Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 3670:f198b24093f3
put back in thread transitions.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Fri, 18 Nov 2011 16:23:26 +0100 |
| parents | 53636e2c9d03 |
| children | 04b9a2566eec |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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/ciTypeArray.hpp" | |
| 42 #include "ci/ciTypeArrayKlass.hpp" | |
| 43 #include "ci/ciTypeArrayKlassKlass.hpp" | |
| 44 #include "ci/ciUtilities.hpp" | |
| 45 #include "classfile/systemDictionary.hpp" | |
| 46 #include "gc_interface/collectedHeap.inline.hpp" | |
| 47 #include "memory/allocation.inline.hpp" | |
| 48 #include "oops/oop.inline.hpp" | |
| 49 #include "oops/oop.inline2.hpp" | |
| 50 #include "runtime/fieldType.hpp" | |
| 0 | 51 |
| 52 // ciObjectFactory | |
| 53 // | |
| 54 // This class handles requests for the creation of new instances | |
| 55 // of ciObject and its subclasses. It contains a caching mechanism | |
| 56 // which ensures that for each oop, at most one ciObject is created. | |
| 57 // This invariant allows more efficient implementation of ciObject. | |
| 58 // | |
| 59 // Implementation note: the oop->ciObject mapping is represented as | |
| 60 // a table stored in an array. Even though objects are moved | |
| 61 // by the garbage collector, the compactor preserves their relative | |
| 62 // order; address comparison of oops (in perm space) is safe so long | |
| 63 // as we prohibit GC during our comparisons. We currently use binary | |
| 64 // search to find the oop in the table, and inserting a new oop | |
| 65 // into the table may be costly. If this cost ends up being | |
| 66 // problematic the underlying data structure can be switched to some | |
| 67 // sort of balanced binary tree. | |
| 68 | |
| 69 GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL; | |
| 70 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; | |
| 71 int ciObjectFactory::_shared_ident_limit = 0; | |
| 72 volatile bool ciObjectFactory::_initialized = false; | |
| 73 | |
| 74 | |
| 75 // ------------------------------------------------------------------ | |
| 76 // ciObjectFactory::ciObjectFactory | |
| 77 ciObjectFactory::ciObjectFactory(Arena* arena, | |
| 78 int expected_size) { | |
| 79 | |
| 80 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
| 81 _non_perm_bucket[i] = NULL; | |
| 82 } | |
| 83 _non_perm_count = 0; | |
| 84 | |
| 85 _next_ident = _shared_ident_limit; | |
| 86 _arena = arena; | |
| 87 _ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL); | |
| 88 | |
| 89 // If the shared ci objects exist append them to this factory's objects | |
| 90 | |
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91 /*if (_shared_ci_objects != NULL) { |
| 0 | 92 _ci_objects->appendAll(_shared_ci_objects); |
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93 }*/ |
| 0 | 94 |
| 95 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); | |
| 96 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); | |
| 1602 | 97 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
| 0 | 98 _return_addresses = |
| 99 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
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100 |
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101 _symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL); |
| 0 | 102 } |
| 103 | |
| 104 // ------------------------------------------------------------------ | |
| 105 // ciObjectFactory::ciObjectFactory | |
| 106 void ciObjectFactory::initialize() { | |
| 107 ASSERT_IN_VM; | |
| 108 JavaThread* thread = JavaThread::current(); | |
| 109 HandleMark handle_mark(thread); | |
| 110 | |
| 111 // This Arena is long lived and exists in the resource mark of the | |
| 112 // compiler thread that initializes the initial ciObjectFactory which | |
| 113 // creates the shared ciObjects that all later ciObjectFactories use. | |
| 114 Arena* arena = new Arena(); | |
| 115 ciEnv initial(arena); | |
| 116 ciEnv* env = ciEnv::current(); | |
| 117 env->_factory->init_shared_objects(); | |
| 118 | |
| 119 _initialized = true; | |
| 120 | |
| 121 } | |
| 122 | |
| 123 void ciObjectFactory::init_shared_objects() { | |
| 124 | |
| 125 _next_ident = 1; // start numbering CI objects at 1 | |
| 126 | |
| 127 { | |
| 128 // Create the shared symbols, but not in _shared_ci_objects. | |
| 129 int i; | |
| 130 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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131 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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132 assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping"); |
