compiler_driver.cc revision 85c0f2ac03417f5125bc2ff1dab8109859c67d5c
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 Handle<mirror::ClassLoader> 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); 627 628 // TODO: Lookup annotation from DexFile directly without resolving method. 629 ArtMethod* method = 630 Runtime::Current()->GetClassLinker()->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 631 dex_file, 632 method_idx, 633 dex_cache, 634 class_loader, 635 /* referrer */ nullptr, 636 invoke_type); 637 638 // Query any JNI optimization annotations such as @FastNative or @CriticalNative. 639 Compiler::JniOptimizationFlags optimization_flags = Compiler::kNone; 640 if (UNLIKELY(method == nullptr)) { 641 // Failed method resolutions happen very rarely, e.g. ancestor class cannot be resolved. 642 DCHECK(self->IsExceptionPending()); 643 self->ClearException(); 644 } else if (method->IsAnnotatedWithFastNative()) { 645 // TODO: Will no longer need this CHECK once we have verifier checking this. 646 CHECK(!method->IsAnnotatedWithCriticalNative()); 647 optimization_flags = Compiler::kFastNative; 648 } else if (method->IsAnnotatedWithCriticalNative()) { 649 // TODO: Will no longer need this CHECK once we have verifier checking this. 650 CHECK(!method->IsAnnotatedWithFastNative()); 651 optimization_flags = Compiler::kCriticalNative; 652 } 653 654 compiled_method = driver->GetCompiler()->JniCompile(access_flags, 655 method_idx, 656 dex_file, 657 optimization_flags); 658 CHECK(compiled_method != nullptr); 659 } 660 } else if ((access_flags & kAccAbstract) != 0) { 661 // Abstract methods don't have code. 662 } else { 663 const VerifiedMethod* verified_method = 664 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 665 bool compile = compilation_enabled && 666 // Basic checks, e.g., not <clinit>. 667 driver->GetVerificationResults() 668 ->IsCandidateForCompilation(method_ref, access_flags) && 669 // Did not fail to create VerifiedMethod metadata. 670 verified_method != nullptr && 671 // Do not have failures that should punt to the interpreter. 672 !verified_method->HasRuntimeThrow() && 673 (verified_method->GetEncounteredVerificationFailures() & 674 (verifier::VERIFY_ERROR_FORCE_INTERPRETER | verifier::VERIFY_ERROR_LOCKING)) == 0 && 675 // Is eligable for compilation by methods-to-compile filter. 676 driver->IsMethodToCompile(method_ref) && 677 driver->ShouldCompileBasedOnProfile(method_ref); 678 679 if (compile) { 680 // NOTE: if compiler declines to compile this method, it will return null. 681 compiled_method = driver->GetCompiler()->Compile(code_item, 682 access_flags, 683 invoke_type, 684 class_def_idx, 685 method_idx, 686 class_loader, 687 dex_file, 688 dex_cache); 689 } 690 if (compiled_method == nullptr && 691 dex_to_dex_compilation_level != optimizer::DexToDexCompilationLevel::kDontDexToDexCompile) { 692 DCHECK(!Runtime::Current()->UseJitCompilation()); 693 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 694 driver->MarkForDexToDexCompilation(self, method_ref); 695 } 696 } 697 if (kTimeCompileMethod) { 698 uint64_t duration_ns = NanoTime() - start_ns; 699 if (duration_ns > MsToNs(driver->GetCompiler()->GetMaximumCompilationTimeBeforeWarning())) { 700 LOG(WARNING) << "Compilation of " << dex_file.PrettyMethod(method_idx) 701 << " took " << PrettyDuration(duration_ns); 702 } 703 } 704 705 if (compiled_method != nullptr) { 706 // Count non-relative linker patches. 707 size_t non_relative_linker_patch_count = 0u; 708 for (const LinkerPatch& patch : compiled_method->GetPatches()) { 709 if (!patch.IsPcRelative()) { 710 ++non_relative_linker_patch_count; 711 } 712 } 713 bool compile_pic = driver->GetCompilerOptions().GetCompilePic(); // Off by default 714 // When compiling with PIC, there should be zero non-relative linker patches 715 CHECK(!compile_pic || non_relative_linker_patch_count == 0u); 716 717 driver->AddCompiledMethod(method_ref, compiled_method, non_relative_linker_patch_count); 718 } 719 720 if (self->IsExceptionPending()) { 721 ScopedObjectAccess soa(self); 722 LOG(FATAL) << "Unexpected exception compiling: " << dex_file.PrettyMethod(method_idx) << "\n" 723 << self->GetException()->Dump(); 724 } 725} 726 727void CompilerDriver::CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) { 728 DCHECK(!Runtime::Current()->IsStarted()); 729 jobject jclass_loader; 730 const DexFile* dex_file; 731 uint16_t class_def_idx; 732 uint32_t method_idx = method->GetDexMethodIndex(); 733 uint32_t access_flags = method->GetAccessFlags(); 734 InvokeType invoke_type = method->GetInvokeType(); 735 StackHandleScope<2> hs(self); 736 Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache())); 737 Handle<mirror::ClassLoader> class_loader( 738 hs.NewHandle(method->GetDeclaringClass()->GetClassLoader())); 739 { 740 ScopedObjectAccessUnchecked soa(self); 741 ScopedLocalRef<jobject> local_class_loader( 742 soa.Env(), soa.AddLocalReference<jobject>(class_loader.Get())); 743 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 744 // Find the dex_file 745 dex_file = method->GetDexFile(); 746 class_def_idx = method->GetClassDefIndex(); 747 } 748 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 749 750 // Go to native so that we don't block GC during compilation. 751 ScopedThreadSuspension sts(self, kNative); 752 753 std::vector<const DexFile*> dex_files; 754 dex_files.push_back(dex_file); 755 756 InitializeThreadPools(); 757 758 PreCompile(jclass_loader, dex_files, timings); 759 760 // Can we run DEX-to-DEX compiler on this class ? 761 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 762 GetDexToDexCompilationLevel(self, 763 *this, 764 jclass_loader, 765 *dex_file, 766 dex_file->GetClassDef(class_def_idx)); 767 768 DCHECK(current_dex_to_dex_methods_ == nullptr); 769 CompileMethod(self, 770 this, 771 code_item, 772 access_flags, 773 invoke_type, 774 class_def_idx, 775 method_idx, 776 class_loader, 777 *dex_file, 778 dex_to_dex_compilation_level, 779 true, 780 dex_cache); 781 782 ArrayRef<DexFileMethodSet> dex_to_dex_references; 783 { 784 // From this point on, we shall not modify dex_to_dex_references_, so 785 // just grab a reference to it that we use without holding the mutex. 786 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 787 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 788 } 789 if (!dex_to_dex_references.empty()) { 790 DCHECK_EQ(dex_to_dex_references.size(), 1u); 791 DCHECK(&dex_to_dex_references[0].GetDexFile() == dex_file); 792 current_dex_to_dex_methods_ = &dex_to_dex_references.front().GetMethodIndexes(); 793 DCHECK(current_dex_to_dex_methods_->IsBitSet(method_idx)); 794 DCHECK_EQ(current_dex_to_dex_methods_->NumSetBits(), 1u); 795 CompileMethod(self, 796 this, 797 code_item, 798 access_flags, 799 invoke_type, 800 class_def_idx, 801 method_idx, 802 class_loader, 803 *dex_file, 804 dex_to_dex_compilation_level, 805 true, 806 dex_cache); 807 current_dex_to_dex_methods_ = nullptr; 808 } 809 810 FreeThreadPools(); 811 812 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 813} 814 815void CompilerDriver::Resolve(jobject class_loader, 816 const std::vector<const DexFile*>& dex_files, 817 TimingLogger* timings) { 818 // Resolution allocates classes and needs to run single-threaded to be deterministic. 819 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 820 ThreadPool* resolve_thread_pool = force_determinism 821 ? single_thread_pool_.get() 822 : parallel_thread_pool_.get(); 823 size_t resolve_thread_count = force_determinism ? 1U : parallel_thread_count_; 824 825 for (size_t i = 0; i != dex_files.size(); ++i) { 826 const DexFile* dex_file = dex_files[i]; 827 CHECK(dex_file != nullptr); 828 ResolveDexFile(class_loader, 829 *dex_file, 830 dex_files, 831 resolve_thread_pool, 832 resolve_thread_count, 833 timings); 834 } 835} 836 837// Resolve const-strings in the code. Done to have deterministic allocation behavior. Right now 838// this is single-threaded for simplicity. 839// TODO: Collect the relevant string indices in parallel, then allocate them sequentially in a 840// stable order. 841 842static void ResolveConstStrings(Handle<mirror::DexCache> dex_cache, 843 const DexFile& dex_file, 844 const DexFile::CodeItem* code_item) 845 REQUIRES_SHARED(Locks::mutator_lock_) { 846 if (code_item == nullptr) { 847 // Abstract or native method. 848 return; 849 } 850 851 const uint16_t* code_ptr = code_item->insns_; 852 const uint16_t* code_end = code_item->insns_ + code_item->insns_size_in_code_units_; 853 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 854 855 while (code_ptr < code_end) { 856 const Instruction* inst = Instruction::At(code_ptr); 857 switch (inst->Opcode()) { 858 case Instruction::CONST_STRING: 859 case Instruction::CONST_STRING_JUMBO: { 860 dex::StringIndex string_index((inst->Opcode() == Instruction::CONST_STRING) 861 ? inst->VRegB_21c() 862 : inst->VRegB_31c()); 863 mirror::String* string = class_linker->ResolveString(dex_file, string_index, dex_cache); 864 CHECK(string != nullptr) << "Could not allocate a string when forcing determinism"; 865 break; 866 } 867 868 default: 869 break; 870 } 871 872 code_ptr += inst->SizeInCodeUnits(); 873 } 874} 875 876static void ResolveConstStrings(CompilerDriver* driver, 877 const std::vector<const DexFile*>& dex_files, 878 TimingLogger* timings) { 879 ScopedObjectAccess soa(Thread::Current()); 880 StackHandleScope<1> hs(soa.Self()); 881 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 882 MutableHandle<mirror::DexCache> dex_cache(hs.NewHandle<mirror::DexCache>(nullptr)); 883 884 for (const DexFile* dex_file : dex_files) { 885 dex_cache.Assign(class_linker->FindDexCache(soa.Self(), *dex_file)); 886 TimingLogger::ScopedTiming t("Resolve const-string Strings", timings); 887 888 size_t class_def_count = dex_file->NumClassDefs(); 889 for (size_t class_def_index = 0; class_def_index < class_def_count; ++class_def_index) { 890 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index); 891 892 const uint8_t* class_data = dex_file->GetClassData(class_def); 893 if (class_data == nullptr) { 894 // empty class, probably a marker interface 895 continue; 896 } 897 898 ClassDataItemIterator it(*dex_file, class_data); 899 // Skip fields 900 while (it.HasNextStaticField()) { 901 it.Next(); 902 } 903 while (it.HasNextInstanceField()) { 904 it.Next(); 905 } 906 907 bool compilation_enabled = driver->IsClassToCompile( 908 dex_file->StringByTypeIdx(class_def.class_idx_)); 909 if (!compilation_enabled) { 910 // Compilation is skipped, do not resolve const-string in code of this class. 