compiler_driver.cc revision ffc87076dda9878cb2cc098149bae441d38b9268
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 "art_field-inl.h" 28#include "art_method-inl.h" 29#include "base/stl_util.h" 30#include "base/systrace.h" 31#include "base/time_utils.h" 32#include "base/timing_logger.h" 33#include "class_linker-inl.h" 34#include "compiled_class.h" 35#include "compiled_method.h" 36#include "compiler.h" 37#include "compiler_driver-inl.h" 38#include "dex_compilation_unit.h" 39#include "dex_file-inl.h" 40#include "dex_instruction-inl.h" 41#include "dex/dex_to_dex_compiler.h" 42#include "dex/verification_results.h" 43#include "dex/verified_method.h" 44#include "dex/quick/dex_file_method_inliner.h" 45#include "dex/quick/dex_file_to_method_inliner_map.h" 46#include "driver/compiler_options.h" 47#include "jni_internal.h" 48#include "object_lock.h" 49#include "profiler.h" 50#include "runtime.h" 51#include "gc/accounting/card_table-inl.h" 52#include "gc/accounting/heap_bitmap.h" 53#include "gc/space/image_space.h" 54#include "gc/space/space.h" 55#include "mirror/class_loader.h" 56#include "mirror/class-inl.h" 57#include "mirror/dex_cache-inl.h" 58#include "mirror/object-inl.h" 59#include "mirror/object_array-inl.h" 60#include "mirror/throwable.h" 61#include "scoped_thread_state_change.h" 62#include "ScopedLocalRef.h" 63#include "handle_scope-inl.h" 64#include "thread.h" 65#include "thread_list.h" 66#include "thread_pool.h" 67#include "trampolines/trampoline_compiler.h" 68#include "transaction.h" 69#include "utils/dex_cache_arrays_layout-inl.h" 70#include "utils/swap_space.h" 71#include "verifier/method_verifier.h" 72#include "verifier/method_verifier-inl.h" 73 74namespace art { 75 76static constexpr bool kTimeCompileMethod = !kIsDebugBuild; 77 78// Whether classes-to-compile and methods-to-compile are only applied to the boot image, or, when 79// given, too all compilations. 80static constexpr bool kRestrictCompilationFiltersToImage = true; 81 82// Print additional info during profile guided compilation. 83static constexpr bool kDebugProfileGuidedCompilation = false; 84 85static double Percentage(size_t x, size_t y) { 86 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 87} 88 89static void DumpStat(size_t x, size_t y, const char* str) { 90 if (x == 0 && y == 0) { 91 return; 92 } 93 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 94} 95 96class CompilerDriver::AOTCompilationStats { 97 public: 98 AOTCompilationStats() 99 : stats_lock_("AOT compilation statistics lock"), 100 types_in_dex_cache_(0), types_not_in_dex_cache_(0), 101 strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), 102 resolved_types_(0), unresolved_types_(0), 103 resolved_instance_fields_(0), unresolved_instance_fields_(0), 104 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 105 type_based_devirtualization_(0), 106 safe_casts_(0), not_safe_casts_(0) { 107 for (size_t i = 0; i <= kMaxInvokeType; i++) { 108 resolved_methods_[i] = 0; 109 unresolved_methods_[i] = 0; 110 virtual_made_direct_[i] = 0; 111 direct_calls_to_boot_[i] = 0; 112 direct_methods_to_boot_[i] = 0; 113 } 114 } 115 116 void Dump() { 117 DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); 118 DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); 119 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 120 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 121 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 122 "static fields resolved"); 123 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 124 "static fields local to a class"); 125 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 126 // Note, the code below subtracts the stat value so that when added to the stat value we have 127 // 100% of samples. TODO: clean this up. 128 DumpStat(type_based_devirtualization_, 129 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 130 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 131 type_based_devirtualization_, 132 "virtual/interface calls made direct based on type information"); 133 134 for (size_t i = 0; i <= kMaxInvokeType; i++) { 135 std::ostringstream oss; 136 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 137 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 138 if (virtual_made_direct_[i] > 0) { 139 std::ostringstream oss2; 140 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 141 DumpStat(virtual_made_direct_[i], 142 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 143 oss2.str().c_str()); 144 } 145 if (direct_calls_to_boot_[i] > 0) { 146 std::ostringstream oss2; 147 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 148 DumpStat(direct_calls_to_boot_[i], 149 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 150 oss2.str().c_str()); 151 } 152 if (direct_methods_to_boot_[i] > 0) { 153 std::ostringstream oss2; 154 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 155 DumpStat(direct_methods_to_boot_[i], 156 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 157 oss2.str().c_str()); 158 } 159 } 160 } 161 162// Allow lossy statistics in non-debug builds. 163#ifndef NDEBUG 164#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 165#else 166#define STATS_LOCK() 167#endif 168 169 void TypeInDexCache() REQUIRES(!stats_lock_) { 170 STATS_LOCK(); 171 types_in_dex_cache_++; 172 } 173 174 void TypeNotInDexCache() REQUIRES(!stats_lock_) { 175 STATS_LOCK(); 176 types_not_in_dex_cache_++; 177 } 178 179 void StringInDexCache() REQUIRES(!stats_lock_) { 180 STATS_LOCK(); 181 strings_in_dex_cache_++; 182 } 183 184 void StringNotInDexCache() REQUIRES(!stats_lock_) { 185 STATS_LOCK(); 186 strings_not_in_dex_cache_++; 187 } 188 189 void TypeDoesntNeedAccessCheck() REQUIRES(!stats_lock_) { 190 STATS_LOCK(); 191 resolved_types_++; 192 } 193 194 void TypeNeedsAccessCheck() REQUIRES(!stats_lock_) { 195 STATS_LOCK(); 196 unresolved_types_++; 197 } 198 199 void ResolvedInstanceField() REQUIRES(!stats_lock_) { 200 STATS_LOCK(); 201 resolved_instance_fields_++; 202 } 203 204 void UnresolvedInstanceField() REQUIRES(!stats_lock_) { 205 STATS_LOCK(); 206 unresolved_instance_fields_++; 207 } 208 209 void ResolvedLocalStaticField() REQUIRES(!stats_lock_) { 210 STATS_LOCK(); 211 resolved_local_static_fields_++; 212 } 213 214 void ResolvedStaticField() REQUIRES(!stats_lock_) { 215 STATS_LOCK(); 216 resolved_static_fields_++; 217 } 218 219 void UnresolvedStaticField() REQUIRES(!stats_lock_) { 220 STATS_LOCK(); 221 unresolved_static_fields_++; 222 } 223 224 // Indicate that type information from the verifier led to devirtualization. 225 void PreciseTypeDevirtualization() REQUIRES(!stats_lock_) { 226 STATS_LOCK(); 227 type_based_devirtualization_++; 228 } 229 230 // Indicate that a method of the given type was resolved at compile time. 231 void ResolvedMethod(InvokeType type) REQUIRES(!stats_lock_) { 232 DCHECK_LE(type, kMaxInvokeType); 233 STATS_LOCK(); 234 resolved_methods_[type]++; 235 } 236 237 // Indicate that a method of the given type was unresolved at compile time as it was in an 238 // unknown dex file. 239 void UnresolvedMethod(InvokeType type) REQUIRES(!stats_lock_) { 240 DCHECK_LE(type, kMaxInvokeType); 241 STATS_LOCK(); 242 unresolved_methods_[type]++; 243 } 244 245 // Indicate that a type of virtual method dispatch has been converted into a direct method 246 // dispatch. 247 void VirtualMadeDirect(InvokeType type) REQUIRES(!stats_lock_) { 248 DCHECK(type == kVirtual || type == kInterface || type == kSuper); 249 STATS_LOCK(); 250 virtual_made_direct_[type]++; 251 } 252 253 // Indicate that a method of the given type was able to call directly into boot. 254 void DirectCallsToBoot(InvokeType type) REQUIRES(!stats_lock_) { 255 DCHECK_LE(type, kMaxInvokeType); 256 STATS_LOCK(); 257 direct_calls_to_boot_[type]++; 258 } 259 260 // Indicate that a method of the given type was able to be resolved directly from boot. 261 void DirectMethodsToBoot(InvokeType type) REQUIRES(!stats_lock_) { 262 DCHECK_LE(type, kMaxInvokeType); 263 STATS_LOCK(); 264 direct_methods_to_boot_[type]++; 265 } 266 267 void ProcessedInvoke(InvokeType type, int flags) REQUIRES(!stats_lock_) { 268 STATS_LOCK(); 269 if (flags == 0) { 270 unresolved_methods_[type]++; 271 } else { 272 DCHECK_NE((flags & kFlagMethodResolved), 0); 273 resolved_methods_[type]++; 274 if ((flags & kFlagVirtualMadeDirect) != 0) { 275 virtual_made_direct_[type]++; 276 if ((flags & kFlagPreciseTypeDevirtualization) != 0) { 277 type_based_devirtualization_++; 278 } 279 } else { 280 DCHECK_EQ((flags & kFlagPreciseTypeDevirtualization), 0); 281 } 282 if ((flags & kFlagDirectCallToBoot) != 0) { 283 direct_calls_to_boot_[type]++; 284 } 285 if ((flags & kFlagDirectMethodToBoot) != 0) { 286 direct_methods_to_boot_[type]++; 287 } 288 } 289 } 290 291 // A check-cast could be eliminated due to verifier type analysis. 292 void SafeCast() REQUIRES(!stats_lock_) { 293 STATS_LOCK(); 294 safe_casts_++; 295 } 296 297 // A check-cast couldn't be eliminated due to verifier type analysis. 