class_linker.h revision 719d1a33f6569864f529e5a3fff59e7bca97aad0
1/* 2 * Copyright (C) 2011 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#ifndef ART_RUNTIME_CLASS_LINKER_H_ 18#define ART_RUNTIME_CLASS_LINKER_H_ 19 20#include <string> 21#include <utility> 22#include <vector> 23 24#include "base/macros.h" 25#include "base/mutex.h" 26#include "dex_file.h" 27#include "gtest/gtest.h" 28#include "jni.h" 29#include "oat_file.h" 30#include "object_callbacks.h" 31 32namespace art { 33namespace gc { 34namespace space { 35 class ImageSpace; 36} // namespace space 37} // namespace gc 38namespace mirror { 39 class ClassLoader; 40 class DexCache; 41 class DexCacheTest_Open_Test; 42 class IfTable; 43 template<class T> class ObjectArray; 44 class StackTraceElement; 45} // namespace mirror 46 47class InternTable; 48template<class T> class ObjectLock; 49class ScopedObjectAccess; 50template<class T> class SirtRef; 51 52typedef bool (ClassVisitor)(mirror::Class* c, void* arg); 53 54enum VisitRootFlags : uint8_t; 55 56class ClassLinker { 57 public: 58 // Interface method table size. Increasing this value reduces the chance of two interface methods 59 // colliding in the interface method table but increases the size of classes that implement 60 // (non-marker) interfaces. 61 static constexpr size_t kImtSize = 64; 62 63 explicit ClassLinker(InternTable* intern_table); 64 ~ClassLinker(); 65 66 // Initialize class linker by bootstraping from dex files 67 void InitFromCompiler(const std::vector<const DexFile*>& boot_class_path) 68 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 69 70 // Initialize class linker from one or more images. 71 void InitFromImage() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 72 73 bool IsInBootClassPath(const char* descriptor); 74 75 // Finds a class by its descriptor, loading it if necessary. 76 // If class_loader is null, searches boot_class_path_. 77 mirror::Class* FindClass(Thread* self, const char* descriptor, 78 const SirtRef<mirror::ClassLoader>& class_loader) 79 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 80 81 // Finds a class by its descriptor using the "system" class loader, ie by searching the 82 // boot_class_path_. 83 mirror::Class* FindSystemClass(Thread* self, const char* descriptor) 84 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 85 86 // Finds the array class given for the element class. 87 mirror::Class* FindArrayClass(Thread* self, mirror::Class* element_class) 88 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 89 90 // Reutrns true if the class linker is initialized. 91 bool IsInitialized() const; 92 93 // Define a new a class based on a ClassDef from a DexFile 94 mirror::Class* DefineClass(const char* descriptor, 95 const SirtRef<mirror::ClassLoader>& class_loader, 96 const DexFile& dex_file, const DexFile::ClassDef& dex_class_def) 97 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 98 99 // Finds a class by its descriptor, returning NULL if it isn't wasn't loaded 100 // by the given 'class_loader'. 101 mirror::Class* LookupClass(const char* descriptor, const mirror::ClassLoader* class_loader) 102 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 103 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 104 105 // Finds all the classes with the given descriptor, regardless of ClassLoader. 106 void LookupClasses(const char* descriptor, std::vector<mirror::Class*>& classes) 107 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 108 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 109 110 mirror::Class* FindPrimitiveClass(char type) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 111 112 // General class unloading is not supported, this is used to prune 113 // unwanted classes during image writing. 114 bool RemoveClass(const char* descriptor, const mirror::ClassLoader* class_loader) 115 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 116 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 117 118 void DumpAllClasses(int flags) 119 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 120 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 121 122 void DumpForSigQuit(std::ostream& os) 123 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 124 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 125 126 size_t NumLoadedClasses() 127 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 128 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 129 130 // Resolve a String with the given index from the DexFile, storing the 131 // result in the DexCache. The referrer is used to identify the 132 // target DexCache and ClassLoader to use for resolution. 133 mirror::String* ResolveString(uint32_t string_idx, mirror::ArtMethod* referrer) 134 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 135 136 // Resolve a String with the given index from the DexFile, storing the 137 // result in the DexCache. 