compiler_driver.h revision 6bb7f1b60f4b6b2214457d19d66d2b7b50685feb
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_COMPILER_DRIVER_COMPILER_DRIVER_H_ 18#define ART_COMPILER_DRIVER_COMPILER_DRIVER_H_ 19 20#include <set> 21#include <string> 22#include <unordered_set> 23#include <vector> 24 25#include "arch/instruction_set.h" 26#include "base/arena_allocator.h" 27#include "base/array_ref.h" 28#include "base/bit_utils.h" 29#include "base/mutex.h" 30#include "base/timing_logger.h" 31#include "class_reference.h" 32#include "compiler.h" 33#include "dex_file.h" 34#include "driver/compiled_method_storage.h" 35#include "jit/offline_profiling_info.h" 36#include "invoke_type.h" 37#include "method_reference.h" 38#include "mirror/class.h" // For mirror::Class::Status. 39#include "os.h" 40#include "runtime.h" 41#include "safe_map.h" 42#include "thread_pool.h" 43#include "utils/dex_cache_arrays_layout.h" 44 45namespace art { 46 47namespace mirror { 48class DexCache; 49} // namespace mirror 50 51namespace verifier { 52class MethodVerifier; 53class VerifierDeps; 54class VerifierDepsTest; 55} // namespace verifier 56 57class BitVector; 58class CompiledClass; 59class CompiledMethod; 60class CompilerOptions; 61class DexCompilationUnit; 62struct InlineIGetIPutData; 63class InstructionSetFeatures; 64class ParallelCompilationManager; 65class ScopedObjectAccess; 66template <class Allocator> class SrcMap; 67class SrcMapElem; 68using SwapSrcMap = SrcMap<SwapAllocator<SrcMapElem>>; 69template<class T> class Handle; 70class TimingLogger; 71class VerificationResults; 72class VerifiedMethod; 73 74enum EntryPointCallingConvention { 75 // ABI of invocations to a method's interpreter entry point. 76 kInterpreterAbi, 77 // ABI of calls to a method's native code, only used for native methods. 78 kJniAbi, 79 // ABI of calls to a method's quick code entry point. 80 kQuickAbi 81}; 82 83class CompilerDriver { 84 public: 85 // Create a compiler targeting the requested "instruction_set". 86 // "image" should be true if image specific optimizations should be 87 // enabled. "image_classes" lets the compiler know what classes it 88 // can assume will be in the image, with null implying all available 89 // classes. 90 CompilerDriver(const CompilerOptions* compiler_options, 91 VerificationResults* verification_results, 92 Compiler::Kind compiler_kind, 93 InstructionSet instruction_set, 94 const InstructionSetFeatures* instruction_set_features, 95 std::unordered_set<std::string>* image_classes, 96 std::unordered_set<std::string>* compiled_classes, 97 std::unordered_set<std::string>* compiled_methods, 98 size_t thread_count, 99 bool dump_stats, 100 bool dump_passes, 101 CumulativeLogger* timer, 102 int swap_fd, 103 const ProfileCompilationInfo* profile_compilation_info); 104 105 ~CompilerDriver(); 106 107 // Set dex files that will be stored in the oat file after being compiled. 108 void SetDexFilesForOatFile(const std::vector<const DexFile*>& dex_files) { 109 dex_files_for_oat_file_ = &dex_files; 110 } 111 112 // Get dex file that will be stored in the oat file after being compiled. 113 ArrayRef<const DexFile* const> GetDexFilesForOatFile() const { 114 return (dex_files_for_oat_file_ != nullptr) 115 ? ArrayRef<const DexFile* const>(*dex_files_for_oat_file_) 116 : ArrayRef<const DexFile* const>(); 117 } 118 119 void CompileAll(jobject class_loader, 120 const std::vector<const DexFile*>& dex_files, 121 verifier::VerifierDeps* verifier_deps, 122 TimingLogger* timings) 123 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_, !dex_to_dex_references_lock_); 124 125 // Compile a single Method. 