compiler_driver.cc revision 5812e20ff7cbc8efa0b8d7486ada2f58840a6ad5
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#include <unordered_set> 20#include <vector> 21#include <unistd.h> 22 23#ifndef __APPLE__ 24#include <malloc.h> // For mallinfo 25#endif 26 27#include "android-base/strings.h" 28 29#include "art_field-inl.h" 30#include "art_method-inl.h" 31#include "base/array_ref.h" 32#include "base/bit_vector.h" 33#include "base/enums.h" 34#include "base/stl_util.h" 35#include "base/systrace.h" 36#include "base/time_utils.h" 37#include "base/timing_logger.h" 38#include "class_linker-inl.h" 39#include "compiled_class.h" 40#include "compiled_method.h" 41#include "compiler.h" 42#include "compiler_callbacks.h" 43#include "compiler_driver-inl.h" 44#include "dex_compilation_unit.h" 45#include "dex_file-inl.h" 46#include "dex_instruction-inl.h" 47#include "dex/dex_to_dex_compiler.h" 48#include "dex/dex_to_dex_decompiler.h" 49#include "dex/verification_results.h" 50#include "dex/verified_method.h" 51#include "driver/compiler_options.h" 52#include "intrinsics_enum.h" 53#include "jni_internal.h" 54#include "object_lock.h" 55#include "runtime.h" 56#include "gc/accounting/card_table-inl.h" 57#include "gc/accounting/heap_bitmap.h" 58#include "gc/space/image_space.h" 59#include "gc/space/space.h" 60#include "mirror/class_loader.h" 61#include "mirror/class-inl.h" 62#include "mirror/dex_cache-inl.h" 63#include "mirror/object-inl.h" 64#include "mirror/object_array-inl.h" 65#include "mirror/throwable.h" 66#include "scoped_thread_state_change-inl.h" 67#include "ScopedLocalRef.h" 68#include "handle_scope-inl.h" 69#include "thread.h" 70#include "thread_list.h" 71#include "thread_pool.h" 72#include "trampolines/trampoline_compiler.h" 73#include "transaction.h" 74#include "utils/atomic_method_ref_map-inl.h" 75#include "utils/dex_cache_arrays_layout-inl.h" 76#include "utils/swap_space.h" 77#include "vdex_file.h" 78#include "verifier/method_verifier.h" 79#include "verifier/method_verifier-inl.h" 80#include "verifier/verifier_log_mode.h" 81#include "verifier/verifier_deps.h" 82 83namespace art { 84 85static constexpr bool kTimeCompileMethod = !kIsDebugBuild; 86 87// Print additional info during profile guided compilation. 88static constexpr bool kDebugProfileGuidedCompilation = false; 89 90static double Percentage(size_t x, size_t y) { 91 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 92} 93 94static void DumpStat(size_t x, size_t y, const char* str) { 95 if (x == 0 && y == 0) { 96 return; 97 } 98 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 99} 100 101class CompilerDriver::AOTCompilationStats { 102 public: 103 AOTCompilationStats() 104 : stats_lock_("AOT compilation statistics lock"), 105 resolved_types_(0), unresolved_types_(0), 106 resolved_instance_fields_(0), unresolved_instance_fields_(0), 107 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 108 type_based_devirtualization_(0), 109 safe_casts_(0), not_safe_casts_(0) { 110 for (size_t i = 0; i <= kMaxInvokeType; i++) { 111 resolved_methods_[i] = 0; 112 unresolved_methods_[i] = 0; 113 virtual_made_direct_[i] = 0; 114 direct_calls_to_boot_[i] = 0; 115 direct_methods_to_boot_[i] = 0; 116 } 117 } 118 119 void Dump() { 120 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 121 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 122 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 123 "static fields resolved"); 124 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 125 "static fields local to a class"); 126 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 127 // Note, the code below subtracts the stat value so that when added to the stat value we have 128 // 100% of samples. TODO: clean this up. 129 DumpStat(type_based_devirtualization_, 130 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 131 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 132 type_based_devirtualization_, 133 "virtual/interface calls made direct based on type information"); 134 135 for (size_t i = 0; i <= kMaxInvokeType; i++) { 136 std::ostringstream oss; 137 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 138 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 139 if (virtual_made_direct_[i] > 0) { 140 std::ostringstream oss2; 141 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 142 DumpStat(virtual_made_direct_[i], 143 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 144 oss2.str().c_str()); 145 } 146 if (direct_calls_to_boot_[i] > 0) { 147 std::ostringstream oss2; 148 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 149 DumpStat(direct_calls_to_boot_[i], 150 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 151 oss2.str().c_str()); 152 } 153 if (direct_methods_to_boot_[i] > 0) { 154 std::ostringstream oss2; 155 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 156 DumpStat(direct_methods_to_boot_[i], 157 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 158 oss2.str().c_str()); 159 } 160 } 161 } 162 163// Allow lossy statistics in non-debug builds. 164#ifndef NDEBUG 165#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 166#else 167#define STATS_LOCK() 168#endif 169 170 void TypeDoesntNeedAccessCheck() REQUIRES(!stats_lock_) { 171 STATS_LOCK(); 172 resolved_types_++; 173 } 174 175 void TypeNeedsAccessCheck() REQUIRES(!stats_lock_) { 176 STATS_LOCK(); 177 unresolved_types_++; 178 } 179 180 void ResolvedInstanceField() REQUIRES(!stats_lock_) { 181 STATS_LOCK(); 182 resolved_instance_fields_++; 183 } 184 185 void UnresolvedInstanceField() REQUIRES(!stats_lock_) { 186 STATS_LOCK(); 187 unresolved_instance_fields_++; 188 } 189 190 void ResolvedLocalStaticField() REQUIRES(!stats_lock_) { 191 STATS_LOCK(); 192 resolved_local_static_fields_++; 193 } 194 195 void ResolvedStaticField() REQUIRES(!stats_lock_) { 196 STATS_LOCK(); 197 resolved_static_fields_++; 198 } 199 200 void UnresolvedStaticField() REQUIRES(!stats_lock_) { 201 STATS_LOCK(); 202 unresolved_static_fields_++; 203 } 204 205 // Indicate that type information from the verifier led to devirtualization. 206 void PreciseTypeDevirtualization() REQUIRES(!stats_lock_) { 207 STATS_LOCK(); 208 type_based_devirtualization_++; 209 } 210 211 // A check-cast could be eliminated due to verifier type analysis. 212 void SafeCast() REQUIRES(!stats_lock_) { 213 STATS_LOCK(); 214 safe_casts_++; 215 } 216 217 // A check-cast couldn't be eliminated due to verifier type analysis. 218 void NotASafeCast() REQUIRES(!stats_lock_) { 219 STATS_LOCK(); 220 not_safe_casts_++; 221 } 222 223 private: 224 Mutex stats_lock_; 225 226 size_t resolved_types_; 227 size_t unresolved_types_; 228 229 size_t resolved_instance_fields_; 230 size_t unresolved_instance_fields_; 231 232 size_t resolved_local_static_fields_; 233 size_t resolved_static_fields_; 234 size_t unresolved_static_fields_; 235 // Type based devirtualization for invoke interface and virtual. 236 size_t type_based_devirtualization_; 237 238 size_t resolved_methods_[kMaxInvokeType + 1]; 239 size_t unresolved_methods_[kMaxInvokeType + 1]; 240 size_t virtual_made_direct_[kMaxInvokeType + 1]; 241 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 242 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 243 244 size_t safe_casts_; 245 size_t not_safe_casts_; 246 247 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 248}; 249 250class CompilerDriver::DexFileMethodSet { 251 public: 252 explicit DexFileMethodSet(const DexFile& dex_file) 253 : dex_file_(dex_file), 254 method_indexes_(dex_file.NumMethodIds(), false, Allocator::GetMallocAllocator()) { 255 } 256 DexFileMethodSet(DexFileMethodSet&& other) = default; 257 258 const DexFile& GetDexFile() const { return dex_file_; } 259 260 BitVector& GetMethodIndexes() { return method_indexes_; } 261 const BitVector& GetMethodIndexes() const { return method_indexes_; } 262 263 private: 264 const DexFile& dex_file_; 265 BitVector method_indexes_; 266}; 267 268CompilerDriver::CompilerDriver( 269 const CompilerOptions* compiler_options, 270 VerificationResults* verification_results, 271 Compiler::Kind compiler_kind, 272 InstructionSet instruction_set, 273 const InstructionSetFeatures* instruction_set_features, 274 std::unordered_set<std::string>* image_classes, 275 std::unordered_set<std::string>* compiled_classes, 276 std::unordered_set<std::string>* compiled_methods, 277 size_t thread_count, 278 bool dump_stats, 279 bool dump_passes, 280 CumulativeLogger* timer, 281 int swap_fd, 282 const ProfileCompilationInfo* profile_compilation_info) 283 : compiler_options_(compiler_options), 284 verification_results_(verification_results), 285 compiler_(Compiler::Create(this, compiler_kind)), 286 compiler_kind_(compiler_kind), 287 instruction_set_(instruction_set == kArm ? kThumb2 : instruction_set), 288 instruction_set_features_(instruction_set_features), 289 requires_constructor_barrier_lock_("constructor barrier lock"), 290 compiled_classes_lock_("compiled classes lock"), 291 non_relative_linker_patch_count_(0u), 292 image_classes_(image_classes), 293 classes_to_compile_(compiled_classes), 294 methods_to_compile_(compiled_methods), 295 had_hard_verifier_failure_(false), 296 parallel_thread_count_(thread_count), 297 stats_(new AOTCompilationStats), 298 dump_stats_(dump_stats), 299 dump_passes_(dump_passes), 300 timings_logger_(timer), 301 compiler_context_(nullptr), 302 support_boot_image_fixup_(true), 303 dex_files_for_oat_file_(nullptr), 304 compiled_method_storage_(swap_fd), 305 profile_compilation_info_(profile_compilation_info), 306 max_arena_alloc_(0), 307 dex_to_dex_references_lock_("dex-to-dex references lock"), 308 dex_to_dex_references_(), 309 current_dex_to_dex_methods_(nullptr) { 310 DCHECK(compiler_options_ != nullptr); 311 312 compiler_->Init(); 313 314 if (compiler_options->VerifyOnlyProfile()) { 315 CHECK(profile_compilation_info_ != nullptr) << "Requires profile"; 316 } 317 if (GetCompilerOptions().IsBootImage()) { 318 CHECK(image_classes_.get() != nullptr) << "Expected image classes for boot image"; 319 } 320} 321 322CompilerDriver::~CompilerDriver() { 323 Thread* self = Thread::Current(); 324 { 325 MutexLock mu(self, compiled_classes_lock_); 326 STLDeleteValues(&compiled_classes_); 327 } 328 compiled_methods_.Visit([this](const MethodReference& ref ATTRIBUTE_UNUSED, 329 CompiledMethod* method) { 330 if (method != nullptr) { 331 CompiledMethod::ReleaseSwapAllocatedCompiledMethod(this, method); 332 } 333 }); 334 compiler_->UnInit(); 335} 336 337 338#define CREATE_TRAMPOLINE(type, abi, offset) \ 339 if (Is64BitInstructionSet(instruction_set_)) { \ 340 return CreateTrampoline64(instruction_set_, abi, \ 341 type ## _ENTRYPOINT_OFFSET(PointerSize::k64, offset)); \ 342 } else { \ 343 return CreateTrampoline32(instruction_set_, abi, \ 344 type ## _ENTRYPOINT_OFFSET(PointerSize::k32, offset)); \ 345 } 346 347std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateJniDlsymLookup() const { 348 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 349} 350 351std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickGenericJniTrampoline() 352 const { 353 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 354} 355 356std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickImtConflictTrampoline() 357 const { 358 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 359} 360 361std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickResolutionTrampoline() 362 const { 363 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 364} 365 366std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickToInterpreterBridge() 367 const { 368 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 369} 370#undef CREATE_TRAMPOLINE 371 372static void SetupIntrinsic(Thread* self, 373 Intrinsics intrinsic, 374 InvokeType invoke_type, 375 const char* class_name, 376 const char* method_name, 377 const char* signature) 378 REQUIRES_SHARED(Locks::mutator_lock_) { 379 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 380 PointerSize image_size = class_linker->GetImagePointerSize(); 381 mirror::Class* cls = class_linker->FindSystemClass(self, class_name); 382 if (cls == nullptr) { 383 LOG(FATAL) << "Could not find class of intrinsic " << class_name; 384 } 385 ArtMethod* method = (invoke_type == kStatic || invoke_type == kDirect) 386 ? cls->FindDeclaredDirectMethod(method_name, signature, image_size) 387 : cls->FindDeclaredVirtualMethod(method_name, signature, image_size); 388 if (method == nullptr) { 389 LOG(FATAL) << "Could not find method of intrinsic " 390 << class_name << " " << method_name << " " << signature; 391 } 392 DCHECK_EQ(method->GetInvokeType(), invoke_type); 393 method->SetIntrinsic(static_cast<uint32_t>(intrinsic)); 394} 395 396void CompilerDriver::CompileAll(jobject class_loader, 397 const std::vector<const DexFile*>& dex_files, 398 TimingLogger* timings) { 399 DCHECK(!Runtime::Current()->IsStarted()); 400 401 InitializeThreadPools(); 402 403 VLOG(compiler) << "Before precompile " << GetMemoryUsageString(false); 404 // Precompile: 405 // 1) Load image classes 406 // 2) Resolve all classes 407 // 3) Attempt to verify all classes 408 // 4) Attempt to initialize image classes, and trivially initialized classes 409 PreCompile(class_loader, dex_files, timings); 410 if (GetCompilerOptions().IsBootImage()) { 411 // We don't need to setup the intrinsics for non boot image compilation, as 412 // those compilations will pick up a boot image that have the ArtMethod already 413 // set with the intrinsics flag. 414 ScopedObjectAccess soa(Thread::Current()); 415#define SETUP_INTRINSICS(Name, InvokeType, NeedsEnvironmentOrCache, SideEffects, Exceptions, \ 416 ClassName, MethodName, Signature) \ 417 SetupIntrinsic(soa.Self(), Intrinsics::k##Name, InvokeType, ClassName, MethodName, Signature); 418#include "intrinsics_list.h" 419INTRINSICS_LIST(SETUP_INTRINSICS) 420#undef INTRINSICS_LIST 421#undef SETUP_INTRINSICS 422 } 423 // Compile: 424 // 1) Compile all classes and methods enabled for compilation. May fall back to dex-to-dex 425 // compilation. 