138 mirror::String* ResolveString(const DexFile& dex_file, uint32_t string_idx, 139 const SirtRef<mirror::DexCache>& dex_cache) 140 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 141 142 // Resolve a Type with the given index from the DexFile, storing the 143 // result in the DexCache. The referrer is used to identity the 144 // target DexCache and ClassLoader to use for resolution. 145 mirror::Class* ResolveType(const DexFile& dex_file, uint16_t type_idx, mirror::Class* referrer) 146 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 147 148 // Resolve a Type with the given index from the DexFile, storing the 149 // result in the DexCache. The referrer is used to identify the 150 // target DexCache and ClassLoader to use for resolution. 151 mirror::Class* ResolveType(uint16_t type_idx, mirror::ArtMethod* referrer) 152 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 153 154 mirror::Class* ResolveType(uint16_t type_idx, mirror::ArtField* referrer) 155 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 156 157 // Resolve a type with the given ID from the DexFile, storing the 158 // result in DexCache. The ClassLoader is used to search for the 159 // type, since it may be referenced from but not contained within 160 // the given DexFile. 161 mirror::Class* ResolveType(const DexFile& dex_file, uint16_t type_idx, 162 const SirtRef<mirror::DexCache>& dex_cache, 163 const SirtRef<mirror::ClassLoader>& class_loader) 164 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 165 166 // Resolve a method with a given ID from the DexFile, storing the 167 // result in DexCache. The ClassLinker and ClassLoader are used as 168 // in ResolveType. What is unique is the method type argument which 169 // is used to determine if this method is a direct, static, or 170 // virtual method. 171 mirror::ArtMethod* ResolveMethod(const DexFile& dex_file, 172 uint32_t method_idx, 173 const SirtRef<mirror::DexCache>& dex_cache, 174 const SirtRef<mirror::ClassLoader>& class_loader, 175 mirror::ArtMethod* referrer, 176 InvokeType type) 177 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 178 179 mirror::ArtMethod* ResolveMethod(uint32_t method_idx, mirror::ArtMethod* referrer, 180 InvokeType type) 181 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 182 183 mirror::ArtField* ResolveField(uint32_t field_idx, mirror::ArtMethod* referrer, 184 bool is_static) 185 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 186 187 // Resolve a field with a given ID from the DexFile, storing the 188 // result in DexCache. The ClassLinker and ClassLoader are used as 189 // in ResolveType. What is unique is the is_static argument which is 190 // used to determine if we are resolving a static or non-static 191 // field. 192 mirror::ArtField* ResolveField(const DexFile& dex_file, 193 uint32_t field_idx, 194 const SirtRef<mirror::DexCache>& dex_cache, 195 const SirtRef<mirror::ClassLoader>& class_loader, 196 bool is_static) 197 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 198 199 // Resolve a field with a given ID from the DexFile, storing the 200 // result in DexCache. The ClassLinker and ClassLoader are used as 201 // in ResolveType. No is_static argument is provided so that Java 202 // field resolution semantics are followed. 203 mirror::ArtField* ResolveFieldJLS(const DexFile& dex_file, 204 uint32_t field_idx, 205 const SirtRef<mirror::DexCache>& dex_cache, 206 const SirtRef<mirror::ClassLoader>& class_loader) 207 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 208 209 // Get shorty from method index without resolution. Used to do handlerization. 210 const char* MethodShorty(uint32_t method_idx, mirror::ArtMethod* referrer, uint32_t* length) 211 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 212 213 // Returns true on success, false if there's an exception pending. 214 // can_run_clinit=false allows the compiler to attempt to init a class, 215 // given the restriction that no <clinit> execution is possible. 216 bool EnsureInitialized(const SirtRef<mirror::Class>& c, 217 bool can_init_fields, bool can_init_parents) 218 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 219 220 // Initializes classes that have instances in the image but that have 221 // <clinit> methods so they could not be initialized by the compiler. 