126 void CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) 127 REQUIRES_SHARED(Locks::mutator_lock_) 128 REQUIRES(!compiled_methods_lock_, !compiled_classes_lock_, !dex_to_dex_references_lock_); 129 130 VerificationResults* GetVerificationResults() const { 131 DCHECK(Runtime::Current()->IsAotCompiler()); 132 return verification_results_; 133 } 134 135 InstructionSet GetInstructionSet() const { 136 return instruction_set_; 137 } 138 139 const InstructionSetFeatures* GetInstructionSetFeatures() const { 140 return instruction_set_features_; 141 } 142 143 const CompilerOptions& GetCompilerOptions() const { 144 return *compiler_options_; 145 } 146 147 Compiler* GetCompiler() const { 148 return compiler_.get(); 149 } 150 151 const std::unordered_set<std::string>* GetImageClasses() const { 152 return image_classes_.get(); 153 } 154 155 // Generate the trampolines that are invoked by unresolved direct methods. 156 std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookup() const; 157 std::unique_ptr<const std::vector<uint8_t>> CreateQuickGenericJniTrampoline() const; 158 std::unique_ptr<const std::vector<uint8_t>> CreateQuickImtConflictTrampoline() const; 159 std::unique_ptr<const std::vector<uint8_t>> CreateQuickResolutionTrampoline() const; 160 std::unique_ptr<const std::vector<uint8_t>> CreateQuickToInterpreterBridge() const; 161 162 CompiledClass* GetCompiledClass(ClassReference ref) const 163 REQUIRES(!compiled_classes_lock_); 164 165 CompiledMethod* GetCompiledMethod(MethodReference ref) const 166 REQUIRES(!compiled_methods_lock_); 167 size_t GetNonRelativeLinkerPatchCount() const 168 REQUIRES(!compiled_methods_lock_); 169 170 // Add a compiled method. 171 void AddCompiledMethod(const MethodReference& method_ref, 172 CompiledMethod* const compiled_method, 173 size_t non_relative_linker_patch_count) 174 REQUIRES(!compiled_methods_lock_); 175 // Remove and delete a compiled method. 176 void RemoveCompiledMethod(const MethodReference& method_ref) REQUIRES(!compiled_methods_lock_); 177 178 void SetRequiresConstructorBarrier(Thread* self, 179 const DexFile* dex_file, 180 uint16_t class_def_index, 181 bool requires) 182 REQUIRES(!requires_constructor_barrier_lock_); 183 bool RequiresConstructorBarrier(Thread* self, 184 const DexFile* dex_file, 185 uint16_t class_def_index) 186 REQUIRES(!requires_constructor_barrier_lock_); 187 188 // Are runtime access checks necessary in the compiled code? 189 bool CanAccessTypeWithoutChecks(uint32_t referrer_idx, 190 Handle<mirror::DexCache> dex_cache, 191 uint32_t type_idx) 192 REQUIRES_SHARED(Locks::mutator_lock_); 193 194 // Are runtime access and instantiable checks necessary in the code? 195 // out_is_finalizable is set to whether the type is finalizable. 196 bool CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 197 Handle<mirror::DexCache> dex_cache, 198 uint32_t type_idx, 199 bool* out_is_finalizable) 200 REQUIRES_SHARED(Locks::mutator_lock_); 201 202 // Resolve compiling method's class. Returns null on failure. 203 mirror::Class* ResolveCompilingMethodsClass( 204 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 205 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit) 206 REQUIRES_SHARED(Locks::mutator_lock_); 207 208 mirror::Class* ResolveClass( 209 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 210 Handle<mirror::ClassLoader> class_loader, uint16_t type_index, 211 const DexCompilationUnit* mUnit) 212 REQUIRES_SHARED(Locks::mutator_lock_); 213 214 // Resolve a field. Returns null on failure, including incompatible class change. 215 // NOTE: Unlike ClassLinker's ResolveField(), this method enforces is_static. 