911 // TODO: Make sure that inlining honors this. 912 continue; 913 } 914 915 // Direct methods. 916 int64_t previous_direct_method_idx = -1; 917 while (it.HasNextDirectMethod()) { 918 uint32_t method_idx = it.GetMemberIndex(); 919 if (method_idx == previous_direct_method_idx) { 920 // smali can create dex files with two encoded_methods sharing the same method_idx 921 // http://code.google.com/p/smali/issues/detail?id=119 922 it.Next(); 923 continue; 924 } 925 previous_direct_method_idx = method_idx; 926 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 927 it.Next(); 928 } 929 // Virtual methods. 930 int64_t previous_virtual_method_idx = -1; 931 while (it.HasNextVirtualMethod()) { 932 uint32_t method_idx = it.GetMemberIndex(); 933 if (method_idx == previous_virtual_method_idx) { 934 // smali can create dex files with two encoded_methods sharing the same method_idx 935 // http://code.google.com/p/smali/issues/detail?id=119 936 it.Next(); 937 continue; 938 } 939 previous_virtual_method_idx = method_idx; 940 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 941 it.Next(); 942 } 943 DCHECK(!it.HasNext()); 944 } 945 } 946} 947 948inline void CompilerDriver::CheckThreadPools() { 949 DCHECK(parallel_thread_pool_ != nullptr); 950 DCHECK(single_thread_pool_ != nullptr); 951} 952 953static void EnsureVerifiedOrVerifyAtRuntime(jobject jclass_loader, 954 const std::vector<const DexFile*>& dex_files) { 955 ScopedObjectAccess soa(Thread::Current()); 956 StackHandleScope<2> hs(soa.Self()); 957 Handle<mirror::ClassLoader> class_loader( 958 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 959 MutableHandle<mirror::Class> cls(hs.NewHandle<mirror::Class>(nullptr)); 960 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 961 962 for (const DexFile* dex_file : dex_files) { 963 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 964 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 965 const char* descriptor = dex_file->GetClassDescriptor(class_def); 966 cls.Assign(class_linker->FindClass(soa.Self(), descriptor, class_loader)); 967 if (cls.Get() == nullptr) { 968 soa.Self()->ClearException(); 969 } else if (&cls->GetDexFile() == dex_file) { 970 DCHECK(cls->IsErroneous() || cls->IsVerified() || cls->IsCompileTimeVerified()) 971 << cls->PrettyClass() 972 << " " << cls->GetStatus(); 973 } 974 } 975 } 976} 977 978void CompilerDriver::PreCompile(jobject class_loader, 979 const std::vector<const DexFile*>& dex_files, 980 TimingLogger* timings) { 981 CheckThreadPools(); 982 983 for (const DexFile* dex_file : dex_files) { 984 // Can be already inserted if the caller is CompileOne. This happens for gtests. 985 if (!compiled_methods_.HaveDexFile(dex_file)) { 986 compiled_methods_.AddDexFile(dex_file); 987 } 988 } 989 990 LoadImageClasses(timings); 991 VLOG(compiler) << "LoadImageClasses: " << GetMemoryUsageString(false); 992 993 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 994 Resolve(class_loader, dex_files, timings); 995 VLOG(compiler) << "Resolve: " << GetMemoryUsageString(false); 996 } 997 998 if (compiler_options_->AssumeClassesAreVerified()) { 999 VLOG(compiler) << "Verify none mode specified, skipping verification."; 1000 SetVerified(class_loader, dex_files, timings); 1001 } 1002 1003 if (!compiler_options_->IsVerificationEnabled()) { 1004 return; 1005 } 1006 1007 if (GetCompilerOptions().IsForceDeterminism() && GetCompilerOptions().IsBootImage()) { 1008 // Resolve strings from const-string. Do this now to have a deterministic image. 1009 ResolveConstStrings(this, dex_files, timings); 1010 VLOG(compiler) << "Resolve const-strings: " << GetMemoryUsageString(false); 1011 } 1012 1013 Verify(class_loader, dex_files, timings); 1014 VLOG(compiler) << "Verify: " << GetMemoryUsageString(false); 1015 1016 if (had_hard_verifier_failure_ && GetCompilerOptions().AbortOnHardVerifierFailure()) { 1017 LOG(FATAL) << "Had a hard failure verifying all classes, and was asked to abort in such " 1018 << "situations. Please check the log."; 1019 } 1020 1021 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 1022 if (kIsDebugBuild) { 1023 EnsureVerifiedOrVerifyAtRuntime(class_loader, dex_files); 1024 } 1025 InitializeClasses(class_loader, dex_files, timings); 1026 VLOG(compiler) << "InitializeClasses: " << GetMemoryUsageString(false); 1027 } 1028 1029 UpdateImageClasses(timings); 1030 VLOG(compiler) << "UpdateImageClasses: " << GetMemoryUsageString(false); 1031} 1032 1033bool CompilerDriver::IsImageClass(const char* descriptor) const { 1034 if (image_classes_ != nullptr) { 1035 // If we have a set of image classes, use those. 1036 return image_classes_->find(descriptor) != image_classes_->end(); 1037 } 1038 // No set of image classes, assume we include all the classes. 1039 // NOTE: Currently only reachable from InitImageMethodVisitor for the app image case. 1040 return !GetCompilerOptions().IsBootImage(); 1041} 1042 1043bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 1044 if (classes_to_compile_ == nullptr) { 1045 return true; 1046 } 1047 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 1048} 1049 1050bool CompilerDriver::IsMethodToCompile(const MethodReference& method_ref) const { 1051 if (methods_to_compile_ == nullptr) { 1052 return true; 1053 } 1054 1055 std::string tmp = method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1056 return methods_to_compile_->find(tmp.c_str()) != methods_to_compile_->end(); 1057} 1058 1059bool CompilerDriver::ShouldCompileBasedOnProfile(const MethodReference& method_ref) const { 1060 if (profile_compilation_info_ == nullptr) { 1061 // If we miss profile information it means that we don't do a profile guided compilation. 1062 // Return true, and let the other filters decide if the method should be compiled. 1063 return true; 1064 } 1065 bool result = profile_compilation_info_->ContainsMethod(method_ref); 1066 1067 if (kDebugProfileGuidedCompilation) { 1068 LOG(INFO) << "[ProfileGuidedCompilation] " 1069 << (result ? "Compiled" : "Skipped") << " method:" 1070 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1071 } 1072 return result; 1073} 1074 1075class ResolveCatchBlockExceptionsClassVisitor : public ClassVisitor { 1076 public: 1077 ResolveCatchBlockExceptionsClassVisitor() : classes_() {} 1078 1079 virtual bool operator()(ObjPtr<mirror::Class> c) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1080 classes_.push_back(c); 1081 return true; 1082 } 1083 1084 void FindExceptionTypesToResolve( 1085 std::set<std::pair<dex::TypeIndex, const DexFile*>>* exceptions_to_resolve) 1086 REQUIRES_SHARED(Locks::mutator_lock_) { 1087 const auto pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1088 for (ObjPtr<mirror::Class> klass : classes_) { 1089 for (ArtMethod& method : klass->GetMethods(pointer_size)) { 1090 FindExceptionTypesToResolveForMethod(&method, exceptions_to_resolve); 1091 } 1092 } 1093 } 1094 1095 private: 1096 void FindExceptionTypesToResolveForMethod( 1097 ArtMethod* method, 1098 std::set<std::pair<dex::TypeIndex, const DexFile*>>* exceptions_to_resolve) 1099 REQUIRES_SHARED(Locks::mutator_lock_) { 1100 const DexFile::CodeItem* code_item = method->GetCodeItem(); 1101 if (code_item == nullptr) { 1102 return; // native or abstract method 1103 } 1104 if (code_item->tries_size_ == 0) { 1105 return; // nothing to process 1106 } 1107 const uint8_t* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 1108 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 1109 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 1110 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 1111 bool has_catch_all = false; 1112 if (encoded_catch_handler_size <= 0) { 1113 encoded_catch_handler_size = -encoded_catch_handler_size; 1114 has_catch_all = true; 1115 } 1116 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 1117 dex::TypeIndex encoded_catch_handler_handlers_type_idx = 1118 dex::TypeIndex(DecodeUnsignedLeb128(&encoded_catch_handler_list)); 1119 // Add to set of types to resolve if not already in the dex cache resolved types 1120 if (!method->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 1121 exceptions_to_resolve->emplace(encoded_catch_handler_handlers_type_idx, 1122 method->GetDexFile()); 1123 } 1124 // ignore address associated with catch handler 1125 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1126 } 1127 if (has_catch_all) { 1128 // ignore catch all address 1129 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1130 } 1131 } 1132 } 1133 1134 std::vector<ObjPtr<mirror::Class>> classes_; 1135}; 1136 1137class RecordImageClassesVisitor : public ClassVisitor { 1138 public: 1139 explicit RecordImageClassesVisitor(std::unordered_set<std::string>* image_classes) 1140 : image_classes_(image_classes) {} 1141 1142 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1143 std::string temp; 1144 image_classes_->insert(klass->GetDescriptor(&temp)); 1145 return true; 1146 } 1147 1148 private: 1149 std::unordered_set<std::string>* const image_classes_; 1150}; 1151 1152// Make a list of descriptors for classes to include in the image 1153void CompilerDriver::LoadImageClasses(TimingLogger* timings) { 1154 CHECK(timings != nullptr); 1155 if (!GetCompilerOptions().IsBootImage()) { 1156 return; 1157 } 1158 1159 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 1160 // Make a first class to load all classes explicitly listed in the file 1161 Thread* self = Thread::Current(); 1162 ScopedObjectAccess soa(self); 1163 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1164 CHECK(image_classes_.get() != nullptr); 1165 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 1166 const std::string& descriptor(*it); 1167 StackHandleScope<1> hs(self); 1168 Handle<mirror::Class> klass( 1169 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 1170 if (klass.Get() == nullptr) { 1171 VLOG(compiler) << "Failed to find class " << descriptor; 1172 image_classes_->erase(it++); 1173 self->ClearException(); 1174 } else { 1175 ++it; 1176 } 1177 } 1178 1179 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 1180 // exceptions are resolved by the verifier when there is a catch block in an interested method. 1181 // Do this here so that exception classes appear to have been specified image classes. 