compiler_driver.cc revision 84c072c348006d87a370ad6e746e2d976cbe62f2
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#include "compiler_driver.h" 18 19#define ATRACE_TAG ATRACE_TAG_DALVIK 20#include <utils/Trace.h> 21 22#include <vector> 23#include <unistd.h> 24 25#include "base/stl_util.h" 26#include "base/timing_logger.h" 27#include "class_linker.h" 28#include "dex_compilation_unit.h" 29#include "dex_file-inl.h" 30#include "dex/verification_results.h" 31#include "dex/verified_method.h" 32#include "dex/quick/dex_file_method_inliner.h" 33#include "jni_internal.h" 34#include "object_utils.h" 35#include "runtime.h" 36#include "gc/accounting/card_table-inl.h" 37#include "gc/accounting/heap_bitmap.h" 38#include "gc/space/space.h" 39#include "mirror/art_field-inl.h" 40#include "mirror/art_method-inl.h" 41#include "mirror/class_loader.h" 42#include "mirror/class-inl.h" 43#include "mirror/dex_cache-inl.h" 44#include "mirror/object-inl.h" 45#include "mirror/object_array-inl.h" 46#include "mirror/throwable.h" 47#include "scoped_thread_state_change.h" 48#include "ScopedLocalRef.h" 49#include "thread.h" 50#include "thread_pool.h" 51#include "trampolines/trampoline_compiler.h" 52#include "transaction.h" 53#include "verifier/method_verifier.h" 54#include "verifier/method_verifier-inl.h" 55 56#if defined(ART_USE_PORTABLE_COMPILER) 57#include "elf_writer_mclinker.h" 58#else 59#include "elf_writer_quick.h" 60#endif 61 62namespace art { 63 64static double Percentage(size_t x, size_t y) { 65 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 66} 67 68static void DumpStat(size_t x, size_t y, const char* str) { 69 if (x == 0 && y == 0) { 70 return; 71 } 72 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 73} 74 75class AOTCompilationStats { 76 public: 77 AOTCompilationStats() 78 : stats_lock_("AOT compilation statistics lock"), 79 types_in_dex_cache_(0), types_not_in_dex_cache_(0), 80 strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), 81 resolved_types_(0), unresolved_types_(0), 82 resolved_instance_fields_(0), unresolved_instance_fields_(0), 83 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 84 type_based_devirtualization_(0), 85 safe_casts_(0), not_safe_casts_(0) { 86 for (size_t i = 0; i <= kMaxInvokeType; i++) { 87 resolved_methods_[i] = 0; 88 unresolved_methods_[i] = 0; 89 virtual_made_direct_[i] = 0; 90 direct_calls_to_boot_[i] = 0; 91 direct_methods_to_boot_[i] = 0; 92 } 93 } 94 95 void Dump() { 96 DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); 97 DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); 98 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 99 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 100 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 101 "static fields resolved"); 102 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 103 "static fields local to a class"); 104 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 105 // Note, the code below subtracts the stat value so that when added to the stat value we have 106 // 100% of samples. TODO: clean this up. 107 DumpStat(type_based_devirtualization_, 108 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 109 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 110 type_based_devirtualization_, 111 "virtual/interface calls made direct based on type information"); 112 113 for (size_t i = 0; i <= kMaxInvokeType; i++) { 114 std::ostringstream oss; 115 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 116 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 117 if (virtual_made_direct_[i] > 0) { 118 std::ostringstream oss2; 119 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 120 DumpStat(virtual_made_direct_[i], 121 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 122 oss2.str().c_str()); 123 } 124 if (direct_calls_to_boot_[i] > 0) { 125 std::ostringstream oss2; 126 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 127 DumpStat(direct_calls_to_boot_[i], 128 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 129 oss2.str().c_str()); 130 } 131 if (direct_methods_to_boot_[i] > 0) { 132 std::ostringstream oss2; 133 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 134 DumpStat(direct_methods_to_boot_[i], 135 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 136 oss2.str().c_str()); 137 } 138 } 139 } 140 141// Allow lossy statistics in non-debug builds. 142#ifndef NDEBUG 143#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 144#else 145#define STATS_LOCK() 146#endif 147 148 void TypeInDexCache() { 149 STATS_LOCK(); 150 types_in_dex_cache_++; 151 } 152 153 void TypeNotInDexCache() { 154 STATS_LOCK(); 155 types_not_in_dex_cache_++; 156 } 157 158 void StringInDexCache() { 159 STATS_LOCK(); 160 strings_in_dex_cache_++; 161 } 162 163 void StringNotInDexCache() { 164 STATS_LOCK(); 165 strings_not_in_dex_cache_++; 166 } 167 168 void TypeDoesntNeedAccessCheck() { 169 STATS_LOCK(); 170 resolved_types_++; 171 } 172 173 void TypeNeedsAccessCheck() { 174 STATS_LOCK(); 175 unresolved_types_++; 176 } 177 178 void ResolvedInstanceField() { 179 STATS_LOCK(); 180 resolved_instance_fields_++; 181 } 182 183 void UnresolvedInstanceField() { 184 STATS_LOCK(); 185 unresolved_instance_fields_++; 186 } 187 188 void ResolvedLocalStaticField() { 189 STATS_LOCK(); 190 resolved_local_static_fields_++; 191 } 192 193 void ResolvedStaticField() { 194 STATS_LOCK(); 195 resolved_static_fields_++; 196 } 197 198 void UnresolvedStaticField() { 199 STATS_LOCK(); 200 unresolved_static_fields_++; 201 } 202 203 // Indicate that type information from the verifier led to devirtualization. 204 void PreciseTypeDevirtualization() { 205 STATS_LOCK(); 206 type_based_devirtualization_++; 207 } 208 209 // Indicate that a method of the given type was resolved at compile time. 210 void ResolvedMethod(InvokeType type) { 211 DCHECK_LE(type, kMaxInvokeType); 212 STATS_LOCK(); 213 resolved_methods_[type]++; 214 } 215 216 // Indicate that a method of the given type was unresolved at compile time as it was in an 217 // unknown dex file. 218 void UnresolvedMethod(InvokeType type) { 219 DCHECK_LE(type, kMaxInvokeType); 220 STATS_LOCK(); 221 unresolved_methods_[type]++; 222 } 223 224 // Indicate that a type of virtual method dispatch has been converted into a direct method 225 // dispatch. 226 void VirtualMadeDirect(InvokeType type) { 227 DCHECK(type == kVirtual || type == kInterface || type == kSuper); 228 STATS_LOCK(); 229 virtual_made_direct_[type]++; 230 } 231 232 // Indicate that a method of the given type was able to call directly into boot. 233 void DirectCallsToBoot(InvokeType type) { 234 DCHECK_LE(type, kMaxInvokeType); 235 STATS_LOCK(); 236 direct_calls_to_boot_[type]++; 237 } 238 239 // Indicate that a method of the given type was able to be resolved directly from boot. 240 void DirectMethodsToBoot(InvokeType type) { 241 DCHECK_LE(type, kMaxInvokeType); 242 STATS_LOCK(); 243 direct_methods_to_boot_[type]++; 244 } 245 246 // A check-cast could be eliminated due to verifier type analysis. 247 void SafeCast() { 248 STATS_LOCK(); 249 safe_casts_++; 250 } 251 252 // A check-cast couldn't be eliminated due to verifier type analysis. 253 void NotASafeCast() { 254 STATS_LOCK(); 255 not_safe_casts_++; 256 } 257 258 private: 259 Mutex stats_lock_; 260 261 size_t types_in_dex_cache_; 262 size_t types_not_in_dex_cache_; 263 264 size_t strings_in_dex_cache_; 265 size_t strings_not_in_dex_cache_; 266 267 size_t resolved_types_; 268 size_t unresolved_types_; 269 270 size_t resolved_instance_fields_; 271 size_t unresolved_instance_fields_; 272 273 size_t resolved_local_static_fields_; 274 size_t resolved_static_fields_; 275 size_t unresolved_static_fields_; 276 // Type based devirtualization for invoke interface and virtual. 277 size_t type_based_devirtualization_; 278 279 size_t resolved_methods_[kMaxInvokeType + 1]; 280 size_t unresolved_methods_[kMaxInvokeType + 1]; 281 size_t virtual_made_direct_[kMaxInvokeType + 1]; 282 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 283 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 284 285 size_t safe_casts_; 286 size_t not_safe_casts_; 287 288 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 289}; 290 291extern "C" void ArtInitCompilerContext(art::CompilerDriver& driver); 292extern "C" void ArtInitQuickCompilerContext(art::CompilerDriver& driver); 293 294extern "C" void ArtUnInitCompilerContext(art::CompilerDriver& driver); 295extern "C" void ArtUnInitQuickCompilerContext(art::CompilerDriver& driver); 296 297extern "C" art::CompiledMethod* ArtCompileMethod(art::CompilerDriver& driver, 298 const art::DexFile::CodeItem* code_item, 299 uint32_t access_flags, 300 art::InvokeType invoke_type, 301 uint16_t class_def_idx, 302 uint32_t method_idx, 303 jobject class_loader, 304 const art::DexFile& dex_file); 305extern "C" art::CompiledMethod* ArtQuickCompileMethod(art::CompilerDriver& compiler, 306 const art::DexFile::CodeItem* code_item, 307 uint32_t access_flags, 308 art::InvokeType invoke_type, 309 uint16_t class_def_idx, 310 uint32_t method_idx, 311 jobject class_loader, 312 const art::DexFile& dex_file); 313 314extern "C" art::CompiledMethod* ArtCompileDEX(art::CompilerDriver& compiler, 315 const art::DexFile::CodeItem* code_item, 316 uint32_t access_flags, 317 art::InvokeType invoke_type, 318 uint16_t class_def_idx, 319 uint32_t method_idx, 320 jobject class_loader, 321 const art::DexFile& dex_file); 322#ifdef ART_SEA_IR_MODE 323extern "C" art::CompiledMethod* SeaIrCompileMethod(art::CompilerDriver& compiler, 324 const art::DexFile::CodeItem* code_item, 325 uint32_t access_flags, 326 art::InvokeType invoke_type, 327 uint16_t class_def_idx, 328 uint32_t method_idx, 329 jobject class_loader, 330 const art::DexFile& dex_file); 331#endif 332extern "C" art::CompiledMethod* ArtLLVMJniCompileMethod(art::CompilerDriver& driver, 333 uint32_t access_flags, uint32_t method_idx, 334 const art::DexFile& dex_file); 335 336extern "C" art::CompiledMethod* ArtQuickJniCompileMethod(art::CompilerDriver& compiler, 337 uint32_t access_flags, uint32_t method_idx, 338 const art::DexFile& dex_file); 339 340extern "C" void compilerLLVMSetBitcodeFileName(art::CompilerDriver& driver, 341 std::string const& filename); 342 343CompilerDriver::CompilerDriver(VerificationResults* verification_results, 344 DexFileToMethodInlinerMap* method_inliner_map, 345 CompilerBackend compiler_backend, InstructionSet instruction_set, 346 InstructionSetFeatures instruction_set_features, 347 bool image, DescriptorSet* image_classes, size_t thread_count, 348 bool dump_stats, bool dump_passes, CumulativeLogger* timer) 349 : verification_results_(verification_results), 350 method_inliner_map_(method_inliner_map), 351 compiler_backend_(compiler_backend), 352 instruction_set_(instruction_set), 353 instruction_set_features_(instruction_set_features), 