Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.cpp @ 5073:2db1ad9dd385
rename PiNode.value to PiNode.object and UnsafeCastNode.x to UnsafeCastNode.object
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 16:57:18 +0100 |
parents | 532be189cf09 |
children | 957c266d8bc5 |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciCPCache.hpp" | |
27 #include "ci/ciCallSite.hpp" | |
28 #include "ci/ciInstance.hpp" | |
29 #include "ci/ciInstanceKlass.hpp" | |
30 #include "ci/ciInstanceKlassKlass.hpp" | |
31 #include "ci/ciMethod.hpp" | |
32 #include "ci/ciMethodData.hpp" | |
33 #include "ci/ciMethodHandle.hpp" | |
34 #include "ci/ciMethodKlass.hpp" | |
35 #include "ci/ciNullObject.hpp" | |
36 #include "ci/ciObjArray.hpp" | |
37 #include "ci/ciObjArrayKlass.hpp" | |
38 #include "ci/ciObjArrayKlassKlass.hpp" | |
39 #include "ci/ciObjectFactory.hpp" | |
40 #include "ci/ciSymbol.hpp" | |
41 #include "ci/ciTypeArray.hpp" | |
42 #include "ci/ciTypeArrayKlass.hpp" | |
43 #include "ci/ciTypeArrayKlassKlass.hpp" | |
44 #include "ci/ciUtilities.hpp" | |
45 #include "classfile/systemDictionary.hpp" | |
46 #include "gc_interface/collectedHeap.inline.hpp" | |
47 #include "memory/allocation.inline.hpp" | |
48 #include "oops/oop.inline.hpp" | |
49 #include "oops/oop.inline2.hpp" | |
50 #include "runtime/fieldType.hpp" | |
0 | 51 |
52 // ciObjectFactory | |
53 // | |
54 // This class handles requests for the creation of new instances | |
55 // of ciObject and its subclasses. It contains a caching mechanism | |
56 // which ensures that for each oop, at most one ciObject is created. | |
57 // This invariant allows more efficient implementation of ciObject. | |
58 // | |
59 // Implementation note: the oop->ciObject mapping is represented as | |
60 // a table stored in an array. Even though objects are moved | |
61 // by the garbage collector, the compactor preserves their relative | |
62 // order; address comparison of oops (in perm space) is safe so long | |
63 // as we prohibit GC during our comparisons. We currently use binary | |
64 // search to find the oop in the table, and inserting a new oop | |
65 // into the table may be costly. If this cost ends up being | |
66 // problematic the underlying data structure can be switched to some | |
67 // sort of balanced binary tree. | |
68 | |
69 GrowableArray<ciObject*>* ciObjectFactory::_shared_ci_objects = NULL; | |
70 ciSymbol* ciObjectFactory::_shared_ci_symbols[vmSymbols::SID_LIMIT]; | |
71 int ciObjectFactory::_shared_ident_limit = 0; | |
72 volatile bool ciObjectFactory::_initialized = false; | |
73 | |
74 | |
75 // ------------------------------------------------------------------ | |
76 // ciObjectFactory::ciObjectFactory | |
77 ciObjectFactory::ciObjectFactory(Arena* arena, | |
78 int expected_size) { | |
79 | |
80 for (int i = 0; i < NON_PERM_BUCKETS; i++) { | |
81 _non_perm_bucket[i] = NULL; | |
82 } | |
83 _non_perm_count = 0; | |
84 | |
85 _next_ident = _shared_ident_limit; | |
86 _arena = arena; | |
87 _ci_objects = new (arena) GrowableArray<ciObject*>(arena, expected_size, 0, NULL); | |
88 | |
89 // If the shared ci objects exist append them to this factory's objects | |
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90 #ifndef GRAAL |
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91 if (_shared_ci_objects != NULL) { |
0 | 92 _ci_objects->appendAll(_shared_ci_objects); |
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93 } |
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94 #endif |
0 | 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. | |
115 Arena* arena = new Arena(); | |
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 { | |
129 // Create the shared symbols, but not in _shared_ci_objects. | |
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 | |
148 _ci_objects = new (_arena) GrowableArray<ciObject*>(_arena, 64, 0, NULL); | |
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) { |
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); | |
160 ciEnv::_method_klass_instance = | |