298 void NotASafeCast() REQUIRES(!stats_lock_) { 299 STATS_LOCK(); 300 not_safe_casts_++; 301 } 302 303 private: 304 Mutex stats_lock_; 305 306 size_t types_in_dex_cache_; 307 size_t types_not_in_dex_cache_; 308 309 size_t strings_in_dex_cache_; 310 size_t strings_not_in_dex_cache_; 311 312 size_t resolved_types_; 313 size_t unresolved_types_; 314 315 size_t resolved_instance_fields_; 316 size_t unresolved_instance_fields_; 317 318 size_t resolved_local_static_fields_; 319 size_t resolved_static_fields_; 320 size_t unresolved_static_fields_; 321 // Type based devirtualization for invoke interface and virtual. 322 size_t type_based_devirtualization_; 323 324 size_t resolved_methods_[kMaxInvokeType + 1]; 325 size_t unresolved_methods_[kMaxInvokeType + 1]; 326 size_t virtual_made_direct_[kMaxInvokeType + 1]; 327 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 328 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 329 330 size_t safe_casts_; 331 size_t not_safe_casts_; 332 333 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 334}; 335 336CompilerDriver::CompilerDriver( 337 const CompilerOptions* compiler_options, 338 VerificationResults* verification_results, 339 DexFileToMethodInlinerMap* method_inliner_map, 340 Compiler::Kind compiler_kind, 341 InstructionSet instruction_set, 342 const InstructionSetFeatures* instruction_set_features, 343 bool boot_image, 344 std::unordered_set<std::string>* image_classes, 345 std::unordered_set<std::string>* compiled_classes, 346 std::unordered_set<std::string>* compiled_methods, 347 size_t thread_count, 348 bool dump_stats, 349 bool dump_passes, 350 CumulativeLogger* timer, 351 int swap_fd, 352 const ProfileCompilationInfo* profile_compilation_info) 353 : compiler_options_(compiler_options), 354 verification_results_(verification_results), 355 method_inliner_map_(method_inliner_map), 356 compiler_(Compiler::Create(this, compiler_kind)), 357 compiler_kind_(compiler_kind), 358 instruction_set_(instruction_set), 359 instruction_set_features_(instruction_set_features), 360 requires_constructor_barrier_lock_("constructor barrier lock"), 361 compiled_classes_lock_("compiled classes lock"), 362 compiled_methods_lock_("compiled method lock"), 363 compiled_methods_(MethodTable::key_compare()), 364 non_relative_linker_patch_count_(0u), 365 boot_image_(boot_image), 366 image_classes_(image_classes), 367 classes_to_compile_(compiled_classes), 368 methods_to_compile_(compiled_methods), 369 had_hard_verifier_failure_(false), 370 parallel_thread_count_(thread_count), 371 stats_(new AOTCompilationStats), 372 dump_stats_(dump_stats), 373 dump_passes_(dump_passes), 374 timings_logger_(timer), 375 compiler_context_(nullptr), 376 support_boot_image_fixup_(instruction_set != kMips && instruction_set != kMips64), 377 dex_files_for_oat_file_(nullptr), 378 compiled_method_storage_(swap_fd), 379 profile_compilation_info_(profile_compilation_info), 380 max_arena_alloc_(0) { 381 DCHECK(compiler_options_ != nullptr); 382 DCHECK(method_inliner_map_ != nullptr); 383 384 compiler_->Init(); 385 386 if (compiler_options->VerifyOnlyProfile()) { 387 CHECK(profile_compilation_info_ != nullptr) << "Requires profile"; 388 } 389 if (boot_image_) { 390 CHECK(image_classes_.get() != nullptr) << "Expected image classes for boot image"; 391 } 392} 393 394CompilerDriver::~CompilerDriver() { 395 Thread* self = Thread::Current(); 396 { 397 MutexLock mu(self, compiled_classes_lock_); 398 STLDeleteValues(&compiled_classes_); 399 } 400 { 401 MutexLock mu(self, compiled_methods_lock_); 402 for (auto& pair : compiled_methods_) { 403 CompiledMethod::ReleaseSwapAllocatedCompiledMethod(this, pair.second); 404 } 405 } 406 compiler_->UnInit(); 407} 408 409 410#define CREATE_TRAMPOLINE(type, abi, offset) \ 411 if (Is64BitInstructionSet(instruction_set_)) { \ 412 return CreateTrampoline64(instruction_set_, abi, \ 413 type ## _ENTRYPOINT_OFFSET(8, offset)); \ 414 } else { \ 415 return CreateTrampoline32(instruction_set_, abi, \ 416 type ## _ENTRYPOINT_OFFSET(4, offset)); \ 417 } 418 419std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateJniDlsymLookup() const { 420 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 421} 422 423std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickGenericJniTrampoline() 424 const { 425 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 426} 427 428std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickImtConflictTrampoline() 429 const { 430 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 431} 432 433std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickResolutionTrampoline() 434 const { 435 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 436} 437 438std::unique_ptr<const std::vector<uint8_t>> CompilerDriver::CreateQuickToInterpreterBridge() 439 const { 440 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 441} 442#undef CREATE_TRAMPOLINE 443 444void CompilerDriver::CompileAll(jobject class_loader, 445 const std::vector<const DexFile*>& dex_files, 446 TimingLogger* timings) { 447 DCHECK(!Runtime::Current()->IsStarted()); 448 449 InitializeThreadPools(); 450 451 VLOG(compiler) << "Before precompile " << GetMemoryUsageString(false); 452 // Precompile: 453 // 1) Load image classes 454 // 2) Resolve all classes 455 // 3) Attempt to verify all classes 456 // 4) Attempt to initialize image classes, and trivially initialized classes 457 PreCompile(class_loader, dex_files, timings); 458 // Compile: 459 // 1) Compile all classes and methods enabled for compilation. May fall back to dex-to-dex 460 // compilation. 461 if (!GetCompilerOptions().VerifyAtRuntime()) { 462 Compile(class_loader, dex_files, timings); 463 } 464 if (dump_stats_) { 465 stats_->Dump(); 466 } 467 468 FreeThreadPools(); 469} 470 471static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 472 Thread* self, const CompilerDriver& driver, Handle<mirror::ClassLoader> class_loader, 473 const DexFile& dex_file, const DexFile::ClassDef& class_def) 474 SHARED_REQUIRES(Locks::mutator_lock_) { 475 auto* const runtime = Runtime::Current(); 476 if (runtime->UseJitCompilation() || driver.GetCompilerOptions().VerifyAtRuntime()) { 477 // Verify at runtime shouldn't dex to dex since we didn't resolve of verify. 478 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 479 } 480 const char* descriptor = dex_file.GetClassDescriptor(class_def); 481 ClassLinker* class_linker = runtime->GetClassLinker(); 482 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 483 if (klass == nullptr) { 484 CHECK(self->IsExceptionPending()); 485 self->ClearException(); 486 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 487 } 488 // DexToDex at the kOptimize level may introduce quickened opcodes, which replace symbolic 489 // references with actual offsets. We cannot re-verify such instructions. 490 // 491 // We store the verification information in the class status in the oat file, which the linker 492 // can validate (checksums) and use to skip load-time verification. It is thus safe to 493 // optimize when a class has been fully verified before. 494 if (klass->IsVerified()) { 495 // Class is verified so we can enable DEX-to-DEX compilation for performance. 496 return optimizer::DexToDexCompilationLevel::kOptimize; 497 } else if (klass->IsCompileTimeVerified()) { 498 // Class verification has soft-failed. Anyway, ensure at least correctness. 499 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 500 return optimizer::DexToDexCompilationLevel::kRequired; 501 } else { 502 // Class verification has failed: do not run DEX-to-DEX compilation. 503 return optimizer::DexToDexCompilationLevel::kDontDexToDexCompile; 504 } 505} 506 507static optimizer::DexToDexCompilationLevel GetDexToDexCompilationLevel( 508 Thread* self, 509 const CompilerDriver& driver, 510 jobject jclass_loader, 511 const DexFile& dex_file, 512 const DexFile::ClassDef& class_def) { 513 ScopedObjectAccess soa(self); 514 StackHandleScope<1> hs(soa.Self()); 515 Handle<mirror::ClassLoader> class_loader( 516 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 517 return GetDexToDexCompilationLevel(self, driver, class_loader, dex_file, class_def); 518} 519 520// Does the runtime for the InstructionSet provide an implementation returned by 521// GetQuickGenericJniStub allowing down calls that aren't compiled using a JNI compiler? 522static bool InstructionSetHasGenericJniStub(InstructionSet isa) { 523 switch (isa) { 524 case kArm: 525 case kArm64: 526 case kThumb2: 527 case kMips: 528 case kMips64: 529 case kX86: 530 case kX86_64: return true; 531 default: return false; 532 } 533} 534 535static void CompileMethod(Thread* self, 536 CompilerDriver* driver, 537 const DexFile::CodeItem* code_item, 538 uint32_t access_flags, 539 InvokeType invoke_type, 540 uint16_t class_def_idx, 541 uint32_t method_idx, 542 jobject class_loader, 543 const DexFile& dex_file, 544 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level, 545 bool compilation_enabled, 546 Handle<mirror::DexCache> dex_cache) 547 REQUIRES(!driver->compiled_methods_lock_) { 548 DCHECK(driver != nullptr); 549 CompiledMethod* compiled_method = nullptr; 550 uint64_t start_ns = kTimeCompileMethod ? NanoTime() : 0; 551 MethodReference method_ref(&dex_file, method_idx); 552 553 if ((access_flags & kAccNative) != 0) { 554 // Are we interpreting only and have support for generic JNI down calls? 