Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "reg_type.h" |
| 18 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 19 | |
| 20 | #include "base/casts.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 21 | #include "dex_file-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 22 | #include "mirror/class.h" |
| 23 | #include "mirror/class-inl.h" |
| 24 | #include "mirror/object-inl.h" |
Ian Rogers | 693ff61 | 2013-02-01 10:56:12 -0800 | [diff] [blame] | 25 | #include "mirror/object_array-inl.h" |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 26 | #include "object_utils.h" |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 27 | #include "reg_type_cache-inl.h" |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 28 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 29 | #include <limits> |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 30 | #include <sstream> |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 31 | |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 32 | namespace art { |
| 33 | namespace verifier { |
| 34 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 35 | UndefinedType* UndefinedType::instance_ = NULL; |
| 36 | ConflictType* ConflictType::instance_ = NULL; |
| 37 | BooleanType* BooleanType::instance = NULL; |
| 38 | ByteType* ByteType::instance_ = NULL; |
| 39 | ShortType* ShortType::instance_ = NULL; |
| 40 | CharType* CharType::instance_ = NULL; |
| 41 | FloatType* FloatType::instance_ = NULL; |
| 42 | LongLoType* LongLoType::instance_ = NULL; |
| 43 | LongHiType* LongHiType::instance_ = NULL; |
| 44 | DoubleLoType* DoubleLoType::instance_ = NULL; |
| 45 | DoubleHiType* DoubleHiType::instance_ = NULL; |
| 46 | IntegerType* IntegerType::instance_ = NULL; |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 47 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 48 | std::string PreciseConstType::Dump() const { |
| 49 | std::stringstream result; |
| 50 | uint32_t val = ConstantValue(); |
| 51 | if (val == 0) { |
| 52 | CHECK(IsPreciseConstant()); |
| 53 | result << "Zero/null"; |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 54 | } else { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 55 | result << "Precise "; |
| 56 | if (IsConstantShort()) { |
| 57 | result << StringPrintf("Constant: %d", val); |
| 58 | } else { |
| 59 | result << StringPrintf("Constant: 0x%x", val); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 60 | } |
| 61 | } |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 62 | return result.str(); |
| 63 | } |
| 64 | |
| 65 | std::string BooleanType::Dump() const { |
| 66 | return "boolean"; |
| 67 | } |
| 68 | |
| 69 | std::string ConflictType::Dump() const { |
| 70 | return "Conflict"; |
| 71 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 72 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 73 | std::string ByteType::Dump() const { |
| 74 | return "Byte"; |
| 75 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 76 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 77 | std::string ShortType::Dump() const { |
| 78 | return "short"; |
| 79 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 80 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 81 | std::string CharType::Dump() const { |
| 82 | return "Char"; |
| 83 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 84 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 85 | std::string FloatType::Dump() const { |
| 86 | return "float"; |
| 87 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 88 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 89 | std::string LongLoType::Dump() const { |
| 90 | return "long (Low Half)"; |
| 91 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 92 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 93 | std::string LongHiType::Dump() const { |
| 94 | return "long (High Half)"; |
| 95 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 96 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 97 | std::string DoubleLoType::Dump() const { |
| 98 | return "Double (Low Half)"; |
| 99 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 100 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 101 | std::string DoubleHiType::Dump() const { |
| 102 | return "Double (High Half)"; |
| 103 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 104 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 105 | std::string IntegerType::Dump() const { |
| 106 | return "Integer"; |
| 107 | } |
| 108 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 109 | DoubleHiType* DoubleHiType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 110 | uint16_t cache_id) { |
| 111 | if (instance_ == NULL) { |
| 112 | instance_ = new DoubleHiType(klass, descriptor, cache_id); |
| 113 | } |
| 114 | return instance_; |
| 115 | } |
| 116 | |
| 117 | DoubleHiType* DoubleHiType::GetInstance() { |
| 118 | CHECK(instance_ != NULL); |
| 119 | return instance_; |
| 120 | } |
| 121 | |
| 122 | void DoubleHiType::Destroy() { |
| 123 | if (instance_ != NULL) { |
| 124 | delete instance_; |
| 125 | instance_ = NULL; |
| 126 | } |
| 127 | } |
| 128 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 129 | DoubleLoType* DoubleLoType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 130 | uint16_t cache_id) { |
| 131 | if (instance_ == NULL) { |
| 132 | instance_ = new DoubleLoType(klass, descriptor, cache_id); |
| 133 | } |
| 134 | return instance_; |
| 135 | } |
| 136 | |
| 137 | DoubleLoType* DoubleLoType::GetInstance() { |
| 138 | CHECK(instance_ != NULL); |
| 139 | return instance_; |
| 140 | } |
| 141 | |
| 142 | void DoubleLoType::Destroy() { |
| 143 | if (instance_ != NULL) { |
| 144 | delete instance_; |
| 145 | instance_ = NULL; |
| 146 | } |
| 147 | } |
| 148 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 149 | LongLoType* LongLoType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 150 | uint16_t cache_id) { |
| 151 | if (instance_ == NULL) { |
| 152 | instance_ = new LongLoType(klass, descriptor, cache_id); |
| 153 | } |
| 154 | return instance_; |
| 155 | } |
