Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciObjectFactory.cpp @ 1782:f353275af40e
6981773: incorrect fill value with OptimizeFill
Reviewed-by: kvn, twisti
author | never |
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date | Thu, 02 Sep 2010 11:40:02 -0700 |
parents | 136b78722a08 |
children | 2d26b0046e0d f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2009, 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 | |
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); | |
1602 | 73 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
0 | 74 _return_addresses = |
75 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
76 } | |
77 | |
78 // ------------------------------------------------------------------ | |
79 // ciObjectFactory::ciObjectFactory | |
80 void ciObjectFactory::initialize() { | |
81 ASSERT_IN_VM; | |
82 JavaThread* thread = JavaThread::current(); | |
83 HandleMark handle_mark(thread); | |
84 | |
85 // This Arena is long lived and exists in the resource mark of the | |
86 // compiler thread that initializes the initial ciObjectFactory which | |
87 // creates the shared ciObjects that all later ciObjectFactories use. | |
88 Arena* arena = new Arena(); | |
89 ciEnv initial(arena); | |
90 ciEnv* env = ciEnv::current(); | |
91 env->_factory->init_shared_objects(); | |
92 | |
93 _initialized = true; | |
94 | |
95 } | |
96 | |
97 void ciObjectFactory::init_shared_objects() { | |
98 | |
99 _next_ident = 1; // start numbering CI objects at 1 | |
100 | |
101 { | |
102 // Create the shared symbols, but not in _shared_ci_objects. | |
103 int i; | |
104 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
105 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i); | |
106 assert(vmSymbols::find_sid(sym_handle()) == i, "1-1 mapping"); | |
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107 ciSymbol* sym = new (_arena) ciSymbol(sym_handle, (vmSymbols::SID) i); |
0 | 108 init_ident_of(sym); |
109 _shared_ci_symbols[i] = sym; | |
110 } | |
111 #ifdef ASSERT | |
112 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
113 symbolHandle sym_handle = vmSymbolHandles::symbol_handle_at((vmSymbols::SID) i); | |
114 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); | |
115 assert(sym->get_oop() == sym_handle(), "oop must match"); | |
116 } | |
117 assert(ciSymbol::void_class_signature()->get_oop() == vmSymbols::void_class_signature(), "spot check"); | |
118 #endif | |
119 } | |
120 | |
121 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL); | |
122 | |
123 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
124 BasicType t = (BasicType)i; | |
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125 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) { |
0 | 126 ciType::_basic_types[t] = new (_arena) ciType(t); |
127 init_ident_of(ciType::_basic_types[t]); | |
128 } | |
129 } | |
130 | |
131 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
132 init_ident_of(ciEnv::_null_object_instance); | |
133 ciEnv::_method_klass_instance = | |
134 get(Universe::methodKlassObj())->as_method_klass(); | |
135 ciEnv::_symbol_klass_instance = | |
136 get(Universe::symbolKlassObj())->as_symbol_klass(); | |
137 ciEnv::_klass_klass_instance = | |
138 get(Universe::klassKlassObj())->as_klass_klass(); | |
139 ciEnv::_instance_klass_klass_instance = | |
140 get(Universe::instanceKlassKlassObj()) | |
141 ->as_instance_klass_klass(); | |
142 ciEnv::_type_array_klass_klass_instance = | |
143 get(Universe::typeArrayKlassKlassObj()) | |
144 ->as_type_array_klass_klass(); | |
145 ciEnv::_obj_array_klass_klass_instance = | |
146 get(Universe::objArrayKlassKlassObj()) | |
147 ->as_obj_array_klass_klass(); | |
1142 | 148 |
149 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
150 if (SystemDictionary::name() != NULL) \ | |
151 ciEnv::_##name = get(SystemDictionary::name())->as_instance_klass(); | |
152 | |
153 WK_KLASSES_DO(WK_KLASS_DEFN) | |
154 #undef WK_KLASS_DEFN | |
0 | 155 |
156 for (int len = -1; len != _ci_objects->length(); ) { | |
157 len = _ci_objects->length(); | |
158 for (int i2 = 0; i2 < len; i2++) { | |
159 ciObject* obj = _ci_objects->at(i2); | |
160 if (obj->is_loaded() && obj->is_instance_klass()) { | |
161 obj->as_instance_klass()->compute_nonstatic_fields(); | |
162 } | |
163 } | |
164 } | |
165 | |
166 ciEnv::_unloaded_cisymbol = (ciSymbol*) ciObjectFactory::get(vmSymbols::dummy_symbol_oop()); | |