216 ArtField* ResolveField( 217 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 218 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, 219 uint32_t field_idx, bool is_static) 220 REQUIRES_SHARED(Locks::mutator_lock_); 221 222 // Resolve a field with a given dex file. 223 ArtField* ResolveFieldWithDexFile( 224 const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 225 Handle<mirror::ClassLoader> class_loader, const DexFile* dex_file, 226 uint32_t field_idx, bool is_static) 227 REQUIRES_SHARED(Locks::mutator_lock_); 228 229 // Can we fast-path an IGET/IPUT access to an instance field? If yes, compute the field offset. 230 std::pair<bool, bool> IsFastInstanceField( 231 mirror::DexCache* dex_cache, mirror::Class* referrer_class, 232 ArtField* resolved_field, uint16_t field_idx) 233 REQUIRES_SHARED(Locks::mutator_lock_); 234 235 // Can we fast-path an SGET/SPUT access to a static field? If yes, compute the type index 236 // of the declaring class in the referrer's dex file. 237 std::pair<bool, bool> IsFastStaticField( 238 mirror::DexCache* dex_cache, mirror::Class* referrer_class, 239 ArtField* resolved_field, uint16_t field_idx, uint32_t* storage_index) 240 REQUIRES_SHARED(Locks::mutator_lock_); 241 242 // Return whether the declaring class of `resolved_method` is 243 // available to `referrer_class`. If this is true, compute the type 244 // index of the declaring class in the referrer's dex file and 245 // return it through the out argument `storage_index`; otherwise 246 // return DexFile::kDexNoIndex through `storage_index`. 247 bool IsClassOfStaticMethodAvailableToReferrer(mirror::DexCache* dex_cache, 248 mirror::Class* referrer_class, 249 ArtMethod* resolved_method, 250 uint16_t method_idx, 251 uint32_t* storage_index) 252 REQUIRES_SHARED(Locks::mutator_lock_); 253 254 // Resolve a method. Returns null on failure, including incompatible class change. 255 ArtMethod* ResolveMethod( 256 ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, 257 Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, 258 uint32_t method_idx, InvokeType invoke_type, bool check_incompatible_class_change = true) 259 REQUIRES_SHARED(Locks::mutator_lock_); 260 261 void ProcessedInstanceField(bool resolved); 262 void ProcessedStaticField(bool resolved, bool local); 263 264 // Can we fast path instance field access? Computes field's offset and volatility. 265 bool ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, bool is_put, 266 MemberOffset* field_offset, bool* is_volatile) 267 REQUIRES(!Locks::mutator_lock_); 268 269 ArtField* ComputeInstanceFieldInfo(uint32_t field_idx, 270 const DexCompilationUnit* mUnit, 271 bool is_put, 272 const ScopedObjectAccess& soa) 273 REQUIRES_SHARED(Locks::mutator_lock_); 274 275 276 const VerifiedMethod* GetVerifiedMethod(const DexFile* dex_file, uint32_t method_idx) const; 277 bool IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc); 278 279 bool GetSupportBootImageFixup() const { 280 return support_boot_image_fixup_; 281 } 282 283 void SetSupportBootImageFixup(bool support_boot_image_fixup) { 284 support_boot_image_fixup_ = support_boot_image_fixup; 285 } 286 287 void SetCompilerContext(void* compiler_context) { 288 compiler_context_ = compiler_context; 289 } 290 291 void* GetCompilerContext() const { 292 return compiler_context_; 293 } 294 295 size_t GetThreadCount() const { 296 return parallel_thread_count_; 297 } 298 299 bool GetDumpStats() const { 300 return dump_stats_; 301 } 302 303 bool GetDumpPasses() const { 304 return dump_passes_; 305 } 306 307 CumulativeLogger* GetTimingsLogger() const { 308 return timings_logger_; 309 } 310 311 void SetDedupeEnabled(bool dedupe_enabled) { 312 compiled_method_storage_.SetDedupeEnabled(dedupe_enabled); 313 } 314 315 bool DedupeEnabled() const { 316 return compiled_method_storage_.DedupeEnabled(); 317 } 318 319 // Checks if class specified by type_idx is one of the image_classes_ 320 bool IsImageClass(const char* descriptor) const; 321 322 // Checks whether the provided class should be compiled, i.e., is in classes_to_compile_. 