555 if (!driver->GetCompilerOptions().IsCompilationEnabled() && 556 InstructionSetHasGenericJniStub(driver->GetInstructionSet())) { 557 // Leaving this empty will trigger the generic JNI version 558 } else { 559 compiled_method = driver->GetCompiler()->JniCompile(access_flags, method_idx, dex_file); 560 CHECK(compiled_method != nullptr); 561 } 562 } else if ((access_flags & kAccAbstract) != 0) { 563 // Abstract methods don't have code. 564 } else { 565 const VerifiedMethod* verified_method = 566 driver->GetVerificationResults()->GetVerifiedMethod(method_ref); 567 bool compile = compilation_enabled && 568 // Basic checks, e.g., not <clinit>. 569 driver->GetVerificationResults() 570 ->IsCandidateForCompilation(method_ref, access_flags) && 571 // Did not fail to create VerifiedMethod metadata. 572 verified_method != nullptr && 573 // Do not have failures that should punt to the interpreter. 574 !verified_method->HasRuntimeThrow() && 575 (verified_method->GetEncounteredVerificationFailures() & 576 (verifier::VERIFY_ERROR_FORCE_INTERPRETER | verifier::VERIFY_ERROR_LOCKING)) == 0 && 577 // Is eligable for compilation by methods-to-compile filter. 578 driver->IsMethodToCompile(method_ref) && 579 driver->ShouldCompileBasedOnProfile(method_ref); 580 581 if (compile) { 582 // NOTE: if compiler declines to compile this method, it will return null. 583 compiled_method = driver->GetCompiler()->Compile(code_item, access_flags, invoke_type, 584 class_def_idx, method_idx, class_loader, 585 dex_file, dex_cache); 586 } 587 if (compiled_method == nullptr && 588 dex_to_dex_compilation_level != optimizer::DexToDexCompilationLevel::kDontDexToDexCompile) { 589 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 590 // Do not optimize if a VerifiedMethod is missing. SafeCast elision, for example, relies on 591 // it. 592 compiled_method = optimizer::ArtCompileDEX( 593 driver, 594 code_item, 595 access_flags, 596 invoke_type, 597 class_def_idx, 598 method_idx, 599 class_loader, 600 dex_file, 601 (verified_method != nullptr) 602 ? dex_to_dex_compilation_level 603 : optimizer::DexToDexCompilationLevel::kRequired); 604 } 605 } 606 if (kTimeCompileMethod) { 607 uint64_t duration_ns = NanoTime() - start_ns; 608 if (duration_ns > MsToNs(driver->GetCompiler()->GetMaximumCompilationTimeBeforeWarning())) { 609 LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) 610 << " took " << PrettyDuration(duration_ns); 611 } 612 } 613 614 if (compiled_method != nullptr) { 615 // Count non-relative linker patches. 616 size_t non_relative_linker_patch_count = 0u; 617 for (const LinkerPatch& patch : compiled_method->GetPatches()) { 618 if (!patch.IsPcRelative()) { 619 ++non_relative_linker_patch_count; 620 } 621 } 622 bool compile_pic = driver->GetCompilerOptions().GetCompilePic(); // Off by default 623 // When compiling with PIC, there should be zero non-relative linker patches 624 CHECK(!compile_pic || non_relative_linker_patch_count == 0u); 625 626 driver->AddCompiledMethod(method_ref, compiled_method, non_relative_linker_patch_count); 627 } 628 629 // Done compiling, delete the verified method to reduce native memory usage. Do not delete in 630 // optimizing compiler, which may need the verified method again for inlining. 631 if (driver->GetCompilerKind() != Compiler::kOptimizing) { 632 driver->GetVerificationResults()->RemoveVerifiedMethod(method_ref); 633 } 634 635 if (self->IsExceptionPending()) { 636 ScopedObjectAccess soa(self); 637 LOG(FATAL) << "Unexpected exception compiling: " << PrettyMethod(method_idx, dex_file) << "\n" 638 << self->GetException()->Dump(); 639 } 640} 641 642void CompilerDriver::CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings) { 643 DCHECK(!Runtime::Current()->IsStarted()); 644 jobject jclass_loader; 645 const DexFile* dex_file; 646 uint16_t class_def_idx; 647 uint32_t method_idx = method->GetDexMethodIndex(); 648 uint32_t access_flags = method->GetAccessFlags(); 649 InvokeType invoke_type = method->GetInvokeType(); 650 StackHandleScope<1> hs(self); 651 Handle<mirror::DexCache> dex_cache(hs.NewHandle(method->GetDexCache())); 652 { 653 ScopedObjectAccessUnchecked soa(self); 654 ScopedLocalRef<jobject> local_class_loader( 655 soa.Env(), soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 656 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 657 // Find the dex_file 658 dex_file = method->GetDexFile(); 659 class_def_idx = method->GetClassDefIndex(); 660 } 661 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 662 663 // Go to native so that we don't block GC during compilation. 664 ScopedThreadSuspension sts(self, kNative); 665 666 std::vector<const DexFile*> dex_files; 667 dex_files.push_back(dex_file); 668 669 InitializeThreadPools(); 670 671 PreCompile(jclass_loader, dex_files, timings); 672 673 // Can we run DEX-to-DEX compiler on this class ? 674 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 675 GetDexToDexCompilationLevel(self, 676 *this, 677 jclass_loader, 678 *dex_file, 679 dex_file->GetClassDef(class_def_idx)); 680 681 CompileMethod(self, 682 this, 683 code_item, 684 access_flags, 685 invoke_type, 686 class_def_idx, 687 method_idx, 688 jclass_loader, 689 *dex_file, 690 dex_to_dex_compilation_level, 691 true, 692 dex_cache); 693 694 FreeThreadPools(); 695 696 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 697} 698 699void CompilerDriver::Resolve(jobject class_loader, 700 const std::vector<const DexFile*>& dex_files, 701 TimingLogger* timings) { 702 // Resolution allocates classes and needs to run single-threaded to be deterministic. 703 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 704 ThreadPool* resolve_thread_pool = force_determinism 705 ? single_thread_pool_.get() 706 : parallel_thread_pool_.get(); 707 size_t resolve_thread_count = force_determinism ? 1U : parallel_thread_count_; 708 709 for (size_t i = 0; i != dex_files.size(); ++i) { 710 const DexFile* dex_file = dex_files[i]; 711 CHECK(dex_file != nullptr); 712 ResolveDexFile(class_loader, 713 *dex_file, 714 dex_files, 715 resolve_thread_pool, 716 resolve_thread_count, 717 timings); 718 } 719} 720 721// Resolve const-strings in the code. Done to have deterministic allocation behavior. Right now 722// this is single-threaded for simplicity. 723// TODO: Collect the relevant string indices in parallel, then allocate them sequentially in a 724// stable order. 725 726static void ResolveConstStrings(CompilerDriver* driver, 727 const DexFile& dex_file, 728 const DexFile::CodeItem* code_item) { 729 if (code_item == nullptr) { 730 // Abstract or native method. 731 return; 732 } 733 734 const uint16_t* code_ptr = code_item->insns_; 735 const uint16_t* code_end = code_item->insns_ + code_item->insns_size_in_code_units_; 736 737 while (code_ptr < code_end) { 738 const Instruction* inst = Instruction::At(code_ptr); 739 switch (inst->Opcode()) { 740 case Instruction::CONST_STRING: { 741 uint32_t string_index = inst->VRegB_21c(); 742 driver->CanAssumeStringIsPresentInDexCache(dex_file, string_index); 743 break; 744 } 745 case Instruction::CONST_STRING_JUMBO: { 746 uint32_t string_index = inst->VRegB_31c(); 747 driver->CanAssumeStringIsPresentInDexCache(dex_file, string_index); 748 break; 749 } 750 751 default: 752 break; 753 } 754 755 code_ptr += inst->SizeInCodeUnits(); 756 } 757} 758 759static void ResolveConstStrings(CompilerDriver* driver, 760 const std::vector<const DexFile*>& dex_files, 761 TimingLogger* timings) { 762 for (const DexFile* dex_file : dex_files) { 763 TimingLogger::ScopedTiming t("Resolve const-string Strings", timings); 764 765 size_t class_def_count = dex_file->NumClassDefs(); 766 for (size_t class_def_index = 0; class_def_index < class_def_count; ++class_def_index) { 767 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index); 768 769 const uint8_t* class_data = dex_file->GetClassData(class_def); 770 if (class_data == nullptr) { 771 // empty class, probably a marker interface 772 continue; 773 } 774 775 ClassDataItemIterator it(*dex_file, class_data); 776 // Skip fields 777 while (it.HasNextStaticField()) { 778 it.Next(); 779 } 780 while (it.HasNextInstanceField()) { 781 it.Next(); 782 } 783 784 bool compilation_enabled = driver->IsClassToCompile( 785 dex_file->StringByTypeIdx(class_def.class_idx_)); 786 if (!compilation_enabled) { 787 // Compilation is skipped, do not resolve const-string in code of this class. 788 // TODO: Make sure that inlining honors this. 789 continue; 790 } 791 792 // Direct methods. 793 int64_t previous_direct_method_idx = -1; 794 while (it.HasNextDirectMethod()) { 795 uint32_t method_idx = it.GetMemberIndex(); 796 if (method_idx == previous_direct_method_idx) { 797 // smali can create dex files with two encoded_methods sharing the same method_idx 798 // http://code.google.com/p/smali/issues/detail?id=119 799 it.Next(); 800 continue; 801 } 802 previous_direct_method_idx = method_idx; 803 ResolveConstStrings(driver, *dex_file, it.GetMethodCodeItem()); 804 it.Next(); 805 } 806 // Virtual methods. 