354 freezing_constructor_lock_("freezing constructor lock"), 355 compiled_classes_lock_("compiled classes lock"), 356 compiled_methods_lock_("compiled method lock"), 357 image_(image), 358 image_classes_(image_classes), 359 thread_count_(thread_count), 360 start_ns_(0), 361 stats_(new AOTCompilationStats), 362 dump_stats_(dump_stats), 363 dump_passes_(dump_passes), 364 timings_logger_(timer), 365 compiler_library_(NULL), 366 compiler_(NULL), 367 compiler_context_(NULL), 368 jni_compiler_(NULL), 369 compiler_enable_auto_elf_loading_(NULL), 370 compiler_get_method_code_addr_(NULL), 371 support_boot_image_fixup_(instruction_set != kMips), 372 dedupe_code_("dedupe code"), 373 dedupe_mapping_table_("dedupe mapping table"), 374 dedupe_vmap_table_("dedupe vmap table"), 375 dedupe_gc_map_("dedupe gc map") { 376 377 CHECK_PTHREAD_CALL(pthread_key_create, (&tls_key_, NULL), "compiler tls key"); 378 379 // TODO: more work needed to combine initializations and allow per-method backend selection 380 typedef void (*InitCompilerContextFn)(CompilerDriver&); 381 InitCompilerContextFn init_compiler_context; 382 if (compiler_backend_ == kPortable) { 383 // Initialize compiler_context_ 384 init_compiler_context = reinterpret_cast<void (*)(CompilerDriver&)>(ArtInitCompilerContext); 385 compiler_ = reinterpret_cast<CompilerFn>(ArtCompileMethod); 386 } else { 387 init_compiler_context = reinterpret_cast<void (*)(CompilerDriver&)>(ArtInitQuickCompilerContext); 388 compiler_ = reinterpret_cast<CompilerFn>(ArtQuickCompileMethod); 389 } 390 391 dex_to_dex_compiler_ = reinterpret_cast<DexToDexCompilerFn>(ArtCompileDEX); 392 393#ifdef ART_SEA_IR_MODE 394 sea_ir_compiler_ = NULL; 395 if (Runtime::Current()->IsSeaIRMode()) { 396 sea_ir_compiler_ = reinterpret_cast<CompilerFn>(SeaIrCompileMethod); 397 } 398#endif 399 400 init_compiler_context(*this); 401 402 if (compiler_backend_ == kPortable) { 403 jni_compiler_ = reinterpret_cast<JniCompilerFn>(ArtLLVMJniCompileMethod); 404 } else { 405 jni_compiler_ = reinterpret_cast<JniCompilerFn>(ArtQuickJniCompileMethod); 406 } 407 408 CHECK(!Runtime::Current()->IsStarted()); 409 if (!image_) { 410 CHECK(image_classes_.get() == NULL); 411 } 412} 413 414std::vector<uint8_t>* CompilerDriver::DeduplicateCode(const std::vector<uint8_t>& code) { 415 return dedupe_code_.Add(Thread::Current(), code); 416} 417 418std::vector<uint8_t>* CompilerDriver::DeduplicateMappingTable(const std::vector<uint8_t>& code) { 419 return dedupe_mapping_table_.Add(Thread::Current(), code); 420} 421 422std::vector<uint8_t>* CompilerDriver::DeduplicateVMapTable(const std::vector<uint8_t>& code) { 423 return dedupe_vmap_table_.Add(Thread::Current(), code); 424} 425 426std::vector<uint8_t>* CompilerDriver::DeduplicateGCMap(const std::vector<uint8_t>& code) { 427 return dedupe_gc_map_.Add(Thread::Current(), code); 428} 429 430CompilerDriver::~CompilerDriver() { 431 Thread* self = Thread::Current(); 432 { 433 MutexLock mu(self, compiled_classes_lock_); 434 STLDeleteValues(&compiled_classes_); 435 } 436 { 437 MutexLock mu(self, compiled_methods_lock_); 438 STLDeleteValues(&compiled_methods_); 439 } 440 { 441 MutexLock mu(self, compiled_methods_lock_); 442 STLDeleteElements(&code_to_patch_); 443 } 444 { 445 MutexLock mu(self, compiled_methods_lock_); 446 STLDeleteElements(&methods_to_patch_); 447 } 448 { 449 MutexLock mu(self, compiled_methods_lock_); 450 STLDeleteElements(&classes_to_patch_); 451 } 452 CHECK_PTHREAD_CALL(pthread_key_delete, (tls_key_), "delete tls key"); 453 typedef void (*UninitCompilerContextFn)(CompilerDriver&); 454 UninitCompilerContextFn uninit_compiler_context; 455 // Uninitialize compiler_context_ 456 // TODO: rework to combine initialization/uninitialization 457 if (compiler_backend_ == kPortable) { 458 uninit_compiler_context = reinterpret_cast<void (*)(CompilerDriver&)>(ArtUnInitCompilerContext); 459 } else { 460 uninit_compiler_context = reinterpret_cast<void (*)(CompilerDriver&)>(ArtUnInitQuickCompilerContext); 461 } 462 uninit_compiler_context(*this); 463} 464 465CompilerTls* CompilerDriver::GetTls() { 466 // Lazily create thread-local storage 467 CompilerTls* res = static_cast<CompilerTls*>(pthread_getspecific(tls_key_)); 468 if (res == NULL) { 469 res = new CompilerTls(); 470 CHECK_PTHREAD_CALL(pthread_setspecific, (tls_key_, res), "compiler tls"); 471 } 472 return res; 473} 474 475const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToInterpreterBridge() const { 476 return CreateTrampoline(instruction_set_, kInterpreterAbi, 477 INTERPRETER_ENTRYPOINT_OFFSET(pInterpreterToInterpreterBridge)); 478} 479 480const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToCompiledCodeBridge() const { 481 return CreateTrampoline(instruction_set_, kInterpreterAbi, 482 INTERPRETER_ENTRYPOINT_OFFSET(pInterpreterToCompiledCodeBridge)); 483} 484 485const std::vector<uint8_t>* CompilerDriver::CreateJniDlsymLookup() const { 486 return CreateTrampoline(instruction_set_, kJniAbi, JNI_ENTRYPOINT_OFFSET(pDlsymLookup)); 487} 488 489const std::vector<uint8_t>* CompilerDriver::CreatePortableImtConflictTrampoline() const { 490 return CreateTrampoline(instruction_set_, kPortableAbi, 491 PORTABLE_ENTRYPOINT_OFFSET(pPortableImtConflictTrampoline)); 492} 493 494const std::vector<uint8_t>* CompilerDriver::CreatePortableResolutionTrampoline() const { 495 return CreateTrampoline(instruction_set_, kPortableAbi, 496 PORTABLE_ENTRYPOINT_OFFSET(pPortableResolutionTrampoline)); 497} 498 499const std::vector<uint8_t>* CompilerDriver::CreatePortableToInterpreterBridge() const { 500 return CreateTrampoline(instruction_set_, kPortableAbi, 501 PORTABLE_ENTRYPOINT_OFFSET(pPortableToInterpreterBridge)); 502} 503 504const std::vector<uint8_t>* CompilerDriver::CreateQuickImtConflictTrampoline() const { 505 return CreateTrampoline(instruction_set_, kQuickAbi, 506 QUICK_ENTRYPOINT_OFFSET(pQuickImtConflictTrampoline)); 507} 508 509const std::vector<uint8_t>* CompilerDriver::CreateQuickResolutionTrampoline() const { 510 return CreateTrampoline(instruction_set_, kQuickAbi, 511 QUICK_ENTRYPOINT_OFFSET(pQuickResolutionTrampoline)); 512} 513 514const std::vector<uint8_t>* CompilerDriver::CreateQuickToInterpreterBridge() const { 515 return CreateTrampoline(instruction_set_, kQuickAbi, 516 QUICK_ENTRYPOINT_OFFSET(pQuickToInterpreterBridge)); 517} 518 519void CompilerDriver::CompileAll(jobject class_loader, 520 const std::vector<const DexFile*>& dex_files, 521 TimingLogger& timings) { 522 DCHECK(!Runtime::Current()->IsStarted()); 523 UniquePtr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", thread_count_ - 1)); 524 PreCompile(class_loader, dex_files, *thread_pool.get(), timings); 525 Compile(class_loader, dex_files, *thread_pool.get(), timings); 526 if (dump_stats_) { 527 stats_->Dump(); 528 } 529} 530 531static DexToDexCompilationLevel GetDexToDexCompilationlevel( 532 SirtRef<mirror::ClassLoader>& class_loader, const DexFile& dex_file, 533 const DexFile::ClassDef& class_def) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 534 const char* descriptor = dex_file.GetClassDescriptor(class_def); 535 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 536 mirror::Class* klass = class_linker->FindClass(descriptor, class_loader); 537 if (klass == NULL) { 538 Thread* self = Thread::Current(); 539 CHECK(self->IsExceptionPending()); 540 self->ClearException(); 541 return kDontDexToDexCompile; 542 } 543 // The verifier can only run on "quick" instructions at runtime (see usage of 544 // FindAccessedFieldAtDexPc and FindInvokedMethodAtDexPc in ThrowNullPointerExceptionFromDexPC 545 // function). Since image classes can be verified again while compiling an application, 546 // we must prevent the DEX-to-DEX compiler from introducing them. 547 // TODO: find a way to enable "quick" instructions for image classes and remove this check. 548 bool compiling_image_classes = class_loader.get() == nullptr; 549 if (compiling_image_classes) { 550 return kRequired; 551 } else if (klass->IsVerified()) { 552 // Class is verified so we can enable DEX-to-DEX compilation for performance. 553 return kOptimize; 554 } else if (klass->IsCompileTimeVerified()) { 555 // Class verification has soft-failed. Anyway, ensure at least correctness. 556 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 557 return kRequired; 558 } else { 559 // Class verification has failed: do not run DEX-to-DEX compilation. 560 return kDontDexToDexCompile; 561 } 562} 563 564void CompilerDriver::CompileOne(mirror::ArtMethod* method, TimingLogger& timings) { 565 DCHECK(!Runtime::Current()->IsStarted()); 566 Thread* self = Thread::Current(); 567 jobject jclass_loader; 568 const DexFile* dex_file; 569 uint16_t class_def_idx; 570 uint32_t method_idx = method->GetDexMethodIndex(); 571 uint32_t access_flags = method->GetAccessFlags(); 572 InvokeType invoke_type = method->GetInvokeType(); 573 { 574 ScopedObjectAccessUnchecked soa(self); 575 ScopedLocalRef<jobject> 576 local_class_loader(soa.Env(), 577 soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 578 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 579 // Find the dex_file 580 MethodHelper mh(method); 581 dex_file = &mh.GetDexFile(); 582 class_def_idx = mh.GetClassDefIndex(); 583 } 584 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 585 self->TransitionFromRunnableToSuspended(kNative); 586 587 std::vector<const DexFile*> dex_files; 588 dex_files.push_back(dex_file); 589 590 UniquePtr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", 0U)); 591 PreCompile(jclass_loader, dex_files, *thread_pool.get(), timings); 592 593 // Can we run DEX-to-DEX compiler on this class ? 