161 get(Universe::methodKlassObj())->as_method_klass(); | |
162 ciEnv::_klass_klass_instance = | |
163 get(Universe::klassKlassObj())->as_klass_klass(); | |
164 ciEnv::_instance_klass_klass_instance = | |
165 get(Universe::instanceKlassKlassObj()) | |
166 ->as_instance_klass_klass(); | |
167 ciEnv::_type_array_klass_klass_instance = | |
168 get(Universe::typeArrayKlassKlassObj()) | |
169 ->as_type_array_klass_klass(); | |
170 ciEnv::_obj_array_klass_klass_instance = | |
171 get(Universe::objArrayKlassKlassObj()) | |
172 ->as_obj_array_klass_klass(); | |
1142 | 173 |
174 #define WK_KLASS_DEFN(name, ignore_s, opt) \ | |
175 if (SystemDictionary::name() != NULL) \ | |
176 ciEnv::_##name = get(SystemDictionary::name())->as_instance_klass(); | |
177 | |
178 WK_KLASSES_DO(WK_KLASS_DEFN) | |
179 #undef WK_KLASS_DEFN | |
0 | 180 |
181 for (int len = -1; len != _ci_objects->length(); ) { | |
182 len = _ci_objects->length(); | |
183 for (int i2 = 0; i2 < len; i2++) { | |
184 ciObject* obj = _ci_objects->at(i2); | |
185 if (obj->is_loaded() && obj->is_instance_klass()) { | |
186 obj->as_instance_klass()->compute_nonstatic_fields(); | |
187 } | |
188 } | |
189 } | |
190 | |
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191 ciEnv::_unloaded_cisymbol = ciObjectFactory::get_symbol(vmSymbols::dummy_symbol()); |
0 | 192 // Create dummy instanceKlass and objArrayKlass object and assign them idents |
193 ciEnv::_unloaded_ciinstance_klass = new (_arena) ciInstanceKlass(ciEnv::_unloaded_cisymbol, NULL, NULL); | |
194 init_ident_of(ciEnv::_unloaded_ciinstance_klass); | |
195 ciEnv::_unloaded_ciobjarrayklass = new (_arena) ciObjArrayKlass(ciEnv::_unloaded_cisymbol, ciEnv::_unloaded_ciinstance_klass, 1); | |
196 init_ident_of(ciEnv::_unloaded_ciobjarrayklass); | |
197 assert(ciEnv::_unloaded_ciobjarrayklass->is_obj_array_klass(), "just checking"); | |
198 | |
199 get(Universe::boolArrayKlassObj()); | |
200 get(Universe::charArrayKlassObj()); | |
201 get(Universe::singleArrayKlassObj()); | |
202 get(Universe::doubleArrayKlassObj()); | |
203 get(Universe::byteArrayKlassObj()); | |
204 get(Universe::shortArrayKlassObj()); | |
205 get(Universe::intArrayKlassObj()); | |
206 get(Universe::longArrayKlassObj()); | |
207 | |
208 | |
209 | |
210 assert(_non_perm_count == 0, "no shared non-perm objects"); | |
211 | |
212 // The shared_ident_limit is the first ident number that will | |
213 // be used for non-shared objects. That is, numbers less than | |
214 // this limit are permanently assigned to shared CI objects, | |
215 // while the higher numbers are recycled afresh by each new ciEnv. | |
216 | |
217 _shared_ident_limit = _next_ident; | |
218 _shared_ci_objects = _ci_objects; | |
219 } | |
220 | |
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221 |
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222 ciSymbol* ciObjectFactory::get_symbol(Symbol* key) { |
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223 #ifndef GRAAL |
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224 vmSymbols::SID sid = vmSymbols::find_sid(key); |
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225 if (sid != vmSymbols::NO_SID) { |
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226 // do not pollute the main cache with it |
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227 return vm_symbol_at(sid); |
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228 } |
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229 |
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230 assert(vmSymbols::find_sid(key) == vmSymbols::NO_SID, ""); |
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231 #endif |
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232 |
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233 ciSymbol* s = new (arena()) ciSymbol(key, vmSymbols::NO_SID); |
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234 _symbols->push(s); |
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235 return s; |
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236 } |