807 int64_t previous_virtual_method_idx = -1; 808 while (it.HasNextVirtualMethod()) { 809 uint32_t method_idx = it.GetMemberIndex(); 810 if (method_idx == previous_virtual_method_idx) { 811 // smali can create dex files with two encoded_methods sharing the same method_idx 812 // http://code.google.com/p/smali/issues/detail?id=119 813 it.Next(); 814 continue; 815 } 816 previous_virtual_method_idx = method_idx; 817 ResolveConstStrings(driver, *dex_file, it.GetMethodCodeItem()); 818 it.Next(); 819 } 820 DCHECK(!it.HasNext()); 821 } 822 } 823} 824 825inline void CompilerDriver::CheckThreadPools() { 826 DCHECK(parallel_thread_pool_ != nullptr); 827 DCHECK(single_thread_pool_ != nullptr); 828} 829 830void CompilerDriver::PreCompile(jobject class_loader, 831 const std::vector<const DexFile*>& dex_files, 832 TimingLogger* timings) { 833 CheckThreadPools(); 834 835 LoadImageClasses(timings); 836 VLOG(compiler) << "LoadImageClasses: " << GetMemoryUsageString(false); 837 838 const bool verification_enabled = compiler_options_->IsVerificationEnabled(); 839 const bool never_verify = compiler_options_->NeverVerify(); 840 const bool verify_only_profile = compiler_options_->VerifyOnlyProfile(); 841 842 // We need to resolve for never_verify since it needs to run dex to dex to add the 843 // RETURN_VOID_NO_BARRIER. 844 // Let the verifier resolve as needed for the verify_only_profile case. 845 if ((never_verify || verification_enabled) && !verify_only_profile) { 846 Resolve(class_loader, dex_files, timings); 847 VLOG(compiler) << "Resolve: " << GetMemoryUsageString(false); 848 } 849 850 if (never_verify) { 851 VLOG(compiler) << "Verify none mode specified, skipping verification."; 852 SetVerified(class_loader, dex_files, timings); 853 } 854 855 if (!verification_enabled) { 856 return; 857 } 858 859 if (GetCompilerOptions().IsForceDeterminism() && IsBootImage()) { 860 // Resolve strings from const-string. Do this now to have a deterministic image. 861 ResolveConstStrings(this, dex_files, timings); 862 VLOG(compiler) << "Resolve const-strings: " << GetMemoryUsageString(false); 863 } 864 865 Verify(class_loader, dex_files, timings); 866 VLOG(compiler) << "Verify: " << GetMemoryUsageString(false); 867 868 if (had_hard_verifier_failure_ && GetCompilerOptions().AbortOnHardVerifierFailure()) { 869 LOG(FATAL) << "Had a hard failure verifying all classes, and was asked to abort in such " 870 << "situations. Please check the log."; 871 } 872 873 InitializeClasses(class_loader, dex_files, timings); 874 VLOG(compiler) << "InitializeClasses: " << GetMemoryUsageString(false); 875 876 UpdateImageClasses(timings); 877 VLOG(compiler) << "UpdateImageClasses: " << GetMemoryUsageString(false); 878} 879 880bool CompilerDriver::IsImageClass(const char* descriptor) const { 881 if (image_classes_ != nullptr) { 882 // If we have a set of image classes, use those. 883 return image_classes_->find(descriptor) != image_classes_->end(); 884 } 885 // No set of image classes, assume we include all the classes. 886 // NOTE: Currently only reachable from InitImageMethodVisitor for the app image case. 887 return !IsBootImage(); 888} 889 890bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 891 if (kRestrictCompilationFiltersToImage && !IsBootImage()) { 892 return true; 893 } 894 895 if (classes_to_compile_ == nullptr) { 896 return true; 897 } 898 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 899} 900 901bool CompilerDriver::IsMethodToCompile(const MethodReference& method_ref) const { 902 if (kRestrictCompilationFiltersToImage && !IsBootImage()) { 903 return true; 904 } 905 906 if (methods_to_compile_ == nullptr) { 907 return true; 908 } 909 910 std::string tmp = PrettyMethod(method_ref.dex_method_index, *method_ref.dex_file, true); 911 return methods_to_compile_->find(tmp.c_str()) != methods_to_compile_->end(); 912} 913 914bool CompilerDriver::ShouldCompileBasedOnProfile(const MethodReference& method_ref) const { 915 if (profile_compilation_info_ == nullptr) { 916 // If we miss profile information it means that we don't do a profile guided compilation. 917 // Return true, and let the other filters decide if the method should be compiled. 918 return true; 919 } 920 bool result = profile_compilation_info_->ContainsMethod(method_ref); 921 922 if (kDebugProfileGuidedCompilation) { 923 LOG(INFO) << "[ProfileGuidedCompilation] " 924 << (result ? "Compiled" : "Skipped") << " method:" 925 << PrettyMethod(method_ref.dex_method_index, *method_ref.dex_file, true); 926 } 927 return result; 928} 929 930bool CompilerDriver::ShouldVerifyClassBasedOnProfile(const DexFile& dex_file, 931 uint16_t class_idx) const { 932 if (!compiler_options_->VerifyOnlyProfile()) { 933 // No profile, verify everything. 934 return true; 935 } 936 DCHECK(profile_compilation_info_ != nullptr); 937 bool result = profile_compilation_info_->ContainsClass(dex_file, class_idx); 938 if (kDebugProfileGuidedCompilation) { 939 LOG(INFO) << "[ProfileGuidedCompilation] " 940 << (result ? "Verified" : "Skipped") << " method:" 941 << dex_file.GetClassDescriptor(dex_file.GetClassDef(class_idx)); 942 } 943 return result; 944} 945 946class ResolveCatchBlockExceptionsClassVisitor : public ClassVisitor { 947 public: 948 ResolveCatchBlockExceptionsClassVisitor( 949 std::set<std::pair<uint16_t, const DexFile*>>& exceptions_to_resolve) 950 : exceptions_to_resolve_(exceptions_to_resolve) {} 951 952 virtual bool operator()(mirror::Class* c) OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_) { 953 const auto pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 954 for (auto& m : c->GetMethods(pointer_size)) { 955 ResolveExceptionsForMethod(&m, pointer_size); 956 } 957 return true; 958 } 959 960 private: 961 void ResolveExceptionsForMethod(ArtMethod* method_handle, size_t pointer_size) 962 SHARED_REQUIRES(Locks::mutator_lock_) { 963 const DexFile::CodeItem* code_item = method_handle->GetCodeItem(); 964 if (code_item == nullptr) { 965 return; // native or abstract method 966 } 967 if (code_item->tries_size_ == 0) { 968 return; // nothing to process 969 } 970 const uint8_t* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 971 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 972 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 973 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 974 bool has_catch_all = false; 975 if (encoded_catch_handler_size <= 0) { 976 encoded_catch_handler_size = -encoded_catch_handler_size; 977 has_catch_all = true; 978 } 979 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 980 uint16_t encoded_catch_handler_handlers_type_idx = 981 DecodeUnsignedLeb128(&encoded_catch_handler_list); 982 // Add to set of types to resolve if not already in the dex cache resolved types 983 if (!method_handle->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx, 984 pointer_size)) { 985 exceptions_to_resolve_.emplace(encoded_catch_handler_handlers_type_idx, 986 method_handle->GetDexFile()); 987 } 988 // ignore address associated with catch handler 989 DecodeUnsignedLeb128(&encoded_catch_handler_list); 990 } 991 if (has_catch_all) { 992 // ignore catch all address 993 DecodeUnsignedLeb128(&encoded_catch_handler_list); 994 } 995 } 996 } 997 998 std::set<std::pair<uint16_t, const DexFile*>>& exceptions_to_resolve_; 999}; 1000 1001class RecordImageClassesVisitor : public ClassVisitor { 1002 public: 1003 explicit RecordImageClassesVisitor(std::unordered_set<std::string>* image_classes) 1004 : image_classes_(image_classes) {} 1005 1006 bool operator()(mirror::Class* klass) OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_) { 1007 std::string temp; 1008 image_classes_->insert(klass->GetDescriptor(&temp)); 1009 return true; 1010 } 1011 1012 private: 1013 std::unordered_set<std::string>* const image_classes_; 1014}; 1015 1016// Make a list of descriptors for classes to include in the image 1017void CompilerDriver::LoadImageClasses(TimingLogger* timings) { 1018 CHECK(timings != nullptr); 1019 if (!IsBootImage()) { 1020 return; 1021 } 1022 1023 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 1024 // Make a first class to load all classes explicitly listed in the file 1025 Thread* self = Thread::Current(); 1026 ScopedObjectAccess soa(self); 1027 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1028 CHECK(image_classes_.get() != nullptr); 1029 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 1030 const std::string& descriptor(*it); 1031 StackHandleScope<1> hs(self); 1032 Handle<mirror::Class> klass( 1033 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 1034 if (klass.Get() == nullptr) { 1035 VLOG(compiler) << "Failed to find class " << descriptor; 1036 image_classes_->erase(it++); 1037 self->ClearException(); 1038 } else { 1039 ++it; 1040 } 1041 } 1042 1043 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 1044 // exceptions are resolved by the verifier when there is a catch block in an interested method. 1045 // Do this here so that exception classes appear to have been specified image classes. 