Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciObjectFactory.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 1d7922586cf6 |
| children | f6b0eb4e44cf d8ce2825b193 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, 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" | |
| 33 #include "ci/ciNullObject.hpp" | |
| 34 #include "ci/ciObjArray.hpp" | |
| 35 #include "ci/ciObjArrayKlass.hpp" | |
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36 #include "ci/ciObject.hpp" |
| 1972 | 37 #include "ci/ciObjectFactory.hpp" |
| 38 #include "ci/ciSymbol.hpp" | |
| 39 #include "ci/ciTypeArray.hpp" | |
| 40 #include "ci/ciTypeArrayKlass.hpp" | |
| 41 #include "ci/ciUtilities.hpp" | |
| 42 #include "classfile/systemDictionary.hpp" | |
| 43 #include "gc_interface/collectedHeap.inline.hpp" | |
| 44 #include "memory/allocation.inline.hpp" | |
| 45 #include "oops/oop.inline.hpp" | |
| 46 #include "oops/oop.inline2.hpp" | |
| 47 #include "runtime/fieldType.hpp" | |
| 0 | 48 |
| 49 // ciObjectFactory | |
| 50 // | |
| 51 // This class handles requests for the creation of new instances | |
| 52 // of ciObject and its subclasses. It contains a caching mechanism | |
| 53 // which ensures that for each oop, at most one ciObject is created. | |
| 54 // This invariant allows more efficient implementation of ciObject. | |
| 55 // | |
| 56 // Implementation note: the oop->ciObject mapping is represented as | |
| 57 // a table stored in an array. Even though objects are moved | |
| 58 // by the garbage collector, the compactor preserves their relative | |
| 59 // order; address comparison of oops (in perm space) is safe so long | |
| 60 // as we prohibit GC during our comparisons. We currently use binary | |
| 61 // search to find the oop in the table, and inserting a new oop | |
| 62 // into the table may be costly. If this cost ends up being | |
| 63 // problematic the underlying data structure can be switched to some | |
| 64 // sort of balanced binary tree. | |
| 65 | |
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66 GrowableArray<ciMetadata*>* ciObjectFactory::_shared_ci_metadata = NULL; |
| 0 | 67 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; |
| 68 int ciObjectFactory::_shared_ident_limit = 0; | |
| 69 volatile bool ciObjectFactory::_initialized = false; | |
| 70 | |
| 71 | |
| 72 // ------------------------------------------------------------------ | |
| 73 // ciObjectFactory::ciObjectFactory | |
| 74 ciObjectFactory::ciObjectFactory(Arena* arena, | |
| 75 int expected_size) { | |
| 76 | |
| 77 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
| 78 _non_perm_bucket[i] = NULL; | |
| 79 } | |
| 80 _non_perm_count = 0; | |
| 81 | |
| 82 _next_ident = _shared_ident_limit; | |
| 83 _arena = arena; | |
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84 _ci_metadata = new (arena) GrowableArray<ciMetadata*>(arena, expected_size, 0, NULL); |
| 0 | 85 |
| 86 // If the shared ci objects exist append them to this factory's objects | |
| 87 | |
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88 if (_shared_ci_metadata != NULL) { |
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89 _ci_metadata->appendAll(_shared_ci_metadata); |
| 0 | 90 } |
| 91 | |
| 92 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); | |
| 93 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); | |
| 1602 | 94 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
| 0 | 95 _return_addresses = |
| 96 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
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97 |
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98 _symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL); |
| 0 | 99 } |
| 100 | |
| 101 // ------------------------------------------------------------------ | |
| 102 // ciObjectFactory::ciObjectFactory | |
| 103 void ciObjectFactory::initialize() { | |
| 104 ASSERT_IN_VM; | |
| 105 JavaThread* thread = JavaThread::current(); | |
| 106 HandleMark handle_mark(thread); | |
| 107 | |
| 108 // This Arena is long lived and exists in the resource mark of the | |
| 109 // compiler thread that initializes the initial ciObjectFactory which | |
| 110 // creates the shared ciObjects that all later ciObjectFactories use. | |
| 6197 | 111 Arena* arena = new (mtCompiler) Arena(); |
| 0 | 112 ciEnv initial(arena); |
| 113 ciEnv* env = ciEnv::current(); | |
| 114 env->_factory->init_shared_objects(); | |
| 115 | |
| 116 _initialized = true; | |
| 117 | |
| 118 } | |
| 119 | |
| 120 void ciObjectFactory::init_shared_objects() { | |
| 121 | |
| 122 _next_ident = 1; // start numbering CI objects at 1 | |
| 123 | |
| 124 { | |
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125 // Create the shared symbols, but not in _shared_ci_metadata. |
| 0 | 126 int i; |
| 127 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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128 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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129 assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping"); |
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130 ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i); |
| 0 | 131 init_ident_of(sym); |
| 132 _shared_ci_symbols[i] = sym; | |
| 133 } | |
| 134 #ifdef ASSERT | |
| 135 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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136 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
| 0 | 137 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); |
