Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
| author | jrose |
|---|---|
| date | Wed, 09 Jun 2010 18:50:45 -0700 |
| parents | c18cbe5936b8 |
| children | 2d26b0046e0d f95d63e2154a |
| rev | line source |
|---|---|
| 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 } |