426 if (GetCompilerOptions().IsAnyMethodCompilationEnabled()) { 427 Compile(class_loader, dex_files, timings); 428 } 429 if (dump_stats_) { 430 stats_->Dump(); 431 } 432 433 FreeThreadPools(); 434} 435 436// In-place unquicken the given `dex_files` based on `quickening_info`. 437static void Unquicken(const std::vector<const DexFile*>& dex_files, 438 const ArrayRef<const uint8_t>& quickening_info, 439 bool decompile_return_instruction) { 440 const uint8_t* quickening_info_ptr = quickening_info.data(); 441 const uint8_t* const quickening_info_end = quickening_info.data() + quickening_info.size(); 442 for (const DexFile* dex_file : dex_files) { 443 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 444 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 445 const uint8_t* class_data = dex_file->GetClassData(class_def); 446 if (class_data == nullptr) { 447 continue; 448 } 449 ClassDataItemIterator it(*dex_file, class_data); 450 // Skip fields 451 while (it.HasNextStaticField()) { 452 it.Next(); 453 } 454 while (it.HasNextInstanceField()) { 455 it.Next(); 456 } 457 458 while (it.HasNextDirectMethod()) { 459 const DexFile::CodeItem* code_item = it.GetMethodCodeItem(); 460 if (code_item != nullptr) { 461 uint32_t quickening_size = *reinterpret_cast<const uint32_t*>(quickening_info_ptr); 462 quickening_info_ptr += sizeof(uint32_t); 463 optimizer::ArtDecompileDEX(*code_item, 464 ArrayRef<const uint8_t>(quickening_info_ptr, quickening_size), 465 decompile_return_instruction); 466 quickening_info_ptr += quickening_size; 467 } 468 it.Next(); 469 } 470 471 while (it.HasNextVirtualMethod()) { 472 const DexFile::CodeItem* code_item = it.GetMethodCodeItem(); 473 if (code_item != nullptr) { 474 uint32_t quickening_size = *reinterpret_cast<const uint32_t*>(quickening_info_ptr); 475 quickening_info_ptr += sizeof(uint32_t); 476 optimizer::ArtDecompileDEX(*code_item, 477 ArrayRef<const uint8_t>(quickening_info_ptr, quickening_size), 478 decompile_return_instruction); 479 quickening_info_ptr += quickening_size; 480 } 481 it.Next(); 482 } 483 DCHECK(!it.HasNext()); 484 } 485 } 486 DCHECK_EQ(quickening_info_ptr, quickening_info_end) << "Failed to use all quickening info"; 487} 488 489void CompilerDriver::CompileAll(jobject class_loader, 490 const std::vector<const DexFile*>& dex_files, 491 VdexFile* vdex_file, 492 TimingLogger* timings) { 493 if (vdex_file != nullptr) { 494 // TODO: we unquicken unconditionnally, as we don't know 495 // if the boot image has changed. How exactly we'll know is under 496 // experimentation. 497 if (vdex_file->GetQuickeningInfo().size() != 0) { 498 TimingLogger::ScopedTiming t("Unquicken", timings); 499 // We do not decompile a RETURN_VOID_NO_BARRIER into a RETURN_VOID, as the quickening 500 // optimization does not depend on the boot image (the optimization relies on not 501 // having final fields in a class, which does not change for an app). 502 Unquicken(dex_files, 503 vdex_file->GetQuickeningInfo(), 504 /* decompile_return_instruction */ false); 505 } 506 Runtime::Current()->GetCompilerCallbacks()->SetVerifierDeps( 507 new verifier::VerifierDeps(dex_files, vdex_file->GetVerifierDepsData())); 508 } 509 CompileAll(class_loader, dex_files, timings); 510} 511 512static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 513 Thread* self, const CompilerDriver& driver, Handle<mirror::ClassLoader> class_loader, 514 const DexFile& dex_file, const DexFile::ClassDef& class_def) 515 REQUIRES_SHARED(Locks::mutator_lock_) { 516 auto* const runtime = Runtime::Current(); 517 DCHECK(driver.GetCompilerOptions().IsAnyMethodCompilationEnabled()); 518 const char* descriptor = dex_file.GetClassDescriptor(class_def); 519 ClassLinker* class_linker = runtime->GetClassLinker(); 520 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 521 if (klass == nullptr) { 522 CHECK(self->IsExceptionPending()); 523 self->ClearException(); 524 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 525 } 526 // DexToDex at the kOptimize level may introduce quickened opcodes, which replace symbolic 527 // references with actual offsets. We cannot re-verify such instructions. 528 // 529 // We store the verification information in the class status in the oat file, which the linker 530 // can validate (checksums) and use to skip load-time verification. It is thus safe to 531 // optimize when a class has been fully verified before. 532 optimizer::DexToDexCompilationLevel max_level = optimizer::DexToDexCompilationLevel::kOptimize; 533 if (driver.GetCompilerOptions().GetDebuggable()) { 534 // We are debuggable so definitions of classes might be changed. We don't want to do any 535 // optimizations that could break that. 536 max_level = optimizer::DexToDexCompilationLevel::kRequired; 537 } 538 if (klass->IsVerified()) { 539 // Class is verified so we can enable DEX-to-DEX compilation for performance. 540 return max_level; 541 } else if (klass->IsCompileTimeVerified()) { 542 // Class verification has soft-failed. Anyway, ensure at least correctness. 543 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 544 return optimizer::DexToDexCompilationLevel::kRequired; 545 } else { 546 // Class verification has failed: do not run DEX-to-DEX compilation. 547 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 548 } 549} 550 551static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 552 Thread* self, 553 const CompilerDriver& driver, 554 jobject jclass_loader, 555 const DexFile& dex_file, 556 const DexFile::ClassDef& class_def) { 557 ScopedObjectAccess soa(self); 558 StackHandleScope<1> hs(soa.Self()); 559 Handle<mirror::ClassLoader> class_loader( 560 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 561 return GetDexToDexCompilationLevel(self, driver, class_loader, dex_file, class_def); 562} 563 564// Does the runtime for the InstructionSet provide an implementation returned by 565// GetQuickGenericJniStub allowing down calls that aren't compiled using a JNI compiler? 566static bool InstructionSetHasGenericJniStub(InstructionSet isa) { 567 switch (isa) { 568 case kArm: 569 case kArm64: 570 case kThumb2: 571 case kMips: 572 case kMips64: 573 case kX86: 574 case kX86_64: return true; 575 default: return false; 576 } 577} 578 579static void CompileMethod(Thread* self, 580 CompilerDriver* driver, 581 const DexFile::CodeItem* code_item, 582 uint32_t access_flags, 583 InvokeType invoke_type, 584 uint16_t class_def_idx, 585 uint32_t method_idx, 586 jobject class_loader, 587 const DexFile& dex_file, 588 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level, 589 bool compilation_enabled, 590 Handle<mirror::DexCache> dex_cache) { 591 DCHECK(driver != nullptr); 592 CompiledMethod* compiled_method = nullptr; 593 uint64_t start_ns = kTimeCompileMethod ? NanoTime() : 0; 594 MethodReference method_ref(&dex_file, method_idx); 595 596 if (driver->GetCurrentDexToDexMethods() != nullptr) { 597 // This is the second pass when we dex-to-dex compile previously marked methods. 598 // TODO: Refactor the compilation to avoid having to distinguish the two passes 599 // here. That should be done on a higher level. http://b/29089975 600 if (driver->GetCurrentDexToDexMethods()->IsBitSet(method_idx)) { 601 const VerifiedMethod* verified_method = 602 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 603 // Do not optimize if a VerifiedMethod is missing. SafeCast elision, 604 // for example, relies on it. 605 compiled_method = optimizer::ArtCompileDEX( 606 driver, 607 code_item, 608 access_flags, 609 invoke_type, 610 class_def_idx, 611 method_idx, 612 class_loader, 613 dex_file, 614 (verified_method != nullptr) 615 ? dex_to_dex_compilation_level 616 : optimizer::DexToDexCompilationLevel::kRequired); 617 } 618 } else if ((access_flags & kAccNative) != 0) { 619 // Are we extracting only and have support for generic JNI down calls? 620 if (!driver->GetCompilerOptions().IsJniCompilationEnabled() && 621 InstructionSetHasGenericJniStub(driver->GetInstructionSet())) { 622 // Leaving this empty will trigger the generic JNI version 623 } else { 624 // Look-up the ArtMethod associated with this code_item (if any) 625 // -- It is later used to lookup any [optimization] annotations for this method. 626 ScopedObjectAccess soa(self); 627 StackHandleScope<1> hs(soa.Self()); 628 Handle<mirror::ClassLoader> class_loader_handle(hs.NewHandle( 629 soa.Decode<mirror::ClassLoader>(class_loader))); 630 631 // TODO: Lookup annotation from DexFile directly without resolving method. 632 ArtMethod* method = 633 Runtime::Current()->GetClassLinker()->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 634 dex_file, 635 method_idx, 636 dex_cache, 637 class_loader_handle, 638 /* referrer */ nullptr, 639 invoke_type); 640 641 // Query any JNI optimization annotations such as @FastNative or @CriticalNative. 642 Compiler::JniOptimizationFlags optimization_flags = Compiler::kNone; 643 if (UNLIKELY(method == nullptr)) { 644 // Failed method resolutions happen very rarely, e.g. ancestor class cannot be resolved. 645 DCHECK(self->IsExceptionPending()); 646 self->ClearException(); 647 } else if (method->IsAnnotatedWithFastNative()) { 648 // TODO: Will no longer need this CHECK once we have verifier checking this. 649 CHECK(!method->IsAnnotatedWithCriticalNative()); 650 optimization_flags = Compiler::kFastNative; 651 } else if (method->IsAnnotatedWithCriticalNative()) { 652 // TODO: Will no longer need this CHECK once we have verifier checking this. 653 CHECK(!method->IsAnnotatedWithFastNative()); 654 optimization_flags = Compiler::kCriticalNative; 655 } 656 657 compiled_method = driver->GetCompiler()->JniCompile(access_flags, 658 method_idx, 659 dex_file, 660 optimization_flags); 661 CHECK(compiled_method != nullptr); 662 } 663 } else if ((access_flags & kAccAbstract) != 0) { 664 // Abstract methods don't have code. 665 } else { 666 const VerifiedMethod* verified_method = 667 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 668 bool compile = compilation_enabled && 669 // Basic checks, e.g., not <clinit>. 670 driver->GetVerificationResults() 671 ->IsCandidateForCompilation(method_ref, access_flags) && 672 // Did not fail to create VerifiedMethod metadata. 673 verified_method != nullptr && 674 // Do not have failures that should punt to the interpreter. 675 !verified_method->HasRuntimeThrow() && 676 (verified_method->GetEncounteredVerificationFailures() & 677 (verifier::VERIFY_ERROR_FORCE_INTERPRETER | verifier::VERIFY_ERROR_LOCKING)) == 0 && 678 // Is eligable for compilation by methods-to-compile filter. 679 driver->IsMethodToCompile(method_ref) && 680 driver->ShouldCompileBasedOnProfile(method_ref); 681 682 if (compile) { 683 // NOTE: if compiler declines to compile this method, it will return null. 684 compiled_method = driver->GetCompiler()->Compile(code_item, access_flags, invoke_type, 685 class_def_idx, method_idx, class_loader, 686 dex_file, dex_cache); 687 } 688 if (compiled_method == nullptr && 689 dex_to_dex_compilation_level != optimizer::DexToDexCompilationLevel::kDontDexToDexCompile) { 690 DCHECK(!Runtime::Current()->UseJitCompilation()); 691 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 692 driver->MarkForDexToDexCompilation(self, method_ref); 693 } 694 } 695 if (kTimeCompileMethod) { 696 uint64_t duration_ns = NanoTime() - start_ns; 697 if (duration_ns > MsToNs(driver->GetCompiler()->GetMaximumCompilationTimeBeforeWarning())) { 698 LOG(WARNING) << "Compilation of " << dex_file.PrettyMethod(method_idx) 699 << " took " << PrettyDuration(duration_ns); 700 } 701 } 702 703 if (compiled_method != nullptr) { 704 // Count non-relative linker patches. 705 size_t non_relative_linker_patch_count = 0u; 706 for (const LinkerPatch& patch : compiled_method->GetPatches()) { 707 if (!patch.IsPcRelative()) { 708 ++non_relative_linker_patch_count; 709 } 710 } 711 bool compile_pic = driver->GetCompilerOptions().GetCompilePic(); // Off by default 712 // When compiling with PIC, there should be zero non-relative linker patches 713 CHECK(!compile_pic || non_relative_linker_patch_count == 0u); 714 715 driver->AddCompiledMethod(method_ref, compiled_method, non_relative_linker_patch_count); 716 } 717 718 if (self->IsExceptionPending()) { 719 ScopedObjectAccess soa(self); 720 LOG(FATAL) << "Unexpected exception compiling: " << dex_file.PrettyMethod(method_idx) << "\n" 721 << self->GetException()->Dump(); 722 } 723} 724 725void CompilerDriver::CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) { 726 DCHECK(!Runtime::Current()->IsStarted()); 727 jobject jclass_loader; 728 const DexFile* dex_file; 729 uint16_t class_def_idx; 730 uint32_t method_idx = method->GetDexMethodIndex(); 731 uint32_t access_flags = method->GetAccessFlags(); 732 InvokeType invoke_type = method->GetInvokeType(); 733 StackHandleScope<1> hs(self); 734 Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache())); 735 { 736 ScopedObjectAccessUnchecked soa(self); 737 ScopedLocalRef<jobject> local_class_loader( 738 soa.Env(), soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 739 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 740 // Find the dex_file 741 dex_file = method->GetDexFile(); 742 class_def_idx = method->GetClassDefIndex(); 743 } 744 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 745 746 // Go to native so that we don't block GC during compilation. 