323 bool IsClassToCompile(const char* descriptor) const; 324 325 // Checks whether the provided method should be compiled, i.e., is in method_to_compile_. 326 bool IsMethodToCompile(const MethodReference& method_ref) const; 327 328 // Checks whether profile guided compilation is enabled and if the method should be compiled 329 // according to the profile file. 330 bool ShouldCompileBasedOnProfile(const MethodReference& method_ref) const; 331 332 // Checks whether profile guided verification is enabled and if the method should be verified 333 // according to the profile file. 334 bool ShouldVerifyClassBasedOnProfile(const DexFile& dex_file, uint16_t class_idx) const; 335 336 void RecordClassStatus(ClassReference ref, mirror::Class::Status status) 337 REQUIRES(!compiled_classes_lock_); 338 339 // Checks if the specified method has been verified without failures. Returns 340 // false if the method is not in the verification results (GetVerificationResults). 341 bool IsMethodVerifiedWithoutFailures(uint32_t method_idx, 342 uint16_t class_def_idx, 343 const DexFile& dex_file) const; 344 345 // Get memory usage during compilation. 346 std::string GetMemoryUsageString(bool extended) const; 347 348 void SetHadHardVerifierFailure() { 349 had_hard_verifier_failure_ = true; 350 } 351 352 Compiler::Kind GetCompilerKind() { 353 return compiler_kind_; 354 } 355 356 CompiledMethodStorage* GetCompiledMethodStorage() { 357 return &compiled_method_storage_; 358 } 359 360 // Can we assume that the klass is loaded? 361 bool CanAssumeClassIsLoaded(mirror::Class* klass) 362 REQUIRES_SHARED(Locks::mutator_lock_); 363 364 bool MayInline(const DexFile* inlined_from, const DexFile* inlined_into) const { 365 if (!kIsTargetBuild) { 366 return MayInlineInternal(inlined_from, inlined_into); 367 } 368 return true; 369 } 370 371 void MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref) 372 REQUIRES(!dex_to_dex_references_lock_); 373 374 const BitVector* GetCurrentDexToDexMethods() const { 375 return current_dex_to_dex_methods_; 376 } 377 378 // Compute constant code and method pointers when possible. 379 void GetCodeAndMethodForDirectCall(const mirror::Class* referrer_class, 380 ArtMethod* method, 381 /* out */ uintptr_t* direct_code, 382 /* out */ uintptr_t* direct_method) 383 REQUIRES_SHARED(Locks::mutator_lock_); 384 385 private: 386 // Return whether the declaring class of `resolved_member` is 387 // available to `referrer_class` for read or write access using two 388 // Boolean values returned as a pair. If is true at least for read 389 // access, compute the type index of the declaring class in the 390 // referrer's dex file and return it through the out argument 391 // `storage_index`; otherwise return DexFile::kDexNoIndex through 392 // `storage_index`. 393 template <typename ArtMember> 394 std::pair<bool, bool> IsClassOfStaticMemberAvailableToReferrer(mirror::DexCache* dex_cache, 395 mirror::Class* referrer_class, 396 ArtMember* resolved_member, 397 uint16_t member_idx, 398 uint32_t* storage_index) 399 REQUIRES_SHARED(Locks::mutator_lock_); 400 401 // Can `referrer_class` access the resolved `member`? 402 // Dispatch call to mirror::Class::CanAccessResolvedField or 403 // mirror::Class::CanAccessResolvedMember depending on the value of 404 // ArtMember. 