| 156 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 157 | LongHiType* LongHiType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 158 | uint16_t cache_id) { |
| 159 | if (instance_ == NULL) { |
| 160 | instance_ = new LongHiType(klass, descriptor, cache_id); |
| 161 | } |
| 162 | return instance_; |
| 163 | } |
| 164 | |
| 165 | LongHiType* LongHiType::GetInstance() { |
| 166 | CHECK(instance_ != NULL); |
| 167 | return instance_; |
| 168 | } |
| 169 | |
| 170 | void LongHiType::Destroy() { |
| 171 | if (instance_ != NULL) { |
| 172 | delete instance_; |
| 173 | instance_ = NULL; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | LongLoType* LongLoType::GetInstance() { |
| 178 | CHECK (instance_ != NULL); |
| 179 | return instance_; |
| 180 | } |
| 181 | |
| 182 | void LongLoType::Destroy() { |
| 183 | if (instance_ != NULL) { |
| 184 | delete instance_; |
| 185 | instance_ = NULL; |
| 186 | } |
| 187 | } |
| 188 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 189 | FloatType* FloatType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
| 190 | uint16_t cache_id) { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 191 | if (instance_ == NULL) { |
| 192 | instance_ = new FloatType(klass, descriptor, cache_id); |
| 193 | } |
| 194 | return instance_; |
| 195 | } |
| 196 | FloatType* FloatType::GetInstance() { |
| 197 | CHECK(instance_ != NULL); |
| 198 | return instance_; |
| 199 | } |
| 200 | |
| 201 | void FloatType::Destroy() { |
| 202 | if (instance_ != NULL) { |
| 203 | delete instance_; |
| 204 | instance_ = NULL; |
| 205 | } |
| 206 | } |
| 207 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 208 | CharType* CharType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 209 | uint16_t cache_id) { |
| 210 | if (instance_ == NULL) { |
| 211 | instance_ = new CharType(klass, descriptor, cache_id); |
| 212 | } |
| 213 | return instance_; |
| 214 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 215 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 216 | CharType* CharType::GetInstance() { |
| 217 | CHECK(instance_ != NULL); |
| 218 | return instance_; |
| 219 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 220 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 221 | void CharType::Destroy() { |
| 222 | if (instance_ != NULL) { |
| 223 | delete instance_; |
| 224 | instance_ = NULL; |
| 225 | } |
| 226 | } |
| 227 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 228 | ShortType* ShortType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 229 | uint16_t cache_id) { |
| 230 | if (instance_ == NULL) { |
| 231 | instance_ = new ShortType(klass, descriptor, cache_id); |
| 232 | } |
| 233 | return instance_; |
| 234 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 235 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 236 | ShortType* ShortType::GetInstance() { |
| 237 | CHECK(instance_ != NULL); |
| 238 | return instance_; |
| 239 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 240 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 241 | void ShortType::Destroy() { |
| 242 | if (instance_ != NULL) { |
| 243 | delete instance_; |
| 244 | instance_ = NULL; |
| 245 | } |
| 246 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 247 | |
| 248 | ByteType* ByteType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
| 249 | uint16_t cache_id) { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 250 | if (instance_ == NULL) { |
| 251 | instance_ = new ByteType(klass, descriptor, cache_id); |
| 252 | } |
| 253 | return instance_; |
| 254 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 255 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 256 | ByteType* ByteType::GetInstance() { |
| 257 | CHECK(instance_ != NULL); |
| 258 | return instance_; |
| 259 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 260 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 261 | void ByteType::Destroy() { |
| 262 | if (instance_ != NULL) { |
| 263 | delete instance_; |
| 264 | instance_ = NULL; |
| 265 | } |
| 266 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 267 | |
| 268 | IntegerType* IntegerType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 269 | uint16_t cache_id) { |
| 270 | if (instance_ == NULL) { |
| 271 | instance_ = new IntegerType(klass, descriptor, cache_id); |
| 272 | } |
| 273 | return instance_; |
| 274 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 275 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 276 | IntegerType* IntegerType::GetInstance() { |
| 277 | CHECK(instance_ != NULL); |
| 278 | return instance_; |
| 279 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 280 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 281 | void IntegerType::Destroy() { |
| 282 | if (instance_ != NULL) { |
| 283 | delete instance_; |
| 284 | instance_ = NULL; |
| 285 | } |
| 286 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 287 | |
| 288 | ConflictType* ConflictType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 289 | uint16_t cache_id) { |
| 290 | if (instance_ == NULL) { |
| 291 | instance_ = new ConflictType(klass, descriptor, cache_id); |
| 292 | } |
| 293 | return instance_; |
| 294 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 295 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 296 | ConflictType* ConflictType::GetInstance() { |
| 297 | CHECK(instance_ != NULL); |
| 298 | return instance_; |
| 299 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 300 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 301 | void ConflictType::Destroy() { |
| 302 | if (instance_ != NULL) { |
| 303 | delete instance_; |
| 304 | instance_ = NULL; |
| 305 | } |
| 306 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 307 | |
| 308 | BooleanType* BooleanType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 309 | uint16_t cache_id) { |
| 310 | if (BooleanType::instance == NULL) { |
| 311 | instance = new BooleanType(klass, descriptor, cache_id); |
| 312 | } |
| 313 | return BooleanType::instance; |
| 314 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 315 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 316 | BooleanType* BooleanType::GetInstance() { |