747 ScopedThreadSuspension sts(self, kNative); 748 749 std::vector<const DexFile*> dex_files; 750 dex_files.push_back(dex_file); 751 752 InitializeThreadPools(); 753 754 PreCompile(jclass_loader, dex_files, timings); 755 756 // Can we run DEX-to-DEX compiler on this class ? 757 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 758 GetDexToDexCompilationLevel(self, 759 *this, 760 jclass_loader, 761 *dex_file, 762 dex_file->GetClassDef(class_def_idx)); 763 764 DCHECK(current_dex_to_dex_methods_ == nullptr); 765 CompileMethod(self, 766 this, 767 code_item, 768 access_flags, 769 invoke_type, 770 class_def_idx, 771 method_idx, 772 jclass_loader, 773 *dex_file, 774 dex_to_dex_compilation_level, 775 true, 776 dex_cache); 777 778 ArrayRef<DexFileMethodSet> dex_to_dex_references; 779 { 780 // From this point on, we shall not modify dex_to_dex_references_, so 781 // just grab a reference to it that we use without holding the mutex. 782 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 783 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 784 } 785 if (!dex_to_dex_references.empty()) { 786 DCHECK_EQ(dex_to_dex_references.size(), 1u); 787 DCHECK(&dex_to_dex_references[0].GetDexFile() == dex_file); 788 current_dex_to_dex_methods_ = &dex_to_dex_references.front().GetMethodIndexes(); 789 DCHECK(current_dex_to_dex_methods_->IsBitSet(method_idx)); 790 DCHECK_EQ(current_dex_to_dex_methods_->NumSetBits(), 1u); 791 CompileMethod(self, 792 this, 793 code_item, 794 access_flags, 795 invoke_type, 796 class_def_idx, 797 method_idx, 798 jclass_loader, 799 *dex_file, 800 dex_to_dex_compilation_level, 801 true, 802 dex_cache); 803 current_dex_to_dex_methods_ = nullptr; 804 } 805 806 FreeThreadPools(); 807 808 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 809} 810 811void CompilerDriver::Resolve(jobject class_loader, 812 const std::vector<const DexFile*>& dex_files, 813 TimingLogger* timings) { 814 // Resolution allocates classes and needs to run single-threaded to be deterministic. 815 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 816 ThreadPool* resolve_thread_pool = force_determinism 817 ? single_thread_pool_.get() 818 : parallel_thread_pool_.get(); 819 size_t resolve_thread_count = force_determinism ? 1U : parallel_thread_count_; 820 821 for (size_t i = 0; i != dex_files.size(); ++i) { 822 const DexFile* dex_file = dex_files[i]; 823 CHECK(dex_file != nullptr); 824 ResolveDexFile(class_loader, 825 *dex_file, 826 dex_files, 827 resolve_thread_pool, 828 resolve_thread_count, 829 timings); 830 } 831} 832 833// Resolve const-strings in the code. Done to have deterministic allocation behavior. Right now 834// this is single-threaded for simplicity. 835// TODO: Collect the relevant string indices in parallel, then allocate them sequentially in a 836// stable order. 837 838static void ResolveConstStrings(Handle<mirror::DexCache> dex_cache, 839 const DexFile& dex_file, 840 const DexFile::CodeItem* code_item) 841 REQUIRES_SHARED(Locks::mutator_lock_) { 842 if (code_item == nullptr) { 843 // Abstract or native method. 844 return; 845 } 846 847 const uint16_t* code_ptr = code_item->insns_; 848 const uint16_t* code_end = code_item->insns_ + code_item->insns_size_in_code_units_; 849 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 850 851 while (code_ptr < code_end) { 852 const Instruction* inst = Instruction::At(code_ptr); 853 switch (inst->Opcode()) { 854 case Instruction::CONST_STRING: 855 case Instruction::CONST_STRING_JUMBO: { 856 dex::StringIndex string_index((inst->Opcode() == Instruction::CONST_STRING) 857 ? inst->VRegB_21c() 858 : inst->VRegB_31c()); 859 mirror::String* string = class_linker->ResolveString(dex_file, string_index, dex_cache); 860 CHECK(string != nullptr) << "Could not allocate a string when forcing determinism"; 861 break; 862 } 863 864 default: 865 break; 866 } 867 868 code_ptr += inst->SizeInCodeUnits(); 869 } 870} 871 872static void ResolveConstStrings(CompilerDriver* driver, 873 const std::vector<const DexFile*>& dex_files, 874 TimingLogger* timings) { 875 ScopedObjectAccess soa(Thread::Current()); 876 StackHandleScope<1> hs(soa.Self()); 877 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 878 MutableHandle<mirror::DexCache> dex_cache(hs.NewHandle<mirror::DexCache>(nullptr)); 879 880 for (const DexFile* dex_file : dex_files) { 881 dex_cache.Assign(class_linker->FindDexCache(soa.Self(), *dex_file)); 882 TimingLogger::ScopedTiming t("Resolve const-string Strings", timings); 883 884 size_t class_def_count = dex_file->NumClassDefs(); 885 for (size_t class_def_index = 0; class_def_index < class_def_count; ++class_def_index) { 886 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index); 887 888 const uint8_t* class_data = dex_file->GetClassData(class_def); 889 if (class_data == nullptr) { 890 // empty class, probably a marker interface 891 continue; 892 } 893 894 ClassDataItemIterator it(*dex_file, class_data); 895 // Skip fields 896 while (it.HasNextStaticField()) { 897 it.Next(); 898 } 899 while (it.HasNextInstanceField()) { 900 it.Next(); 901 } 902 903 bool compilation_enabled = driver->IsClassToCompile( 904 dex_file->StringByTypeIdx(class_def.class_idx_)); 905 if (!compilation_enabled) { 906 // Compilation is skipped, do not resolve const-string in code of this class. 907 // TODO: Make sure that inlining honors this. 908 continue; 909 } 910 911 // Direct methods. 912 int64_t previous_direct_method_idx = -1; 913 while (it.HasNextDirectMethod()) { 914 uint32_t method_idx = it.GetMemberIndex(); 915 if (method_idx == previous_direct_method_idx) { 916 // smali can create dex files with two encoded_methods sharing the same method_idx 917 // http://code.google.com/p/smali/issues/detail?id=119 918 it.Next(); 919 continue; 920 } 921 previous_direct_method_idx = method_idx; 922 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 923 it.Next(); 924 } 925 // Virtual methods. 926 int64_t previous_virtual_method_idx = -1; 927 while (it.HasNextVirtualMethod()) { 928 uint32_t method_idx = it.GetMemberIndex(); 929 if (method_idx == previous_virtual_method_idx) { 930 // smali can create dex files with two encoded_methods sharing the same method_idx 931 // http://code.google.com/p/smali/issues/detail?id=119 932 it.Next(); 933 continue; 934 } 935 previous_virtual_method_idx = method_idx; 936 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 937 it.Next(); 938 } 939 DCHECK(!it.HasNext()); 940 } 941 } 942} 943 944inline void CompilerDriver::CheckThreadPools() { 945 DCHECK(parallel_thread_pool_ != nullptr); 946 DCHECK(single_thread_pool_ != nullptr); 947} 948 949static void EnsureVerifiedOrVerifyAtRuntime(jobject jclass_loader, 950 const std::vector<const DexFile*>& dex_files) { 951 ScopedObjectAccess soa(Thread::Current()); 952 StackHandleScope<2> hs(soa.Self()); 953 Handle<mirror::ClassLoader> class_loader( 954 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 955 MutableHandle<mirror::Class> cls(hs.NewHandle<mirror::Class>(nullptr)); 956 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 957 958 for (const DexFile* dex_file : dex_files) { 959 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 960 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 961 const char* descriptor = dex_file->GetClassDescriptor(class_def); 962 cls.Assign(class_linker->FindClass(soa.Self(), descriptor, class_loader)); 963 if (cls.Get() == nullptr) { 964 soa.Self()->ClearException(); 965 } else if (&cls->GetDexFile() == dex_file) { 966 DCHECK(cls->IsErroneous() || cls->IsVerified() || cls->IsCompileTimeVerified()) 967 << cls->PrettyClass() 968 << " " << cls->GetStatus(); 969 } 970 } 971 } 972} 973 974void CompilerDriver::PreCompile(jobject class_loader, 975 const std::vector<const DexFile*>& dex_files, 976 TimingLogger* timings) { 977 CheckThreadPools(); 978 979 for (const DexFile* dex_file : dex_files) { 980 // Can be already inserted if the caller is CompileOne. This happens for gtests. 981 if (!compiled_methods_.HaveDexFile(dex_file)) { 982 compiled_methods_.AddDexFile(dex_file); 983 } 984 } 985 986 LoadImageClasses(timings); 987 VLOG(compiler) << "LoadImageClasses: " << GetMemoryUsageString(false); 988 989 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 990 Resolve(class_loader, dex_files, timings); 991 VLOG(compiler) << "Resolve: " << GetMemoryUsageString(false); 992 } 993 994 if (compiler_options_->AssumeClassesAreVerified()) { 995 VLOG(compiler) << "Verify none mode specified, skipping verification."; 996 SetVerified(class_loader, dex_files, timings); 997 } 998 999 if (!compiler_options_->IsVerificationEnabled()) { 1000 return; 1001 } 1002 1003 if (GetCompilerOptions().IsForceDeterminism() && GetCompilerOptions().IsBootImage()) { 1004 // Resolve strings from const-string. Do this now to have a deterministic image. 1005 ResolveConstStrings(this, dex_files, timings); 1006 VLOG(compiler) << "Resolve const-strings: " << GetMemoryUsageString(false); 1007 } 1008 1009 Verify(class_loader, dex_files, timings); 1010 VLOG(compiler) << "Verify: " << GetMemoryUsageString(false); 1011 1012 if (had_hard_verifier_failure_ && GetCompilerOptions().AbortOnHardVerifierFailure()) { 1013 LOG(FATAL) << "Had a hard failure verifying all classes, and was asked to abort in such " 1014 << "situations. Please check the log."; 1015 } 1016 1017 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 1018 if (kIsDebugBuild) { 1019 EnsureVerifiedOrVerifyAtRuntime(class_loader, dex_files); 1020 } 1021 InitializeClasses(class_loader, dex_files, timings); 1022 VLOG(compiler) << "InitializeClasses: " << GetMemoryUsageString(false); 1023 } 1024 1025 UpdateImageClasses(timings); 1026 VLOG(compiler) << "UpdateImageClasses: " << GetMemoryUsageString(false); 1027} 1028 1029bool CompilerDriver::IsImageClass(const char* descriptor) const { 1030 if (image_classes_ != nullptr) { 1031 // If we have a set of image classes, use those. 1032 return image_classes_->find(descriptor) != image_classes_->end(); 1033 } 1034 // No set of image classes, assume we include all the classes. 1035 // NOTE: Currently only reachable from InitImageMethodVisitor for the app image case. 1036 return !GetCompilerOptions().IsBootImage(); 1037} 1038 1039bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 1040 if (classes_to_compile_ == nullptr) { 1041 return true; 1042 } 1043 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 1044} 1045 1046bool CompilerDriver::IsMethodToCompile(const MethodReference& method_ref) const { 1047 if (methods_to_compile_ == nullptr) { 1048 return true; 1049 } 1050 1051 std::string tmp = method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1052 return methods_to_compile_->find(tmp.c_str()) != methods_to_compile_->end(); 1053} 1054 1055bool CompilerDriver::ShouldCompileBasedOnProfile(const MethodReference& method_ref) const { 1056 if (profile_compilation_info_ == nullptr) { 1057 // If we miss profile information it means that we don't do a profile guided compilation. 1058 // Return true, and let the other filters decide if the method should be compiled. 