222 void RunRootClinits() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 223 224 void RegisterDexFile(const DexFile& dex_file) 225 LOCKS_EXCLUDED(dex_lock_) 226 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 227 void RegisterDexFile(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache) 228 LOCKS_EXCLUDED(dex_lock_) 229 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 230 231 const OatFile* RegisterOatFile(const OatFile* oat_file) 232 LOCKS_EXCLUDED(dex_lock_); 233 234 const std::vector<const DexFile*>& GetBootClassPath() { 235 return boot_class_path_; 236 } 237 238 void VisitClasses(ClassVisitor* visitor, void* arg) 239 LOCKS_EXCLUDED(dex_lock_) 240 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 241 // Less efficient variant of VisitClasses that doesn't hold the classlinker_classes_lock_ 242 // when calling the visitor. 243 void VisitClassesWithoutClassesLock(ClassVisitor* visitor, void* arg) 244 LOCKS_EXCLUDED(dex_lock_) 245 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 246 247 void VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) 248 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_, dex_lock_); 249 250 mirror::DexCache* FindDexCache(const DexFile& dex_file) const 251 LOCKS_EXCLUDED(dex_lock_) 252 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 253 bool IsDexFileRegistered(const DexFile& dex_file) const 254 LOCKS_EXCLUDED(dex_lock_); 255 void FixupDexCaches(mirror::ArtMethod* resolution_method) const 256 LOCKS_EXCLUDED(dex_lock_) 257 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 258 259 // Generate an oat file from a dex file 260 bool GenerateOatFile(const char* dex_filename, 261 int oat_fd, 262 const char* oat_cache_filename, 263 std::string* error_msg) 264 LOCKS_EXCLUDED(Locks::mutator_lock_); 265 266 const OatFile* FindOatFileFromOatLocation(const std::string& location, 267 std::string* error_msg) 268 LOCKS_EXCLUDED(dex_lock_); 269 270 // Finds the oat file for a dex location, generating the oat file if 271 // it is missing or out of date. Returns the DexFile from within the 272 // created oat file. 273 const DexFile* FindOrCreateOatFileForDexLocation(const char* dex_location, 274 uint32_t dex_location_checksum, 275 const char* oat_location, 276 std::string* error_msg) 277 LOCKS_EXCLUDED(dex_lock_, Locks::mutator_lock_); 278 // Find a DexFile within an OatFile given a DexFile location. Note 279 // that this returns null if the location checksum of the DexFile 280 // does not match the OatFile. 281 const DexFile* FindDexFileInOatFileFromDexLocation(const char* location, 282 const uint32_t* const location_checksum, 283 std::string* error_msg) 284 LOCKS_EXCLUDED(dex_lock_, Locks::mutator_lock_); 285 286 287 // Returns true if oat file contains the dex file with the given location and checksum. 288 static bool VerifyOatFileChecksums(const OatFile* oat_file, 289 const char* dex_location, 290 uint32_t dex_location_checksum, 291 std::string* error_msg); 292 293 // TODO: replace this with multiple methods that allocate the correct managed type. 294 template <class T> 295 mirror::ObjectArray<T>* AllocObjectArray(Thread* self, size_t length) 296 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 297 298 mirror::ObjectArray<mirror::Class>* AllocClassArray(Thread* self, size_t length) 299 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 300 301 mirror::ObjectArray<mirror::String>* AllocStringArray(Thread* self, size_t length) 302 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 303 304 mirror::ObjectArray<mirror::ArtMethod>* AllocArtMethodArray(Thread* self, size_t length) 305 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 306 307 mirror::IfTable* AllocIfTable(Thread* self, size_t ifcount) 308 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 309 310 mirror::ObjectArray<mirror::ArtField>* AllocArtFieldArray(Thread* self, size_t length) 311 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 312 313 mirror::ObjectArray<mirror::StackTraceElement>* AllocStackTraceElementArray(Thread* self, 314 size_t length) 315 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 316 317 void VerifyClass(const SirtRef<mirror::Class>& klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 318 bool VerifyClassUsingOatFile(const DexFile& dex_file, mirror::Class* klass, 319 mirror::Class::Status& oat_file_class_status) 320 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 321 void ResolveClassExceptionHandlerTypes(const DexFile& dex_file, 322 const SirtRef<mirror::Class>& klass) 323 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 324 void ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, mirror::ArtMethod* klass) 325 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 326 327 mirror::Class* CreateProxyClass(ScopedObjectAccess& soa, jstring name, jobjectArray interfaces, 328 jobject loader, jobjectArray methods, jobjectArray throws) 329 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 330 std::string GetDescriptorForProxy(mirror::Class* proxy_class) 331 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 332 mirror::ArtMethod* FindMethodForProxy(mirror::Class* proxy_class, 333 mirror::ArtMethod* proxy_method) 334 LOCKS_EXCLUDED(dex_lock_) 335 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 336 337 // Get the oat code for a method when its class isn't yet initialized 338 const void* GetQuickOatCodeFor(mirror::ArtMethod* method) 339 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 340 const void* GetPortableOatCodeFor(mirror::ArtMethod* method, bool* have_portable_code) 341 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 342 343 // Get the oat code for a method from a method index. 