| 317 | CHECK(BooleanType::instance != NULL); |
| 318 | return BooleanType::instance; |
| 319 | } |
| 320 | |
| 321 | void BooleanType::Destroy() { |
| 322 | if(BooleanType::instance != NULL) { |
| 323 | delete instance; |
| 324 | instance = NULL; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | std::string UndefinedType::Dump() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 329 | return "Undefined"; |
| 330 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 331 | |
| 332 | UndefinedType* UndefinedType::CreateInstance(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 333 | uint16_t cache_id) { |
| 334 | if (instance_ == NULL) { |
| 335 | instance_ = new UndefinedType(klass, descriptor, cache_id); |
| 336 | } |
| 337 | return instance_; |
| 338 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 339 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 340 | UndefinedType* UndefinedType::GetInstance() { |
| 341 | CHECK(instance_ != NULL); |
| 342 | return instance_; |
| 343 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 344 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 345 | void UndefinedType::Destroy() { |
| 346 | if (instance_ != NULL) { |
| 347 | delete instance_; |
| 348 | instance_ = NULL; |
| 349 | } |
| 350 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 351 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 352 | std::string UnresolvedMergedType::Dump() const { |
| 353 | std::stringstream result; |
| 354 | std::set<uint16_t> types = GetMergedTypes(); |
| 355 | result << "UnresolvedMergedReferences("; |
| 356 | typedef std::set<uint16_t>::const_iterator It; // TODO: C++0x auto |
| 357 | It it = types.begin(); |
| 358 | result << reg_type_cache_->GetFromId(*it).Dump(); |
| 359 | for (++it; it != types.end(); ++it) { |
| 360 | result << ", "; |
| 361 | result << reg_type_cache_->GetFromId(*it).Dump(); |
| 362 | } |
| 363 | result << ")"; |
| 364 | return result.str(); |
| 365 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 366 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 367 | std::string UnresolvedSuperClass::Dump() const { |
| 368 | std::stringstream result; |
| 369 | uint16_t super_type_id = GetUnresolvedSuperClassChildId(); |
| 370 | result << "UnresolvedSuperClass(" << reg_type_cache_->GetFromId(super_type_id).Dump() << ")"; |
| 371 | return result.str(); |
| 372 | } |
| 373 | |
| 374 | std::string UnresolvedReferenceType::Dump() const { |
| 375 | std::stringstream result; |
| 376 | result << "Unresolved Reference" << ": " << PrettyDescriptor(GetDescriptor()); |
| 377 | return result.str(); |
| 378 | } |
| 379 | |
| 380 | std::string UnresolvedUninitializedRefType::Dump() const { |
| 381 | std::stringstream result; |
| 382 | result << "Unresolved And Uninitialized Reference" << ": " << PrettyDescriptor(GetDescriptor()); |
| 383 | result << " Allocation PC: " << GetAllocationPc(); |
| 384 | return result.str(); |
| 385 | } |
| 386 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 387 | std::string UnresolvedUninitializedThisRefType::Dump() const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 388 | std::stringstream result; |
| 389 | result << "Unresolved And Uninitialized This Reference" << PrettyDescriptor(GetDescriptor()); |
| 390 | return result.str(); |
| 391 | } |
| 392 | |
| 393 | std::string ReferenceType::Dump() const { |
| 394 | std::stringstream result; |
| 395 | result << "Reference" << ": " << PrettyDescriptor(GetClass()); |
| 396 | return result.str(); |
| 397 | } |
| 398 | |
| 399 | std::string PreciseReferenceType::Dump() const { |
| 400 | std::stringstream result; |
| 401 | result << "Precise Reference" << ": "<< PrettyDescriptor(GetClass()); |
| 402 | return result.str(); |
| 403 | } |
| 404 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 405 | std::string UninitializedReferenceType::Dump() const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 406 | std::stringstream result; |
| 407 | result << "Uninitialized Reference" << ": " << PrettyDescriptor(GetClass()); |
| 408 | result << " Allocation PC: " << GetAllocationPc(); |
| 409 | return result.str(); |
| 410 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 411 | |
| 412 | std::string UninitializedThisReferenceType::Dump() const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 413 | std::stringstream result; |
| 414 | result << "Uninitialized This Reference" << ": " << PrettyDescriptor(GetClass()); |
| 415 | result << "Allocation PC: " << GetAllocationPc(); |
| 416 | return result.str(); |
| 417 | } |
| 418 | |
| 419 | std::string ImpreciseConstType::Dump() const { |
| 420 | std::stringstream result; |
| 421 | uint32_t val = ConstantValue(); |
| 422 | if (val == 0) { |
| 423 | CHECK(IsPreciseConstant()); |
| 424 | result << "Zero/null"; |
| 425 | } else { |
| 426 | result << "Imprecise "; |
| 427 | if (IsConstantShort()) { |
| 428 | result << StringPrintf("Constant: %d", val); |
| 429 | } else { |
| 430 | result << StringPrintf("Constant: 0x%x", val); |
| 431 | } |
| 432 | } |
| 433 | return result.str(); |
| 434 | } |
| 435 | std::string PreciseConstLoType::Dump() const { |
| 436 | std::stringstream result; |
| 437 | |
| 438 | int32_t val = ConstantValueLo(); |
| 439 | result << "Precise "; |
| 440 | if (val >= std::numeric_limits<jshort>::min() && |
| 441 | val <= std::numeric_limits<jshort>::max()) { |
| 442 | result << StringPrintf("Low-half Constant: %d", val); |
| 443 | } else { |
| 444 | result << StringPrintf("Low-half Constant: 0x%x", val); |
| 445 | } |
| 446 | return result.str(); |
| 447 | } |
| 448 | |
| 449 | std::string ImpreciseConstLoType::Dump() const { |
| 450 | std::stringstream result; |
| 451 | |
| 452 | int32_t val = ConstantValueLo(); |
| 453 | result << "Imprecise "; |
| 454 | if (val >= std::numeric_limits<jshort>::min() && |
| 455 | val <= std::numeric_limits<jshort>::max()) { |
| 456 | result << StringPrintf("Low-half Constant: %d", val); |
| 457 | } else { |
| 458 | result << StringPrintf("Low-half Constant: 0x%x", val); |
| 459 | } |
| 460 | return result.str(); |
| 461 | } |
| 462 | |