1059 return true; 1060 } 1061 bool result = profile_compilation_info_->ContainsMethod(method_ref); 1062 1063 if (kDebugProfileGuidedCompilation) { 1064 LOG(INFO) << "[ProfileGuidedCompilation] " 1065 << (result ? "Compiled" : "Skipped") << " method:" 1066 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1067 } 1068 return result; 1069} 1070 1071class ResolveCatchBlockExceptionsClassVisitor : public ClassVisitor { 1072 public: 1073 explicit ResolveCatchBlockExceptionsClassVisitor( 1074 std::set<std::pair<dex::TypeIndex, const DexFile*>>& exceptions_to_resolve) 1075 : exceptions_to_resolve_(exceptions_to_resolve) {} 1076 1077 virtual bool operator()(ObjPtr<mirror::Class> c) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1078 const auto pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1079 for (auto& m : c->GetMethods(pointer_size)) { 1080 ResolveExceptionsForMethod(&m); 1081 } 1082 return true; 1083 } 1084 1085 private: 1086 void ResolveExceptionsForMethod(ArtMethod* method_handle) 1087 REQUIRES_SHARED(Locks::mutator_lock_) { 1088 const DexFile::CodeItem* code_item = method_handle->GetCodeItem(); 1089 if (code_item == nullptr) { 1090 return; // native or abstract method 1091 } 1092 if (code_item->tries_size_ == 0) { 1093 return; // nothing to process 1094 } 1095 const uint8_t* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 1096 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 1097 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 1098 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 1099 bool has_catch_all = false; 1100 if (encoded_catch_handler_size <= 0) { 1101 encoded_catch_handler_size = -encoded_catch_handler_size; 1102 has_catch_all = true; 1103 } 1104 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 1105 dex::TypeIndex encoded_catch_handler_handlers_type_idx = 1106 dex::TypeIndex(DecodeUnsignedLeb128(&encoded_catch_handler_list)); 1107 // Add to set of types to resolve if not already in the dex cache resolved types 1108 if (!method_handle->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 1109 exceptions_to_resolve_.emplace(encoded_catch_handler_handlers_type_idx, 1110 method_handle->GetDexFile()); 1111 } 1112 // ignore address associated with catch handler 1113 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1114 } 1115 if (has_catch_all) { 1116 // ignore catch all address 1117 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1118 } 1119 } 1120 } 1121 1122 std::set<std::pair<dex::TypeIndex, const DexFile*>>& exceptions_to_resolve_; 1123}; 1124 1125class RecordImageClassesVisitor : public ClassVisitor { 1126 public: 1127 explicit RecordImageClassesVisitor(std::unordered_set<std::string>* image_classes) 1128 : image_classes_(image_classes) {} 1129 1130 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1131 std::string temp; 1132 image_classes_->insert(klass->GetDescriptor(&temp)); 1133 return true; 1134 } 1135 1136 private: 1137 std::unordered_set<std::string>* const image_classes_; 1138}; 1139 1140// Make a list of descriptors for classes to include in the image 1141void CompilerDriver::LoadImageClasses(TimingLogger* timings) { 1142 CHECK(timings != nullptr); 1143 if (!GetCompilerOptions().IsBootImage()) { 1144 return; 1145 } 1146 1147 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 1148 // Make a first class to load all classes explicitly listed in the file 1149 Thread* self = Thread::Current(); 1150 ScopedObjectAccess soa(self); 1151 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1152 CHECK(image_classes_.get() != nullptr); 1153 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 1154 const std::string& descriptor(*it); 1155 StackHandleScope<1> hs(self); 1156 Handle<mirror::Class> klass( 1157 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 1158 if (klass.Get() == nullptr) { 1159 VLOG(compiler) << "Failed to find class " << descriptor; 1160 image_classes_->erase(it++); 1161 self->ClearException(); 1162 } else { 1163 ++it; 1164 } 1165 } 1166 1167 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 1168 // exceptions are resolved by the verifier when there is a catch block in an interested method. 1169 // Do this here so that exception classes appear to have been specified image classes. 1170 std::set<std::pair<dex::TypeIndex, const DexFile*>> unresolved_exception_types; 1171 StackHandleScope<1> hs(self); 1172 Handle<mirror::Class> java_lang_Throwable( 1173 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 1174 do { 1175 unresolved_exception_types.clear(); 1176 ResolveCatchBlockExceptionsClassVisitor visitor(unresolved_exception_types); 1177 class_linker->VisitClasses(&visitor); 1178 for (const auto& exception_type : unresolved_exception_types) { 1179 dex::TypeIndex exception_type_idx = exception_type.first; 1180 const DexFile* dex_file = exception_type.second; 1181 StackHandleScope<2> hs2(self); 1182 Handle<mirror::DexCache> dex_cache(hs2.NewHandle(class_linker->RegisterDexFile(*dex_file, 1183 nullptr))); 1184 Handle<mirror::Class> klass(hs2.NewHandle( 1185 (dex_cache.Get() != nullptr) 1186 ? class_linker->ResolveType(*dex_file, 1187 exception_type_idx, 1188 dex_cache, 1189 ScopedNullHandle<mirror::ClassLoader>()) 1190 : nullptr)); 1191 if (klass.Get() == nullptr) { 1192 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 1193 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 1194 LOG(FATAL) << "Failed to resolve class " << descriptor; 1195 } 1196 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 1197 } 1198 // Resolving exceptions may load classes that reference more exceptions, iterate until no 1199 // more are found 1200 } while (!unresolved_exception_types.empty()); 1201 1202 // We walk the roots looking for classes so that we'll pick up the 1203 // above classes plus any classes them depend on such super 1204 // classes, interfaces, and the required ClassLinker roots. 1205 RecordImageClassesVisitor visitor(image_classes_.get()); 1206 class_linker->VisitClasses(&visitor); 1207 1208 CHECK_NE(image_classes_->size(), 0U); 1209} 1210 1211static void MaybeAddToImageClasses(Thread* self, 1212 ObjPtr<mirror::Class> klass, 1213 std::unordered_set<std::string>* image_classes) 1214 REQUIRES_SHARED(Locks::mutator_lock_) { 1215 DCHECK_EQ(self, Thread::Current()); 1216 StackHandleScope<1> hs(self); 1217 std::string temp; 1218 const PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1219 while (!klass->IsObjectClass()) { 1220 const char* descriptor = klass->GetDescriptor(&temp); 1221 std::pair<std::unordered_set<std::string>::iterator, bool> result = 1222 image_classes->insert(descriptor); 1223 if (!result.second) { // Previously inserted. 1224 break; 1225 } 1226 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 1227 for (size_t i = 0, num_interfaces = klass->NumDirectInterfaces(); i != num_interfaces; ++i) { 1228 ObjPtr<mirror::Class> interface = mirror::Class::GetDirectInterface(self, klass, i); 1229 DCHECK(interface != nullptr); 1230 MaybeAddToImageClasses(self, interface, image_classes); 1231 } 1232 for (auto& m : klass->GetVirtualMethods(pointer_size)) { 1233 MaybeAddToImageClasses(self, m.GetDeclaringClass(), image_classes); 1234 } 1235 if (klass->IsArrayClass()) { 1236 MaybeAddToImageClasses(self, klass->GetComponentType(), image_classes); 1237 } 1238 klass.Assign(klass->GetSuperClass()); 1239 } 1240} 1241 1242// Keeps all the data for the update together. Also doubles as the reference visitor. 1243// Note: we can use object pointers because we suspend all threads. 1244class ClinitImageUpdate { 1245 public: 1246 static ClinitImageUpdate* Create(VariableSizedHandleScope& hs, 1247 std::unordered_set<std::string>* image_class_descriptors, 1248 Thread* self, 1249 ClassLinker* linker) { 1250 std::unique_ptr<ClinitImageUpdate> res(new ClinitImageUpdate(hs, 1251 image_class_descriptors, 1252 self, 1253 linker)); 1254 return res.release(); 1255 } 1256 1257 ~ClinitImageUpdate() { 1258 // Allow others to suspend again. 1259 self_->EndAssertNoThreadSuspension(old_cause_); 1260 } 1261 1262 // Visitor for VisitReferences. 1263 void operator()(ObjPtr<mirror::Object> object, 1264 MemberOffset field_offset, 1265 bool /* is_static */) const 1266 REQUIRES_SHARED(Locks::mutator_lock_) { 1267 mirror::Object* ref = object->GetFieldObject<mirror::Object>(field_offset); 1268 if (ref != nullptr) { 1269 VisitClinitClassesObject(ref); 1270 } 1271 } 1272 1273 // java.lang.ref.Reference visitor for VisitReferences. 1274 void operator()(ObjPtr<mirror::Class> klass ATTRIBUTE_UNUSED, 1275 ObjPtr<mirror::Reference> ref ATTRIBUTE_UNUSED) const {} 1276 1277 // Ignore class native roots. 1278 void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) 1279 const {} 1280 void VisitRoot(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) const {} 1281 1282 void Walk() REQUIRES_SHARED(Locks::mutator_lock_) { 1283 // Use the initial classes as roots for a search. 1284 for (Handle<mirror::Class> klass_root : image_classes_) { 1285 VisitClinitClassesObject(klass_root.Get()); 1286 } 1287 Thread* self = Thread::Current(); 1288 ScopedAssertNoThreadSuspension ants(__FUNCTION__); 1289 for (Handle<mirror::Class> h_klass : to_insert_) { 1290 MaybeAddToImageClasses(self, h_klass.Get(), image_class_descriptors_); 1291 } 1292 } 1293 1294 private: 1295 class FindImageClassesVisitor : public ClassVisitor { 1296 public: 1297 explicit FindImageClassesVisitor(VariableSizedHandleScope& hs, 1298 ClinitImageUpdate* data) 1299 : data_(data), 1300 hs_(hs) {} 1301 1302 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1303 std::string temp; 1304 const char* name = klass->GetDescriptor(&temp); 1305 if (data_->image_class_descriptors_->find(name) != data_->image_class_descriptors_->end()) { 1306 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1307 } else { 1308 // Check whether it is initialized and has a clinit. They must be kept, too. 1309 if (klass->IsInitialized() && klass->FindClassInitializer( 1310 Runtime::Current()->GetClassLinker()->GetImagePointerSize()) != nullptr) { 1311 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1312 } 1313 } 1314 return true; 1315 } 1316 1317 private: 1318 ClinitImageUpdate* const data_; 1319 VariableSizedHandleScope& hs_; 1320 }; 1321 1322 ClinitImageUpdate(VariableSizedHandleScope& hs, 1323 std::unordered_set<std::string>* image_class_descriptors, 1324 Thread* self, 1325 ClassLinker* linker) REQUIRES_SHARED(Locks::mutator_lock_) 1326 : hs_(hs), 1327 image_class_descriptors_(image_class_descriptors), 1328 self_(self) { 1329 CHECK(linker != nullptr); 1330 CHECK(image_class_descriptors != nullptr); 1331 1332 // Make sure nobody interferes with us. 1333 old_cause_ = self->StartAssertNoThreadSuspension("Boot image closure"); 1334 1335 // Find all the already-marked classes. 1336 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1337 FindImageClassesVisitor visitor(hs_, this); 1338 linker->VisitClasses(&visitor); 1339 } 1340 1341 void VisitClinitClassesObject(mirror::Object* object) const 1342 REQUIRES_SHARED(Locks::mutator_lock_) { 1343 DCHECK(object != nullptr); 1344 if (marked_objects_.find(object) != marked_objects_.end()) { 1345 // Already processed. 1346 return; 1347 } 1348 1349 // Mark it. 1350 marked_objects_.insert(object); 1351 1352 if (object->IsClass()) { 1353 // Add to the TODO list since MaybeAddToImageClasses may cause thread suspension. Thread 1354 // suspensionb is not safe to do in VisitObjects or VisitReferences. 1355 to_insert_.push_back(hs_.NewHandle(object->AsClass())); 1356 } else { 1357 // Else visit the object's class. 1358 VisitClinitClassesObject(object->GetClass()); 1359 } 1360 1361 // If it is not a DexCache, visit all references. 1362 if (!object->IsDexCache()) { 1363 object->VisitReferences(*this, *this); 1364 } 1365 } 1366 1367 VariableSizedHandleScope& hs_; 1368 mutable std::vector<Handle<mirror::Class>> to_insert_; 1369 mutable std::unordered_set<mirror::Object*> marked_objects_; 1370 std::unordered_set<std::string>* const image_class_descriptors_; 1371 std::vector<Handle<mirror::Class>> image_classes_; 1372 Thread* const self_; 1373 const char* old_cause_; 1374 1375 DISALLOW_COPY_AND_ASSIGN(ClinitImageUpdate); 1376}; 1377 1378void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 1379 if (GetCompilerOptions().IsBootImage()) { 1380 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 1381 1382 Runtime* runtime = Runtime::Current(); 1383 1384 // Suspend all threads. 1385 ScopedSuspendAll ssa(__FUNCTION__); 1386 1387 VariableSizedHandleScope hs(Thread::Current()); 1388 std::string error_msg; 1389 std::unique_ptr<ClinitImageUpdate> update(ClinitImageUpdate::Create(hs, 1390 image_classes_.get(), 1391 Thread::Current(), 1392 runtime->GetClassLinker())); 1393 1394 // Do the marking. 1395 update->Walk(); 1396 } 1397} 1398 1399bool CompilerDriver::CanAssumeClassIsLoaded(mirror::Class* klass) { 1400 Runtime* runtime = Runtime::Current(); 1401 if (!runtime->IsAotCompiler()) { 1402 DCHECK(runtime->UseJitCompilation()); 1403 // Having the klass reference here implies that the klass is already loaded. 1404 return true; 1405 } 1406 if (!GetCompilerOptions().IsBootImage()) { 1407 // Assume loaded only if klass is in the boot image. App classes cannot be assumed 1408 // loaded because we don't even know what class loader will be used to load them. 1409 bool class_in_image = runtime->GetHeap()->FindSpaceFromObject(klass, false)->IsImageSpace(); 1410 return class_in_image; 1411 } 1412 std::string temp; 1413 const char* descriptor = klass->GetDescriptor(&temp); 1414 return IsImageClass(descriptor); 1415} 1416 1417void CompilerDriver::MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref) { 1418 MutexLock lock(self, dex_to_dex_references_lock_); 1419 // Since we're compiling one dex file at a time, we need to look for the 1420 // current dex file entry only at the end of dex_to_dex_references_. 1421 if (dex_to_dex_references_.empty() || 1422 &dex_to_dex_references_.back().GetDexFile() != method_ref.dex_file) { 1423 dex_to_dex_references_.emplace_back(*method_ref.dex_file); 1424 } 1425 dex_to_dex_references_.back().GetMethodIndexes().SetBit(method_ref.dex_method_index); 1426} 1427 1428bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, 1429 Handle<mirror::DexCache> dex_cache, 1430 dex::TypeIndex type_idx) { 1431 // Get type from dex cache assuming it was populated by the verifier 1432 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1433 if (resolved_class == nullptr) { 1434 stats_->TypeNeedsAccessCheck(); 1435 return false; // Unknown class needs access checks. 