Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 20670:6a528388c7da
8060147: SIGSEGV in Metadata::mark_on_stack() while marking metadata in ciEnv
Reviewed-by: kvn, roland, coleenp, mgerdin
| author | vlivanov |
|---|---|
| date | Tue, 11 Nov 2014 04:46:13 -0800 |
| parents | 833b0f92429a |
| children | 7848fc12602b |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 20360 | 2 * Copyright (c) 1999, 2014, 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" | |
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49 #if INCLUDE_ALL_GCS |
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50 # include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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51 #endif |
| 0 | 52 |
| 53 // ciObjectFactory | |
| 54 // | |
| 55 // This class handles requests for the creation of new instances | |
| 56 // of ciObject and its subclasses. It contains a caching mechanism | |
| 57 // which ensures that for each oop, at most one ciObject is created. | |
| 58 // This invariant allows more efficient implementation of ciObject. | |
| 59 // | |
| 60 // Implementation note: the oop->ciObject mapping is represented as | |
| 61 // a table stored in an array. Even though objects are moved | |
| 62 // by the garbage collector, the compactor preserves their relative | |
| 63 // order; address comparison of oops (in perm space) is safe so long | |
| 64 // as we prohibit GC during our comparisons. We currently use binary | |
| 65 // search to find the oop in the table, and inserting a new oop | |
| 66 // into the table may be costly. If this cost ends up being | |
| 67 // problematic the underlying data structure can be switched to some | |
| 68 // sort of balanced binary tree. | |
| 69 | |
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70 GrowableArray<ciMetadata*>* ciObjectFactory::_shared_ci_metadata = NULL; |
| 0 | 71 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; |
| 72 int ciObjectFactory::_shared_ident_limit = 0; | |
| 73 volatile bool ciObjectFactory::_initialized = false; | |
| 74 | |
| 75 | |
| 76 // ------------------------------------------------------------------ | |
| 77 // ciObjectFactory::ciObjectFactory | |
| 78 ciObjectFactory::ciObjectFactory(Arena* arena, | |
| 79 int expected_size) { | |
| 80 | |
| 81 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
| 82 _non_perm_bucket[i] = NULL; | |
| 83 } | |
| 84 _non_perm_count = 0; | |
| 85 | |
| 86 _next_ident = _shared_ident_limit; | |
| 87 _arena = arena; | |
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88 _ci_metadata = new (arena) GrowableArray<ciMetadata*>(arena, expected_size, 0, NULL); |
| 0 | 89 |
| 90 // If the shared ci objects exist append them to this factory's objects | |
| 91 | |
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92 if (_shared_ci_metadata != NULL) { |
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93 _ci_metadata->appendAll(_shared_ci_metadata); |
| 0 | 94 } |
| 95 | |
| 96 _unloaded_methods = new (arena) GrowableArray<ciMethod*>(arena, 4, 0, NULL); | |
| 97 _unloaded_klasses = new (arena) GrowableArray<ciKlass*>(arena, 8, 0, NULL); | |
| 1602 | 98 _unloaded_instances = new (arena) GrowableArray<ciInstance*>(arena, 4, 0, NULL); |
| 0 | 99 _return_addresses = |
| 100 new (arena) GrowableArray<ciReturnAddress*>(arena, 8, 0, NULL); | |
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101 |
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102 _symbols = new (arena) GrowableArray<ciSymbol*>(arena, 100, 0, NULL); |
| 0 | 103 } |
| 104 | |
| 105 // ------------------------------------------------------------------ | |
| 106 // ciObjectFactory::ciObjectFactory | |
| 107 void ciObjectFactory::initialize() { | |
| 108 ASSERT_IN_VM; | |
| 109 JavaThread* thread = JavaThread::current(); | |
| 110 HandleMark handle_mark(thread); | |
| 111 | |
| 112 // This Arena is long lived and exists in the resource mark of the | |
| 113 // compiler thread that initializes the initial ciObjectFactory which | |
| 114 // creates the shared ciObjects that all later ciObjectFactories use. | |
| 20360 | 115 Arena* arena = new (mtCompiler) Arena(mtCompiler); |
| 0 | 116 ciEnv initial(arena); |
| 117 ciEnv* env = ciEnv::current(); | |
| 118 env->_factory->init_shared_objects(); | |
| 119 | |
| 120 _initialized = true; | |
| 121 | |
| 122 } | |
| 123 | |
| 124 void ciObjectFactory::init_shared_objects() { | |
| 125 | |
| 126 _next_ident = 1; // start numbering CI objects at 1 | |
| 127 | |
| 128 { | |
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129 // Create the shared symbols, but not in _shared_ci_metadata. |
| 0 | 130 int i; |
| 131 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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132 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
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133 assert(vmSymbols::find_sid(vmsym) == i, "1-1 mapping"); |
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134 ciSymbol* sym = new (_arena) ciSymbol(vmsym, (vmSymbols::SID) i); |
| 0 | 135 init_ident_of(sym); |
| 136 _shared_ci_symbols[i] = sym; | |
| 137 } | |
| 138 #ifdef ASSERT | |
| 139 for (i = vmSymbols::FIRST_SID; i < vmSymbols::SID_LIMIT; i++) { | |
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140 Symbol* vmsym = vmSymbols::symbol_at((vmSymbols::SID) i); |
| 0 | 141 ciSymbol* sym = vm_symbol_at((vmSymbols::SID) i); |
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142 assert(sym->get_symbol() == vmsym, "oop must match"); |
| 0 | 143 } |