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133 ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i); |
| 0 | 134 init_ident_of(sym); |
| 135 _shared_ci_symbols[i] = sym; | |
| 136 } | |
| 137 #ifdef ASSERT | |
| 138 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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139 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
| 0 | 140 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); |
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141 assert(sym->get_symbol() == vmsym, "oop must match"); |
| 0 | 142 } |
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143 assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check"); |
| 0 | 144 #endif |
| 145 } | |
| 146 | |
| 147 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL); | |
| 148 | |
| 149 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 150 BasicType t = (BasicType)i; | |
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151 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) { |
| 0 | 152 ciType::_basic_types[t] = new (_arena) ciType(t); |
| 153 init_ident_of(ciType::_basic_types[t]); | |
| 154 } | |
| 155 } | |
| 156 | |
| 157 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
| 158 init_ident_of(ciEnv::_null_object_instance); | |
| 159 ciEnv::_method_klass_instance = | |
| 160 get(Universe::methodKlassObj())->as_method_klass(); | |
| 161 ciEnv::_klass_klass_instance = | |
| 162 get(Universe::klassKlassObj())->as_klass_klass(); | |
| 163 ciEnv::_instance_klass_klass_instance = | |
| 164 get(Universe::instanceKlassKlassObj()) | |
| 165 ->as_instance_klass_klass(); | |
| 166 ciEnv::_type_array_klass_klass_instance = | |
| 167 get(Universe::typeArrayKlassKlassObj()) | |
| 168 ->as_type_array_klass_klass(); | |
| 169 ciEnv::_obj_array_klass_klass_instance = | |
| 170 get(Universe::objArrayKlassKlassObj()) | |
| 171 ->as_obj_array_klass_klass(); | |
| 1142 | 172 |
| 173 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
| 174 if (SystemDictionary::name() != NULL) \ | |
| 175 ciEnv::_##name = get(SystemDictionary::name())->as_instance_klass(); | |
| 176 | |
| 177 WK_KLASSES_DO(WK_KLASS_DEFN) | |
| 178 #undef WK_KLASS_DEFN | |
| 0 | 179 |
| 180 for (int len = -1; len != _ci_objects->length(); ) { | |
| 181 len = _ci_objects->length(); | |
| 182 for (int i2 = 0; i2 < len; i2++) { | |
| 183 ciObject* obj = _ci_objects->at(i2); | |
| 184 if (obj->is_loaded() && obj->is_instance_klass()) { | |
| 185 obj->as_instance_klass()->compute_nonstatic_fields(); | |
| 186 } | |
| 187 } | |
| 188 } | |
| 189 | |
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190 ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
| 0 | 191 // Create dummy instanceKlass and objArrayKlass object and assign them idents |
| 192 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); | |
| 193 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
| 194 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
| 195 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
| 196 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
| 197 | |
| 198 get(Universe::boolArrayKlassObj()); | |
| 199 get(Universe::charArrayKlassObj()); | |
| 200 get(Universe::singleArrayKlassObj()); | |
| 201 get(Universe::doubleArrayKlassObj()); | |
| 202 get(Universe::byteArrayKlassObj()); | |
| 203 get(Universe::shortArrayKlassObj()); | |
| 204 get(Universe::intArrayKlassObj()); | |
| 205 get(Universe::longArrayKlassObj()); | |
| 206 | |
| 207 | |
| 208 | |
| 209 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
| 210 | |
| 211 // The shared_ident_limit is the first ident number that will | |
| 212 // be used for non-shared objects. That is, numbers less than | |
| 213 // this limit are permanently assigned to shared CI objects, | |
| 214 // while the higher numbers are recycled afresh by each new ciEnv. | |
| 215 | |
| 216 _shared_ident_limit = _next_ident; | |
| 217 _shared_ci_objects = _ci_objects; | |
| 218 } | |
| 219 | |
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220 |
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221 ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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222 /*vmSymbols::SID sid = vmSymbols::find_sid(key); |
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223 if (sid != vmSymbols::NO_SID) { |
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224 // do not pollute the main cache with it |
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225 ciSymbol* result = vm_symbol_at(sid); |
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226 assert(result != NULL, ""); |
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227 return result; |