344 const void* GetQuickOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, uint32_t method_idx) 345 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 346 const void* GetPortableOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, uint32_t method_idx) 347 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 348 349 pid_t GetClassesLockOwner(); // For SignalCatcher. 350 pid_t GetDexLockOwner(); // For SignalCatcher. 351 352 const void* GetPortableResolutionTrampoline() const { 353 return portable_resolution_trampoline_; 354 } 355 356 const void* GetQuickGenericJniTrampoline() const { 357 return quick_generic_jni_trampoline_; 358 } 359 360 const void* GetQuickResolutionTrampoline() const { 361 return quick_resolution_trampoline_; 362 } 363 364 const void* GetPortableImtConflictTrampoline() const { 365 return portable_imt_conflict_trampoline_; 366 } 367 368 const void* GetQuickImtConflictTrampoline() const { 369 return quick_imt_conflict_trampoline_; 370 } 371 372 InternTable* GetInternTable() const { 373 return intern_table_; 374 } 375 376 // Attempts to insert a class into a class table. Returns NULL if 377 // the class was inserted, otherwise returns an existing class with 378 // the same descriptor and ClassLoader. 379 mirror::Class* InsertClass(const char* descriptor, mirror::Class* klass, size_t hash) 380 LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 381 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 382 383 // Special code to allocate an art method, use this instead of class->AllocObject. 384 mirror::ArtMethod* AllocArtMethod(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 385 386 private: 387 const OatFile::OatMethod GetOatMethodFor(mirror::ArtMethod* method) 388 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 389 390 OatFile& GetImageOatFile(gc::space::ImageSpace* space) 391 LOCKS_EXCLUDED(dex_lock_) 392 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 393 394 void FinishInit(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 395 396 // For early bootstrapping by Init 397 mirror::Class* AllocClass(Thread* self, mirror::Class* java_lang_Class, uint32_t class_size) 398 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 399 400 // Alloc* convenience functions to avoid needing to pass in mirror::Class* 401 // values that are known to the ClassLinker such as 402 // kObjectArrayClass and kJavaLangString etc. 403 mirror::Class* AllocClass(Thread* self, uint32_t class_size) 404 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 405 mirror::DexCache* AllocDexCache(Thread* self, const DexFile& dex_file) 406 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 407 mirror::ArtField* AllocArtField(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 408 409 mirror::Class* CreatePrimitiveClass(Thread* self, Primitive::Type type) 410 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 411 mirror::Class* InitializePrimitiveClass(mirror::Class* primitive_class, Primitive::Type type) 412 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 413 414 415 mirror::Class* CreateArrayClass(Thread* self, const char* descriptor, 416 const SirtRef<mirror::ClassLoader>& class_loader) 417 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 418 419 void AppendToBootClassPath(const DexFile& dex_file) 420 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 421 void AppendToBootClassPath(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache) 422 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 423 424 void ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def, 425 mirror::Class* c, SafeMap<uint32_t, mirror::ArtField*>& field_map) 426 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 427 428 uint32_t SizeOfClass(const DexFile& dex_file, 429 const DexFile::ClassDef& dex_class_def); 430 431 void LoadClass(const DexFile& dex_file, 432 const DexFile::ClassDef& dex_class_def, 433 const SirtRef<mirror::Class>& klass, 434 mirror::ClassLoader* class_loader) 435 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 436 437 void LoadField(const DexFile& dex_file, const ClassDataItemIterator& it, 438 const SirtRef<mirror::Class>& klass, const