| 463 | std::string PreciseConstHiType::Dump() const { |
| 464 | std::stringstream result; |
| 465 | int32_t val = ConstantValueHi(); |
| 466 | result << "Precise "; |
| 467 | if (val >= std::numeric_limits<jshort>::min() && |
| 468 | val <= std::numeric_limits<jshort>::max()) { |
| 469 | result << StringPrintf("High-half Constant: %d", val); |
| 470 | } else { |
| 471 | result << StringPrintf("High-half Constant: 0x%x", val); |
| 472 | } |
| 473 | return result.str(); |
| 474 | } |
| 475 | |
| 476 | std::string ImpreciseConstHiType::Dump() const { |
| 477 | std::stringstream result; |
| 478 | int32_t val = ConstantValueHi(); |
| 479 | result << "Imprecise "; |
| 480 | if (val >= std::numeric_limits<jshort>::min() && |
| 481 | val <= std::numeric_limits<jshort>::max()) { |
| 482 | result << StringPrintf("High-half Constant: %d", val); |
| 483 | } else { |
| 484 | result << StringPrintf("High-half Constant: 0x%x", val); |
| 485 | } |
| 486 | return result.str(); |
| 487 | } |
| 488 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 489 | BooleanType::BooleanType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 490 | : RegType(klass, descriptor, cache_id) { |
| 491 | } |
| 492 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 493 | ConflictType::ConflictType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 494 | : RegType(klass, descriptor, cache_id) { |
| 495 | } |
| 496 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 497 | ByteType::ByteType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 498 | : RegType(klass, descriptor, cache_id) { |
| 499 | } |
| 500 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 501 | ShortType::ShortType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 502 | : RegType(klass, descriptor, cache_id) { |
| 503 | } |
| 504 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 505 | CharType::CharType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 506 | : RegType(klass, descriptor, cache_id) { |
| 507 | } |
| 508 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 509 | IntegerType::IntegerType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 510 | : RegType(klass, descriptor, cache_id) { |
| 511 | } |
| 512 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 513 | ConstantType::ConstantType(uint32_t constant, uint16_t cache_id) |
| 514 | : RegType(NULL, "", cache_id), constant_(constant) { |
| 515 | } |
| 516 | |
| 517 | ReferenceType::ReferenceType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
| 518 | : RegType(klass, descriptor, cache_id) { |
| 519 | } |
| 520 | |
| 521 | PreciseReferenceType::PreciseReferenceType(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 522 | uint16_t cache_id) |
| 523 | : RegType(klass, descriptor, cache_id) { |
Sameer Abu Asal | 02c4223 | 2013-04-30 12:09:45 -0700 | [diff] [blame] | 524 | DCHECK(klass->IsInstantiable()); |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 525 | } |
| 526 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 527 | UnresolvedUninitializedThisRefType::UnresolvedUninitializedThisRefType(const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 528 | uint16_t cache_id) |
| 529 | : UninitializedType(NULL, descriptor, 0, cache_id) { |
| 530 | } |
| 531 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 532 | UnresolvedUninitializedRefType::UnresolvedUninitializedRefType(const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 533 | uint32_t allocation_pc, uint16_t cache_id) |
| 534 | : UninitializedType(NULL, descriptor, allocation_pc, cache_id) { |
| 535 | } |
| 536 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 537 | UninitializedReferenceType::UninitializedReferenceType(mirror::Class* klass, |
| 538 | const std::string& descriptor, |
| 539 | uint32_t allocation_pc, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 540 | : UninitializedType(klass, descriptor, allocation_pc, cache_id) { |
| 541 | } |
| 542 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 543 | LongHiType::LongHiType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 544 | : RegType(klass, descriptor, cache_id) { |
| 545 | } |
| 546 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 547 | FloatType::FloatType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 548 | : RegType(klass, descriptor, cache_id) { |
| 549 | } |
| 550 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 551 | DoubleLoType::DoubleLoType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 552 | : RegType(klass, descriptor, cache_id) { |
| 553 | } |
| 554 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 555 | DoubleHiType::DoubleHiType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 556 | : RegType(klass, descriptor, cache_id) { |
| 557 | } |
| 558 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 559 | LongLoType::LongLoType(mirror::Class* klass, const std::string& descriptor, uint16_t cache_id) |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 560 | : RegType(klass, descriptor, cache_id) { |
| 561 | } |
| 562 | |
| 563 | const RegType& UndefinedType::Merge(const RegType& incoming_type, RegTypeCache* reg_types) const |
| 564 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 565 | if (incoming_type.IsUndefined()) { |
| 566 | return *this; // Undefined MERGE Undefined => Undefined |
| 567 | } |
| 568 | return reg_types->Conflict(); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | const RegType& RegType::HighHalf(RegTypeCache* cache) const { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 572 | DCHECK(IsLowHalf()); |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 573 | if (IsLongLo()) { |
| 574 | return cache->LongHi(); |
| 575 | } else if (IsDoubleLo()) { |
| 576 | return cache->DoubleHi(); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 577 | } else { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 578 | DCHECK(IsImpreciseConstantLo()); |
| 579 | return cache->FromCat2ConstHi(ConstantValue(), false); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 580 | } |
| 581 | } |
| 582 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 583 | Primitive::Type RegType::GetPrimitiveType() const { |