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228 }*/ |
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229 |
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230 //assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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231 ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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232 _symbols->push(s); |
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233 return s; |
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234 } |
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235 |
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236 // Decrement the refcount when done on symbols referenced by this compilation. |
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237 void ciObjectFactory::remove_symbols() { |
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238 for (int i = 0; i < _symbols->length(); i++) { |
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239 ciSymbol* s = _symbols->at(i); |
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240 s->get_symbol()->decrement_refcount(); |
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241 } |
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242 // Since _symbols is resource allocated we're not allowed to delete it |
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243 // but it'll go away just the same. |
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244 } |
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245 |
| 0 | 246 // ------------------------------------------------------------------ |
| 247 // ciObjectFactory::get | |
| 248 // | |
| 249 // Get the ciObject corresponding to some oop. If the ciObject has | |
| 250 // already been created, it is returned. Otherwise, a new ciObject | |
| 251 // is created. | |
| 252 ciObject* ciObjectFactory::get(oop key) { | |
| 253 ASSERT_IN_VM; | |
| 254 | |
| 255 #ifdef ASSERT | |
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256 if (CIObjectFactoryVerify) { |
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257 oop last = NULL; |
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258 for (int j = 0; j< _ci_objects->length(); j++) { |
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259 oop o = _ci_objects->at(j)->get_oop(); |
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260 assert(last < o, "out of order"); |
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261 last = o; |
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262 } |
| 0 | 263 } |
| 264 #endif // ASSERT | |
| 265 int len = _ci_objects->length(); | |
| 266 int index = find(key, _ci_objects); | |
| 267 #ifdef ASSERT | |
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268 if (CIObjectFactoryVerify) { |
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269 for (int i=0; i<_ci_objects->length(); i++) { |
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270 if (_ci_objects->at(i)->get_oop() == key) { |
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271 assert(index == i, " bad lookup"); |
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272 } |
| 0 | 273 } |
| 274 } | |
| 275 #endif | |
| 276 if (!is_found_at(index, key, _ci_objects)) { | |
| 277 // Check in the non-perm area before putting it in the list. | |
| 278 NonPermObject* &bucket = find_non_perm(key); | |
| 279 if (bucket != NULL) { | |
| 280 return bucket->object(); | |
| 281 } | |
| 282 | |
| 283 // The ciObject does not yet exist. Create it and insert it | |
| 284 // into the cache. | |
| 285 Handle keyHandle(key); | |
| 286 ciObject* new_object = create_new_object(keyHandle()); | |
| 287 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); | |
| 288 init_ident_of(new_object); | |
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289 if (!new_object->is_perm()) { |
| 0 | 290 // Not a perm-space object. |
| 291 insert_non_perm(bucket, keyHandle(), new_object); | |
| 292 return new_object; | |
| 293 } | |
| 294 if (len != _ci_objects->length()) { | |
| 295 // creating the new object has recursively entered new objects | |
| 296 // into the table. We need to recompute our index. | |
| 297 index = find(keyHandle(), _ci_objects); | |
| 298 } | |
| 299 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert"); | |
| 300 insert(index, new_object, _ci_objects); | |
| 301 return new_object; | |
| 302 } | |
| 303 return _ci_objects->at(index); | |
| 304 } | |
| 305 | |
| 306 // ------------------------------------------------------------------ | |
| 307 // ciObjectFactory::create_new_object | |
| 308 // | |
| 309 // Create a new ciObject from an oop. | |