167 // Create dummy instanceKlass and objArrayKlass object and assign them idents | |
168 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); | |
169 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
170 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
171 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
172 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
173 | |
174 get(Universe::boolArrayKlassObj()); | |
175 get(Universe::charArrayKlassObj()); | |
176 get(Universe::singleArrayKlassObj()); | |
177 get(Universe::doubleArrayKlassObj()); | |
178 get(Universe::byteArrayKlassObj()); | |
179 get(Universe::shortArrayKlassObj()); | |
180 get(Universe::intArrayKlassObj()); | |
181 get(Universe::longArrayKlassObj()); | |
182 | |
183 | |
184 | |
185 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
186 | |
187 // The shared_ident_limit is the first ident number that will | |
188 // be used for non-shared objects. That is, numbers less than | |
189 // this limit are permanently assigned to shared CI objects, | |
190 // while the higher numbers are recycled afresh by each new ciEnv. | |
191 | |
192 _shared_ident_limit = _next_ident; | |
193 _shared_ci_objects = _ci_objects; | |
194 } | |
195 | |
196 // ------------------------------------------------------------------ | |
197 // ciObjectFactory::get | |
198 // | |
199 // Get the ciObject corresponding to some oop. If the ciObject has | |
200 // already been created, it is returned. Otherwise, a new ciObject | |
201 // is created. | |
202 ciObject* ciObjectFactory::get(oop key) { | |
203 ASSERT_IN_VM; | |
204 | |
205 #ifdef ASSERT | |
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206 if (CIObjectFactoryVerify) { |
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207 oop last = NULL; |
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208 for (int j = 0; j< _ci_objects->length(); j++) { |
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209 oop o = _ci_objects->at(j)->get_oop(); |
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210 assert(last < o, "out of order"); |
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211 last = o; |
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212 } |
0 | 213 } |
214 #endif // ASSERT | |
215 int len = _ci_objects->length(); | |
216 int index = find(key, _ci_objects); | |
217 #ifdef ASSERT | |
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218 if (CIObjectFactoryVerify) { |
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219 for (int i=0; i<_ci_objects->length(); i++) { |
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220 if (_ci_objects->at(i)->get_oop() == key) { |
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221 assert(index == i, " bad lookup"); |
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222 } |
0 | 223 } |
224 } | |
225 #endif | |
226 if (!is_found_at(index, key, _ci_objects)) { | |
227 // Check in the non-perm area before putting it in the list. | |
228 NonPermObject* &bucket = find_non_perm(key); | |
229 if (bucket != NULL) { | |
230 return bucket->object(); | |
231 } | |
232 | |
233 // Check in the shared symbol area before putting it in the list. | |
234 if (key->is_symbol()) { | |
235 vmSymbols::SID sid = vmSymbols::find_sid((symbolOop)key); | |
236 if (sid != vmSymbols::NO_SID) { | |
237 // do not pollute the main cache with it | |
238 return vm_symbol_at(sid); | |
239 } | |
240 } | |
241 | |
242 // The ciObject does not yet exist. Create it and insert it | |
243 // into the cache. | |
244 Handle keyHandle(key); | |
245 ciObject* new_object = create_new_object(keyHandle()); | |
246 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); | |
247 init_ident_of(new_object); | |
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248 if (!new_object->is_perm()) { |
0 | 249 // Not a perm-space object. |
250 insert_non_perm(bucket, keyHandle(), new_object); | |
251 return new_object; | |
252 } | |
253 if (len != _ci_objects->length()) { | |
254 // creating the new object has recursively entered new objects | |
255 // into the table. We need to recompute our index. | |
256 index = find(keyHandle(), _ci_objects); | |
257 } | |
258 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert"); | |
259 insert(index, new_object, _ci_objects); | |
260 return new_object; | |
261 } | |
262 return _ci_objects->at(index); | |
263 } | |
264 | |
265 // ------------------------------------------------------------------ | |