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138 assert(sym->get_symbol() == vmsym, "oop must match"); |
| 0 | 139 } |
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140 assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check"); |
| 0 | 141 #endif |
| 142 } | |
| 143 | |
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144 _ci_metadata = new (_arena) GrowableArray<ciMetadata*>(_arena, 64, 0, NULL); |
| 0 | 145 |
| 146 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 147 BasicType t = (BasicType)i; | |
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148 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP) { |
| 0 | 149 ciType::_basic_types[t] = new (_arena) ciType(t); |
| 150 init_ident_of(ciType::_basic_types[t]); | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
| 155 init_ident_of(ciEnv::_null_object_instance); | |
| 1142 | 156 |
| 157 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
| 158 if (SystemDictionary::name() != NULL) \ | |
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159 ciEnv::_##name = get_metadata(SystemDictionary::name())->as_instance_klass(); |
| 1142 | 160 |
| 161 WK_KLASSES_DO(WK_KLASS_DEFN) | |
| 162 #undef WK_KLASS_DEFN | |
| 0 | 163 |
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164 for (int len = -1; len != _ci_metadata->length(); ) { |
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165 len = _ci_metadata->length(); |
| 0 | 166 for (int i2 = 0; i2 < len; i2++) { |
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167 ciMetadata* obj = _ci_metadata->at(i2); |
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168 assert (obj->is_metadata(), "what else would it be?"); |
| 0 | 169 if (obj->is_loaded() && obj->is_instance_klass()) { |
| 170 obj->as_instance_klass()->compute_nonstatic_fields(); | |
| 171 } | |
| 172 } | |
| 173 } | |
| 174 | |
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175 ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
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176 // Create dummy InstanceKlass and objArrayKlass object and assign them idents |
| 0 | 177 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); |
| 178 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
| 179 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
| 180 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
| 181 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
| 182 | |
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183 get_metadata(Universe::boolArrayKlassObj()); |
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184 get_metadata(Universe::charArrayKlassObj()); |
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185 get_metadata(Universe::singleArrayKlassObj()); |
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186 get_metadata(Universe::doubleArrayKlassObj()); |
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187 get_metadata(Universe::byteArrayKlassObj()); |
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188 get_metadata(Universe::shortArrayKlassObj()); |
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189 get_metadata(Universe::intArrayKlassObj()); |
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190 get_metadata(Universe::longArrayKlassObj()); |
| 0 | 191 |
| 192 | |
| 193 | |
| 194 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
| 195 | |
| 196 // The shared_ident_limit is the first ident number that will | |
| 197 // be used for non-shared objects. That is, numbers less than | |
| 198 // this limit are permanently assigned to shared CI objects, | |
| 199 // while the higher numbers are recycled afresh by each new ciEnv. | |
| 200 | |
| 201 _shared_ident_limit = _next_ident; | |
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202 _shared_ci_metadata = _ci_metadata; |
| 0 | 203 } |
| 204 | |
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205 |
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206 ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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207 vmSymbols::SID sid = vmSymbols::find_sid(key); |
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208 if (sid != vmSymbols::NO_SID) { |
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209 // do not pollute the main cache with it |
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210 return vm_symbol_at(sid); |
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211 } |
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212 |
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213 assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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214 ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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215 _symbols->push(s); |
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216 return s; |
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217 } |
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218 |
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219 // Decrement the refcount when done on symbols referenced by this compilation. |
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220 void ciObjectFactory::remove_symbols() { |
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221 for (int i = 0; i < _symbols->length(); i++) { |
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222 ciSymbol* s = _symbols->at(i); |
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223 s->get_symbol()->decrement_refcount(); |
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224 } |