| 310 // | |
| 311 // Implementation note: this functionality could be virtual behavior | |
| 312 // of the oop itself. For now, we explicitly marshal the object. | |
| 313 ciObject* ciObjectFactory::create_new_object(oop o) { | |
| 314 EXCEPTION_CONTEXT; | |
| 315 | |
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316 if (o->is_klass()) { |
| 0 | 317 KlassHandle h_k(THREAD, (klassOop)o); |
| 318 Klass* k = ((klassOop)o)->klass_part(); | |
| 319 if (k->oop_is_instance()) { | |
| 320 return new (arena()) ciInstanceKlass(h_k); | |
| 321 } else if (k->oop_is_objArray()) { | |
| 322 return new (arena()) ciObjArrayKlass(h_k); | |
| 323 } else if (k->oop_is_typeArray()) { | |
| 324 return new (arena()) ciTypeArrayKlass(h_k); | |
| 325 } else if (k->oop_is_method()) { | |
| 326 return new (arena()) ciMethodKlass(h_k); | |
| 327 } else if (k->oop_is_klass()) { | |
| 328 if (k->oop_is_objArrayKlass()) { | |
| 329 return new (arena()) ciObjArrayKlassKlass(h_k); | |
| 330 } else if (k->oop_is_typeArrayKlass()) { | |
| 331 return new (arena()) ciTypeArrayKlassKlass(h_k); | |
| 332 } else if (k->oop_is_instanceKlass()) { | |
| 333 return new (arena()) ciInstanceKlassKlass(h_k); | |
| 334 } else { | |
| 335 assert(o == Universe::klassKlassObj(), "bad klassKlass"); | |
| 336 return new (arena()) ciKlassKlass(h_k); | |
| 337 } | |
| 338 } | |
| 339 } else if (o->is_method()) { | |
| 340 methodHandle h_m(THREAD, (methodOop)o); | |
| 341 return new (arena()) ciMethod(h_m); | |
| 342 } else if (o->is_methodData()) { | |
| 343 methodDataHandle h_md(THREAD, (methodDataOop)o); | |
| 344 return new (arena()) ciMethodData(h_md); | |
| 345 } else if (o->is_instance()) { | |
| 346 instanceHandle h_i(THREAD, (instanceOop)o); | |
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347 if (java_lang_invoke_CallSite::is_instance(o)) |
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348 return new (arena()) ciCallSite(h_i); |
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349 else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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350 return new (arena()) ciMethodHandle(h_i); |
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351 else |
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352 return new (arena()) ciInstance(h_i); |
| 0 | 353 } else if (o->is_objArray()) { |
| 354 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
| 355 return new (arena()) ciObjArray(h_oa); | |
| 356 } else if (o->is_typeArray()) { | |
| 357 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
| 358 return new (arena()) ciTypeArray(h_ta); | |
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359 } else if (o->is_constantPoolCache()) { |
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360 constantPoolCacheHandle h_cpc(THREAD, (constantPoolCacheOop) o); |
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361 return new (arena()) ciCPCache(h_cpc); |
| 0 | 362 } |
| 363 | |
| 364 // The oop is of some type not supported by the compiler interface. | |
| 365 ShouldNotReachHere(); | |
| 366 return NULL; | |
| 367 } | |
| 368 | |
| 369 //------------------------------------------------------------------ | |
| 370 // ciObjectFactory::get_unloaded_method | |
| 371 // | |
| 372 // Get the ciMethod representing an unloaded/unfound method. | |
| 373 // | |
| 374 // Implementation note: unloaded methods are currently stored in | |
| 375 // an unordered array, requiring a linear-time lookup for each | |
| 376 // unloaded method. This may need to change. | |
| 377 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
| 378 ciSymbol* name, | |
| 379 ciSymbol* signature) { | |
| 380 for (int i=0; i<_unloaded_methods->length(); i++) { | |
| 381 ciMethod* entry = _unloaded_methods->at(i); | |
| 382 if (entry->holder()->equals(holder) && | |
| 383 entry->name()->equals(name) && | |
| 384 entry->signature()->as_symbol()->equals(signature)) { | |
| 385 // We've found a match. | |
| 386 return entry; | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 // This is a new unloaded method. Create it and stick it in | |
| 391 // the cache. | |
| 392 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature); | |
| 393 | |
| 394 init_ident_of(new_method); | |
| 395 _unloaded_methods->append(new_method); | |
| 396 | |
| 397 return new_method; | |
| 398 } | |
| 399 | |
| 400 //------------------------------------------------------------------ | |
| 401 // ciObjectFactory::get_unloaded_klass | |
| 402 // | |
| 403 // Get a ciKlass representing an unloaded klass. | |
| 404 // | |
| 405 // Implementation note: unloaded klasses are currently stored in | |
