Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
| author | mikael |
|---|---|
| date | Tue, 24 Dec 2013 11:48:39 -0800 |
| parents | f98f5d48f511 |
| children | d8041d695d19 2c6ef90f030a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, 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/ciCallSite.hpp" | |
| 27 #include "ci/ciInstance.hpp" | |
| 28 #include "ci/ciInstanceKlass.hpp" | |
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29 #include "ci/ciMemberName.hpp" |
| 1972 | 30 #include "ci/ciMethod.hpp" |
| 31 #include "ci/ciMethodData.hpp" | |
| 32 #include "ci/ciMethodHandle.hpp" | |
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33 #include "ci/ciMethodType.hpp" |
| 1972 | 34 #include "ci/ciNullObject.hpp" |
| 35 #include "ci/ciObjArray.hpp" | |
| 36 #include "ci/ciObjArrayKlass.hpp" | |
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37 #include "ci/ciObject.hpp" |
| 1972 | 38 #include "ci/ciObjectFactory.hpp" |
| 39 #include "ci/ciSymbol.hpp" | |
| 40 #include "ci/ciTypeArray.hpp" | |
| 41 #include "ci/ciTypeArrayKlass.hpp" | |
| 42 #include "ci/ciUtilities.hpp" | |
| 43 #include "classfile/systemDictionary.hpp" | |
| 44 #include "gc_interface/collectedHeap.inline.hpp" | |
| 45 #include "memory/allocation.inline.hpp" | |
| 46 #include "oops/oop.inline.hpp" | |
| 47 #include "oops/oop.inline2.hpp" | |
| 48 #include "runtime/fieldType.hpp" | |
| 0 | 49 |
| 50 // ciObjectFactory | |
| 51 // | |
| 52 // This class handles requests for the creation of new instances | |
| 53 // of ciObject and its subclasses. It contains a caching mechanism | |
| 54 // which ensures that for each oop, at most one ciObject is created. | |
| 55 // This invariant allows more efficient implementation of ciObject. | |
| 56 // | |
| 57 // Implementation note: the oop->ciObject mapping is represented as | |
| 58 // a table stored in an array. Even though objects are moved | |
| 59 // by the garbage collector, the compactor preserves their relative | |
| 60 // order; address comparison of oops (in perm space) is safe so long | |
| 61 // as we prohibit GC during our comparisons. We currently use binary | |
| 62 // search to find the oop in the table, and inserting a new oop | |
| 63 // into the table may be costly. If this cost ends up being | |
| 64 // problematic the underlying data structure can be switched to some | |
| 65 // sort of balanced binary tree. | |
| 66 | |
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67 GrowableArray<ciMetadata*>* ciObjectFactory::_shared_ci_metadata = NULL; |
| 0 | 68 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; |
| 69 int ciObjectFactory::_shared_ident_limit = 0; | |
| 70 volatile bool ciObjectFactory::_initialized = false; | |
| 71 | |
| 72 | |
| 73 // ------------------------------------------------------------------ | |
| 74 // ciObjectFactory::ciObjectFactory | |
| 75 ciObjectFactory::ciObjectFactory(Arena* arena, | |
| 76 int expected_size) { | |
| 77 | |
| 78 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
| 79 _non_perm_bucket[i] = NULL; | |
| 80 } | |
| 81 _non_perm_count = 0; | |
| 82 | |
| 83 _next_ident = _shared_ident_limit; | |
| 84 _arena = arena; | |
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85 _ci_metadata = new (arena) GrowableArray<ciMetadata*>(arena, expected_size, 0, NULL); |
| 0 | 86 |
| 87 // If the shared ci objects exist append them to this factory's objects | |
| 88 | |
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89 if (_shared_ci_metadata != NULL) { |
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90 _ci_metadata->appendAll(_shared_ci_metadata); |
| 0 | 91 } |
| 92 | |
| 93 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); | |
| 94 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); | |
| 1602 | 95 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
| 0 | 96 _return_addresses = |
| 97 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
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98 |
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99 _symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL); |
| 0 | 100 } |
| 101 | |
| 102 // ------------------------------------------------------------------ | |
| 103 // ciObjectFactory::ciObjectFactory | |
| 104 void ciObjectFactory::initialize() { | |
| 105 ASSERT_IN_VM; | |
| 106 JavaThread* thread = JavaThread::current(); | |
| 107 HandleMark handle_mark(thread); | |
| 108 | |
| 109 // This Arena is long lived and exists in the resource mark of the | |
| 110 // compiler thread that initializes the initial ciObjectFactory which | |
| 111 // creates the shared ciObjects that all later ciObjectFactories use. | |
| 6197 | 112 Arena* arena = new (mtCompiler) Arena(); |
| 0 | 113 ciEnv initial(arena); |
| 114 ciEnv* env = ciEnv::current(); | |
| 115 env->_factory->init_shared_objects(); | |
| 116 | |
| 117 _initialized = true; | |
| 118 | |
| 119 } | |
| 120 | |
| 121 void ciObjectFactory::init_shared_objects() { | |
| 122 | |
| 123 _next_ident = 1; // start numbering CI objects at 1 | |
| 124 | |
| 125 { | |
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126 // Create the shared symbols, but not in _shared_ci_metadata. |
| 0 | 127 int i; |
| 128 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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129 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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130 assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping"); |
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131 ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i); |
| 0 | 132 init_ident_of(sym); |
| 133 _shared_ci_symbols[i] = sym; | |
| 134 } | |
| 135 #ifdef ASSERT | |
| 136 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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137 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
