBJECT) { | |
443 ciEnv *env = CURRENT_THREAD_ENV; | |
444 ciSymbol* ci_name = env->get_object(element_name)->as_symbol(); | |
445 element_klass = | |
446 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
447 } else { | |
448 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
449 | |
450 // The type array itself takes care of one of the dimensions. | |
451 dimension--; | |
452 | |
453 // The element klass is a typeArrayKlass. | |
454 element_klass = ciTypeArrayKlass::make(element_type); | |
455 } | |
456 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
457 } else { | |
458 jobject loader_handle = NULL; | |
459 jobject domain_handle = NULL; | |
460 if (accessing_klass != NULL) { | |
461 loader_handle = accessing_klass->loader_handle(); | |
462 domain_handle = accessing_klass->protection_domain_handle(); | |
463 } | |
464 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
465 } | |
466 init_ident_of(new_klass); | |
467 _unloaded_klasses->append(new_klass); | |
468 | |
469 return new_klass; | |
470 } | |
471 | |
1602 | 472 |
473 //------------------------------------------------------------------ | |
474 // ciObjectFactory::get_unloaded_instance | |
475 // | |
476 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
477 // | |
478 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
479 for (int i=0; i<_unloaded_instances->length(); i++) { | |
480 ciInstance* entry = _unloaded_instances->at(i); | |
481 if (entry->klass()->equals(instance_klass)) { | |
482 // We've found a match. | |
483 return entry; | |
484 } | |
485 } | |
486 | |
487 // This is a new unloaded instance. Create it and stick it in | |
488 // the cache. | |
489 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
490 | |
491 init_ident_of(new_instance); | |
492 _unloaded_instances->append(new_instance); | |
493 | |
494 // make sure it looks the way we want: | |
495 assert(!new_instance->is_loaded(), ""); | |
496 assert(new_instance->klass() == instance_klass, ""); | |
497 | |
498 return new_instance; | |
499 } | |
500 | |
501 | |
502 //------------------------------------------------------------------ | |
503 // ciObjectFactory::get_unloaded_klass_mirror | |
504 // | |
505 // Get a ciInstance representing an unresolved klass mirror. | |
506 // | |
507 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
508 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
509 assert(ciEnv::_Class_klass != NULL, ""); | |
510 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
511 } | |
512 | |
513 //------------------------------------------------------------------ | |
514 // ciObjectFactory::get_unloaded_method_handle_constant | |
515 // | |
516 // Get a ciInstance representing an unresolved method handle constant. | |
517 // | |
518 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
519 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
520 ciSymbol* name, | |
521 ciSymbol* signature, | |
522 int ref_kind) { | |
523 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
524 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
525 } | |
526 | |
527 //------------------------------------------------------------------ | |
528 // ciObjectFactory::get_unloaded_method_type_constant | |
529 // | |
530 // Get a ciInstance representing an unresolved method type constant. | |
531 // | |
532 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
533 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
534 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
535 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
536 } | |
537 | |
538 | |
539 | |
0 | 540 //------------------------------------------------------------------ |
541 // ciObjectFactory::get_empty_methodData | |
542 // | |
543 // Get the ciMethodData representing the methodData for a method with | |
544 // none. | |
545 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
546 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
547 init_ident_of(new_methodData); | |
548 return new_methodData; | |
549 } | |
550 | |
551 //------------------------------------------------------------------ | |
552 // ciObjectFactory::get_return_address | |
553 // | |
554 // Get a ciReturnAddress for a specified bci. | |
555 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
556 for (int i=0; i<_return_addresses->length(); i++) { | |
557 ciReturnAddress* entry = _return_addresses->at(i); | |
558 if (entry->bci() == bci) { | |
559 // We've found a match. | |
560 return entry; | |
561 } | |
562 } | |
563 | |
564 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
565 init_ident_of(new_ret_addr); | |
566 _return_addresses->append(new_ret_addr); | |
567 return new_ret_addr; | |
568 } | |
569 | |
570 // ------------------------------------------------------------------ | |
571 // ciObjectFactory::init_ident_of | |
572 void ciObjectFactory::init_ident_of(ciObject* obj) { | |
573 obj->set_ident(_next_ident++); | |
574 } | |
575 | |
576 | |
577 // ------------------------------------------------------------------ | |
578 // ciObjectFactory::find | |
579 // | |
580 // Use binary search to find the position of this oop in the cache. | |
581 // If there is no entry in the cache corresponding to this oop, return | |
582 // the position at which the oop should be inserted. | |
583 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) { | |
584 int min = 0; | |
585 int max = objects->length()-1; | |
586 | |
587 // print_contents(); | |
588 | |
589 while (max >= min) { | |
590 int mid = (max + min) / 2; | |
591 oop value = objects->at(mid)->get_oop(); | |
592 if (value < key) { | |
