compiler_driver.cc revision bfb80d25eaeb7a604d5dd25a370e3869e96a33ab
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 (GetCompilerOptions().IsBootImage()) { 315 CHECK(image_classes_.get() != nullptr) << "Expected image classes for boot image"; 316 } 317} 318 319CompilerDriver::~CompilerDriver() { 320 Thread* self = Thread::Current(); 321 { 322 MutexLock mu(self, compiled_classes_lock_); 323 STLDeleteValues(&compiled_classes_); 324 } 325 compiled_methods_.Visit([this](const MethodReference& ref ATTRIBUTE_UNUSED, 326 CompiledMethod* method) { 327 if (method != nullptr) { 328 CompiledMethod::ReleaseSwapAllocatedCompiledMethod(this, method); 329 } 330 }); 331 compiler_->UnInit(); 332} 333 334 335#define CREATE_TRAMPOLINE(type, abi, offset) \ 336 if (Is64BitInstructionSet(instruction_set_)) { \ 337 return CreateTrampoline64(instruction_set_, abi, \ 338 type ## _ENTRYPOINT_OFFSET(PointerSize::k64, offset)); \ 339 } else { \ 340 return CreateTrampoline32(instruction_set_, abi, \ 341 type ## _ENTRYPOINT_OFFSET(PointerSize::k32, offset)); \ 342 } 343 344std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateJniDlsymLookup() const { 345 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 346} 347 348std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickGenericJniTrampoline() 349 const { 350 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 351} 352 353std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickImtConflictTrampoline() 354 const { 355 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 356} 357 358std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickResolutionTrampoline() 359 const { 360 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 361} 362 363std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickToInterpreterBridge() 364 const { 365 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 366} 367#undef CREATE_TRAMPOLINE 368 369static void SetupIntrinsic(Thread* self, 370 Intrinsics intrinsic, 371 InvokeType invoke_type, 372 const char* class_name, 373 const char* method_name, 374 const char* signature) 375 REQUIRES_SHARED(Locks::mutator_lock_) { 376 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 377 PointerSize image_size = class_linker->GetImagePointerSize(); 378 mirror::Class* cls = class_linker->FindSystemClass(self, class_name); 379 if (cls == nullptr) { 380 LOG(FATAL) << "Could not find class of intrinsic " << class_name; 381 } 382 ArtMethod* method = (invoke_type == kStatic || invoke_type == kDirect) 383 ? cls->FindDeclaredDirectMethod(method_name, signature, image_size) 384 : cls->FindDeclaredVirtualMethod(method_name, signature, image_size); 385 if (method == nullptr) { 386 LOG(FATAL) << "Could not find method of intrinsic " 387 << class_name << " " << method_name << " " << signature; 388 } 389 DCHECK_EQ(method->GetInvokeType(), invoke_type); 390 method->SetIntrinsic(static_cast<uint32_t>(intrinsic)); 391} 392 393void CompilerDriver::CompileAll(jobject class_loader, 394 const std::vector<const DexFile*>& dex_files, 395 TimingLogger* timings) { 396 DCHECK(!Runtime::Current()->IsStarted()); 397 398 InitializeThreadPools(); 399 400 VLOG(compiler) << "Before precompile " << GetMemoryUsageString(false); 401 // Precompile: 402 // 1) Load image classes 403 // 2) Resolve all classes 404 // 3) Attempt to verify all classes 405 // 4) Attempt to initialize image classes, and trivially initialized classes 406 PreCompile(class_loader, dex_files, timings); 407 if (GetCompilerOptions().IsBootImage()) { 408 // We don't need to setup the intrinsics for non boot image compilation, as 409 // those compilations will pick up a boot image that have the ArtMethod already 410 // set with the intrinsics flag. 411 ScopedObjectAccess soa(Thread::Current()); 412#define SETUP_INTRINSICS(Name, InvokeType, NeedsEnvironmentOrCache, SideEffects, Exceptions, \ 413 ClassName, MethodName, Signature) \ 414 SetupIntrinsic(soa.Self(), Intrinsics::k##Name, InvokeType, ClassName, MethodName, Signature); 415#include "intrinsics_list.h" 416INTRINSICS_LIST(SETUP_INTRINSICS) 417#undef INTRINSICS_LIST 418#undef SETUP_INTRINSICS 419 } 420 // Compile: 421 // 1) Compile all classes and methods enabled for compilation. May fall back to dex-to-dex 422 // compilation. 423 if (GetCompilerOptions().IsAnyMethodCompilationEnabled()) { 424 Compile(class_loader, dex_files, timings); 425 } 426 if (dump_stats_) { 427 stats_->Dump(); 428 } 429 430 FreeThreadPools(); 431} 432 433// In-place unquicken the given `dex_files` based on `quickening_info`. 434static void Unquicken(const std::vector<const DexFile*>& dex_files, 435 const ArrayRef<const uint8_t>& quickening_info, 436 bool decompile_return_instruction) { 437 const uint8_t* quickening_info_ptr = quickening_info.data(); 438 const uint8_t* const quickening_info_end = quickening_info.data() + quickening_info.size(); 439 for (const DexFile* dex_file : dex_files) { 440 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 441 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 442 const uint8_t* class_data = dex_file->GetClassData(class_def); 443 if (class_data == nullptr) { 444 continue; 445 } 446 ClassDataItemIterator it(*dex_file, class_data); 447 // Skip fields 448 while (it.HasNextStaticField()) { 449 it.Next(); 450 } 451 while (it.HasNextInstanceField()) { 452 it.Next(); 453 } 454 455 while (it.HasNextDirectMethod()) { 456 const DexFile::CodeItem* code_item = it.GetMethodCodeItem(); 457 if (code_item != nullptr) { 458 uint32_t quickening_size = *reinterpret_cast<const uint32_t*>(quickening_info_ptr); 459 quickening_info_ptr += sizeof(uint32_t); 460 optimizer::ArtDecompileDEX(*code_item, 461 ArrayRef<const uint8_t>(quickening_info_ptr, quickening_size), 462 decompile_return_instruction); 463 quickening_info_ptr += quickening_size; 464 } 465 it.Next(); 466 } 467 468 while (it.HasNextVirtualMethod()) { 469 const DexFile::CodeItem* code_item = it.GetMethodCodeItem(); 470 if (code_item != nullptr) { 471 uint32_t quickening_size = *reinterpret_cast<const uint32_t*>(quickening_info_ptr); 472 quickening_info_ptr += sizeof(uint32_t); 473 optimizer::ArtDecompileDEX(*code_item, 474 ArrayRef<const uint8_t>(quickening_info_ptr, quickening_size), 475 decompile_return_instruction); 476 quickening_info_ptr += quickening_size; 477 } 478 it.Next(); 479 } 480 DCHECK(!it.HasNext()); 481 } 482 } 483 DCHECK_EQ(quickening_info_ptr, quickening_info_end) << "Failed to use all quickening info"; 484} 485 486void CompilerDriver::CompileAll(jobject class_loader, 487 const std::vector<const DexFile*>& dex_files, 488 VdexFile* vdex_file, 489 TimingLogger* timings) { 490 if (vdex_file != nullptr) { 491 // TODO: we unquicken unconditionnally, as we don't know 492 // if the boot image has changed. How exactly we'll know is under 493 // experimentation. 494 if (vdex_file->GetQuickeningInfo().size() != 0) { 495 TimingLogger::ScopedTiming t("Unquicken", timings); 496 // We do not decompile a RETURN_VOID_NO_BARRIER into a RETURN_VOID, as the quickening 497 // optimization does not depend on the boot image (the optimization relies on not 498 // having final fields in a class, which does not change for an app). 499 Unquicken(dex_files, 500 vdex_file->GetQuickeningInfo(), 501 /* decompile_return_instruction */ false); 502 } 503 Runtime::Current()->GetCompilerCallbacks()->SetVerifierDeps( 504 new verifier::VerifierDeps(dex_files, vdex_file->GetVerifierDepsData())); 505 } 506 CompileAll(class_loader, dex_files, timings); 507} 508 509static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 510 Thread* self, const CompilerDriver& driver, Handle<mirror::ClassLoader> class_loader, 511 const DexFile& dex_file, const DexFile::ClassDef& class_def) 512 REQUIRES_SHARED(Locks::mutator_lock_) { 513 auto* const runtime = Runtime::Current(); 514 DCHECK(driver.GetCompilerOptions().IsAnyMethodCompilationEnabled()); 515 const char* descriptor = dex_file.GetClassDescriptor(class_def); 516 ClassLinker* class_linker = runtime->GetClassLinker(); 517 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 518 if (klass == nullptr) { 519 CHECK(self->IsExceptionPending()); 520 self->ClearException(); 521 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 522 } 523 // DexToDex at the kOptimize level may introduce quickened opcodes, which replace symbolic 524 // references with actual offsets. We cannot re-verify such instructions. 525 // 526 // We store the verification information in the class status in the oat file, which the linker 527 // can validate (checksums) and use to skip load-time verification. It is thus safe to 528 // optimize when a class has been fully verified before. 529 optimizer::DexToDexCompilationLevel max_level = optimizer::DexToDexCompilationLevel::kOptimize; 530 if (driver.GetCompilerOptions().GetDebuggable()) { 531 // We are debuggable so definitions of classes might be changed. We don't want to do any 532 // optimizations that could break that. 533 max_level = optimizer::DexToDexCompilationLevel::kRequired; 534 } 535 if (klass->IsVerified()) { 536 // Class is verified so we can enable DEX-to-DEX compilation for performance. 537 return max_level; 538 } else if (klass->IsCompileTimeVerified()) { 539 // Class verification has soft-failed. Anyway, ensure at least correctness. 540 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 541 return optimizer::DexToDexCompilationLevel::kRequired; 542 } else { 543 // Class verification has failed: do not run DEX-to-DEX compilation. 544 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 545 } 546} 547 548static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 549 Thread* self, 550 const CompilerDriver& driver, 551 jobject jclass_loader, 552 const DexFile& dex_file, 553 const DexFile::ClassDef& class_def) { 554 ScopedObjectAccess soa(self); 555 StackHandleScope<1> hs(soa.Self()); 556 Handle<mirror::ClassLoader> class_loader( 557 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 558 return GetDexToDexCompilationLevel(self, driver, class_loader, dex_file, class_def); 559} 560 561// Does the runtime for the InstructionSet provide an implementation returned by 562// GetQuickGenericJniStub allowing down calls that aren't compiled using a JNI compiler? 563static bool InstructionSetHasGenericJniStub(InstructionSet isa) { 564 switch (isa) { 565 case kArm: 566 case kArm64: 567 case kThumb2: 568 case kMips: 569 case kMips64: 570 case kX86: 571 case kX86_64: return true; 572 default: return false; 573 } 574} 575 576static void CompileMethod(Thread* self, 577 CompilerDriver* driver, 578 const DexFile::CodeItem* code_item, 579 uint32_t access_flags, 580 InvokeType invoke_type, 581 uint16_t class_def_idx, 582 uint32_t method_idx, 583 Handle<mirror::ClassLoader> class_loader, 584 const DexFile& dex_file, 585 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level, 586 bool compilation_enabled, 587 Handle<mirror::DexCache> dex_cache) { 588 DCHECK(driver != nullptr); 589 CompiledMethod* compiled_method = nullptr; 590 uint64_t start_ns = kTimeCompileMethod ? NanoTime() : 0; 591 MethodReference method_ref(&dex_file, method_idx); 592 593 if (driver->GetCurrentDexToDexMethods() != nullptr) { 594 // This is the second pass when we dex-to-dex compile previously marked methods. 595 // TODO: Refactor the compilation to avoid having to distinguish the two passes 596 // here. That should be done on a higher level. http://b/29089975 597 if (driver->GetCurrentDexToDexMethods()->IsBitSet(method_idx)) { 598 const VerifiedMethod* verified_method = 599 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 600 // Do not optimize if a VerifiedMethod is missing. SafeCast elision, 601 // for example, relies on it. 602 compiled_method = optimizer::ArtCompileDEX( 603 driver, 604 code_item, 605 access_flags, 606 invoke_type, 607 class_def_idx, 608 method_idx, 609 class_loader, 610 dex_file, 611 (verified_method != nullptr) 612 ? dex_to_dex_compilation_level 613 : optimizer::DexToDexCompilationLevel::kRequired); 614 } 615 } else if ((access_flags & kAccNative) != 0) { 616 // Are we extracting only and have support for generic JNI down calls? 