Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 20449:2402de236865
Merge
author | drchase |
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date | Wed, 10 Sep 2014 21:45:28 +0000 |
parents | 833b0f92429a |
children | 6a528388c7da |
rev | line source |
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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(key == NULL || 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 |
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264 // |
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265 // Get the ciObject corresponding to some oop. If the ciObject has |
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266 // already been created, it is returned. Otherwise, a new ciObject |
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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 ciObject 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_object(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_object |
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348 // |
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349 // Create a new ciObject from a Metadata*. |
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350 // |
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351 // Implementation note: this functionality could be virtual behavior |
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352 // of the oop itself. For now, we explicitly marshal the object. |
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353 ciMetadata* ciObjectFactory::create_new_object(Metadata* o) { |
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354 EXCEPTION_CONTEXT; |
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355 |
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356 if (o->is_klass()) { |
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357 KlassHandle h_k(THREAD, (Klass*)o); |
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358 Klass* k = (Klass*)o; |
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359 if (k->oop_is_instance()) { |
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360 return new (arena()) ciInstanceKlass(h_k); |
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361 } else if (k->oop_is_objArray()) { |
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362 return new (arena()) ciObjArrayKlass(h_k); |
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363 } else if (k->oop_is_typeArray()) { |
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364 return new (arena()) ciTypeArrayKlass(h_k); |
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365 } |
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366 } else if (o->is_method()) { |
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367 methodHandle h_m(THREAD, (Method*)o); |
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368 return new (arena()) ciMethod(h_m); |
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369 } else if (o->is_methodData()) { |
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370 // Hold methodHandle alive - might not be necessary ??? |
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371 methodHandle h_m(THREAD, ((MethodData*)o)->method()); |
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372 return new (arena()) ciMethodData((MethodData*)o); |
0 | 373 } |
374 | |
375 // The oop is of some type not supported by the compiler interface. | |
376 ShouldNotReachHere(); | |
377 return NULL; | |
378 } | |
379 | |
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380 // ------------------------------------------------------------------ |
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381 // ciObjectFactory::ensure_metadata_alive |
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382 // |
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383 // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC. |
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384 // This is primarily useful for metadata which is considered as weak roots |
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385 // by the GC but need to be strong roots if reachable from a current compilation. |
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386 // |
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387 void ciObjectFactory::ensure_metadata_alive(ciMetadata* m) { |
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388 ASSERT_IN_VM; // We're handling raw oops here. |
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389 |
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390 #if INCLUDE_ALL_GCS |
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391 if (!UseG1GC) { |
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392 return; |
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393 } |
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394 Klass* metadata_owner_klass; |
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395 if (m->is_klass()) { |
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396 metadata_owner_klass = m->as_klass()->get_Klass(); |
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397 } else if (m->is_method()) { |
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398 metadata_owner_klass = m->as_method()->get_Method()->constants()->pool_holder(); |
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399 } else { |
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400 fatal("Not implemented for other types of metadata"); |
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401 } |
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402 |
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403 oop metadata_holder = metadata_owner_klass->klass_holder(); |
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404 if (metadata_holder != NULL) { |