594 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 595 { 596 ScopedObjectAccess soa(Thread::Current()); 597 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_idx); 598 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), 599 soa.Decode<mirror::ClassLoader*>(jclass_loader)); 600 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(class_loader, *dex_file, class_def); 601 } 602 CompileMethod(code_item, access_flags, invoke_type, class_def_idx, method_idx, jclass_loader, 603 *dex_file, dex_to_dex_compilation_level); 604 605 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 606 607 self->TransitionFromSuspendedToRunnable(); 608} 609 610void CompilerDriver::Resolve(jobject class_loader, const std::vector<const DexFile*>& dex_files, 611 ThreadPool& thread_pool, TimingLogger& timings) { 612 for (size_t i = 0; i != dex_files.size(); ++i) { 613 const DexFile* dex_file = dex_files[i]; 614 CHECK(dex_file != NULL); 615 ResolveDexFile(class_loader, *dex_file, thread_pool, timings); 616 } 617} 618 619void CompilerDriver::PreCompile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 620 ThreadPool& thread_pool, TimingLogger& timings) { 621 LoadImageClasses(timings); 622 623 Resolve(class_loader, dex_files, thread_pool, timings); 624 625 Verify(class_loader, dex_files, thread_pool, timings); 626 627 InitializeClasses(class_loader, dex_files, thread_pool, timings); 628 629 UpdateImageClasses(timings); 630} 631 632bool CompilerDriver::IsImageClass(const char* descriptor) const { 633 if (!IsImage()) { 634 return true; 635 } else { 636 return image_classes_->find(descriptor) != image_classes_->end(); 637 } 638} 639 640static void ResolveExceptionsForMethod(MethodHelper* mh, 641 std::set<std::pair<uint16_t, const DexFile*> >& exceptions_to_resolve) 642 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 643 const DexFile::CodeItem* code_item = mh->GetCodeItem(); 644 if (code_item == NULL) { 645 return; // native or abstract method 646 } 647 if (code_item->tries_size_ == 0) { 648 return; // nothing to process 649 } 650 const byte* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 651 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 652 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 653 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 654 bool has_catch_all = false; 655 if (encoded_catch_handler_size <= 0) { 656 encoded_catch_handler_size = -encoded_catch_handler_size; 657 has_catch_all = true; 658 } 659 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 660 uint16_t encoded_catch_handler_handlers_type_idx = 661 DecodeUnsignedLeb128(&encoded_catch_handler_list); 662 // Add to set of types to resolve if not already in the dex cache resolved types 663 if (!mh->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 664 exceptions_to_resolve.insert( 665 std::pair<uint16_t, const DexFile*>(encoded_catch_handler_handlers_type_idx, 666 &mh->GetDexFile())); 667 } 668 // ignore address associated with catch handler 669 DecodeUnsignedLeb128(&encoded_catch_handler_list); 670 } 671 if (has_catch_all) { 672 // ignore catch all address 673 DecodeUnsignedLeb128(&encoded_catch_handler_list); 674 } 675 } 676} 677 678static bool ResolveCatchBlockExceptionsClassVisitor(mirror::Class* c, void* arg) 679 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 680 std::set<std::pair<uint16_t, const DexFile*> >* exceptions_to_resolve = 681 reinterpret_cast<std::set<std::pair<uint16_t, const DexFile*> >*>(arg); 682 MethodHelper mh; 683 for (size_t i = 0; i < c->NumVirtualMethods(); ++i) { 684 mirror::ArtMethod* m = c->GetVirtualMethod(i); 685 mh.ChangeMethod(m); 686 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 687 } 688 for (size_t i = 0; i < c->NumDirectMethods(); ++i) { 689 mirror::ArtMethod* m = c->GetDirectMethod(i); 690 mh.ChangeMethod(m); 691 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 692 } 693 return true; 694} 695 696static bool RecordImageClassesVisitor(mirror::Class* klass, void* arg) 697 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 698 CompilerDriver::DescriptorSet* image_classes = 699 reinterpret_cast<CompilerDriver::DescriptorSet*>(arg); 700 image_classes->insert(ClassHelper(klass).GetDescriptor()); 701 return true; 702} 703 704// Make a list of descriptors for classes to include in the image 705void CompilerDriver::LoadImageClasses(TimingLogger& timings) 706 LOCKS_EXCLUDED(Locks::mutator_lock_) { 707 if (!IsImage()) { 708 return; 709 } 710 711 timings.NewSplit("LoadImageClasses"); 712 // Make a first class to load all classes explicitly listed in the file 713 Thread* self = Thread::Current(); 714 ScopedObjectAccess soa(self); 715 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 716 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 717 const std::string& descriptor(*it); 718 SirtRef<mirror::Class> klass(self, class_linker->FindSystemClass(descriptor.c_str())); 719 if (klass.get() == NULL) { 720 VLOG(compiler) << "Failed to find class " << descriptor; 721 image_classes_->erase(it++); 722 self->ClearException(); 723 } else { 724 ++it; 725 } 726 } 727 728 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 729 // exceptions are resolved by the verifier when there is a catch block in an interested method. 730 // Do this here so that exception classes appear to have been specified image classes. 731 std::set<std::pair<uint16_t, const DexFile*> > unresolved_exception_types; 732 SirtRef<mirror::Class> java_lang_Throwable(self, 733 class_linker->FindSystemClass("Ljava/lang/Throwable;")); 734 do { 735 unresolved_exception_types.clear(); 736 class_linker->VisitClasses(ResolveCatchBlockExceptionsClassVisitor, 737 &unresolved_exception_types); 738 for (const std::pair<uint16_t, const DexFile*>& exception_type : unresolved_exception_types) { 739 uint16_t exception_type_idx = exception_type.first; 740 const DexFile* dex_file = exception_type.second; 741 SirtRef<mirror::DexCache> dex_cache(self, class_linker->FindDexCache(*dex_file)); 742 SirtRef<mirror::ClassLoader> class_loader(self, nullptr); 743 SirtRef<mirror::Class> klass(self, class_linker->ResolveType(*dex_file, exception_type_idx, 744 dex_cache, class_loader)); 745 if (klass.get() == NULL) { 746 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 747 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 748 LOG(FATAL) << "Failed to resolve class " << descriptor; 749 } 750 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.get())); 751 } 752 // Resolving exceptions may load classes that reference more exceptions, iterate until no 753 // more are found 754 } while (!unresolved_exception_types.empty()); 755 756 // We walk the roots looking for classes so that we'll pick up the 757 // above classes plus any classes them depend on such super 758 // classes, interfaces, and the required ClassLinker roots. 759 class_linker->VisitClasses(RecordImageClassesVisitor, image_classes_.get()); 760 761 CHECK_NE(image_classes_->size(), 0U); 762} 763 764static void MaybeAddToImageClasses(mirror::Class* klass, CompilerDriver::DescriptorSet* image_classes) 765 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 766 while (!klass->IsObjectClass()) { 767 ClassHelper kh(klass); 768 const char* descriptor = kh.GetDescriptor(); 769 std::pair<CompilerDriver::DescriptorSet::iterator, bool> result = 770 image_classes->insert(descriptor); 771 if (result.second) { 772 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 773 } else { 774 return; 775 } 776 for (size_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 777 MaybeAddToImageClasses(kh.GetDirectInterface(i), image_classes); 778 } 779 if (klass->IsArrayClass()) { 780 MaybeAddToImageClasses(klass->GetComponentType(), image_classes); 781 } 782 klass = klass->GetSuperClass(); 783 } 784} 785 786void CompilerDriver::FindClinitImageClassesCallback(mirror::Object* object, void* arg) { 787 DCHECK(object != NULL); 788 DCHECK(arg != NULL); 789 CompilerDriver* compiler_driver = reinterpret_cast<CompilerDriver*>(arg); 790 MaybeAddToImageClasses(object->GetClass(), compiler_driver->image_classes_.get()); 791} 792 793void CompilerDriver::UpdateImageClasses(TimingLogger& timings) { 794 if (IsImage()) { 795 timings.NewSplit("UpdateImageClasses"); 796 797 // Update image_classes_ with classes for objects created by <clinit> methods. 798 Thread* self = Thread::Current(); 799 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter"); 800 gc::Heap* heap = Runtime::Current()->GetHeap(); 801 // TODO: Image spaces only? 802 ScopedObjectAccess soa(Thread::Current()); 803 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 804 heap->VisitObjects(FindClinitImageClassesCallback, this); 805 self->EndAssertNoThreadSuspension(old_cause); 806 } 807} 808 809bool CompilerDriver::CanAssumeTypeIsPresentInDexCache(const DexFile& dex_file, uint32_t type_idx) { 810 if (IsImage() && 811 IsImageClass(dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_))) { 812 if (kIsDebugBuild) { 813 ScopedObjectAccess soa(Thread::Current()); 814 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 815 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 816 CHECK(resolved_class != NULL); 817 } 818 stats_->TypeInDexCache(); 819 return true; 820 } else { 821 stats_->TypeNotInDexCache(); 822 return false; 823 } 824} 825 826bool CompilerDriver::CanAssumeStringIsPresentInDexCache(const DexFile& dex_file, 827 uint32_t string_idx) { 828 // See also Compiler::ResolveDexFile 829 830 bool result = false; 831 if (IsImage()) { 832 // We resolve all const-string strings when building for the image. 833 ScopedObjectAccess soa(Thread::Current()); 834 SirtRef<mirror::DexCache> dex_cache(soa.Self(), Runtime::Current()->GetClassLinker()->FindDexCache(dex_file)); 835 Runtime::Current()->GetClassLinker()->ResolveString(dex_file, string_idx, dex_cache); 836 result = true; 837 } 838 if (result) { 839 stats_->StringInDexCache(); 840 } else { 841 stats_->StringNotInDexCache(); 842 } 843 return result; 844} 845 846bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, const DexFile& dex_file, 847 uint32_t type_idx, 848 bool* type_known_final, bool* type_known_abstract, 849 bool* equals_referrers_class) { 850 if (type_known_final != NULL) { 851 *type_known_final = false; 852 } 853 if (type_known_abstract != NULL) { 854 *type_known_abstract = false; 855 } 856 if (equals_referrers_class != NULL) { 857 *equals_referrers_class = false; 858 } 859 ScopedObjectAccess soa(Thread::Current()); 860 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 861 // Get type from dex cache assuming it was populated by the verifier 862 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 863 if (resolved_class == NULL) { 864 stats_->TypeNeedsAccessCheck(); 865 return false; // Unknown class needs access checks. 866 } 867 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 868 if (equals_referrers_class != NULL) { 869 *equals_referrers_class = (method_id.class_idx_ == type_idx); 870 } 871 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 872 if (referrer_class == NULL) { 873 stats_->TypeNeedsAccessCheck(); 874 return false; // Incomplete referrer knowledge needs access check. 875 } 876 // Perform access check, will return true if access is ok or false if we're going to have to 877 // check this at runtime (for example for class loaders). 878 bool result = referrer_class->CanAccess(resolved_class); 879 if (result) { 880 stats_->TypeDoesntNeedAccessCheck(); 881 if (type_known_final != NULL) { 882 *type_known_final = resolved_class->IsFinal() && !resolved_class->IsArrayClass(); 883 } 884 if (type_known_abstract != NULL) { 885 *type_known_abstract = resolved_class->IsAbstract() && !resolved_class->IsArrayClass(); 886 } 887 } else { 888 stats_->TypeNeedsAccessCheck(); 889 } 890 return result; 891} 892 893bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 894 const DexFile& dex_file, 895 uint32_t type_idx) { 896 ScopedObjectAccess soa(Thread::Current()); 897 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 898 // Get type from dex cache assuming it was populated by the verifier. 