617 if (!driver->GetCompilerOptions().IsJniCompilationEnabled() && 618 InstructionSetHasGenericJniStub(driver->GetInstructionSet())) { 619 // Leaving this empty will trigger the generic JNI version 620 } else { 621 // Look-up the ArtMethod associated with this code_item (if any) 622 // -- It is later used to lookup any [optimization] annotations for this method. 623 ScopedObjectAccess soa(self); 624 625 // TODO: Lookup annotation from DexFile directly without resolving method. 626 ArtMethod* method = 627 Runtime::Current()->GetClassLinker()->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 628 dex_file, 629 method_idx, 630 dex_cache, 631 class_loader, 632 /* referrer */ nullptr, 633 invoke_type); 634 635 // Query any JNI optimization annotations such as @FastNative or @CriticalNative. 636 Compiler::JniOptimizationFlags optimization_flags = Compiler::kNone; 637 if (UNLIKELY(method == nullptr)) { 638 // Failed method resolutions happen very rarely, e.g. ancestor class cannot be resolved. 639 DCHECK(self->IsExceptionPending()); 640 self->ClearException(); 641 } else if (method->IsAnnotatedWithFastNative()) { 642 // TODO: Will no longer need this CHECK once we have verifier checking this. 643 CHECK(!method->IsAnnotatedWithCriticalNative()); 644 optimization_flags = Compiler::kFastNative; 645 } else if (method->IsAnnotatedWithCriticalNative()) { 646 // TODO: Will no longer need this CHECK once we have verifier checking this. 647 CHECK(!method->IsAnnotatedWithFastNative()); 648 optimization_flags = Compiler::kCriticalNative; 649 } 650 651 compiled_method = driver->GetCompiler()->JniCompile(access_flags, 652 method_idx, 653 dex_file, 654 optimization_flags); 655 CHECK(compiled_method != nullptr); 656 } 657 } else if ((access_flags & kAccAbstract) != 0) { 658 // Abstract methods don't have code. 659 } else { 660 const VerifiedMethod* verified_method = 661 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 662 bool compile = compilation_enabled && 663 // Basic checks, e.g., not <clinit>. 664 driver->GetVerificationResults() 665 ->IsCandidateForCompilation(method_ref, access_flags) && 666 // Did not fail to create VerifiedMethod metadata. 667 verified_method != nullptr && 668 // Do not have failures that should punt to the interpreter. 669 !verified_method->HasRuntimeThrow() && 670 (verified_method->GetEncounteredVerificationFailures() & 671 (verifier::VERIFY_ERROR_FORCE_INTERPRETER | verifier::VERIFY_ERROR_LOCKING)) == 0 && 672 // Is eligable for compilation by methods-to-compile filter. 673 driver->IsMethodToCompile(method_ref) && 674 driver->ShouldCompileBasedOnProfile(method_ref); 675 676 if (compile) { 677 // NOTE: if compiler declines to compile this method, it will return null. 678 compiled_method = driver->GetCompiler()->Compile(code_item, 679 access_flags, 680 invoke_type, 681 class_def_idx, 682 method_idx, 683 class_loader, 684 dex_file, 685 dex_cache); 686 } 687 if (compiled_method == nullptr && 688 dex_to_dex_compilation_level != optimizer::DexToDexCompilationLevel::kDontDexToDexCompile) { 689 DCHECK(!Runtime::Current()->UseJitCompilation()); 690 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 691 driver->MarkForDexToDexCompilation(self, method_ref); 692 } 693 } 694 if (kTimeCompileMethod) { 695 uint64_t duration_ns = NanoTime() - start_ns; 696 if (duration_ns > MsToNs(driver->GetCompiler()->GetMaximumCompilationTimeBeforeWarning())) { 697 LOG(WARNING) << "Compilation of " << dex_file.PrettyMethod(method_idx) 698 << " took " << PrettyDuration(duration_ns); 699 } 700 } 701 702 if (compiled_method != nullptr) { 703 // Count non-relative linker patches. 704 size_t non_relative_linker_patch_count = 0u; 705 for (const LinkerPatch& patch : compiled_method->GetPatches()) { 706 if (!patch.IsPcRelative()) { 707 ++non_relative_linker_patch_count; 708 } 709 } 710 bool compile_pic = driver->GetCompilerOptions().GetCompilePic(); // Off by default 711 // When compiling with PIC, there should be zero non-relative linker patches 712 CHECK(!compile_pic || non_relative_linker_patch_count == 0u); 713 714 driver->AddCompiledMethod(method_ref, compiled_method, non_relative_linker_patch_count); 715 } 716 717 if (self->IsExceptionPending()) { 718 ScopedObjectAccess soa(self); 719 LOG(FATAL) << "Unexpected exception compiling: " << dex_file.PrettyMethod(method_idx) << "\n" 720 << self->GetException()->Dump(); 721 } 722} 723 724void CompilerDriver::CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) { 725 DCHECK(!Runtime::Current()->IsStarted()); 726 jobject jclass_loader; 727 const DexFile* dex_file; 728 uint16_t class_def_idx; 729 uint32_t method_idx = method->GetDexMethodIndex(); 730 uint32_t access_flags = method->GetAccessFlags(); 731 InvokeType invoke_type = method->GetInvokeType(); 732 StackHandleScope<2> hs(self); 733 Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache())); 734 Handle<mirror::ClassLoader> class_loader( 735 hs.NewHandle(method->GetDeclaringClass()->GetClassLoader())); 736 { 737 ScopedObjectAccessUnchecked soa(self); 738 ScopedLocalRef<jobject> local_class_loader( 739 soa.Env(), soa.AddLocalReference<jobject>(class_loader.Get())); 740 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 741 // Find the dex_file 742 dex_file = method->GetDexFile(); 743 class_def_idx = method->GetClassDefIndex(); 744 } 745 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 746 747 // Go to native so that we don't block GC during compilation. 748 ScopedThreadSuspension sts(self, kNative); 749 750 std::vector<const DexFile*> dex_files; 751 dex_files.push_back(dex_file); 752 753 InitializeThreadPools(); 754 755 PreCompile(jclass_loader, dex_files, timings); 756 757 // Can we run DEX-to-DEX compiler on this class ? 758 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 759 GetDexToDexCompilationLevel(self, 760 *this, 761 jclass_loader, 762 *dex_file, 763 dex_file->GetClassDef(class_def_idx)); 764 765 DCHECK(current_dex_to_dex_methods_ == nullptr); 766 CompileMethod(self, 767 this, 768 code_item, 769 access_flags, 770 invoke_type, 771 class_def_idx, 772 method_idx, 773 class_loader, 774 *dex_file, 775 dex_to_dex_compilation_level, 776 true, 777 dex_cache); 778 779 ArrayRef<DexFileMethodSet> dex_to_dex_references; 780 { 781 // From this point on, we shall not modify dex_to_dex_references_, so 782 // just grab a reference to it that we use without holding the mutex. 783 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 784 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 785 } 786 if (!dex_to_dex_references.empty()) { 787 DCHECK_EQ(dex_to_dex_references.size(), 1u); 788 DCHECK(&dex_to_dex_references[0].GetDexFile() == dex_file); 789 current_dex_to_dex_methods_ = &dex_to_dex_references.front().GetMethodIndexes(); 790 DCHECK(current_dex_to_dex_methods_->IsBitSet(method_idx)); 791 DCHECK_EQ(current_dex_to_dex_methods_->NumSetBits(), 1u); 792 CompileMethod(self, 793 this, 794 code_item, 795 access_flags, 796 invoke_type, 797 class_def_idx, 798 method_idx, 799 class_loader, 800 *dex_file, 801 dex_to_dex_compilation_level, 802 true, 803 dex_cache); 804 current_dex_to_dex_methods_ = nullptr; 805 } 806 807 FreeThreadPools(); 808 809 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 810} 811 812void CompilerDriver::Resolve(jobject class_loader, 813 const std::vector<const DexFile*>& dex_files, 814 TimingLogger* timings) { 815 // Resolution allocates classes and needs to run single-threaded to be deterministic. 816 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 817 ThreadPool* resolve_thread_pool = force_determinism 818 ? single_thread_pool_.get() 819 : parallel_thread_pool_.get(); 820 size_t resolve_thread_count = force_determinism ? 1U : parallel_thread_count_; 821 822 for (size_t i = 0; i != dex_files.size(); ++i) { 823 const DexFile* dex_file = dex_files[i]; 824 CHECK(dex_file != nullptr); 825 ResolveDexFile(class_loader, 826 *dex_file, 827 dex_files, 828 resolve_thread_pool, 829 resolve_thread_count, 830 timings); 831 } 832} 833 834// Resolve const-strings in the code. Done to have deterministic allocation behavior. Right now 835// this is single-threaded for simplicity. 836// TODO: Collect the relevant string indices in parallel, then allocate them sequentially in a 837// stable order. 838 839static void ResolveConstStrings(Handle<mirror::DexCache> dex_cache, 840 const DexFile& dex_file, 841 const DexFile::CodeItem* code_item) 842 REQUIRES_SHARED(Locks::mutator_lock_) { 843 if (code_item == nullptr) { 844 // Abstract or native method. 845 return; 846 } 847 848 const uint16_t* code_ptr = code_item->insns_; 849 const uint16_t* code_end = code_item->insns_ + code_item->insns_size_in_code_units_; 850 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 851 852 while (code_ptr < code_end) { 853 const Instruction* inst = Instruction::At(code_ptr); 854 switch (inst->Opcode()) { 855 case Instruction::CONST_STRING: 856 case Instruction::CONST_STRING_JUMBO: { 857 dex::StringIndex string_index((inst->Opcode() == Instruction::CONST_STRING) 858 ? inst->VRegB_21c() 859 : inst->VRegB_31c()); 860 mirror::String* string = class_linker->ResolveString(dex_file, string_index, dex_cache); 861 CHECK(string != nullptr) << "Could not allocate a string when forcing determinism"; 862 break; 863 } 864 865 default: 866 break; 867 } 868 869 code_ptr += inst->SizeInCodeUnits(); 870 } 871} 872 873static void ResolveConstStrings(CompilerDriver* driver, 874 const std::vector<const DexFile*>& dex_files, 875 TimingLogger* timings) { 876 ScopedObjectAccess soa(Thread::Current()); 877 StackHandleScope<1> hs(soa.Self()); 878 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 879 MutableHandle<mirror::DexCache> dex_cache(hs.NewHandle<mirror::DexCache>(nullptr)); 880 881 for (const DexFile* dex_file : dex_files) { 882 dex_cache.Assign(class_linker->FindDexCache(soa.Self(), *dex_file)); 883 TimingLogger::ScopedTiming t("Resolve const-string Strings", timings); 884 885 size_t class_def_count = dex_file->NumClassDefs(); 886 for (size_t class_def_index = 0; class_def_index < class_def_count; ++class_def_index) { 887 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index); 888 889 const uint8_t* class_data = dex_file->GetClassData(class_def); 890 if (class_data == nullptr) { 891 // empty class, probably a marker interface 892 continue; 893 } 894 895 ClassDataItemIterator it(*dex_file, class_data); 896 // Skip fields 897 while (it.HasNextStaticField()) { 898 it.Next(); 899 } 900 while (it.HasNextInstanceField()) { 901 it.Next(); 902 } 903 904 bool compilation_enabled = driver->IsClassToCompile( 905 dex_file->StringByTypeIdx(class_def.class_idx_)); 906 if (!compilation_enabled) { 907 // Compilation is skipped, do not resolve const-string in code of this class. 908 // TODO: Make sure that inlining honors this. 909 continue; 910 } 911 912 // Direct methods. 913 int64_t previous_direct_method_idx = -1; 914 while (it.HasNextDirectMethod()) { 915 uint32_t method_idx = it.GetMemberIndex(); 916 if (method_idx == previous_direct_method_idx) { 917 // smali can create dex files with two encoded_methods sharing the same method_idx 918 // http://code.google.com/p/smali/issues/detail?id=119 919 it.Next(); 920 continue; 921 } 922 previous_direct_method_idx = method_idx; 923 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 924 it.Next(); 925 } 926 // Virtual methods. 