1182 std::set<std::pair<dex::TypeIndex, const DexFile*>> unresolved_exception_types; 1183 StackHandleScope<1> hs(self); 1184 Handle<mirror::Class> java_lang_Throwable( 1185 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 1186 do { 1187 unresolved_exception_types.clear(); 1188 { 1189 // Thread suspension is not allowed while ResolveCatchBlockExceptionsClassVisitor 1190 // is using a std::vector<ObjPtr<mirror::Class>>. 1191 ScopedAssertNoThreadSuspension ants(__FUNCTION__); 1192 ResolveCatchBlockExceptionsClassVisitor visitor; 1193 class_linker->VisitClasses(&visitor); 1194 visitor.FindExceptionTypesToResolve(&unresolved_exception_types); 1195 } 1196 for (const auto& exception_type : unresolved_exception_types) { 1197 dex::TypeIndex exception_type_idx = exception_type.first; 1198 const DexFile* dex_file = exception_type.second; 1199 StackHandleScope<2> hs2(self); 1200 Handle<mirror::DexCache> dex_cache(hs2.NewHandle(class_linker->RegisterDexFile(*dex_file, 1201 nullptr))); 1202 Handle<mirror::Class> klass(hs2.NewHandle( 1203 (dex_cache.Get() != nullptr) 1204 ? class_linker->ResolveType(*dex_file, 1205 exception_type_idx, 1206 dex_cache, 1207 ScopedNullHandle<mirror::ClassLoader>()) 1208 : nullptr)); 1209 if (klass.Get() == nullptr) { 1210 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 1211 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 1212 LOG(FATAL) << "Failed to resolve class " << descriptor; 1213 } 1214 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 1215 } 1216 // Resolving exceptions may load classes that reference more exceptions, iterate until no 1217 // more are found 1218 } while (!unresolved_exception_types.empty()); 1219 1220 // We walk the roots looking for classes so that we'll pick up the 1221 // above classes plus any classes them depend on such super 1222 // classes, interfaces, and the required ClassLinker roots. 1223 RecordImageClassesVisitor visitor(image_classes_.get()); 1224 class_linker->VisitClasses(&visitor); 1225 1226 CHECK_NE(image_classes_->size(), 0U); 1227} 1228 1229static void MaybeAddToImageClasses(Thread* self, 1230 ObjPtr<mirror::Class> klass, 1231 std::unordered_set<std::string>* image_classes) 1232 REQUIRES_SHARED(Locks::mutator_lock_) { 1233 DCHECK_EQ(self, Thread::Current()); 1234 StackHandleScope<1> hs(self); 1235 std::string temp; 1236 const PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1237 while (!klass->IsObjectClass()) { 1238 const char* descriptor = klass->GetDescriptor(&temp); 1239 std::pair<std::unordered_set<std::string>::iterator, bool> result = 1240 image_classes->insert(descriptor); 1241 if (!result.second) { // Previously inserted. 1242 break; 1243 } 1244 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 1245 for (size_t i = 0, num_interfaces = klass->NumDirectInterfaces(); i != num_interfaces; ++i) { 1246 ObjPtr<mirror::Class> interface = mirror::Class::GetDirectInterface(self, klass, i); 1247 DCHECK(interface != nullptr); 1248 MaybeAddToImageClasses(self, interface, image_classes); 1249 } 1250 for (auto& m : klass->GetVirtualMethods(pointer_size)) { 1251 MaybeAddToImageClasses(self, m.GetDeclaringClass(), image_classes); 1252 } 1253 if (klass->IsArrayClass()) { 1254 MaybeAddToImageClasses(self, klass->GetComponentType(), image_classes); 1255 } 1256 klass.Assign(klass->GetSuperClass()); 1257 } 1258} 1259 1260// Keeps all the data for the update together. Also doubles as the reference visitor. 1261// Note: we can use object pointers because we suspend all threads. 1262class ClinitImageUpdate { 1263 public: 1264 static ClinitImageUpdate* Create(VariableSizedHandleScope& hs, 1265 std::unordered_set<std::string>* image_class_descriptors, 1266 Thread* self, 1267 ClassLinker* linker) { 1268 std::unique_ptr<ClinitImageUpdate> res(new ClinitImageUpdate(hs, 1269 image_class_descriptors, 1270 self, 1271 linker)); 1272 return res.release(); 1273 } 1274 1275 ~ClinitImageUpdate() { 1276 // Allow others to suspend again. 1277 self_->EndAssertNoThreadSuspension(old_cause_); 1278 } 1279 1280 // Visitor for VisitReferences. 1281 void operator()(ObjPtr<mirror::Object> object, 1282 MemberOffset field_offset, 1283 bool /* is_static */) const 1284 REQUIRES_SHARED(Locks::mutator_lock_) { 1285 mirror::Object* ref = object->GetFieldObject<mirror::Object>(field_offset); 1286 if (ref != nullptr) { 1287 VisitClinitClassesObject(ref); 1288 } 1289 } 1290 1291 // java.lang.ref.Reference visitor for VisitReferences. 1292 void operator()(ObjPtr<mirror::Class> klass ATTRIBUTE_UNUSED, 1293 ObjPtr<mirror::Reference> ref ATTRIBUTE_UNUSED) const {} 1294 1295 // Ignore class native roots. 1296 void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) 1297 const {} 1298 void VisitRoot(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) const {} 1299 1300 void Walk() REQUIRES_SHARED(Locks::mutator_lock_) { 1301 // Use the initial classes as roots for a search. 1302 for (Handle<mirror::Class> klass_root : image_classes_) { 1303 VisitClinitClassesObject(klass_root.Get()); 1304 } 1305 Thread* self = Thread::Current(); 1306 ScopedAssertNoThreadSuspension ants(__FUNCTION__); 1307 for (Handle<mirror::Class> h_klass : to_insert_) { 1308 MaybeAddToImageClasses(self, h_klass.Get(), image_class_descriptors_); 1309 } 1310 } 1311 1312 private: 1313 class FindImageClassesVisitor : public ClassVisitor { 1314 public: 1315 explicit FindImageClassesVisitor(VariableSizedHandleScope& hs, 1316 ClinitImageUpdate* data) 1317 : data_(data), 1318 hs_(hs) {} 1319 1320 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1321 std::string temp; 1322 const char* name = klass->GetDescriptor(&temp); 1323 if (data_->image_class_descriptors_->find(name) != data_->image_class_descriptors_->end()) { 1324 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1325 } else { 1326 // Check whether it is initialized and has a clinit. They must be kept, too. 1327 if (klass->IsInitialized() && klass->FindClassInitializer( 1328 Runtime::Current()->GetClassLinker()->GetImagePointerSize()) != nullptr) { 1329 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1330 } 1331 } 1332 return true; 1333 } 1334 1335 private: 1336 ClinitImageUpdate* const data_; 1337 VariableSizedHandleScope& hs_; 1338 }; 1339 1340 ClinitImageUpdate(VariableSizedHandleScope& hs, 1341 std::unordered_set<std::string>* image_class_descriptors, 1342 Thread* self, 1343 ClassLinker* linker) REQUIRES_SHARED(Locks::mutator_lock_) 1344 : hs_(hs), 1345 image_class_descriptors_(image_class_descriptors), 1346 self_(self) { 1347 CHECK(linker != nullptr); 1348 CHECK(image_class_descriptors != nullptr); 1349 1350 // Make sure nobody interferes with us. 1351 old_cause_ = self->StartAssertNoThreadSuspension("Boot image closure"); 1352 1353 // Find all the already-marked classes. 1354 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1355 FindImageClassesVisitor visitor(hs_, this); 1356 linker->VisitClasses(&visitor); 1357 } 1358 1359 void VisitClinitClassesObject(mirror::Object* object) const 1360 REQUIRES_SHARED(Locks::mutator_lock_) { 1361 DCHECK(object != nullptr); 1362 if (marked_objects_.find(object) != marked_objects_.end()) { 1363 // Already processed. 1364 return; 1365 } 1366 1367 // Mark it. 1368 marked_objects_.insert(object); 1369 1370 if (object->IsClass()) { 1371 // Add to the TODO list since MaybeAddToImageClasses may cause thread suspension. Thread 1372 // suspensionb is not safe to do in VisitObjects or VisitReferences. 1373 to_insert_.push_back(hs_.NewHandle(object->AsClass())); 1374 } else { 1375 // Else visit the object's class. 1376 VisitClinitClassesObject(object->GetClass()); 1377 } 1378 1379 // If it is not a DexCache, visit all references. 1380 if (!object->IsDexCache()) { 1381 object->VisitReferences(*this, *this); 1382 } 1383 } 1384 1385 VariableSizedHandleScope& hs_; 1386 mutable std::vector<Handle<mirror::Class>> to_insert_; 1387 mutable std::unordered_set<mirror::Object*> marked_objects_; 1388 std::unordered_set<std::string>* const image_class_descriptors_; 1389 std::vector<Handle<mirror::Class>> image_classes_; 1390 Thread* const self_; 1391 const char* old_cause_; 1392 1393 DISALLOW_COPY_AND_ASSIGN(ClinitImageUpdate); 1394}; 1395 1396void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 1397 if (GetCompilerOptions().IsBootImage()) { 1398 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 1399 1400 Runtime* runtime = Runtime::Current(); 1401 1402 // Suspend all threads. 1403 ScopedSuspendAll ssa(__FUNCTION__); 1404 1405 VariableSizedHandleScope hs(Thread::Current()); 1406 std::string error_msg; 1407 std::unique_ptr<ClinitImageUpdate> update(ClinitImageUpdate::Create(hs, 1408 image_classes_.get(), 1409 Thread::Current(), 1410 runtime->GetClassLinker())); 1411 1412 // Do the marking. 1413 update->Walk(); 1414 } 1415} 1416 1417bool CompilerDriver::CanAssumeClassIsLoaded(mirror::Class* klass) { 1418 Runtime* runtime = Runtime::Current(); 1419 if (!runtime->IsAotCompiler()) { 1420 DCHECK(runtime->UseJitCompilation()); 1421 // Having the klass reference here implies that the klass is already loaded. 1422 return true; 1423 } 1424 if (!GetCompilerOptions().IsBootImage()) { 1425 // Assume loaded only if klass is in the boot image. App classes cannot be assumed 1426 // loaded because we don't even know what class loader will be used to load them. 1427 bool class_in_image = runtime->GetHeap()->FindSpaceFromObject(klass, false)->IsImageSpace(); 1428 return class_in_image; 1429 } 1430 std::string temp; 1431 const char* descriptor = klass->GetDescriptor(&temp); 1432 return IsImageClass(descriptor); 1433} 1434 1435void CompilerDriver::MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref) { 1436 MutexLock lock(self, dex_to_dex_references_lock_); 1437 // Since we're compiling one dex file at a time, we need to look for the 1438 // current dex file entry only at the end of dex_to_dex_references_. 1439 if (dex_to_dex_references_.empty() || 1440 &dex_to_dex_references_.back().GetDexFile() != method_ref.dex_file) { 1441 dex_to_dex_references_.emplace_back(*method_ref.dex_file); 1442 } 1443 dex_to_dex_references_.back().GetMethodIndexes().SetBit(method_ref.dex_method_index); 1444} 1445 1446bool CompilerDriver::CanAccessTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class, 1447 ObjPtr<mirror::Class> resolved_class) { 1448 if (resolved_class == nullptr) { 1449 stats_->TypeNeedsAccessCheck(); 1450 return false; // Unknown class needs access checks. 1451 } 1452 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1453 if (!is_accessible) { 1454 if (referrer_class == nullptr) { 1455 stats_->TypeNeedsAccessCheck(); 1456 return false; // Incomplete referrer knowledge needs access check. 