1046 std::set<std::pair<uint16_t, const DexFile*>> unresolved_exception_types; 1047 StackHandleScope<1> hs(self); 1048 Handle<mirror::Class> java_lang_Throwable( 1049 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 1050 do { 1051 unresolved_exception_types.clear(); 1052 ResolveCatchBlockExceptionsClassVisitor visitor(unresolved_exception_types); 1053 class_linker->VisitClasses(&visitor); 1054 for (const std::pair<uint16_t, const DexFile*>& exception_type : unresolved_exception_types) { 1055 uint16_t exception_type_idx = exception_type.first; 1056 const DexFile* dex_file = exception_type.second; 1057 StackHandleScope<2> hs2(self); 1058 Handle<mirror::DexCache> dex_cache(hs2.NewHandle(class_linker->RegisterDexFile( 1059 *dex_file, 1060 Runtime::Current()->GetLinearAlloc()))); 1061 Handle<mirror::Class> klass(hs2.NewHandle( 1062 class_linker->ResolveType(*dex_file, 1063 exception_type_idx, 1064 dex_cache, 1065 ScopedNullHandle<mirror::ClassLoader>()))); 1066 if (klass.Get() == nullptr) { 1067 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 1068 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 1069 LOG(FATAL) << "Failed to resolve class " << descriptor; 1070 } 1071 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 1072 } 1073 // Resolving exceptions may load classes that reference more exceptions, iterate until no 1074 // more are found 1075 } while (!unresolved_exception_types.empty()); 1076 1077 // We walk the roots looking for classes so that we'll pick up the 1078 // above classes plus any classes them depend on such super 1079 // classes, interfaces, and the required ClassLinker roots. 1080 RecordImageClassesVisitor visitor(image_classes_.get()); 1081 class_linker->VisitClasses(&visitor); 1082 1083 CHECK_NE(image_classes_->size(), 0U); 1084} 1085 1086static void MaybeAddToImageClasses(Handle<mirror::Class> c, 1087 std::unordered_set<std::string>* image_classes) 1088 SHARED_REQUIRES(Locks::mutator_lock_) { 1089 Thread* self = Thread::Current(); 1090 StackHandleScope<1> hs(self); 1091 // Make a copy of the handle so that we don't clobber it doing Assign. 1092 MutableHandle<mirror::Class> klass(hs.NewHandle(c.Get())); 1093 std::string temp; 1094 const size_t pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1095 while (!klass->IsObjectClass()) { 1096 const char* descriptor = klass->GetDescriptor(&temp); 1097 std::pair<std::unordered_set<std::string>::iterator, bool> result = 1098 image_classes->insert(descriptor); 1099 if (!result.second) { // Previously inserted. 1100 break; 1101 } 1102 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 1103 for (size_t i = 0; i < klass->NumDirectInterfaces(); ++i) { 1104 StackHandleScope<1> hs2(self); 1105 MaybeAddToImageClasses(hs2.NewHandle(mirror::Class::GetDirectInterface(self, klass, i)), 1106 image_classes); 1107 } 1108 for (auto& m : c->GetVirtualMethods(pointer_size)) { 1109 StackHandleScope<1> hs2(self); 1110 MaybeAddToImageClasses(hs2.NewHandle(m.GetDeclaringClass()), image_classes); 1111 } 1112 if (klass->IsArrayClass()) { 1113 StackHandleScope<1> hs2(self); 1114 MaybeAddToImageClasses(hs2.NewHandle(klass->GetComponentType()), image_classes); 1115 } 1116 klass.Assign(klass->GetSuperClass()); 1117 } 1118} 1119 1120// Keeps all the data for the update together. Also doubles as the reference visitor. 1121// Note: we can use object pointers because we suspend all threads. 1122class ClinitImageUpdate { 1123 public: 1124 static ClinitImageUpdate* Create(std::unordered_set<std::string>* image_class_descriptors, 1125 Thread* self, ClassLinker* linker, std::string* error_msg) { 1126 std::unique_ptr<ClinitImageUpdate> res(new ClinitImageUpdate(image_class_descriptors, self, 1127 linker)); 1128 if (res->dex_cache_class_ == nullptr) { 1129 *error_msg = "Could not find DexCache class."; 1130 return nullptr; 1131 } 1132 1133 return res.release(); 1134 } 1135 1136 ~ClinitImageUpdate() { 1137 // Allow others to suspend again. 1138 self_->EndAssertNoThreadSuspension(old_cause_); 1139 } 1140 1141 // Visitor for VisitReferences. 1142 void operator()(mirror::Object* object, MemberOffset field_offset, bool /* is_static */) const 1143 SHARED_REQUIRES(Locks::mutator_lock_) { 1144 mirror::Object* ref = object->GetFieldObject<mirror::Object>(field_offset); 1145 if (ref != nullptr) { 1146 VisitClinitClassesObject(ref); 1147 } 1148 } 1149 1150 // java.lang.Reference visitor for VisitReferences. 1151 void operator()(mirror::Class* klass ATTRIBUTE_UNUSED, mirror::Reference* ref ATTRIBUTE_UNUSED) 1152 const {} 1153 1154 // Ignore class native roots. 1155 void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) 1156 const {} 1157 void VisitRoot(mirror::CompressedReference<mirror::Object>* root ATTRIBUTE_UNUSED) const {} 1158 1159 void Walk() SHARED_REQUIRES(Locks::mutator_lock_) { 1160 // Use the initial classes as roots for a search. 1161 for (mirror::Class* klass_root : image_classes_) { 1162 VisitClinitClassesObject(klass_root); 1163 } 1164 } 1165 1166 private: 1167 class FindImageClassesVisitor : public ClassVisitor { 1168 public: 1169 explicit FindImageClassesVisitor(ClinitImageUpdate* data) : data_(data) {} 1170 1171 bool operator()(mirror::Class* klass) OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_) { 1172 std::string temp; 1173 const char* name = klass->GetDescriptor(&temp); 1174 if (data_->image_class_descriptors_->find(name) != data_->image_class_descriptors_->end()) { 1175 data_->image_classes_.push_back(klass); 1176 } else { 1177 // Check whether it is initialized and has a clinit. They must be kept, too. 1178 if (klass->IsInitialized() && klass->FindClassInitializer( 1179 Runtime::Current()->GetClassLinker()->GetImagePointerSize()) != nullptr) { 1180 data_->image_classes_.push_back(klass); 1181 } 1182 } 1183 return true; 1184 } 1185 1186 private: 1187 ClinitImageUpdate* const data_; 1188 }; 1189 1190 ClinitImageUpdate(std::unordered_set<std::string>* image_class_descriptors, Thread* self, 1191 ClassLinker* linker) 1192 SHARED_REQUIRES(Locks::mutator_lock_) : 1193 image_class_descriptors_(image_class_descriptors), self_(self) { 1194 CHECK(linker != nullptr); 1195 CHECK(image_class_descriptors != nullptr); 1196 1197 // Make sure nobody interferes with us. 1198 old_cause_ = self->StartAssertNoThreadSuspension("Boot image closure"); 1199 1200 // Find the interesting classes. 1201 dex_cache_class_ = linker->LookupClass(self, "Ljava/lang/DexCache;", 1202 ComputeModifiedUtf8Hash("Ljava/lang/DexCache;"), nullptr); 1203 1204 // Find all the already-marked classes. 1205 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 1206 FindImageClassesVisitor visitor(this); 1207 linker->VisitClasses(&visitor); 1208 } 1209 1210 void VisitClinitClassesObject(mirror::Object* object) const 1211 SHARED_REQUIRES(Locks::mutator_lock_) { 1212 DCHECK(object != nullptr); 1213 if (marked_objects_.find(object) != marked_objects_.end()) { 1214 // Already processed. 1215 return; 1216 } 1217 1218 // Mark it. 1219 marked_objects_.insert(object); 1220 1221 if (object->IsClass()) { 1222 // If it is a class, add it. 1223 StackHandleScope<1> hs(self_); 1224 MaybeAddToImageClasses(hs.NewHandle(object->AsClass()), image_class_descriptors_); 1225 } else { 1226 // Else visit the object's class. 1227 VisitClinitClassesObject(object->GetClass()); 1228 } 1229 1230 // If it is not a DexCache, visit all references. 1231 mirror::Class* klass = object->GetClass(); 1232 if (klass != dex_cache_class_) { 1233 object->VisitReferences(*this, *this); 1234 } 1235 } 1236 1237 mutable std::unordered_set<mirror::Object*> marked_objects_; 1238 std::unordered_set<std::string>* const image_class_descriptors_; 1239 std::vector<mirror::Class*> image_classes_; 1240 const mirror::Class* dex_cache_class_; 1241 Thread* const self_; 1242 const char* old_cause_; 1243 1244 DISALLOW_COPY_AND_ASSIGN(ClinitImageUpdate); 1245}; 1246 1247void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 1248 if (IsBootImage()) { 1249 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 1250 1251 Runtime* runtime = Runtime::Current(); 1252 1253 // Suspend all threads. 1254 ScopedSuspendAll ssa(__FUNCTION__); 1255 1256 std::string error_msg; 1257 std::unique_ptr<ClinitImageUpdate> update(ClinitImageUpdate::Create(image_classes_.get(), 1258 Thread::Current(), 1259 runtime->GetClassLinker(), 1260 &error_msg)); 1261 CHECK(update.get() != nullptr) << error_msg; // TODO: Soft failure? 1262 1263 // Do the marking. 1264 update->Walk(); 1265 } 1266} 1267 1268bool CompilerDriver::CanAssumeClassIsLoaded(mirror::Class* klass) { 1269 Runtime* runtime = Runtime::Current(); 1270 if (!runtime->IsAotCompiler()) { 1271 DCHECK(runtime->UseJitCompilation()); 1272 // Having the klass reference here implies that the klass is already loaded. 1273 return true; 1274 } 1275 if (!IsBootImage()) { 1276 // Assume loaded only if klass is in the boot image. App classes cannot be assumed 1277 // loaded because we don't even know what class loader will be used to load them. 1278 bool class_in_image = runtime->GetHeap()->FindSpaceFromObject(klass, false)->IsImageSpace(); 1279 return class_in_image; 1280 } 1281 std::string temp; 1282 const char* descriptor = klass->GetDescriptor(&temp); 1283 return IsImageClass(descriptor); 1284} 1285 1286bool CompilerDriver::CanAssumeTypeIsPresentInDexCache(Handle<mirror::DexCache> dex_cache, 1287 uint32_t type_idx) { 1288 bool result = false; 1289 if ((IsBootImage() && 1290 IsImageClass(dex_cache->GetDexFile()->StringDataByIdx( 1291 dex_cache->GetDexFile()->GetTypeId(type_idx).descriptor_idx_))) || 1292 Runtime::Current()->UseJitCompilation()) { 1293 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1294 result = (resolved_class != nullptr); 1295 } 1296 1297 if (result) { 1298 stats_->TypeInDexCache(); 1299 } else { 1300 stats_->TypeNotInDexCache(); 1301 } 1302 return result; 1303} 1304 1305bool CompilerDriver::CanAssumeStringIsPresentInDexCache(const DexFile& dex_file, 1306 uint32_t string_idx) { 1307 // See also Compiler::ResolveDexFile 1308 1309 bool result = false; 1310 if (IsBootImage() || Runtime::Current()->UseJitCompilation()) { 1311 ScopedObjectAccess soa(Thread::Current()); 1312 StackHandleScope<1> hs(soa.Self()); 1313 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); 1314 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 1315 soa.Self(), dex_file, false))); 1316 if (IsBootImage()) { 1317 // We resolve all const-string strings when building for the image. 