927 int64_t previous_virtual_method_idx = -1; 928 while (it.HasNextVirtualMethod()) { 929 uint32_t method_idx = it.GetMemberIndex(); 930 if (method_idx == previous_virtual_method_idx) { 931 // smali can create dex files with two encoded_methods sharing the same method_idx 932 // http://code.google.com/p/smali/issues/detail?id=119 933 it.Next(); 934 continue; 935 } 936 previous_virtual_method_idx = method_idx; 937 ResolveConstStrings(dex_cache, *dex_file, it.GetMethodCodeItem()); 938 it.Next(); 939 } 940 DCHECK(!it.HasNext()); 941 } 942 } 943} 944 945inline void CompilerDriver::CheckThreadPools() { 946 DCHECK(parallel_thread_pool_ != nullptr); 947 DCHECK(single_thread_pool_ != nullptr); 948} 949 950static void EnsureVerifiedOrVerifyAtRuntime(jobject jclass_loader, 951 const std::vector<const DexFile*>& dex_files) { 952 ScopedObjectAccess soa(Thread::Current()); 953 StackHandleScope<2> hs(soa.Self()); 954 Handle<mirror::ClassLoader> class_loader( 955 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 956 MutableHandle<mirror::Class> cls(hs.NewHandle<mirror::Class>(nullptr)); 957 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 958 959 for (const DexFile* dex_file : dex_files) { 960 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 961 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 962 const char* descriptor = dex_file->GetClassDescriptor(class_def); 963 cls.Assign(class_linker->FindClass(soa.Self(), descriptor, class_loader)); 964 if (cls == nullptr) { 965 soa.Self()->ClearException(); 966 } else if (&cls->GetDexFile() == dex_file) { 967 DCHECK(cls->IsErroneous() || cls->IsVerified() || cls->IsCompileTimeVerified()) 968 << cls->PrettyClass() 969 << " " << cls->GetStatus(); 970 } 971 } 972 } 973} 974 975void CompilerDriver::PreCompile(jobject class_loader, 976 const std::vector<const DexFile*>& dex_files, 977 TimingLogger* timings) { 978 CheckThreadPools(); 979 980 for (const DexFile* dex_file : dex_files) { 981 // Can be already inserted if the caller is CompileOne. This happens for gtests. 982 if (!compiled_methods_.HaveDexFile(dex_file)) { 983 compiled_methods_.AddDexFile(dex_file); 984 } 985 } 986 987 LoadImageClasses(timings); 988 VLOG(compiler) << "LoadImageClasses: " << GetMemoryUsageString(false); 989 990 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 991 Resolve(class_loader, dex_files, timings); 992 VLOG(compiler) << "Resolve: " << GetMemoryUsageString(false); 993 } 994 995 if (compiler_options_->AssumeClassesAreVerified()) { 996 VLOG(compiler) << "Verify none mode specified, skipping verification."; 997 SetVerified(class_loader, dex_files, timings); 998 } 999 1000 if (!compiler_options_->IsVerificationEnabled()) { 1001 return; 1002 } 1003 1004 if (GetCompilerOptions().IsForceDeterminism() && GetCompilerOptions().IsBootImage()) { 1005 // Resolve strings from const-string. Do this now to have a deterministic image. 1006 ResolveConstStrings(this, dex_files, timings); 1007 VLOG(compiler) << "Resolve const-strings: " << GetMemoryUsageString(false); 1008 } 1009 1010 Verify(class_loader, dex_files, timings); 1011 VLOG(compiler) << "Verify: " << GetMemoryUsageString(false); 1012 1013 if (had_hard_verifier_failure_ && GetCompilerOptions().AbortOnHardVerifierFailure()) { 1014 LOG(FATAL) << "Had a hard failure verifying all classes, and was asked to abort in such " 1015 << "situations. Please check the log."; 1016 } 1017 1018 if (compiler_options_->IsAnyMethodCompilationEnabled()) { 1019 if (kIsDebugBuild) { 1020 EnsureVerifiedOrVerifyAtRuntime(class_loader, dex_files); 1021 } 1022 InitializeClasses(class_loader, dex_files, timings); 1023 VLOG(compiler) << "InitializeClasses: " << GetMemoryUsageString(false); 1024 } 1025 1026 UpdateImageClasses(timings); 1027 VLOG(compiler) << "UpdateImageClasses: " << GetMemoryUsageString(false); 1028} 1029 1030bool CompilerDriver::IsImageClass(const char* descriptor) const { 1031 if (image_classes_ != nullptr) { 1032 // If we have a set of image classes, use those. 1033 return image_classes_->find(descriptor) != image_classes_->end(); 1034 } 1035 // No set of image classes, assume we include all the classes. 1036 // NOTE: Currently only reachable from InitImageMethodVisitor for the app image case. 1037 return !GetCompilerOptions().IsBootImage(); 1038} 1039 1040bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 1041 if (classes_to_compile_ == nullptr) { 1042 return true; 1043 } 1044 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 1045} 1046 1047bool CompilerDriver::IsMethodToCompile(const MethodReference& method_ref) const { 1048 if (methods_to_compile_ == nullptr) { 1049 return true; 1050 } 1051 1052 std::string tmp = method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1053 return methods_to_compile_->find(tmp.c_str()) != methods_to_compile_->end(); 1054} 1055 1056bool CompilerDriver::ShouldCompileBasedOnProfile(const MethodReference& method_ref) const { 1057 if (!CompilerFilter::DependsOnProfile(compiler_options_->GetCompilerFilter())) { 1058 // Use the compiler filter instead of the presence of profile_compilation_info_ since 1059 // we may want to have full speed compilation along with profile based layout optimizations. 1060 return true; 1061 } 1062 bool result = profile_compilation_info_->ContainsMethod(method_ref); 1063 1064 if (kDebugProfileGuidedCompilation) { 1065 LOG(INFO) << "[ProfileGuidedCompilation] " 1066 << (result ? "Compiled" : "Skipped") << " method:" 1067 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index, true); 1068 } 1069 return result; 1070} 1071 1072class ResolveCatchBlockExceptionsClassVisitor : public ClassVisitor { 1073 public: 1074 ResolveCatchBlockExceptionsClassVisitor() : classes_() {} 1075 1076 virtual bool operator()(ObjPtr<mirror::Class> c) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1077 classes_.push_back(c); 1078 return true; 1079 } 1080 1081 void FindExceptionTypesToResolve( 1082 std::set<std::pair<dex::TypeIndex, const DexFile*>>* exceptions_to_resolve) 1083 REQUIRES_SHARED(Locks::mutator_lock_) { 1084 const auto pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1085 for (ObjPtr<mirror::Class> klass : classes_) { 1086 for (ArtMethod& method : klass->GetMethods(pointer_size)) { 1087 FindExceptionTypesToResolveForMethod(&method, exceptions_to_resolve); 1088 } 1089 } 1090 } 1091 1092 private: 1093 void FindExceptionTypesToResolveForMethod( 1094 ArtMethod* method, 1095 std::set<std::pair<dex::TypeIndex, const DexFile*>>* exceptions_to_resolve) 1096 REQUIRES_SHARED(Locks::mutator_lock_) { 1097 const DexFile::CodeItem* code_item = method->GetCodeItem(); 1098 if (code_item == nullptr) { 1099 return; // native or abstract method 1100 } 1101 if (code_item->tries_size_ == 0) { 1102 return; // nothing to process 1103 } 1104 const uint8_t* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 1105 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 1106 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 1107 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 1108 bool has_catch_all = false; 1109 if (encoded_catch_handler_size <= 0) { 1110 encoded_catch_handler_size = -encoded_catch_handler_size; 1111 has_catch_all = true; 1112 } 1113 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 1114 dex::TypeIndex encoded_catch_handler_handlers_type_idx = 1115 dex::TypeIndex(DecodeUnsignedLeb128(&encoded_catch_handler_list)); 1116 // Add to set of types to resolve if not already in the dex cache resolved types 1117 if (!method->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 1118 exceptions_to_resolve->emplace(encoded_catch_handler_handlers_type_idx, 1119 method->GetDexFile()); 1120 } 1121 // ignore address associated with catch handler 1122 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1123 } 1124 if (has_catch_all) { 1125 // ignore catch all address 1126 DecodeUnsignedLeb128(&encoded_catch_handler_list); 1127 } 1128 } 1129 } 1130 1131 std::vector<ObjPtr<mirror::Class>> classes_; 1132}; 1133 1134class RecordImageClassesVisitor : public ClassVisitor { 1135 public: 1136 explicit RecordImageClassesVisitor(std::unordered_set<std::string>* image_classes) 1137 : image_classes_(image_classes) {} 1138 1139 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1140 std::string temp; 1141 image_classes_->insert(klass->GetDescriptor(&temp)); 1142 return true; 1143 } 1144 1145 private: 1146 std::unordered_set<std::string>* const image_classes_; 1147}; 1148 1149// Make a list of descriptors for classes to include in the image 1150void CompilerDriver::LoadImageClasses(TimingLogger* timings) { 1151 CHECK(timings != nullptr); 1152 if (!GetCompilerOptions().IsBootImage()) { 1153 return; 1154 } 1155 1156 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 1157 // Make a first class to load all classes explicitly listed in the file 1158 Thread* self = Thread::Current(); 1159 ScopedObjectAccess soa(self); 1160 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1161 CHECK(image_classes_.get() != nullptr); 1162 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 1163 const std::string& descriptor(*it); 1164 StackHandleScope<1> hs(self); 1165 Handle<mirror::Class> klass( 1166 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 1167 if (klass == nullptr) { 1168 VLOG(compiler) << "Failed to find class " << descriptor; 1169 image_classes_->erase(it++); 1170 self->ClearException(); 1171 } else { 1172 ++it; 1173 } 1174 } 1175 1176 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 1177 // exceptions are resolved by the verifier when there is a catch block in an interested method. 1178 // Do this here so that exception classes appear to have been specified image classes. 1179 std::set<std::pair<dex::TypeIndex, const DexFile*>> unresolved_exception_types; 1180 StackHandleScope<1> hs(self); 1181 Handle<mirror::Class> java_lang_Throwable( 1182 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 1183 do { 1184 unresolved_exception_types.clear(); 1185 { 1186 // Thread suspension is not allowed while ResolveCatchBlockExceptionsClassVisitor 1187 // is using a std::vector<ObjPtr<mirror::Class>>. 1188 ScopedAssertNoThreadSuspension ants(__FUNCTION__); 1189 ResolveCatchBlockExceptionsClassVisitor visitor; 1190 class_linker->VisitClasses(&visitor); 1191 visitor.FindExceptionTypesToResolve(&unresolved_exception_types); 1192 } 1193 for (const auto& exception_type : unresolved_exception_types) { 1194 dex::TypeIndex exception_type_idx = exception_type.first; 1195 const DexFile* dex_file = exception_type.second; 1196 StackHandleScope<2> hs2(self); 1197 Handle<mirror::DexCache> dex_cache(hs2.NewHandle(class_linker->RegisterDexFile(*dex_file, 1198 nullptr))); 1199 Handle<mirror::Class> klass(hs2.NewHandle( 1200 (dex_cache != nullptr) 1201 ? class_linker->ResolveType(*dex_file, 1202 exception_type_idx, 1203 dex_cache, 1204 ScopedNullHandle<mirror::ClassLoader>()) 1205 : nullptr)); 1206 if (klass == nullptr) { 1207 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 1208 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 1209 LOG(FATAL) << "Failed to resolve class " << descriptor; 1210 } 1211 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 1212 } 1213 // Resolving exceptions may load classes that reference more exceptions, iterate until no 1214 // more are found 1215 } while (!unresolved_exception_types.empty()); 1216 1217 // We walk the roots looking for classes so that we'll pick up the 1218 // above classes plus any classes them depend on such super 1219 // classes, interfaces, and the required ClassLinker roots. 1220 RecordImageClassesVisitor visitor(image_classes_.get()); 1221 class_linker->VisitClasses(&visitor); 1222 1223 CHECK_NE(image_classes_->size(), 0U); 1224} 1225 1226static void MaybeAddToImageClasses(Thread* self, 1227 ObjPtr<mirror::Class> klass, 1228 std::unordered_set<std::string>* image_classes) 1229 REQUIRES_SHARED(Locks::mutator_lock_) { 1230 DCHECK_EQ(self, Thread::Current()); 1231 StackHandleScope<1> hs(self); 1232 std::string temp; 1233 const PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1234 while (!klass->IsObjectClass()) { 1235 const char* descriptor = klass->GetDescriptor(&temp); 1236 std::pair<std::unordered_set<std::string>::iterator, bool> result = 1237 image_classes->insert(descriptor); 1238 if (!result.second) { // Previously inserted. 