| 406 // an unordered array, requiring a linear-time lookup for each | |
| 407 // unloaded klass. This may need to change. | |
| 408 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
| 409 ciSymbol* name, | |
| 410 bool create_if_not_found) { | |
| 411 EXCEPTION_CONTEXT; | |
| 412 oop loader = NULL; | |
| 413 oop domain = NULL; | |
| 414 if (accessing_klass != NULL) { | |
| 415 loader = accessing_klass->loader(); | |
| 416 domain = accessing_klass->protection_domain(); | |
| 417 } | |
| 418 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
| 419 ciKlass* entry = _unloaded_klasses->at(i); | |
| 420 if (entry->name()->equals(name) && | |
| 421 entry->loader() == loader && | |
| 422 entry->protection_domain() == domain) { | |
| 423 // We've found a match. | |
| 424 return entry; | |
| 425 } | |
| 426 } | |
| 427 | |
| 428 if (!create_if_not_found) | |
| 429 return NULL; | |
| 430 | |
| 431 // This is a new unloaded klass. Create it and stick it in | |
| 432 // the cache. | |
| 433 ciKlass* new_klass = NULL; | |
| 434 | |
| 435 // Two cases: this is an unloaded objArrayKlass or an | |
| 436 // unloaded instanceKlass. Deal with both. | |
| 437 if (name->byte_at(0) == '[') { | |
| 438 // Decompose the name.' | |
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439 FieldArrayInfo fd; |
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440 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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441 fd, THREAD); |
| 0 | 442 if (HAS_PENDING_EXCEPTION) { |
| 443 CLEAR_PENDING_EXCEPTION; | |
| 444 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
| 445 return ciEnv::_unloaded_ciobjarrayklass; | |
| 446 } | |
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447 int dimension = fd.dimension(); |
| 0 | 448 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
| 449 ciKlass* element_klass = NULL; | |
| 450 if (element_type == T_OBJECT) { | |
| 451 ciEnv *env = CURRENT_THREAD_ENV; | |
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452 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
| 0 | 453 element_klass = |
| 454 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
| 455 } else { | |
| 456 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
| 457 | |
| 458 // The type array itself takes care of one of the dimensions. | |
| 459 dimension--; | |
| 460 | |
| 461 // The element klass is a typeArrayKlass. | |
| 462 element_klass = ciTypeArrayKlass::make(element_type); | |
| 463 } | |
| 464 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
| 465 } else { | |
| 466 jobject loader_handle = NULL; | |
| 467 jobject domain_handle = NULL; | |
| 468 if (accessing_klass != NULL) { | |
| 469 loader_handle = accessing_klass->loader_handle(); | |
| 470 domain_handle = accessing_klass->protection_domain_handle(); | |
| 471 } | |
| 472 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
| 473 } | |
| 474 init_ident_of(new_klass); | |
| 475 _unloaded_klasses->append(new_klass); | |
| 476 | |
| 477 return new_klass; | |
| 478 } | |
| 479 | |
| 1602 | 480 |
| 481 //------------------------------------------------------------------ | |
| 482 // ciObjectFactory::get_unloaded_instance | |
| 483 // | |
| 484 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
| 485 // | |
| 486 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
| 487 for (int i=0; i<_unloaded_instances->length(); i++) { | |
| 488 ciInstance* entry = _unloaded_instances->at(i); | |
| 489 if (entry->klass()->equals(instance_klass)) { | |
| 490 // We've found a match. | |
| 491 return entry; | |
| 492 } | |
| 493 } | |
| 494 | |
| 495 // This is a new unloaded instance. Create it and stick it in | |
| 496 // the cache. | |
| 497 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
| 498 | |
| 499 init_ident_of(new_instance); | |
| 500 _unloaded_instances->append(new_instance); | |
| 501 | |
| 502 // make sure it looks the way we want: | |
| 503 assert(!new_instance->is_loaded(), ""); | |
| 504 assert(new_instance->klass() == instance_klass, ""); | |
| 505 | |
| 506 return new_instance; | |
| 507 } | |
| 508 | |
| 509 | |
| 510 //------------------------------------------------------------------ | |
| 511 // ciObjectFactory::get_unloaded_klass_mirror | |
| 512 // | |
| 513 // Get a ciInstance representing an unresolved klass mirror. | |
| 514 // | |
| 515 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 516 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
| 517 assert(ciEnv::_Class_klass != NULL, ""); | |
| 518 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
| 519 } | |
| 520 | |
| 521 //------------------------------------------------------------------ | |
| 522 // ciObjectFactory::get_unloaded_method_handle_constant | |