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144 assert(ciSymbol::void_class_signature()->get_symbol() == vmSymbols::void_class_signature(), "spot check"); |
| 0 | 145 #endif |
| 146 } | |
| 147 | |
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148 _ci_metadata = new (_arena) GrowableArray<ciMetadata*>(_arena, 64, 0, NULL); |
| 0 | 149 |
| 150 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 151 BasicType t = (BasicType)i; | |
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152 if (type2name(t) != NULL && t != T_OBJECT && t != T_ARRAY && t != T_NARROWOOP && t != T_NARROWKLASS) { |
| 0 | 153 ciType::_basic_types[t] = new (_arena) ciType(t); |
| 154 init_ident_of(ciType::_basic_types[t]); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 ciEnv::_null_object_instance = new (_arena) ciNullObject(); | |
| 159 init_ident_of(ciEnv::_null_object_instance); | |
| 1142 | 160 |
| 161 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
| 162 if (SystemDictionary::name() != NULL) \ | |
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163 ciEnv::_##name = get_metadata(SystemDictionary::name())->as_instance_klass(); |
| 1142 | 164 |
| 165 WK_KLASSES_DO(WK_KLASS_DEFN) | |
| 166 #undef WK_KLASS_DEFN | |
| 0 | 167 |
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168 for (int len = -1; len != _ci_metadata->length(); ) { |
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169 len = _ci_metadata->length(); |
| 0 | 170 for (int i2 = 0; i2 < len; i2++) { |
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171 ciMetadata* obj = _ci_metadata->at(i2); |
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172 assert (obj->is_metadata(), "what else would it be?"); |
| 0 | 173 if (obj->is_loaded() && obj->is_instance_klass()) { |
| 174 obj->as_instance_klass()->compute_nonstatic_fields(); | |
| 175 } | |
| 176 } | |
| 177 } | |
| 178 | |
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179 ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
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180 // Create dummy InstanceKlass and ObjArrayKlass object and assign them idents |
| 0 | 181 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); |
| 182 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
| 183 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
| 184 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
| 185 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
| 186 | |
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187 get_metadata(Universe::boolArrayKlassObj()); |
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188 get_metadata(Universe::charArrayKlassObj()); |
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189 get_metadata(Universe::singleArrayKlassObj()); |
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190 get_metadata(Universe::doubleArrayKlassObj()); |
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191 get_metadata(Universe::byteArrayKlassObj()); |
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192 get_metadata(Universe::shortArrayKlassObj()); |
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193 get_metadata(Universe::intArrayKlassObj()); |
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194 get_metadata(Universe::longArrayKlassObj()); |
| 0 | 195 |
| 196 | |
| 197 | |
| 198 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
| 199 | |
| 200 // The shared_ident_limit is the first ident number that will | |
| 201 // be used for non-shared objects. That is, numbers less than | |
| 202 // this limit are permanently assigned to shared CI objects, | |
| 203 // while the higher numbers are recycled afresh by each new ciEnv. | |
| 204 | |
| 205 _shared_ident_limit = _next_ident; | |
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206 _shared_ci_metadata = _ci_metadata; |
| 0 | 207 } |
| 208 | |
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209 |
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210 ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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211 vmSymbols::SID sid = vmSymbols::find_sid(key); |
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212 if (sid != vmSymbols::NO_SID) { |
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213 // do not pollute the main cache with it |
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214 return vm_symbol_at(sid); |
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215 } |
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216 |
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217 assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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218 ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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219 _symbols->push(s); |
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220 return s; |
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221 } |
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222 |
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223 // Decrement the refcount when done on symbols referenced by this compilation. |
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224 void ciObjectFactory::remove_symbols() { |
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225 for (int i = 0; i < _symbols->length(); i++) { |
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226 ciSymbol* s = _symbols->at(i); |
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227 s->get_symbol()->decrement_refcount(); |
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228 } |