1239 break; 1240 } 1241 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 1242 for (size_t i = 0, num_interfaces = klass->NumDirectInterfaces(); i != num_interfaces; ++i) { 1243 ObjPtr<mirror::Class> interface = mirror::Class::GetDirectInterface(self, klass, i); 1244 DCHECK(interface != nullptr); 1245 MaybeAddToImageClasses(self, interface, image_classes); 1246 } 1247 for (auto& m : klass->GetVirtualMethods(pointer_size)) { 1248 MaybeAddToImageClasses(self, m.GetDeclaringClass(), image_classes); 1249 } 1250 if (klass->IsArrayClass()) { 1251 MaybeAddToImageClasses(self, klass->GetComponentType(), image_classes); 1252 } 1253 klass.Assign(klass->GetSuperClass()); 1254 } 1255} 1256 1257// Keeps all the data for the update together. Also doubles as the reference visitor. 1258// Note: we can use object pointers because we suspend all threads. 1259class ClinitImageUpdate { 1260 public: 1261 static ClinitImageUpdate* Create(VariableSizedHandleScope& hs, 1262 std::unordered_set<std::string>* image_class_descriptors, 1263 Thread* self, 1264 ClassLinker* linker) { 1265 std::unique_ptr<ClinitImageUpdate> res(new ClinitImageUpdate(hs, 1266 image_class_descriptors, 1267 self, 1268 linker)); 1269 return res.release(); 1270 } 1271 1272 ~ClinitImageUpdate() { 1273 // Allow others to suspend again. 1274 self_->EndAssertNoThreadSuspension(old_cause_); 1275 } 1276 1277 // Visitor for VisitReferences. 1278 void operator()(ObjPtr<mirror::Object> object, 1279 MemberOffset field_offset, 1280 bool /* is_static */) const 1281 REQUIRES_SHARED(Locks::mutator_lock_) { 1282 mirror::Object* ref = object->GetFieldObject<mirror::Object>(field_offset); 1283 if (ref != nullptr) { 1284 VisitClinitClassesObject(ref); 1285 } 1286 } 1287 1288 // java.lang.ref.Reference visitor for VisitReferences. 1289 void operator()(ObjPtr<mirror::Class> klass ATTRIBUTE_UNUSED, 1290 ObjPtr<mirror::Reference> ref ATTRIBUTE_UNUSED) const {} 1291 1292 // Ignore class native roots. 1293 void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) 1294 const {} 1295 void VisitRoot(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) const {} 1296 1297 void Walk() REQUIRES_SHARED(Locks::mutator_lock_) { 1298 // Use the initial classes as roots for a search. 1299 for (Handle<mirror::Class> klass_root : image_classes_) { 1300 VisitClinitClassesObject(klass_root.Get()); 1301 } 1302 Thread* self = Thread::Current(); 1303 ScopedAssertNoThreadSuspension ants(__FUNCTION__); 1304 for (Handle<mirror::Class> h_klass : to_insert_) { 1305 MaybeAddToImageClasses(self, h_klass.Get(), image_class_descriptors_); 1306 } 1307 } 1308 1309 private: 1310 class FindImageClassesVisitor : public ClassVisitor { 1311 public: 1312 explicit FindImageClassesVisitor(VariableSizedHandleScope& hs, 1313 ClinitImageUpdate* data) 1314 : data_(data), 1315 hs_(hs) {} 1316 1317 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) { 1318 std::string temp; 1319 const char* name = klass->GetDescriptor(&temp); 1320 if (data_->image_class_descriptors_->find(name) != data_->image_class_descriptors_->end()) { 1321 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1322 } else { 1323 // Check whether it is initialized and has a clinit. They must be kept, too. 1324 if (klass->IsInitialized() && klass->FindClassInitializer( 1325 Runtime::Current()->GetClassLinker()->GetImagePointerSize()) != nullptr) { 1326 data_->image_classes_.push_back(hs_.NewHandle(klass)); 1327 } 1328 } 1329 return true; 1330 } 1331 1332 private: 1333 ClinitImageUpdate* const data_; 1334 VariableSizedHandleScope& hs_; 1335 }; 1336 1337 ClinitImageUpdate(VariableSizedHandleScope& hs, 1338 std::unordered_set<std::string>* image_class_descriptors, 1339 Thread* self, 1340 ClassLinker* linker) REQUIRES_SHARED(Locks::mutator_lock_) 1341 : hs_(hs), 1342 image_class_descriptors_(image_class_descriptors), 1343 self_(self) { 1344 CHECK(linker != nullptr); 1345 CHECK(image_class_descriptors != nullptr); 1346 1347 // Make sure nobody interferes with us. 1348 old_cause_ = self->StartAssertNoThreadSuspension("Boot image closure"); 1349 1350 // Find all the already-marked classes. 1351 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1352 FindImageClassesVisitor visitor(hs_, this); 1353 linker->VisitClasses(&visitor); 1354 } 1355 1356 void VisitClinitClassesObject(mirror::Object* object) const 1357 REQUIRES_SHARED(Locks::mutator_lock_) { 1358 DCHECK(object != nullptr); 1359 if (marked_objects_.find(object) != marked_objects_.end()) { 1360 // Already processed. 1361 return; 1362 } 1363 1364 // Mark it. 1365 marked_objects_.insert(object); 1366 1367 if (object->IsClass()) { 1368 // Add to the TODO list since MaybeAddToImageClasses may cause thread suspension. Thread 1369 // suspensionb is not safe to do in VisitObjects or VisitReferences. 1370 to_insert_.push_back(hs_.NewHandle(object->AsClass())); 1371 } else { 1372 // Else visit the object's class. 1373 VisitClinitClassesObject(object->GetClass()); 1374 } 1375 1376 // If it is not a DexCache, visit all references. 1377 if (!object->IsDexCache()) { 1378 object->VisitReferences(*this, *this); 1379 } 1380 } 1381 1382 VariableSizedHandleScope& hs_; 1383 mutable std::vector<Handle<mirror::Class>> to_insert_; 1384 mutable std::unordered_set<mirror::Object*> marked_objects_; 1385 std::unordered_set<std::string>* const image_class_descriptors_; 1386 std::vector<Handle<mirror::Class>> image_classes_; 1387 Thread* const self_; 1388 const char* old_cause_; 1389 1390 DISALLOW_COPY_AND_ASSIGN(ClinitImageUpdate); 1391}; 1392 1393void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 1394 if (GetCompilerOptions().IsBootImage()) { 1395 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 1396 1397 Runtime* runtime = Runtime::Current(); 1398 1399 // Suspend all threads. 1400 ScopedSuspendAll ssa(__FUNCTION__); 1401 1402 VariableSizedHandleScope hs(Thread::Current()); 1403 std::string error_msg; 1404 std::unique_ptr<ClinitImageUpdate> update(ClinitImageUpdate::Create(hs, 1405 image_classes_.get(), 1406 Thread::Current(), 1407 runtime->GetClassLinker())); 1408 1409 // Do the marking. 1410 update->Walk(); 1411 } 1412} 1413 1414bool CompilerDriver::CanAssumeClassIsLoaded(mirror::Class* klass) { 1415 Runtime* runtime = Runtime::Current(); 1416 if (!runtime->IsAotCompiler()) { 1417 DCHECK(runtime->UseJitCompilation()); 1418 // Having the klass reference here implies that the klass is already loaded. 1419 return true; 1420 } 1421 if (!GetCompilerOptions().IsBootImage()) { 1422 // Assume loaded only if klass is in the boot image. App classes cannot be assumed 1423 // loaded because we don't even know what class loader will be used to load them. 1424 bool class_in_image = runtime->GetHeap()->FindSpaceFromObject(klass, false)->IsImageSpace(); 1425 return class_in_image; 1426 } 1427 std::string temp; 1428 const char* descriptor = klass->GetDescriptor(&temp); 1429 return IsImageClass(descriptor); 1430} 1431 1432void CompilerDriver::MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref) { 1433 MutexLock lock(self, dex_to_dex_references_lock_); 1434 // Since we're compiling one dex file at a time, we need to look for the 1435 // current dex file entry only at the end of dex_to_dex_references_. 1436 if (dex_to_dex_references_.empty() || 1437 &dex_to_dex_references_.back().GetDexFile() != method_ref.dex_file) { 1438 dex_to_dex_references_.emplace_back(*method_ref.dex_file); 1439 } 1440 dex_to_dex_references_.back().GetMethodIndexes().SetBit(method_ref.dex_method_index); 1441} 1442 1443bool CompilerDriver::CanAccessTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class, 1444 ObjPtr<mirror::Class> resolved_class) { 1445 if (resolved_class == nullptr) { 1446 stats_->TypeNeedsAccessCheck(); 1447 return false; // Unknown class needs access checks. 1448 } 1449 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1450 if (!is_accessible) { 1451 if (referrer_class == nullptr) { 1452 stats_->TypeNeedsAccessCheck(); 1453 return false; // Incomplete referrer knowledge needs access check. 1454 } 1455 // Perform access check, will return true if access is ok or false if we're going to have to 1456 // check this at runtime (for example for class loaders). 1457 is_accessible = referrer_class->CanAccess(resolved_class); 1458 } 1459 if (is_accessible) { 1460 stats_->TypeDoesntNeedAccessCheck(); 1461 } else { 1462 stats_->TypeNeedsAccessCheck(); 1463 } 1464 return is_accessible; 1465} 1466 1467bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class, 1468 ObjPtr<mirror::Class> resolved_class, 1469 bool* finalizable) { 1470 if (resolved_class == nullptr) { 1471 stats_->TypeNeedsAccessCheck(); 1472 // Be conservative. 1473 *finalizable = true; 1474 return false; // Unknown class needs access checks. 1475 } 1476 *finalizable = resolved_class->IsFinalizable(); 1477 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1478 if (!is_accessible) { 1479 if (referrer_class == nullptr) { 1480 stats_->TypeNeedsAccessCheck(); 1481 return false; // Incomplete referrer knowledge needs access check. 1482 } 1483 // Perform access and instantiable checks, will return true if access is ok or false if we're 1484 // going to have to check this at runtime (for example for class loaders). 1485 is_accessible = referrer_class->CanAccess(resolved_class); 1486 } 1487 bool result = is_accessible && resolved_class->IsInstantiable(); 1488 if (result) { 1489 stats_->TypeDoesntNeedAccessCheck(); 1490 } else { 1491 stats_->TypeNeedsAccessCheck(); 1492 } 1493 return result; 1494} 1495 1496void CompilerDriver::ProcessedInstanceField(bool resolved) { 1497 if (!resolved) { 1498 stats_->UnresolvedInstanceField(); 1499 } else { 1500 stats_->ResolvedInstanceField(); 1501 } 1502} 1503 1504void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1505 if (!resolved) { 1506 stats_->UnresolvedStaticField(); 1507 } else if (local) { 1508 stats_->ResolvedLocalStaticField(); 1509 } else { 1510 stats_->ResolvedStaticField(); 1511 } 1512} 1513 1514ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1515 const DexCompilationUnit* mUnit, bool is_put, 1516 const ScopedObjectAccess& soa) { 1517 // Try to resolve the field and compiling method's class. 1518 ArtField* resolved_field; 1519 mirror::Class* referrer_class; 1520 Handle<mirror::DexCache> dex_cache(mUnit->GetDexCache()); 1521 { 1522 Handle<mirror::ClassLoader> class_loader_handle = mUnit->GetClassLoader(); 1523 resolved_field = ResolveField(soa, dex_cache, class_loader_handle, mUnit, field_idx, false); 1524 referrer_class = resolved_field != nullptr 1525 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader_handle, mUnit) : nullptr; 1526 } 1527 bool can_link = false; 1528 if (resolved_field != nullptr && referrer_class != nullptr) { 1529 std::pair<bool, bool> fast_path = IsFastInstanceField( 1530 dex_cache.Get(), referrer_class, resolved_field, field_idx); 1531 can_link = is_put ? fast_path.second : fast_path.first; 1532 } 1533 ProcessedInstanceField(can_link); 1534 return can_link ? resolved_field : nullptr; 1535} 1536 1537bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1538 bool is_put, MemberOffset* field_offset, 1539 bool* is_volatile) { 1540 ScopedObjectAccess soa(Thread::Current()); 1541 ArtField* resolved_field = ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa); 1542 1543 if (resolved_field == nullptr) { 1544 // Conservative defaults. 