SirtRef<mirror::ArtField>& dst) 439 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 440 441 mirror::ArtMethod* LoadMethod(Thread* self, const DexFile& dex_file, 442 const ClassDataItemIterator& dex_method, 443 const SirtRef<mirror::Class>& klass) 444 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 445 446 void FixupStaticTrampolines(mirror::Class* klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 447 448 // Finds the associated oat class for a dex_file and descriptor 449 const OatFile::OatClass* GetOatClass(const DexFile& dex_file, uint16_t class_def_idx) 450 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 451 452 void RegisterDexFileLocked(const DexFile& dex_file, const SirtRef<mirror::DexCache>& dex_cache) 453 EXCLUSIVE_LOCKS_REQUIRED(dex_lock_) 454 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 455 bool IsDexFileRegisteredLocked(const DexFile& dex_file) const SHARED_LOCKS_REQUIRED(dex_lock_); 456 457 bool InitializeClass(const SirtRef<mirror::Class>& klass, bool can_run_clinit, 458 bool can_init_parents) 459 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 460 bool WaitForInitializeClass(const SirtRef<mirror::Class>& klass, Thread* self, 461 ObjectLock<mirror::Class>& lock); 462 bool ValidateSuperClassDescriptors(const SirtRef<mirror::Class>& klass) 463 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 464 465 bool IsSameDescriptorInDifferentClassContexts(Thread* self, const char* descriptor, 466 SirtRef<mirror::ClassLoader>& class_loader1, 467 SirtRef<mirror::ClassLoader>& class_loader2) 468 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 469 470 bool IsSameMethodSignatureInDifferentClassContexts(Thread* self, mirror::ArtMethod* method, 471 mirror::Class* klass1, 472 mirror::Class* klass2) 473 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 474 475 bool LinkClass(Thread* self, const SirtRef<mirror::Class>& klass, 476 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) 477 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 478 479 bool LinkSuperClass(const SirtRef<mirror::Class>& klass) 480 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 481 482 bool LoadSuperAndInterfaces(const SirtRef<mirror::Class>& klass, const DexFile& dex_file) 483 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 484 485 bool LinkMethods(const SirtRef<mirror::Class>& klass, 486 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) 487 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 488 489 bool LinkVirtualMethods(const SirtRef<mirror::Class>& klass) 490 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 491 492 bool LinkInterfaceMethods(const SirtRef<mirror::Class>& klass, 493 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) 494 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 495 496 bool LinkStaticFields(const SirtRef<mirror::Class>& klass) 497 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 498 bool LinkInstanceFields(const SirtRef<mirror::Class>& klass) 499 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 500 bool LinkFields(const SirtRef<mirror::Class>& klass, bool is_static) 501 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 502 503 504 void CreateReferenceInstanceOffsets(const SirtRef<mirror::Class>& klass) 505 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 506 void CreateReferenceStaticOffsets(const SirtRef<mirror::Class>& klass) 507 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 508 void CreateReferenceOffsets(const SirtRef<mirror::Class>& klass, bool is_static, 509 uint32_t reference_offsets) 510 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 511 512 // For use by ImageWriter to find DexCaches for its roots 513 const std::vector<mirror::DexCache*>& GetDexCaches() { 514 return dex_caches_; 515 } 516 517 const OatFile* FindOpenedOatFileForDexFile(const DexFile& dex_file) 518 LOCKS_EXCLUDED(dex_lock_) 519 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 520 const OatFile* FindOpenedOatFileFromDexLocation(const char* dex_location, 521 const uint32_t* const dex_location_checksum) 522 LOCKS_EXCLUDED(dex_lock_); 523 const OatFile* FindOpenedOatFileFromOatLocation(const std::string& oat_location) 524 LOCKS_EXCLUDED(dex_lock_); 525 const DexFile* FindDexFileInOatLocation(const char* dex_location, 526 uint32_t dex_location_checksum, 527 const char* oat_location, 528 std::string* error_msg) 529 LOCKS_EXCLUDED(dex_lock_); 530 531 const DexFile* VerifyAndOpenDexFileFromOatFile(const std::string& oat_file_location, 532 const char* dex_location, 533 std::string* error_msg, 534 bool* open_failed) 535 LOCKS_EXCLUDED(dex_lock_); 536 537 mirror::ArtMethod* CreateProxyConstructor(Thread* self, const SirtRef<mirror::Class>& klass, 538 mirror::Class* proxy_class) 539 