1457 } 1458 // Perform access check, will return true if access is ok or false if we're going to have to 1459 // check this at runtime (for example for class loaders). 1460 is_accessible = referrer_class->CanAccess(resolved_class); 1461 } 1462 if (is_accessible) { 1463 stats_->TypeDoesntNeedAccessCheck(); 1464 } else { 1465 stats_->TypeNeedsAccessCheck(); 1466 } 1467 return is_accessible; 1468} 1469 1470bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class, 1471 ObjPtr<mirror::Class> resolved_class, 1472 bool* finalizable) { 1473 if (resolved_class == nullptr) { 1474 stats_->TypeNeedsAccessCheck(); 1475 // Be conservative. 1476 *finalizable = true; 1477 return false; // Unknown class needs access checks. 1478 } 1479 *finalizable = resolved_class->IsFinalizable(); 1480 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1481 if (!is_accessible) { 1482 if (referrer_class == nullptr) { 1483 stats_->TypeNeedsAccessCheck(); 1484 return false; // Incomplete referrer knowledge needs access check. 1485 } 1486 // Perform access and instantiable checks, will return true if access is ok or false if we're 1487 // going to have to check this at runtime (for example for class loaders). 1488 is_accessible = referrer_class->CanAccess(resolved_class); 1489 } 1490 bool result = is_accessible && resolved_class->IsInstantiable(); 1491 if (result) { 1492 stats_->TypeDoesntNeedAccessCheck(); 1493 } else { 1494 stats_->TypeNeedsAccessCheck(); 1495 } 1496 return result; 1497} 1498 1499void CompilerDriver::ProcessedInstanceField(bool resolved) { 1500 if (!resolved) { 1501 stats_->UnresolvedInstanceField(); 1502 } else { 1503 stats_->ResolvedInstanceField(); 1504 } 1505} 1506 1507void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1508 if (!resolved) { 1509 stats_->UnresolvedStaticField(); 1510 } else if (local) { 1511 stats_->ResolvedLocalStaticField(); 1512 } else { 1513 stats_->ResolvedStaticField(); 1514 } 1515} 1516 1517ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1518 const DexCompilationUnit* mUnit, bool is_put, 1519 const ScopedObjectAccess& soa) { 1520 // Try to resolve the field and compiling method's class. 1521 ArtField* resolved_field; 1522 mirror::Class* referrer_class; 1523 Handle<mirror::DexCache> dex_cache(mUnit->GetDexCache()); 1524 { 1525 Handle<mirror::ClassLoader> class_loader_handle = mUnit->GetClassLoader(); 1526 resolved_field = ResolveField(soa, dex_cache, class_loader_handle, mUnit, field_idx, false); 1527 referrer_class = resolved_field != nullptr 1528 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader_handle, mUnit) : nullptr; 1529 } 1530 bool can_link = false; 1531 if (resolved_field != nullptr && referrer_class != nullptr) { 1532 std::pair<bool, bool> fast_path = IsFastInstanceField( 1533 dex_cache.Get(), referrer_class, resolved_field, field_idx); 1534 can_link = is_put ? fast_path.second : fast_path.first; 1535 } 1536 ProcessedInstanceField(can_link); 1537 return can_link ? resolved_field : nullptr; 1538} 1539 1540bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1541 bool is_put, MemberOffset* field_offset, 1542 bool* is_volatile) { 1543 ScopedObjectAccess soa(Thread::Current()); 1544 ArtField* resolved_field = ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa); 1545 1546 if (resolved_field == nullptr) { 1547 // Conservative defaults. 1548 *is_volatile = true; 1549 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1550 return false; 1551 } else { 1552 *is_volatile = resolved_field->IsVolatile(); 1553 *field_offset = resolved_field->GetOffset(); 1554 return true; 1555 } 1556} 1557 1558const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1559 uint32_t method_idx) const { 1560 MethodReference ref(dex_file, method_idx); 1561 return verification_results_->GetVerifiedMethod(ref); 1562} 1563 1564bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1565 if (!compiler_options_->IsVerificationEnabled()) { 1566 // If we didn't verify, every cast has to be treated as non-safe. 1567 return false; 1568 } 1569 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1570 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1571 if (result) { 1572 stats_->SafeCast(); 1573 } else { 1574 stats_->NotASafeCast(); 1575 } 1576 return result; 1577} 1578 1579class CompilationVisitor { 1580 public: 1581 virtual ~CompilationVisitor() {} 1582 virtual void Visit(size_t index) = 0; 1583}; 1584 1585class ParallelCompilationManager { 1586 public: 1587 ParallelCompilationManager(ClassLinker* class_linker, 1588 jobject class_loader, 1589 CompilerDriver* compiler, 1590 const DexFile* dex_file, 1591 const std::vector<const DexFile*>& dex_files, 1592 ThreadPool* thread_pool) 1593 : index_(0), 1594 class_linker_(class_linker), 1595 class_loader_(class_loader), 1596 compiler_(compiler), 1597 dex_file_(dex_file), 1598 dex_files_(dex_files), 1599 thread_pool_(thread_pool) {} 1600 1601 ClassLinker* GetClassLinker() const { 1602 CHECK(class_linker_ != nullptr); 1603 return class_linker_; 1604 } 1605 1606 jobject GetClassLoader() const { 1607 return class_loader_; 1608 } 1609 1610 CompilerDriver* GetCompiler() const { 1611 CHECK(compiler_ != nullptr); 1612 return compiler_; 1613 } 1614 1615 const DexFile* GetDexFile() const { 1616 CHECK(dex_file_ != nullptr); 1617 return dex_file_; 1618 } 1619 1620 const std::vector<const DexFile*>& GetDexFiles() const { 1621 return dex_files_; 1622 } 1623 1624 void ForAll(size_t begin, size_t end, CompilationVisitor* visitor, size_t work_units) 1625 REQUIRES(!*Locks::mutator_lock_) { 1626 Thread* self = Thread::Current(); 1627 self->AssertNoPendingException(); 1628 CHECK_GT(work_units, 0U); 1629 1630 index_.StoreRelaxed(begin); 1631 for (size_t i = 0; i < work_units; ++i) { 1632 thread_pool_->AddTask(self, new ForAllClosure(this, end, visitor)); 1633 } 1634 thread_pool_->StartWorkers(self); 1635 1636 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1637 // thread destructor's called below perform join). 1638 CHECK_NE(self->GetState(), kRunnable); 1639 1640 // Wait for all the worker threads to finish. 1641 thread_pool_->Wait(self, true, false); 1642 1643 // And stop the workers accepting jobs. 1644 thread_pool_->StopWorkers(self); 1645 } 1646 1647 size_t NextIndex() { 1648 return index_.FetchAndAddSequentiallyConsistent(1); 1649 } 1650 1651 private: 1652 class ForAllClosure : public Task { 1653 public: 1654 ForAllClosure(ParallelCompilationManager* manager, size_t end, CompilationVisitor* visitor) 1655 : manager_(manager), 1656 end_(end), 1657 visitor_(visitor) {} 1658 1659 virtual void Run(Thread* self) { 1660 while (true) { 1661 const size_t index = manager_->NextIndex(); 1662 if (UNLIKELY(index >= end_)) { 1663 break; 1664 } 1665 visitor_->Visit(index); 1666 self->AssertNoPendingException(); 1667 } 1668 } 1669 1670 virtual void Finalize() { 1671 delete this; 1672 } 1673 1674 private: 1675 ParallelCompilationManager* const manager_; 1676 const size_t end_; 1677 CompilationVisitor* const visitor_; 1678 }; 1679 1680 AtomicInteger index_; 1681 ClassLinker* const class_linker_; 1682 const jobject class_loader_; 1683 CompilerDriver* const compiler_; 1684 const DexFile* const dex_file_; 1685 const std::vector<const DexFile*>& dex_files_; 1686 ThreadPool* const thread_pool_; 1687 1688 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1689}; 1690 1691// A fast version of SkipClass above if the class pointer is available 1692// that avoids the expensive FindInClassPath search. 1693static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1694 REQUIRES_SHARED(Locks::mutator_lock_) { 1695 DCHECK(klass != nullptr); 1696 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1697 if (&dex_file != &original_dex_file) { 1698 if (class_loader == nullptr) { 1699 LOG(WARNING) << "Skipping class " << klass->PrettyDescriptor() << " from " 1700 << dex_file.GetLocation() << " previously found in " 1701 << original_dex_file.GetLocation(); 1702 } 1703 return true; 1704 } 1705 return false; 1706} 1707 1708static void CheckAndClearResolveException(Thread* self) 1709 REQUIRES_SHARED(Locks::mutator_lock_) { 1710 CHECK(self->IsExceptionPending()); 1711 mirror::Throwable* exception = self->GetException(); 1712 std::string temp; 1713 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1714 const char* expected_exceptions[] = { 1715 "Ljava/lang/IllegalAccessError;", 1716 "Ljava/lang/IncompatibleClassChangeError;", 1717 "Ljava/lang/InstantiationError;", 1718 "Ljava/lang/LinkageError;", 1719 "Ljava/lang/NoClassDefFoundError;", 1720 "Ljava/lang/NoSuchFieldError;", 1721 "Ljava/lang/NoSuchMethodError;" 1722 }; 1723 bool found = false; 1724 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1725 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1726 found = true; 1727 } 1728 } 1729 if (!found) { 1730 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1731 } 1732 self->ClearException(); 1733} 1734 1735bool CompilerDriver::RequiresConstructorBarrier(const DexFile& dex_file, 1736 uint16_t class_def_idx) const { 1737 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx); 1738 const uint8_t* class_data = dex_file.GetClassData(class_def); 1739 if (class_data == nullptr) { 1740 // Empty class such as a marker interface. 1741 return false; 1742 } 1743 ClassDataItemIterator it(dex_file, class_data); 1744 while (it.HasNextStaticField()) { 1745 it.Next(); 1746 } 1747 // We require a constructor barrier if there are final instance fields. 1748 while (it.HasNextInstanceField()) { 1749 if (it.MemberIsFinal()) { 1750 return true; 1751 } 1752 it.Next(); 1753 } 1754 return false; 1755} 1756 1757class ResolveClassFieldsAndMethodsVisitor : public CompilationVisitor { 1758 public: 1759 explicit ResolveClassFieldsAndMethodsVisitor(const ParallelCompilationManager* manager) 1760 : manager_(manager) {} 1761 1762 void Visit(size_t class_def_index) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1763 ATRACE_CALL(); 1764 Thread* const self = Thread::Current(); 1765 jobject jclass_loader = manager_->GetClassLoader(); 1766 const DexFile& dex_file = *manager_->GetDexFile(); 1767 ClassLinker* class_linker = manager_->GetClassLinker(); 1768 1769 // If an instance field is final then we need to have a barrier on the return, static final 1770 // fields are assigned within the lock held for class initialization. Conservatively assume 1771 // constructor barriers are always required. 