899 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 900 if (resolved_class == NULL) { 901 stats_->TypeNeedsAccessCheck(); 902 return false; // Unknown class needs access checks. 903 } 904 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 905 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 906 if (referrer_class == NULL) { 907 stats_->TypeNeedsAccessCheck(); 908 return false; // Incomplete referrer knowledge needs access check. 909 } 910 // Perform access and instantiable checks, will return true if access is ok or false if we're 911 // going to have to check this at runtime (for example for class loaders). 912 bool result = referrer_class->CanAccess(resolved_class) && resolved_class->IsInstantiable(); 913 if (result) { 914 stats_->TypeDoesntNeedAccessCheck(); 915 } else { 916 stats_->TypeNeedsAccessCheck(); 917 } 918 return result; 919} 920 921bool CompilerDriver::CanEmbedTypeInCode(const DexFile& dex_file, uint32_t type_idx, 922 bool* is_type_initialized, bool* use_direct_type_ptr, 923 uintptr_t* direct_type_ptr) { 924 ScopedObjectAccess soa(Thread::Current()); 925 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 926 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 927 if (resolved_class == nullptr) { 928 return false; 929 } 930 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 931 if (compiling_boot) { 932 // boot -> boot class pointers. 933 // True if the class is in the image at boot compiling time. 934 const bool is_image_class = IsImage() && IsImageClass( 935 dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_)); 936 // True if pc relative load works. 937 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 938 if (is_image_class && support_boot_image_fixup) { 939 *is_type_initialized = resolved_class->IsInitialized(); 940 *use_direct_type_ptr = false; 941 *direct_type_ptr = 0; 942 return true; 943 } else { 944 return false; 945 } 946 } else { 947 // True if the class is in the image at app compiling time. 948 const bool class_in_image = 949 Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_class, false)->IsImageSpace(); 950 if (class_in_image) { 951 // boot -> app class pointers. 952 *is_type_initialized = resolved_class->IsInitialized(); 953 *use_direct_type_ptr = true; 954 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 955 return true; 956 } else { 957 // app -> app class pointers. 958 // Give up because app does not have an image and class 959 // isn't created at compile time. TODO: implement this 960 // if/when each app gets an image. 961 return false; 962 } 963 } 964} 965 966static mirror::Class* ComputeCompilingMethodsClass(ScopedObjectAccess& soa, 967 SirtRef<mirror::DexCache>& dex_cache, 968 const DexCompilationUnit* mUnit) 969 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 970 // The passed dex_cache is a hint, sanity check before asking the class linker that will take a 971 // lock. 972 if (dex_cache->GetDexFile() != mUnit->GetDexFile()) { 973 dex_cache.reset(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile())); 974 } 975 SirtRef<mirror::ClassLoader> 976 class_loader(soa.Self(), soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader())); 977 const DexFile::MethodId& referrer_method_id = 978 mUnit->GetDexFile()->GetMethodId(mUnit->GetDexMethodIndex()); 979 return mUnit->GetClassLinker()->ResolveType(*mUnit->GetDexFile(), referrer_method_id.class_idx_, 980 dex_cache, class_loader); 981} 982 983static mirror::ArtField* ComputeFieldReferencedFromCompilingMethod( 984 ScopedObjectAccess& soa, const DexCompilationUnit* mUnit, uint32_t field_idx, bool is_static) 985 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 986 SirtRef<mirror::DexCache> dex_cache(soa.Self(), mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile())); 987 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader())); 988 return mUnit->GetClassLinker()->ResolveField(*mUnit->GetDexFile(), field_idx, dex_cache, 989 class_loader, is_static); 990} 991 992static mirror::ArtMethod* ComputeMethodReferencedFromCompilingMethod(ScopedObjectAccess& soa, 993 const DexCompilationUnit* mUnit, 994 uint32_t method_idx, 995 InvokeType type) 996 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 997 SirtRef<mirror::DexCache> dex_cache(soa.Self(), mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile())); 998 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader())); 999 return mUnit->GetClassLinker()->ResolveMethod(*mUnit->GetDexFile(), method_idx, dex_cache, 1000 class_loader, NULL, type); 1001} 1002 1003bool CompilerDriver::ComputeSpecialAccessorInfo(uint32_t field_idx, bool is_put, 1004 verifier::MethodVerifier* verifier, 1005 InlineIGetIPutData* result) { 1006 mirror::DexCache* dex_cache = verifier->GetDexCache(); 1007 uint32_t method_idx = verifier->GetMethodReference().dex_method_index; 1008 mirror::ArtMethod* method = dex_cache->GetResolvedMethod(method_idx); 1009 mirror::ArtField* field = dex_cache->GetResolvedField(field_idx); 1010 if (method == nullptr || field == nullptr || field->IsStatic()) { 1011 return false; 1012 } 1013 mirror::Class* method_class = method->GetDeclaringClass(); 1014 mirror::Class* field_class = field->GetDeclaringClass(); 1015 if (!method_class->CanAccessResolvedField(field_class, field, dex_cache, field_idx) || 1016 (is_put && field->IsFinal() && method_class != field_class)) { 1017 return false; 1018 } 1019 DCHECK_GE(field->GetOffset().Int32Value(), 0); 1020 result->field_idx = field_idx; 1021 result->field_offset = field->GetOffset().Int32Value(); 1022 result->is_volatile = field->IsVolatile(); 1023 return true; 1024} 1025 1026bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1027 bool is_put, int* field_offset, bool* is_volatile) { 1028 ScopedObjectAccess soa(Thread::Current()); 1029 // Conservative defaults. 1030 *field_offset = -1; 1031 *is_volatile = true; 1032 // Try to resolve field and ignore if an Incompatible Class Change Error (ie is static). 1033 mirror::ArtField* resolved_field = 1034 ComputeFieldReferencedFromCompilingMethod(soa, mUnit, field_idx, false); 1035 if (resolved_field != NULL && !resolved_field->IsStatic()) { 1036 SirtRef<mirror::DexCache> dex_cache(soa.Self(), 1037 resolved_field->GetDeclaringClass()->GetDexCache()); 1038 mirror::Class* referrer_class = 1039 ComputeCompilingMethodsClass(soa, dex_cache, mUnit); 1040 if (referrer_class != NULL) { 1041 mirror::Class* fields_class = resolved_field->GetDeclaringClass(); 1042 bool access_ok = referrer_class->CanAccessResolvedField(fields_class, resolved_field, 1043 dex_cache.get(), field_idx); 1044 bool is_write_to_final_from_wrong_class = is_put && resolved_field->IsFinal() && 1045 fields_class != referrer_class; 1046 if (access_ok && !is_write_to_final_from_wrong_class) { 1047 *field_offset = resolved_field->GetOffset().Int32Value(); 1048 *is_volatile = resolved_field->IsVolatile(); 1049 stats_->ResolvedInstanceField(); 1050 return true; // Fast path. 1051 } 1052 } 1053 } 1054 // Clean up any exception left by field/type resolution 1055 if (soa.Self()->IsExceptionPending()) { 1056 soa.Self()->ClearException(); 1057 } 1058 stats_->UnresolvedInstanceField(); 1059 return false; // Incomplete knowledge needs slow path. 1060} 1061 1062bool CompilerDriver::ComputeStaticFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1063 bool is_put, int* field_offset, int* storage_index, 1064 bool* is_referrers_class, bool* is_volatile, 1065 bool* is_initialized) { 1066 ScopedObjectAccess soa(Thread::Current()); 1067 // Conservative defaults. 1068 *field_offset = -1; 1069 *storage_index = -1; 1070 *is_referrers_class = false; 1071 *is_volatile = true; 1072 *is_initialized = false; 1073 // Try to resolve field and ignore if an Incompatible Class Change Error (ie isn't static). 1074 mirror::ArtField* resolved_field = 1075 ComputeFieldReferencedFromCompilingMethod(soa, mUnit, field_idx, true); 1076 if (resolved_field != NULL && resolved_field->IsStatic()) { 1077 SirtRef<mirror::DexCache> dex_cache(soa.Self(), resolved_field->GetDeclaringClass()->GetDexCache()); 1078 mirror::Class* referrer_class = 1079 ComputeCompilingMethodsClass(soa, dex_cache, mUnit); 1080 if (referrer_class != NULL) { 1081 mirror::Class* fields_class = resolved_field->GetDeclaringClass(); 1082 if (fields_class == referrer_class) { 1083 *is_referrers_class = true; // implies no worrying about class initialization 1084 *is_initialized = true; 1085 *field_offset = resolved_field->GetOffset().Int32Value(); 1086 *is_volatile = resolved_field->IsVolatile(); 1087 stats_->ResolvedLocalStaticField(); 1088 return true; // fast path 1089 } else { 1090 bool access_ok = referrer_class->CanAccessResolvedField(fields_class, resolved_field, 1091 dex_cache.get(), field_idx); 1092 bool is_write_to_final_from_wrong_class = is_put && resolved_field->IsFinal(); 1093 if (access_ok && !is_write_to_final_from_wrong_class) { 1094 // We have the resolved field, we must make it into a index for the referrer 1095 // in its static storage (which may fail if it doesn't have a slot for it) 1096 // TODO: for images we can elide the static storage base null check 1097 // if we know there's a non-null entry in the image 1098 mirror::DexCache* dex_cache = mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()); 1099 if (fields_class->GetDexCache() == dex_cache) { 1100 // common case where the dex cache of both the referrer and the field are the same, 1101 // no need to search the dex file 1102 *storage_index = fields_class->GetDexTypeIndex(); 1103 *field_offset = resolved_field->GetOffset().Int32Value(); 1104 *is_volatile = resolved_field->IsVolatile(); 1105 *is_initialized = fields_class->IsInitialized() && 1106 CanAssumeTypeIsPresentInDexCache(*mUnit->GetDexFile(), *storage_index); 1107 stats_->ResolvedStaticField(); 1108 return true; 1109 } 1110 // Search dex file for localized ssb index, may fail if field's class is a parent 1111 // of the class mentioned in the dex file and there is no dex cache entry. 