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405 G1SATBCardTableModRefBS::enqueue(metadata_holder); |
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406 } |
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407 |
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408 #endif |
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409 } |
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410 |
0 | 411 //------------------------------------------------------------------ |
412 // ciObjectFactory::get_unloaded_method | |
413 // | |
414 // Get the ciMethod representing an unloaded/unfound method. | |
415 // | |
416 // Implementation note: unloaded methods are currently stored in | |
417 // an unordered array, requiring a linear-time lookup for each | |
418 // unloaded method. This may need to change. | |
419 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
420 ciSymbol* name, | |
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421 ciSymbol* signature, |
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422 ciInstanceKlass* accessor) { |
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423 ciSignature* that = NULL; |
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424 for (int i = 0; i < _unloaded_methods->length(); i++) { |
0 | 425 ciMethod* entry = _unloaded_methods->at(i); |
426 if (entry->holder()->equals(holder) && | |
427 entry->name()->equals(name) && | |
428 entry->signature()->as_symbol()->equals(signature)) { | |
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429 // Short-circuit slow resolve. |
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430 if (entry->signature()->accessing_klass() == accessor) { |
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431 // We've found a match. |
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432 return entry; |
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433 } else { |
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434 // Lazily create ciSignature |
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435 if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
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436 if (entry->signature()->equals(that)) { |
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437 // We've found a match. |
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438 return entry; |
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439 } |
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440 } |
0 | 441 } |
442 } | |
443 | |
444 // This is a new unloaded method. Create it and stick it in | |
445 // the cache. | |
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446 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
0 | 447 |
448 init_ident_of(new_method); | |
449 _unloaded_methods->append(new_method); | |
450 | |
451 return new_method; | |
452 } | |
453 | |
454 //------------------------------------------------------------------ | |
455 // ciObjectFactory::get_unloaded_klass | |
456 // | |
457 // Get a ciKlass representing an unloaded klass. | |
458 // | |
459 // Implementation note: unloaded klasses are currently stored in | |
460 // an unordered array, requiring a linear-time lookup for each | |
461 // unloaded klass. This may need to change. | |
462 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
463 ciSymbol* name, | |
464 bool create_if_not_found) { | |
465 EXCEPTION_CONTEXT; | |
466 oop loader = NULL; | |
467 oop domain = NULL; | |
468 if (accessing_klass != NULL) { | |
469 loader = accessing_klass->loader(); | |
470 domain = accessing_klass->protection_domain(); | |
471 } | |
472 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
473 ciKlass* entry = _unloaded_klasses->at(i); | |
474 if (entry->name()->equals(name) && | |
475 entry->loader() == loader && | |
476 entry->protection_domain() == domain) { | |
477 // We've found a match. | |
478 return entry; | |
479 } | |
480 } | |
481 | |
482 if (!create_if_not_found) | |
483 return NULL; | |
484 | |
485 // This is a new unloaded klass. Create it and stick it in | |
486 // the cache. | |
487 ciKlass* new_klass = NULL; | |
488 | |
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489 // Two cases: this is an unloaded ObjArrayKlass or an |
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490 // unloaded InstanceKlass. Deal with both. |
0 | 491 if (name->byte_at(0) == '[') { |
492 // Decompose the name.' | |
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493 FieldArrayInfo fd; |
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494 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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495 fd, THREAD); |
0 | 496 if (HAS_PENDING_EXCEPTION) { |
497 CLEAR_PENDING_EXCEPTION; | |
498 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
499 return ciEnv::_unloaded_ciobjarrayklass; | |
500 } | |
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501 int dimension = fd.dimension(); |
0 | 502 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
503 ciKlass* element_klass = NULL; | |
504 if (element_type == T_OBJECT) { | |
505 ciEnv *env = CURRENT_THREAD_ENV; | |
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506 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
0 | 507 element_klass = |
508 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
509 } else { | |
510 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
511 | |
512 // The type array itself takes care of one of the dimensions. | |
513 dimension--; | |
514 | |
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515 // The element klass is a TypeArrayKlass. |
0 | 516 element_klass = ciTypeArrayKlass::make(element_type); |
517 } | |
518 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
519 } else { | |