1772 bool requires_constructor_barrier = true; 1773 1774 // Method and Field are the worst. We can't resolve without either 1775 // context from the code use (to disambiguate virtual vs direct 1776 // method and instance vs static field) or from class 1777 // definitions. While the compiler will resolve what it can as it 1778 // needs it, here we try to resolve fields and methods used in class 1779 // definitions, since many of them many never be referenced by 1780 // generated code. 1781 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1782 ScopedObjectAccess soa(self); 1783 StackHandleScope<2> hs(soa.Self()); 1784 Handle<mirror::ClassLoader> class_loader( 1785 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 1786 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 1787 soa.Self(), dex_file))); 1788 // Resolve the class. 1789 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1790 class_loader); 1791 bool resolve_fields_and_methods; 1792 if (klass == nullptr) { 1793 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1794 // attempt to resolve methods and fields when there is no declaring class. 1795 CheckAndClearResolveException(soa.Self()); 1796 resolve_fields_and_methods = false; 1797 } else { 1798 // We successfully resolved a class, should we skip it? 1799 if (SkipClass(jclass_loader, dex_file, klass)) { 1800 return; 1801 } 1802 // We want to resolve the methods and fields eagerly. 1803 resolve_fields_and_methods = true; 1804 } 1805 // Note the class_data pointer advances through the headers, 1806 // static fields, instance fields, direct methods, and virtual 1807 // methods. 1808 const uint8_t* class_data = dex_file.GetClassData(class_def); 1809 if (class_data == nullptr) { 1810 // Empty class such as a marker interface. 1811 requires_constructor_barrier = false; 1812 } else { 1813 ClassDataItemIterator it(dex_file, class_data); 1814 while (it.HasNextStaticField()) { 1815 if (resolve_fields_and_methods) { 1816 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1817 dex_cache, class_loader, true); 1818 if (field == nullptr) { 1819 CheckAndClearResolveException(soa.Self()); 1820 } 1821 } 1822 it.Next(); 1823 } 1824 // We require a constructor barrier if there are final instance fields. 1825 requires_constructor_barrier = false; 1826 while (it.HasNextInstanceField()) { 1827 if (it.MemberIsFinal()) { 1828 requires_constructor_barrier = true; 1829 } 1830 if (resolve_fields_and_methods) { 1831 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1832 dex_cache, class_loader, false); 1833 if (field == nullptr) { 1834 CheckAndClearResolveException(soa.Self()); 1835 } 1836 } 1837 it.Next(); 1838 } 1839 if (resolve_fields_and_methods) { 1840 while (it.HasNextDirectMethod()) { 1841 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1842 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1843 it.GetMethodInvokeType(class_def)); 1844 if (method == nullptr) { 1845 CheckAndClearResolveException(soa.Self()); 1846 } 1847 it.Next(); 1848 } 1849 while (it.HasNextVirtualMethod()) { 1850 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1851 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1852 it.GetMethodInvokeType(class_def)); 1853 if (method == nullptr) { 1854 CheckAndClearResolveException(soa.Self()); 1855 } 1856 it.Next(); 1857 } 1858 DCHECK(!it.HasNext()); 1859 } 1860 } 1861 manager_->GetCompiler()->SetRequiresConstructorBarrier(self, 1862 &dex_file, 1863 class_def_index, 1864 requires_constructor_barrier); 1865 } 1866 1867 private: 1868 const ParallelCompilationManager* const manager_; 1869}; 1870 1871class ResolveTypeVisitor : public CompilationVisitor { 1872 public: 1873 explicit ResolveTypeVisitor(const ParallelCompilationManager* manager) : manager_(manager) { 1874 } 1875 void Visit(size_t type_idx) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1876 // Class derived values are more complicated, they require the linker and loader. 1877 ScopedObjectAccess soa(Thread::Current()); 1878 ClassLinker* class_linker = manager_->GetClassLinker(); 1879 const DexFile& dex_file = *manager_->GetDexFile(); 1880 StackHandleScope<2> hs(soa.Self()); 1881 Handle<mirror::ClassLoader> class_loader( 1882 hs.NewHandle(soa.Decode<mirror::ClassLoader>(manager_->GetClassLoader()))); 1883 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->RegisterDexFile( 1884 dex_file, 1885 class_loader.Get()))); 1886 ObjPtr<mirror::Class> klass = (dex_cache.Get() != nullptr) 1887 ? class_linker->ResolveType(dex_file, dex::TypeIndex(type_idx), dex_cache, class_loader) 1888 : nullptr; 1889 1890 if (klass == nullptr) { 1891 soa.Self()->AssertPendingException(); 1892 mirror::Throwable* exception = soa.Self()->GetException(); 1893 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1894 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 1895 // There's little point continuing compilation if the heap is exhausted. 1896 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1897 } 1898 soa.Self()->ClearException(); 1899 } 1900 } 1901 1902 private: 1903 const ParallelCompilationManager* const manager_; 1904}; 1905 1906void CompilerDriver::ResolveDexFile(jobject class_loader, 1907 const DexFile& dex_file, 1908 const std::vector<const DexFile*>& dex_files, 1909 ThreadPool* thread_pool, 1910 size_t thread_count, 1911 TimingLogger* timings) { 1912 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1913 1914 // TODO: we could resolve strings here, although the string table is largely filled with class 1915 // and method names. 1916 1917 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1918 thread_pool); 1919 if (GetCompilerOptions().IsBootImage()) { 1920 // For images we resolve all types, such as array, whereas for applications just those with 1921 // classdefs are resolved by ResolveClassFieldsAndMethods. 1922 TimingLogger::ScopedTiming t("Resolve Types", timings); 1923 ResolveTypeVisitor visitor(&context); 1924 context.ForAll(0, dex_file.NumTypeIds(), &visitor, thread_count); 1925 } 1926 1927 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 1928 ResolveClassFieldsAndMethodsVisitor visitor(&context); 1929 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 1930} 1931 1932void CompilerDriver::SetVerified(jobject class_loader, 1933 const std::vector<const DexFile*>& dex_files, 1934 TimingLogger* timings) { 1935 // This can be run in parallel. 1936 for (const DexFile* dex_file : dex_files) { 1937 CHECK(dex_file != nullptr); 1938 SetVerifiedDexFile(class_loader, 1939 *dex_file, 1940 dex_files, 1941 parallel_thread_pool_.get(), 1942 parallel_thread_count_, 1943 timings); 1944 } 1945} 1946 1947static void PopulateVerifiedMethods(const DexFile& dex_file, 1948 uint32_t class_def_index, 1949 VerificationResults* verification_results) { 1950 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1951 const uint8_t* class_data = dex_file.GetClassData(class_def); 1952 if (class_data == nullptr) { 1953 return; 1954 } 1955 ClassDataItemIterator it(dex_file, class_data); 1956 // Skip fields 1957 while (it.HasNextStaticField()) { 1958 it.Next(); 1959 } 1960 while (it.HasNextInstanceField()) { 1961 it.Next(); 1962 } 1963 1964 while (it.HasNextDirectMethod()) { 1965 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1966 it.Next(); 1967 } 1968 1969 while (it.HasNextVirtualMethod()) { 1970 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1971 it.Next(); 1972 } 1973 DCHECK(!it.HasNext()); 1974} 1975 1976static void LoadAndUpdateStatus(const DexFile& dex_file, 1977 const DexFile::ClassDef& class_def, 1978 mirror::Class::Status status, 1979 Handle<mirror::ClassLoader> class_loader, 1980 Thread* self) 1981 REQUIRES_SHARED(Locks::mutator_lock_) { 1982 StackHandleScope<1> hs(self); 1983 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1984 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1985 Handle<mirror::Class> cls(hs.NewHandle<mirror::Class>( 1986 class_linker->FindClass(self, descriptor, class_loader))); 1987 if (cls.Get() != nullptr) { 1988 // Check that the class is resolved with the current dex file. We might get 1989 // a boot image class, or a class in a different dex file for multidex, and 1990 // we should not update the status in that case. 1991 if (&cls->GetDexFile() == &dex_file) { 1992 ObjectLock<mirror::Class> lock(self, cls); 1993 mirror::Class::SetStatus(cls, status, self); 1994 } 1995 } else { 1996 DCHECK(self->IsExceptionPending()); 1997 self->ClearException(); 1998 } 1999} 2000 2001bool CompilerDriver::FastVerify(jobject jclass_loader, 2002 const std::vector<const DexFile*>& dex_files, 2003 TimingLogger* timings) { 2004 verifier::VerifierDeps* verifier_deps = 2005 Runtime::Current()->GetCompilerCallbacks()->GetVerifierDeps(); 2006 // If there is an existing `VerifierDeps`, try to use it for fast verification. 2007 if (verifier_deps == nullptr) { 2008 return false; 2009 } 2010 TimingLogger::ScopedTiming t("Fast Verify", timings); 2011 ScopedObjectAccess soa(Thread::Current()); 2012 StackHandleScope<2> hs(soa.Self()); 2013 Handle<mirror::ClassLoader> class_loader( 2014 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2015 if (!verifier_deps->ValidateDependencies(class_loader, soa.Self())) { 2016 return false; 2017 } 2018 2019 bool compiler_only_verifies = !GetCompilerOptions().IsAnyMethodCompilationEnabled(); 2020 2021 // We successfully validated the dependencies, now update class status 2022 // of verified classes. Note that the dependencies also record which classes 2023 // could not be fully verified; we could try again, but that would hurt verification 2024 // time. So instead we assume these classes still need to be verified at 2025 // runtime. 2026 for (const DexFile* dex_file : dex_files) { 2027 // Fetch the list of unverified classes and turn it into a set for faster 2028 // lookups. 2029 const std::vector<dex::TypeIndex>& unverified_classes = 2030 verifier_deps->GetUnverifiedClasses(*dex_file); 2031 std::set<dex::TypeIndex> set(unverified_classes.begin(), unverified_classes.end()); 2032 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 2033 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 2034 if (set.find(class_def.class_idx_) == set.end()) { 2035 if (compiler_only_verifies) { 2036 // Just update the compiled_classes_ map. The compiler doesn't need to resolve 2037 // the type. 2038 compiled_classes_.Overwrite( 2039 ClassReference(dex_file, i), new CompiledClass(mirror::Class::kStatusVerified)); 2040 } else { 2041 // Update the class status, so later compilation stages know they don't need to verify 2042 // the class. 