1112 const DexFile::StringId* string_id = 1113 mUnit->GetDexFile()->FindStringId(FieldHelper(resolved_field).GetDeclaringClassDescriptor()); 1114 if (string_id != NULL) { 1115 const DexFile::TypeId* type_id = 1116 mUnit->GetDexFile()->FindTypeId(mUnit->GetDexFile()->GetIndexForStringId(*string_id)); 1117 if (type_id != NULL) { 1118 // medium path, needs check of static storage base being initialized 1119 *storage_index = mUnit->GetDexFile()->GetIndexForTypeId(*type_id); 1120 *field_offset = resolved_field->GetOffset().Int32Value(); 1121 *is_volatile = resolved_field->IsVolatile(); 1122 *is_initialized = fields_class->IsInitialized() && 1123 CanAssumeTypeIsPresentInDexCache(*mUnit->GetDexFile(), *storage_index); 1124 stats_->ResolvedStaticField(); 1125 return true; 1126 } 1127 } 1128 } 1129 } 1130 } 1131 } 1132 // Clean up any exception left by field/type resolution 1133 if (soa.Self()->IsExceptionPending()) { 1134 soa.Self()->ClearException(); 1135 } 1136 stats_->UnresolvedStaticField(); 1137 return false; // Incomplete knowledge needs slow path. 1138} 1139 1140void CompilerDriver::GetCodeAndMethodForDirectCall(InvokeType* type, InvokeType sharp_type, 1141 bool no_guarantee_of_dex_cache_entry, 1142 mirror::Class* referrer_class, 1143 mirror::ArtMethod* method, 1144 bool update_stats, 1145 MethodReference* target_method, 1146 uintptr_t* direct_code, 1147 uintptr_t* direct_method) { 1148 // For direct and static methods compute possible direct_code and direct_method values, ie 1149 // an address for the Method* being invoked and an address of the code for that Method*. 1150 // For interface calls compute a value for direct_method that is the interface method being 1151 // invoked, so this can be passed to the out-of-line runtime support code. 1152 *direct_code = 0; 1153 *direct_method = 0; 1154 bool use_dex_cache = false; 1155 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 1156 if (compiler_backend_ == kPortable) { 1157 if (sharp_type != kStatic && sharp_type != kDirect) { 1158 return; 1159 } 1160 use_dex_cache = true; 1161 } else { 1162 if (sharp_type != kStatic && sharp_type != kDirect) { 1163 return; 1164 } 1165 // TODO: support patching on all architectures. 1166 use_dex_cache = compiling_boot && !support_boot_image_fixup_; 1167 } 1168 bool method_code_in_boot = (method->GetDeclaringClass()->GetClassLoader() == nullptr); 1169 if (!use_dex_cache) { 1170 if (!method_code_in_boot) { 1171 use_dex_cache = true; 1172 } else { 1173 bool has_clinit_trampoline = 1174 method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); 1175 if (has_clinit_trampoline && (method->GetDeclaringClass() != referrer_class)) { 1176 // Ensure we run the clinit trampoline unless we are invoking a static method in the same 1177 // class. 1178 use_dex_cache = true; 1179 } 1180 } 1181 } 1182 if (update_stats && method_code_in_boot) { 1183 stats_->DirectCallsToBoot(*type); 1184 stats_->DirectMethodsToBoot(*type); 1185 } 1186 if (!use_dex_cache && compiling_boot) { 1187 MethodHelper mh(method); 1188 if (!IsImageClass(mh.GetDeclaringClassDescriptor())) { 1189 // We can only branch directly to Methods that are resolved in the DexCache. 1190 // Otherwise we won't invoke the resolution trampoline. 1191 use_dex_cache = true; 1192 } 1193 } 1194 // The method is defined not within this dex file. We need a dex cache slot within the current 1195 // dex file or direct pointers. 1196 bool must_use_direct_pointers = false; 1197 if (target_method->dex_file == method->GetDeclaringClass()->GetDexCache()->GetDexFile()) { 1198 target_method->dex_method_index = method->GetDexMethodIndex(); 1199 } else { 1200 // TODO: support patching from one dex file to another in the boot image. 1201 use_dex_cache = use_dex_cache || compiling_boot; 1202 if (no_guarantee_of_dex_cache_entry) { 1203 // See if the method is also declared in this dex cache. 1204 uint32_t dex_method_idx = MethodHelper(method).FindDexMethodIndexInOtherDexFile( 1205 *target_method->dex_file, target_method->dex_method_index); 1206 if (dex_method_idx != DexFile::kDexNoIndex) { 1207 target_method->dex_method_index = dex_method_idx; 1208 } else { 1209 must_use_direct_pointers = true; 1210 } 1211 } 1212 } 1213 if (use_dex_cache) { 1214 if (must_use_direct_pointers) { 1215 // Fail. Test above showed the only safe dispatch was via the dex cache, however, the direct 1216 // pointers are required as the dex cache lacks an appropriate entry. 1217 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1218 } else { 1219 *type = sharp_type; 1220 } 1221 } else { 1222 if (compiling_boot) { 1223 *type = sharp_type; 1224 *direct_method = -1; 1225 *direct_code = -1; 1226 } else { 1227 bool method_in_image = 1228 Runtime::Current()->GetHeap()->FindSpaceFromObject(method, false)->IsImageSpace(); 1229 if (method_in_image) { 1230 CHECK(!method->IsAbstract()); 1231 *type = sharp_type; 1232 *direct_method = reinterpret_cast<uintptr_t>(method); 1233 if (compiler_backend_ == kQuick) { 1234 *direct_code = reinterpret_cast<uintptr_t>(method->GetEntryPointFromQuickCompiledCode()); 1235 } else { 1236 CHECK_EQ(compiler_backend_, kPortable); 1237 *direct_code = reinterpret_cast<uintptr_t>(method->GetEntryPointFromPortableCompiledCode()); 1238 } 1239 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1240 target_method->dex_method_index = method->GetDexMethodIndex(); 1241 } else if (!must_use_direct_pointers) { 1242 // Set the code and rely on the dex cache for the method. 1243 *type = sharp_type; 1244 if (compiler_backend_ == kQuick) { 1245 *direct_code = reinterpret_cast<uintptr_t>(method->GetEntryPointFromQuickCompiledCode()); 1246 } else { 1247 CHECK_EQ(compiler_backend_, kPortable); 1248 *direct_code = reinterpret_cast<uintptr_t>(method->GetEntryPointFromPortableCompiledCode()); 1249 } 1250 } else { 1251 // Direct pointers were required but none were available. 1252 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1253 } 1254 } 1255 } 1256} 1257 1258bool CompilerDriver::ComputeInvokeInfo(const DexCompilationUnit* mUnit, const uint32_t dex_pc, 1259 bool update_stats, bool enable_devirtualization, 1260 InvokeType* invoke_type, MethodReference* target_method, 1261 int* vtable_idx, uintptr_t* direct_code, 1262 uintptr_t* direct_method) { 1263 ScopedObjectAccess soa(Thread::Current()); 1264 *vtable_idx = -1; 1265 *direct_code = 0; 1266 *direct_method = 0; 1267 mirror::ArtMethod* resolved_method = 1268 ComputeMethodReferencedFromCompilingMethod(soa, mUnit, target_method->dex_method_index, 1269 *invoke_type); 1270 if (resolved_method != NULL) { 1271 if (*invoke_type == kVirtual || *invoke_type == kSuper) { 1272 *vtable_idx = resolved_method->GetMethodIndex(); 1273 } else if (*invoke_type == kInterface) { 1274 *vtable_idx = resolved_method->GetDexMethodIndex(); 1275 } 1276 // Don't try to fast-path if we don't understand the caller's class or this appears to be an 1277 // Incompatible Class Change Error. 1278 SirtRef<mirror::DexCache> dex_cache(soa.Self(), resolved_method->GetDeclaringClass()->GetDexCache()); 1279 mirror::Class* referrer_class = 1280 ComputeCompilingMethodsClass(soa, dex_cache, mUnit); 1281 bool icce = resolved_method->CheckIncompatibleClassChange(*invoke_type); 1282 if (referrer_class != NULL && !icce) { 1283 mirror::Class* methods_class = resolved_method->GetDeclaringClass(); 1284 if (referrer_class->CanAccessResolvedMethod(methods_class, resolved_method, dex_cache.get(), 1285 target_method->dex_method_index)) { 1286 const bool enableFinalBasedSharpening = enable_devirtualization; 1287 // Sharpen a virtual call into a direct call when the target is known not to have been 1288 // overridden (ie is final). 1289 bool can_sharpen_virtual_based_on_type = 1290 (*invoke_type == kVirtual) && (resolved_method->IsFinal() || methods_class->IsFinal()); 1291 // For invoke-super, ensure the vtable index will be correct to dispatch in the vtable of 1292 // the super class. 1293 bool can_sharpen_super_based_on_type = (*invoke_type == kSuper) && 1294 (referrer_class != methods_class) && referrer_class->IsSubClass(methods_class) && 1295 resolved_method->GetMethodIndex() < methods_class->GetVTable()->GetLength() && 1296 (methods_class->GetVTable()->Get(resolved_method->GetMethodIndex()) == resolved_method); 1297 1298 if (enableFinalBasedSharpening && (can_sharpen_virtual_based_on_type || 1299 can_sharpen_super_based_on_type)) { 1300 // Sharpen a virtual call into a direct call. The method_idx is into the DexCache 1301 // associated with target_method->dex_file. 1302 CHECK(target_method->dex_file == mUnit->GetDexFile()); 1303 DCHECK(dex_cache.get() == mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile())); 1304 CHECK(dex_cache->GetResolvedMethod(target_method->dex_method_index) == 1305 resolved_method) << PrettyMethod(resolved_method); 1306 InvokeType orig_invoke_type = *invoke_type; 1307 GetCodeAndMethodForDirectCall(invoke_type, kDirect, false, referrer_class, resolved_method, 1308 update_stats, target_method, direct_code, direct_method); 1309 if (update_stats && (*invoke_type == kDirect)) { 1310 stats_->ResolvedMethod(orig_invoke_type); 1311 stats_->VirtualMadeDirect(orig_invoke_type); 1312 } 1313 DCHECK_NE(*invoke_type, kSuper) << PrettyMethod(resolved_method); 1314 return true; 1315 } 1316 const bool enableVerifierBasedSharpening = enable_devirtualization; 1317 if (enableVerifierBasedSharpening && (*invoke_type == kVirtual || 1318 *invoke_type == kInterface)) { 1319 // Did the verifier record a more precise invoke target based on its type information? 1320 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1321 const MethodReference* devirt_map_target = 1322 mUnit->GetVerifiedMethod()->GetDevirtTarget(dex_pc); 1323 if (devirt_map_target != NULL) { 1324 SirtRef<mirror::DexCache> target_dex_cache(soa.Self(), mUnit->GetClassLinker()->FindDexCache(*devirt_map_target->dex_file)); 1325 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader())); 1326 mirror::ArtMethod* called_method = 1327 mUnit->GetClassLinker()->ResolveMethod(*devirt_map_target->dex_file, 1328 devirt_map_target->dex_method_index, 1329 target_dex_cache, class_loader, NULL, 1330 kVirtual); 1331 CHECK(called_method != NULL); 1332 CHECK(!called_method->IsAbstract()); 1333 InvokeType orig_invoke_type = *invoke_type; 1334 GetCodeAndMethodForDirectCall(invoke_type, kDirect, true, referrer_class, called_method, 1335 update_stats, target_method, direct_code, direct_method); 1336 if (update_stats && (*invoke_type == kDirect)) { 1337 stats_->ResolvedMethod(orig_invoke_type); 1338 stats_->VirtualMadeDirect(orig_invoke_type); 1339 stats_->PreciseTypeDevirtualization(); 1340 } 1341 DCHECK_NE(*invoke_type, kSuper); 1342 return true; 1343 } 1344 } 1345 if (*invoke_type == kSuper) { 1346 // Unsharpened super calls are suspicious so go slow-path. 1347 } else { 1348 // Sharpening failed so generate a regular resolved method dispatch. 