| 0 | 138 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); |
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139 assert(sym->get_symbol() == vmsym, "oop must match"); |
| 0 | 140 } |
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141 assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check"); |
| 0 | 142 #endif |
| 143 } | |
| 144 | |
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145 _ci_metadata = new (_arena) GrowableArray<ciMetadata*>(_arena, 64, 0, NULL); |
| 0 | 146 |
| 147 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 148 BasicType t = (BasicType)i; | |
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149 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP && t != T_NARROWKLASS) { |
| 0 | 150 ciType::_basic_types[t] = new (_arena) ciType(t); |
| 151 init_ident_of(ciType::_basic_types[t]); | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
| 156 init_ident_of(ciEnv::_null_object_instance); | |
| 1142 | 157 |
| 158 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
| 159 if (SystemDictionary::name() != NULL) \ | |
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160 ciEnv::_##name = get_metadata(SystemDictionary::name())->as_instance_klass(); |
| 1142 | 161 |
| 162 WK_KLASSES_DO(WK_KLASS_DEFN) | |
| 163 #undef WK_KLASS_DEFN | |
| 0 | 164 |
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165 for (int len = -1; len != _ci_metadata->length(); ) { |
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166 len = _ci_metadata->length(); |
| 0 | 167 for (int i2 = 0; i2 < len; i2++) { |
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168 ciMetadata* obj = _ci_metadata->at(i2); |
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169 assert (obj->is_metadata(), "what else would it be?"); |
| 0 | 170 if (obj->is_loaded() && obj->is_instance_klass()) { |
| 171 obj->as_instance_klass()->compute_nonstatic_fields(); | |
| 172 } | |
| 173 } | |
| 174 } | |
| 175 | |
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176 ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
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177 // Create dummy InstanceKlass and ObjArrayKlass object and assign them idents |
| 0 | 178 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); |
| 179 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
| 180 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
| 181 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
| 182 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
| 183 | |
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184 get_metadata(Universe::boolArrayKlassObj()); |
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185 get_metadata(Universe::charArrayKlassObj()); |
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186 get_metadata(Universe::singleArrayKlassObj()); |
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187 get_metadata(Universe::doubleArrayKlassObj()); |
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188 get_metadata(Universe::byteArrayKlassObj()); |
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189 get_metadata(Universe::shortArrayKlassObj()); |
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190 get_metadata(Universe::intArrayKlassObj()); |
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191 get_metadata(Universe::longArrayKlassObj()); |
| 0 | 192 |
| 193 | |
| 194 | |
| 195 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
| 196 | |
| 197 // The shared_ident_limit is the first ident number that will | |
| 198 // be used for non-shared objects. That is, numbers less than | |
| 199 // this limit are permanently assigned to shared CI objects, | |
| 200 // while the higher numbers are recycled afresh by each new ciEnv. | |
| 201 | |
| 202 _shared_ident_limit = _next_ident; | |
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203 _shared_ci_metadata = _ci_metadata; |
| 0 | 204 } |
| 205 | |
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206 |
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207 ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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208 vmSymbols::SID sid = vmSymbols::find_sid(key); |
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209 if (sid != vmSymbols::NO_SID) { |
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210 // do not pollute the main cache with it |
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211 return vm_symbol_at(sid); |
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212 } |
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213 |
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214 assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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215 ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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216 _symbols->push(s); |
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217 return s; |
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218 } |
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219 |
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220 // Decrement the refcount when done on symbols referenced by this compilation. |
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221 void ciObjectFactory::remove_symbols() { |
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222 for (int i = 0; i < _symbols->length(); i++) { |
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223 ciSymbol* s = _symbols->at(i); |
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224 s->get_symbol()->decrement_refcount(); |
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225 } |
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226 // Since _symbols is resource allocated we're not allowed to delete it |