1436 } 1437 const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(referrer_idx); 1438 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1439 if (!is_accessible) { 1440 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 1441 if (referrer_class == nullptr) { 1442 stats_->TypeNeedsAccessCheck(); 1443 return false; // Incomplete referrer knowledge needs access check. 1444 } 1445 // Perform access check, will return true if access is ok or false if we're going to have to 1446 // check this at runtime (for example for class loaders). 1447 is_accessible = referrer_class->CanAccess(resolved_class); 1448 } 1449 if (is_accessible) { 1450 stats_->TypeDoesntNeedAccessCheck(); 1451 } else { 1452 stats_->TypeNeedsAccessCheck(); 1453 } 1454 return is_accessible; 1455} 1456 1457bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 1458 Handle<mirror::DexCache> dex_cache, 1459 dex::TypeIndex type_idx, 1460 bool* finalizable) { 1461 // Get type from dex cache assuming it was populated by the verifier. 1462 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1463 if (resolved_class == nullptr) { 1464 stats_->TypeNeedsAccessCheck(); 1465 // Be conservative. 1466 *finalizable = true; 1467 return false; // Unknown class needs access checks. 1468 } 1469 *finalizable = resolved_class->IsFinalizable(); 1470 const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(referrer_idx); 1471 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1472 if (!is_accessible) { 1473 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 1474 if (referrer_class == nullptr) { 1475 stats_->TypeNeedsAccessCheck(); 1476 return false; // Incomplete referrer knowledge needs access check. 1477 } 1478 // Perform access and instantiable checks, will return true if access is ok or false if we're 1479 // going to have to check this at runtime (for example for class loaders). 1480 is_accessible = referrer_class->CanAccess(resolved_class); 1481 } 1482 bool result = is_accessible && resolved_class->IsInstantiable(); 1483 if (result) { 1484 stats_->TypeDoesntNeedAccessCheck(); 1485 } else { 1486 stats_->TypeNeedsAccessCheck(); 1487 } 1488 return result; 1489} 1490 1491void CompilerDriver::ProcessedInstanceField(bool resolved) { 1492 if (!resolved) { 1493 stats_->UnresolvedInstanceField(); 1494 } else { 1495 stats_->ResolvedInstanceField(); 1496 } 1497} 1498 1499void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1500 if (!resolved) { 1501 stats_->UnresolvedStaticField(); 1502 } else if (local) { 1503 stats_->ResolvedLocalStaticField(); 1504 } else { 1505 stats_->ResolvedStaticField(); 1506 } 1507} 1508 1509ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1510 const DexCompilationUnit* mUnit, bool is_put, 1511 const ScopedObjectAccess& soa) { 1512 // Try to resolve the field and compiling method's class. 1513 ArtField* resolved_field; 1514 mirror::Class* referrer_class; 1515 Handle<mirror::DexCache> dex_cache(mUnit->GetDexCache()); 1516 { 1517 StackHandleScope<1> hs(soa.Self()); 1518 Handle<mirror::ClassLoader> class_loader_handle( 1519 hs.NewHandle(soa.Decode<mirror::ClassLoader>(mUnit->GetClassLoader()))); 1520 resolved_field = ResolveField(soa, dex_cache, class_loader_handle, mUnit, field_idx, false); 1521 referrer_class = resolved_field != nullptr 1522 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader_handle, mUnit) : nullptr; 1523 } 1524 bool can_link = false; 1525 if (resolved_field != nullptr && referrer_class != nullptr) { 1526 std::pair<bool, bool> fast_path = IsFastInstanceField( 1527 dex_cache.Get(), referrer_class, resolved_field, field_idx); 1528 can_link = is_put ? fast_path.second : fast_path.first; 1529 } 1530 ProcessedInstanceField(can_link); 1531 return can_link ? resolved_field : nullptr; 1532} 1533 1534bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1535 bool is_put, MemberOffset* field_offset, 1536 bool* is_volatile) { 1537 ScopedObjectAccess soa(Thread::Current()); 1538 ArtField* resolved_field = ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa); 1539 1540 if (resolved_field == nullptr) { 1541 // Conservative defaults. 1542 *is_volatile = true; 1543 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1544 return false; 1545 } else { 1546 *is_volatile = resolved_field->IsVolatile(); 1547 *field_offset = resolved_field->GetOffset(); 1548 return true; 1549 } 1550} 1551 1552const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1553 uint32_t method_idx) const { 1554 MethodReference ref(dex_file, method_idx); 1555 return verification_results_->GetVerifiedMethod(ref); 1556} 1557 1558bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1559 if (!compiler_options_->IsVerificationEnabled()) { 1560 // If we didn't verify, every cast has to be treated as non-safe. 1561 return false; 1562 } 1563 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1564 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1565 if (result) { 1566 stats_->SafeCast(); 1567 } else { 1568 stats_->NotASafeCast(); 1569 } 1570 return result; 1571} 1572 1573class CompilationVisitor { 1574 public: 1575 virtual ~CompilationVisitor() {} 1576 virtual void Visit(size_t index) = 0; 1577}; 1578 1579class ParallelCompilationManager { 1580 public: 1581 ParallelCompilationManager(ClassLinker* class_linker, 1582 jobject class_loader, 1583 CompilerDriver* compiler, 1584 const DexFile* dex_file, 1585 const std::vector<const DexFile*>& dex_files, 1586 ThreadPool* thread_pool) 1587 : index_(0), 1588 class_linker_(class_linker), 1589 class_loader_(class_loader), 1590 compiler_(compiler), 1591 dex_file_(dex_file), 1592 dex_files_(dex_files), 1593 thread_pool_(thread_pool) {} 1594 1595 ClassLinker* GetClassLinker() const { 1596 CHECK(class_linker_ != nullptr); 1597 return class_linker_; 1598 } 1599 1600 jobject GetClassLoader() const { 1601 return class_loader_; 1602 } 1603 1604 CompilerDriver* GetCompiler() const { 1605 CHECK(compiler_ != nullptr); 1606 return compiler_; 1607 } 1608 1609 const DexFile* GetDexFile() const { 1610 CHECK(dex_file_ != nullptr); 1611 return dex_file_; 1612 } 1613 1614 const std::vector<const DexFile*>& GetDexFiles() const { 1615 return dex_files_; 1616 } 1617 1618 void ForAll(size_t begin, size_t end, CompilationVisitor* visitor, size_t work_units) 1619 REQUIRES(!*Locks::mutator_lock_) { 1620 Thread* self = Thread::Current(); 1621 self->AssertNoPendingException(); 1622 CHECK_GT(work_units, 0U); 1623 1624 index_.StoreRelaxed(begin); 1625 for (size_t i = 0; i < work_units; ++i) { 1626 thread_pool_->AddTask(self, new ForAllClosure(this, end, visitor)); 1627 } 1628 thread_pool_->StartWorkers(self); 1629 1630 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1631 // thread destructor's called below perform join). 1632 CHECK_NE(self->GetState(), kRunnable); 1633 1634 // Wait for all the worker threads to finish. 1635 thread_pool_->Wait(self, true, false); 1636 1637 // And stop the workers accepting jobs. 1638 thread_pool_->StopWorkers(self); 1639 } 1640 1641 size_t NextIndex() { 1642 return index_.FetchAndAddSequentiallyConsistent(1); 1643 } 1644 1645 private: 1646 class ForAllClosure : public Task { 1647 public: 1648 ForAllClosure(ParallelCompilationManager* manager, size_t end, CompilationVisitor* visitor) 1649 : manager_(manager), 1650 end_(end), 1651 visitor_(visitor) {} 1652 1653 virtual void Run(Thread* self) { 1654 while (true) { 1655 const size_t index = manager_->NextIndex(); 1656 if (UNLIKELY(index >= end_)) { 1657 break; 1658 } 1659 visitor_->Visit(index); 1660 self->AssertNoPendingException(); 1661 } 1662 } 1663 1664 virtual void Finalize() { 1665 delete this; 1666 } 1667 1668 private: 1669 ParallelCompilationManager* const manager_; 1670 const size_t end_; 1671 CompilationVisitor* const visitor_; 1672 }; 1673 1674 AtomicInteger index_; 1675 ClassLinker* const class_linker_; 1676 const jobject class_loader_; 1677 CompilerDriver* const compiler_; 1678 const DexFile* const dex_file_; 1679 const std::vector<const DexFile*>& dex_files_; 1680 ThreadPool* const thread_pool_; 1681 1682 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1683}; 1684 1685// A fast version of SkipClass above if the class pointer is available 1686// that avoids the expensive FindInClassPath search. 1687static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1688 REQUIRES_SHARED(Locks::mutator_lock_) { 1689 DCHECK(klass != nullptr); 1690 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1691 if (&dex_file != &original_dex_file) { 1692 if (class_loader == nullptr) { 1693 LOG(WARNING) << "Skipping class " << klass->PrettyDescriptor() << " from " 1694 << dex_file.GetLocation() << " previously found in " 1695 << original_dex_file.GetLocation(); 1696 } 1697 return true; 1698 } 1699 return false; 1700} 1701 1702static void CheckAndClearResolveException(Thread* self) 1703 REQUIRES_SHARED(Locks::mutator_lock_) { 1704 CHECK(self->IsExceptionPending()); 1705 mirror::Throwable* exception = self->GetException(); 1706 std::string temp; 1707 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1708 const char* expected_exceptions[] = { 1709 "Ljava/lang/IllegalAccessError;", 1710 "Ljava/lang/IncompatibleClassChangeError;", 1711 "Ljava/lang/InstantiationError;", 1712 "Ljava/lang/LinkageError;", 1713 "Ljava/lang/NoClassDefFoundError;", 1714 "Ljava/lang/NoSuchFieldError;", 1715 "Ljava/lang/NoSuchMethodError;" 1716 }; 1717 bool found = false; 1718 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1719 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1720 found = true; 1721 } 1722 } 1723 if (!found) { 1724 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1725 } 1726 self->ClearException(); 1727} 1728 1729bool CompilerDriver::RequiresConstructorBarrier(const DexFile& dex_file, 1730 uint16_t class_def_idx) const { 1731 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx); 1732 const uint8_t* class_data = dex_file.GetClassData(class_def); 1733 if (class_data == nullptr) { 1734 // Empty class such as a marker interface. 1735 return false; 1736 } 1737 ClassDataItemIterator it(dex_file, class_data); 1738 while (it.HasNextStaticField()) { 1739 it.Next(); 1740 } 1741 // We require a constructor barrier if there are final instance fields. 1742 while (it.HasNextInstanceField()) { 1743 if (it.MemberIsFinal()) { 1744 return true; 1745 } 1746 it.Next(); 1747 } 1748 return false; 1749} 1750 1751class ResolveClassFieldsAndMethodsVisitor : public CompilationVisitor { 1752 public: 1753 explicit ResolveClassFieldsAndMethodsVisitor(const ParallelCompilationManager* manager) 1754 : manager_(manager) {} 1755 1756 void Visit(size_t class_def_index) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1757 ATRACE_CALL(); 1758 Thread* const self = Thread::Current(); 1759 jobject jclass_loader = manager_->GetClassLoader(); 1760 const DexFile& dex_file = *manager_->GetDexFile(); 1761 ClassLinker* class_linker = manager_->GetClassLinker(); 1762 1763 // If an instance field is final then we need to have a barrier on the return, static final 1764 // fields are assigned within the lock held for class initialization. Conservatively assume 1765 // constructor barriers are always required. 1766 bool requires_constructor_barrier = true; 1767 1768 // Method and Field are the worst. We can't resolve without either 1769 // context from the code use (to disambiguate virtual vs direct 1770 // method and instance vs static field) or from class 1771 // definitions. While the compiler will resolve what it can as it 1772 // needs it, here we try to resolve fields and methods used in class 1773 // definitions, since many of them many never be referenced by 1774 // generated code. 1775 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1776 ScopedObjectAccess soa(self); 1777 StackHandleScope<2> hs(soa.Self()); 1778 Handle<mirror::ClassLoader> class_loader( 1779 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 1780 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 1781 soa.Self(), dex_file))); 1782 // Resolve the class. 1783 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1784 class_loader); 1785 bool resolve_fields_and_methods; 1786 if (klass == nullptr) { 1787 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1788 // attempt to resolve methods and fields when there is no declaring class. 1789 CheckAndClearResolveException(soa.Self()); 1790 resolve_fields_and_methods = false; 1791 } else { 1792 // We successfully resolved a class, should we skip it? 1793 if (SkipClass(jclass_loader, dex_file, klass)) { 1794 return; 1795 } 1796 // We want to resolve the methods and fields eagerly. 1797 resolve_fields_and_methods = true; 1798 } 1799 // Note the class_data pointer advances through the headers, 1800 // static fields, instance fields, direct methods, and virtual 1801 // methods. 1802 const uint8_t* class_data = dex_file.GetClassData(class_def); 1803 if (class_data == nullptr) { 1804 // Empty class such as a marker interface. 1805 requires_constructor_barrier = false; 1806 } else { 1807 ClassDataItemIterator it(dex_file, class_data); 1808 while (it.HasNextStaticField()) { 1809 if (resolve_fields_and_methods) { 1810 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1811 dex_cache, class_loader, true); 1812 if (field == nullptr) { 1813 CheckAndClearResolveException(soa.Self()); 1814 } 1815 } 1816 it.Next(); 1817 } 1818 // We require a constructor barrier if there are final instance fields. 