405 template <typename ArtMember> 406 static bool CanAccessResolvedMember(mirror::Class* referrer_class, 407 mirror::Class* access_to, 408 ArtMember* member, 409 mirror::DexCache* dex_cache, 410 uint32_t field_idx) 411 REQUIRES_SHARED(Locks::mutator_lock_); 412 413 mirror::ClassLoader* GetClassLoader(const ScopedObjectAccess& soa, 414 const DexCompilationUnit* mUnit) 415 REQUIRES_SHARED(Locks::mutator_lock_); 416 417 private: 418 void PreCompile(jobject class_loader, 419 const std::vector<const DexFile*>& dex_files, 420 verifier::VerifierDeps* verifier_deps, 421 TimingLogger* timings) 422 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 423 424 void LoadImageClasses(TimingLogger* timings) REQUIRES(!Locks::mutator_lock_); 425 426 // Attempt to resolve all type, methods, fields, and strings 427 // referenced from code in the dex file following PathClassLoader 428 // ordering semantics. 429 void Resolve(jobject class_loader, 430 const std::vector<const DexFile*>& dex_files, 431 TimingLogger* timings) 432 REQUIRES(!Locks::mutator_lock_); 433 void ResolveDexFile(jobject class_loader, 434 const DexFile& dex_file, 435 const std::vector<const DexFile*>& dex_files, 436 ThreadPool* thread_pool, 437 size_t thread_count, 438 TimingLogger* timings) 439 REQUIRES(!Locks::mutator_lock_); 440 441 void Verify(jobject class_loader, 442 const std::vector<const DexFile*>& dex_files, 443 verifier::VerifierDeps* verifier_deps, 444 TimingLogger* timings); 445 446 void VerifyDexFile(jobject class_loader, 447 const DexFile& dex_file, 448 const std::vector<const DexFile*>& dex_files, 449 ThreadPool* thread_pool, 450 size_t thread_count, 451 TimingLogger* timings) 452 REQUIRES(!Locks::mutator_lock_); 453 454 void SetVerified(jobject class_loader, 455 const std::vector<const DexFile*>& dex_files, 456 TimingLogger* timings); 457 void SetVerifiedDexFile(jobject class_loader, 458 const DexFile& dex_file, 459 const std::vector<const DexFile*>& dex_files, 460 ThreadPool* thread_pool, 461 size_t thread_count, 462 TimingLogger* timings) 463 REQUIRES(!Locks::mutator_lock_); 464 465 void InitializeClasses(jobject class_loader, 466 const std::vector<const DexFile*>& dex_files, 467 TimingLogger* timings) 468 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 469 void InitializeClasses(jobject class_loader, 470 const DexFile& dex_file, 471 const std::vector<const DexFile*>& dex_files, 472 TimingLogger* timings) 473 REQUIRES(!Locks::mutator_lock_, !compiled_classes_lock_); 474 475 void UpdateImageClasses(TimingLogger* timings) REQUIRES(!Locks::mutator_lock_); 476 477 void Compile(jobject class_loader, 478 const std::vector<const DexFile*>& dex_files, 479 TimingLogger* timings) REQUIRES(!dex_to_dex_references_lock_); 480 void CompileDexFile(jobject class_loader, 481 const DexFile& dex_file, 482 const std::vector<const DexFile*>& dex_files, 483 ThreadPool* thread_pool, 484 size_t thread_count, 485 TimingLogger* timings) 486 REQUIRES(!Locks::mutator_lock_); 487 488 bool MayInlineInternal(const DexFile* inlined_from, const DexFile* inlined_into) const; 489 490 void InitializeThreadPools(); 491 void FreeThreadPools(); 492 void CheckThreadPools(); 493 494 bool RequiresConstructorBarrier(const DexFile& dex_file, uint16_t class_def_idx) const; 495 496 const CompilerOptions* const compiler_options_; 497 VerificationResults* const verification_results_; 498 499 std::unique_ptr<Compiler> compiler_; 500 Compiler::Kind compiler_kind_; 501 502 const InstructionSet instruction_set_; 503 const InstructionSetFeatures* const instruction_set_features_; 504 505 // All class references that require constructor barriers. If the class reference is not in the 506 // set then the result has not yet been computed. 507 mutable ReaderWriterMutex requires_constructor_barrier_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 508 std::map<ClassReference, bool> requires_constructor_barrier_ 509 GUARDED_BY(requires_constructor_barrier_lock_); 510 511 typedef SafeMap<const ClassReference, CompiledClass*> ClassTable; 512 // All class references that this compiler has compiled. 