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237 |
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238 // Decrement the refcount when done on symbols referenced by this compilation. |
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239 void ciObjectFactory::remove_symbols() { |
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240 for (int i = 0; i < _symbols->length(); i++) { |
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241 ciSymbol* s = _symbols->at(i); |
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242 s->get_symbol()->decrement_refcount(); |
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243 } |
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244 // Since _symbols is resource allocated we're not allowed to delete it |
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245 // but it'll go away just the same. |
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246 } |
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247 |
0 | 248 // ------------------------------------------------------------------ |
249 // ciObjectFactory::get | |
250 // | |
251 // Get the ciObject corresponding to some oop. If the ciObject has | |
252 // already been created, it is returned. Otherwise, a new ciObject | |
253 // is created. | |
254 ciObject* ciObjectFactory::get(oop key) { | |
255 ASSERT_IN_VM; | |
256 | |
257 #ifdef ASSERT | |
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258 if (CIObjectFactoryVerify) { |
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259 oop last = NULL; |
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260 for (int j = 0; j< _ci_objects->length(); j++) { |
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261 oop o = _ci_objects->at(j)->get_oop(); |
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262 assert(last < o, "out of order"); |
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263 last = o; |
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264 } |
0 | 265 } |
266 #endif // ASSERT | |
267 int len = _ci_objects->length(); | |
268 int index = find(key, _ci_objects); | |
269 #ifdef ASSERT | |
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270 if (CIObjectFactoryVerify) { |
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271 for (int i=0; i<_ci_objects->length(); i++) { |
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272 if (_ci_objects->at(i)->get_oop() == key) { |
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273 assert(index == i, " bad lookup"); |
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274 } |
0 | 275 } |
276 } | |
277 #endif | |
278 if (!is_found_at(index, key, _ci_objects)) { | |
279 // Check in the non-perm area before putting it in the list. | |
280 NonPermObject* &bucket = find_non_perm(key); | |
281 if (bucket != NULL) { | |
282 return bucket->object(); | |
283 } | |
284 | |
285 // The ciObject does not yet exist. Create it and insert it | |
286 // into the cache. | |
287 Handle keyHandle(key); | |
288 ciObject* new_object = create_new_object(keyHandle()); | |
289 assert(keyHandle() == new_object->get_oop(), "must be properly recorded"); | |
290 init_ident_of(new_object); | |
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291 if (!new_object->is_perm()) { |
0 | 292 // Not a perm-space object. |
293 insert_non_perm(bucket, keyHandle(), new_object); | |
294 return new_object; | |
295 } | |
296 if (len != _ci_objects->length()) { | |
297 // creating the new object has recursively entered new objects | |
298 // into the table. We need to recompute our index. | |
299 index = find(keyHandle(), _ci_objects); | |
300 } | |
301 assert(!is_found_at(index, keyHandle(), _ci_objects), "no double insert"); | |
302 insert(index, new_object, _ci_objects); | |
303 return new_object; | |
304 } | |
305 return _ci_objects->at(index); | |
306 } | |
307 | |
308 // ------------------------------------------------------------------ | |
309 // ciObjectFactory::create_new_object | |
310 // | |
311 // Create a new ciObject from an oop. | |