1545 *is_volatile = true; 1546 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1547 return false; 1548 } else { 1549 *is_volatile = resolved_field->IsVolatile(); 1550 *field_offset = resolved_field->GetOffset(); 1551 return true; 1552 } 1553} 1554 1555const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1556 uint32_t method_idx) const { 1557 MethodReference ref(dex_file, method_idx); 1558 return verification_results_->GetVerifiedMethod(ref); 1559} 1560 1561bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1562 if (!compiler_options_->IsVerificationEnabled()) { 1563 // If we didn't verify, every cast has to be treated as non-safe. 1564 return false; 1565 } 1566 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1567 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1568 if (result) { 1569 stats_->SafeCast(); 1570 } else { 1571 stats_->NotASafeCast(); 1572 } 1573 return result; 1574} 1575 1576class CompilationVisitor { 1577 public: 1578 virtual ~CompilationVisitor() {} 1579 virtual void Visit(size_t index) = 0; 1580}; 1581 1582class ParallelCompilationManager { 1583 public: 1584 ParallelCompilationManager(ClassLinker* class_linker, 1585 jobject class_loader, 1586 CompilerDriver* compiler, 1587 const DexFile* dex_file, 1588 const std::vector<const DexFile*>& dex_files, 1589 ThreadPool* thread_pool) 1590 : index_(0), 1591 class_linker_(class_linker), 1592 class_loader_(class_loader), 1593 compiler_(compiler), 1594 dex_file_(dex_file), 1595 dex_files_(dex_files), 1596 thread_pool_(thread_pool) {} 1597 1598 ClassLinker* GetClassLinker() const { 1599 CHECK(class_linker_ != nullptr); 1600 return class_linker_; 1601 } 1602 1603 jobject GetClassLoader() const { 1604 return class_loader_; 1605 } 1606 1607 CompilerDriver* GetCompiler() const { 1608 CHECK(compiler_ != nullptr); 1609 return compiler_; 1610 } 1611 1612 const DexFile* GetDexFile() const { 1613 CHECK(dex_file_ != nullptr); 1614 return dex_file_; 1615 } 1616 1617 const std::vector<const DexFile*>& GetDexFiles() const { 1618 return dex_files_; 1619 } 1620 1621 void ForAll(size_t begin, size_t end, CompilationVisitor* visitor, size_t work_units) 1622 REQUIRES(!*Locks::mutator_lock_) { 1623 Thread* self = Thread::Current(); 1624 self->AssertNoPendingException(); 1625 CHECK_GT(work_units, 0U); 1626 1627 index_.StoreRelaxed(begin); 1628 for (size_t i = 0; i < work_units; ++i) { 1629 thread_pool_->AddTask(self, new ForAllClosure(this, end, visitor)); 1630 } 1631 thread_pool_->StartWorkers(self); 1632 1633 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1634 // thread destructor's called below perform join). 1635 CHECK_NE(self->GetState(), kRunnable); 1636 1637 // Wait for all the worker threads to finish. 1638 thread_pool_->Wait(self, true, false); 1639 1640 // And stop the workers accepting jobs. 1641 thread_pool_->StopWorkers(self); 1642 } 1643 1644 size_t NextIndex() { 1645 return index_.FetchAndAddSequentiallyConsistent(1); 1646 } 1647 1648 private: 1649 class ForAllClosure : public Task { 1650 public: 1651 ForAllClosure(ParallelCompilationManager* manager, size_t end, CompilationVisitor* visitor) 1652 : manager_(manager), 1653 end_(end), 1654 visitor_(visitor) {} 1655 1656 virtual void Run(Thread* self) { 1657 while (true) { 1658 const size_t index = manager_->NextIndex(); 1659 if (UNLIKELY(index >= end_)) { 1660 break; 1661 } 1662 visitor_->Visit(index); 1663 self->AssertNoPendingException(); 1664 } 1665 } 1666 1667 virtual void Finalize() { 1668 delete this; 1669 } 1670 1671 private: 1672 ParallelCompilationManager* const manager_; 1673 const size_t end_; 1674 CompilationVisitor* const visitor_; 1675 }; 1676 1677 AtomicInteger index_; 1678 ClassLinker* const class_linker_; 1679 const jobject class_loader_; 1680 CompilerDriver* const compiler_; 1681 const DexFile* const dex_file_; 1682 const std::vector<const DexFile*>& dex_files_; 1683 ThreadPool* const thread_pool_; 1684 1685 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1686}; 1687 1688// A fast version of SkipClass above if the class pointer is available 1689// that avoids the expensive FindInClassPath search. 1690static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1691 REQUIRES_SHARED(Locks::mutator_lock_) { 1692 DCHECK(klass != nullptr); 1693 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1694 if (&dex_file != &original_dex_file) { 1695 if (class_loader == nullptr) { 1696 LOG(WARNING) << "Skipping class " << klass->PrettyDescriptor() << " from " 1697 << dex_file.GetLocation() << " previously found in " 1698 << original_dex_file.GetLocation(); 1699 } 1700 return true; 1701 } 1702 return false; 1703} 1704 1705static void CheckAndClearResolveException(Thread* self) 1706 REQUIRES_SHARED(Locks::mutator_lock_) { 1707 CHECK(self->IsExceptionPending()); 1708 mirror::Throwable* exception = self->GetException(); 1709 std::string temp; 1710 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1711 const char* expected_exceptions[] = { 1712 "Ljava/lang/IllegalAccessError;", 1713 "Ljava/lang/IncompatibleClassChangeError;", 1714 "Ljava/lang/InstantiationError;", 1715 "Ljava/lang/LinkageError;", 1716 "Ljava/lang/NoClassDefFoundError;", 1717 "Ljava/lang/NoSuchFieldError;", 1718 "Ljava/lang/NoSuchMethodError;" 1719 }; 1720 bool found = false; 1721 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1722 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1723 found = true; 1724 } 1725 } 1726 if (!found) { 1727 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1728 } 1729 self->ClearException(); 1730} 1731 1732bool CompilerDriver::RequiresConstructorBarrier(const DexFile& dex_file, 1733 uint16_t class_def_idx) const { 1734 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx); 1735 const uint8_t* class_data = dex_file.GetClassData(class_def); 1736 if (class_data == nullptr) { 1737 // Empty class such as a marker interface. 1738 return false; 1739 } 1740 ClassDataItemIterator it(dex_file, class_data); 1741 while (it.HasNextStaticField()) { 1742 it.Next(); 1743 } 1744 // We require a constructor barrier if there are final instance fields. 1745 while (it.HasNextInstanceField()) { 1746 if (it.MemberIsFinal()) { 1747 return true; 1748 } 1749 it.Next(); 1750 } 1751 return false; 1752} 1753 1754class ResolveClassFieldsAndMethodsVisitor : public CompilationVisitor { 1755 public: 1756 explicit ResolveClassFieldsAndMethodsVisitor(const ParallelCompilationManager* manager) 1757 : manager_(manager) {} 1758 1759 void Visit(size_t class_def_index) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1760 ATRACE_CALL(); 1761 Thread* const self = Thread::Current(); 1762 jobject jclass_loader = manager_->GetClassLoader(); 1763 const DexFile& dex_file = *manager_->GetDexFile(); 1764 ClassLinker* class_linker = manager_->GetClassLinker(); 1765 1766 // If an instance field is final then we need to have a barrier on the return, static final 1767 // fields are assigned within the lock held for class initialization. Conservatively assume 1768 // constructor barriers are always required. 1769 bool requires_constructor_barrier = true; 1770 1771 // Method and Field are the worst. We can't resolve without either 1772 // context from the code use (to disambiguate virtual vs direct 1773 // method and instance vs static field) or from class 1774 // definitions. While the compiler will resolve what it can as it 1775 // needs it, here we try to resolve fields and methods used in class 1776 // definitions, since many of them many never be referenced by 1777 // generated code. 1778 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1779 ScopedObjectAccess soa(self); 1780 StackHandleScope<2> hs(soa.Self()); 1781 Handle<mirror::ClassLoader> class_loader( 1782 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 1783 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 1784 soa.Self(), dex_file))); 1785 // Resolve the class. 1786 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1787 class_loader); 1788 bool resolve_fields_and_methods; 1789 if (klass == nullptr) { 1790 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1791 // attempt to resolve methods and fields when there is no declaring class. 1792 CheckAndClearResolveException(soa.Self()); 1793 resolve_fields_and_methods = false; 1794 } else { 1795 // We successfully resolved a class, should we skip it? 1796 if (SkipClass(jclass_loader, dex_file, klass)) { 1797 return; 1798 } 1799 // We want to resolve the methods and fields eagerly. 1800 resolve_fields_and_methods = true; 1801 } 1802 // Note the class_data pointer advances through the headers, 1803 // static fields, instance fields, direct methods, and virtual 1804 // methods. 1805 const uint8_t* class_data = dex_file.GetClassData(class_def); 1806 if (class_data == nullptr) { 1807 // Empty class such as a marker interface. 1808 requires_constructor_barrier = false; 1809 } else { 1810 ClassDataItemIterator it(dex_file, class_data); 1811 while (it.HasNextStaticField()) { 1812 if (resolve_fields_and_methods) { 1813 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1814 dex_cache, class_loader, true); 1815 if (field == nullptr) { 1816 CheckAndClearResolveException(soa.Self()); 1817 } 1818 } 1819 it.Next(); 1820 } 1821 // We require a constructor barrier if there are final instance fields. 1822 requires_constructor_barrier = false; 1823 while (it.HasNextInstanceField()) { 1824 if (it.MemberIsFinal()) { 1825 requires_constructor_barrier = true; 1826 } 1827 if (resolve_fields_and_methods) { 1828 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1829 dex_cache, class_loader, false); 1830 if (field == nullptr) { 1831 CheckAndClearResolveException(soa.Self()); 1832 } 1833 } 1834 it.Next(); 1835 } 1836 if (resolve_fields_and_methods) { 1837 while (it.HasNextDirectMethod()) { 1838 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1839 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1840 it.GetMethodInvokeType(class_def)); 1841 if (method == nullptr) { 1842 CheckAndClearResolveException(soa.Self()); 1843 } 1844 it.Next(); 1845 } 1846 while (it.HasNextVirtualMethod()) { 1847 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 1848 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 1849 it.GetMethodInvokeType(class_def)); 1850 if (method == nullptr) { 1851 CheckAndClearResolveException(soa.Self()); 1852 } 1853 it.Next(); 1854 } 1855 DCHECK(!it.HasNext()); 1856 } 1857 } 1858 manager_->GetCompiler()->SetRequiresConstructorBarrier(self, 1859 &dex_file, 1860 class_def_index, 1861 requires_constructor_barrier); 1862 } 1863 1864 private: 1865 const ParallelCompilationManager* const manager_; 1866}; 1867 1868class ResolveTypeVisitor : public CompilationVisitor { 1869 public: 1870 explicit ResolveTypeVisitor(const ParallelCompilationManager* manager) : manager_(manager) { 1871 } 1872 void Visit(size_t type_idx) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1873 // Class derived values are more complicated, they require the linker and loader. 1874 ScopedObjectAccess soa(Thread::Current()); 1875 ClassLinker* class_linker = manager_->GetClassLinker(); 1876 const DexFile& dex_file = *manager_->GetDexFile(); 1877 StackHandleScope<2> hs(soa.Self()); 1878 Handle<mirror::ClassLoader> class_loader( 1879 hs.NewHandle(soa.Decode<mirror::ClassLoader>(manager_->GetClassLoader()))); 1880 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->RegisterDexFile( 1881 dex_file, 1882 class_loader.Get()))); 1883 ObjPtr<mirror::Class> klass = (dex_cache != nullptr) 1884 ? class_linker->ResolveType(dex_file, dex::TypeIndex(type_idx), dex_cache, class_loader) 1885 : nullptr; 1886 1887 if (klass == nullptr) { 1888 soa.Self()->AssertPendingException(); 1889 mirror::Throwable* exception = soa.Self()->GetException(); 1890 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1891 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 1892 // There's little point continuing compilation if the heap is exhausted. 1893 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1894 } 1895 soa.Self()->ClearException(); 1896 } 1897 } 1898 1899 private: 1900 const ParallelCompilationManager* const manager_; 1901}; 1902 1903void CompilerDriver::ResolveDexFile(jobject class_loader, 1904 const DexFile& dex_file, 1905 const std::vector<const DexFile*>& dex_files, 1906 ThreadPool* thread_pool, 1907 size_t thread_count, 1908 TimingLogger* timings) { 1909 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1910 1911 // TODO: we could resolve strings here, although the string table is largely filled with class 1912 // and method names. 1913 1914 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1915 thread_pool); 1916 if (GetCompilerOptions().IsBootImage()) { 1917 // For images we resolve all types, such as array, whereas for applications just those with 1918 // classdefs are resolved by ResolveClassFieldsAndMethods. 