| 584 | if (IsNonZeroReferenceTypes()) { |
| 585 | return Primitive::kPrimNot; |
| 586 | } else if (IsBooleanTypes()) { |
| 587 | return Primitive::kPrimBoolean; |
| 588 | } else if (IsByteTypes()) { |
| 589 | return Primitive::kPrimByte; |
| 590 | } else if (IsShortTypes()) { |
| 591 | return Primitive::kPrimShort; |
| 592 | } else if (IsCharTypes()) { |
| 593 | return Primitive::kPrimChar; |
| 594 | } else if (IsFloat()) { |
| 595 | return Primitive::kPrimFloat; |
| 596 | } else if (IsIntegralTypes()) { |
| 597 | return Primitive::kPrimInt; |
| 598 | } else if (IsDoubleLo()) { |
| 599 | return Primitive::kPrimDouble; |
| 600 | } else { |
| 601 | DCHECK(IsLongTypes()); |
| 602 | return Primitive::kPrimLong; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | std::set<uint16_t> UnresolvedMergedType::GetMergedTypes() const { |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 607 | std::pair<uint16_t, uint16_t> refs = GetTopMergedTypes(); |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 608 | const RegType& _left(reg_type_cache_->GetFromId(refs.first)); |
| 609 | RegType& __left(const_cast<RegType&>(_left)); |
| 610 | UnresolvedMergedType* left = down_cast<UnresolvedMergedType*>(&__left); |
| 611 | |
| 612 | RegType& _right( |
| 613 | const_cast<RegType&>(reg_type_cache_->GetFromId(refs.second))); |
| 614 | UnresolvedMergedType* right = down_cast<UnresolvedMergedType*>(&_right); |
| 615 | |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 616 | std::set<uint16_t> types; |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 617 | if (left->IsUnresolvedMergedReference()) { |
| 618 | types = left->GetMergedTypes(); |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 619 | } else { |
| 620 | types.insert(refs.first); |
| 621 | } |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 622 | if (right->IsUnresolvedMergedReference()) { |
| 623 | std::set<uint16_t> right_types = right->GetMergedTypes(); |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 624 | types.insert(right_types.begin(), right_types.end()); |
| 625 | } else { |
| 626 | types.insert(refs.second); |
| 627 | } |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 628 | if (kIsDebugBuild) { |
| 629 | typedef std::set<uint16_t>::const_iterator It; // TODO: C++0x auto |
| 630 | for (It it = types.begin(); it != types.end(); ++it) { |
| 631 | CHECK(!reg_type_cache_->GetFromId(*it).IsUnresolvedMergedReference()); |
| 632 | } |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 633 | } |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 634 | return types; |
| 635 | } |
| 636 | |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 637 | const RegType& RegType::GetSuperClass(RegTypeCache* cache) const { |
| 638 | if (!IsUnresolvedTypes()) { |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 639 | mirror::Class* super_klass = GetClass()->GetSuperClass(); |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 640 | if (super_klass != NULL) { |
Sameer Abu Asal | 02c4223 | 2013-04-30 12:09:45 -0700 | [diff] [blame] | 641 | // A super class of a precise type isn't precise as a precise type indicates the register |
| 642 | // holds exactly that type. |
| 643 | return cache->FromClass(super_klass, false); |
Ian Rogers | 0d60484 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 644 | } else { |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 645 | return cache->Zero(); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 646 | } |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 647 | } else { |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 648 | if (!IsUnresolvedMergedReference() && !IsUnresolvedSuperClass() && |
Elliott Hughes | 80537bb | 2013-01-04 16:37:26 -0800 | [diff] [blame] | 649 | GetDescriptor()[0] == '[') { |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 650 | // Super class of all arrays is Object. |
Ian Rogers | b490357 | 2012-10-11 11:52:56 -0700 | [diff] [blame] | 651 | return cache->JavaLangObject(true); |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 652 | } else { |
| 653 | return cache->FromUnresolvedSuperClass(*this); |
| 654 | } |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 655 | } |
| 656 | } |
| 657 | |
| 658 | bool RegType::CanAccess(const RegType& other) const { |
| 659 | if (Equals(other)) { |
| 660 | return true; // Trivial accessibility. |
| 661 | } else { |
| 662 | bool this_unresolved = IsUnresolvedTypes(); |
| 663 | bool other_unresolved = other.IsUnresolvedTypes(); |
| 664 | if (!this_unresolved && !other_unresolved) { |
| 665 | return GetClass()->CanAccess(other.GetClass()); |
| 666 | } else if (!other_unresolved) { |
| 667 | return other.GetClass()->IsPublic(); // Be conservative, only allow if other is public. |
| 668 | } else { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 669 | return false; // More complicated test not possible on unresolved types, be conservative. |
Ian Rogers | e1758fe | 2012-04-19 11:31:15 -0700 | [diff] [blame] | 670 | } |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 671 | } |
| 672 | } |
| 673 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 674 | bool RegType::CanAccessMember(mirror::Class* klass, uint32_t access_flags) const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 675 | if ((access_flags & kAccPublic) != 0) { |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 676 | return true; |
| 677 | } |
| 678 | if (!IsUnresolvedTypes()) { |
| 679 | return GetClass()->CanAccessMember(klass, access_flags); |
| 680 | } else { |
| 681 | return false; // More complicated test not possible on unresolved types, be conservative. |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 682 | } |
| 683 | } |
| 684 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 685 | bool RegType::IsObjectArrayTypes() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 686 | if (IsUnresolvedTypes() && !IsUnresolvedMergedReference() && !IsUnresolvedSuperClass()) { |
| 687 | // Primitive arrays will always resolve |
| 688 | DCHECK(descriptor_[1] == 'L' || descriptor_[1] == '['); |