1819 requires_constructor_barrier = false; 1820 while (it.HasNextInstanceField()) { 1821 if (it.MemberIsFinal()) { 1822 requires_constructor_barrier = true; 1823 } 1824 if (resolve_fields_and_methods) { 1825 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1826 dex_cache, class_loader, false); 1827 if (field == nullptr) { 1828 CheckAndClearResolveException(soa.Self()); 1829 } 1830 } 1831 it.Next(); 1832 } 1833 if (resolve_fields_and_methods) { 1834 while (it.HasNextDirectMethod()) { 1835 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1836 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1837 it.GetMethodInvokeType(class_def)); 1838 if (method == nullptr) { 1839 CheckAndClearResolveException(soa.Self()); 1840 } 1841 it.Next(); 1842 } 1843 while (it.HasNextVirtualMethod()) { 1844 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1845 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1846 it.GetMethodInvokeType(class_def)); 1847 if (method == nullptr) { 1848 CheckAndClearResolveException(soa.Self()); 1849 } 1850 it.Next(); 1851 } 1852 DCHECK(!it.HasNext()); 1853 } 1854 } 1855 manager_->GetCompiler()->SetRequiresConstructorBarrier(self, 1856 &dex_file, 1857 class_def_index, 1858 requires_constructor_barrier); 1859 } 1860 1861 private: 1862 const ParallelCompilationManager* const manager_; 1863}; 1864 1865class ResolveTypeVisitor : public CompilationVisitor { 1866 public: 1867 explicit ResolveTypeVisitor(const ParallelCompilationManager* manager) : manager_(manager) { 1868 } 1869 void Visit(size_t type_idx) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1870 // Class derived values are more complicated, they require the linker and loader. 1871 ScopedObjectAccess soa(Thread::Current()); 1872 ClassLinker* class_linker = manager_->GetClassLinker(); 1873 const DexFile& dex_file = *manager_->GetDexFile(); 1874 StackHandleScope<2> hs(soa.Self()); 1875 Handle<mirror::ClassLoader> class_loader( 1876 hs.NewHandle(soa.Decode<mirror::ClassLoader>(manager_->GetClassLoader()))); 1877 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->RegisterDexFile( 1878 dex_file, 1879 class_loader.Get()))); 1880 ObjPtr<mirror::Class> klass = (dex_cache.Get() != nullptr) 1881 ? class_linker->ResolveType(dex_file, dex::TypeIndex(type_idx), dex_cache, class_loader) 1882 : nullptr; 1883 1884 if (klass == nullptr) { 1885 soa.Self()->AssertPendingException(); 1886 mirror::Throwable* exception = soa.Self()->GetException(); 1887 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1888 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 1889 // There's little point continuing compilation if the heap is exhausted. 1890 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1891 } 1892 soa.Self()->ClearException(); 1893 } 1894 } 1895 1896 private: 1897 const ParallelCompilationManager* const manager_; 1898}; 1899 1900void CompilerDriver::ResolveDexFile(jobject class_loader, 1901 const DexFile& dex_file, 1902 const std::vector<const DexFile*>& dex_files, 1903 ThreadPool* thread_pool, 1904 size_t thread_count, 1905 TimingLogger* timings) { 1906 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1907 1908 // TODO: we could resolve strings here, although the string table is largely filled with class 1909 // and method names. 1910 1911 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1912 thread_pool); 1913 if (GetCompilerOptions().IsBootImage()) { 1914 // For images we resolve all types, such as array, whereas for applications just those with 1915 // classdefs are resolved by ResolveClassFieldsAndMethods. 1916 TimingLogger::ScopedTiming t("Resolve Types", timings); 1917 ResolveTypeVisitor visitor(&context); 1918 context.ForAll(0, dex_file.NumTypeIds(), &visitor, thread_count); 1919 } 1920 1921 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 1922 ResolveClassFieldsAndMethodsVisitor visitor(&context); 1923 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 1924} 1925 1926void CompilerDriver::SetVerified(jobject class_loader, 1927 const std::vector<const DexFile*>& dex_files, 1928 TimingLogger* timings) { 1929 // This can be run in parallel. 1930 for (const DexFile* dex_file : dex_files) { 1931 CHECK(dex_file != nullptr); 1932 SetVerifiedDexFile(class_loader, 1933 *dex_file, 1934 dex_files, 1935 parallel_thread_pool_.get(), 1936 parallel_thread_count_, 1937 timings); 1938 } 1939} 1940 1941static void PopulateVerifiedMethods(const DexFile& dex_file, 1942 uint32_t class_def_index, 1943 VerificationResults* verification_results) { 1944 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1945 const uint8_t* class_data = dex_file.GetClassData(class_def); 1946 if (class_data == nullptr) { 1947 return; 1948 } 1949 ClassDataItemIterator it(dex_file, class_data); 1950 // Skip fields 1951 while (it.HasNextStaticField()) { 1952 it.Next(); 1953 } 1954 while (it.HasNextInstanceField()) { 1955 it.Next(); 1956 } 1957 1958 while (it.HasNextDirectMethod()) { 1959 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1960 it.Next(); 1961 } 1962 1963 while (it.HasNextVirtualMethod()) { 1964 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1965 it.Next(); 1966 } 1967 DCHECK(!it.HasNext()); 1968} 1969 1970static void LoadAndUpdateStatus(const DexFile& dex_file, 1971 const DexFile::ClassDef& class_def, 1972 mirror::Class::Status status, 1973 Handle<mirror::ClassLoader> class_loader, 1974 Thread* self) 1975 REQUIRES_SHARED(Locks::mutator_lock_) { 1976 StackHandleScope<1> hs(self); 1977 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1978 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1979 Handle<mirror::Class> cls(hs.NewHandle<mirror::Class>( 1980 class_linker->FindClass(self, descriptor, class_loader))); 1981 if (cls.Get() != nullptr) { 1982 // Check that the class is resolved with the current dex file. We might get 1983 // a boot image class, or a class in a different dex file for multidex, and 1984 // we should not update the status in that case. 1985 if (&cls->GetDexFile() == &dex_file) { 1986 ObjectLock<mirror::Class> lock(self, cls); 1987 mirror::Class::SetStatus(cls, status, self); 1988 } 1989 } else { 1990 DCHECK(self->IsExceptionPending()); 1991 self->ClearException(); 1992 } 1993} 1994 1995bool CompilerDriver::FastVerify(jobject jclass_loader, 1996 const std::vector<const DexFile*>& dex_files, 1997 TimingLogger* timings) { 1998 verifier::VerifierDeps* verifier_deps = 1999 Runtime::Current()->GetCompilerCallbacks()->GetVerifierDeps(); 2000 // If there is an existing `VerifierDeps`, try to use it for fast verification. 2001 if (verifier_deps == nullptr) { 2002 return false; 2003 } 2004 TimingLogger::ScopedTiming t("Fast Verify", timings); 2005 ScopedObjectAccess soa(Thread::Current()); 2006 StackHandleScope<2> hs(soa.Self()); 2007 Handle<mirror::ClassLoader> class_loader( 2008 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2009 if (!verifier_deps->ValidateDependencies(class_loader, soa.Self())) { 2010 return false; 2011 } 2012 2013 bool compiler_only_verifies = !GetCompilerOptions().IsAnyMethodCompilationEnabled(); 2014 2015 // We successfully validated the dependencies, now update class status 2016 // of verified classes. Note that the dependencies also record which classes 2017 // could not be fully verified; we could try again, but that would hurt verification 2018 // time. So instead we assume these classes still need to be verified at 2019 // runtime. 2020 for (const DexFile* dex_file : dex_files) { 2021 // Fetch the list of unverified classes and turn it into a set for faster 2022 // lookups. 2023 const std::vector<dex::TypeIndex>& unverified_classes = 2024 verifier_deps->GetUnverifiedClasses(*dex_file); 2025 std::set<dex::TypeIndex> set(unverified_classes.begin(), unverified_classes.end()); 2026 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 2027 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 2028 if (set.find(class_def.class_idx_) == set.end()) { 2029 if (compiler_only_verifies) { 2030 // Just update the compiled_classes_ map. The compiler doesn't need to resolve 2031 // the type. 2032 compiled_classes_.Overwrite( 2033 ClassReference(dex_file, i), new CompiledClass(mirror::Class::kStatusVerified)); 2034 } else { 2035 // Update the class status, so later compilation stages know they don't need to verify 2036 // the class. 2037 LoadAndUpdateStatus( 2038 *dex_file, class_def, mirror::Class::kStatusVerified, class_loader, soa.Self()); 2039 // Create `VerifiedMethod`s for each methods, the compiler expects one for 2040 // quickening or compiling. 2041 // Note that this means: 2042 // - We're only going to compile methods that did verify. 2043 // - Quickening will not do checkcast ellision. 2044 // TODO(ngeoffray): Reconsider this once we refactor compiler filters. 2045 PopulateVerifiedMethods(*dex_file, i, verification_results_); 2046 } 2047 } else if (!compiler_only_verifies) { 2048 // Make sure later compilation stages know they should not try to verify 2049 // this class again. 2050 LoadAndUpdateStatus(*dex_file, 2051 class_def, 2052 mirror::Class::kStatusRetryVerificationAtRuntime, 2053 class_loader, 2054 soa.Self()); 2055 } 2056 } 2057 } 2058 return true; 2059} 2060 2061void CompilerDriver::Verify(jobject jclass_loader, 2062 const std::vector<const DexFile*>& dex_files, 2063 TimingLogger* timings) { 2064 if (FastVerify(jclass_loader, dex_files, timings)) { 2065 return; 2066 } 2067 2068 // If there is no existing `verifier_deps` (because of non-existing vdex), or 2069 // the existing `verifier_deps` is not valid anymore, create a new one for 2070 // non boot image compilation. The verifier will need it to record the new dependencies. 2071 // Then dex2oat can update the vdex file with these new dependencies. 2072 if (!GetCompilerOptions().IsBootImage()) { 2073 // Create the main VerifierDeps, and set it to this thread. 2074 verifier::VerifierDeps* verifier_deps = new verifier::VerifierDeps(dex_files); 2075 Runtime::Current()->GetCompilerCallbacks()->SetVerifierDeps(verifier_deps); 2076 Thread::Current()->SetVerifierDeps(verifier_deps); 2077 // Create per-thread VerifierDeps to avoid contention on the main one. 2078 // We will merge them after verification. 2079 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2080 worker->GetThread()->SetVerifierDeps(new verifier::VerifierDeps(dex_files)); 2081 } 2082 } 2083 2084 // Note: verification should not be pulling in classes anymore when compiling the boot image, 2085 // as all should have been resolved before. As such, doing this in parallel should still 2086 // be deterministic. 2087 for (const DexFile* dex_file : dex_files) { 2088 CHECK(dex_file != nullptr); 2089 VerifyDexFile(jclass_loader, 2090 *dex_file, 2091 dex_files, 2092 parallel_thread_pool_.get(), 2093 parallel_thread_count_, 2094 timings); 2095 } 2096 2097 if (!GetCompilerOptions().IsBootImage()) { 2098 // Merge all VerifierDeps into the main one. 2099 verifier::VerifierDeps* verifier_deps = Thread::Current()->GetVerifierDeps(); 2100 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2101 verifier::VerifierDeps* thread_deps = worker->GetThread()->GetVerifierDeps(); 2102 worker->GetThread()->SetVerifierDeps(nullptr); 2103 verifier_deps->MergeWith(*thread_deps, dex_files);; 2104 delete thread_deps; 2105 } 2106 Thread::Current()->SetVerifierDeps(nullptr); 2107 } 2108} 2109 2110class VerifyClassVisitor : public CompilationVisitor { 2111 public: 2112 VerifyClassVisitor(const ParallelCompilationManager* manager, verifier::HardFailLogMode log_level) 2113 : manager_(manager), log_level_(log_level) {} 2114 2115 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2116 ATRACE_CALL(); 2117 ScopedObjectAccess soa(Thread::Current()); 2118 const DexFile& dex_file = *manager_->GetDexFile(); 2119 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2120 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2121 ClassLinker* class_linker = manager_->GetClassLinker(); 2122 jobject jclass_loader = manager_->GetClassLoader(); 2123 StackHandleScope<3> hs(soa.Self()); 2124 Handle<mirror::ClassLoader> class_loader( 2125 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2126 Handle<mirror::Class> klass( 2127 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2128 verifier::MethodVerifier::FailureKind failure_kind; 2129 if (klass.Get() == nullptr) { 2130 CHECK(soa.Self()->IsExceptionPending()); 2131 soa.Self()->ClearException(); 2132 2133 /* 2134 * At compile time, we can still structurally verify the class even if FindClass fails. 2135 * This is to ensure the class is structurally sound for compilation. An unsound class 2136 * will be rejected by the verifier and later skipped during compilation in the compiler. 