| 523 // | |
| 524 // Get a ciInstance representing an unresolved method handle constant. | |
| 525 // | |
| 526 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 527 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
| 528 ciSymbol* name, | |
| 529 ciSymbol* signature, | |
| 530 int ref_kind) { | |
| 531 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
| 532 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
| 533 } | |
| 534 | |
| 535 //------------------------------------------------------------------ | |
| 536 // ciObjectFactory::get_unloaded_method_type_constant | |
| 537 // | |
| 538 // Get a ciInstance representing an unresolved method type constant. | |
| 539 // | |
| 540 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 541 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
| 542 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
| 543 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
| 544 } | |
| 545 | |
| 546 | |
| 547 | |
| 0 | 548 //------------------------------------------------------------------ |
| 549 // ciObjectFactory::get_empty_methodData | |
| 550 // | |
| 551 // Get the ciMethodData representing the methodData for a method with | |
| 552 // none. | |
| 553 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
| 554 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
| 555 init_ident_of(new_methodData); | |
| 556 return new_methodData; | |
| 557 } | |
| 558 | |
| 559 //------------------------------------------------------------------ | |
| 560 // ciObjectFactory::get_return_address | |
| 561 // | |
| 562 // Get a ciReturnAddress for a specified bci. | |
| 563 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
| 564 for (int i=0; i<_return_addresses->length(); i++) { | |
| 565 ciReturnAddress* entry = _return_addresses->at(i); | |
| 566 if (entry->bci() == bci) { | |
| 567 // We've found a match. | |
| 568 return entry; | |
| 569 } | |
| 570 } | |
| 571 | |
| 572 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
| 573 init_ident_of(new_ret_addr); | |
| 574 _return_addresses->append(new_ret_addr); | |
| 575 return new_ret_addr; | |
| 576 } | |
| 577 | |
| 578 // ------------------------------------------------------------------ | |
| 579 // ciObjectFactory::init_ident_of | |
| 580 void ciObjectFactory::init_ident_of(ciObject* obj) { | |
| 581 obj->set_ident(_next_ident++); | |
| 582 } | |
| 583 | |
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584 void ciObjectFactory::init_ident_of(ciSymbol* obj) { |
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585 obj->set_ident(_next_ident++); |
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586 } |
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587 |
| 0 | 588 |
| 589 // ------------------------------------------------------------------ | |
| 590 // ciObjectFactory::find | |
| 591 // | |
| 592 // Use binary search to find the position of this oop in the cache. | |
| 593 // If there is no entry in the cache corresponding to this oop, return | |
| 594 // the position at which the oop should be inserted. | |
| 595 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) { | |
| 596 int min = 0; | |
| 597 int max = objects->length()-1; | |
| 598 | |
| 599 // print_contents(); | |
| 600 | |
| 601 while (max >= min) { | |
| 602 int mid = (max + min) / 2; | |
| 603 oop value = objects->at(mid)->get_oop(); | |
| 604 if (value < key) { | |
| 605 min = mid + 1; | |
| 606 } else if (value > key) { | |
| 607 max = mid - 1; | |
| 608 } else { | |
| 609 return mid; | |
| 610 } | |
| 611 } | |
| 612 return min; | |
| 613 } | |
| 614 | |
| 615 // ------------------------------------------------------------------ | |
| 616 // ciObjectFactory::is_found_at | |
| 617 // | |
| 618 // Verify that the binary seach found the given key. | |
| 619 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) { | |
| 620 return (index < objects->length() && | |
| 621 objects->at(index)->get_oop() == key); | |
| 622 } | |
| 623 | |
| 624 | |
| 625 // ------------------------------------------------------------------ | |
| 626 // ciObjectFactory::insert | |
| 627 // | |
| 628 // Insert a ciObject into the table at some index. | |
| 629 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) { | |
| 630 int len = objects->length(); | |
| 631 if (len == index) { | |
| 632 objects->append(obj); | |
| 633 } else { | |
| 634 objects->append(objects->at(len-1)); | |
| 635 int pos; | |
| 636 for (pos = len-2; pos >= index; pos--) { | |
| 637 objects->at_put(pos+1,objects->at(pos)); | |
| 638 } | |
| 639 objects->at_put(index, obj); | |
| 640 } | |
| 641 #ifdef ASSERT | |