266 // ciObjectFactory::create_new_object | |
267 // | |
268 // Create a new ciObject from an oop. | |
269 // | |
270 // Implementation note: this functionality could be virtual behavior | |
271 // of the oop itself. For now, we explicitly marshal the object. | |
272 ciObject* ciObjectFactory::create_new_object(oop o) { | |
273 EXCEPTION_CONTEXT; | |
274 | |
275 if (o->is_symbol()) { | |
276 symbolHandle h_o(THREAD, (symbolOop)o); | |
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277 assert(vmSymbols::find_sid(h_o()) == vmSymbols::NO_SID, ""); |
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278 return new (arena()) ciSymbol(h_o, vmSymbols::NO_SID); |
0 | 279 } else if (o->is_klass()) { |
280 KlassHandle h_k(THREAD, (klassOop)o); | |
281 Klass* k = ((klassOop)o)->klass_part(); | |
282 if (k->oop_is_instance()) { | |
283 return new (arena()) ciInstanceKlass(h_k); | |
284 } else if (k->oop_is_objArray()) { | |
285 return new (arena()) ciObjArrayKlass(h_k); | |
286 } else if (k->oop_is_typeArray()) { | |
287 return new (arena()) ciTypeArrayKlass(h_k); | |
288 } else if (k->oop_is_method()) { | |
289 return new (arena()) ciMethodKlass(h_k); | |
290 } else if (k->oop_is_symbol()) { | |
291 return new (arena()) ciSymbolKlass(h_k); | |
292 } else if (k->oop_is_klass()) { | |
293 if (k->oop_is_objArrayKlass()) { | |
294 return new (arena()) ciObjArrayKlassKlass(h_k); | |
295 } else if (k->oop_is_typeArrayKlass()) { | |
296 return new (arena()) ciTypeArrayKlassKlass(h_k); | |
297 } else if (k->oop_is_instanceKlass()) { | |
298 return new (arena()) ciInstanceKlassKlass(h_k); | |
299 } else { | |
300 assert(o == Universe::klassKlassObj(), "bad klassKlass"); | |
301 return new (arena()) ciKlassKlass(h_k); | |
302 } | |
303 } | |
304 } else if (o->is_method()) { | |
305 methodHandle h_m(THREAD, (methodOop)o); | |
306 return new (arena()) ciMethod(h_m); | |
307 } else if (o->is_methodData()) { | |
308 methodDataHandle h_md(THREAD, (methodDataOop)o); | |
309 return new (arena()) ciMethodData(h_md); | |
310 } else if (o->is_instance()) { | |
311 instanceHandle h_i(THREAD, (instanceOop)o); | |
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312 if (java_dyn_CallSite::is_instance(o)) |
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313 return new (arena()) ciCallSite(h_i); |
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314 else if (java_dyn_MethodHandle::is_instance(o)) |
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315 return new (arena()) ciMethodHandle(h_i); |
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316 else |
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317 return new (arena()) ciInstance(h_i); |
0 | 318 } else if (o->is_objArray()) { |
319 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
320 return new (arena()) ciObjArray(h_oa); | |
321 } else if (o->is_typeArray()) { | |
322 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
323 return new (arena()) ciTypeArray(h_ta); | |
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324 } else if (o->is_constantPoolCache()) { |
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325 constantPoolCacheHandle h_cpc(THREAD, (constantPoolCacheOop) o); |
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326 return new (arena()) ciCPCache(h_cpc); |
0 | 327 } |
328 | |
329 // The oop is of some type not supported by the compiler interface. | |
330 ShouldNotReachHere(); | |
331 return NULL; | |
332 } | |
333 | |
334 //------------------------------------------------------------------ | |
335 // ciObjectFactory::get_unloaded_method | |
336 // | |
337 // Get the ciMethod representing an unloaded/unfound method. | |
338 // | |
339 // Implementation note: unloaded methods are currently stored in | |
340 // an unordered array, requiring a linear-time lookup for each | |
341 // unloaded method. This may need to change. | |
342 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
343 ciSymbol* name, | |
344 ciSymbol* signature) { | |
345 for (int i=0; i<_unloaded_methods->length(); i++) { | |
346 ciMethod* entry = _unloaded_methods->at(i); | |
347 if (entry->holder()->equals(holder) && | |
348 entry->name()->equals(name) && | |
349 entry->signature()->as_symbol()->equals(signature)) { | |
350 // We've found a match. | |
351 return entry; | |
352 } | |
353 } | |
354 | |
355 // This is a new unloaded method. Create it and stick it in | |
356 // the cache. | |