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 540 mirror::ArtMethod* CreateProxyMethod(Thread* self, const SirtRef<mirror::Class>& klass, 541 const SirtRef<mirror::ArtMethod>& prototype) 542 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 543 544 std::vector<const DexFile*> boot_class_path_; 545 546 mutable ReaderWriterMutex dex_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 547 std::vector<size_t> new_dex_cache_roots_ GUARDED_BY(dex_lock_);; 548 std::vector<mirror::DexCache*> dex_caches_ GUARDED_BY(dex_lock_); 549 std::vector<const OatFile*> oat_files_ GUARDED_BY(dex_lock_); 550 551 552 // multimap from a string hash code of a class descriptor to 553 // mirror::Class* instances. Results should be compared for a matching 554 // Class::descriptor_ and Class::class_loader_. 555 typedef std::multimap<size_t, mirror::Class*> Table; 556 Table class_table_ GUARDED_BY(Locks::classlinker_classes_lock_); 557 std::vector<std::pair<size_t, mirror::Class*> > new_class_roots_; 558 559 // Do we need to search dex caches to find image classes? 560 bool dex_cache_image_class_lookup_required_; 561 // Number of times we've searched dex caches for a class. After a certain number of misses we move 562 // the classes into the class_table_ to avoid dex cache based searches. 563 AtomicInteger failed_dex_cache_class_lookups_; 564 565 mirror::Class* LookupClassFromTableLocked(const char* descriptor, 566 const mirror::ClassLoader* class_loader, 567 size_t hash) 568 SHARED_LOCKS_REQUIRED(Locks::classlinker_classes_lock_, Locks::mutator_lock_); 569 570 void MoveImageClassesToClassTable() LOCKS_EXCLUDED(Locks::classlinker_classes_lock_) 571 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 572 mirror::Class* LookupClassFromImage(const char* descriptor) 573 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 574 575 // indexes into class_roots_. 576 // needs to be kept in sync with class_roots_descriptors_. 577 enum ClassRoot { 578 kJavaLangClass, 579 kJavaLangObject, 580 kClassArrayClass, 581 kObjectArrayClass, 582 kJavaLangString, 583 kJavaLangDexCache, 584 kJavaLangRefReference, 585 kJavaLangReflectArtField, 586 kJavaLangReflectArtMethod, 587 kJavaLangReflectProxy, 588 kJavaLangStringArrayClass, 589 kJavaLangReflectArtFieldArrayClass, 590 kJavaLangReflectArtMethodArrayClass, 591 kJavaLangClassLoader, 592 kJavaLangThrowable, 593 kJavaLangClassNotFoundException, 594 kJavaLangStackTraceElement, 595 kPrimitiveBoolean, 596 kPrimitiveByte, 597 kPrimitiveChar, 598 kPrimitiveDouble, 599 kPrimitiveFloat, 600 kPrimitiveInt, 601 kPrimitiveLong, 602 kPrimitiveShort, 603 kPrimitiveVoid, 604 kBooleanArrayClass, 605 kByteArrayClass, 606 kCharArrayClass, 607 kDoubleArrayClass, 608 kFloatArrayClass, 609 kIntArrayClass, 610 kLongArrayClass, 611 kShortArrayClass, 612 kJavaLangStackTraceElementArrayClass, 613 kClassRootsMax, 614 }; 615 mirror::ObjectArray<mirror::Class>* class_roots_; 616 617 mirror::Class* GetClassRoot(ClassRoot class_root) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 618 619 void SetClassRoot(ClassRoot class_root, mirror::Class* klass) 620 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 621 622 mirror::ObjectArray<mirror::Class>* GetClassRoots() { 623 DCHECK(class_roots_ != NULL); 624 return class_roots_; 625 } 626 627 static const char* class_roots_descriptors_[]; 628 629 const char* GetClassRootDescriptor(ClassRoot class_root) { 630 const char* descriptor = class_roots_descriptors_[class_root]; 631 CHECK(descriptor != NULL); 632 return descriptor; 633 } 634 635 // The interface table used by all arrays. 636 mirror::IfTable* array_iftable_; 637 638 // A cache of the last FindArrayClass results. The cache serves to avoid creating array class 639 // descriptors for the sake of performing FindClass. 640 static constexpr size_t kFindArrayCacheSize = 16; 641 mirror::Class* find_array_class_cache_[kFindArrayCacheSize]; 642 size_t find_array_class_cache_next_victim_; 643 644 bool init_done_; 645 bool log_new_dex_caches_roots_ GUARDED_BY(dex_lock_); 646 bool log_new_class_table_roots_ GUARDED_BY(Locks::classlinker_classes_lock_); 647 648 InternTable* intern_table_; 649 650 const void* portable_resolution_trampoline_; 651 const void* quick_resolution_trampoline_; 652 const void* portable_imt_conflict_trampoline_; 653 const void* quick_imt_conflict_trampoline_; 654 const void* quick_generic_jni_trampoline_; 655 656 friend class ImageWriter; // for GetClassRoots 657 FRIEND_TEST(ClassLinkerTest, ClassRootDescriptors); 658 FRIEND_TEST(mirror::DexCacheTest, Open); 659 FRIEND_TEST(ExceptionTest, FindExceptionHandler); 660 FRIEND_TEST(ObjectTest, AllocObjectArray); 661 DISALLOW_COPY_AND_ASSIGN(ClassLinker); 662}; 663 664} // namespace art 665 666#endif // ART_RUNTIME_CLASS_LINKER_H_ 667