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642 if (CIObjectFactoryVerify) { |
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643 oop last = NULL; |
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644 for (int j = 0; j< objects->length(); j++) { |
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645 oop o = objects->at(j)->get_oop(); |
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646 assert(last < o, "out of order"); |
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647 last = o; |
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648 } |
| 0 | 649 } |
| 650 #endif // ASSERT | |
| 651 } | |
| 652 | |
| 653 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
| 654 | |
| 655 // ------------------------------------------------------------------ | |
| 656 // ciObjectFactory::find_non_perm | |
| 657 // | |
| 658 // Use a small hash table, hashed on the klass of the key. | |
| 659 // If there is no entry in the cache corresponding to this oop, return | |
| 660 // the null tail of the bucket into which the oop should be inserted. | |
| 661 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
| 662 // Be careful: is_perm might change from false to true. | |
| 663 // Thus, there might be a matching perm object in the table. | |
| 664 // If there is, this probe must find it. | |
| 665 if (key->is_perm() && _non_perm_count == 0) { | |
| 666 return emptyBucket; | |
| 667 } else if (key->is_instance()) { | |
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668 if (key->klass() == SystemDictionary::Class_klass() && JavaObjectsInPerm) { |
| 0 | 669 // class mirror instances are always perm |
| 670 return emptyBucket; | |
| 671 } | |
| 672 // fall through to probe | |
| 673 } else if (key->is_array()) { | |
| 674 // fall through to probe | |
| 675 } else { | |
| 676 // not an array or instance | |
| 677 return emptyBucket; | |
| 678 } | |
| 679 | |
| 680 ciObject* klass = get(key->klass()); | |
| 681 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; | |
| 682 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
| 683 if (is_equal(p, key)) break; | |
| 684 } | |
| 685 return (*bp); | |
| 686 } | |
| 687 | |
| 688 | |
| 689 | |
| 690 // ------------------------------------------------------------------ | |
| 691 // Code for for NonPermObject | |
| 692 // | |
| 693 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
| 694 assert(ciObjectFactory::is_initialized(), ""); | |
| 695 _object = object; | |
| 696 _next = bucket; | |
| 697 bucket = this; | |
| 698 } | |
| 699 | |
| 700 | |
| 701 | |
| 702 // ------------------------------------------------------------------ | |
| 703 // ciObjectFactory::insert_non_perm | |
| 704 // | |
| 705 // Insert a ciObject into the non-perm table. | |
| 706 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
| 707 assert(&where != &emptyBucket, "must not try to fill empty bucket"); | |
| 708 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
| 709 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
| 710 assert(find_non_perm(key) == p, "must find the same spot"); | |
| 711 ++_non_perm_count; | |
| 712 } | |
| 713 | |
| 714 // ------------------------------------------------------------------ | |
| 715 // ciObjectFactory::vm_symbol_at | |
| 716 // Get the ciSymbol corresponding to some index in vmSymbols. | |
| 717 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
| 718 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
| 719 return _shared_ci_symbols[index]; | |
| 720 } | |
| 721 | |
| 722 // ------------------------------------------------------------------ | |
| 723 // ciObjectFactory::print_contents_impl | |
| 724 void ciObjectFactory::print_contents_impl() { | |
| 725 int len = _ci_objects->length(); | |
| 726 tty->print_cr("ciObjectFactory (%d) oop contents:", len); | |
| 727 for (int i=0; i<len; i++) { | |
| 728 _ci_objects->at(i)->print(); | |
| 729 tty->cr(); | |
| 730 } | |
| 731 } | |
| 732 | |
| 733 // ------------------------------------------------------------------ | |
| 734 // ciObjectFactory::print_contents | |
| 735 void ciObjectFactory::print_contents() { | |
| 736 print(); | |
| 737 tty->cr(); | |
| 738 GUARDED_VM_ENTRY(print_contents_impl();) | |
| 739 } | |
| 740 | |
| 741 // ------------------------------------------------------------------ | |
| 742 // ciObjectFactory::print | |
| 743 // | |
| 744 // Print debugging information about the object factory | |
| 745 void ciObjectFactory::print() { | |
| 1602 | 746 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
| 0 | 747 _ci_objects->length(), _unloaded_methods->length(), |
| 1602 | 748 _unloaded_instances->length(), |
| 0 | 749 _unloaded_klasses->length()); |
| 750 } |