357 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature); | |
358 | |
359 init_ident_of(new_method); | |
360 _unloaded_methods->append(new_method); | |
361 | |
362 return new_method; | |
363 } | |
364 | |
365 //------------------------------------------------------------------ | |
366 // ciObjectFactory::get_unloaded_klass | |
367 // | |
368 // Get a ciKlass representing an unloaded klass. | |
369 // | |
370 // Implementation note: unloaded klasses are currently stored in | |
371 // an unordered array, requiring a linear-time lookup for each | |
372 // unloaded klass. This may need to change. | |
373 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
374 ciSymbol* name, | |
375 bool create_if_not_found) { | |
376 EXCEPTION_CONTEXT; | |
377 oop loader = NULL; | |
378 oop domain = NULL; | |
379 if (accessing_klass != NULL) { | |
380 loader = accessing_klass->loader(); | |
381 domain = accessing_klass->protection_domain(); | |
382 } | |
383 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
384 ciKlass* entry = _unloaded_klasses->at(i); | |
385 if (entry->name()->equals(name) && | |
386 entry->loader() == loader && | |
387 entry->protection_domain() == domain) { | |
388 // We've found a match. | |
389 return entry; | |
390 } | |
391 } | |
392 | |
393 if (!create_if_not_found) | |
394 return NULL; | |
395 | |
396 // This is a new unloaded klass. Create it and stick it in | |
397 // the cache. | |
398 ciKlass* new_klass = NULL; | |
399 | |
400 // Two cases: this is an unloaded objArrayKlass or an | |
401 // unloaded instanceKlass. Deal with both. | |
402 if (name->byte_at(0) == '[') { | |
403 // Decompose the name.' | |
404 jint dimension = 0; | |
405 symbolOop element_name = NULL; | |
406 BasicType element_type= FieldType::get_array_info(name->get_symbolOop(), | |
407 &dimension, | |
408 &element_name, | |
409 THREAD); | |
410 if (HAS_PENDING_EXCEPTION) { | |
411 CLEAR_PENDING_EXCEPTION; | |
412 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
413 return ciEnv::_unloaded_ciobjarrayklass; | |
414 } | |
415 assert(element_type != T_ARRAY, "unsuccessful decomposition"); | |
416 ciKlass* element_klass = NULL; | |
417 if (element_type == T_OBJECT) { | |
418 ciEnv *env = CURRENT_THREAD_ENV; | |
419 ciSymbol* ci_name = env->get_object(element_name)->as_symbol(); | |
420 element_klass = | |
421 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
422 } else { | |
423 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
424 | |
425 // The type array itself takes care of one of the dimensions. | |
426 dimension--; | |
427 | |
428 // The element klass is a typeArrayKlass. | |
429 element_klass = ciTypeArrayKlass::make(element_type); | |
430 } | |
431 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
432 } else { | |
433 jobject loader_handle = NULL; | |
434 jobject domain_handle = NULL; | |
435 if (accessing_klass != NULL) { | |
436 loader_handle = accessing_klass->loader_handle(); | |
437 domain_handle = accessing_klass->protection_domain_handle(); | |
438 } | |
439 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
440 } | |
441 init_ident_of(new_klass); | |
442 _unloaded_klasses->append(new_klass); | |
443 | |
444 return new_klass; | |
445 } | |
446 | |
1602 | 447 |
448 //------------------------------------------------------------------ | |
449 // ciObjectFactory::get_unloaded_instance | |
450 // | |
451 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
452 // | |
453 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
454 for (int i=0; i<_unloaded_instances->length(); i++) { | |
455 ciInstance* entry = _unloaded_instances->at(i); | |
456 if (entry->klass()->equals(instance_klass)) { | |
457 // We've found a match. | |
458 return entry; | |
459 } | |
460 } | |
461 | |
462 // This is a new unloaded instance. Create it and stick it in | |
463 // the cache. | |
464 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
465 | |
466 init_ident_of(new_instance); | |
467 _unloaded_instances->append(new_instance); | |
468 | |
469 // make sure it looks the way we want: | |
470 assert(!new_instance->is_loaded(), ""); | |
471 assert(new_instance->klass() == instance_klass, ""); | |
472 | |
473 return new_instance; | |
474 } | |
475 | |
476 | |
477 //------------------------------------------------------------------ | |
478 // ciObjectFactory::get_unloaded_klass_mirror | |
479 // | |
480 // Get a ciInstance representing an unresolved klass mirror. | |
481 // | |