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229 // Since _symbols is resource allocated we're not allowed to delete it |
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230 // but it'll go away just the same. |
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231 } |
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232 |
| 0 | 233 // ------------------------------------------------------------------ |
| 234 // ciObjectFactory::get | |
| 235 // | |
| 236 // Get the ciObject corresponding to some oop. If the ciObject has | |
| 237 // already been created, it is returned. Otherwise, a new ciObject | |
| 238 // is created. | |
| 239 ciObject* ciObjectFactory::get(oop key) { | |
| 240 ASSERT_IN_VM; | |
| 241 | |
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242 assert(Universe::heap()->is_in_reserved(key), "must be"); |
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243 |
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244 NonPermObject* &bucket = find_non_perm(key); |
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245 if (bucket != NULL) { |
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246 return bucket->object(); |
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247 } |
| 0 | 248 |
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249 // The ciObject does not yet exist. Create it and insert it |
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250 // into the cache. |
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251 Handle keyHandle(key); |
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252 ciObject* new_object = create_new_object(keyHandle()); |
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253 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); |
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254 init_ident_of(new_object); |
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255 assert(Universe::heap()->is_in_reserved(new_object->get_oop()), "must be"); |
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256 |
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257 // Not a perm-space object. |
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258 insert_non_perm(bucket, keyHandle(), new_object); |
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259 return new_object; |
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260 } |
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261 |
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262 // ------------------------------------------------------------------ |
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263 // ciObjectFactory::get_metadata |
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264 // |
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265 // Get the ciMetadata corresponding to some Metadata. If the ciMetadata has |
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266 // already been created, it is returned. Otherwise, a new ciMetadata |
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267 // is created. |
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268 ciMetadata* ciObjectFactory::get_metadata(Metadata* key) { |
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269 ASSERT_IN_VM; |
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270 |
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271 #ifdef ASSERT |
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272 if (CIObjectFactoryVerify) { |
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273 Metadata* last = NULL; |
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274 for (int j = 0; j< _ci_metadata->length(); j++) { |
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275 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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276 assert(last < o, "out of order"); |
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277 last = o; |
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278 } |
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279 } |
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280 #endif // ASSERT |
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281 int len = _ci_metadata->length(); |
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282 int index = find(key, _ci_metadata); |
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283 #ifdef ASSERT |
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284 if (CIObjectFactoryVerify) { |
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285 for (int i=0; i<_ci_metadata->length(); i++) { |
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286 if (_ci_metadata->at(i)->constant_encoding() == key) { |
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287 assert(index == i, " bad lookup"); |
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288 } |
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289 } |
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290 } |
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291 #endif |
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292 if (!is_found_at(index, key, _ci_metadata)) { |
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293 // The ciMetadata does not yet exist. Create it and insert it |
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294 // into the cache. |
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295 ciMetadata* new_object = create_new_metadata(key); |
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296 init_ident_of(new_object); |
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297 assert(new_object->is_metadata(), "must be"); |