1919 TimingLogger::ScopedTiming t("Resolve Types", timings); 1920 ResolveTypeVisitor visitor(&context); 1921 context.ForAll(0, dex_file.NumTypeIds(), &visitor, thread_count); 1922 } 1923 1924 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 1925 ResolveClassFieldsAndMethodsVisitor visitor(&context); 1926 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 1927} 1928 1929void CompilerDriver::SetVerified(jobject class_loader, 1930 const std::vector<const DexFile*>& dex_files, 1931 TimingLogger* timings) { 1932 // This can be run in parallel. 1933 for (const DexFile* dex_file : dex_files) { 1934 CHECK(dex_file != nullptr); 1935 SetVerifiedDexFile(class_loader, 1936 *dex_file, 1937 dex_files, 1938 parallel_thread_pool_.get(), 1939 parallel_thread_count_, 1940 timings); 1941 } 1942} 1943 1944static void PopulateVerifiedMethods(const DexFile& dex_file, 1945 uint32_t class_def_index, 1946 VerificationResults* verification_results) { 1947 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1948 const uint8_t* class_data = dex_file.GetClassData(class_def); 1949 if (class_data == nullptr) { 1950 return; 1951 } 1952 ClassDataItemIterator it(dex_file, class_data); 1953 // Skip fields 1954 while (it.HasNextStaticField()) { 1955 it.Next(); 1956 } 1957 while (it.HasNextInstanceField()) { 1958 it.Next(); 1959 } 1960 1961 while (it.HasNextDirectMethod()) { 1962 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1963 it.Next(); 1964 } 1965 1966 while (it.HasNextVirtualMethod()) { 1967 verification_results->CreateVerifiedMethodFor(MethodReference(&dex_file, it.GetMemberIndex())); 1968 it.Next(); 1969 } 1970 DCHECK(!it.HasNext()); 1971} 1972 1973static void LoadAndUpdateStatus(const DexFile& dex_file, 1974 const DexFile::ClassDef& class_def, 1975 mirror::Class::Status status, 1976 Handle<mirror::ClassLoader> class_loader, 1977 Thread* self) 1978 REQUIRES_SHARED(Locks::mutator_lock_) { 1979 StackHandleScope<1> hs(self); 1980 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1981 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1982 Handle<mirror::Class> cls(hs.NewHandle<mirror::Class>( 1983 class_linker->FindClass(self, descriptor, class_loader))); 1984 if (cls != nullptr) { 1985 // Check that the class is resolved with the current dex file. We might get 1986 // a boot image class, or a class in a different dex file for multidex, and 1987 // we should not update the status in that case. 1988 if (&cls->GetDexFile() == &dex_file) { 1989 ObjectLock<mirror::Class> lock(self, cls); 1990 mirror::Class::SetStatus(cls, status, self); 1991 } 1992 } else { 1993 DCHECK(self->IsExceptionPending()); 1994 self->ClearException(); 1995 } 1996} 1997 1998bool CompilerDriver::FastVerify(jobject jclass_loader, 1999 const std::vector<const DexFile*>& dex_files, 2000 TimingLogger* timings) { 2001 verifier::VerifierDeps* verifier_deps = 2002 Runtime::Current()->GetCompilerCallbacks()->GetVerifierDeps(); 2003 // If there is an existing `VerifierDeps`, try to use it for fast verification. 2004 if (verifier_deps == nullptr) { 2005 return false; 2006 } 2007 TimingLogger::ScopedTiming t("Fast Verify", timings); 2008 ScopedObjectAccess soa(Thread::Current()); 2009 StackHandleScope<2> hs(soa.Self()); 2010 Handle<mirror::ClassLoader> class_loader( 2011 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2012 if (!verifier_deps->ValidateDependencies(class_loader, soa.Self())) { 2013 return false; 2014 } 2015 2016 bool compiler_only_verifies = !GetCompilerOptions().IsAnyMethodCompilationEnabled(); 2017 2018 // We successfully validated the dependencies, now update class status 2019 // of verified classes. Note that the dependencies also record which classes 2020 // could not be fully verified; we could try again, but that would hurt verification 2021 // time. So instead we assume these classes still need to be verified at 2022 // runtime. 2023 for (const DexFile* dex_file : dex_files) { 2024 // Fetch the list of unverified classes and turn it into a set for faster 2025 // lookups. 2026 const std::vector<dex::TypeIndex>& unverified_classes = 2027 verifier_deps->GetUnverifiedClasses(*dex_file); 2028 std::set<dex::TypeIndex> set(unverified_classes.begin(), unverified_classes.end()); 2029 for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) { 2030 const DexFile::ClassDef& class_def = dex_file->GetClassDef(i); 2031 if (set.find(class_def.class_idx_) == set.end()) { 2032 if (compiler_only_verifies) { 2033 // Just update the compiled_classes_ map. The compiler doesn't need to resolve 2034 // the type. 2035 compiled_classes_.Overwrite( 2036 ClassReference(dex_file, i), new CompiledClass(mirror::Class::kStatusVerified)); 2037 } else { 2038 // Update the class status, so later compilation stages know they don't need to verify 2039 // the class. 2040 LoadAndUpdateStatus( 2041 *dex_file, class_def, mirror::Class::kStatusVerified, class_loader, soa.Self()); 2042 // Create `VerifiedMethod`s for each methods, the compiler expects one for 2043 // quickening or compiling. 2044 // Note that this means: 2045 // - We're only going to compile methods that did verify. 2046 // - Quickening will not do checkcast ellision. 2047 // TODO(ngeoffray): Reconsider this once we refactor compiler filters. 2048 PopulateVerifiedMethods(*dex_file, i, verification_results_); 2049 } 2050 } else if (!compiler_only_verifies) { 2051 // Make sure later compilation stages know they should not try to verify 2052 // this class again. 2053 LoadAndUpdateStatus(*dex_file, 2054 class_def, 2055 mirror::Class::kStatusRetryVerificationAtRuntime, 2056 class_loader, 2057 soa.Self()); 2058 } 2059 } 2060 } 2061 return true; 2062} 2063 2064void CompilerDriver::Verify(jobject jclass_loader, 2065 const std::vector<const DexFile*>& dex_files, 2066 TimingLogger* timings) { 2067 if (FastVerify(jclass_loader, dex_files, timings)) { 2068 return; 2069 } 2070 2071 // If there is no existing `verifier_deps` (because of non-existing vdex), or 2072 // the existing `verifier_deps` is not valid anymore, create a new one for 2073 // non boot image compilation. The verifier will need it to record the new dependencies. 2074 // Then dex2oat can update the vdex file with these new dependencies. 2075 if (!GetCompilerOptions().IsBootImage()) { 2076 // Create the main VerifierDeps, and set it to this thread. 2077 verifier::VerifierDeps* verifier_deps = new verifier::VerifierDeps(dex_files); 2078 Runtime::Current()->GetCompilerCallbacks()->SetVerifierDeps(verifier_deps); 2079 Thread::Current()->SetVerifierDeps(verifier_deps); 2080 // Create per-thread VerifierDeps to avoid contention on the main one. 2081 // We will merge them after verification. 2082 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2083 worker->GetThread()->SetVerifierDeps(new verifier::VerifierDeps(dex_files)); 2084 } 2085 } 2086 2087 // Note: verification should not be pulling in classes anymore when compiling the boot image, 2088 // as all should have been resolved before. As such, doing this in parallel should still 2089 // be deterministic. 2090 for (const DexFile* dex_file : dex_files) { 2091 CHECK(dex_file != nullptr); 2092 VerifyDexFile(jclass_loader, 2093 *dex_file, 2094 dex_files, 2095 parallel_thread_pool_.get(), 2096 parallel_thread_count_, 2097 timings); 2098 } 2099 2100 if (!GetCompilerOptions().IsBootImage()) { 2101 // Merge all VerifierDeps into the main one. 2102 verifier::VerifierDeps* verifier_deps = Thread::Current()->GetVerifierDeps(); 2103 for (ThreadPoolWorker* worker : parallel_thread_pool_->GetWorkers()) { 2104 verifier::VerifierDeps* thread_deps = worker->GetThread()->GetVerifierDeps(); 2105 worker->GetThread()->SetVerifierDeps(nullptr); 2106 verifier_deps->MergeWith(*thread_deps, dex_files);; 2107 delete thread_deps; 2108 } 2109 Thread::Current()->SetVerifierDeps(nullptr); 2110 } 2111} 2112 2113class VerifyClassVisitor : public CompilationVisitor { 2114 public: 2115 VerifyClassVisitor(const ParallelCompilationManager* manager, verifier::HardFailLogMode log_level) 2116 : manager_(manager), log_level_(log_level) {} 2117 2118 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2119 ATRACE_CALL(); 2120 ScopedObjectAccess soa(Thread::Current()); 2121 const DexFile& dex_file = *manager_->GetDexFile(); 2122 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2123 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2124 ClassLinker* class_linker = manager_->GetClassLinker(); 2125 jobject jclass_loader = manager_->GetClassLoader(); 2126 StackHandleScope<3> hs(soa.Self()); 2127 Handle<mirror::ClassLoader> class_loader( 2128 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2129 Handle<mirror::Class> klass( 2130 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2131 verifier::MethodVerifier::FailureKind failure_kind; 2132 if (klass == nullptr) { 2133 CHECK(soa.Self()->IsExceptionPending()); 2134 soa.Self()->ClearException(); 2135 2136 /* 2137 * At compile time, we can still structurally verify the class even if FindClass fails. 2138 * This is to ensure the class is structurally sound for compilation. An unsound class 2139 * will be rejected by the verifier and later skipped during compilation in the compiler. 2140 */ 2141 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 2142 soa.Self(), dex_file))); 2143 std::string error_msg; 2144 failure_kind = 2145 verifier::MethodVerifier::VerifyClass(soa.Self(), 2146 &dex_file, 2147 dex_cache, 2148 class_loader, 2149 class_def, 2150 Runtime::Current()->GetCompilerCallbacks(), 2151 true /* allow soft failures */, 2152 log_level_, 2153 &error_msg); 2154 if (failure_kind == verifier::MethodVerifier::kHardFailure) { 2155 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 2156 << " because: " << error_msg; 2157 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2158 } 2159 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 2160 CHECK(klass->IsResolved()) << klass->PrettyClass(); 2161 failure_kind = class_linker->VerifyClass(soa.Self(), klass, log_level_); 2162 2163 if (klass->IsErroneous()) { 2164 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 2165 CHECK(soa.Self()->IsExceptionPending()); 2166 soa.Self()->ClearException(); 2167 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2168 } 2169 2170 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 2171 << klass->PrettyDescriptor() << ": state=" << klass->GetStatus(); 2172 2173 // It is *very* problematic if there are verification errors in the boot classpath. For example, 2174 // we rely on things working OK without verification when the decryption dialog is brought up. 2175 // So abort in a debug build if we find this violated. 2176 if (kIsDebugBuild) { 2177 // TODO(narayan): Remove this special case for signature polymorphic 2178 // invokes once verifier support is fully implemented. 2179 if (manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2180 !android::base::StartsWith(descriptor, "Ljava/lang/invoke/")) { 2181 DCHECK(klass->IsVerified()) << "Boot classpath class " << klass->PrettyClass() 2182 << " failed to fully verify: state= " << klass->GetStatus(); 2183 } 2184 } 2185 } else { 2186 // Make the skip a soft failure, essentially being considered as verify at runtime. 2187 failure_kind = verifier::MethodVerifier::kSoftFailure; 2188 } 2189 verifier::VerifierDeps::MaybeRecordVerificationStatus( 2190 dex_file, class_def.class_idx_, failure_kind); 2191 soa.Self()->AssertNoPendingException(); 2192 } 2193 2194 private: 2195 const ParallelCompilationManager* const manager_; 2196 const verifier::HardFailLogMode log_level_; 2197}; 2198 2199void CompilerDriver::VerifyDexFile(jobject class_loader, 2200 const DexFile& dex_file, 2201 const std::vector<const DexFile*>& dex_files, 2202 ThreadPool* thread_pool, 2203 size_t thread_count, 2204 TimingLogger* timings) { 2205 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2206 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2207 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2208 thread_pool); 2209 verifier::HardFailLogMode log_level = GetCompilerOptions().AbortOnHardVerifierFailure() 2210 ? verifier::HardFailLogMode::kLogInternalFatal 2211 : verifier::HardFailLogMode::kLogWarning; 2212 VerifyClassVisitor visitor(&context, log_level); 2213 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2214} 2215 2216class SetVerifiedClassVisitor : public CompilationVisitor { 2217 public: 2218 explicit SetVerifiedClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2219 2220 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2221 ATRACE_CALL(); 2222 ScopedObjectAccess soa(Thread::Current()); 2223 const DexFile& dex_file = *manager_->GetDexFile(); 2224 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2225 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2226 ClassLinker* class_linker = manager_->GetClassLinker(); 2227 jobject jclass_loader = manager_->GetClassLoader(); 2228 StackHandleScope<3> hs(soa.Self()); 2229 Handle<mirror::ClassLoader> class_loader( 2230 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2231 Handle<mirror::Class> klass( 2232 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2233 // Class might have failed resolution. Then don't set it to verified. 