1349 if (update_stats) { 1350 stats_->ResolvedMethod(*invoke_type); 1351 } 1352 GetCodeAndMethodForDirectCall(invoke_type, *invoke_type, false, referrer_class, resolved_method, 1353 update_stats, target_method, direct_code, direct_method); 1354 return true; 1355 } 1356 } 1357 } 1358 } 1359 // Clean up any exception left by method/invoke_type resolution 1360 if (soa.Self()->IsExceptionPending()) { 1361 soa.Self()->ClearException(); 1362 } 1363 if (update_stats) { 1364 stats_->UnresolvedMethod(*invoke_type); 1365 } 1366 return false; // Incomplete knowledge needs slow path. 1367} 1368 1369const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1370 uint32_t method_idx) const { 1371 MethodReference ref(dex_file, method_idx); 1372 return verification_results_->GetVerifiedMethod(ref); 1373} 1374 1375bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1376 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1377 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1378 if (result) { 1379 stats_->SafeCast(); 1380 } else { 1381 stats_->NotASafeCast(); 1382 } 1383 return result; 1384} 1385 1386 1387void CompilerDriver::AddCodePatch(const DexFile* dex_file, 1388 uint16_t referrer_class_def_idx, 1389 uint32_t referrer_method_idx, 1390 InvokeType referrer_invoke_type, 1391 uint32_t target_method_idx, 1392 InvokeType target_invoke_type, 1393 size_t literal_offset) { 1394 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1395 code_to_patch_.push_back(new CallPatchInformation(dex_file, 1396 referrer_class_def_idx, 1397 referrer_method_idx, 1398 referrer_invoke_type, 1399 target_method_idx, 1400 target_invoke_type, 1401 literal_offset)); 1402} 1403void CompilerDriver::AddRelativeCodePatch(const DexFile* dex_file, 1404 uint16_t referrer_class_def_idx, 1405 uint32_t referrer_method_idx, 1406 InvokeType referrer_invoke_type, 1407 uint32_t target_method_idx, 1408 InvokeType target_invoke_type, 1409 size_t literal_offset, 1410 int32_t pc_relative_offset) { 1411 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1412 code_to_patch_.push_back(new RelativeCallPatchInformation(dex_file, 1413 referrer_class_def_idx, 1414 referrer_method_idx, 1415 referrer_invoke_type, 1416 target_method_idx, 1417 target_invoke_type, 1418 literal_offset, 1419 pc_relative_offset)); 1420} 1421void CompilerDriver::AddMethodPatch(const DexFile* dex_file, 1422 uint16_t referrer_class_def_idx, 1423 uint32_t referrer_method_idx, 1424 InvokeType referrer_invoke_type, 1425 uint32_t target_method_idx, 1426 InvokeType target_invoke_type, 1427 size_t literal_offset) { 1428 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1429 methods_to_patch_.push_back(new CallPatchInformation(dex_file, 1430 referrer_class_def_idx, 1431 referrer_method_idx, 1432 referrer_invoke_type, 1433 target_method_idx, 1434 target_invoke_type, 1435 literal_offset)); 1436} 1437void CompilerDriver::AddClassPatch(const DexFile* dex_file, 1438 uint16_t referrer_class_def_idx, 1439 uint32_t referrer_method_idx, 1440 uint32_t target_type_idx, 1441 size_t literal_offset) { 1442 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1443 classes_to_patch_.push_back(new TypePatchInformation(dex_file, 1444 referrer_class_def_idx, 1445 referrer_method_idx, 1446 target_type_idx, 1447 literal_offset)); 1448} 1449 1450class ParallelCompilationManager { 1451 public: 1452 typedef void Callback(const ParallelCompilationManager* manager, size_t index); 1453 1454 ParallelCompilationManager(ClassLinker* class_linker, 1455 jobject class_loader, 1456 CompilerDriver* compiler, 1457 const DexFile* dex_file, 1458 ThreadPool& thread_pool) 1459 : index_(0), 1460 class_linker_(class_linker), 1461 class_loader_(class_loader), 1462 compiler_(compiler), 1463 dex_file_(dex_file), 1464 thread_pool_(&thread_pool) {} 1465 1466 ClassLinker* GetClassLinker() const { 1467 CHECK(class_linker_ != NULL); 1468 return class_linker_; 1469 } 1470 1471 jobject GetClassLoader() const { 1472 return class_loader_; 1473 } 1474 1475 CompilerDriver* GetCompiler() const { 1476 CHECK(compiler_ != NULL); 1477 return compiler_; 1478 } 1479 1480 const DexFile* GetDexFile() const { 1481 CHECK(dex_file_ != NULL); 1482 return dex_file_; 1483 } 1484 1485 void ForAll(size_t begin, size_t end, Callback callback, size_t work_units) { 1486 Thread* self = Thread::Current(); 1487 self->AssertNoPendingException(); 1488 CHECK_GT(work_units, 0U); 1489 1490 index_ = begin; 1491 for (size_t i = 0; i < work_units; ++i) { 1492 thread_pool_->AddTask(self, new ForAllClosure(this, end, callback)); 1493 } 1494 thread_pool_->StartWorkers(self); 1495 1496 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1497 // thread destructor's called below perform join). 1498 CHECK_NE(self->GetState(), kRunnable); 1499 1500 // Wait for all the worker threads to finish. 1501 thread_pool_->Wait(self, true, false); 1502 } 1503 1504 size_t NextIndex() { 1505 return index_.FetchAndAdd(1); 1506 } 1507 1508 private: 1509 class ForAllClosure : public Task { 1510 public: 1511 ForAllClosure(ParallelCompilationManager* manager, size_t end, Callback* callback) 1512 : manager_(manager), 1513 end_(end), 1514 callback_(callback) {} 1515 1516 virtual void Run(Thread* self) { 1517 while (true) { 1518 const size_t index = manager_->NextIndex(); 1519 if (UNLIKELY(index >= end_)) { 1520 break; 1521 } 1522 callback_(manager_, index); 1523 self->AssertNoPendingException(); 1524 } 1525 } 1526 1527 virtual void Finalize() { 1528 delete this; 1529 } 1530 1531 private: 1532 ParallelCompilationManager* const manager_; 1533 const size_t end_; 1534 Callback* const callback_; 1535 }; 1536 1537 AtomicInteger index_; 1538 ClassLinker* const class_linker_; 1539 const jobject class_loader_; 1540 CompilerDriver* const compiler_; 1541 const DexFile* const dex_file_; 1542 ThreadPool* const thread_pool_; 1543 1544 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1545}; 1546 1547// Return true if the class should be skipped during compilation. 1548// 1549// The first case where we skip is for redundant class definitions in 1550// the boot classpath. We skip all but the first definition in that case. 1551// 1552// The second case where we skip is when an app bundles classes found 1553// in the boot classpath. Since at runtime we will select the class from 1554// the boot classpath, we ignore the one from the app. 1555static bool SkipClass(ClassLinker* class_linker, jobject class_loader, const DexFile& dex_file, 1556 const DexFile::ClassDef& class_def) { 1557 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1558 if (class_loader == NULL) { 1559 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, class_linker->GetBootClassPath()); 1560 CHECK(pair.second != NULL); 1561 if (pair.first != &dex_file) { 1562 LOG(WARNING) << "Skipping class " << descriptor << " from " << dex_file.GetLocation() 1563 << " previously found in " << pair.first->GetLocation(); 1564 return true; 1565 } 1566 return false; 1567 } 1568 return class_linker->IsInBootClassPath(descriptor); 1569} 1570 1571// A fast version of SkipClass above if the class pointer is available 1572// that avoids the expensive FindInClassPath search. 1573static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1574 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1575 DCHECK(klass != NULL); 1576 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1577 if (&dex_file != &original_dex_file) { 1578 if (class_loader == NULL) { 1579 LOG(WARNING) << "Skipping class " << PrettyDescriptor(klass) << " from " 1580 << dex_file.GetLocation() << " previously found in " 1581 << original_dex_file.GetLocation(); 1582 } 1583 return true; 1584 } 1585 return false; 1586} 1587 1588static void ResolveClassFieldsAndMethods(const ParallelCompilationManager* manager, 1589 size_t class_def_index) 1590 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1591 ATRACE_CALL(); 1592 Thread* self = Thread::Current(); 1593 jobject jclass_loader = manager->GetClassLoader(); 1594 const DexFile& dex_file = *manager->GetDexFile(); 1595 ClassLinker* class_linker = manager->GetClassLinker(); 1596 1597 // If an instance field is final then we need to have a barrier on the return, static final 1598 // fields are assigned within the lock held for class initialization. Conservatively assume 1599 // constructor barriers are always required. 1600 bool requires_constructor_barrier = true; 1601 1602 // Method and Field are the worst. We can't resolve without either 1603 // context from the code use (to disambiguate virtual vs direct 1604 // method and instance vs static field) or from class 1605 // definitions. While the compiler will resolve what it can as it 1606 // needs it, here we try to resolve fields and methods used in class 1607 // definitions, since many of them many never be referenced by 1608 // generated code. 1609 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1610 if (!SkipClass(class_linker, jclass_loader, dex_file, class_def)) { 1611 ScopedObjectAccess soa(self); 1612 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), soa.Decode<mirror::ClassLoader*>(jclass_loader)); 1613 SirtRef<mirror::DexCache> dex_cache(soa.Self(), class_linker->FindDexCache(dex_file)); 1614 // Resolve the class. 1615 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1616 class_loader); 1617 bool resolve_fields_and_methods; 1618 if (klass == NULL) { 1619 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1620 // attempt to resolve methods and fields when there is no declaring class. 1621 CHECK(soa.Self()->IsExceptionPending()); 1622 soa.Self()->ClearException(); 1623 resolve_fields_and_methods = false; 1624 } else { 1625 resolve_fields_and_methods = manager->GetCompiler()->IsImage(); 1626 } 1627 // Note the class_data pointer advances through the headers, 1628 // static fields, instance fields, direct methods, and virtual 1629 // methods. 1630 const byte* class_data = dex_file.GetClassData(class_def); 1631 if (class_data == NULL) { 1632 // Empty class such as a marker interface. 1633 requires_constructor_barrier = false; 1634 } else { 1635 ClassDataItemIterator it(dex_file, class_data); 1636 while (it.HasNextStaticField()) { 1637 if (resolve_fields_and_methods) { 1638 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1639 dex_cache, class_loader, true); 1640 if (field == NULL) { 1641 CHECK(soa.Self()->IsExceptionPending()); 1642 soa.Self()->ClearException(); 1643 } 1644 } 1645 it.Next(); 1646 } 1647 // We require a constructor barrier if there are final instance fields. 1648 requires_constructor_barrier = false; 1649 while (it.HasNextInstanceField()) { 1650 if ((it.GetMemberAccessFlags() & kAccFinal) != 0) { 1651 requires_constructor_barrier = true; 1652 } 1653 if (resolve_fields_and_methods) { 1654 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1655 dex_cache, class_loader, false); 1656 if (field == NULL) { 1657 CHECK(soa.Self()->IsExceptionPending()); 1658 soa.Self()->ClearException(); 1659 } 1660 } 1661 it.Next(); 1662 } 1663 if (resolve_fields_and_methods) { 1664 while (it.HasNextDirectMethod()) { 1665 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1666 dex_cache, class_loader, NULL, 1667 it.GetMethodInvokeType(class_def)); 1668 if (method == NULL) { 1669 CHECK(soa.Self()->IsExceptionPending()); 1670 soa.Self()->ClearException(); 1671 } 1672 it.Next(); 1673 } 1674 while (it.HasNextVirtualMethod()) { 1675 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1676 dex_cache, class_loader, NULL, 1677 it.GetMethodInvokeType(class_def)); 1678 if (method == NULL) { 1679 CHECK(soa.Self()->IsExceptionPending()); 1680 soa.Self()->ClearException(); 1681 } 1682 it.Next(); 1683 } 1684 DCHECK(!it.HasNext()); 1685 } 1686 } 1687 } 1688 if (requires_constructor_barrier) { 1689 manager->GetCompiler()->AddRequiresConstructorBarrier(self, &dex_file, class_def_index); 1690 } 1691} 1692 1693static void ResolveType(const ParallelCompilationManager* manager, size_t type_idx) 1694 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1695 // Class derived values are more complicated, they require the linker and loader. 