312 // | |
313 // Implementation note: this functionality could be virtual behavior | |
314 // of the oop itself. For now, we explicitly marshal the object. | |
315 ciObject* ciObjectFactory::create_new_object(oop o) { | |
316 EXCEPTION_CONTEXT; | |
317 | |
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318 if (o->is_klass()) { |
0 | 319 KlassHandle h_k(THREAD, (klassOop)o); |
320 Klass* k = ((klassOop)o)->klass_part(); | |
321 if (k->oop_is_instance()) { | |
322 return new (arena()) ciInstanceKlass(h_k); | |
323 } else if (k->oop_is_objArray()) { | |
324 return new (arena()) ciObjArrayKlass(h_k); | |
325 } else if (k->oop_is_typeArray()) { | |
326 return new (arena()) ciTypeArrayKlass(h_k); | |
327 } else if (k->oop_is_method()) { | |
328 return new (arena()) ciMethodKlass(h_k); | |
329 } else if (k->oop_is_klass()) { | |
330 if (k->oop_is_objArrayKlass()) { | |
331 return new (arena()) ciObjArrayKlassKlass(h_k); | |
332 } else if (k->oop_is_typeArrayKlass()) { | |
333 return new (arena()) ciTypeArrayKlassKlass(h_k); | |
334 } else if (k->oop_is_instanceKlass()) { | |
335 return new (arena()) ciInstanceKlassKlass(h_k); | |
336 } else { | |
337 assert(o == Universe::klassKlassObj(), "bad klassKlass"); | |
338 return new (arena()) ciKlassKlass(h_k); | |
339 } | |
340 } | |
341 } else if (o->is_method()) { | |
342 methodHandle h_m(THREAD, (methodOop)o); | |
343 return new (arena()) ciMethod(h_m); | |
344 } else if (o->is_methodData()) { | |
345 methodDataHandle h_md(THREAD, (methodDataOop)o); | |
346 return new (arena()) ciMethodData(h_md); | |
347 } else if (o->is_instance()) { | |
348 instanceHandle h_i(THREAD, (instanceOop)o); | |
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349 if (java_lang_invoke_CallSite::is_instance(o)) |
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350 return new (arena()) ciCallSite(h_i); |
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351 else if (java_lang_invoke_MethodHandle::is_instance(o)) |
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352 return new (arena()) ciMethodHandle(h_i); |
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353 else |
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354 return new (arena()) ciInstance(h_i); |
0 | 355 } else if (o->is_objArray()) { |
356 objArrayHandle h_oa(THREAD, (objArrayOop)o); | |
357 return new (arena()) ciObjArray(h_oa); | |
358 } else if (o->is_typeArray()) { | |
359 typeArrayHandle h_ta(THREAD, (typeArrayOop)o); | |
360 return new (arena()) ciTypeArray(h_ta); | |
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361 } else if (o->is_constantPoolCache()) { |
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362 constantPoolCacheHandle h_cpc(THREAD, (constantPoolCacheOop) o); |
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363 return new (arena()) ciCPCache(h_cpc); |
0 | 364 } |
365 | |
366 // The oop is of some type not supported by the compiler interface. | |
367 ShouldNotReachHere(); | |
368 return NULL; | |
369 } | |
370 | |
371 //------------------------------------------------------------------ | |
372 // ciObjectFactory::get_unloaded_method | |
373 // | |
374 // Get the ciMethod representing an unloaded/unfound method. | |
375 // | |
376 // Implementation note: unloaded methods are currently stored in | |
377 // an unordered array, requiring a linear-time lookup for each | |
378 // unloaded method. This may need to change. | |
379 ciMethod* ciObjectFactory::get_unloaded_method(ciInstanceKlass* holder, | |
380 ciSymbol* name, | |
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381 ciSymbol* signature, |
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382 ciInstanceKlass* accessor) { |
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383 ciSignature* that = NULL; |
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384 for (int i = 0; i < _unloaded_methods->length(); i++) { |
0 | 385 ciMethod* entry = _unloaded_methods->at(i); |
386 if (entry->holder()->equals(holder) && | |
387 entry->name()->equals(name) && | |