482 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
483 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
484 assert(ciEnv::_Class_klass != NULL, ""); | |
485 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
486 } | |
487 | |
488 //------------------------------------------------------------------ | |
489 // ciObjectFactory::get_unloaded_method_handle_constant | |
490 // | |
491 // Get a ciInstance representing an unresolved method handle constant. | |
492 // | |
493 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
494 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
495 ciSymbol* name, | |
496 ciSymbol* signature, | |
497 int ref_kind) { | |
498 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
499 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
500 } | |
501 | |
502 //------------------------------------------------------------------ | |
503 // ciObjectFactory::get_unloaded_method_type_constant | |
504 // | |
505 // Get a ciInstance representing an unresolved method type constant. | |
506 // | |
507 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
508 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
509 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
510 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
511 } | |
512 | |
513 | |
514 | |
0 | 515 //------------------------------------------------------------------ |
516 // ciObjectFactory::get_empty_methodData | |
517 // | |
518 // Get the ciMethodData representing the methodData for a method with | |
519 // none. | |
520 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
521 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
522 init_ident_of(new_methodData); | |
523 return new_methodData; | |
524 } | |
525 | |
526 //------------------------------------------------------------------ | |
527 // ciObjectFactory::get_return_address | |
528 // | |
529 // Get a ciReturnAddress for a specified bci. | |
530 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
531 for (int i=0; i<_return_addresses->length(); i++) { | |
532 ciReturnAddress* entry = _return_addresses->at(i); | |
533 if (entry->bci() == bci) { | |
534 // We've found a match. | |
535 return entry; | |
536 } | |
537 } | |
538 | |
539 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
540 init_ident_of(new_ret_addr); | |
541 _return_addresses->append(new_ret_addr); | |
542 return new_ret_addr; | |
543 } | |
544 | |
545 // ------------------------------------------------------------------ | |
546 // ciObjectFactory::init_ident_of | |
547 void ciObjectFactory::init_ident_of(ciObject* obj) { | |
548 obj->set_ident(_next_ident++); | |
549 } | |
550 | |
551 | |
552 // ------------------------------------------------------------------ | |
553 // ciObjectFactory::find | |
554 // | |
555 // Use binary search to find the position of this oop in the cache. | |
556 // If there is no entry in the cache corresponding to this oop, return | |
557 // the position at which the oop should be inserted. | |
558 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) { | |
559 int min = 0; | |
560 int max = objects->length()-1; | |
561 | |
562 // print_contents(); | |
563 | |
564 while (max >= min) { | |
565 int mid = (max + min) / 2; | |
566 oop value = objects->at(mid)->get_oop(); | |
567 if (value < key) { | |
568 min = mid + 1; | |
569 } else if (value > key) { | |
570 max = mid - 1; | |
571 } else { | |
572 return mid; | |
573 } | |
574 } | |
575 return min; | |
576 } | |
577 | |
578 // ------------------------------------------------------------------ | |
579 // ciObjectFactory::is_found_at | |
580 // | |
581 // Verify that the binary seach found the given key. | |
582 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) { | |
583 return (index < objects->length() && | |
584 objects->at(index)->get_oop() == key); | |
585 } | |
586 | |
587 | |
588 // ------------------------------------------------------------------ | |
589 // ciObjectFactory::insert | |
590 // | |
591 // Insert a ciObject into the table at some index. | |
592 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) { | |
593 int len = objects->length(); | |
594 if (len == index) { | |
595 objects->append(obj); | |
596 } else { | |
597 objects->append(objects->at(len-1)); | |
598 int pos; | |
599 for (pos = len-2; pos >= index; pos--) { | |
600 objects->at_put(pos+1,objects->at(pos)); | |
601 } | |
602 objects->at_put(index, obj); | |
603 } | |
604 #ifdef ASSERT | |