| 689 | return descriptor_[0] == '['; |
| 690 | } else if (HasClass()) { |
| 691 | mirror::Class* type = GetClass(); |
| 692 | return type->IsArrayClass() && !type->GetComponentType()->IsPrimitive(); |
| 693 | } else { |
| 694 | return false; |
| 695 | } |
| 696 | } |
| 697 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 698 | bool RegType::IsJavaLangObject() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 699 | return IsReference() && GetClass()->IsObjectClass(); |
| 700 | } |
| 701 | |
| 702 | bool RegType::IsArrayTypes() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 703 | if (IsUnresolvedTypes() && !IsUnresolvedMergedReference() && !IsUnresolvedSuperClass()) { |
| 704 | return descriptor_[0] == '['; |
| 705 | } else if (HasClass()) { |
| 706 | return GetClass()->IsArrayClass(); |
| 707 | } else { |
| 708 | return false; |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | bool RegType::IsJavaLangObjectArray() const { |
| 713 | if (HasClass()) { |
| 714 | mirror::Class* type = GetClass(); |
| 715 | return type->IsArrayClass() && type->GetComponentType()->IsObjectClass(); |
| 716 | } |
| 717 | return false; |
| 718 | } |
| 719 | |
| 720 | bool RegType::IsInstantiableTypes() const { |
| 721 | return IsUnresolvedTypes() || (IsNonZeroReferenceTypes() && GetClass()->IsInstantiable()); |
| 722 | } |
| 723 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 724 | ImpreciseConstType::ImpreciseConstType(uint32_t constat, uint16_t cache_id) |
| 725 | : ConstantType(constat, cache_id) { |
| 726 | } |
| 727 | |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 728 | bool RegType::IsAssignableFrom(const RegType& src) const { |
| 729 | if (Equals(src)) { |
| 730 | return true; |
| 731 | } else { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 732 | if (IsBoolean()) { |
| 733 | return src.IsBooleanTypes(); |
| 734 | } else if (IsByte()) { |
| 735 | return src.IsByteTypes(); |
| 736 | } else if (IsShort()) { |
| 737 | return src.IsShortTypes(); |
| 738 | } else if (IsChar()) { |
| 739 | return src.IsCharTypes(); |
| 740 | } else if (IsInteger()) { |
| 741 | return src.IsIntegralTypes(); |
| 742 | } else if (IsFloat()) { |
| 743 | return src.IsFloatTypes(); |
| 744 | } else if (IsLongLo()) { |
| 745 | return src.IsLongTypes(); |
| 746 | } else if (IsDoubleLo()) { |
| 747 | return src.IsDoubleTypes(); |
| 748 | } else { |
| 749 | if (!IsReferenceTypes()) { |
| 750 | LOG(FATAL) << "Unexpected register type in 4bleFrom: '" << src << "'"; |
| 751 | } |
| 752 | if (src.IsZero()) { |
| 753 | return true; // all reference types can be assigned null |
| 754 | } else if (!src.IsReferenceTypes()) { |
| 755 | return false; // expect src to be a reference type |
| 756 | } else if (IsJavaLangObject()) { |
| 757 | return true; // all reference types can be assigned to Object |
| 758 | } else if (!IsUnresolvedTypes() && GetClass()->IsInterface()) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 759 | return true; // We allow assignment to any interface, see comment in ClassJoin |
| 760 | } else if (IsJavaLangObjectArray()) { |
| 761 | return src.IsObjectArrayTypes(); // All reference arrays may be assigned to Object[] |
| 762 | } else if (!IsUnresolvedTypes() && !src.IsUnresolvedTypes() && |
| 763 | GetClass()->IsAssignableFrom(src.GetClass())) { |
| 764 | // We're assignable from the Class point-of-view |
| 765 | return true; |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 766 | } else if (IsUnresolvedTypes()) { |
| 767 | // Unresolved types are only assignable for null, Object and equality. |
| 768 | return (src.IsZero() || src.IsJavaLangObject()); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 769 | } else { |
| 770 | return false; |
| 771 | } |
| 772 | } |
| 773 | } |
| 774 | } |
| 775 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 776 | int32_t ConstantType::ConstantValue() const { |
| 777 | DCHECK(IsConstantTypes()); |
| 778 | return constant_; |
| 779 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 780 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 781 | int32_t ConstantType::ConstantValueLo() const { |
| 782 | DCHECK(IsConstantLo()); |
| 783 | return constant_; |
| 784 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 785 | |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 786 | int32_t ConstantType::ConstantValueHi() const { |
| 787 | if (IsConstantHi() || IsPreciseConstantHi() || IsImpreciseConstantHi()) { |
| 788 | return constant_; |
| 789 | } else { |
| 790 | DCHECK(false); |
| 791 | return 0; |
| 792 | } |
| 793 | } |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 794 | |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 795 | static const RegType& SelectNonConstant(const RegType& a, const RegType& b) { |
| 796 | return a.IsConstant() ? b : a; |
| 797 | } |
| 798 | |
| 799 | const RegType& RegType::Merge(const RegType& incoming_type, RegTypeCache* reg_types) const { |
| 800 | DCHECK(!Equals(incoming_type)); // Trivial equality handled by caller |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 801 | if (IsConflict()) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 802 | return *this; // Conflict MERGE * => Conflict |
| 803 | } else if (incoming_type.IsConflict()) { |
| 804 | return incoming_type; // * MERGE Conflict => Conflict |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 805 | } else if (IsUndefined() || incoming_type.IsUndefined()) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 806 | return reg_types->Conflict(); // Unknown MERGE * => Conflict |
| 807 | } else if (IsConstant() && incoming_type.IsConstant()) { |
| 808 | int32_t val1 = ConstantValue(); |
| 809 | int32_t val2 = incoming_type.ConstantValue(); |
| 810 | if (val1 >= 0 && val2 >= 0) { |
| 811 | // +ve1 MERGE +ve2 => MAX(+ve1, +ve2) |
| 812 | if (val1 >= val2) { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 813 | if (!IsPreciseConstant()) { |
| 814 | return *this; |
| 815 | } else { |
| 816 | return reg_types->FromCat1Const(val1, false); |
| 817 | } |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 818 | } else { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 819 | if (!incoming_type.IsPreciseConstant()) { |