2234 if (klass != nullptr) { 2235 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 2236 // very wrong. 2237 if (klass->IsResolved() && !klass->IsErroneousResolved()) { 2238 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 2239 ObjectLock<mirror::Class> lock(soa.Self(), klass); 2240 // Set class status to verified. 2241 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, soa.Self()); 2242 // Mark methods as pre-verified. If we don't do this, the interpreter will run with 2243 // access checks. 2244 klass->SetSkipAccessChecksFlagOnAllMethods( 2245 GetInstructionSetPointerSize(manager_->GetCompiler()->GetInstructionSet())); 2246 klass->SetVerificationAttempted(); 2247 } 2248 // Record the final class status if necessary. 2249 ClassReference ref(manager_->GetDexFile(), class_def_index); 2250 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2251 } 2252 } else { 2253 Thread* self = soa.Self(); 2254 DCHECK(self->IsExceptionPending()); 2255 self->ClearException(); 2256 } 2257 } 2258 2259 private: 2260 const ParallelCompilationManager* const manager_; 2261}; 2262 2263void CompilerDriver::SetVerifiedDexFile(jobject class_loader, 2264 const DexFile& dex_file, 2265 const std::vector<const DexFile*>& dex_files, 2266 ThreadPool* thread_pool, 2267 size_t thread_count, 2268 TimingLogger* timings) { 2269 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2270 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2271 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2272 thread_pool); 2273 SetVerifiedClassVisitor visitor(&context); 2274 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2275} 2276 2277class InitializeClassVisitor : public CompilationVisitor { 2278 public: 2279 explicit InitializeClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2280 2281 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2282 ATRACE_CALL(); 2283 jobject jclass_loader = manager_->GetClassLoader(); 2284 const DexFile& dex_file = *manager_->GetDexFile(); 2285 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2286 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 2287 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 2288 2289 ScopedObjectAccess soa(Thread::Current()); 2290 StackHandleScope<3> hs(soa.Self()); 2291 Handle<mirror::ClassLoader> class_loader( 2292 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2293 Handle<mirror::Class> klass( 2294 hs.NewHandle(manager_->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 2295 2296 if (klass != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 2297 // Only try to initialize classes that were successfully verified. 2298 if (klass->IsVerified()) { 2299 // Attempt to initialize the class but bail if we either need to initialize the super-class 2300 // or static fields. 2301 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, false); 2302 if (!klass->IsInitialized()) { 2303 // We don't want non-trivial class initialization occurring on multiple threads due to 2304 // deadlock problems. For example, a parent class is initialized (holding its lock) that 2305 // refers to a sub-class in its static/class initializer causing it to try to acquire the 2306 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 2307 // after first initializing its parents, whose locks are acquired. This leads to a 2308 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 2309 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 2310 // than use a special Object for the purpose we use the Class of java.lang.Class. 2311 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 2312 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 2313 // Attempt to initialize allowing initialization of parent classes but still not static 2314 // fields. 2315 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, true); 2316 if (!klass->IsInitialized()) { 2317 // We need to initialize static fields, we only do this for image classes that aren't 2318 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 2319 bool can_init_static_fields = 2320 manager_->GetCompiler()->GetCompilerOptions().IsBootImage() && 2321 manager_->GetCompiler()->IsImageClass(descriptor) && 2322 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 2323 if (can_init_static_fields) { 2324 VLOG(compiler) << "Initializing: " << descriptor; 2325 // TODO multithreading support. We should ensure the current compilation thread has 2326 // exclusive access to the runtime and the transaction. To achieve this, we could use 2327 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 2328 // checks in Thread::AssertThreadSuspensionIsAllowable. 2329 Runtime* const runtime = Runtime::Current(); 2330 Transaction transaction; 2331 2332 // Run the class initializer in transaction mode. 2333 runtime->EnterTransactionMode(&transaction); 2334 const mirror::Class::Status old_status = klass->GetStatus(); 2335 bool success = manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, true, 2336 true); 2337 // TODO we detach transaction from runtime to indicate we quit the transactional 2338 // mode which prevents the GC from visiting objects modified during the transaction. 2339 // Ensure GC is not run so don't access freed objects when aborting transaction. 2340 2341 ScopedAssertNoThreadSuspension ants("Transaction end"); 2342 runtime->ExitTransactionMode(); 2343 2344 if (!success) { 2345 CHECK(soa.Self()->IsExceptionPending()); 2346 mirror::Throwable* exception = soa.Self()->GetException(); 2347 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 2348 << exception->Dump(); 2349 std::ostream* file_log = manager_->GetCompiler()-> 2350 GetCompilerOptions().GetInitFailureOutput(); 2351 if (file_log != nullptr) { 2352 *file_log << descriptor << "\n"; 2353 *file_log << exception->Dump() << "\n"; 2354 } 2355 soa.Self()->ClearException(); 2356 transaction.Rollback(); 2357 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 2358 } 2359 } 2360 } 2361 soa.Self()->AssertNoPendingException(); 2362 } 2363 } 2364 // Record the final class status if necessary. 2365 ClassReference ref(manager_->GetDexFile(), class_def_index); 2366 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2367 } 2368 // Clear any class not found or verification exceptions. 2369 soa.Self()->ClearException(); 2370 } 2371 2372 private: 2373 const ParallelCompilationManager* const manager_; 2374}; 2375 2376void CompilerDriver::InitializeClasses(jobject jni_class_loader, 2377 const DexFile& dex_file, 2378 const std::vector<const DexFile*>& dex_files, 2379 TimingLogger* timings) { 2380 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 2381 2382 // Initialization allocates objects and needs to run single-threaded to be deterministic. 2383 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 2384 ThreadPool* init_thread_pool = force_determinism 2385 ? single_thread_pool_.get() 2386 : parallel_thread_pool_.get(); 2387 size_t init_thread_count = force_determinism ? 1U : parallel_thread_count_; 2388 2389 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2390 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 2391 init_thread_pool); 2392 if (GetCompilerOptions().IsBootImage()) { 2393 // TODO: remove this when transactional mode supports multithreading. 2394 init_thread_count = 1U; 2395 } 2396 InitializeClassVisitor visitor(&context); 2397 context.ForAll(0, dex_file.NumClassDefs(), &visitor, init_thread_count); 2398} 2399 2400class InitializeArrayClassesAndCreateConflictTablesVisitor : public ClassVisitor { 2401 public: 2402 explicit InitializeArrayClassesAndCreateConflictTablesVisitor(VariableSizedHandleScope& hs) 2403 : hs_(hs) {} 2404 2405 virtual bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE 2406 REQUIRES_SHARED(Locks::mutator_lock_) { 2407 if (Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(klass)) { 2408 return true; 2409 } 2410 if (klass->IsArrayClass()) { 2411 StackHandleScope<1> hs(Thread::Current()); 2412 auto h_klass = hs.NewHandleWrapper(&klass); 2413 Runtime::Current()->GetClassLinker()->EnsureInitialized(hs.Self(), h_klass, true, true); 2414 } 2415 // Collect handles since there may be thread suspension in future EnsureInitialized. 2416 to_visit_.push_back(hs_.NewHandle(klass)); 2417 return true; 2418 } 2419 2420 void FillAllIMTAndConflictTables() REQUIRES_SHARED(Locks::mutator_lock_) { 2421 for (Handle<mirror::Class> c : to_visit_) { 2422 // Create the conflict tables. 2423 FillIMTAndConflictTables(c.Get()); 2424 } 2425 } 2426 2427 private: 2428 void FillIMTAndConflictTables(ObjPtr<mirror::Class> klass) 2429 REQUIRES_SHARED(Locks::mutator_lock_) { 2430 if (!klass->ShouldHaveImt()) { 2431 return; 2432 } 2433 if (visited_classes_.find(klass) != visited_classes_.end()) { 2434 return; 2435 } 2436 if (klass->HasSuperClass()) { 2437 FillIMTAndConflictTables(klass->GetSuperClass()); 2438 } 2439 if (!klass->IsTemp()) { 2440 Runtime::Current()->GetClassLinker()->FillIMTAndConflictTables(klass); 2441 } 2442 visited_classes_.insert(klass); 2443 } 2444 2445 VariableSizedHandleScope& hs_; 2446 std::vector<Handle<mirror::Class>> to_visit_; 2447 std::unordered_set<ObjPtr<mirror::Class>, HashObjPtr> visited_classes_; 2448}; 2449 2450void CompilerDriver::InitializeClasses(jobject class_loader, 2451 const std::vector<const DexFile*>& dex_files, 2452 TimingLogger* timings) { 2453 for (size_t i = 0; i != dex_files.size(); ++i) { 2454 const DexFile* dex_file = dex_files[i]; 2455 CHECK(dex_file != nullptr); 2456 InitializeClasses(class_loader, *dex_file, dex_files, timings); 2457 } 2458 if (GetCompilerOptions().IsBootImage() || GetCompilerOptions().IsAppImage()) { 2459 // Make sure that we call EnsureIntiailized on all the array classes to call 2460 // SetVerificationAttempted so that the access flags are set. If we do not do this they get 2461 // changed at runtime resulting in more dirty image pages. 2462 // Also create conflict tables. 2463 // Only useful if we are compiling an image (image_classes_ is not null). 2464 ScopedObjectAccess soa(Thread::Current()); 2465 VariableSizedHandleScope hs(soa.Self()); 2466 InitializeArrayClassesAndCreateConflictTablesVisitor visitor(hs); 2467 Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&visitor); 2468 visitor.FillAllIMTAndConflictTables(); 2469 } 2470 if (GetCompilerOptions().IsBootImage()) { 2471 // Prune garbage objects created during aborted transactions. 2472 Runtime::Current()->GetHeap()->CollectGarbage(true); 2473 } 2474} 2475 2476void CompilerDriver::Compile(jobject class_loader, 2477 const std::vector<const DexFile*>& dex_files, 2478 TimingLogger* timings) { 2479 if (kDebugProfileGuidedCompilation) { 2480 LOG(INFO) << "[ProfileGuidedCompilation] " << 2481 ((profile_compilation_info_ == nullptr) 2482 ? "null" 2483 : profile_compilation_info_->DumpInfo(&dex_files)); 2484 } 2485 2486 DCHECK(current_dex_to_dex_methods_ == nullptr); 2487 for (const DexFile* dex_file : dex_files) { 2488 CHECK(dex_file != nullptr); 2489 CompileDexFile(class_loader, 2490 *dex_file, 2491 dex_files, 2492 parallel_thread_pool_.get(), 2493 parallel_thread_count_, 2494 timings); 2495 const ArenaPool* const arena_pool = Runtime::Current()->GetArenaPool(); 2496 const size_t arena_alloc = arena_pool->GetBytesAllocated(); 2497 max_arena_alloc_ = std::max(arena_alloc, max_arena_alloc_); 2498 Runtime::Current()->ReclaimArenaPoolMemory(); 2499 } 2500 2501 ArrayRef<DexFileMethodSet> dex_to_dex_references; 2502 { 2503 // From this point on, we shall not modify dex_to_dex_references_, so 2504 // just grab a reference to it that we use without holding the mutex. 