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298 |
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299 if (len != _ci_metadata->length()) { |
| 0 | 300 // creating the new object has recursively entered new objects |
| 301 // into the table. We need to recompute our index. | |
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302 index = find(key, _ci_metadata); |
| 0 | 303 } |
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304 assert(!is_found_at(index, key, _ci_metadata), "no double insert"); |
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305 insert(index, new_object, _ci_metadata); |
| 0 | 306 return new_object; |
| 307 } | |
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308 return _ci_metadata->at(index)->as_metadata(); |
| 0 | 309 } |
| 310 | |
| 311 // ------------------------------------------------------------------ | |
| 312 // ciObjectFactory::create_new_object | |
| 313 // | |
| 314 // Create a new ciObject from an oop. | |
| 315 // | |
| 316 // Implementation note: this functionality could be virtual behavior | |
| 317 // of the oop itself. For now, we explicitly marshal the object. | |
| 318 ciObject* ciObjectFactory::create_new_object(oop o) { | |
| 319 EXCEPTION_CONTEXT; | |
| 320 | |
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321 if (o->is_instance()) { |
| 0 | 322 instanceHandle h_i(THREAD, (instanceOop)o); |
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323 if (java_lang_invoke_CallSite::is_instance(o)) |
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324 return new (arena()) ciCallSite(h_i); |
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325 else if (java_lang_invoke_MemberName::is_instance(o)) |
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326 return new (arena()) ciMemberName(h_i); |
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327 else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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328 return new (arena()) ciMethodHandle(h_i); |
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329 else if (java_lang_invoke_MethodType::is_instance(o)) |
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330 return new (arena()) ciMethodType(h_i); |
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331 else |
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332 return new (arena()) ciInstance(h_i); |
| 0 | 333 } else if (o->is_objArray()) { |
| 334 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
| 335 return new (arena()) ciObjArray(h_oa); | |
| 336 } else if (o->is_typeArray()) { | |
| 337 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
| 338 return new (arena()) ciTypeArray(h_ta); | |
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339 } |
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340 |
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341 // The oop is of some type not supported by the compiler interface. |
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342 ShouldNotReachHere(); |
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343 return NULL; |
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344 } |
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345 |
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346 // ------------------------------------------------------------------ |
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347 // ciObjectFactory::create_new_metadata |
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348 // |
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349 // Create a new ciMetadata from a Metadata*. |
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350 // |
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351 // Implementation note: in order to keep Metadata live, an auxiliary ciObject |
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352 // is used, which points to it's holder. |
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353 ciMetadata* ciObjectFactory::create_new_metadata(Metadata* o) { |
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354 EXCEPTION_CONTEXT; |
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355 |
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356 // Hold metadata from unloading by keeping it's holder alive. |
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357 if (_initialized && o->is_klass()) { |
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358 Klass* holder = ((Klass*)o); |
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359 if (holder->oop_is_instance() && InstanceKlass::cast(holder)->is_anonymous()) { |
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360 // Though ciInstanceKlass records class loader oop, it's not enough to keep |
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361 // VM anonymous classes alive (loader == NULL). Klass holder should be used instead. |
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362 // It is enough to record a ciObject, since cached elements are never removed |
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363 // during ciObjectFactory lifetime. ciObjectFactory itself is created for |
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364 // every compilation and lives for the whole duration of the compilation. |
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365 ciObject* h = get(holder->klass_holder()); |
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366 } |
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367 } |
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368 |