388 entry->signature()->as_symbol()->equals(signature)) { | |
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389 // Short-circuit slow resolve. |
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390 if (entry->signature()->accessing_klass() == accessor) { |
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391 // We've found a match. |
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392 return entry; |
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393 } else { |
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394 // Lazily create ciSignature |
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395 if (that == NULL) that = new (arena()) ciSignature(accessor, constantPoolHandle(), signature); |
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396 if (entry->signature()->equals(that)) { |
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397 // We've found a match. |
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398 return entry; |
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399 } |
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400 } |
0 | 401 } |
402 } | |
403 | |
404 // This is a new unloaded method. Create it and stick it in | |
405 // the cache. | |
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406 ciMethod* new_method = new (arena()) ciMethod(holder, name, signature, accessor); |
0 | 407 |
408 init_ident_of(new_method); | |
409 _unloaded_methods->append(new_method); | |
410 | |
411 return new_method; | |
412 } | |
413 | |
414 //------------------------------------------------------------------ | |
415 // ciObjectFactory::get_unloaded_klass | |
416 // | |
417 // Get a ciKlass representing an unloaded klass. | |
418 // | |
419 // Implementation note: unloaded klasses are currently stored in | |
420 // an unordered array, requiring a linear-time lookup for each | |
421 // unloaded klass. This may need to change. | |
422 ciKlass* ciObjectFactory::get_unloaded_klass(ciKlass* accessing_klass, | |
423 ciSymbol* name, | |
424 bool create_if_not_found) { | |
425 EXCEPTION_CONTEXT; | |
426 oop loader = NULL; | |
427 oop domain = NULL; | |
428 if (accessing_klass != NULL) { | |
429 loader = accessing_klass->loader(); | |
430 domain = accessing_klass->protection_domain(); | |
431 } | |
432 for (int i=0; i<_unloaded_klasses->length(); i++) { | |
433 ciKlass* entry = _unloaded_klasses->at(i); | |
434 if (entry->name()->equals(name) && | |
435 entry->loader() == loader && | |
436 entry->protection_domain() == domain) { | |
437 // We've found a match. | |
438 return entry; | |
439 } | |
440 } | |
441 | |
442 if (!create_if_not_found) | |
443 return NULL; | |
444 | |
445 // This is a new unloaded klass. Create it and stick it in | |
446 // the cache. | |
447 ciKlass* new_klass = NULL; | |
448 | |
449 // Two cases: this is an unloaded objArrayKlass or an | |
450 // unloaded instanceKlass. Deal with both. | |
451 if (name->byte_at(0) == '[') { | |
452 // Decompose the name.' | |
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453 FieldArrayInfo fd; |
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454 BasicType element_type = FieldType::get_array_info(name->get_symbol(), |
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455 fd, THREAD); |
0 | 456 if (HAS_PENDING_EXCEPTION) { |
457 CLEAR_PENDING_EXCEPTION; | |
458 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
459 return ciEnv::_unloaded_ciobjarrayklass; | |
460 } | |
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461 int dimension = fd.dimension(); |
0 | 462 assert(element_type != T_ARRAY, "unsuccessful decomposition"); |
463 ciKlass* element_klass = NULL; | |
464 if (element_type == T_OBJECT) { | |
465 ciEnv *env = CURRENT_THREAD_ENV; | |
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466 ciSymbol* ci_name = env->get_symbol(fd.object_key()); |
0 | 467 element_klass = |
468 env->get_klass_by_name(accessing_klass, ci_name, false)->as_instance_klass(); | |
469 } else { | |
470 assert(dimension > 1, "one dimensional type arrays are always loaded."); | |