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225 // Since _symbols is resource allocated we're not allowed to delete it |
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226 // but it'll go away just the same. |
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227 } |
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228 |
| 0 | 229 // ------------------------------------------------------------------ |
| 230 // ciObjectFactory::get | |
| 231 // | |
| 232 // Get the ciObject corresponding to some oop. If the ciObject has | |
| 233 // already been created, it is returned. Otherwise, a new ciObject | |
| 234 // is created. | |
| 235 ciObject* ciObjectFactory::get(oop key) { | |
| 236 ASSERT_IN_VM; | |
| 237 | |
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238 assert(key == NULL || Universe::heap()->is_in_reserved(key), "must be"); |
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239 |
| 0 | 240 NonPermObject* &bucket = find_non_perm(key); |
| 241 if (bucket != NULL) { | |
| 242 return bucket->object(); | |
| 243 } | |
| 244 | |
| 245 // The ciObject does not yet exist. Create it and insert it | |
| 246 // into the cache. | |
| 247 Handle keyHandle(key); | |
| 248 ciObject* new_object = create_new_object(keyHandle()); | |
| 249 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); | |
| 250 init_ident_of(new_object); | |
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251 assert(Universe::heap()->is_in_reserved(new_object->get_oop()), "must be"); |
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252 |
| 0 | 253 // Not a perm-space object. |
| 254 insert_non_perm(bucket, keyHandle(), new_object); | |
| 255 return new_object; | |
| 256 } | |
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257 |
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258 // ------------------------------------------------------------------ |
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259 // ciObjectFactory::get |
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260 // |
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261 // Get the ciObject corresponding to some oop. If the ciObject has |
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262 // already been created, it is returned. Otherwise, a new ciObject |
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263 // is created. |
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264 ciMetadata* ciObjectFactory::get_metadata(Metadata* key) { |
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265 ASSERT_IN_VM; |
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266 |
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267 assert(key == NULL || key->is_metadata(), "must be"); |
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268 |
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269 #ifdef ASSERT |
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270 if (CIObjectFactoryVerify) { |
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271 Metadata* last = NULL; |
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272 for (int j = 0; j< _ci_metadata->length(); j++) { |
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273 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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274 assert(last < o, "out of order"); |
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275 last = o; |
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276 } |
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277 } |
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278 #endif // ASSERT |
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279 int len = _ci_metadata->length(); |
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280 int index = find(key, _ci_metadata); |
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281 #ifdef ASSERT |
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282 if (CIObjectFactoryVerify) { |
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283 for (int i=0; i<_ci_metadata->length(); i++) { |
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284 if (_ci_metadata->at(i)->constant_encoding() == key) { |
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285 assert(index == i, " bad lookup"); |
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286 } |
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287 } |
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288 } |
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289 #endif |
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290 if (!is_found_at(index, key, _ci_metadata)) { |
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291 // The ciObject does not yet exist. Create it and insert it |
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292 // into the cache. |
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293 ciMetadata* new_object = create_new_object(key); |
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294 init_ident_of(new_object); |
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295 assert(new_object->is_metadata(), "must be"); |
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296 |
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297 if (len != _ci_metadata->length()) { |
| 0 | 298 // creating the new object has recursively entered new objects |
| 299 // into the table. We need to recompute our index. | |
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300 index = find(key, _ci_metadata); |
| 0 | 301 } |