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227 // but it'll go away just the same. |
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228 } |
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229 |
| 0 | 230 // ------------------------------------------------------------------ |
| 231 // ciObjectFactory::get | |
| 232 // | |
| 233 // Get the ciObject corresponding to some oop. If the ciObject has | |
| 234 // already been created, it is returned. Otherwise, a new ciObject | |
| 235 // is created. | |
| 236 ciObject* ciObjectFactory::get(oop key) { | |
| 237 ASSERT_IN_VM; | |
| 238 | |
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239 assert(key == NULL || Universe::heap()->is_in_reserved(key), "must be"); |
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240 |
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241 NonPermObject* &bucket = find_non_perm(key); |
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242 if (bucket != NULL) { |
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243 return bucket->object(); |
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244 } |
| 0 | 245 |
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246 // The ciObject does not yet exist. Create it and insert it |
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247 // into the cache. |
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248 Handle keyHandle(key); |
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249 ciObject* new_object = create_new_object(keyHandle()); |
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250 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); |
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251 init_ident_of(new_object); |
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252 assert(Universe::heap()->is_in_reserved(new_object->get_oop()), "must be"); |
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253 |
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254 // Not a perm-space object. |
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255 insert_non_perm(bucket, keyHandle(), new_object); |
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256 return new_object; |
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257 } |
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258 |
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259 // ------------------------------------------------------------------ |
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260 // ciObjectFactory::get |
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261 // |
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262 // Get the ciObject corresponding to some oop. If the ciObject has |
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263 // already been created, it is returned. Otherwise, a new ciObject |
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264 // is created. |
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265 ciMetadata* ciObjectFactory::get_metadata(Metadata* key) { |
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266 ASSERT_IN_VM; |
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267 |
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268 #ifdef ASSERT |
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269 if (CIObjectFactoryVerify) { |
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270 Metadata* last = NULL; |
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271 for (int j = 0; j< _ci_metadata->length(); j++) { |
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272 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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273 assert(last < o, "out of order"); |
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274 last = o; |
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275 } |
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276 } |
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277 #endif // ASSERT |
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278 int len = _ci_metadata->length(); |
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279 int index = find(key, _ci_metadata); |
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280 #ifdef ASSERT |
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281 if (CIObjectFactoryVerify) { |
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282 for (int i=0; i<_ci_metadata->length(); i++) { |
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283 if (_ci_metadata->at(i)->constant_encoding() == key) { |
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284 assert(index == i, " bad lookup"); |
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285 } |
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286 } |
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287 } |
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288 #endif |
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289 if (!is_found_at(index, key, _ci_metadata)) { |
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290 // The ciObject does not yet exist. Create it and insert it |
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291 // into the cache. |
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292 ciMetadata* new_object = create_new_object(key); |
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293 init_ident_of(new_object); |
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294 assert(new_object->is_metadata(), "must be"); |
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295 |
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296 if (len != _ci_metadata->length()) { |
| 0 | 297 // creating the new object has recursively entered new objects |