471 | |
472 // The type array itself takes care of one of the dimensions. | |
473 dimension--; | |
474 | |
475 // The element klass is a typeArrayKlass. | |
476 element_klass = ciTypeArrayKlass::make(element_type); | |
477 } | |
478 new_klass = new (arena()) ciObjArrayKlass(name, element_klass, dimension); | |
479 } else { | |
480 jobject loader_handle = NULL; | |
481 jobject domain_handle = NULL; | |
482 if (accessing_klass != NULL) { | |
483 loader_handle = accessing_klass->loader_handle(); | |
484 domain_handle = accessing_klass->protection_domain_handle(); | |
485 } | |
486 new_klass = new (arena()) ciInstanceKlass(name, loader_handle, domain_handle); | |
487 } | |
488 init_ident_of(new_klass); | |
489 _unloaded_klasses->append(new_klass); | |
490 | |
491 return new_klass; | |
492 } | |
493 | |
1602 | 494 |
495 //------------------------------------------------------------------ | |
496 // ciObjectFactory::get_unloaded_instance | |
497 // | |
498 // Get a ciInstance representing an as-yet undetermined instance of a given class. | |
499 // | |
500 ciInstance* ciObjectFactory::get_unloaded_instance(ciInstanceKlass* instance_klass) { | |
501 for (int i=0; i<_unloaded_instances->length(); i++) { | |
502 ciInstance* entry = _unloaded_instances->at(i); | |
503 if (entry->klass()->equals(instance_klass)) { | |
504 // We've found a match. | |
505 return entry; | |
506 } | |
507 } | |
508 | |
509 // This is a new unloaded instance. Create it and stick it in | |
510 // the cache. | |
511 ciInstance* new_instance = new (arena()) ciInstance(instance_klass); | |
512 | |
513 init_ident_of(new_instance); | |
514 _unloaded_instances->append(new_instance); | |
515 | |
516 // make sure it looks the way we want: | |
517 assert(!new_instance->is_loaded(), ""); | |
518 assert(new_instance->klass() == instance_klass, ""); | |
519 | |
520 return new_instance; | |
521 } | |
522 | |
523 | |
524 //------------------------------------------------------------------ | |
525 // ciObjectFactory::get_unloaded_klass_mirror | |
526 // | |
527 // Get a ciInstance representing an unresolved klass mirror. | |
528 // | |
529 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
530 ciInstance* ciObjectFactory::get_unloaded_klass_mirror(ciKlass* type) { | |
531 assert(ciEnv::_Class_klass != NULL, ""); | |
532 return get_unloaded_instance(ciEnv::_Class_klass->as_instance_klass()); | |
533 } | |
534 | |
535 //------------------------------------------------------------------ | |
536 // ciObjectFactory::get_unloaded_method_handle_constant | |
537 // | |
538 // Get a ciInstance representing an unresolved method handle constant. | |
539 // | |
540 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
541 ciInstance* ciObjectFactory::get_unloaded_method_handle_constant(ciKlass* holder, | |
542 ciSymbol* name, | |
543 ciSymbol* signature, | |
544 int ref_kind) { | |
545 if (ciEnv::_MethodHandle_klass == NULL) return NULL; | |
546 return get_unloaded_instance(ciEnv::_MethodHandle_klass->as_instance_klass()); | |
547 } | |
548 | |
549 //------------------------------------------------------------------ | |
550 // ciObjectFactory::get_unloaded_method_type_constant | |
551 // | |
552 // Get a ciInstance representing an unresolved method type constant. | |
553 // | |
554 // Currently, this ignores the parameters and returns a unique unloaded instance. | |
555 ciInstance* ciObjectFactory::get_unloaded_method_type_constant(ciSymbol* signature) { | |
556 if (ciEnv::_MethodType_klass == NULL) return NULL; | |
557 return get_unloaded_instance(ciEnv::_MethodType_klass->as_instance_klass()); | |
558 } | |
559 | |
560 | |
561 | |
0 | 562 //------------------------------------------------------------------ |
563 // ciObjectFactory::get_empty_methodData | |
564 // | |
565 // Get the ciMethodData representing the methodData for a method with | |
566 // none. | |
567 ciMethodData* ciObjectFactory::get_empty_methodData() { | |
568 ciMethodData* new_methodData = new (arena()) ciMethodData(); | |