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302 assert(!is_found_at(index, key, _ci_metadata), "no double insert"); |
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303 insert(index, new_object, _ci_metadata); |
| 0 | 304 return new_object; |
| 305 } | |
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306 return _ci_metadata->at(index)->as_metadata(); |
| 0 | 307 } |
| 308 | |
| 309 // ------------------------------------------------------------------ | |
| 310 // ciObjectFactory::create_new_object | |
| 311 // | |
| 312 // Create a new ciObject from an oop. | |
| 313 // | |
| 314 // Implementation note: this functionality could be virtual behavior | |
| 315 // of the oop itself. For now, we explicitly marshal the object. | |
| 316 ciObject* ciObjectFactory::create_new_object(oop o) { | |
| 317 EXCEPTION_CONTEXT; | |
| 318 | |
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319 if (o->is_instance()) { |
| 0 | 320 instanceHandle h_i(THREAD, (instanceOop)o); |
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321 if (java_lang_invoke_CallSite::is_instance(o)) |
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322 return new (arena()) ciCallSite(h_i); |
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323 else if (java_lang_invoke_MemberName::is_instance(o)) |
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324 return new (arena()) ciMemberName(h_i); |
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325 else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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326 return new (arena()) ciMethodHandle(h_i); |
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327 else |
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328 return new (arena()) ciInstance(h_i); |
| 0 | 329 } else if (o->is_objArray()) { |
| 330 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
| 331 return new (arena()) ciObjArray(h_oa); | |
| 332 } else if (o->is_typeArray()) { | |
| 333 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
| 334 return new (arena()) ciTypeArray(h_ta); | |
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335 } |
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336 |
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337 // The oop is of some type not supported by the compiler interface. |
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338 ShouldNotReachHere(); |
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339 return NULL; |
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340 } |
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341 |
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342 // ------------------------------------------------------------------ |
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343 // ciObjectFactory::create_new_object |
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344 // |
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345 // Create a new ciObject from a Metadata*. |
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346 // |
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347 // Implementation note: this functionality could be virtual behavior |
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348 // of the oop itself. For now, we explicitly marshal the object. |
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349 ciMetadata* ciObjectFactory::create_new_object(Metadata* o) { |
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350 EXCEPTION_CONTEXT; |
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351 |
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352 if (o->is_klass()) { |
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353 KlassHandle h_k(THREAD, (Klass*)o); |
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354 Klass* k = (Klass*)o; |
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355 if (k->oop_is_instance()) { |
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356 return new (arena()) ciInstanceKlass(h_k); |
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357 } else if (k->oop_is_objArray()) { |
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358 return new (arena()) ciObjArrayKlass(h_k); |
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359 } else if (k->oop_is_typeArray()) { |
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360 return new (arena()) ciTypeArrayKlass(h_k); |
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361 } |
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362 } else if (o->is_method()) { |
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363 methodHandle h_m(THREAD, (Method*)o); |
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364 return new (arena()) ciMethod(h_m); |
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365 } else if (o->is_methodData()) { |
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366 // Hold methodHandle alive - might not be necessary ??? |
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367 methodHandle h_m(THREAD, ((MethodData*)o)->method()); |
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368 return new (arena()) ciMethodData((MethodData*)o); |
| 0 | 369 } |
| 370 | |
| 371 // The oop is of some type not supported by the compiler interface. | |
| 372 ShouldNotReachHere(); | |
| 373 return NULL; | |
| 374 } | |
| 375 | |
| 376 //------------------------------------------------------------------ | |
| 377 // ciObjectFactory::get_unloaded_method | |
| 378 // | |
| 379 // Get the ciMethod representing an unloaded/unfound method. | |
| 380 // | |
| 381 // Implementation note: unloaded methods are currently stored in | |