1696 ScopedObjectAccess soa(Thread::Current()); 1697 ClassLinker* class_linker = manager->GetClassLinker(); 1698 const DexFile& dex_file = *manager->GetDexFile(); 1699 SirtRef<mirror::DexCache> dex_cache(soa.Self(), class_linker->FindDexCache(dex_file)); 1700 SirtRef<mirror::ClassLoader> class_loader( 1701 soa.Self(), soa.Decode<mirror::ClassLoader*>(manager->GetClassLoader())); 1702 mirror::Class* klass = class_linker->ResolveType(dex_file, type_idx, dex_cache, class_loader); 1703 1704 if (klass == NULL) { 1705 CHECK(soa.Self()->IsExceptionPending()); 1706 mirror::Throwable* exception = soa.Self()->GetException(NULL); 1707 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1708 if (strcmp("Ljava/lang/OutOfMemoryError;", 1709 ClassHelper(exception->GetClass()).GetDescriptor()) == 0) { 1710 // There's little point continuing compilation if the heap is exhausted. 1711 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1712 } 1713 soa.Self()->ClearException(); 1714 } 1715} 1716 1717void CompilerDriver::ResolveDexFile(jobject class_loader, const DexFile& dex_file, 1718 ThreadPool& thread_pool, TimingLogger& timings) { 1719 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1720 1721 // TODO: we could resolve strings here, although the string table is largely filled with class 1722 // and method names. 1723 1724 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, thread_pool); 1725 if (IsImage()) { 1726 // For images we resolve all types, such as array, whereas for applications just those with 1727 // classdefs are resolved by ResolveClassFieldsAndMethods. 1728 timings.NewSplit("Resolve Types"); 1729 context.ForAll(0, dex_file.NumTypeIds(), ResolveType, thread_count_); 1730 } 1731 1732 timings.NewSplit("Resolve MethodsAndFields"); 1733 context.ForAll(0, dex_file.NumClassDefs(), ResolveClassFieldsAndMethods, thread_count_); 1734} 1735 1736void CompilerDriver::Verify(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1737 ThreadPool& thread_pool, TimingLogger& timings) { 1738 for (size_t i = 0; i != dex_files.size(); ++i) { 1739 const DexFile* dex_file = dex_files[i]; 1740 CHECK(dex_file != NULL); 1741 VerifyDexFile(class_loader, *dex_file, thread_pool, timings); 1742 } 1743} 1744 1745static void VerifyClass(const ParallelCompilationManager* manager, size_t class_def_index) 1746 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1747 ATRACE_CALL(); 1748 ScopedObjectAccess soa(Thread::Current()); 1749 const DexFile& dex_file = *manager->GetDexFile(); 1750 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1751 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1752 ClassLinker* class_linker = manager->GetClassLinker(); 1753 jobject jclass_loader = manager->GetClassLoader(); 1754 SirtRef<mirror::ClassLoader> class_loader( 1755 soa.Self(), soa.Decode<mirror::ClassLoader*>(jclass_loader)); 1756 SirtRef<mirror::Class> klass(soa.Self(), class_linker->FindClass(descriptor, class_loader)); 1757 if (klass.get() == nullptr) { 1758 CHECK(soa.Self()->IsExceptionPending()); 1759 soa.Self()->ClearException(); 1760 1761 /* 1762 * At compile time, we can still structurally verify the class even if FindClass fails. 1763 * This is to ensure the class is structurally sound for compilation. An unsound class 1764 * will be rejected by the verifier and later skipped during compilation in the compiler. 1765 */ 1766 SirtRef<mirror::DexCache> dex_cache(soa.Self(), class_linker->FindDexCache(dex_file)); 1767 std::string error_msg; 1768 if (verifier::MethodVerifier::VerifyClass(&dex_file, dex_cache, class_loader, &class_def, true, 1769 &error_msg) == 1770 verifier::MethodVerifier::kHardFailure) { 1771 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 1772 << " because: " << error_msg; 1773 } 1774 } else if (!SkipClass(jclass_loader, dex_file, klass.get())) { 1775 CHECK(klass->IsResolved()) << PrettyClass(klass.get()); 1776 class_linker->VerifyClass(klass); 1777 1778 if (klass->IsErroneous()) { 1779 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 1780 CHECK(soa.Self()->IsExceptionPending()); 1781 soa.Self()->ClearException(); 1782 } 1783 1784 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 1785 << PrettyDescriptor(klass.get()) << ": state=" << klass->GetStatus(); 1786 } 1787 soa.Self()->AssertNoPendingException(); 1788} 1789 1790void CompilerDriver::VerifyDexFile(jobject class_loader, const DexFile& dex_file, 1791 ThreadPool& thread_pool, TimingLogger& timings) { 1792 timings.NewSplit("Verify Dex File"); 1793 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1794 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, thread_pool); 1795 context.ForAll(0, dex_file.NumClassDefs(), VerifyClass, thread_count_); 1796} 1797 1798static void InitializeClass(const ParallelCompilationManager* manager, size_t class_def_index) 1799 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1800 ATRACE_CALL(); 1801 jobject jclass_loader = manager->GetClassLoader(); 1802 const DexFile& dex_file = *manager->GetDexFile(); 1803 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1804 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 1805 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 1806 1807 ScopedObjectAccess soa(Thread::Current()); 1808 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), 1809 soa.Decode<mirror::ClassLoader*>(jclass_loader)); 1810 SirtRef<mirror::Class> klass(soa.Self(), 1811 manager->GetClassLinker()->FindClass(descriptor, class_loader)); 1812 1813 if (klass.get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.get())) { 1814 // Only try to initialize classes that were successfully verified. 1815 if (klass->IsVerified()) { 1816 // Attempt to initialize the class but bail if we either need to initialize the super-class 1817 // or static fields. 1818 manager->GetClassLinker()->EnsureInitialized(klass, false, false); 1819 if (!klass->IsInitialized()) { 1820 // We don't want non-trivial class initialization occurring on multiple threads due to 1821 // deadlock problems. For example, a parent class is initialized (holding its lock) that 1822 // refers to a sub-class in its static/class initializer causing it to try to acquire the 1823 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 1824 // after first initializing its parents, whose locks are acquired. This leads to a 1825 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 1826 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 1827 // than use a special Object for the purpose we use the Class of java.lang.Class. 1828 SirtRef<mirror::Class> sirt_klass(soa.Self(), klass->GetClass()); 1829 ObjectLock<mirror::Class> lock(soa.Self(), &sirt_klass); 1830 // Attempt to initialize allowing initialization of parent classes but still not static 1831 // fields. 1832 manager->GetClassLinker()->EnsureInitialized(klass, false, true); 1833 if (!klass->IsInitialized()) { 1834 // We need to initialize static fields, we only do this for image classes that aren't 1835 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 1836 bool can_init_static_fields = manager->GetCompiler()->IsImage() && 1837 manager->GetCompiler()->IsImageClass(descriptor) && 1838 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 1839 if (can_init_static_fields) { 1840 VLOG(compiler) << "Initializing: " << descriptor; 1841 if (strcmp("Ljava/lang/Void;", descriptor) == 0) { 1842 // Hand initialize j.l.Void to avoid Dex file operations in un-started runtime. 1843 ObjectLock<mirror::Class> lock(soa.Self(), &klass); 1844 mirror::ObjectArray<mirror::ArtField>* fields = klass->GetSFields(); 1845 CHECK_EQ(fields->GetLength(), 1); 1846 fields->Get(0)->SetObj<false>(klass.get(), 1847 manager->GetClassLinker()->FindPrimitiveClass('V')); 1848 klass->SetStatus(mirror::Class::kStatusInitialized, soa.Self()); 1849 } else { 1850 // TODO multithreading support. We should ensure the current compilation thread has 1851 // exclusive access to the runtime and the transaction. To achieve this, we could use 1852 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 1853 // checks in Thread::AssertThreadSuspensionIsAllowable. 1854 Runtime* const runtime = Runtime::Current(); 1855 Transaction transaction; 1856 1857 // Run the class initializer in transaction mode. 1858 runtime->EnterTransactionMode(&transaction); 1859 const mirror::Class::Status old_status = klass->GetStatus(); 1860 bool success = manager->GetClassLinker()->EnsureInitialized(klass, true, true); 1861 // TODO we detach transaction from runtime to indicate we quit the transactional 1862 // mode which prevents the GC from visiting objects modified during the transaction. 1863 // Ensure GC is not run so don't access freed objects when aborting transaction. 1864 const char* old_casue = soa.Self()->StartAssertNoThreadSuspension("Transaction end"); 1865 runtime->ExitTransactionMode(); 1866 1867 if (!success) { 1868 CHECK(soa.Self()->IsExceptionPending()); 1869 ThrowLocation throw_location; 1870 mirror::Throwable* exception = soa.Self()->GetException(&throw_location); 1871 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 1872 << exception->Dump(); 1873 soa.Self()->ClearException(); 1874 transaction.Abort(); 1875 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 1876 } 1877 soa.Self()->EndAssertNoThreadSuspension(old_casue); 1878 } 1879 } 1880 } 1881 soa.Self()->AssertNoPendingException(); 1882 } 1883 } 1884 // Record the final class status if necessary. 1885 ClassReference ref(manager->GetDexFile(), class_def_index); 1886 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1887 } 1888 // Clear any class not found or verification exceptions. 1889 soa.Self()->ClearException(); 1890} 1891 1892void CompilerDriver::InitializeClasses(jobject jni_class_loader, const DexFile& dex_file, 1893 ThreadPool& thread_pool, TimingLogger& timings) { 1894 timings.NewSplit("InitializeNoClinit"); 1895 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1896 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, thread_pool); 1897 size_t thread_count; 1898 if (IsImage()) { 1899 // TODO: remove this when transactional mode supports multithreading. 1900 thread_count = 1U; 1901 } else { 1902 thread_count = thread_count_; 1903 } 1904 context.ForAll(0, dex_file.NumClassDefs(), InitializeClass, thread_count); 1905 if (IsImage()) { 1906 // Prune garbage objects created during aborted transactions. 