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369 if (o->is_klass()) { |
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370 KlassHandle h_k(THREAD, (Klass*)o); |
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371 Klass* k = (Klass*)o; |
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372 if (k->oop_is_instance()) { |
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373 return new (arena()) ciInstanceKlass(h_k); |
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374 } else if (k->oop_is_objArray()) { |
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375 return new (arena()) ciObjArrayKlass(h_k); |
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376 } else if (k->oop_is_typeArray()) { |
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377 return new (arena()) ciTypeArrayKlass(h_k); |
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378 } |
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379 } else if (o->is_method()) { |
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380 methodHandle h_m(THREAD, (Method*)o); |
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381 ciEnv *env = CURRENT_THREAD_ENV; |
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382 ciInstanceKlass* holder = env->get_instance_klass(h_m()->method_holder()); |
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383 return new (arena()) ciMethod(h_m, holder); |
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384 } else if (o->is_methodData()) { |
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385 // Hold methodHandle alive - might not be necessary ??? |
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386 methodHandle h_m(THREAD, ((MethodData*)o)->method()); |
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387 return new (arena()) ciMethodData((MethodData*)o); |
| 0 | 388 } |
| 389 | |
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390 // The Metadata* is of some type not supported by the compiler interface. |
| 0 | 391 ShouldNotReachHere(); |
| 392 return NULL; | |
| 393 } | |
| 394 | |
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395 // ------------------------------------------------------------------ |
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396 // ciObjectFactory::ensure_metadata_alive |
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397 // |
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398 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC. |
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399 // This is primarily useful for metadata which is considered as weak roots |
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400 // by the GC but need to be strong roots if reachable from a current compilation. |
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401 // |
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402 void ciObjectFactory::ensure_metadata_alive(ciMetadata* m) { |
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403 ASSERT_IN_VM; // We're handling raw oops here. |
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404 |
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405 #if INCLUDE_ALL_GCS |
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406 if (!UseG1GC) { |
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407 return; |
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408 } |
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409 Klass* metadata_owner_klass; |
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410 if (m->is_klass()) { |
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411 metadata_owner_klass = m->as_klass()->get_Klass(); |
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412 } else if (m->is_method()) { |
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413 metadata_owner_klass = m->as_method()->get_Method()->constants()->pool_holder(); |
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414 } else { |
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415 fatal("Not implemented for other types of metadata"); |
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416 } |
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417 |
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418 oop metadata_holder = metadata_owner_klass->klass_holder(); |
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419 if (metadata_holder != NULL) { |
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420 G1SATBCardTableModRefBS::enqueue(metadata_holder); |
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421 } |
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422 |
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423 #endif |
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424 } |
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425 |
| 0 | 426 //------------------------------------------------------------------ |
| 427 // ciObjectFactory::get_unloaded_method | |
| 428 // | |
| 429 // Get the ciMethod representing an unloaded/unfound method. | |
| 430 // | |
| 431 // Implementation note: unloaded methods are currently stored in | |
| 432 // an unordered array, requiring a linear-time lookup for each | |
| 433 // unloaded method. This may need to change. | |
| 434 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
| 435 ciSymbol* name, | |
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436 ciSymbol* signature, |
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437 ciInstanceKlass* accessor) { |
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438 ciSignature* that = NULL; |