| 820 | return incoming_type; |
| 821 | } else { |
| 822 | return reg_types->FromCat1Const(val2, false); |
| 823 | } |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 824 | } |
| 825 | } else if (val1 < 0 && val2 < 0) { |
| 826 | // -ve1 MERGE -ve2 => MIN(-ve1, -ve2) |
| 827 | if (val1 <= val2) { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 828 | if (!IsPreciseConstant()) { |
| 829 | return *this; |
| 830 | } else { |
| 831 | return reg_types->FromCat1Const(val1, false); |
| 832 | } |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 833 | } else { |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 834 | if (!incoming_type.IsPreciseConstant()) { |
| 835 | return incoming_type; |
| 836 | } else { |
| 837 | return reg_types->FromCat1Const(val2, false); |
| 838 | } |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 839 | } |
| 840 | } else { |
| 841 | // Values are +ve and -ve, choose smallest signed type in which they both fit |
| 842 | if (IsConstantByte()) { |
| 843 | if (incoming_type.IsConstantByte()) { |
| 844 | return reg_types->ByteConstant(); |
| 845 | } else if (incoming_type.IsConstantShort()) { |
| 846 | return reg_types->ShortConstant(); |
| 847 | } else { |
| 848 | return reg_types->IntConstant(); |
| 849 | } |
| 850 | } else if (IsConstantShort()) { |
| 851 | if (incoming_type.IsConstantShort()) { |
| 852 | return reg_types->ShortConstant(); |
| 853 | } else { |
| 854 | return reg_types->IntConstant(); |
| 855 | } |
| 856 | } else { |
| 857 | return reg_types->IntConstant(); |
| 858 | } |
| 859 | } |
Ian Rogers | 2bcb4a4 | 2012-11-08 10:39:18 -0800 | [diff] [blame] | 860 | } else if (IsConstantLo() && incoming_type.IsConstantLo()) { |
| 861 | int32_t val1 = ConstantValueLo(); |
| 862 | int32_t val2 = incoming_type.ConstantValueLo(); |
| 863 | return reg_types->FromCat2ConstLo(val1 | val2, false); |
| 864 | } else if (IsConstantHi() && incoming_type.IsConstantHi()) { |
| 865 | int32_t val1 = ConstantValueHi(); |
| 866 | int32_t val2 = incoming_type.ConstantValueHi(); |
| 867 | return reg_types->FromCat2ConstHi(val1 | val2, false); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 868 | } else if (IsIntegralTypes() && incoming_type.IsIntegralTypes()) { |
| 869 | if (IsBooleanTypes() && incoming_type.IsBooleanTypes()) { |
| 870 | return reg_types->Boolean(); // boolean MERGE boolean => boolean |
| 871 | } |
| 872 | if (IsByteTypes() && incoming_type.IsByteTypes()) { |
| 873 | return reg_types->Byte(); // byte MERGE byte => byte |
| 874 | } |
| 875 | if (IsShortTypes() && incoming_type.IsShortTypes()) { |
| 876 | return reg_types->Short(); // short MERGE short => short |
| 877 | } |
| 878 | if (IsCharTypes() && incoming_type.IsCharTypes()) { |
| 879 | return reg_types->Char(); // char MERGE char => char |
| 880 | } |
| 881 | return reg_types->Integer(); // int MERGE * => int |
| 882 | } else if ((IsFloatTypes() && incoming_type.IsFloatTypes()) || |
| 883 | (IsLongTypes() && incoming_type.IsLongTypes()) || |
| 884 | (IsLongHighTypes() && incoming_type.IsLongHighTypes()) || |
| 885 | (IsDoubleTypes() && incoming_type.IsDoubleTypes()) || |
| 886 | (IsDoubleHighTypes() && incoming_type.IsDoubleHighTypes())) { |
| 887 | // check constant case was handled prior to entry |
| 888 | DCHECK(!IsConstant() || !incoming_type.IsConstant()); |
| 889 | // float/long/double MERGE float/long/double_constant => float/long/double |
| 890 | return SelectNonConstant(*this, incoming_type); |
| 891 | } else if (IsReferenceTypes() && incoming_type.IsReferenceTypes()) { |
| 892 | if (IsZero() || incoming_type.IsZero()) { |
| 893 | return SelectNonConstant(*this, incoming_type); // 0 MERGE ref => ref |
| 894 | } else if (IsJavaLangObject() || incoming_type.IsJavaLangObject()) { |
Ian Rogers | b490357 | 2012-10-11 11:52:56 -0700 | [diff] [blame] | 895 | return reg_types->JavaLangObject(false); // Object MERGE ref => Object |
Ian Rogers | 529781d | 2012-07-23 17:24:29 -0700 | [diff] [blame] | 896 | } else if (IsUnresolvedTypes() || incoming_type.IsUnresolvedTypes()) { |
| 897 | // We know how to merge an unresolved type with itself, 0 or Object. In this case we |
| 898 | // have two sub-classes and don't know how to merge. Create a new string-based unresolved |
| 899 | // type that reflects our lack of knowledge and that allows the rest of the unresolved |
| 900 | // mechanics to continue. |
| 901 | return reg_types->FromUnresolvedMerge(*this, incoming_type); |
| 902 | } else if (IsUninitializedTypes() || incoming_type.IsUninitializedTypes()) { |
| 903 | // Something that is uninitialized hasn't had its constructor called. Mark any merge |
| 904 | // of this type with something that is initialized as conflicting. The cases of a merge |
| 905 | // with itself, 0 or Object are handled above. |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 906 | return reg_types->Conflict(); |
| 907 | } else { // Two reference types, compute Join |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 908 | mirror::Class* c1 = GetClass(); |
| 909 | mirror::Class* c2 = incoming_type.GetClass(); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 910 | DCHECK(c1 != NULL && !c1->IsPrimitive()); |
| 911 | DCHECK(c2 != NULL && !c2->IsPrimitive()); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 912 | mirror::Class* join_class = ClassJoin(c1, c2); |
Ian Rogers | b490357 | 2012-10-11 11:52:56 -0700 | [diff] [blame] | 913 | if (c1 == join_class && !IsPreciseReference()) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 914 | return *this; |
Ian Rogers | b490357 | 2012-10-11 11:52:56 -0700 | [diff] [blame] | 915 | } else if (c2 == join_class && !incoming_type.IsPreciseReference()) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 916 | return incoming_type; |
| 917 | } else { |
Ian Rogers | b490357 | 2012-10-11 11:52:56 -0700 | [diff] [blame] | 918 | return reg_types->FromClass(join_class, false); |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 919 | } |
| 920 | } |
| 921 | } else { |
| 922 | return reg_types->Conflict(); // Unexpected types => Conflict |