520 jobject loader_handle = NULL; | |
521 jobject domain_handle = NULL; | |
522 if (accessing_klass != NULL) { | |
523 loader_handle = accessing_klass->loader_handle(); | |
524 domain_handle = accessing_klass->protection_domain_handle(); | |
525 } | |
526 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
527 } | |
528 init_ident_of(new_klass); | |
529 _unloaded_klasses->append(new_klass); | |
530 | |
531 return new_klass; | |
532 } | |
533 | |
1602 | 534 |
535 //------------------------------------------------------------------ | |
536 // ciObjectFactory::get_unloaded_instance | |
537 // | |
538 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
539 // | |
540 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
541 for (int i=0; i<_unloaded_instances->length(); i++) { | |
542 ciInstance* entry = _unloaded_instances->at(i); | |
543 if (entry->klass()->equals(instance_klass)) { | |
544 // We've found a match. | |
545 return entry; | |
546 } | |
547 } | |
548 | |
549 // This is a new unloaded instance. Create it and stick it in | |
550 // the cache. | |
551 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
552 | |
553 init_ident_of(new_instance); | |
554 _unloaded_instances->append(new_instance); | |
555 | |
556 // make sure it looks the way we want: | |
557 assert(!new_instance->is_loaded(), ""); | |
558 assert(new_instance->klass() == instance_klass, ""); | |
559 | |
560 return new_instance; | |
561 } | |
562 | |
563 | |
564 //------------------------------------------------------------------ | |
565 // ciObjectFactory::get_unloaded_klass_mirror | |
566 // | |
567 // Get a ciInstance representing an unresolved klass mirror. | |
568 // | |
569 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
570 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
571 assert(ciEnv::_Class_klass != NULL, ""); | |
572 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
573 } | |
574 | |
575 //------------------------------------------------------------------ | |
576 // ciObjectFactory::get_unloaded_method_handle_constant | |
577 // | |
578 // Get a ciInstance representing an unresolved method handle constant. | |
579 // | |
580 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
581 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
582 ciSymbol* name, | |
583 ciSymbol* signature, | |
584 int ref_kind) { | |
585 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
586 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
587 } | |
588 | |
589 //------------------------------------------------------------------ | |
590 // ciObjectFactory::get_unloaded_method_type_constant | |
591 // | |
592 // Get a ciInstance representing an unresolved method type constant. | |
593 // | |
594 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
595 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
596 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
597 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
598 } | |
599 | |
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600 ciInstance* ciObjectFactory::get_unloaded_object_constant() { |
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601 if (ciEnv::_Object_klass == NULL) return NULL; |
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602 return get_unloaded_instance(ciEnv::_Object_klass->as_instance_klass()); |
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603 } |
1602 | 604 |
0 | 605 //------------------------------------------------------------------ |
606 // ciObjectFactory::get_empty_methodData | |
607 // | |
608 // Get the ciMethodData representing the methodData for a method with | |
609 // none. | |
610 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
611 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
612 init_ident_of(new_methodData); | |
613 return new_methodData; | |
614 } | |
615 | |
616 //------------------------------------------------------------------ | |
617 // ciObjectFactory::get_return_address | |
618 // | |
619 // Get a ciReturnAddress for a specified bci. | |
620 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
621 for (int i=0; i<_return_addresses->length(); i++) { | |
622 ciReturnAddress* entry = _return_addresses->at(i); | |
623 if (entry->bci() == bci) { | |
624 // We've found a match. | |
625 return entry; | |
626 } | |
627 } | |
628 | |
629 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
630 init_ident_of(new_ret_addr); | |
631 _return_addresses->append(new_ret_addr); | |
632 return new_ret_addr; | |
633 } | |
634 | |
635 // ------------------------------------------------------------------ | |
636 // ciObjectFactory::init_ident_of | |
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637 void ciObjectFactory::init_ident_of(ciBaseObject* obj) { |
0 | 638 obj->set_ident(_next_ident++); |
639 } | |
640 | |
641 // ------------------------------------------------------------------ | |
642 // ciObjectFactory::find | |
643 // | |
644 // Use binary search to find the position of this oop in the cache. | |
645 // If there is no entry in the cache corresponding to this oop, return | |
646 // the position at which the oop should be inserted. | |
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647 int ciObjectFactory::find(Metadata* key, GrowableArray<ciMetadata*>* objects) { |
0 | 648 int min = 0; |
649 int max = objects->length()-1; | |
650 | |
651 // print_contents(); | |
652 | |
653 while (max >= min) { | |
654 int mid = (max + min) / 2; | |
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655 Metadata* value = objects->at(mid)->constant_encoding(); |
0 | 656 if (value < key) { |
657 min = mid + 1; | |
658 } else if (value > key) { | |
659 max = mid - 1; | |
660 } else { | |
661 return mid; | |
662 } | |
663 } | |
664 return min; | |
665 } | |
666 | |