2137 */ 2138 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 2139 soa.Self(), dex_file))); 2140 std::string error_msg; 2141 failure_kind = 2142 verifier::MethodVerifier::VerifyClass(soa.Self(), 2143 &dex_file, 2144 dex_cache, 2145 class_loader, 2146 class_def, 2147 Runtime::Current()->GetCompilerCallbacks(), 2148 true /* allow soft failures */, 2149 log_level_, 2150 &error_msg); 2151 if (failure_kind == verifier::MethodVerifier::kHardFailure) { 2152 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 2153 << " because: " << error_msg; 2154 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2155 } 2156 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 2157 CHECK(klass->IsResolved()) << klass->PrettyClass(); 2158 failure_kind = class_linker->VerifyClass(soa.Self(), klass, log_level_); 2159 2160 if (klass->IsErroneous()) { 2161 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 2162 CHECK(soa.Self()->IsExceptionPending()); 2163 soa.Self()->ClearException(); 2164 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2165 } 2166 2167 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 2168 << klass->PrettyDescriptor() << ": state=" << klass->GetStatus(); 2169 2170 // It is *very* problematic if there are verification errors in the boot classpath. For example, 2171 // we rely on things working OK without verification when the decryption dialog is brought up. 2172 // So abort in a debug build if we find this violated. 2173 if (kIsDebugBuild) { 2174 // TODO(narayan): Remove this special case for signature polymorphic 2175 // invokes once verifier support is fully implemented. 2176 if (manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2177 !android::base::StartsWith(descriptor, "Ljava/lang/invoke/")) { 2178 DCHECK(klass->IsVerified()) << "Boot classpath class " << klass->PrettyClass() 2179 << " failed to fully verify: state= " << klass->GetStatus(); 2180 } 2181 } 2182 } else { 2183 // Make the skip a soft failure, essentially being considered as verify at runtime. 2184 failure_kind = verifier::MethodVerifier::kSoftFailure; 2185 } 2186 verifier::VerifierDeps::MaybeRecordVerificationStatus( 2187 dex_file, class_def.class_idx_, failure_kind); 2188 soa.Self()->AssertNoPendingException(); 2189 } 2190 2191 private: 2192 const ParallelCompilationManager* const manager_; 2193 const verifier::HardFailLogMode log_level_; 2194}; 2195 2196void CompilerDriver::VerifyDexFile(jobject class_loader, 2197 const DexFile& dex_file, 2198 const std::vector<const DexFile*>& dex_files, 2199 ThreadPool* thread_pool, 2200 size_t thread_count, 2201 TimingLogger* timings) { 2202 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2203 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2204 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2205 thread_pool); 2206 verifier::HardFailLogMode log_level = GetCompilerOptions().AbortOnHardVerifierFailure() 2207 ? verifier::HardFailLogMode::kLogInternalFatal 2208 : verifier::HardFailLogMode::kLogWarning; 2209 VerifyClassVisitor visitor(&context, log_level); 2210 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2211} 2212 2213class SetVerifiedClassVisitor : public CompilationVisitor { 2214 public: 2215 explicit SetVerifiedClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2216 2217 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2218 ATRACE_CALL(); 2219 ScopedObjectAccess soa(Thread::Current()); 2220 const DexFile& dex_file = *manager_->GetDexFile(); 2221 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2222 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2223 ClassLinker* class_linker = manager_->GetClassLinker(); 2224 jobject jclass_loader = manager_->GetClassLoader(); 2225 StackHandleScope<3> hs(soa.Self()); 2226 Handle<mirror::ClassLoader> class_loader( 2227 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2228 Handle<mirror::Class> klass( 2229 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2230 // Class might have failed resolution. Then don't set it to verified. 2231 if (klass.Get() != nullptr) { 2232 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 2233 // very wrong. 2234 if (klass->IsResolved() && !klass->IsErroneousResolved()) { 2235 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 2236 ObjectLock<mirror::Class> lock(soa.Self(), klass); 2237 // Set class status to verified. 2238 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, soa.Self()); 2239 // Mark methods as pre-verified. If we don't do this, the interpreter will run with 2240 // access checks. 2241 klass->SetSkipAccessChecksFlagOnAllMethods( 2242 GetInstructionSetPointerSize(manager_->GetCompiler()->GetInstructionSet())); 2243 klass->SetVerificationAttempted(); 2244 } 2245 // Record the final class status if necessary. 2246 ClassReference ref(manager_->GetDexFile(), class_def_index); 2247 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2248 } 2249 } else { 2250 Thread* self = soa.Self(); 2251 DCHECK(self->IsExceptionPending()); 2252 self->ClearException(); 2253 } 2254 } 2255 2256 private: 2257 const ParallelCompilationManager* const manager_; 2258}; 2259 2260void CompilerDriver::SetVerifiedDexFile(jobject class_loader, 2261 const DexFile& dex_file, 2262 const std::vector<const DexFile*>& dex_files, 2263 ThreadPool* thread_pool, 2264 size_t thread_count, 2265 TimingLogger* timings) { 2266 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2267 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2268 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2269 thread_pool); 2270 SetVerifiedClassVisitor visitor(&context); 2271 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2272} 2273 2274class InitializeClassVisitor : public CompilationVisitor { 2275 public: 2276 explicit InitializeClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2277 2278 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2279 ATRACE_CALL(); 2280 jobject jclass_loader = manager_->GetClassLoader(); 2281 const DexFile& dex_file = *manager_->GetDexFile(); 2282 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2283 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 2284 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 2285 2286 ScopedObjectAccess soa(Thread::Current()); 2287 StackHandleScope<3> hs(soa.Self()); 2288 Handle<mirror::ClassLoader> class_loader( 2289 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2290 Handle<mirror::Class> klass( 2291 hs.NewHandle(manager_->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 2292 2293 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 2294 // Only try to initialize classes that were successfully verified. 2295 if (klass->IsVerified()) { 2296 // Attempt to initialize the class but bail if we either need to initialize the super-class 2297 // or static fields. 2298 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, false); 2299 if (!klass->IsInitialized()) { 2300 // We don't want non-trivial class initialization occurring on multiple threads due to 2301 // deadlock problems. For example, a parent class is initialized (holding its lock) that 2302 // refers to a sub-class in its static/class initializer causing it to try to acquire the 2303 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 2304 // after first initializing its parents, whose locks are acquired. This leads to a 2305 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 2306 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 2307 // than use a special Object for the purpose we use the Class of java.lang.Class. 2308 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 2309 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 2310 // Attempt to initialize allowing initialization of parent classes but still not static 2311 // fields. 2312 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, true); 2313 if (!klass->IsInitialized()) { 2314 // We need to initialize static fields, we only do this for image classes that aren't 2315 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 2316 bool can_init_static_fields = 2317 manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2318 manager_->GetCompiler()->IsImageClass(descriptor) && 2319 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 2320 if (can_init_static_fields) { 2321 VLOG(compiler) << "Initializing: " << descriptor; 2322 // TODO multithreading support. We should ensure the current compilation thread has 2323 // exclusive access to the runtime and the transaction. To achieve this, we could use 2324 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 2325 // checks in Thread::AssertThreadSuspensionIsAllowable. 2326 Runtime* const runtime = Runtime::Current(); 2327 Transaction transaction; 2328 2329 // Run the class initializer in transaction mode. 2330 runtime->EnterTransactionMode(&transaction); 2331 const mirror::Class::Status old_status = klass->GetStatus(); 2332 bool success = manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, true, 2333 true); 2334 // TODO we detach transaction from runtime to indicate we quit the transactional 2335 // mode which prevents the GC from visiting objects modified during the transaction. 2336 // Ensure GC is not run so don't access freed objects when aborting transaction. 2337 2338 ScopedAssertNoThreadSuspension ants("Transaction end"); 2339 runtime->ExitTransactionMode(); 2340 2341 if (!success) { 2342 CHECK(soa.Self()->IsExceptionPending()); 2343 mirror::Throwable* exception = soa.Self()->GetException(); 2344 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 2345 << exception->Dump(); 2346 std::ostream* file_log = manager_->GetCompiler()-> 2347 GetCompilerOptions().GetInitFailureOutput(); 2348 if (file_log != nullptr) { 2349 *file_log << descriptor << "\n"; 2350 *file_log << exception->Dump() << "\n"; 2351 } 2352 soa.Self()->ClearException(); 2353 transaction.Rollback(); 2354 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 2355 } 2356 } 2357 } 2358 soa.Self()->AssertNoPendingException(); 2359 } 2360 } 2361 // Record the final class status if necessary. 2362 ClassReference ref(manager_->GetDexFile(), class_def_index); 2363 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2364 } 2365 // Clear any class not found or verification exceptions. 2366 soa.Self()->ClearException(); 2367 } 2368 2369 private: 2370 const ParallelCompilationManager* const manager_; 2371}; 2372 2373void CompilerDriver::InitializeClasses(jobject jni_class_loader, 2374 const DexFile& dex_file, 2375 const std::vector<const DexFile*>& dex_files, 2376 TimingLogger* timings) { 2377 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 2378 2379 // Initialization allocates objects and needs to run single-threaded to be deterministic. 2380 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 2381 ThreadPool* init_thread_pool = force_determinism 2382 ? single_thread_pool_.get() 2383 : parallel_thread_pool_.get(); 2384 size_t init_thread_count = force_determinism ? 1U : parallel_thread_count_; 2385 2386 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2387 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 2388 init_thread_pool); 2389 if (GetCompilerOptions().IsBootImage()) { 2390 // TODO: remove this when transactional mode supports multithreading. 2391 init_thread_count = 1U; 2392 } 2393 InitializeClassVisitor visitor(&context); 2394 context.ForAll(0, dex_file.NumClassDefs(), &visitor, init_thread_count); 2395} 2396 2397class InitializeArrayClassesAndCreateConflictTablesVisitor : public ClassVisitor { 2398 public: 2399 explicit InitializeArrayClassesAndCreateConflictTablesVisitor(VariableSizedHandleScope& hs) 2400 : hs_(hs) {} 2401 2402 virtual bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE 2403 REQUIRES_SHARED(Locks::mutator_lock_) { 2404 if (Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(klass)) { 2405 return true; 2406 } 2407 if (klass->IsArrayClass()) { 2408 StackHandleScope<1> hs(Thread::Current()); 2409 auto h_klass = hs.NewHandleWrapper(&klass); 2410 Runtime::Current()->GetClassLinker()->EnsureInitialized(hs.Self(), h_klass, true, true); 2411 } 2412 // Collect handles since there may be thread suspension in future EnsureInitialized. 2413 to_visit_.push_back(hs_.NewHandle(klass)); 2414 return true; 2415 } 2416 2417 void FillAllIMTAndConflictTables() REQUIRES_SHARED(Locks::mutator_lock_) { 2418 for (Handle<mirror::Class> c : to_visit_) { 2419 // Create the conflict tables. 2420 FillIMTAndConflictTables(c.Get()); 2421 } 2422 } 2423 2424 private: 2425 void FillIMTAndConflictTables(ObjPtr<mirror::Class> klass) 2426 REQUIRES_SHARED(Locks::mutator_lock_) { 2427 if (!klass->ShouldHaveImt()) { 2428 return; 2429 } 2430 if (visited_classes_.find(klass) != visited_classes_.end()) { 2431 return; 2432 } 2433 if (klass->HasSuperClass()) { 2434 FillIMTAndConflictTables(klass->GetSuperClass()); 2435 } 2436 if (!klass->IsTemp()) { 2437 Runtime::Current()->GetClassLinker()->FillIMTAndConflictTables(klass); 2438 } 2439 visited_classes_.insert(klass); 2440 } 2441 2442 VariableSizedHandleScope& hs_; 2443 std::vector<Handle<mirror::Class>> to_visit_; 2444 std::unordered_set<ObjPtr<mirror::Class>, HashObjPtr> visited_classes_; 2445}; 2446 2447void CompilerDriver::InitializeClasses(jobject class_loader, 2448 const std::vector<const DexFile*>& dex_files, 2449 TimingLogger* timings) { 2450 for (size_t i = 0; i != dex_files.size(); ++i) { 2451 const DexFile* dex_file = dex_files[i]; 2452 CHECK(dex_file != nullptr); 2453 InitializeClasses(class_loader, *dex_file, dex_files, timings); 2454 } 2455 if (GetCompilerOptions().IsBootImage() || GetCompilerOptions().IsAppImage()) { 2456 // Make sure that we call EnsureIntiailized on all the array classes to call 2457 // SetVerificationAttempted so that the access flags are set. If we do not do this they get 2458 // changed at runtime resulting in more dirty image pages. 