513 mutable Mutex compiled_classes_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 514 ClassTable compiled_classes_ GUARDED_BY(compiled_classes_lock_); 515 516 typedef SafeMap<const MethodReference, CompiledMethod*, MethodReferenceComparator> MethodTable; 517 518 public: 519 // Lock is public so that non-members can have lock annotations. 520 mutable Mutex compiled_methods_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 521 522 private: 523 // All method references that this compiler has compiled. 524 MethodTable compiled_methods_ GUARDED_BY(compiled_methods_lock_); 525 // Number of non-relative patches in all compiled methods. These patches need space 526 // in the .oat_patches ELF section if requested in the compiler options. 527 size_t non_relative_linker_patch_count_ GUARDED_BY(compiled_methods_lock_); 528 529 // If image_ is true, specifies the classes that will be included in the image. 530 // Note if image_classes_ is null, all classes are included in the image. 531 std::unique_ptr<std::unordered_set<std::string>> image_classes_; 532 533 // Specifies the classes that will be compiled. Note that if classes_to_compile_ is null, 534 // all classes are eligible for compilation (duplication filters etc. will still apply). 535 // This option may be restricted to the boot image, depending on a flag in the implementation. 536 std::unique_ptr<std::unordered_set<std::string>> classes_to_compile_; 537 538 // Specifies the methods that will be compiled. Note that if methods_to_compile_ is null, 539 // all methods are eligible for compilation (compilation filters etc. will still apply). 540 // This option may be restricted to the boot image, depending on a flag in the implementation. 541 std::unique_ptr<std::unordered_set<std::string>> methods_to_compile_; 542 543 bool had_hard_verifier_failure_; 544 545 // A thread pool that can (potentially) run tasks in parallel. 546 std::unique_ptr<ThreadPool> parallel_thread_pool_; 547 size_t parallel_thread_count_; 548 549 // A thread pool that guarantees running single-threaded on the main thread. 550 std::unique_ptr<ThreadPool> single_thread_pool_; 551 552 class AOTCompilationStats; 553 std::unique_ptr<AOTCompilationStats> stats_; 554 555 bool dump_stats_; 556 const bool dump_passes_; 557 558 CumulativeLogger* const timings_logger_; 559 560 typedef void (*CompilerCallbackFn)(CompilerDriver& driver); 561 typedef MutexLock* (*CompilerMutexLockFn)(CompilerDriver& driver); 562 563 void* compiler_context_; 564 565 bool support_boot_image_fixup_; 566 567 // List of dex files that will be stored in the oat file. 568 const std::vector<const DexFile*>* dex_files_for_oat_file_; 569 570 CompiledMethodStorage compiled_method_storage_; 571 572 // Info for profile guided compilation. 573 const ProfileCompilationInfo* const profile_compilation_info_; 574 575 size_t max_arena_alloc_; 576 577 // Data for delaying dex-to-dex compilation. 578 Mutex dex_to_dex_references_lock_; 579 // In the first phase, dex_to_dex_references_ collects methods for dex-to-dex compilation. 580 class DexFileMethodSet; 581 std::vector<DexFileMethodSet> dex_to_dex_references_ GUARDED_BY(dex_to_dex_references_lock_); 582 // In the second phase, current_dex_to_dex_methods_ points to the BitVector with method 583 // indexes for dex-to-dex compilation in the current dex file. 584 const BitVector* current_dex_to_dex_methods_; 585 586 friend class CompileClassVisitor; 587 friend class verifier::VerifierDepsTest; 588 DISALLOW_COPY_AND_ASSIGN(CompilerDriver); 589}; 590 591} // namespace art 592 593#endif // ART_COMPILER_DRIVER_COMPILER_DRIVER_H_ 594