| 298 // into the table. We need to recompute our index. | |
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299 index = find(key, _ci_metadata); |
| 0 | 300 } |
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301 assert(!is_found_at(index, key, _ci_metadata), "no double insert"); |
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302 insert(index, new_object, _ci_metadata); |
| 0 | 303 return new_object; |
| 304 } | |
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305 return _ci_metadata->at(index)->as_metadata(); |
| 0 | 306 } |
| 307 | |
| 308 // ------------------------------------------------------------------ | |
| 309 // ciObjectFactory::create_new_object | |
| 310 // | |
| 311 // Create a new ciObject from an oop. | |
| 312 // | |
| 313 // Implementation note: this functionality could be virtual behavior | |
| 314 // of the oop itself. For now, we explicitly marshal the object. | |
| 315 ciObject* ciObjectFactory::create_new_object(oop o) { | |
| 316 EXCEPTION_CONTEXT; | |
| 317 | |
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318 if (o->is_instance()) { |
| 0 | 319 instanceHandle h_i(THREAD, (instanceOop)o); |
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320 if (java_lang_invoke_CallSite::is_instance(o)) |
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321 return new (arena()) ciCallSite(h_i); |
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322 else if (java_lang_invoke_MemberName::is_instance(o)) |
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323 return new (arena()) ciMemberName(h_i); |
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324 else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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325 return new (arena()) ciMethodHandle(h_i); |
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326 else if (java_lang_invoke_MethodType::is_instance(o)) |
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327 return new (arena()) ciMethodType(h_i); |
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328 else |
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329 return new (arena()) ciInstance(h_i); |
| 0 | 330 } else if (o->is_objArray()) { |
| 331 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
| 332 return new (arena()) ciObjArray(h_oa); | |
| 333 } else if (o->is_typeArray()) { | |
| 334 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
| 335 return new (arena()) ciTypeArray(h_ta); | |
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336 } |
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337 |
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338 // The oop is of some type not supported by the compiler interface. |
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339 ShouldNotReachHere(); |
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340 return NULL; |
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341 } |
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342 |
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343 // ------------------------------------------------------------------ |
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344 // ciObjectFactory::create_new_object |
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345 // |
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346 // Create a new ciObject from a Metadata*. |
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347 // |
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348 // Implementation note: this functionality could be virtual behavior |
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349 // of the oop itself. For now, we explicitly marshal the object. |
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350 ciMetadata* ciObjectFactory::create_new_object(Metadata* o) { |
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351 EXCEPTION_CONTEXT; |
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352 |
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353 if (o->is_klass()) { |
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354 KlassHandle h_k(THREAD, (Klass*)o); |
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355 Klass* k = (Klass*)o; |
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356 if (k->oop_is_instance()) { |
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357 return new (arena()) ciInstanceKlass(h_k); |
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358 } else if (k->oop_is_objArray()) { |
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359 return new (arena()) ciObjArrayKlass(h_k); |
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360 } else if (k->oop_is_typeArray()) { |
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361 return new (arena()) ciTypeArrayKlass(h_k); |
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362 } |
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363 } else if (o->is_method()) { |
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364 methodHandle h_m(THREAD, (Method*)o); |
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365 return new (arena()) ciMethod(h_m); |
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366 } else if (o->is_methodData()) { |
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367 // Hold methodHandle alive - might not be necessary ??? |
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368 methodHandle h_m(THREAD, ((MethodData*)o)->method()); |
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369 return new (arena()) ciMethodData((MethodData*)o); |
| 0 | 370 } |
| 371 | |
| 372 // The oop is of some type not supported by the compiler interface. | |
| 373 ShouldNotReachHere(); | |
| 374 return NULL; | |
| 375 } | |
| 376 | |
| 377 //------------------------------------------------------------------ | |
| 378 // ciObjectFactory::get_unloaded_method | |