2043 LoadAndUpdateStatus( 2044 *dex_file, class_def, mirror::Class::kStatusVerified, class_loader, soa.Self()); 2045 // Create `VerifiedMethod`s for each methods, the compiler expects one for 2046 // quickening or compiling. 2047 // Note that this means: 2048 // - We're only going to compile methods that did verify. 2049 // - Quickening will not do checkcast ellision. 2050 // TODO(ngeoffray): Reconsider this once we refactor compiler filters. 2051 PopulateVerifiedMethods(*dex_file, i, verification_results_); 2052 } 2053 } else if (!compiler_only_verifies) { 2054 // Make sure later compilation stages know they should not try to verify 2055 // this class again. 2056 LoadAndUpdateStatus(*dex_file, 2057 class_def, 2058 mirror::Class::kStatusRetryVerificationAtRuntime, 2059 class_loader, 2060 soa.Self()); 2061 } 2062 } 2063 } 2064 return true; 2065} 2066 2067void CompilerDriver::Verify(jobject jclass_loader, 2068 const std::vector<const DexFile*>& dex_files, 2069 TimingLogger* timings) { 2070 if (FastVerify(jclass_loader, dex_files, timings)) { 2071 return; 2072 } 2073 2074 // If there is no existing `verifier_deps` (because of non-existing vdex), or 2075 // the existing `verifier_deps` is not valid anymore, create a new one for 2076 // non boot image compilation. The verifier will need it to record the new dependencies. 2077 // Then dex2oat can update the vdex file with these new dependencies. 2078 if (!GetCompilerOptions().IsBootImage()) { 2079 // Create the main VerifierDeps, and set it to this thread. 2080 verifier::VerifierDeps* verifier_deps = new verifier::VerifierDeps(dex_files); 2081 Runtime::Current()->GetCompilerCallbacks()->SetVerifierDeps(verifier_deps); 2082 Thread::Current()->SetVerifierDeps(verifier_deps); 2083 // Create per-thread VerifierDeps to avoid contention on the main one. 2084 // We will merge them after verification. 2085 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2086 worker->GetThread()->SetVerifierDeps(new verifier::VerifierDeps(dex_files)); 2087 } 2088 } 2089 2090 // Note: verification should not be pulling in classes anymore when compiling the boot image, 2091 // as all should have been resolved before. As such, doing this in parallel should still 2092 // be deterministic. 2093 for (const DexFile* dex_file : dex_files) { 2094 CHECK(dex_file != nullptr); 2095 VerifyDexFile(jclass_loader, 2096 *dex_file, 2097 dex_files, 2098 parallel_thread_pool_.get(), 2099 parallel_thread_count_, 2100 timings); 2101 } 2102 2103 if (!GetCompilerOptions().IsBootImage()) { 2104 // Merge all VerifierDeps into the main one. 2105 verifier::VerifierDeps* verifier_deps = Thread::Current()->GetVerifierDeps(); 2106 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2107 verifier::VerifierDeps* thread_deps = worker->GetThread()->GetVerifierDeps(); 2108 worker->GetThread()->SetVerifierDeps(nullptr); 2109 verifier_deps->MergeWith(*thread_deps, dex_files);; 2110 delete thread_deps; 2111 } 2112 Thread::Current()->SetVerifierDeps(nullptr); 2113 } 2114} 2115 2116class VerifyClassVisitor : public CompilationVisitor { 2117 public: 2118 VerifyClassVisitor(const ParallelCompilationManager* manager, verifier::HardFailLogMode log_level) 2119 : manager_(manager), log_level_(log_level) {} 2120 2121 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2122 ATRACE_CALL(); 2123 ScopedObjectAccess soa(Thread::Current()); 2124 const DexFile& dex_file = *manager_->GetDexFile(); 2125 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2126 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2127 ClassLinker* class_linker = manager_->GetClassLinker(); 2128 jobject jclass_loader = manager_->GetClassLoader(); 2129 StackHandleScope<3> hs(soa.Self()); 2130 Handle<mirror::ClassLoader> class_loader( 2131 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2132 Handle<mirror::Class> klass( 2133 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2134 verifier::MethodVerifier::FailureKind failure_kind; 2135 if (klass.Get() == nullptr) { 2136 CHECK(soa.Self()->IsExceptionPending()); 2137 soa.Self()->ClearException(); 2138 2139 /* 2140 * At compile time, we can still structurally verify the class even if FindClass fails. 2141 * This is to ensure the class is structurally sound for compilation. An unsound class 2142 * will be rejected by the verifier and later skipped during compilation in the compiler. 2143 */ 2144 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 2145 soa.Self(), dex_file))); 2146 std::string error_msg; 2147 failure_kind = 2148 verifier::MethodVerifier::VerifyClass(soa.Self(), 2149 &dex_file, 2150 dex_cache, 2151 class_loader, 2152 class_def, 2153 Runtime::Current()->GetCompilerCallbacks(), 2154 true /* allow soft failures */, 2155 log_level_, 2156 &error_msg); 2157 if (failure_kind == verifier::MethodVerifier::kHardFailure) { 2158 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 2159 << " because: " << error_msg; 2160 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2161 } 2162 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 2163 CHECK(klass->IsResolved()) << klass->PrettyClass(); 2164 failure_kind = class_linker->VerifyClass(soa.Self(), klass, log_level_); 2165 2166 if (klass->IsErroneous()) { 2167 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 2168 CHECK(soa.Self()->IsExceptionPending()); 2169 soa.Self()->ClearException(); 2170 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2171 } 2172 2173 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 2174 << klass->PrettyDescriptor() << ": state=" << klass->GetStatus(); 2175 2176 // It is *very* problematic if there are verification errors in the boot classpath. For example, 2177 // we rely on things working OK without verification when the decryption dialog is brought up. 2178 // So abort in a debug build if we find this violated. 2179 if (kIsDebugBuild) { 2180 // TODO(narayan): Remove this special case for signature polymorphic 2181 // invokes once verifier support is fully implemented. 2182 if (manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2183 !android::base::StartsWith(descriptor, "Ljava/lang/invoke/")) { 2184 DCHECK(klass->IsVerified()) << "Boot classpath class " << klass->PrettyClass() 2185 << " failed to fully verify: state= " << klass->GetStatus(); 2186 } 2187 } 2188 } else { 2189 // Make the skip a soft failure, essentially being considered as verify at runtime. 2190 failure_kind = verifier::MethodVerifier::kSoftFailure; 2191 } 2192 verifier::VerifierDeps::MaybeRecordVerificationStatus( 2193 dex_file, class_def.class_idx_, failure_kind); 2194 soa.Self()->AssertNoPendingException(); 2195 } 2196 2197 private: 2198 const ParallelCompilationManager* const manager_; 2199 const verifier::HardFailLogMode log_level_; 2200}; 2201 2202void CompilerDriver::VerifyDexFile(jobject class_loader, 2203 const DexFile& dex_file, 2204 const std::vector<const DexFile*>& dex_files, 2205 ThreadPool* thread_pool, 2206 size_t thread_count, 2207 TimingLogger* timings) { 2208 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2209 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2210 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2211 thread_pool); 2212 verifier::HardFailLogMode log_level = GetCompilerOptions().AbortOnHardVerifierFailure() 2213 ? verifier::HardFailLogMode::kLogInternalFatal 2214 : verifier::HardFailLogMode::kLogWarning; 2215 VerifyClassVisitor visitor(&context, log_level); 2216 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2217} 2218 2219class SetVerifiedClassVisitor : public CompilationVisitor { 2220 public: 2221 explicit SetVerifiedClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2222 2223 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2224 ATRACE_CALL(); 2225 ScopedObjectAccess soa(Thread::Current()); 2226 const DexFile& dex_file = *manager_->GetDexFile(); 2227 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2228 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2229 ClassLinker* class_linker = manager_->GetClassLinker(); 2230 jobject jclass_loader = manager_->GetClassLoader(); 2231 StackHandleScope<3> hs(soa.Self()); 2232 Handle<mirror::ClassLoader> class_loader( 2233 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2234 Handle<mirror::Class> klass( 2235 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2236 // Class might have failed resolution. Then don't set it to verified. 2237 if (klass.Get() != nullptr) { 2238 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 2239 // very wrong. 2240 if (klass->IsResolved() && !klass->IsErroneousResolved()) { 2241 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 2242 ObjectLock<mirror::Class> lock(soa.Self(), klass); 2243 // Set class status to verified. 2244 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, soa.Self()); 2245 // Mark methods as pre-verified. If we don't do this, the interpreter will run with 2246 // access checks. 2247 klass->SetSkipAccessChecksFlagOnAllMethods( 2248 GetInstructionSetPointerSize(manager_->GetCompiler()->GetInstructionSet())); 2249 klass->SetVerificationAttempted(); 2250 } 2251 // Record the final class status if necessary. 2252 ClassReference ref(manager_->GetDexFile(), class_def_index); 2253 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2254 } 2255 } else { 2256 Thread* self = soa.Self(); 2257 DCHECK(self->IsExceptionPending()); 2258 self->ClearException(); 2259 } 2260 } 2261 2262 private: 2263 const ParallelCompilationManager* const manager_; 2264}; 2265 2266void CompilerDriver::SetVerifiedDexFile(jobject class_loader, 2267 const DexFile& dex_file, 2268 const std::vector<const DexFile*>& dex_files, 2269 ThreadPool* thread_pool, 2270 size_t thread_count, 2271 TimingLogger* timings) { 2272 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2273 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2274 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2275 thread_pool); 2276 SetVerifiedClassVisitor visitor(&context); 2277 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2278} 2279 2280class InitializeClassVisitor : public CompilationVisitor { 2281 public: 2282 explicit InitializeClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2283 2284 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2285 ATRACE_CALL(); 2286 jobject jclass_loader = manager_->GetClassLoader(); 2287 const DexFile& dex_file = *manager_->GetDexFile(); 2288 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2289 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 2290 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 2291 2292 ScopedObjectAccess soa(Thread::Current()); 2293 StackHandleScope<3> hs(soa.Self()); 2294 Handle<mirror::ClassLoader> class_loader( 2295 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2296 Handle<mirror::Class> klass( 2297 hs.NewHandle(manager_->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 2298 2299 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 2300 // Only try to initialize classes that were successfully verified. 