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439 for (int i = 0; i < _unloaded_methods->length(); i++) { |
| 0 | 440 ciMethod* entry = _unloaded_methods->at(i); |
| 441 if (entry->holder()->equals(holder) && | |
| 442 entry->name()->equals(name) && | |
| 443 entry->signature()->as_symbol()->equals(signature)) { | |
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444 // Short-circuit slow resolve. |
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445 if (entry->signature()->accessing_klass() == accessor) { |
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446 // We've found a match. |
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447 return entry; |
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448 } else { |
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449 // Lazily create ciSignature |
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450 if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
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451 if (entry->signature()->equals(that)) { |
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452 // We've found a match. |
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453 return entry; |
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454 } |
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455 } |
| 0 | 456 } |
| 457 } | |
| 458 | |
| 459 // This is a new unloaded method. Create it and stick it in | |
| 460 // the cache. | |
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461 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
| 0 | 462 |
| 463 init_ident_of(new_method); | |
| 464 _unloaded_methods->append(new_method); | |
| 465 | |
| 466 return new_method; | |
| 467 } | |
| 468 | |
| 469 //------------------------------------------------------------------ | |
| 470 // ciObjectFactory::get_unloaded_klass | |
| 471 // | |
| 472 // Get a ciKlass representing an unloaded klass. | |
| 473 // | |
| 474 // Implementation note: unloaded klasses are currently stored in | |
| 475 // an unordered array, requiring a linear-time lookup for each | |
| 476 // unloaded klass. This may need to change. | |
| 477 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
| 478 ciSymbol* name, | |
| 479 bool create_if_not_found) { | |
| 480 EXCEPTION_CONTEXT; | |
| 481 oop loader = NULL; | |
| 482 oop domain = NULL; | |
| 483 if (accessing_klass != NULL) { | |
| 484 loader = accessing_klass->loader(); | |
| 485 domain = accessing_klass->protection_domain(); | |
| 486 } | |
| 487 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
| 488 ciKlass* entry = _unloaded_klasses->at(i); | |
| 489 if (entry->name()->equals(name) && | |
| 490 entry->loader() == loader && | |
| 491 entry->protection_domain() == domain) { | |
| 492 // We've found a match. | |
| 493 return entry; | |
| 494 } | |
| 495 } | |
| 496 | |
| 497 if (!create_if_not_found) | |
| 498 return NULL; | |
| 499 | |
| 500 // This is a new unloaded klass. Create it and stick it in | |
| 501 // the cache. | |
| 502 ciKlass* new_klass = NULL; | |
| 503 | |
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504 // Two cases: this is an unloaded ObjArrayKlass or an |
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505 // unloaded InstanceKlass. Deal with both. |
| 0 | 506 if (name->byte_at(0) == '[') { |
| 507 // Decompose the name.' | |
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508 FieldArrayInfo fd; |
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509 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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510 fd, THREAD); |
| 0 | 511 if (HAS_PENDING_EXCEPTION) { |
| 512 CLEAR_PENDING_EXCEPTION; | |
| 513 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
| 514 return ciEnv::_unloaded_ciobjarrayklass; | |
| 515 } | |
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516 int dimension = fd.dimension(); |
| 0 | 517 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
| 518 ciKlass* element_klass = NULL; | |
| 519 if (element_type == T_OBJECT) { | |
| 520 ciEnv *env = CURRENT_THREAD_ENV; | |
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521 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
| 0 | 522 element_klass = |
| 523 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
| 524 } else { | |
| 525 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
| 526 | |
| 527 // The type array itself takes care of one of the dimensions. | |
| 528 dimension--; | |
| 529 | |
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530 // The element klass is a TypeArrayKlass. |
| 0 | 531 element_klass = ciTypeArrayKlass::make(element_type); |
| 532 } | |
| 533 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
| 534 } else { | |
| 535 jobject loader_handle = NULL; | |
| 536 jobject domain_handle = NULL; | |
| 537 if (accessing_klass != NULL) { | |
| 538 loader_handle = accessing_klass->loader_handle(); | |
| 539 domain_handle = accessing_klass->protection_domain_handle(); | |
| 540 } | |
| 541 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
| 542 } | |
| 543 init_ident_of(new_klass); | |
| 544 _unloaded_klasses->append(new_klass); | |
| 545 | |
| 546 return new_klass; | |
| 547 } | |
| 548 | |
| 1602 | 549 |
| 550 //------------------------------------------------------------------ | |
| 551 // ciObjectFactory::get_unloaded_instance | |
| 552 // | |
| 553 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
| 554 // | |
| 555 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
| 556 for (int i=0; i<_unloaded_instances->length(); i++) { | |