| 382 // an unordered array, requiring a linear-time lookup for each | |
| 383 // unloaded method. This may need to change. | |
| 384 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
| 385 ciSymbol* name, | |
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386 ciSymbol* signature, |
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387 ciInstanceKlass* accessor) { |
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388 ciSignature* that = NULL; |
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389 for (int i = 0; i < _unloaded_methods->length(); i++) { |
| 0 | 390 ciMethod* entry = _unloaded_methods->at(i); |
| 391 if (entry->holder()->equals(holder) && | |
| 392 entry->name()->equals(name) && | |
| 393 entry->signature()->as_symbol()->equals(signature)) { | |
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394 // Short-circuit slow resolve. |
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395 if (entry->signature()->accessing_klass() == accessor) { |
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396 // We've found a match. |
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397 return entry; |
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398 } else { |
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399 // Lazily create ciSignature |
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400 if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
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401 if (entry->signature()->equals(that)) { |
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402 // We've found a match. |
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403 return entry; |
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404 } |
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405 } |
| 0 | 406 } |
| 407 } | |
| 408 | |
| 409 // This is a new unloaded method. Create it and stick it in | |
| 410 // the cache. | |
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411 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
| 0 | 412 |
| 413 init_ident_of(new_method); | |
| 414 _unloaded_methods->append(new_method); | |
| 415 | |
| 416 return new_method; | |
| 417 } | |
| 418 | |
| 419 //------------------------------------------------------------------ | |
| 420 // ciObjectFactory::get_unloaded_klass | |
| 421 // | |
| 422 // Get a ciKlass representing an unloaded klass. | |
| 423 // | |
| 424 // Implementation note: unloaded klasses are currently stored in | |
| 425 // an unordered array, requiring a linear-time lookup for each | |
| 426 // unloaded klass. This may need to change. | |
| 427 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
| 428 ciSymbol* name, | |
| 429 bool create_if_not_found) { | |
| 430 EXCEPTION_CONTEXT; | |
| 431 oop loader = NULL; | |
| 432 oop domain = NULL; | |
| 433 if (accessing_klass != NULL) { | |
| 434 loader = accessing_klass->loader(); | |
| 435 domain = accessing_klass->protection_domain(); | |
| 436 } | |
| 437 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
| 438 ciKlass* entry = _unloaded_klasses->at(i); | |
| 439 if (entry->name()->equals(name) && | |
| 440 entry->loader() == loader && | |
| 441 entry->protection_domain() == domain) { | |
| 442 // We've found a match. | |
| 443 return entry; | |
| 444 } | |
| 445 } | |
| 446 | |
| 447 if (!create_if_not_found) | |
| 448 return NULL; | |
| 449 | |
| 450 // This is a new unloaded klass. Create it and stick it in | |
| 451 // the cache. | |
| 452 ciKlass* new_klass = NULL; | |
| 453 | |
| 454 // Two cases: this is an unloaded objArrayKlass or an | |
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455 // unloaded InstanceKlass. Deal with both. |
| 0 | 456 if (name->byte_at(0) == '[') { |
| 457 // Decompose the name.' | |
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458 FieldArrayInfo fd; |
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459 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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460 fd, THREAD); |
| 0 | 461 if (HAS_PENDING_EXCEPTION) { |
| 462 CLEAR_PENDING_EXCEPTION; | |
| 463 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
| 464 return ciEnv::_unloaded_ciobjarrayklass; | |
| 465 } | |
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466 int dimension = fd.dimension(); |
| 0 | 467 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
| 468 ciKlass* element_klass = NULL; | |
| 469 if (element_type == T_OBJECT) { | |
| 470 ciEnv *env = CURRENT_THREAD_ENV; | |
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471 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
| 0 | 472 element_klass = |
| 473 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
| 474 } else { | |
| 475 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
| 476 | |
| 477 // The type array itself takes care of one of the dimensions. | |
| 478 dimension--; | |
| 479 | |
| 480 // The element klass is a typeArrayKlass. | |
| 481 element_klass = ciTypeArrayKlass::make(element_type); | |
| 482 } | |
| 483 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
| 484 } else { | |
| 485 jobject loader_handle = NULL; | |
| 486 jobject domain_handle = NULL; | |
| 487 if (accessing_klass != NULL) { | |
| 488 loader_handle = accessing_klass->loader_handle(); | |
| 489 domain_handle = accessing_klass->protection_domain_handle(); | |
| 490 } | |
| 491 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
| 492 } | |
| 493 init_ident_of(new_klass); | |
| 494 _unloaded_klasses->append(new_klass); | |
| 495 | |