2301 if (klass->IsVerified()) { 2302 // Attempt to initialize the class but bail if we either need to initialize the super-class 2303 // or static fields. 2304 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, false); 2305 if (!klass->IsInitialized()) { 2306 // We don't want non-trivial class initialization occurring on multiple threads due to 2307 // deadlock problems. For example, a parent class is initialized (holding its lock) that 2308 // refers to a sub-class in its static/class initializer causing it to try to acquire the 2309 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 2310 // after first initializing its parents, whose locks are acquired. This leads to a 2311 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 2312 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 2313 // than use a special Object for the purpose we use the Class of java.lang.Class. 2314 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 2315 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 2316 // Attempt to initialize allowing initialization of parent classes but still not static 2317 // fields. 2318 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, true); 2319 if (!klass->IsInitialized()) { 2320 // We need to initialize static fields, we only do this for image classes that aren't 2321 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 2322 bool can_init_static_fields = 2323 manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2324 manager_->GetCompiler()->IsImageClass(descriptor) && 2325 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 2326 if (can_init_static_fields) { 2327 VLOG(compiler) << "Initializing: " << descriptor; 2328 // TODO multithreading support. We should ensure the current compilation thread has 2329 // exclusive access to the runtime and the transaction. To achieve this, we could use 2330 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 2331 // checks in Thread::AssertThreadSuspensionIsAllowable. 2332 Runtime* const runtime = Runtime::Current(); 2333 Transaction transaction; 2334 2335 // Run the class initializer in transaction mode. 2336 runtime->EnterTransactionMode(&transaction); 2337 const mirror::Class::Status old_status = klass->GetStatus(); 2338 bool success = manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, true, 2339 true); 2340 // TODO we detach transaction from runtime to indicate we quit the transactional 2341 // mode which prevents the GC from visiting objects modified during the transaction. 2342 // Ensure GC is not run so don't access freed objects when aborting transaction. 2343 2344 ScopedAssertNoThreadSuspension ants("Transaction end"); 2345 runtime->ExitTransactionMode(); 2346 2347 if (!success) { 2348 CHECK(soa.Self()->IsExceptionPending()); 2349 mirror::Throwable* exception = soa.Self()->GetException(); 2350 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 2351 << exception->Dump(); 2352 std::ostream* file_log = manager_->GetCompiler()-> 2353 GetCompilerOptions().GetInitFailureOutput(); 2354 if (file_log != nullptr) { 2355 *file_log << descriptor << "\n"; 2356 *file_log << exception->Dump() << "\n"; 2357 } 2358 soa.Self()->ClearException(); 2359 transaction.Rollback(); 2360 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 2361 } 2362 } 2363 } 2364 soa.Self()->AssertNoPendingException(); 2365 } 2366 } 2367 // Record the final class status if necessary. 2368 ClassReference ref(manager_->GetDexFile(), class_def_index); 2369 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2370 } 2371 // Clear any class not found or verification exceptions. 2372 soa.Self()->ClearException(); 2373 } 2374 2375 private: 2376 const ParallelCompilationManager* const manager_; 2377}; 2378 2379void CompilerDriver::InitializeClasses(jobject jni_class_loader, 2380 const DexFile& dex_file, 2381 const std::vector<const DexFile*>& dex_files, 2382 TimingLogger* timings) { 2383 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 2384 2385 // Initialization allocates objects and needs to run single-threaded to be deterministic. 2386 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 2387 ThreadPool* init_thread_pool = force_determinism 2388 ? single_thread_pool_.get() 2389 : parallel_thread_pool_.get(); 2390 size_t init_thread_count = force_determinism ? 1U : parallel_thread_count_; 2391 2392 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2393 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 2394 init_thread_pool); 2395 if (GetCompilerOptions().IsBootImage()) { 2396 // TODO: remove this when transactional mode supports multithreading. 2397 init_thread_count = 1U; 2398 } 2399 InitializeClassVisitor visitor(&context); 2400 context.ForAll(0, dex_file.NumClassDefs(), &visitor, init_thread_count); 2401} 2402 2403class InitializeArrayClassesAndCreateConflictTablesVisitor : public ClassVisitor { 2404 public: 2405 explicit InitializeArrayClassesAndCreateConflictTablesVisitor(VariableSizedHandleScope& hs) 2406 : hs_(hs) {} 2407 2408 virtual bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE 2409 REQUIRES_SHARED(Locks::mutator_lock_) { 2410 if (Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(klass)) { 2411 return true; 2412 } 2413 if (klass->IsArrayClass()) { 2414 StackHandleScope<1> hs(Thread::Current()); 2415 auto h_klass = hs.NewHandleWrapper(&klass); 2416 Runtime::Current()->GetClassLinker()->EnsureInitialized(hs.Self(), h_klass, true, true); 2417 } 2418 // Collect handles since there may be thread suspension in future EnsureInitialized. 2419 to_visit_.push_back(hs_.NewHandle(klass)); 2420 return true; 2421 } 2422 2423 void FillAllIMTAndConflictTables() REQUIRES_SHARED(Locks::mutator_lock_) { 2424 for (Handle<mirror::Class> c : to_visit_) { 2425 // Create the conflict tables. 2426 FillIMTAndConflictTables(c.Get()); 2427 } 2428 } 2429 2430 private: 2431 void FillIMTAndConflictTables(ObjPtr<mirror::Class> klass) 2432 REQUIRES_SHARED(Locks::mutator_lock_) { 2433 if (!klass->ShouldHaveImt()) { 2434 return; 2435 } 2436 if (visited_classes_.find(klass) != visited_classes_.end()) { 2437 return; 2438 } 2439 if (klass->HasSuperClass()) { 2440 FillIMTAndConflictTables(klass->GetSuperClass()); 2441 } 2442 if (!klass->IsTemp()) { 2443 Runtime::Current()->GetClassLinker()->FillIMTAndConflictTables(klass); 2444 } 2445 visited_classes_.insert(klass); 2446 } 2447 2448 VariableSizedHandleScope& hs_; 2449 std::vector<Handle<mirror::Class>> to_visit_; 2450 std::unordered_set<ObjPtr<mirror::Class>, HashObjPtr> visited_classes_; 2451}; 2452 2453void CompilerDriver::InitializeClasses(jobject class_loader, 2454 const std::vector<const DexFile*>& dex_files, 2455 TimingLogger* timings) { 2456 for (size_t i = 0; i != dex_files.size(); ++i) { 2457 const DexFile* dex_file = dex_files[i]; 2458 CHECK(dex_file != nullptr); 2459 InitializeClasses(class_loader, *dex_file, dex_files, timings); 2460 } 2461 if (GetCompilerOptions().IsBootImage() || GetCompilerOptions().IsAppImage()) { 2462 // Make sure that we call EnsureIntiailized on all the array classes to call 2463 // SetVerificationAttempted so that the access flags are set. If we do not do this they get 2464 // changed at runtime resulting in more dirty image pages. 2465 // Also create conflict tables. 2466 // Only useful if we are compiling an image (image_classes_ is not null). 2467 ScopedObjectAccess soa(Thread::Current()); 2468 VariableSizedHandleScope hs(soa.Self()); 2469 InitializeArrayClassesAndCreateConflictTablesVisitor visitor(hs); 2470 Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&visitor); 2471 visitor.FillAllIMTAndConflictTables(); 2472 } 2473 if (GetCompilerOptions().IsBootImage()) { 2474 // Prune garbage objects created during aborted transactions. 2475 Runtime::Current()->GetHeap()->CollectGarbage(true); 2476 } 2477} 2478 2479void CompilerDriver::Compile(jobject class_loader, 2480 const std::vector<const DexFile*>& dex_files, 2481 TimingLogger* timings) { 2482 if (kDebugProfileGuidedCompilation) { 2483 LOG(INFO) << "[ProfileGuidedCompilation] " << 2484 ((profile_compilation_info_ == nullptr) 2485 ? "null" 2486 : profile_compilation_info_->DumpInfo(&dex_files)); 2487 } 2488 2489 DCHECK(current_dex_to_dex_methods_ == nullptr); 2490 for (const DexFile* dex_file : dex_files) { 2491 CHECK(dex_file != nullptr); 2492 CompileDexFile(class_loader, 2493 *dex_file, 2494 dex_files, 2495 parallel_thread_pool_.get(), 2496 parallel_thread_count_, 2497 timings); 2498 const ArenaPool* const arena_pool = Runtime::Current()->GetArenaPool(); 2499 const size_t arena_alloc = arena_pool->GetBytesAllocated(); 2500 max_arena_alloc_ = std::max(arena_alloc, max_arena_alloc_); 2501 Runtime::Current()->ReclaimArenaPoolMemory(); 2502 } 2503 2504 ArrayRef<DexFileMethodSet> dex_to_dex_references; 2505 { 2506 // From this point on, we shall not modify dex_to_dex_references_, so 2507 // just grab a reference to it that we use without holding the mutex. 2508 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 2509 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 2510 } 2511 for (const auto& method_set : dex_to_dex_references) { 2512 current_dex_to_dex_methods_ = &method_set.GetMethodIndexes(); 2513 CompileDexFile(class_loader, 2514 method_set.GetDexFile(), 2515 dex_files, 2516 parallel_thread_pool_.get(), 2517 parallel_thread_count_, 2518 timings); 2519 } 2520 current_dex_to_dex_methods_ = nullptr; 2521 2522 VLOG(compiler) << "Compile: " << GetMemoryUsageString(false); 2523} 2524 2525class CompileClassVisitor : public CompilationVisitor { 2526 public: 2527 explicit CompileClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2528 2529 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2530 ATRACE_CALL(); 2531 const DexFile& dex_file = *manager_->GetDexFile(); 2532 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2533 ClassLinker* class_linker = manager_->GetClassLinker(); 2534 jobject jclass_loader = manager_->GetClassLoader(); 2535 ClassReference ref(&dex_file, class_def_index); 2536 // Skip compiling classes with generic verifier failures since they will still fail at runtime 2537 if (manager_->GetCompiler()->verification_results_->IsClassRejected(ref)) { 2538 return; 2539 } 2540 // Use a scoped object access to perform to the quick SkipClass check. 