1318 class_linker->ResolveString(dex_file, string_idx, dex_cache); 1319 result = true; 1320 } else { 1321 // Just check whether the dex cache already has the string. 1322 DCHECK(Runtime::Current()->UseJitCompilation()); 1323 result = (dex_cache->GetResolvedString(string_idx) != nullptr); 1324 } 1325 } 1326 if (result) { 1327 stats_->StringInDexCache(); 1328 } else { 1329 stats_->StringNotInDexCache(); 1330 } 1331 return result; 1332} 1333 1334bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, 1335 Handle<mirror::DexCache> dex_cache, 1336 uint32_t type_idx) { 1337 // Get type from dex cache assuming it was populated by the verifier 1338 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1339 if (resolved_class == nullptr) { 1340 stats_->TypeNeedsAccessCheck(); 1341 return false; // Unknown class needs access checks. 1342 } 1343 const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(referrer_idx); 1344 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1345 if (!is_accessible) { 1346 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 1347 if (referrer_class == nullptr) { 1348 stats_->TypeNeedsAccessCheck(); 1349 return false; // Incomplete referrer knowledge needs access check. 1350 } 1351 // Perform access check, will return true if access is ok or false if we're going to have to 1352 // check this at runtime (for example for class loaders). 1353 is_accessible = referrer_class->CanAccess(resolved_class); 1354 } 1355 if (is_accessible) { 1356 stats_->TypeDoesntNeedAccessCheck(); 1357 } else { 1358 stats_->TypeNeedsAccessCheck(); 1359 } 1360 return is_accessible; 1361} 1362 1363bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 1364 Handle<mirror::DexCache> dex_cache, 1365 uint32_t type_idx, 1366 bool* finalizable) { 1367 // Get type from dex cache assuming it was populated by the verifier. 1368 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1369 if (resolved_class == nullptr) { 1370 stats_->TypeNeedsAccessCheck(); 1371 // Be conservative. 1372 *finalizable = true; 1373 return false; // Unknown class needs access checks. 1374 } 1375 *finalizable = resolved_class->IsFinalizable(); 1376 const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(referrer_idx); 1377 bool is_accessible = resolved_class->IsPublic(); // Public classes are always accessible. 1378 if (!is_accessible) { 1379 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 1380 if (referrer_class == nullptr) { 1381 stats_->TypeNeedsAccessCheck(); 1382 return false; // Incomplete referrer knowledge needs access check. 1383 } 1384 // Perform access and instantiable checks, will return true if access is ok or false if we're 1385 // going to have to check this at runtime (for example for class loaders). 1386 is_accessible = referrer_class->CanAccess(resolved_class); 1387 } 1388 bool result = is_accessible && resolved_class->IsInstantiable(); 1389 if (result) { 1390 stats_->TypeDoesntNeedAccessCheck(); 1391 } else { 1392 stats_->TypeNeedsAccessCheck(); 1393 } 1394 return result; 1395} 1396 1397bool CompilerDriver::CanEmbedTypeInCode(const DexFile& dex_file, uint32_t type_idx, 1398 bool* is_type_initialized, bool* use_direct_type_ptr, 1399 uintptr_t* direct_type_ptr, bool* out_is_finalizable) { 1400 ScopedObjectAccess soa(Thread::Current()); 1401 Runtime* runtime = Runtime::Current(); 1402 mirror::DexCache* dex_cache = runtime->GetClassLinker()->FindDexCache( 1403 soa.Self(), dex_file, false); 1404 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 1405 if (resolved_class == nullptr) { 1406 return false; 1407 } 1408 if (GetCompilerOptions().GetCompilePic()) { 1409 // Do not allow a direct class pointer to be used when compiling for position-independent 1410 return false; 1411 } 1412 *out_is_finalizable = resolved_class->IsFinalizable(); 1413 gc::Heap* heap = runtime->GetHeap(); 1414 const bool compiling_boot = heap->IsCompilingBoot(); 1415 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 1416 if (compiling_boot) { 1417 // boot -> boot class pointers. 1418 // True if the class is in the image at boot compiling time. 1419 const bool is_image_class = IsBootImage() && IsImageClass( 1420 dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_)); 1421 // True if pc relative load works. 1422 if (is_image_class && support_boot_image_fixup) { 1423 *is_type_initialized = resolved_class->IsInitialized(); 1424 *use_direct_type_ptr = false; 1425 *direct_type_ptr = 0; 1426 return true; 1427 } else { 1428 return false; 1429 } 1430 } else if (runtime->UseJitCompilation() && !heap->IsMovableObject(resolved_class)) { 1431 *is_type_initialized = resolved_class->IsInitialized(); 1432 // If the class may move around, then don't embed it as a direct pointer. 1433 *use_direct_type_ptr = true; 1434 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 1435 return true; 1436 } else { 1437 // True if the class is in the image at app compiling time. 1438 const bool class_in_image = heap->FindSpaceFromObject(resolved_class, false)->IsImageSpace(); 1439 if (class_in_image && support_boot_image_fixup) { 1440 // boot -> app class pointers. 1441 *is_type_initialized = resolved_class->IsInitialized(); 1442 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1443 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 1444 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 1445 return true; 1446 } else { 1447 // app -> app class pointers. 1448 // Give up because app does not have an image and class 1449 // isn't created at compile time. TODO: implement this 1450 // if/when each app gets an image. 1451 return false; 1452 } 1453 } 1454} 1455 1456bool CompilerDriver::CanEmbedReferenceTypeInCode(ClassReference* ref, 1457 bool* use_direct_ptr, 1458 uintptr_t* direct_type_ptr) { 1459 CHECK(ref != nullptr); 1460 CHECK(use_direct_ptr != nullptr); 1461 CHECK(direct_type_ptr != nullptr); 1462 1463 ScopedObjectAccess soa(Thread::Current()); 1464 mirror::Class* reference_class = mirror::Reference::GetJavaLangRefReference(); 1465 bool is_initialized = false; 1466 bool unused_finalizable; 1467 // Make sure we have a finished Reference class object before attempting to use it. 1468 if (!CanEmbedTypeInCode(*reference_class->GetDexCache()->GetDexFile(), 1469 reference_class->GetDexTypeIndex(), &is_initialized, 1470 use_direct_ptr, direct_type_ptr, &unused_finalizable) || 1471 !is_initialized) { 1472 return false; 1473 } 1474 ref->first = &reference_class->GetDexFile(); 1475 ref->second = reference_class->GetDexClassDefIndex(); 1476 return true; 1477} 1478 1479uint32_t CompilerDriver::GetReferenceSlowFlagOffset() const { 1480 ScopedObjectAccess soa(Thread::Current()); 1481 mirror::Class* klass = mirror::Reference::GetJavaLangRefReference(); 1482 DCHECK(klass->IsInitialized()); 1483 return klass->GetSlowPathFlagOffset().Uint32Value(); 1484} 1485 1486uint32_t CompilerDriver::GetReferenceDisableFlagOffset() const { 1487 ScopedObjectAccess soa(Thread::Current()); 1488 mirror::Class* klass = mirror::Reference::GetJavaLangRefReference(); 1489 DCHECK(klass->IsInitialized()); 1490 return klass->GetDisableIntrinsicFlagOffset().Uint32Value(); 1491} 1492 1493DexCacheArraysLayout CompilerDriver::GetDexCacheArraysLayout(const DexFile* dex_file) { 1494 return ContainsElement(GetDexFilesForOatFile(), dex_file) 1495 ? DexCacheArraysLayout(GetInstructionSetPointerSize(instruction_set_), dex_file) 1496 : DexCacheArraysLayout(); 1497} 1498 1499void CompilerDriver::ProcessedInstanceField(bool resolved) { 1500 if (!resolved) { 1501 stats_->UnresolvedInstanceField(); 1502 } else { 1503 stats_->ResolvedInstanceField(); 1504 } 1505} 1506 1507void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1508 if (!resolved) { 1509 stats_->UnresolvedStaticField(); 1510 } else if (local) { 1511 stats_->ResolvedLocalStaticField(); 1512 } else { 1513 stats_->ResolvedStaticField(); 1514 } 1515} 1516 1517void CompilerDriver::ProcessedInvoke(InvokeType invoke_type, int flags) { 1518 stats_->ProcessedInvoke(invoke_type, flags); 1519} 1520 1521ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1522 const DexCompilationUnit* mUnit, bool is_put, 1523 const ScopedObjectAccess& soa) { 1524 // Try to resolve the field and compiling method's class. 