| 379 // | |
| 380 // Get the ciMethod representing an unloaded/unfound method. | |
| 381 // | |
| 382 // Implementation note: unloaded methods are currently stored in | |
| 383 // an unordered array, requiring a linear-time lookup for each | |
| 384 // unloaded method. This may need to change. | |
| 385 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
| 386 ciSymbol* name, | |
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387 ciSymbol* signature, |
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388 ciInstanceKlass* accessor) { |
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389 ciSignature* that = NULL; |
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390 for (int i = 0; i < _unloaded_methods->length(); i++) { |
| 0 | 391 ciMethod* entry = _unloaded_methods->at(i); |
| 392 if (entry->holder()->equals(holder) && | |
| 393 entry->name()->equals(name) && | |
| 394 entry->signature()->as_symbol()->equals(signature)) { | |
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395 // Short-circuit slow resolve. |
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396 if (entry->signature()->accessing_klass() == accessor) { |
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397 // We've found a match. |
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398 return entry; |
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399 } else { |
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400 // Lazily create ciSignature |
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401 if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
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402 if (entry->signature()->equals(that)) { |
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403 // We've found a match. |
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404 return entry; |
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405 } |
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406 } |
| 0 | 407 } |
| 408 } | |
| 409 | |
| 410 // This is a new unloaded method. Create it and stick it in | |
| 411 // the cache. | |
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412 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
| 0 | 413 |
| 414 init_ident_of(new_method); | |
| 415 _unloaded_methods->append(new_method); | |
| 416 | |
| 417 return new_method; | |
| 418 } | |
| 419 | |
| 420 //------------------------------------------------------------------ | |
| 421 // ciObjectFactory::get_unloaded_klass | |
| 422 // | |
| 423 // Get a ciKlass representing an unloaded klass. | |
| 424 // | |
| 425 // Implementation note: unloaded klasses are currently stored in | |
| 426 // an unordered array, requiring a linear-time lookup for each | |
| 427 // unloaded klass. This may need to change. | |
| 428 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
| 429 ciSymbol* name, | |
| 430 bool create_if_not_found) { | |
| 431 EXCEPTION_CONTEXT; | |
| 432 oop loader = NULL; | |
| 433 oop domain = NULL; | |
| 434 if (accessing_klass != NULL) { | |
| 435 loader = accessing_klass->loader(); | |
| 436 domain = accessing_klass->protection_domain(); | |
| 437 } | |
| 438 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
| 439 ciKlass* entry = _unloaded_klasses->at(i); | |
| 440 if (entry->name()->equals(name) && | |
| 441 entry->loader() == loader && | |
| 442 entry->protection_domain() == domain) { | |
| 443 // We've found a match. | |
| 444 return entry; | |
| 445 } | |
| 446 } | |
| 447 | |
| 448 if (!create_if_not_found) | |
| 449 return NULL; | |
| 450 | |
| 451 // This is a new unloaded klass. Create it and stick it in | |
| 452 // the cache. | |
| 453 ciKlass* new_klass = NULL; | |
| 454 | |
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455 // Two cases: this is an unloaded ObjArrayKlass or an |
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456 // unloaded InstanceKlass. Deal with both. |
| 0 | 457 if (name->byte_at(0) == '[') { |
| 458 // Decompose the name.' | |
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459 FieldArrayInfo fd; |
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460 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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461 fd, THREAD); |
| 0 | 462 if (HAS_PENDING_EXCEPTION) { |
| 463 CLEAR_PENDING_EXCEPTION; | |
| 464 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
| 465 return ciEnv::_unloaded_ciobjarrayklass; | |
| 466 } | |
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467 int dimension = fd.dimension(); |
| 0 | 468 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
| 469 ciKlass* element_klass = NULL; | |
| 470 if (element_type == T_OBJECT) { | |
| 471 ciEnv *env = CURRENT_THREAD_ENV; | |
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472 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
| 0 | 473 element_klass = |
| 474 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
| 475 } else { | |
| 476 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
| 477 | |
| 478 // The type array itself takes care of one of the dimensions. | |
| 479 dimension--; | |
| 480 | |
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481 // The element klass is a TypeArrayKlass. |
| 0 | 482 element_klass = ciTypeArrayKlass::make(element_type); |
| 483 } | |
| 484 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
| 485 } else { | |
| 486 jobject loader_handle = NULL; | |
| 487 jobject domain_handle = NULL; | |
| 488 if (accessing_klass != NULL) { | |
| 489 loader_handle = accessing_klass->loader_handle(); | |
| 490 domain_handle = accessing_klass->protection_domain_handle(); | |
| 491 } | |
| 492 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
| 493 } | |
| 494 init_ident_of(new_klass); | |
| 495 _unloaded_klasses->append(new_klass); | |
| 496 | |