593 min = mid + 1; | |
594 } else if (value > key) { | |
595 max = mid - 1; | |
596 } else { | |
597 return mid; | |
598 } | |
599 } | |
600 return min; | |
601 } | |
602 | |
603 // ------------------------------------------------------------------ | |
604 // ciObjectFactory::is_found_at | |
605 // | |
606 // Verify that the binary seach found the given key. | |
607 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) { | |
608 return (index < objects->length() && | |
609 objects->at(index)->get_oop() == key); | |
610 } | |
611 | |
612 | |
613 // ------------------------------------------------------------------ | |
614 // ciObjectFactory::insert | |
615 // | |
616 // Insert a ciObject into the table at some index. | |
617 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) { | |
618 int len = objects->length(); | |
619 if (len == index) { | |
620 objects->append(obj); | |
621 } else { | |
622 objects->append(objects->at(len-1)); | |
623 int pos; | |
624 for (pos = len-2; pos >= index; pos--) { | |
625 objects->at_put(pos+1,objects->at(pos)); | |
626 } | |
627 objects->at_put(index, obj); | |
628 } | |
629 #ifdef ASSERT | |
909
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630 if (CIObjectFactoryVerify) { |
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631 oop last = NULL; |
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632 for (int j = 0; j< objects->length(); j++) { |
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633 oop o = objects->at(j)->get_oop(); |
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634 assert(last < o, "out of order"); |
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635 last = o; |
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636 } |
0 | 637 } |
638 #endif // ASSERT | |
639 } | |
640 | |
641 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
642 | |
643 // ------------------------------------------------------------------ | |
644 // ciObjectFactory::find_non_perm | |
645 // | |
646 // Use a small hash table, hashed on the klass of the key. | |
647 // If there is no entry in the cache corresponding to this oop, return | |
648 // the null tail of the bucket into which the oop should be inserted. | |
649 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
650 // Be careful: is_perm might change from false to true. | |
651 // Thus, there might be a matching perm object in the table. | |
652 // If there is, this probe must find it. | |
653 if (key->is_perm() && _non_perm_count == 0) { | |
654 return emptyBucket; | |
655 } else if (key->is_instance()) { | |
1142 | 656 if (key->klass() == SystemDictionary::Class_klass()) { |
0 | 657 // class mirror instances are always perm |
658 return emptyBucket; | |
659 } | |
660 // fall through to probe | |
661 } else if (key->is_array()) { | |
662 // fall through to probe | |
663 } else { | |
664 // not an array or instance | |
665 return emptyBucket; | |
666 } | |
667 | |
668 ciObject* klass = get(key->klass()); | |
669 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; | |
670 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
671 if (is_equal(p, key)) break; | |
672 } | |
673 return (*bp); | |
674 } | |
675 | |
676 | |
677 | |
678 // ------------------------------------------------------------------ | |
679 // Code for for NonPermObject | |
680 // | |
681 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
682 assert(ciObjectFactory::is_initialized(), ""); | |
683 _object = object; | |
684 _next = bucket; | |
685 bucket = this; | |
686 } | |
687 | |
688 | |
689 | |
690 // ------------------------------------------------------------------ | |
691 // ciObjectFactory::insert_non_perm | |
692 // | |
693 // Insert a ciObject into the non-perm table. | |
694 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
695 assert(&where != &emptyBucket, "must not try to fill empty bucket"); | |
696 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
697 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
698 assert(find_non_perm(key) == p, "must find the same spot"); | |
699 ++_non_perm_count; | |
700 } | |
701 | |
702 // ------------------------------------------------------------------ | |
703 // ciObjectFactory::vm_symbol_at | |
704 // Get the ciSymbol corresponding to some index in vmSymbols. | |
705 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
706 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
707 return _shared_ci_symbols[index]; | |
708 } | |
709 | |
710 // ------------------------------------------------------------------ | |
711 // ciObjectFactory::print_contents_impl | |
712 void ciObjectFactory::print_contents_impl() { | |
713 int len = _ci_objects->length(); | |
714 tty->print_cr("ciObjectFactory (%d) oop contents:", len); | |
715 for (int i=0; i<len; i++) { | |
716 _ci_objects->at(i)->print(); | |
717 tty->cr(); | |
718 } | |
719 } | |
720 | |
721 // ------------------------------------------------------------------ | |
722 // ciObjectFactory::print_contents | |
723 void ciObjectFactory::print_contents() { | |
724 print(); | |
725 tty->cr(); | |
726 GUARDED_VM_ENTRY(print_contents_impl();) | |
727 } | |
728 | |
729 // ------------------------------------------------------------------ | |
730 // ciObjectFactory::print | |
731 // | |
732 // Print debugging information about the object factory | |
733 void ciObjectFactory::print() { | |
1602 | 734 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
0 | 735 _ci_objects->length(), _unloaded_methods->length(), |
1602 | 736 _unloaded_instances->length(), |
0 | 737 _unloaded_klasses->length()); |
738 } |