1525 ArtField* resolved_field; 1526 mirror::Class* referrer_class; 1527 Handle<mirror::DexCache> dex_cache(mUnit->GetDexCache()); 1528 { 1529 StackHandleScope<1> hs(soa.Self()); 1530 Handle<mirror::ClassLoader> class_loader_handle( 1531 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1532 resolved_field = ResolveField(soa, dex_cache, class_loader_handle, mUnit, field_idx, false); 1533 referrer_class = resolved_field != nullptr 1534 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader_handle, mUnit) : nullptr; 1535 } 1536 bool can_link = false; 1537 if (resolved_field != nullptr && referrer_class != nullptr) { 1538 std::pair<bool, bool> fast_path = IsFastInstanceField( 1539 dex_cache.Get(), referrer_class, resolved_field, field_idx); 1540 can_link = is_put ? fast_path.second : fast_path.first; 1541 } 1542 ProcessedInstanceField(can_link); 1543 return can_link ? resolved_field : nullptr; 1544} 1545 1546bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1547 bool is_put, MemberOffset* field_offset, 1548 bool* is_volatile) { 1549 ScopedObjectAccess soa(Thread::Current()); 1550 ArtField* resolved_field = ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa); 1551 1552 if (resolved_field == nullptr) { 1553 // Conservative defaults. 1554 *is_volatile = true; 1555 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1556 return false; 1557 } else { 1558 *is_volatile = resolved_field->IsVolatile(); 1559 *field_offset = resolved_field->GetOffset(); 1560 return true; 1561 } 1562} 1563 1564void CompilerDriver::GetCodeAndMethodForDirectCall(InvokeType* type, InvokeType sharp_type, 1565 bool no_guarantee_of_dex_cache_entry, 1566 const mirror::Class* referrer_class, 1567 ArtMethod* method, 1568 int* stats_flags, 1569 MethodReference* target_method, 1570 uintptr_t* direct_code, 1571 uintptr_t* direct_method) { 1572 // For direct and static methods compute possible direct_code and direct_method values, ie 1573 // an address for the Method* being invoked and an address of the code for that Method*. 1574 // For interface calls compute a value for direct_method that is the interface method being 1575 // invoked, so this can be passed to the out-of-line runtime support code. 1576 *direct_code = 0; 1577 *direct_method = 0; 1578 Runtime* const runtime = Runtime::Current(); 1579 gc::Heap* const heap = runtime->GetHeap(); 1580 auto* cl = runtime->GetClassLinker(); 1581 const auto pointer_size = cl->GetImagePointerSize(); 1582 bool use_dex_cache = GetCompilerOptions().GetCompilePic(); // Off by default 1583 const bool compiling_boot = heap->IsCompilingBoot(); 1584 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1585 const bool force_relocations = (compiling_boot || 1586 GetCompilerOptions().GetIncludePatchInformation()); 1587 if (sharp_type != kStatic && sharp_type != kDirect) { 1588 return; 1589 } 1590 // TODO: support patching on all architectures. 1591 use_dex_cache = use_dex_cache || (force_relocations && !support_boot_image_fixup_); 1592 mirror::Class* declaring_class = method->GetDeclaringClass(); 1593 bool method_code_in_boot = declaring_class->GetClassLoader() == nullptr; 1594 if (!use_dex_cache) { 1595 if (!method_code_in_boot) { 1596 use_dex_cache = true; 1597 } else { 1598 bool has_clinit_trampoline = 1599 method->IsStatic() && !declaring_class->IsInitialized(); 1600 if (has_clinit_trampoline && declaring_class != referrer_class) { 1601 // Ensure we run the clinit trampoline unless we are invoking a static method in the same 1602 // class. 1603 use_dex_cache = true; 1604 } 1605 } 1606 } 1607 if (runtime->UseJitCompilation()) { 1608 // If we are the JIT, then don't allow a direct call to the interpreter bridge since this will 1609 // never be updated even after we compile the method. 1610 if (cl->IsQuickToInterpreterBridge( 1611 reinterpret_cast<const void*>(compiler_->GetEntryPointOf(method)))) { 1612 use_dex_cache = true; 1613 } 1614 } 1615 if (method_code_in_boot) { 1616 *stats_flags |= kFlagDirectCallToBoot | kFlagDirectMethodToBoot; 1617 } 1618 if (!use_dex_cache && force_relocations) { 1619 bool is_in_image; 1620 if (IsBootImage()) { 1621 is_in_image = IsImageClass(method->GetDeclaringClassDescriptor()); 1622 } else { 1623 is_in_image = instruction_set_ != kX86 && instruction_set_ != kX86_64 && 1624 heap->FindSpaceFromObject(method->GetDeclaringClass(), false)->IsImageSpace() && 1625 !cl->IsQuickToInterpreterBridge( 1626 reinterpret_cast<const void*>(compiler_->GetEntryPointOf(method))); 1627 } 1628 if (!is_in_image) { 1629 // We can only branch directly to Methods that are resolved in the DexCache. 1630 // Otherwise we won't invoke the resolution trampoline. 1631 use_dex_cache = true; 1632 } 1633 } 1634 // The method is defined not within this dex file. We need a dex cache slot within the current 1635 // dex file or direct pointers. 1636 bool must_use_direct_pointers = false; 1637 mirror::DexCache* dex_cache = declaring_class->GetDexCache(); 1638 if (target_method->dex_file == dex_cache->GetDexFile() && 1639 !(runtime->UseJitCompilation() && dex_cache->GetResolvedMethod( 1640 method->GetDexMethodIndex(), pointer_size) == nullptr)) { 1641 target_method->dex_method_index = method->GetDexMethodIndex(); 1642 } else { 1643 if (no_guarantee_of_dex_cache_entry) { 1644 // See if the method is also declared in this dex cache. 1645 uint32_t dex_method_idx = method->FindDexMethodIndexInOtherDexFile( 1646 *target_method->dex_file, target_method->dex_method_index); 1647 if (dex_method_idx != DexFile::kDexNoIndex) { 1648 target_method->dex_method_index = dex_method_idx; 1649 } else { 1650 if (force_relocations && !use_dex_cache) { 1651 target_method->dex_method_index = method->GetDexMethodIndex(); 1652 target_method->dex_file = dex_cache->GetDexFile(); 1653 } 1654 must_use_direct_pointers = true; 1655 } 1656 } 1657 } 1658 if (use_dex_cache) { 1659 if (must_use_direct_pointers) { 1660 // Fail. Test above showed the only safe dispatch was via the dex cache, however, the direct 1661 // pointers are required as the dex cache lacks an appropriate entry. 1662 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1663 } else { 1664 *type = sharp_type; 1665 } 1666 } else { 1667 bool method_in_image = false; 1668 const std::vector<gc::space::ImageSpace*> image_spaces = heap->GetBootImageSpaces(); 1669 for (gc::space::ImageSpace* image_space : image_spaces) { 1670 const auto& method_section = image_space->GetImageHeader().GetMethodsSection(); 1671 if (method_section.Contains(reinterpret_cast<uint8_t*>(method) - image_space->Begin())) { 1672 method_in_image = true; 1673 break; 1674 } 1675 } 1676 if (method_in_image || compiling_boot || runtime->UseJitCompilation()) { 1677 // We know we must be able to get to the method in the image, so use that pointer. 1678 // In the case where we are the JIT, we can always use direct pointers since we know where 1679 // the method and its code are / will be. We don't sharpen to interpreter bridge since we 1680 // check IsQuickToInterpreterBridge above. 1681 CHECK(!method->IsAbstract()); 1682 *type = sharp_type; 1683 *direct_method = force_relocations ? -1 : reinterpret_cast<uintptr_t>(method); 1684 *direct_code = force_relocations ? -1 : compiler_->GetEntryPointOf(method); 1685 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1686 target_method->dex_method_index = method->GetDexMethodIndex(); 1687 } else if (!must_use_direct_pointers) { 1688 // Set the code and rely on the dex cache for the method. 1689 *type = sharp_type; 1690 if (force_relocations) { 1691 *direct_code = -1; 1692 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1693 target_method->dex_method_index = method->GetDexMethodIndex(); 1694 } else { 1695 *direct_code = compiler_->GetEntryPointOf(method); 1696 } 1697 } else { 1698 // Direct pointers were required but none were available. 1699 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1700 } 1701 } 1702} 1703 1704bool CompilerDriver::ComputeInvokeInfo(const DexCompilationUnit* mUnit, const uint32_t dex_pc, 1705 bool update_stats, bool enable_devirtualization, 1706 InvokeType* invoke_type, MethodReference* target_method, 1707 int* vtable_idx, uintptr_t* direct_code, 1708 uintptr_t* direct_method) { 1709 InvokeType orig_invoke_type = *invoke_type; 1710 int stats_flags = 0; 1711 ScopedObjectAccess soa(Thread::Current()); 1712 // Try to resolve the method and compiling method's class. 1713 StackHandleScope<2> hs(soa.Self()); 1714 Handle<mirror::DexCache> dex_cache(mUnit->GetDexCache()); 1715 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 1716 soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1717 uint32_t method_idx = target_method->dex_method_index; 1718 ArtMethod* resolved_method = ResolveMethod( 1719 soa, dex_cache, class_loader, mUnit, method_idx, orig_invoke_type); 1720 auto h_referrer_class = hs.NewHandle(resolved_method != nullptr ? 1721 ResolveCompilingMethodsClass(soa, dex_cache, class_loader, mUnit) : nullptr); 1722 bool result = false; 1723 if (resolved_method != nullptr) { 1724 *vtable_idx = GetResolvedMethodVTableIndex(resolved_method, orig_invoke_type); 1725 1726 if (enable_devirtualization && mUnit->GetVerifiedMethod() != nullptr) { 1727 const MethodReference* devirt_target = mUnit->GetVerifiedMethod()->GetDevirtTarget(dex_pc); 1728 1729 stats_flags = IsFastInvoke( 1730 soa, dex_cache, class_loader, mUnit, h_referrer_class.Get(), resolved_method, 1731 invoke_type, target_method, devirt_target, direct_code, direct_method); 1732 result = stats_flags != 0; 1733 } else { 1734 // Devirtualization not enabled. Inline IsFastInvoke(), dropping the devirtualization parts. 