2505 MutexLock lock(Thread::Current(), dex_to_dex_references_lock_); 2506 dex_to_dex_references = ArrayRef<DexFileMethodSet>(dex_to_dex_references_); 2507 } 2508 for (const auto& method_set : dex_to_dex_references) { 2509 current_dex_to_dex_methods_ = &method_set.GetMethodIndexes(); 2510 CompileDexFile(class_loader, 2511 method_set.GetDexFile(), 2512 dex_files, 2513 parallel_thread_pool_.get(), 2514 parallel_thread_count_, 2515 timings); 2516 } 2517 current_dex_to_dex_methods_ = nullptr; 2518 2519 VLOG(compiler) << "Compile: " << GetMemoryUsageString(false); 2520} 2521 2522class CompileClassVisitor : public CompilationVisitor { 2523 public: 2524 explicit CompileClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2525 2526 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2527 ATRACE_CALL(); 2528 const DexFile& dex_file = *manager_->GetDexFile(); 2529 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2530 ClassLinker* class_linker = manager_->GetClassLinker(); 2531 jobject jclass_loader = manager_->GetClassLoader(); 2532 ClassReference ref(&dex_file, class_def_index); 2533 // Skip compiling classes with generic verifier failures since they will still fail at runtime 2534 if (manager_->GetCompiler()->verification_results_->IsClassRejected(ref)) { 2535 return; 2536 } 2537 // Use a scoped object access to perform to the quick SkipClass check. 2538 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2539 ScopedObjectAccess soa(Thread::Current()); 2540 StackHandleScope<3> hs(soa.Self()); 2541 Handle<mirror::ClassLoader> class_loader( 2542 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader))); 2543 Handle<mirror::Class> klass( 2544 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2545 Handle<mirror::DexCache> dex_cache; 2546 if (klass == nullptr) { 2547 soa.Self()->AssertPendingException(); 2548 soa.Self()->ClearException(); 2549 dex_cache = hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file)); 2550 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 2551 return; 2552 } else { 2553 dex_cache = hs.NewHandle(klass->GetDexCache()); 2554 } 2555 2556 const uint8_t* class_data = dex_file.GetClassData(class_def); 2557 if (class_data == nullptr) { 2558 // empty class, probably a marker interface 2559 return; 2560 } 2561 2562 // Go to native so that we don't block GC during compilation. 2563 ScopedThreadSuspension sts(soa.Self(), kNative); 2564 2565 CompilerDriver* const driver = manager_->GetCompiler(); 2566 2567 // Can we run DEX-to-DEX compiler on this class ? 2568 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 2569 GetDexToDexCompilationLevel(soa.Self(), *driver, jclass_loader, dex_file, class_def); 2570 2571 ClassDataItemIterator it(dex_file, class_data); 2572 // Skip fields 2573 while (it.HasNextStaticField()) { 2574 it.Next(); 2575 } 2576 while (it.HasNextInstanceField()) { 2577 it.Next(); 2578 } 2579 2580 bool compilation_enabled = driver->IsClassToCompile( 2581 dex_file.StringByTypeIdx(class_def.class_idx_)); 2582 2583 // Compile direct methods 2584 int64_t previous_direct_method_idx = -1; 2585 while (it.HasNextDirectMethod()) { 2586 uint32_t method_idx = it.GetMemberIndex(); 2587 if (method_idx == previous_direct_method_idx) { 2588 // smali can create dex files with two encoded_methods sharing the same method_idx 2589 // http://code.google.com/p/smali/issues/detail?id=119 2590 it.Next(); 2591 continue; 2592 } 2593 previous_direct_method_idx = method_idx; 2594 CompileMethod(soa.Self(), 2595 driver, 2596 it.GetMethodCodeItem(), 2597 it.GetMethodAccessFlags(), 2598 it.GetMethodInvokeType(class_def), 2599 class_def_index, 2600 method_idx, 2601 class_loader, 2602 dex_file, 2603 dex_to_dex_compilation_level, 2604 compilation_enabled, 2605 dex_cache); 2606 it.Next(); 2607 } 2608 // Compile virtual methods 2609 int64_t previous_virtual_method_idx = -1; 2610 while (it.HasNextVirtualMethod()) { 2611 uint32_t method_idx = it.GetMemberIndex(); 2612 if (method_idx == previous_virtual_method_idx) { 2613 // smali can create dex files with two encoded_methods sharing the same method_idx 2614 // http://code.google.com/p/smali/issues/detail?id=119 2615 it.Next(); 2616 continue; 2617 } 2618 previous_virtual_method_idx = method_idx; 2619 CompileMethod(soa.Self(), 2620 driver, it.GetMethodCodeItem(), 2621 it.GetMethodAccessFlags(), 2622 it.GetMethodInvokeType(class_def), 2623 class_def_index, 2624 method_idx, 2625 class_loader, 2626 dex_file, 2627 dex_to_dex_compilation_level, 2628 compilation_enabled, 2629 dex_cache); 2630 it.Next(); 2631 } 2632 DCHECK(!it.HasNext()); 2633 } 2634 2635 private: 2636 const ParallelCompilationManager* const manager_; 2637}; 2638 2639void CompilerDriver::CompileDexFile(jobject class_loader, 2640 const DexFile& dex_file, 2641 const std::vector<const DexFile*>& dex_files, 2642 ThreadPool* thread_pool, 2643 size_t thread_count, 2644 TimingLogger* timings) { 2645 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2646 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2647 &dex_file, dex_files, thread_pool); 2648 CompileClassVisitor visitor(&context); 2649 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2650} 2651 2652void CompilerDriver::AddCompiledMethod(const MethodReference& method_ref, 2653 CompiledMethod* const compiled_method, 2654 size_t non_relative_linker_patch_count) { 2655 DCHECK(GetCompiledMethod(method_ref) == nullptr) 2656 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2657 MethodTable::InsertResult result = compiled_methods_.Insert(method_ref, 2658 /*expected*/ nullptr, 2659 compiled_method); 2660 CHECK(result == MethodTable::kInsertResultSuccess); 2661 non_relative_linker_patch_count_.FetchAndAddRelaxed(non_relative_linker_patch_count); 2662 DCHECK(GetCompiledMethod(method_ref) != nullptr) 2663 << method_ref.dex_file->PrettyMethod(method_ref.dex_method_index); 2664} 2665 2666CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2667 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2668 ClassTable::const_iterator it = compiled_classes_.find(ref); 2669 if (it == compiled_classes_.end()) { 2670 return nullptr; 2671 } 2672 CHECK(it->second != nullptr); 2673 return it->second; 2674} 2675 2676void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2677 switch (status) { 2678 case mirror::Class::kStatusNotReady: 2679 case mirror::Class::kStatusErrorResolved: 2680 case mirror::Class::kStatusErrorUnresolved: 2681 case mirror::Class::kStatusRetryVerificationAtRuntime: 2682 case mirror::Class::kStatusVerified: 2683 case mirror::Class::kStatusInitialized: 2684 case mirror::Class::kStatusResolved: 2685 break; // Expected states. 2686 default: 2687 LOG(FATAL) << "Unexpected class status for class " 2688 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2689 << " of " << status; 2690 } 2691 2692 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2693 auto it = compiled_classes_.find(ref); 2694 if (it == compiled_classes_.end()) { 2695 CompiledClass* compiled_class = new CompiledClass(status); 2696 compiled_classes_.Overwrite(ref, compiled_class); 2697 } else if (status > it->second->GetStatus()) { 2698 // Update the status if we now have a greater one. This happens with vdex, 2699 // which records a class is verified, but does not resolve it. 2700 it->second->SetStatus(status); 2701 } 2702} 2703 2704CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2705 CompiledMethod* compiled_method = nullptr; 2706 compiled_methods_.Get(ref, &compiled_method); 2707 return compiled_method; 2708} 2709 2710bool CompilerDriver::IsMethodVerifiedWithoutFailures(uint32_t method_idx, 2711 uint16_t class_def_idx, 2712 const DexFile& dex_file) const { 2713 const VerifiedMethod* verified_method = GetVerifiedMethod(&dex_file, method_idx); 2714 if (verified_method != nullptr) { 2715 return !verified_method->HasVerificationFailures(); 2716 } 2717 2718 // If we can't find verification metadata, check if this is a system class (we trust that system 2719 // classes have their methods verified). If it's not, be conservative and assume the method 2720 // has not been verified successfully. 2721 2722 // TODO: When compiling the boot image it should be safe to assume that everything is verified, 2723 // even if methods are not found in the verification cache. 2724 const char* descriptor = dex_file.GetClassDescriptor(dex_file.GetClassDef(class_def_idx)); 2725 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2726 Thread* self = Thread::Current(); 2727 ScopedObjectAccess soa(self); 2728 bool is_system_class = class_linker->FindSystemClass(self, descriptor) != nullptr; 2729 if (!is_system_class) { 2730 self->ClearException(); 2731 } 2732 return is_system_class; 2733} 2734 2735size_t CompilerDriver::GetNonRelativeLinkerPatchCount() const { 2736 return non_relative_linker_patch_count_.LoadRelaxed(); 2737} 2738 2739void CompilerDriver::SetRequiresConstructorBarrier(Thread* self, 2740 const DexFile* dex_file, 2741 uint16_t class_def_index, 2742 bool requires) { 2743 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2744 requires_constructor_barrier_.emplace(ClassReference(dex_file, class_def_index), requires); 2745} 2746 2747bool CompilerDriver::RequiresConstructorBarrier(Thread* self, 2748 const DexFile* dex_file, 2749 uint16_t class_def_index) { 2750 ClassReference class_ref(dex_file, class_def_index); 2751 { 2752 ReaderMutexLock mu(self, requires_constructor_barrier_lock_); 2753 auto it = requires_constructor_barrier_.find(class_ref); 2754 if (it != requires_constructor_barrier_.end()) { 2755 return it->second; 2756 } 2757 } 2758 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2759 const bool requires = RequiresConstructorBarrier(*dex_file, class_def_index); 2760 requires_constructor_barrier_.emplace(class_ref, requires); 2761 return requires; 2762} 2763 2764std::string CompilerDriver::GetMemoryUsageString(bool extended) const { 2765 std::ostringstream oss; 2766 const gc::Heap* const heap = Runtime::Current()->GetHeap(); 2767 const size_t java_alloc = heap->GetBytesAllocated(); 2768 oss << "arena alloc=" << PrettySize(max_arena_alloc_) << " (" << max_arena_alloc_ << "B)"; 2769 oss << " java alloc=" << PrettySize(java_alloc) << " (" << java_alloc << "B)"; 2770#if defined(__BIONIC__) || defined(__GLIBC__) 2771 const struct mallinfo info = mallinfo(); 2772 const size_t allocated_space = static_cast<size_t>(info.uordblks); 2773 const size_t free_space = static_cast<size_t>(info.fordblks); 2774 oss << " native alloc=" << PrettySize(allocated_space) << " (" << allocated_space << "B)" 2775 << " free=" << PrettySize(free_space) << " (" << free_space << "B)"; 2776#endif 2777 compiled_method_storage_.DumpMemoryUsage(oss, extended); 2778 return oss.str(); 2779} 2780 2781bool CompilerDriver::MayInlineInternal(const DexFile* inlined_from, 2782 const DexFile* inlined_into) const { 2783 // We're not allowed to inline across dex files if we're the no-inline-from dex file. 2784 if (inlined_from != inlined_into && 2785 compiler_options_->GetNoInlineFromDexFile() != nullptr && 2786 ContainsElement(*compiler_options_->GetNoInlineFromDexFile(), inlined_from)) { 2787 return false; 2788 } 2789 2790 return true; 2791} 2792 2793void CompilerDriver::InitializeThreadPools() { 2794 size_t parallel_count = parallel_thread_count_ > 0 ? parallel_thread_count_ - 1 : 0; 2795 parallel_thread_pool_.reset( 2796 new ThreadPool("Compiler driver thread pool", parallel_count)); 2797 single_thread_pool_.reset(new ThreadPool("Single-threaded Compiler driver thread pool", 0)); 2798} 2799 2800void CompilerDriver::FreeThreadPools() { 2801 parallel_thread_pool_.reset(); 2802 single_thread_pool_.reset(); 2803} 2804 2805} // namespace art 2806