667 // ------------------------------------------------------------------ | |
668 // ciObjectFactory::is_found_at | |
669 // | |
670 // Verify that the binary seach found the given key. | |
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671 bool ciObjectFactory::is_found_at(int index, Metadata* key, GrowableArray<ciMetadata*>* objects) { |
0 | 672 return (index < objects->length() && |
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673 objects->at(index)->constant_encoding() == key); |
0 | 674 } |
675 | |
676 | |
677 // ------------------------------------------------------------------ | |
678 // ciObjectFactory::insert | |
679 // | |
680 // Insert a ciObject into the table at some index. | |
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681 void ciObjectFactory::insert(int index, ciMetadata* obj, GrowableArray<ciMetadata*>* objects) { |
0 | 682 int len = objects->length(); |
683 if (len == index) { | |
684 objects->append(obj); | |
685 } else { | |
686 objects->append(objects->at(len-1)); | |
687 int pos; | |
688 for (pos = len-2; pos >= index; pos--) { | |
689 objects->at_put(pos+1,objects->at(pos)); | |
690 } | |
691 objects->at_put(index, obj); | |
692 } | |
693 } | |
694 | |
695 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
696 | |
697 // ------------------------------------------------------------------ | |
698 // ciObjectFactory::find_non_perm | |
699 // | |
700 // Use a small hash table, hashed on the klass of the key. | |
701 // If there is no entry in the cache corresponding to this oop, return | |
702 // the null tail of the bucket into which the oop should be inserted. | |
703 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
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704 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
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705 ciMetadata* klass = get_metadata(key->klass()); |
0 | 706 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; |
707 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
708 if (is_equal(p, key)) break; | |
709 } | |
710 return (*bp); | |
711 } | |
712 | |
713 | |
714 | |
715 // ------------------------------------------------------------------ | |
716 // Code for for NonPermObject | |
717 // | |
718 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
719 assert(ciObjectFactory::is_initialized(), ""); | |
720 _object = object; | |
721 _next = bucket; | |
722 bucket = this; | |
723 } | |
724 | |
725 | |
726 | |
727 // ------------------------------------------------------------------ | |
728 // ciObjectFactory::insert_non_perm | |
729 // | |
730 // Insert a ciObject into the non-perm table. | |
731 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
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732 assert(Universe::heap()->is_in_reserved_or_null(key), "must be"); |
0 | 733 assert(&where != &emptyBucket, "must not try to fill empty bucket"); |
734 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
735 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
736 assert(find_non_perm(key) == p, "must find the same spot"); | |
737 ++_non_perm_count; | |
738 } | |
739 | |
740 // ------------------------------------------------------------------ | |
741 // ciObjectFactory::vm_symbol_at | |
742 // Get the ciSymbol corresponding to some index in vmSymbols. | |
743 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
744 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
745 return _shared_ci_symbols[index]; | |
746 } | |
747 | |
748 // ------------------------------------------------------------------ | |
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749 // ciObjectFactory::metadata_do |
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750 void ciObjectFactory::metadata_do(void f(Metadata*)) { |
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751 if (_ci_metadata == NULL) return; |
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752 for (int j = 0; j< _ci_metadata->length(); j++) { |
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753 Metadata* o = _ci_metadata->at(j)->constant_encoding(); |
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754 f(o); |
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755 } |
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756 } |
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757 |
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758 // ------------------------------------------------------------------ |
0 | 759 // ciObjectFactory::print_contents_impl |
760 void ciObjectFactory::print_contents_impl() { | |
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761 int len = _ci_metadata->length(); |
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762 tty->print_cr("ciObjectFactory (%d) meta data contents:", len); |
0 | 763 for (int i=0; i<len; i++) { |
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764 _ci_metadata->at(i)->print(); |
0 | 765 tty->cr(); |
766 } | |
767 } | |
768 | |
769 // ------------------------------------------------------------------ | |
770 // ciObjectFactory::print_contents | |
771 void ciObjectFactory::print_contents() { | |
772 print(); | |
773 tty->cr(); | |
774 GUARDED_VM_ENTRY(print_contents_impl();) | |
775 } | |
776 | |
777 // ------------------------------------------------------------------ | |
778 // ciObjectFactory::print | |
779 // | |
780 // Print debugging information about the object factory | |
781 void ciObjectFactory::print() { | |
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782 tty->print("<ciObjectFactory oops=%d metadata=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
783 _non_perm_count, _ci_metadata->length(), _unloaded_methods->length(), |
1602 | 784 _unloaded_instances->length(), |
0 | 785 _unloaded_klasses->length()); |
786 } |