1907 Runtime::Current()->GetHeap()->CollectGarbage(true); 1908 } 1909} 1910 1911void CompilerDriver::InitializeClasses(jobject class_loader, 1912 const std::vector<const DexFile*>& dex_files, 1913 ThreadPool& thread_pool, TimingLogger& timings) { 1914 for (size_t i = 0; i != dex_files.size(); ++i) { 1915 const DexFile* dex_file = dex_files[i]; 1916 CHECK(dex_file != NULL); 1917 InitializeClasses(class_loader, *dex_file, thread_pool, timings); 1918 } 1919} 1920 1921void CompilerDriver::Compile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1922 ThreadPool& thread_pool, TimingLogger& timings) { 1923 for (size_t i = 0; i != dex_files.size(); ++i) { 1924 const DexFile* dex_file = dex_files[i]; 1925 CHECK(dex_file != NULL); 1926 CompileDexFile(class_loader, *dex_file, thread_pool, timings); 1927 } 1928} 1929 1930void CompilerDriver::CompileClass(const ParallelCompilationManager* manager, size_t class_def_index) { 1931 ATRACE_CALL(); 1932 jobject jclass_loader = manager->GetClassLoader(); 1933 const DexFile& dex_file = *manager->GetDexFile(); 1934 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1935 ClassLinker* class_linker = manager->GetClassLinker(); 1936 if (SkipClass(class_linker, jclass_loader, dex_file, class_def)) { 1937 return; 1938 } 1939 ClassReference ref(&dex_file, class_def_index); 1940 // Skip compiling classes with generic verifier failures since they will still fail at runtime 1941 if (manager->GetCompiler()->verification_results_->IsClassRejected(ref)) { 1942 return; 1943 } 1944 const byte* class_data = dex_file.GetClassData(class_def); 1945 if (class_data == NULL) { 1946 // empty class, probably a marker interface 1947 return; 1948 } 1949 1950 // Can we run DEX-to-DEX compiler on this class ? 1951 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 1952 { 1953 ScopedObjectAccess soa(Thread::Current()); 1954 SirtRef<mirror::ClassLoader> class_loader(soa.Self(), 1955 soa.Decode<mirror::ClassLoader*>(jclass_loader)); 1956 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(class_loader, dex_file, class_def); 1957 } 1958 ClassDataItemIterator it(dex_file, class_data); 1959 // Skip fields 1960 while (it.HasNextStaticField()) { 1961 it.Next(); 1962 } 1963 while (it.HasNextInstanceField()) { 1964 it.Next(); 1965 } 1966 CompilerDriver* driver = manager->GetCompiler(); 1967 // Compile direct methods 1968 int64_t previous_direct_method_idx = -1; 1969 while (it.HasNextDirectMethod()) { 1970 uint32_t method_idx = it.GetMemberIndex(); 1971 if (method_idx == previous_direct_method_idx) { 1972 // smali can create dex files with two encoded_methods sharing the same method_idx 1973 // http://code.google.com/p/smali/issues/detail?id=119 1974 it.Next(); 1975 continue; 1976 } 1977 previous_direct_method_idx = method_idx; 1978 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), 1979 it.GetMethodInvokeType(class_def), class_def_index, 1980 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level); 1981 it.Next(); 1982 } 1983 // Compile virtual methods 1984 int64_t previous_virtual_method_idx = -1; 1985 while (it.HasNextVirtualMethod()) { 1986 uint32_t method_idx = it.GetMemberIndex(); 1987 if (method_idx == previous_virtual_method_idx) { 1988 // smali can create dex files with two encoded_methods sharing the same method_idx 1989 // http://code.google.com/p/smali/issues/detail?id=119 1990 it.Next(); 1991 continue; 1992 } 1993 previous_virtual_method_idx = method_idx; 1994 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), 1995 it.GetMethodInvokeType(class_def), class_def_index, 1996 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level); 1997 it.Next(); 1998 } 1999 DCHECK(!it.HasNext()); 2000} 2001 2002void CompilerDriver::CompileDexFile(jobject class_loader, const DexFile& dex_file, 2003 ThreadPool& thread_pool, TimingLogger& timings) { 2004 timings.NewSplit("Compile Dex File"); 2005 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2006 &dex_file, thread_pool); 2007 context.ForAll(0, dex_file.NumClassDefs(), CompilerDriver::CompileClass, thread_count_); 2008} 2009 2010void CompilerDriver::CompileMethod(const DexFile::CodeItem* code_item, uint32_t access_flags, 2011 InvokeType invoke_type, uint16_t class_def_idx, 2012 uint32_t method_idx, jobject class_loader, 2013 const DexFile& dex_file, 2014 DexToDexCompilationLevel dex_to_dex_compilation_level) { 2015 CompiledMethod* compiled_method = NULL; 2016 uint64_t start_ns = NanoTime(); 2017 2018 if ((access_flags & kAccNative) != 0) { 2019 compiled_method = (*jni_compiler_)(*this, access_flags, method_idx, dex_file); 2020 CHECK(compiled_method != NULL); 2021 } else if ((access_flags & kAccAbstract) != 0) { 2022 } else { 2023 MethodReference method_ref(&dex_file, method_idx); 2024 bool compile = VerificationResults::IsCandidateForCompilation(method_ref, access_flags); 2025 2026 if (compile) { 2027 CompilerFn compiler = compiler_; 2028#ifdef ART_SEA_IR_MODE 2029 bool use_sea = Runtime::Current()->IsSeaIRMode(); 2030 use_sea = use_sea && 2031 (std::string::npos != PrettyMethod(method_idx, dex_file).find("fibonacci")); 2032 if (use_sea) { 2033 compiler = sea_ir_compiler_; 2034 LOG(INFO) << "Using SEA IR to compile..." << std::endl; 2035 } 2036#endif 2037 // NOTE: if compiler declines to compile this method, it will return NULL. 2038 compiled_method = (*compiler)(*this, code_item, access_flags, invoke_type, class_def_idx, 2039 method_idx, class_loader, dex_file); 2040 } else if (dex_to_dex_compilation_level != kDontDexToDexCompile) { 2041 // TODO: add a mode to disable DEX-to-DEX compilation ? 2042 (*dex_to_dex_compiler_)(*this, code_item, access_flags, 2043 invoke_type, class_def_idx, 2044 method_idx, class_loader, dex_file, 2045 dex_to_dex_compilation_level); 2046 } 2047 } 2048 uint64_t duration_ns = NanoTime() - start_ns; 2049#ifdef ART_USE_PORTABLE_COMPILER 2050 const uint64_t kWarnMilliSeconds = 1000; 2051#else 2052 const uint64_t kWarnMilliSeconds = 100; 2053#endif 2054 if (duration_ns > MsToNs(kWarnMilliSeconds)) { 2055 LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) 2056 << " took " << PrettyDuration(duration_ns); 2057 } 2058 2059 Thread* self = Thread::Current(); 2060 if (compiled_method != NULL) { 2061 MethodReference ref(&dex_file, method_idx); 2062 DCHECK(GetCompiledMethod(ref) == NULL) << PrettyMethod(method_idx, dex_file); 2063 { 2064 MutexLock mu(self, compiled_methods_lock_); 2065 compiled_methods_.Put(ref, compiled_method); 2066 } 2067 DCHECK(GetCompiledMethod(ref) != NULL) << PrettyMethod(method_idx, dex_file); 2068 } 2069 2070 if (self->IsExceptionPending()) { 2071 ScopedObjectAccess soa(self); 2072 LOG(FATAL) << "Unexpected exception compiling: " << PrettyMethod(method_idx, dex_file) << "\n" 2073 << self->GetException(NULL)->Dump(); 2074 } 2075} 2076 2077CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2078 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2079 ClassTable::const_iterator it = compiled_classes_.find(ref); 2080 if (it == compiled_classes_.end()) { 2081 return NULL; 2082 } 2083 CHECK(it->second != NULL); 2084 return it->second; 2085} 2086 2087void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2088 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2089 auto it = compiled_classes_.find(ref); 2090 if (it == compiled_classes_.end() || it->second->GetStatus() != status) { 2091 // An entry doesn't exist or the status is lower than the new status. 2092 if (it != compiled_classes_.end()) { 2093 CHECK_GT(status, it->second->GetStatus()); 2094 delete it->second; 2095 } 2096 switch (status) { 2097 case mirror::Class::kStatusNotReady: 2098 case mirror::Class::kStatusError: 2099 case mirror::Class::kStatusRetryVerificationAtRuntime: 2100 case mirror::Class::kStatusVerified: 2101 case mirror::Class::kStatusInitialized: 2102 break; // Expected states. 2103 default: 2104 LOG(FATAL) << "Unexpected class status for class " 2105 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2106 << " of " << status; 2107 } 2108 CompiledClass* compiled_class = new CompiledClass(status); 2109 compiled_classes_.Overwrite(ref, compiled_class); 2110 } 2111} 2112 2113CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2114 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2115 MethodTable::const_iterator it = compiled_methods_.find(ref); 2116 if (it == compiled_methods_.end()) { 2117 return NULL; 2118 } 2119 CHECK(it->second != NULL); 2120 return it->second; 2121} 2122 2123void CompilerDriver::SetBitcodeFileName(std::string const& filename) { 2124 typedef void (*SetBitcodeFileNameFn)(CompilerDriver&, std::string const&); 2125 2126 SetBitcodeFileNameFn set_bitcode_file_name = 2127 reinterpret_cast<SetBitcodeFileNameFn>(compilerLLVMSetBitcodeFileName); 2128 2129 set_bitcode_file_name(*this, filename); 2130} 2131 2132 2133void CompilerDriver::AddRequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2134 uint16_t class_def_index) { 2135 WriterMutexLock mu(self, freezing_constructor_lock_); 2136 freezing_constructor_classes_.insert(ClassReference(dex_file, class_def_index)); 2137} 2138 2139bool CompilerDriver::RequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2140 uint16_t class_def_index) { 2141 ReaderMutexLock mu(self, freezing_constructor_lock_); 2142 return freezing_constructor_classes_.count(ClassReference(dex_file, class_def_index)) != 0; 2143} 2144 2145bool CompilerDriver::WriteElf(const std::string& android_root, 2146 bool is_host, 2147 const std::vector<const art::DexFile*>& dex_files, 2148 OatWriter& oat_writer, 2149 art::File* file) 2150 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 2151#if defined(ART_USE_PORTABLE_COMPILER) 2152 return art::ElfWriterMclinker::Create(file, oat_writer, dex_files, android_root, is_host, *this); 2153#else 2154 return art::ElfWriterQuick::Create(file, oat_writer, dex_files, android_root, is_host, *this); 2155#endif 2156} 2157void CompilerDriver::InstructionSetToLLVMTarget(InstructionSet instruction_set, 2158 std::string& target_triple, 2159 std::string& target_cpu, 2160 std::string& target_attr) { 2161 switch (instruction_set) { 2162 case kThumb2: 2163 target_triple = "thumb-none-linux-gnueabi"; 2164 target_cpu = "cortex-a9"; 2165 target_attr = "+thumb2,+neon,+neonfp,+vfp3,+db"; 2166 break; 2167 2168 case kArm: 2169 target_triple = "armv7-none-linux-gnueabi"; 2170 // TODO: Fix for Nexus S. 2171 target_cpu = "cortex-a9"; 2172 // TODO: Fix for Xoom. 2173 target_attr = "+v7,+neon,+neonfp,+vfp3,+db"; 2174 break; 2175 2176 case kX86: 2177 target_triple = "i386-pc-linux-gnu"; 2178 target_attr = ""; 2179 break; 2180 2181 case kMips: 2182 target_triple = "mipsel-unknown-linux"; 2183 target_attr = "mips32r2"; 2184 break; 2185 2186 default: 2187 LOG(FATAL) << "Unknown instruction set: " << instruction_set; 2188 } 2189 } 2190} // namespace art 2191