| 497 return new_klass; | |
| 498 } | |
| 499 | |
| 1602 | 500 |
| 501 //------------------------------------------------------------------ | |
| 502 // ciObjectFactory::get_unloaded_instance | |
| 503 // | |
| 504 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
| 505 // | |
| 506 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
| 507 for (int i=0; i<_unloaded_instances->length(); i++) { | |
| 508 ciInstance* entry = _unloaded_instances->at(i); | |
| 509 if (entry->klass()->equals(instance_klass)) { | |
| 510 // We've found a match. | |
| 511 return entry; | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 // This is a new unloaded instance. Create it and stick it in | |
| 516 // the cache. | |
| 517 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
| 518 | |
| 519 init_ident_of(new_instance); | |
| 520 _unloaded_instances->append(new_instance); | |
| 521 | |
| 522 // make sure it looks the way we want: | |
| 523 assert(!new_instance->is_loaded(), ""); | |
| 524 assert(new_instance->klass() == instance_klass, ""); | |
| 525 | |
| 526 return new_instance; | |
| 527 } | |
| 528 | |
| 529 | |
| 530 //------------------------------------------------------------------ | |
| 531 // ciObjectFactory::get_unloaded_klass_mirror | |
| 532 // | |
| 533 // Get a ciInstance representing an unresolved klass mirror. | |
| 534 // | |
| 535 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 536 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
| 537 assert(ciEnv::_Class_klass != NULL, ""); | |
| 538 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
| 539 } | |
| 540 | |
| 541 //------------------------------------------------------------------ | |
| 542 // ciObjectFactory::get_unloaded_method_handle_constant | |
| 543 // | |
| 544 // Get a ciInstance representing an unresolved method handle constant. | |
| 545 // | |
| 546 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 547 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
| 548 ciSymbol* name, | |
| 549 ciSymbol* signature, | |
| 550 int ref_kind) { | |
| 551 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
| 552 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
| 553 } | |
| 554 | |
| 555 //------------------------------------------------------------------ | |
| 556 // ciObjectFactory::get_unloaded_method_type_constant | |
| 557 // | |
| 558 // Get a ciInstance representing an unresolved method type constant. | |
| 559 // | |
| 560 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 561 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
| 562 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
| 563 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
| 564 } | |
| 565 | |
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566 ciInstance* ciObjectFactory::get_unloaded_object_constant() { |
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567 if (ciEnv::_Object_klass == NULL) return NULL; |
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568 return get_unloaded_instance(ciEnv::_Object_klass->as_instance_klass()); |
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569 } |
| 1602 | 570 |
| 0 | 571 //------------------------------------------------------------------ |
| 572 // ciObjectFactory::get_empty_methodData | |
| 573 // | |
| 574 // Get the ciMethodData representing the methodData for a method with | |
| 575 // none. | |
| 576 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
| 577 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
| 578 init_ident_of(new_methodData); | |
| 579 return new_methodData; | |
| 580 } | |
| 581 | |
| 582 //------------------------------------------------------------------ | |
| 583 // ciObjectFactory::get_return_address | |
| 584 // | |
| 585 // Get a ciReturnAddress for a specified bci. | |
| 586 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
| 587 for (int i=0; i<_return_addresses->length(); i++) { | |
| 588 ciReturnAddress* entry = _return_addresses->at(i); | |
| 589 if (entry->bci() == bci) { | |
| 590 // We've found a match. | |
| 591 return entry; | |
| 592 } | |
| 593 } | |
| 594 | |
| 595 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
| 596 init_ident_of(new_ret_addr); | |
| 597 _return_addresses->append(new_ret_addr); | |
| 598 return new_ret_addr; | |
| 599 } | |
| 600 | |
| 601 // ------------------------------------------------------------------ | |
| 602 // ciObjectFactory::init_ident_of | |
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603 void ciObjectFactory::init_ident_of(ciBaseObject* obj) { |
| 0 | 604 obj->set_ident(_next_ident++); |
| 605 } | |
| 606 | |
| 607 // ------------------------------------------------------------------ | |
| 608 // ciObjectFactory::find | |
| 609 // | |
| 610 // Use binary search to find the position of this oop in the cache. | |
| 611 // If there is no entry in the cache corresponding to this oop, return | |
| 612 // the position at which the oop should be inserted. | |
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613 int ciObjectFactory::find(Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 614 int min = 0; |
| 615 int max = objects->length()-1; | |
| 616 | |
| 617 // print_contents(); | |
| 618 | |
| 619 while (max >= min) { | |
| 620 int mid = (max + min) / 2; | |
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621 Metadata* value = objects->at(mid)->constant_encoding(); |
| 0 | 622 if (value < key) { |
| 623 min = mid + 1; | |
| 624 } else if (value > key) { | |
| 625 max = mid - 1; | |
| 626 } else { | |
| 627 return mid; | |
| 628 } | |
| 629 } | |
| 630 return min; | |
| 631 } | |
| 632 | |
| 633 // ------------------------------------------------------------------ | |
| 634 // ciObjectFactory::is_found_at | |
| 635 // | |
| 636 // Verify that the binary seach found the given key. | |