2459 // Also create conflict tables. 2460 // Only useful if we are compiling an image (image_classes_ is not null). 2461 ScopedObjectAccess soa(Thread::Current()); 2462 VariableSizedHandleScope hs(soa.Self()); 2463 InitializeArrayClassesAndCreateConflictTablesVisitor visitor(hs); 2464 Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&visitor); 2465 visitor.FillAllIMTAndConflictTables(); 2466 } 2467 if (GetCompilerOptions().IsBootImage()) { 2468 // Prune garbage objects created during aborted transactions. 2469 Runtime::Current()->GetHeap()->CollectGarbage(true); 2470 } 2471} 2472 2473void CompilerDriver::Compile(jobject class_loader, 2474 const std::vector<const DexFile*>& dex_files, 2475 TimingLogger* timings) { 2476 if (kDebugProfileGuidedCompilation) { 2477 LOG(INFO) << "[ProfileGuidedCompilation] " << 2478 ((profile_compilation_info_ == nullptr) 2479 ? "null" 2480 : profile_compilation_info_->DumpInfo(&dex_files)); 2481 } 2482 2483 DCHECK(current_dex_to_dex_methods_ == nullptr); 2484 for (const DexFile* dex_file : dex_files) { 2485 CHECK(dex_file != nullptr); 2486 CompileDexFile(class_loader, 2487 *dex_file, 2488 dex_files, 2489 parallel_thread_pool_.get(), 2490 parallel_thread_count_, 2491 timings); 2492 const ArenaPool* const arena_pool = Runtime::Current()->GetArenaPool(); 2493 const size_t arena_alloc = arena_pool->GetBytesAllocated(); 2494 max_arena_alloc_ = std::max(arena_alloc, max_arena_alloc_); 2495 Runtime::Current()->ReclaimArenaPoolMemory(); 2496 } 2497 2498 ArrayRef<DexFileMethodSet> dex_to_dex_references; 2499 { 2500 // From this point on, we shall not modify dex_to_dex_references_, so 2501 // just grab a reference to it that we use without holding the mutex. 2502 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 2503 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 2504 } 2505 for (const auto& method_set : dex_to_dex_references) { 2506 current_dex_to_dex_methods_ = &method_set.GetMethodIndexes(); 2507 CompileDexFile(class_loader, 2508 method_set.GetDexFile(), 2509 dex_files, 2510 parallel_thread_pool_.get(), 2511 parallel_thread_count_, 2512 timings); 2513 } 2514 current_dex_to_dex_methods_ = nullptr; 2515 2516 VLOG(compiler) << "Compile: " << GetMemoryUsageString(false); 2517} 2518 2519class CompileClassVisitor : public CompilationVisitor { 2520 public: 2521 explicit CompileClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2522 2523 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2524 ATRACE_CALL(); 2525 const DexFile& dex_file = *manager_->GetDexFile(); 2526 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2527 ClassLinker* class_linker = manager_->GetClassLinker(); 2528 jobject jclass_loader = manager_->GetClassLoader(); 2529 ClassReference ref(&dex_file, class_def_index); 2530 // Skip compiling classes with generic verifier failures since they will still fail at runtime 2531 if (manager_->GetCompiler()->verification_results_->IsClassRejected(ref)) { 2532 return; 2533 } 2534 // Use a scoped object access to perform to the quick SkipClass check. 2535 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2536 ScopedObjectAccess soa(Thread::Current()); 2537 StackHandleScope<3> hs(soa.Self()); 2538 Handle<mirror::ClassLoader> class_loader( 2539 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2540 Handle<mirror::Class> klass( 2541 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2542 Handle<mirror::DexCache> dex_cache; 2543 if (klass.Get() == nullptr) { 2544 soa.Self()->AssertPendingException(); 2545 soa.Self()->ClearException(); 2546 dex_cache = hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file)); 2547 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 2548 return; 2549 } else { 2550 dex_cache = hs.NewHandle(klass->GetDexCache()); 2551 } 2552 2553 const uint8_t* class_data = dex_file.GetClassData(class_def); 2554 if (class_data == nullptr) { 2555 // empty class, probably a marker interface 2556 return; 2557 } 2558 2559 // Go to native so that we don't block GC during compilation. 2560 ScopedThreadSuspension sts(soa.Self(), kNative); 2561 2562 CompilerDriver* const driver = manager_->GetCompiler(); 2563 2564 // Can we run DEX-to-DEX compiler on this class ? 2565 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 2566 GetDexToDexCompilationLevel(soa.Self(), *driver, jclass_loader, dex_file, class_def); 2567 2568 ClassDataItemIterator it(dex_file, class_data); 2569 // Skip fields 2570 while (it.HasNextStaticField()) { 2571 it.Next(); 2572 } 2573 while (it.HasNextInstanceField()) { 2574 it.Next(); 2575 } 2576 2577 bool compilation_enabled = driver->IsClassToCompile( 2578 dex_file.StringByTypeIdx(class_def.class_idx_)); 2579 2580 // Compile direct methods 2581 int64_t previous_direct_method_idx = -1; 2582 while (it.HasNextDirectMethod()) { 2583 uint32_t method_idx = it.GetMemberIndex(); 2584 if (method_idx == previous_direct_method_idx) { 2585 // smali can create dex files with two encoded_methods sharing the same method_idx 2586 // http://code.google.com/p/smali/issues/detail?id=119 2587 it.Next(); 2588 continue; 2589 } 2590 previous_direct_method_idx = method_idx; 2591 CompileMethod(soa.Self(), driver, it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2592 it.GetMethodInvokeType(class_def), class_def_index, 2593 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2594 compilation_enabled, dex_cache); 2595 it.Next(); 2596 } 2597 // Compile virtual methods 2598 int64_t previous_virtual_method_idx = -1; 2599 while (it.HasNextVirtualMethod()) { 2600 uint32_t method_idx = it.GetMemberIndex(); 2601 if (method_idx == previous_virtual_method_idx) { 2602 // smali can create dex files with two encoded_methods sharing the same method_idx 2603 // http://code.google.com/p/smali/issues/detail?id=119 2604 it.Next(); 2605 continue; 2606 } 2607 previous_virtual_method_idx = method_idx; 2608 CompileMethod(soa.Self(), driver, it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2609 it.GetMethodInvokeType(class_def), class_def_index, 2610 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2611 compilation_enabled, dex_cache); 2612 it.Next(); 2613 } 2614 DCHECK(!it.HasNext()); 2615 } 2616 2617 private: 2618 const ParallelCompilationManager* const manager_; 2619}; 2620 2621void CompilerDriver::CompileDexFile(jobject class_loader, 2622 const DexFile& dex_file, 2623 const std::vector<const DexFile*>& dex_files, 2624 ThreadPool* thread_pool, 2625 size_t thread_count, 2626 TimingLogger* timings) { 2627 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2628 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2629 &dex_file, dex_files, thread_pool); 2630 CompileClassVisitor visitor(&context); 2631 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2632} 2633 2634void CompilerDriver::AddCompiledMethod(const MethodReference& method_ref, 2635 CompiledMethod* const compiled_method, 2636 size_t non_relative_linker_patch_count) { 2637 DCHECK(GetCompiledMethod(method_ref) == nullptr) 2638 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2639 MethodTable::InsertResult result = compiled_methods_.Insert(method_ref, 2640 /*expected*/ nullptr, 2641 compiled_method); 2642 CHECK(result == MethodTable::kInsertResultSuccess); 2643 non_relative_linker_patch_count_.FetchAndAddRelaxed(non_relative_linker_patch_count); 2644 DCHECK(GetCompiledMethod(method_ref) != nullptr) 2645 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2646} 2647 2648CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2649 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2650 ClassTable::const_iterator it = compiled_classes_.find(ref); 2651 if (it == compiled_classes_.end()) { 2652 return nullptr; 2653 } 2654 CHECK(it->second != nullptr); 2655 return it->second; 2656} 2657 2658void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2659 switch (status) { 2660 case mirror::Class::kStatusNotReady: 2661 case mirror::Class::kStatusErrorResolved: 2662 case mirror::Class::kStatusErrorUnresolved: 2663 case mirror::Class::kStatusRetryVerificationAtRuntime: 2664 case mirror::Class::kStatusVerified: 2665 case mirror::Class::kStatusInitialized: 2666 case mirror::Class::kStatusResolved: 2667 break; // Expected states. 2668 default: 2669 LOG(FATAL) << "Unexpected class status for class " 2670 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2671 << " of " << status; 2672 } 2673 2674 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2675 auto it = compiled_classes_.find(ref); 2676 if (it == compiled_classes_.end()) { 2677 CompiledClass* compiled_class = new CompiledClass(status); 2678 compiled_classes_.Overwrite(ref, compiled_class); 2679 } else if (status > it->second->GetStatus()) { 2680 // Update the status if we now have a greater one. This happens with vdex, 2681 // which records a class is verified, but does not resolve it. 2682 it->second->SetStatus(status); 2683 } 2684} 2685 2686CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2687 CompiledMethod* compiled_method = nullptr; 2688 compiled_methods_.Get(ref, &compiled_method); 2689 return compiled_method; 2690} 2691 2692bool CompilerDriver::IsMethodVerifiedWithoutFailures(uint32_t method_idx, 2693 uint16_t class_def_idx, 2694 const DexFile& dex_file) const { 2695 const VerifiedMethod* verified_method = GetVerifiedMethod(&dex_file, method_idx); 2696 if (verified_method != nullptr) { 2697 return !verified_method->HasVerificationFailures(); 2698 } 2699 2700 // If we can't find verification metadata, check if this is a system class (we trust that system 2701 // classes have their methods verified). If it's not, be conservative and assume the method 2702 // has not been verified successfully. 2703 2704 // TODO: When compiling the boot image it should be safe to assume that everything is verified, 2705 // even if methods are not found in the verification cache. 2706 const char* descriptor = dex_file.GetClassDescriptor(dex_file.GetClassDef(class_def_idx)); 2707 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2708 Thread* self = Thread::Current(); 2709 ScopedObjectAccess soa(self); 2710 bool is_system_class = class_linker->FindSystemClass(self, descriptor) != nullptr; 2711 if (!is_system_class) { 2712 self->ClearException(); 2713 } 2714 return is_system_class; 2715} 2716 2717size_t CompilerDriver::GetNonRelativeLinkerPatchCount() const { 2718 return non_relative_linker_patch_count_.LoadRelaxed(); 2719} 2720 2721void CompilerDriver::SetRequiresConstructorBarrier(Thread* self, 2722 const DexFile* dex_file, 2723 uint16_t class_def_index, 2724 bool requires) { 2725 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2726 requires_constructor_barrier_.emplace(ClassReference(dex_file, class_def_index), requires); 2727} 2728 2729bool CompilerDriver::RequiresConstructorBarrier(Thread* self, 2730 const DexFile* dex_file, 2731 uint16_t class_def_index) { 2732 ClassReference class_ref(dex_file, class_def_index); 2733 { 2734 ReaderMutexLock mu(self, requires_constructor_barrier_lock_); 2735 auto it = requires_constructor_barrier_.find(class_ref); 2736 if (it != requires_constructor_barrier_.end()) { 2737 return it->second; 2738 } 2739 } 2740 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2741 const bool requires = RequiresConstructorBarrier(*dex_file, class_def_index); 2742 requires_constructor_barrier_.emplace(class_ref, requires); 2743 return requires; 2744} 2745 2746std::string CompilerDriver::GetMemoryUsageString(bool extended) const { 2747 std::ostringstream oss; 2748 const gc::Heap* const heap = Runtime::Current()->GetHeap(); 2749 const size_t java_alloc = heap->GetBytesAllocated(); 2750 oss << "arena alloc=" << PrettySize(max_arena_alloc_) << " (" << max_arena_alloc_ << "B)"; 2751 oss << " java alloc=" << PrettySize(java_alloc) << " (" << java_alloc << "B)"; 2752#if defined(__BIONIC__) || defined(__GLIBC__) 2753 const struct mallinfo info = mallinfo(); 2754 const size_t allocated_space = static_cast<size_t>(info.uordblks); 2755 const size_t free_space = static_cast<size_t>(info.fordblks); 2756 oss << " native alloc=" << PrettySize(allocated_space) << " (" << allocated_space << "B)" 2757 << " free=" << PrettySize(free_space) << " (" << free_space << "B)"; 2758#endif 2759 compiled_method_storage_.DumpMemoryUsage(oss, extended); 2760 return oss.str(); 2761} 2762 2763bool CompilerDriver::MayInlineInternal(const DexFile* inlined_from, 2764 const DexFile* inlined_into) const { 2765 // We're not allowed to inline across dex files if we're the no-inline-from dex file. 2766 if (inlined_from != inlined_into && 2767 compiler_options_->GetNoInlineFromDexFile() != nullptr && 2768 ContainsElement(*compiler_options_->GetNoInlineFromDexFile(), inlined_from)) { 2769 return false; 2770 } 2771 2772 return true; 2773} 2774 2775void CompilerDriver::InitializeThreadPools() { 2776 size_t parallel_count = parallel_thread_count_ > 0 ? parallel_thread_count_ - 1 : 0; 2777 parallel_thread_pool_.reset( 2778 new ThreadPool("Compiler driver thread pool", parallel_count)); 2779 single_thread_pool_.reset(new ThreadPool("Single-threaded Compiler driver thread pool", 0)); 2780} 2781 2782void CompilerDriver::FreeThreadPools() { 2783 parallel_thread_pool_.reset(); 2784 single_thread_pool_.reset(); 2785} 2786 2787} // namespace art 2788