| 496 return new_klass; | |
| 497 } | |
| 498 | |
| 1602 | 499 |
| 500 //------------------------------------------------------------------ | |
| 501 // ciObjectFactory::get_unloaded_instance | |
| 502 // | |
| 503 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
| 504 // | |
| 505 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
| 506 for (int i=0; i<_unloaded_instances->length(); i++) { | |
| 507 ciInstance* entry = _unloaded_instances->at(i); | |
| 508 if (entry->klass()->equals(instance_klass)) { | |
| 509 // We've found a match. | |
| 510 return entry; | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 // This is a new unloaded instance. Create it and stick it in | |
| 515 // the cache. | |
| 516 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
| 517 | |
| 518 init_ident_of(new_instance); | |
| 519 _unloaded_instances->append(new_instance); | |
| 520 | |
| 521 // make sure it looks the way we want: | |
| 522 assert(!new_instance->is_loaded(), ""); | |
| 523 assert(new_instance->klass() == instance_klass, ""); | |
| 524 | |
| 525 return new_instance; | |
| 526 } | |
| 527 | |
| 528 | |
| 529 //------------------------------------------------------------------ | |
| 530 // ciObjectFactory::get_unloaded_klass_mirror | |
| 531 // | |
| 532 // Get a ciInstance representing an unresolved klass mirror. | |
| 533 // | |
| 534 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 535 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
| 536 assert(ciEnv::_Class_klass != NULL, ""); | |
| 537 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
| 538 } | |
| 539 | |
| 540 //------------------------------------------------------------------ | |
| 541 // ciObjectFactory::get_unloaded_method_handle_constant | |
| 542 // | |
| 543 // Get a ciInstance representing an unresolved method handle constant. | |
| 544 // | |
| 545 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 546 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
| 547 ciSymbol* name, | |
| 548 ciSymbol* signature, | |
| 549 int ref_kind) { | |
| 550 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
| 551 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
| 552 } | |
| 553 | |
| 554 //------------------------------------------------------------------ | |
| 555 // ciObjectFactory::get_unloaded_method_type_constant | |
| 556 // | |
| 557 // Get a ciInstance representing an unresolved method type constant. | |
| 558 // | |
| 559 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 560 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
| 561 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
| 562 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
| 563 } | |
| 564 | |
| 565 | |
| 566 | |
| 0 | 567 //------------------------------------------------------------------ |
| 568 // ciObjectFactory::get_empty_methodData | |
| 569 // | |
| 570 // Get the ciMethodData representing the methodData for a method with | |
| 571 // none. | |
| 572 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
| 573 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
| 574 init_ident_of(new_methodData); | |
| 575 return new_methodData; | |
| 576 } | |
| 577 | |
| 578 //------------------------------------------------------------------ | |
| 579 // ciObjectFactory::get_return_address | |
| 580 // | |
| 581 // Get a ciReturnAddress for a specified bci. | |
| 582 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
| 583 for (int i=0; i<_return_addresses->length(); i++) { | |
| 584 ciReturnAddress* entry = _return_addresses->at(i); | |
| 585 if (entry->bci() == bci) { | |
| 586 // We've found a match. | |
| 587 return entry; | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
| 592 init_ident_of(new_ret_addr); | |
| 593 _return_addresses->append(new_ret_addr); | |
| 594 return new_ret_addr; | |
| 595 } | |
| 596 | |
| 597 // ------------------------------------------------------------------ | |
| 598 // ciObjectFactory::init_ident_of | |
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599 void ciObjectFactory::init_ident_of(ciBaseObject* obj) { |
| 0 | 600 obj->set_ident(_next_ident++); |
| 601 } | |
| 602 | |
| 603 // ------------------------------------------------------------------ | |
| 604 // ciObjectFactory::find | |
| 605 // | |
| 606 // Use binary search to find the position of this oop in the cache. | |
| 607 // If there is no entry in the cache corresponding to this oop, return | |
| 608 // the position at which the oop should be inserted. | |
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609 int ciObjectFactory::find(Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 610 int min = 0; |
| 611 int max = objects->length()-1; | |
| 612 | |
| 613 // print_contents(); | |
| 614 | |
| 615 while (max >= min) { | |
| 616 int mid = (max + min) / 2; | |
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617 Metadata* value = objects->at(mid)->constant_encoding(); |
| 0 | 618 if (value < key) { |
| 619 min = mid + 1; | |
| 620 } else if (value > key) { | |
| 621 max = mid - 1; | |
| 622 } else { | |
| 623 return mid; | |
| 624 } | |
| 625 } | |
| 626 return min; | |
| 627 } | |
| 628 | |
| 629 // ------------------------------------------------------------------ | |
| 630 // ciObjectFactory::is_found_at | |
| 631 // | |
| 632 // Verify that the binary seach found the given key. | |
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633 bool ciObjectFactory::is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 634 return (index < objects->length() && |