2541 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2542 ScopedObjectAccess soa(Thread::Current()); 2543 StackHandleScope<3> hs(soa.Self()); 2544 Handle<mirror::ClassLoader> class_loader( 2545 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2546 Handle<mirror::Class> klass( 2547 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2548 Handle<mirror::DexCache> dex_cache; 2549 if (klass.Get() == nullptr) { 2550 soa.Self()->AssertPendingException(); 2551 soa.Self()->ClearException(); 2552 dex_cache = hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file)); 2553 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 2554 return; 2555 } else { 2556 dex_cache = hs.NewHandle(klass->GetDexCache()); 2557 } 2558 2559 const uint8_t* class_data = dex_file.GetClassData(class_def); 2560 if (class_data == nullptr) { 2561 // empty class, probably a marker interface 2562 return; 2563 } 2564 2565 // Go to native so that we don't block GC during compilation. 2566 ScopedThreadSuspension sts(soa.Self(), kNative); 2567 2568 CompilerDriver* const driver = manager_->GetCompiler(); 2569 2570 // Can we run DEX-to-DEX compiler on this class ? 2571 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 2572 GetDexToDexCompilationLevel(soa.Self(), *driver, jclass_loader, dex_file, class_def); 2573 2574 ClassDataItemIterator it(dex_file, class_data); 2575 // Skip fields 2576 while (it.HasNextStaticField()) { 2577 it.Next(); 2578 } 2579 while (it.HasNextInstanceField()) { 2580 it.Next(); 2581 } 2582 2583 bool compilation_enabled = driver->IsClassToCompile( 2584 dex_file.StringByTypeIdx(class_def.class_idx_)); 2585 2586 // Compile direct methods 2587 int64_t previous_direct_method_idx = -1; 2588 while (it.HasNextDirectMethod()) { 2589 uint32_t method_idx = it.GetMemberIndex(); 2590 if (method_idx == previous_direct_method_idx) { 2591 // smali can create dex files with two encoded_methods sharing the same method_idx 2592 // http://code.google.com/p/smali/issues/detail?id=119 2593 it.Next(); 2594 continue; 2595 } 2596 previous_direct_method_idx = method_idx; 2597 CompileMethod(soa.Self(), 2598 driver, 2599 it.GetMethodCodeItem(), 2600 it.GetMethodAccessFlags(), 2601 it.GetMethodInvokeType(class_def), 2602 class_def_index, 2603 method_idx, 2604 class_loader, 2605 dex_file, 2606 dex_to_dex_compilation_level, 2607 compilation_enabled, 2608 dex_cache); 2609 it.Next(); 2610 } 2611 // Compile virtual methods 2612 int64_t previous_virtual_method_idx = -1; 2613 while (it.HasNextVirtualMethod()) { 2614 uint32_t method_idx = it.GetMemberIndex(); 2615 if (method_idx == previous_virtual_method_idx) { 2616 // smali can create dex files with two encoded_methods sharing the same method_idx 2617 // http://code.google.com/p/smali/issues/detail?id=119 2618 it.Next(); 2619 continue; 2620 } 2621 previous_virtual_method_idx = method_idx; 2622 CompileMethod(soa.Self(), 2623 driver, it.GetMethodCodeItem(), 2624 it.GetMethodAccessFlags(), 2625 it.GetMethodInvokeType(class_def), 2626 class_def_index, 2627 method_idx, 2628 class_loader, 2629 dex_file, 2630 dex_to_dex_compilation_level, 2631 compilation_enabled, 2632 dex_cache); 2633 it.Next(); 2634 } 2635 DCHECK(!it.HasNext()); 2636 } 2637 2638 private: 2639 const ParallelCompilationManager* const manager_; 2640}; 2641 2642void CompilerDriver::CompileDexFile(jobject class_loader, 2643 const DexFile& dex_file, 2644 const std::vector<const DexFile*>& dex_files, 2645 ThreadPool* thread_pool, 2646 size_t thread_count, 2647 TimingLogger* timings) { 2648 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2649 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2650 &dex_file, dex_files, thread_pool); 2651 CompileClassVisitor visitor(&context); 2652 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2653} 2654 2655void CompilerDriver::AddCompiledMethod(const MethodReference& method_ref, 2656 CompiledMethod* const compiled_method, 2657 size_t non_relative_linker_patch_count) { 2658 DCHECK(GetCompiledMethod(method_ref) == nullptr) 2659 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2660 MethodTable::InsertResult result = compiled_methods_.Insert(method_ref, 2661 /*expected*/ nullptr, 2662 compiled_method); 2663 CHECK(result == MethodTable::kInsertResultSuccess); 2664 non_relative_linker_patch_count_.FetchAndAddRelaxed(non_relative_linker_patch_count); 2665 DCHECK(GetCompiledMethod(method_ref) != nullptr) 2666 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2667} 2668 2669CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2670 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2671 ClassTable::const_iterator it = compiled_classes_.find(ref); 2672 if (it == compiled_classes_.end()) { 2673 return nullptr; 2674 } 2675 CHECK(it->second != nullptr); 2676 return it->second; 2677} 2678 2679void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2680 switch (status) { 2681 case mirror::Class::kStatusNotReady: 2682 case mirror::Class::kStatusErrorResolved: 2683 case mirror::Class::kStatusErrorUnresolved: 2684 case mirror::Class::kStatusRetryVerificationAtRuntime: 2685 case mirror::Class::kStatusVerified: 2686 case mirror::Class::kStatusInitialized: 2687 case mirror::Class::kStatusResolved: 2688 break; // Expected states. 2689 default: 2690 LOG(FATAL) << "Unexpected class status for class " 2691 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2692 << " of " << status; 2693 } 2694 2695 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2696 auto it = compiled_classes_.find(ref); 2697 if (it == compiled_classes_.end()) { 2698 CompiledClass* compiled_class = new CompiledClass(status); 2699 compiled_classes_.Overwrite(ref, compiled_class); 2700 } else if (status > it->second->GetStatus()) { 2701 // Update the status if we now have a greater one. This happens with vdex, 2702 // which records a class is verified, but does not resolve it. 2703 it->second->SetStatus(status); 2704 } 2705} 2706 2707CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2708 CompiledMethod* compiled_method = nullptr; 2709 compiled_methods_.Get(ref, &compiled_method); 2710 return compiled_method; 2711} 2712 2713bool CompilerDriver::IsMethodVerifiedWithoutFailures(uint32_t method_idx, 2714 uint16_t class_def_idx, 2715 const DexFile& dex_file) const { 2716 const VerifiedMethod* verified_method = GetVerifiedMethod(&dex_file, method_idx); 2717 if (verified_method != nullptr) { 2718 return !verified_method->HasVerificationFailures(); 2719 } 2720 2721 // If we can't find verification metadata, check if this is a system class (we trust that system 2722 // classes have their methods verified). If it's not, be conservative and assume the method 2723 // has not been verified successfully. 2724 2725 // TODO: When compiling the boot image it should be safe to assume that everything is verified, 2726 // even if methods are not found in the verification cache. 2727 const char* descriptor = dex_file.GetClassDescriptor(dex_file.GetClassDef(class_def_idx)); 2728 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2729 Thread* self = Thread::Current(); 2730 ScopedObjectAccess soa(self); 2731 bool is_system_class = class_linker->FindSystemClass(self, descriptor) != nullptr; 2732 if (!is_system_class) { 2733 self->ClearException(); 2734 } 2735 return is_system_class; 2736} 2737 2738size_t CompilerDriver::GetNonRelativeLinkerPatchCount() const { 2739 return non_relative_linker_patch_count_.LoadRelaxed(); 2740} 2741 2742void CompilerDriver::SetRequiresConstructorBarrier(Thread* self, 2743 const DexFile* dex_file, 2744 uint16_t class_def_index, 2745 bool requires) { 2746 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2747 requires_constructor_barrier_.emplace(ClassReference(dex_file, class_def_index), requires); 2748} 2749 2750bool CompilerDriver::RequiresConstructorBarrier(Thread* self, 2751 const DexFile* dex_file, 2752 uint16_t class_def_index) { 2753 ClassReference class_ref(dex_file, class_def_index); 2754 { 2755 ReaderMutexLock mu(self, requires_constructor_barrier_lock_); 2756 auto it = requires_constructor_barrier_.find(class_ref); 2757 if (it != requires_constructor_barrier_.end()) { 2758 return it->second; 2759 } 2760 } 2761 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2762 const bool requires = RequiresConstructorBarrier(*dex_file, class_def_index); 2763 requires_constructor_barrier_.emplace(class_ref, requires); 2764 return requires; 2765} 2766 2767std::string CompilerDriver::GetMemoryUsageString(bool extended) const { 2768 std::ostringstream oss; 2769 const gc::Heap* const heap = Runtime::Current()->GetHeap(); 2770 const size_t java_alloc = heap->GetBytesAllocated(); 2771 oss << "arena alloc=" << PrettySize(max_arena_alloc_) << " (" << max_arena_alloc_ << "B)"; 2772 oss << " java alloc=" << PrettySize(java_alloc) << " (" << java_alloc << "B)"; 2773#if defined(__BIONIC__) || defined(__GLIBC__) 2774 const struct mallinfo info = mallinfo(); 2775 const size_t allocated_space = static_cast<size_t>(info.uordblks); 2776 const size_t free_space = static_cast<size_t>(info.fordblks); 2777 oss << " native alloc=" << PrettySize(allocated_space) << " (" << allocated_space << "B)" 2778 << " free=" << PrettySize(free_space) << " (" << free_space << "B)"; 2779#endif 2780 compiled_method_storage_.DumpMemoryUsage(oss, extended); 2781 return oss.str(); 2782} 2783 2784bool CompilerDriver::MayInlineInternal(const DexFile* inlined_from, 2785 const DexFile* inlined_into) const { 2786 // We're not allowed to inline across dex files if we're the no-inline-from dex file. 2787 if (inlined_from != inlined_into && 2788 compiler_options_->GetNoInlineFromDexFile() != nullptr && 2789 ContainsElement(*compiler_options_->GetNoInlineFromDexFile(), inlined_from)) { 2790 return false; 2791 } 2792 2793 return true; 2794} 2795 2796void CompilerDriver::InitializeThreadPools() { 2797 size_t parallel_count = parallel_thread_count_ > 0 ? parallel_thread_count_ - 1 : 0; 2798 parallel_thread_pool_.reset( 2799 new ThreadPool("Compiler driver thread pool", parallel_count)); 2800 single_thread_pool_.reset(new ThreadPool("Single-threaded Compiler driver thread pool", 0)); 2801} 2802 2803void CompilerDriver::FreeThreadPools() { 2804 parallel_thread_pool_.reset(); 2805 single_thread_pool_.reset(); 2806} 2807 2808} // namespace art 2809