569 init_ident_of(new_methodData); | |
570 return new_methodData; | |
571 } | |
572 | |
573 //------------------------------------------------------------------ | |
574 // ciObjectFactory::get_return_address | |
575 // | |
576 // Get a ciReturnAddress for a specified bci. | |
577 ciReturnAddress* ciObjectFactory::get_return_address(int bci) { | |
578 for (int i=0; i<_return_addresses->length(); i++) { | |
579 ciReturnAddress* entry = _return_addresses->at(i); | |
580 if (entry->bci() == bci) { | |
581 // We've found a match. | |
582 return entry; | |
583 } | |
584 } | |
585 | |
586 ciReturnAddress* new_ret_addr = new (arena()) ciReturnAddress(bci); | |
587 init_ident_of(new_ret_addr); | |
588 _return_addresses->append(new_ret_addr); | |
589 return new_ret_addr; | |
590 } | |
591 | |
592 // ------------------------------------------------------------------ | |
593 // ciObjectFactory::init_ident_of | |
594 void ciObjectFactory::init_ident_of(ciObject* obj) { | |
595 obj->set_ident(_next_ident++); | |
596 } | |
597 | |
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598 void ciObjectFactory::init_ident_of(ciSymbol* obj) { |
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599 obj->set_ident(_next_ident++); |
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600 } |
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601 |
0 | 602 |
603 // ------------------------------------------------------------------ | |
604 // ciObjectFactory::find | |
605 // | |
606 // Use binary search to find the position of this oop in the cache. | |
607 // If there is no entry in the cache corresponding to this oop, return | |
608 // the position at which the oop should be inserted. | |
609 int ciObjectFactory::find(oop key, GrowableArray<ciObject*>* objects) { | |
610 int min = 0; | |
611 int max = objects->length()-1; | |
612 | |
613 // print_contents(); | |
614 | |
615 while (max >= min) { | |
616 int mid = (max + min) / 2; | |
617 oop value = objects->at(mid)->get_oop(); | |
618 if (value < key) { | |
619 min = mid + 1; | |
620 } else if (value > key) { | |
621 max = mid - 1; | |
622 } else { | |
623 return mid; | |
624 } | |
625 } | |
626 return min; | |
627 } | |
628 | |
629 // ------------------------------------------------------------------ | |
630 // ciObjectFactory::is_found_at | |
631 // | |
632 // Verify that the binary seach found the given key. | |
633 bool ciObjectFactory::is_found_at(int index, oop key, GrowableArray<ciObject*>* objects) { | |
634 return (index < objects->length() && | |
635 objects->at(index)->get_oop() == key); | |
636 } | |
637 | |
638 | |
639 // ------------------------------------------------------------------ | |
640 // ciObjectFactory::insert | |
641 // | |
642 // Insert a ciObject into the table at some index. | |
643 void ciObjectFactory::insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects) { | |
644 int len = objects->length(); | |
645 if (len == index) { | |
646 objects->append(obj); | |
647 } else { | |
648 objects->append(objects->at(len-1)); | |
649 int pos; | |
650 for (pos = len-2; pos >= index; pos--) { | |
651 objects->at_put(pos+1,objects->at(pos)); | |
652 } | |
653 objects->at_put(index, obj); | |
654 } | |
655 #ifdef ASSERT | |
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656 if (CIObjectFactoryVerify) { |
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657 oop last = NULL; |
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658 for (int j = 0; j< objects->length(); j++) { |
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659 oop o = objects->at(j)->get_oop(); |
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660 assert(last < o, "out of order"); |
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661 last = o; |
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662 } |
0 | 663 } |
664 #endif // ASSERT | |
665 } | |
666 | |
667 static ciObjectFactory::NonPermObject* emptyBucket = NULL; | |
668 | |
669 // ------------------------------------------------------------------ | |