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635 objects->at(index)->constant_encoding() == key); |
| 0 | 636 } |
| 637 | |
| 638 | |
| 639 // ------------------------------------------------------------------ | |
| 640 // ciObjectFactory::insert | |
| 641 // | |
| 642 // Insert a ciObject into the table at some index. | |
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643 void ciObjectFactory::insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects) { |
| 0 | 644 int len = objects->length(); |
| 645 if (len == index) { | |
| 646 objects->append(obj); | |
| 647 } else { | |
| 648 objects->append(objects->at(len-1)); | |
| 649 int pos; | |
| 650 for (pos = len-2; pos >= index; pos--) { | |
| 651 objects->at_put(pos+1,objects->at(pos)); | |
| 652 } | |
| 653 objects->at_put(index, obj); | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
| 658 | |
| 659 // ------------------------------------------------------------------ | |
| 660 // ciObjectFactory::find_non_perm | |
| 661 // | |
| 662 // Use a small hash table, hashed on the klass of the key. | |
| 663 // If there is no entry in the cache corresponding to this oop, return | |
| 664 // the null tail of the bucket into which the oop should be inserted. | |
| 665 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
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666 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
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667 ciMetadata* klass = get_metadata(key->klass()); |
| 0 | 668 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; |
| 669 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
| 670 if (is_equal(p, key)) break; | |
| 671 } | |
| 672 return (*bp); | |
| 673 } | |
| 674 | |
| 675 | |
| 676 | |
| 677 // ------------------------------------------------------------------ | |
| 678 // Code for for NonPermObject | |
| 679 // | |
| 680 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
| 681 assert(ciObjectFactory::is_initialized(), ""); | |
| 682 _object = object; | |
| 683 _next = bucket; | |
| 684 bucket = this; | |
| 685 } | |
| 686 | |
| 687 | |
| 688 | |
| 689 // ------------------------------------------------------------------ | |
| 690 // ciObjectFactory::insert_non_perm | |
| 691 // | |
| 692 // Insert a ciObject into the non-perm table. | |
| 693 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
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694 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
| 0 | 695 assert(&where != &emptyBucket, "must not try to fill empty bucket"); |
| 696 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
| 697 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
| 698 assert(find_non_perm(key) == p, "must find the same spot"); | |
| 699 ++_non_perm_count; | |
| 700 } | |
| 701 | |
| 702 // ------------------------------------------------------------------ | |
| 703 // ciObjectFactory::vm_symbol_at | |
| 704 // Get the ciSymbol corresponding to some index in vmSymbols. | |
| 705 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
| 706 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
| 707 return _shared_ci_symbols[index]; | |
| 708 } | |
| 709 | |
| 710 // ------------------------------------------------------------------ | |
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711 // ciObjectFactory::metadata_do |
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712 void ciObjectFactory::metadata_do(void f(Metadata*)) { |
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713 if (_ci_metadata == NULL) return; |
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714 for (int j = 0; j< _ci_metadata->length(); j++) { |
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715 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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716 f(o); |
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717 } |
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718 } |
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719 |
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720 // ------------------------------------------------------------------ |
| 0 | 721 // ciObjectFactory::print_contents_impl |
| 722 void ciObjectFactory::print_contents_impl() { | |
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723 int len = _ci_metadata->length(); |
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724 tty->print_cr("ciObjectFactory (%d) meta data contents:", len); |
| 0 | 725 for (int i=0; i<len; i++) { |
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726 _ci_metadata->at(i)->print(); |
| 0 | 727 tty->cr(); |
| 728 } | |
| 729 } | |
| 730 | |
| 731 // ------------------------------------------------------------------ | |
| 732 // ciObjectFactory::print_contents | |
| 733 void ciObjectFactory::print_contents() { | |
| 734 print(); | |
| 735 tty->cr(); | |
| 736 GUARDED_VM_ENTRY(print_contents_impl();) | |
| 737 } | |
| 738 | |
| 739 // ------------------------------------------------------------------ | |
| 740 // ciObjectFactory::print | |
| 741 // | |
| 742 // Print debugging information about the object factory | |
| 743 void ciObjectFactory::print() { | |
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744 tty->print("<ciObjectFactory oops=%d metadata=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
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745 _non_perm_count, _ci_metadata->length(), _unloaded_methods->length(), |
| 1602 | 746 _unloaded_instances->length(), |
| 0 | 747 _unloaded_klasses->length()); |
| 748 } |