| 923 | } |
| 924 | } |
| 925 | |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 926 | // See comment in reg_type.h |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 927 | mirror::Class* RegType::ClassJoin(mirror::Class* s, mirror::Class* t) { |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 928 | DCHECK(!s->IsPrimitive()) << PrettyClass(s); |
| 929 | DCHECK(!t->IsPrimitive()) << PrettyClass(t); |
| 930 | if (s == t) { |
| 931 | return s; |
| 932 | } else if (s->IsAssignableFrom(t)) { |
| 933 | return s; |
| 934 | } else if (t->IsAssignableFrom(s)) { |
| 935 | return t; |
| 936 | } else if (s->IsArrayClass() && t->IsArrayClass()) { |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 937 | mirror::Class* s_ct = s->GetComponentType(); |
| 938 | mirror::Class* t_ct = t->GetComponentType(); |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 939 | if (s_ct->IsPrimitive() || t_ct->IsPrimitive()) { |
| 940 | // Given the types aren't the same, if either array is of primitive types then the only |
| 941 | // common parent is java.lang.Object |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 942 | mirror::Class* result = s->GetSuperClass(); // short-cut to java.lang.Object |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 943 | DCHECK(result->IsObjectClass()); |
| 944 | return result; |
| 945 | } |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 946 | mirror::Class* common_elem = ClassJoin(s_ct, t_ct); |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 947 | ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 948 | mirror::ClassLoader* class_loader = s->GetClassLoader(); |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 949 | std::string descriptor("["); |
| 950 | descriptor += ClassHelper(common_elem).GetDescriptor(); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 951 | mirror::Class* array_class = class_linker->FindClass(descriptor.c_str(), class_loader); |
Ian Rogers | ad0b3a3 | 2012-04-16 14:50:24 -0700 | [diff] [blame] | 952 | DCHECK(array_class != NULL); |
| 953 | return array_class; |
| 954 | } else { |
| 955 | size_t s_depth = s->Depth(); |
| 956 | size_t t_depth = t->Depth(); |
| 957 | // Get s and t to the same depth in the hierarchy |
| 958 | if (s_depth > t_depth) { |
| 959 | while (s_depth > t_depth) { |
| 960 | s = s->GetSuperClass(); |
| 961 | s_depth--; |
| 962 | } |
| 963 | } else { |
| 964 | while (t_depth > s_depth) { |
| 965 | t = t->GetSuperClass(); |
| 966 | t_depth--; |
| 967 | } |
| 968 | } |
| 969 | // Go up the hierarchy until we get to the common parent |
| 970 | while (s != t) { |
| 971 | s = s->GetSuperClass(); |
| 972 | t = t->GetSuperClass(); |
| 973 | } |
| 974 | return s; |
| 975 | } |
| 976 | } |
| 977 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 978 | void RegType::CheckInvariants() const { |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 979 | if (IsConstant() || IsConstantLo() || IsConstantHi()) { |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 980 | CHECK(descriptor_.empty()) << *this; |
| 981 | CHECK(klass_ == NULL) << *this; |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 982 | } |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 983 | } |
| 984 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 985 | UninitializedType::UninitializedType(mirror::Class* klass, const std::string& descriptor, |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 986 | uint32_t allocation_pc, uint16_t cache_id) |
| 987 | : RegType(klass, descriptor, cache_id), allocation_pc_(allocation_pc) { |
| 988 | } |
| 989 | |
| 990 | void UninitializedType::CheckInvariants() const { |
| 991 | CHECK_EQ(allocation_pc_, 0U) << *this; |
| 992 | } |
| 993 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 994 | void UninitializedThisReferenceType::CheckInvariants() const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 995 | UninitializedType::CheckInvariants(); |
| 996 | } |
| 997 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 998 | UninitializedThisReferenceType::UninitializedThisReferenceType(mirror::Class* klass, |
| 999 | const std::string& descriptor, uint16_t cache_id) : UninitializedType(klass, descriptor, 0, cache_id) { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 1000 | } |
| 1001 | |
Ian Rogers | 1bf8d4d | 2013-05-30 00:18:49 -0700 | [diff] [blame^] | 1002 | void UnresolvedUninitializedThisRefType::CheckInvariants() const { |
Sameer Abu Asal | 51a5fb7 | 2013-02-19 14:25:01 -0800 | [diff] [blame] | 1003 | UninitializedType::CheckInvariants(); |
| 1004 | CHECK(!descriptor_.empty()) << *this; |
| 1005 | CHECK(klass_ == NULL) << *this; |
| 1006 | } |
| 1007 | |
| 1008 | void UnresolvedUninitializedRefType::CheckInvariants() const { |
| 1009 | UninitializedType::CheckInvariants(); |
| 1010 | CHECK(!descriptor_.empty()) << *this; |
| 1011 | CHECK(klass_ == NULL) << *this; |
| 1012 | } |
| 1013 | |
| 1014 | void UnresolvedMergedType::CheckInvariants() const { |
| 1015 | // Unresolved merged types: merged types should be defined. |
| 1016 | CHECK(descriptor_.empty()) << *this; |
| 1017 | CHECK(klass_ == NULL) << *this; |
| 1018 | CHECK_NE(merged_types_.first, 0U) << *this; |
| 1019 | CHECK_NE(merged_types_.second, 0U) << *this; |
| 1020 | } |
| 1021 | |
| 1022 | void UnresolvedReferenceType::CheckInvariants() const { |
| 1023 | CHECK(!descriptor_.empty()) << *this; |
| 1024 | CHECK(klass_ == NULL) << *this; |
| 1025 | } |
| 1026 | |
| 1027 | void UnresolvedSuperClass::CheckInvariants() const { |
| 1028 | // Unresolved merged types: merged types should be defined. |
| 1029 | CHECK(descriptor_.empty()) << *this; |
| 1030 | CHECK(klass_ == NULL) << *this; |
| 1031 | CHECK_NE(unresolved_child_id_, 0U) << *this; |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | std::ostream& operator<<(std::ostream& os, const RegType& rhs) { |
Ian Rogers | 776ac1f | 2012-04-13 23:36:36 -0700 | [diff] [blame] | 1035 | os << rhs.Dump(); |
| 1036 | return os; |
| 1037 | } |
| 1038 | |
Elliott Hughes | a21039c | 2012-06-21 12:09:25 -0700 | [diff] [blame] | 1039 | } // namespace verifier |
| 1040 | } // namespace art |