| 557 ciInstance* entry = _unloaded_instances->at(i); | |
| 558 if (entry->klass()->equals(instance_klass)) { | |
| 559 // We've found a match. | |
| 560 return entry; | |
| 561 } | |
| 562 } | |
| 563 | |
| 564 // This is a new unloaded instance. Create it and stick it in | |
| 565 // the cache. | |
| 566 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
| 567 | |
| 568 init_ident_of(new_instance); | |
| 569 _unloaded_instances->append(new_instance); | |
| 570 | |
| 571 // make sure it looks the way we want: | |
| 572 assert(!new_instance->is_loaded(), ""); | |
| 573 assert(new_instance->klass() == instance_klass, ""); | |
| 574 | |
| 575 return new_instance; | |
| 576 } | |
| 577 | |
| 578 | |
| 579 //------------------------------------------------------------------ | |
| 580 // ciObjectFactory::get_unloaded_klass_mirror | |
| 581 // | |
| 582 // Get a ciInstance representing an unresolved klass mirror. | |
| 583 // | |
| 584 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 585 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
| 586 assert(ciEnv::_Class_klass != NULL, ""); | |
| 587 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
| 588 } | |
| 589 | |
| 590 //------------------------------------------------------------------ | |
| 591 // ciObjectFactory::get_unloaded_method_handle_constant | |
| 592 // | |
| 593 // Get a ciInstance representing an unresolved method handle constant. | |
| 594 // | |
| 595 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 596 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
| 597 ciSymbol* name, | |
| 598 ciSymbol* signature, | |
| 599 int ref_kind) { | |
| 600 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
| 601 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
| 602 } | |
| 603 | |
| 604 //------------------------------------------------------------------ | |
| 605 // ciObjectFactory::get_unloaded_method_type_constant | |
| 606 // | |
| 607 // Get a ciInstance representing an unresolved method type constant. | |
| 608 // | |
| 609 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
| 610 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
| 611 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
| 612 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
| 613 } | |
| 614 | |
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615 ciInstance* ciObjectFactory::get_unloaded_object_constant() { |
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616 if (ciEnv::_Object_klass == NULL) return NULL; |
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617 return get_unloaded_instance(ciEnv::_Object_klass->as_instance_klass()); |
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618 } |
| 1602 | 619 |
| 0 | 620 //------------------------------------------------------------------ |
| 621 // ciObjectFactory::get_empty_methodData | |
| 622 // | |
| 623 // Get the ciMethodData representing the methodData for a method with | |
| 624 // none. | |
| 625 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
| 626 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
| 627 init_ident_of(new_methodData); | |
| 628 return new_methodData; | |
| 629 } | |
| 630 | |
| 631 //------------------------------------------------------------------ | |
| 632 // ciObjectFactory::get_return_address | |
| 633 // | |
| 634 // Get a ciReturnAddress for a specified bci. | |
| 635 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
| 636 for (int i=0; i<_return_addresses->length(); i++) { | |
| 637 ciReturnAddress* entry = _return_addresses->at(i); | |
| 638 if (entry->bci() == bci) { | |
| 639 // We've found a match. | |
| 640 return entry; | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
| 645 init_ident_of(new_ret_addr); | |
| 646 _return_addresses->append(new_ret_addr); | |
| 647 return new_ret_addr; | |
| 648 } | |
| 649 | |
| 650 // ------------------------------------------------------------------ | |
| 651 // ciObjectFactory::init_ident_of | |
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652 void ciObjectFactory::init_ident_of(ciBaseObject* obj) { |
| 0 | 653 obj->set_ident(_next_ident++); |
| 654 } | |
| 655 | |
| 656 // ------------------------------------------------------------------ | |
| 657 // ciObjectFactory::find | |
| 658 // | |
| 659 // Use binary search to find the position of this oop in the cache. | |
| 660 // If there is no entry in the cache corresponding to this oop, return | |
| 661 // the position at which the oop should be inserted. | |
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662 int ciObjectFactory::find(Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 663 int min = 0; |
| 664 int max = objects->length()-1; | |
| 665 | |
| 666 // print_contents(); | |
| 667 | |
| 668 while (max >= min) { | |
| 669 int mid = (max + min) / 2; | |
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670 Metadata* value = objects->at(mid)->constant_encoding(); |
| 0 | 671 if (value < key) { |
| 672 min = mid + 1; | |
| 673 } else if (value > key) { | |
| 674 max = mid - 1; | |
| 675 } else { | |
| 676 return mid; | |
| 677 } | |
| 678 } | |
| 679 return min; | |
| 680 } | |
| 681 | |
| 682 // ------------------------------------------------------------------ | |
| 683 // ciObjectFactory::is_found_at | |
| 684 // | |
| 685 // Verify that the binary seach found the given key. | |
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686 bool ciObjectFactory::is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects) { |
| 0 | 687 return (index < objects->length() && |