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637 bool ciObjectFactory::is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 638 return (index < objects->length() && |
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639 objects->at(index)->constant_encoding() == key); |
| 0 | 640 } |
| 641 | |
| 642 | |
| 643 // ------------------------------------------------------------------ | |
| 644 // ciObjectFactory::insert | |
| 645 // | |
| 646 // Insert a ciObject into the table at some index. | |
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647 void ciObjectFactory::insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects) { |
| 0 | 648 int len = objects->length(); |
| 649 if (len == index) { | |
| 650 objects->append(obj); | |
| 651 } else { | |
| 652 objects->append(objects->at(len-1)); | |
| 653 int pos; | |
| 654 for (pos = len-2; pos >= index; pos--) { | |
| 655 objects->at_put(pos+1,objects->at(pos)); | |
| 656 } | |
| 657 objects->at_put(index, obj); | |
| 658 } | |
| 659 } | |
| 660 | |
| 661 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
| 662 | |
| 663 // ------------------------------------------------------------------ | |
| 664 // ciObjectFactory::find_non_perm | |
| 665 // | |
| 666 // Use a small hash table, hashed on the klass of the key. | |
| 667 // If there is no entry in the cache corresponding to this oop, return | |
| 668 // the null tail of the bucket into which the oop should be inserted. | |
| 669 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
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670 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
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671 ciMetadata* klass = get_metadata(key->klass()); |
| 0 | 672 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; |
| 673 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
| 674 if (is_equal(p, key)) break; | |
| 675 } | |
| 676 return (*bp); | |
| 677 } | |
| 678 | |
| 679 | |
| 680 | |
| 681 // ------------------------------------------------------------------ | |
| 682 // Code for for NonPermObject | |
| 683 // | |
| 684 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
| 685 assert(ciObjectFactory::is_initialized(), ""); | |
| 686 _object = object; | |
| 687 _next = bucket; | |
| 688 bucket = this; | |
| 689 } | |
| 690 | |
| 691 | |
| 692 | |
| 693 // ------------------------------------------------------------------ | |
| 694 // ciObjectFactory::insert_non_perm | |
| 695 // | |
| 696 // Insert a ciObject into the non-perm table. | |
| 697 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
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698 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
| 0 | 699 assert(&where != &emptyBucket, "must not try to fill empty bucket"); |
| 700 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
| 701 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
| 702 assert(find_non_perm(key) == p, "must find the same spot"); | |
| 703 ++_non_perm_count; | |
| 704 } | |
| 705 | |
| 706 // ------------------------------------------------------------------ | |
| 707 // ciObjectFactory::vm_symbol_at | |
| 708 // Get the ciSymbol corresponding to some index in vmSymbols. | |
| 709 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
| 710 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
| 711 return _shared_ci_symbols[index]; | |
| 712 } | |
| 713 | |
| 714 // ------------------------------------------------------------------ | |
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715 // ciObjectFactory::metadata_do |
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716 void ciObjectFactory::metadata_do(void f(Metadata*)) { |
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717 if (_ci_metadata == NULL) return; |
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718 for (int j = 0; j< _ci_metadata->length(); j++) { |
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719 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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720 f(o); |
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721 } |
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722 } |
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723 |
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724 // ------------------------------------------------------------------ |
| 0 | 725 // ciObjectFactory::print_contents_impl |
| 726 void ciObjectFactory::print_contents_impl() { | |
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727 int len = _ci_metadata->length(); |
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728 tty->print_cr("ciObjectFactory (%d) meta data contents:", len); |
| 0 | 729 for (int i=0; i<len; i++) { |
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730 _ci_metadata->at(i)->print(); |
| 0 | 731 tty->cr(); |
| 732 } | |
| 733 } | |
| 734 | |
| 735 // ------------------------------------------------------------------ | |
| 736 // ciObjectFactory::print_contents | |
| 737 void ciObjectFactory::print_contents() { | |
| 738 print(); | |
| 739 tty->cr(); | |
| 740 GUARDED_VM_ENTRY(print_contents_impl();) | |
| 741 } | |
| 742 | |
| 743 // ------------------------------------------------------------------ | |
| 744 // ciObjectFactory::print | |
| 745 // | |
| 746 // Print debugging information about the object factory | |
| 747 void ciObjectFactory::print() { | |
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748 tty->print("<ciObjectFactory oops=%d metadata=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
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749 _non_perm_count, _ci_metadata->length(), _unloaded_methods->length(), |
| 1602 | 750 _unloaded_instances->length(), |
| 0 | 751 _unloaded_klasses->length()); |
| 752 } |