670 // ciObjectFactory::find_non_perm | |
671 // | |
672 // Use a small hash table, hashed on the klass of the key. | |
673 // If there is no entry in the cache corresponding to this oop, return | |
674 // the null tail of the bucket into which the oop should be inserted. | |
675 ciObjectFactory::NonPermObject* &ciObjectFactory::find_non_perm(oop key) { | |
676 // Be careful: is_perm might change from false to true. | |
677 // Thus, there might be a matching perm object in the table. | |
678 // If there is, this probe must find it. | |
679 if (key->is_perm() && _non_perm_count == 0) { | |
680 return emptyBucket; | |
681 } else if (key->is_instance()) { | |
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682 if (key->klass() == SystemDictionary::Class_klass() && JavaObjectsInPerm) { |
0 | 683 // class mirror instances are always perm |
684 return emptyBucket; | |
685 } | |
686 // fall through to probe | |
687 } else if (key->is_array()) { | |
688 // fall through to probe | |
689 } else { | |
690 // not an array or instance | |
691 return emptyBucket; | |
692 } | |
693 | |
694 ciObject* klass = get(key->klass()); | |
695 NonPermObject* *bp = &_non_perm_bucket[(unsigned) klass->hash() % NON_PERM_BUCKETS]; | |
696 for (NonPermObject* p; (p = (*bp)) != NULL; bp = &p->next()) { | |
697 if (is_equal(p, key)) break; | |
698 } | |
699 return (*bp); | |
700 } | |
701 | |
702 | |
703 | |
704 // ------------------------------------------------------------------ | |
705 // Code for for NonPermObject | |
706 // | |
707 inline ciObjectFactory::NonPermObject::NonPermObject(ciObjectFactory::NonPermObject* &bucket, oop key, ciObject* object) { | |
708 assert(ciObjectFactory::is_initialized(), ""); | |
709 _object = object; | |
710 _next = bucket; | |
711 bucket = this; | |
712 } | |
713 | |
714 | |
715 | |
716 // ------------------------------------------------------------------ | |
717 // ciObjectFactory::insert_non_perm | |
718 // | |
719 // Insert a ciObject into the non-perm table. | |
720 void ciObjectFactory::insert_non_perm(ciObjectFactory::NonPermObject* &where, oop key, ciObject* obj) { | |
721 assert(&where != &emptyBucket, "must not try to fill empty bucket"); | |
722 NonPermObject* p = new (arena()) NonPermObject(where, key, obj); | |
723 assert(where == p && is_equal(p, key) && p->object() == obj, "entry must match"); | |
724 assert(find_non_perm(key) == p, "must find the same spot"); | |
725 ++_non_perm_count; | |
726 } | |
727 | |
728 // ------------------------------------------------------------------ | |
729 // ciObjectFactory::vm_symbol_at | |
730 // Get the ciSymbol corresponding to some index in vmSymbols. | |
731 ciSymbol* ciObjectFactory::vm_symbol_at(int index) { | |
732 assert(index >= vmSymbols::FIRST_SID && index < vmSymbols::SID_LIMIT, "oob"); | |
733 return _shared_ci_symbols[index]; | |
734 } | |
735 | |
736 // ------------------------------------------------------------------ | |
737 // ciObjectFactory::print_contents_impl | |
738 void ciObjectFactory::print_contents_impl() { | |
739 int len = _ci_objects->length(); | |
740 tty->print_cr("ciObjectFactory (%d) oop contents:", len); | |
741 for (int i=0; i<len; i++) { | |
742 _ci_objects->at(i)->print(); | |
743 tty->cr(); | |
744 } | |
745 } | |
746 | |
747 // ------------------------------------------------------------------ | |
748 // ciObjectFactory::print_contents | |
749 void ciObjectFactory::print_contents() { | |
750 print(); | |
751 tty->cr(); | |
752 GUARDED_VM_ENTRY(print_contents_impl();) | |
753 } | |
754 | |
755 // ------------------------------------------------------------------ | |
756 // ciObjectFactory::print | |
757 // | |
758 // Print debugging information about the object factory | |
759 void ciObjectFactory::print() { | |
1602 | 760 tty->print("<ciObjectFactory oops=%d unloaded_methods=%d unloaded_instances=%d unloaded_klasses=%d>", |
0 | 761 _ci_objects->length(), _unloaded_methods->length(), |
1602 | 762 _unloaded_instances->length(), |
0 | 763 _unloaded_klasses->length()); |
764 } |