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688 objects->at(index)->constant_encoding() == key); |
| 0 | 689 } |
| 690 | |
| 691 | |
| 692 // ------------------------------------------------------------------ | |
| 693 // ciObjectFactory::insert | |
| 694 // | |
| 695 // Insert a ciObject into the table at some index. | |
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696 void ciObjectFactory::insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects) { |
| 0 | 697 int len = objects->length(); |
| 698 if (len == index) { | |
| 699 objects->append(obj); | |
| 700 } else { | |
| 701 objects->append(objects->at(len-1)); | |
| 702 int pos; | |
| 703 for (pos = len-2; pos >= index; pos--) { | |
| 704 objects->at_put(pos+1,objects->at(pos)); | |
| 705 } | |
| 706 objects->at_put(index, obj); | |
| 707 } | |
| 708 } | |
| 709 | |
| 710 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
| 711 | |
| 712 // ------------------------------------------------------------------ | |
| 713 // ciObjectFactory::find_non_perm | |
| 714 // | |
| 715 // Use a small hash table, hashed on the klass of the key. | |
| 716 // If there is no entry in the cache corresponding to this oop, return | |
| 717 // the null tail of the bucket into which the oop should be inserted. | |
| 718 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
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719 assert(Universe::heap()->is_in_reserved(key), "must be"); |
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720 ciMetadata* klass = get_metadata(key->klass()); |
| 0 | 721 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; |
| 722 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
| 723 if (is_equal(p, key)) break; | |
| 724 } | |
| 725 return (*bp); | |
| 726 } | |
| 727 | |
| 728 | |
| 729 | |
| 730 // ------------------------------------------------------------------ | |
| 731 // Code for for NonPermObject | |
| 732 // | |
| 733 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
| 734 assert(ciObjectFactory::is_initialized(), ""); | |
| 735 _object = object; | |
| 736 _next = bucket; | |
| 737 bucket = this; | |
| 738 } | |
| 739 | |
| 740 | |
| 741 | |
| 742 // ------------------------------------------------------------------ | |
| 743 // ciObjectFactory::insert_non_perm | |
| 744 // | |
| 745 // Insert a ciObject into the non-perm table. | |
| 746 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
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747 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
| 0 | 748 assert(&where != &emptyBucket, "must not try to fill empty bucket"); |
| 749 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
| 750 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
| 751 assert(find_non_perm(key) == p, "must find the same spot"); | |
| 752 ++_non_perm_count; | |
| 753 } | |
| 754 | |
| 755 // ------------------------------------------------------------------ | |
| 756 // ciObjectFactory::vm_symbol_at | |
| 757 // Get the ciSymbol corresponding to some index in vmSymbols. | |
| 758 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
| 759 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
| 760 return _shared_ci_symbols[index]; | |
| 761 } | |
| 762 | |
| 763 // ------------------------------------------------------------------ | |
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764 // ciObjectFactory::metadata_do |
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765 void ciObjectFactory::metadata_do(void f(Metadata*)) { |
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766 if (_ci_metadata == NULL) return; |
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767 for (int j = 0; j< _ci_metadata->length(); j++) { |
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768 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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769 f(o); |
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770 } |
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771 } |
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772 |
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773 // ------------------------------------------------------------------ |
| 0 | 774 // ciObjectFactory::print_contents_impl |
| 775 void ciObjectFactory::print_contents_impl() { | |
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776 int len = _ci_metadata->length(); |
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777 tty->print_cr("ciObjectFactory (%d) meta data contents:", len); |
| 0 | 778 for (int i=0; i<len; i++) { |
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779 _ci_metadata->at(i)->print(); |
| 0 | 780 tty->cr(); |
| 781 } | |
| 782 } | |
| 783 | |
| 784 // ------------------------------------------------------------------ | |
| 785 // ciObjectFactory::print_contents | |
| 786 void ciObjectFactory::print_contents() { | |
| 787 print(); | |
| 788 tty->cr(); | |
| 789 GUARDED_VM_ENTRY(print_contents_impl();) | |
| 790 } | |
| 791 | |
| 792 // ------------------------------------------------------------------ | |
| 793 // ciObjectFactory::print | |
| 794 // | |
| 795 // Print debugging information about the object factory | |
| 796 void ciObjectFactory::print() { | |
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797 tty->print("<ciObjectFactory oops=%d metadata=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
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798 _non_perm_count, _ci_metadata->length(), _unloaded_methods->length(), |
| 1602 | 799 _unloaded_instances->length(), |
| 0 | 800 _unloaded_klasses->length()); |
| 801 } |