909
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605 if (CIObjectFactoryVerify) { |
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606 oop last = NULL; |
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607 for (int j = 0; j< objects->length(); j++) { |
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608 oop o = objects->at(j)->get_oop(); |
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609 assert(last < o, "out of order"); |
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610 last = o; |
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611 } |
0 | 612 } |
613 #endif // ASSERT | |
614 } | |
615 | |
616 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
617 | |
618 // ------------------------------------------------------------------ | |
619 // ciObjectFactory::find_non_perm | |
620 // | |
621 // Use a small hash table, hashed on the klass of the key. | |
622 // If there is no entry in the cache corresponding to this oop, return | |
623 // the null tail of the bucket into which the oop should be inserted. | |
624 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
625 // Be careful: is_perm might change from false to true. | |
626 // Thus, there might be a matching perm object in the table. | |
627 // If there is, this probe must find it. | |
628 if (key->is_perm() && _non_perm_count == 0) { | |
629 return emptyBucket; | |
630 } else if (key->is_instance()) { | |
1142 | 631 if (key->klass() == SystemDictionary::Class_klass()) { |
0 | 632 // class mirror instances are always perm |
633 return emptyBucket; | |
634 } | |
635 // fall through to probe | |
636 } else if (key->is_array()) { | |
637 // fall through to probe | |
638 } else { | |
639 // not an array or instance | |
640 return emptyBucket; | |
641 } | |
642 | |
643 ciObject* klass = get(key->klass()); | |
644 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; | |
645 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
646 if (is_equal(p, key)) break; | |
647 } | |
648 return (*bp); | |
649 } | |
650 | |
651 | |
652 | |
653 // ------------------------------------------------------------------ | |
654 // Code for for NonPermObject | |
655 // | |
656 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
657 assert(ciObjectFactory::is_initialized(), ""); | |
658 _object = object; | |
659 _next = bucket; | |
660 bucket = this; | |
661 } | |
662 | |
663 | |
664 | |
665 // ------------------------------------------------------------------ | |
666 // ciObjectFactory::insert_non_perm | |
667 // | |
668 // Insert a ciObject into the non-perm table. | |
669 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
670 assert(&where != &emptyBucket, "must not try to fill empty bucket"); | |
671 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
672 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
673 assert(find_non_perm(key) == p, "must find the same spot"); | |
674 ++_non_perm_count; | |
675 } | |
676 | |
677 // ------------------------------------------------------------------ | |
678 // ciObjectFactory::vm_symbol_at | |
679 // Get the ciSymbol corresponding to some index in vmSymbols. | |
680 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
681 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
682 return _shared_ci_symbols[index]; | |
683 } | |
684 | |
685 // ------------------------------------------------------------------ | |
686 // ciObjectFactory::print_contents_impl | |
687 void ciObjectFactory::print_contents_impl() { | |
688 int len = _ci_objects->length(); | |
689 tty->print_cr("ciObjectFactory (%d) oop contents:", len); | |
690 for (int i=0; i<len; i++) { | |
691 _ci_objects->at(i)->print(); | |
692 tty->cr(); | |
693 } | |
694 } | |
695 | |
696 // ------------------------------------------------------------------ | |
697 // ciObjectFactory::print_contents | |
698 void ciObjectFactory::print_contents() { | |
699 print(); | |
700 tty->cr(); | |
701 GUARDED_VM_ENTRY(print_contents_impl();) | |
702 } | |
703 | |
704 // ------------------------------------------------------------------ | |
705 // ciObjectFactory::print | |
706 // | |
707 // Print debugging information about the object factory | |
708 void ciObjectFactory::print() { | |
1602 | 709 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
0 | 710 _ci_objects->length(), _unloaded_methods->length(), |
1602 | 711 _unloaded_instances->length(), |
0 | 712 _unloaded_klasses->length()); |
713 } |