1735 if (UNLIKELY(h_referrer_class.Get() == nullptr) || 1736 UNLIKELY(!h_referrer_class->CanAccessResolvedMethod(resolved_method->GetDeclaringClass(), 1737 resolved_method, dex_cache.Get(), 1738 target_method->dex_method_index)) || 1739 *invoke_type == kSuper) { 1740 // Slow path. (Without devirtualization, all super calls go slow path as well.) 1741 } else { 1742 // Sharpening failed so generate a regular resolved method dispatch. 1743 stats_flags = kFlagMethodResolved; 1744 GetCodeAndMethodForDirectCall( 1745 invoke_type, *invoke_type, false, h_referrer_class.Get(), resolved_method, &stats_flags, 1746 target_method, direct_code, direct_method); 1747 result = true; 1748 } 1749 } 1750 } 1751 if (!result) { 1752 // Conservative defaults. 1753 *vtable_idx = -1; 1754 *direct_code = 0u; 1755 *direct_method = 0u; 1756 } 1757 if (update_stats) { 1758 ProcessedInvoke(orig_invoke_type, stats_flags); 1759 } 1760 return result; 1761} 1762 1763const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1764 uint32_t method_idx) const { 1765 MethodReference ref(dex_file, method_idx); 1766 return verification_results_->GetVerifiedMethod(ref); 1767} 1768 1769bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1770 if (!compiler_options_->IsVerificationEnabled()) { 1771 // If we didn't verify, every cast has to be treated as non-safe. 1772 return false; 1773 } 1774 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1775 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1776 if (result) { 1777 stats_->SafeCast(); 1778 } else { 1779 stats_->NotASafeCast(); 1780 } 1781 return result; 1782} 1783 1784class CompilationVisitor { 1785 public: 1786 virtual ~CompilationVisitor() {} 1787 virtual void Visit(size_t index) = 0; 1788}; 1789 1790class ParallelCompilationManager { 1791 public: 1792 ParallelCompilationManager(ClassLinker* class_linker, 1793 jobject class_loader, 1794 CompilerDriver* compiler, 1795 const DexFile* dex_file, 1796 const std::vector<const DexFile*>& dex_files, 1797 ThreadPool* thread_pool) 1798 : index_(0), 1799 class_linker_(class_linker), 1800 class_loader_(class_loader), 1801 compiler_(compiler), 1802 dex_file_(dex_file), 1803 dex_files_(dex_files), 1804 thread_pool_(thread_pool) {} 1805 1806 ClassLinker* GetClassLinker() const { 1807 CHECK(class_linker_ != nullptr); 1808 return class_linker_; 1809 } 1810 1811 jobject GetClassLoader() const { 1812 return class_loader_; 1813 } 1814 1815 CompilerDriver* GetCompiler() const { 1816 CHECK(compiler_ != nullptr); 1817 return compiler_; 1818 } 1819 1820 const DexFile* GetDexFile() const { 1821 CHECK(dex_file_ != nullptr); 1822 return dex_file_; 1823 } 1824 1825 const std::vector<const DexFile*>& GetDexFiles() const { 1826 return dex_files_; 1827 } 1828 1829 void ForAll(size_t begin, size_t end, CompilationVisitor* visitor, size_t work_units) 1830 REQUIRES(!*Locks::mutator_lock_) { 1831 Thread* self = Thread::Current(); 1832 self->AssertNoPendingException(); 1833 CHECK_GT(work_units, 0U); 1834 1835 index_.StoreRelaxed(begin); 1836 for (size_t i = 0; i < work_units; ++i) { 1837 thread_pool_->AddTask(self, new ForAllClosure(this, end, visitor)); 1838 } 1839 thread_pool_->StartWorkers(self); 1840 1841 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1842 // thread destructor's called below perform join). 1843 CHECK_NE(self->GetState(), kRunnable); 1844 1845 // Wait for all the worker threads to finish. 1846 thread_pool_->Wait(self, true, false); 1847 1848 // And stop the workers accepting jobs. 1849 thread_pool_->StopWorkers(self); 1850 } 1851 1852 size_t NextIndex() { 1853 return index_.FetchAndAddSequentiallyConsistent(1); 1854 } 1855 1856 private: 1857 class ForAllClosure : public Task { 1858 public: 1859 ForAllClosure(ParallelCompilationManager* manager, size_t end, CompilationVisitor* visitor) 1860 : manager_(manager), 1861 end_(end), 1862 visitor_(visitor) {} 1863 1864 virtual void Run(Thread* self) { 1865 while (true) { 1866 const size_t index = manager_->NextIndex(); 1867 if (UNLIKELY(index >= end_)) { 1868 break; 1869 } 1870 visitor_->Visit(index); 1871 self->AssertNoPendingException(); 1872 } 1873 } 1874 1875 virtual void Finalize() { 1876 delete this; 1877 } 1878 1879 private: 1880 ParallelCompilationManager* const manager_; 1881 const size_t end_; 1882 CompilationVisitor* const visitor_; 1883 }; 1884 1885 AtomicInteger index_; 1886 ClassLinker* const class_linker_; 1887 const jobject class_loader_; 1888 CompilerDriver* const compiler_; 1889 const DexFile* const dex_file_; 1890 const std::vector<const DexFile*>& dex_files_; 1891 ThreadPool* const thread_pool_; 1892 1893 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1894}; 1895 1896// A fast version of SkipClass above if the class pointer is available 1897// that avoids the expensive FindInClassPath search. 1898static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1899 SHARED_REQUIRES(Locks::mutator_lock_) { 1900 DCHECK(klass != nullptr); 1901 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1902 if (&dex_file != &original_dex_file) { 1903 if (class_loader == nullptr) { 1904 LOG(WARNING) << "Skipping class " << PrettyDescriptor(klass) << " from " 1905 << dex_file.GetLocation() << " previously found in " 1906 << original_dex_file.GetLocation(); 1907 } 1908 return true; 1909 } 1910 return false; 1911} 1912 1913static void CheckAndClearResolveException(Thread* self) 1914 SHARED_REQUIRES(Locks::mutator_lock_) { 1915 CHECK(self->IsExceptionPending()); 1916 mirror::Throwable* exception = self->GetException(); 1917 std::string temp; 1918 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1919 const char* expected_exceptions[] = { 1920 "Ljava/lang/IllegalAccessError;", 1921 "Ljava/lang/IncompatibleClassChangeError;", 1922 "Ljava/lang/InstantiationError;", 1923 "Ljava/lang/LinkageError;", 1924 "Ljava/lang/NoClassDefFoundError;", 1925 "Ljava/lang/NoSuchFieldError;", 1926 "Ljava/lang/NoSuchMethodError;" 1927 }; 1928 bool found = false; 1929 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1930 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1931 found = true; 1932 } 1933 } 1934 if (!found) { 1935 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1936 } 1937 self->ClearException(); 1938} 1939 1940bool CompilerDriver::RequiresConstructorBarrier(const DexFile& dex_file, 1941 uint16_t class_def_idx) const { 1942 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx); 1943 const uint8_t* class_data = dex_file.GetClassData(class_def); 1944 if (class_data == nullptr) { 1945 // Empty class such as a marker interface. 1946 return false; 1947 } 1948 ClassDataItemIterator it(dex_file, class_data); 1949 while (it.HasNextStaticField()) { 1950 it.Next(); 1951 } 1952 // We require a constructor barrier if there are final instance fields. 1953 while (it.HasNextInstanceField()) { 1954 if (it.MemberIsFinal()) { 1955 return true; 1956 } 1957 it.Next(); 1958 } 1959 return false; 1960} 1961 1962class ResolveClassFieldsAndMethodsVisitor : public CompilationVisitor { 1963 public: 1964 explicit ResolveClassFieldsAndMethodsVisitor(const ParallelCompilationManager* manager) 1965 : manager_(manager) {} 1966 1967 void Visit(size_t class_def_index) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 1968 ATRACE_CALL(); 1969 Thread* const self = Thread::Current(); 1970 jobject jclass_loader = manager_->GetClassLoader(); 1971 const DexFile& dex_file = *manager_->GetDexFile(); 1972 ClassLinker* class_linker = manager_->GetClassLinker(); 1973 1974 // If an instance field is final then we need to have a barrier on the return, static final 1975 // fields are assigned within the lock held for class initialization. Conservatively assume 1976 // constructor barriers are always required. 1977 bool requires_constructor_barrier = true; 1978 1979 // Method and Field are the worst. We can't resolve without either 1980 // context from the code use (to disambiguate virtual vs direct 1981 // method and instance vs static field) or from class 1982 // definitions. While the compiler will resolve what it can as it 1983 // needs it, here we try to resolve fields and methods used in class 1984 // definitions, since many of them many never be referenced by 1985 // generated code. 1986 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1987 ScopedObjectAccess soa(self); 1988 StackHandleScope<2> hs(soa.Self()); 1989 Handle<mirror::ClassLoader> class_loader( 1990 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1991 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 1992 soa.Self(), dex_file, false))); 1993 // Resolve the class. 1994 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1995 class_loader); 1996 bool resolve_fields_and_methods; 1997 if (klass == nullptr) { 1998 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1999 // attempt to resolve methods and fields when there is no declaring class. 2000 CheckAndClearResolveException(soa.Self()); 2001 resolve_fields_and_methods = false; 2002 } else { 2003 // We successfully resolved a class, should we skip it? 2004 if (SkipClass(jclass_loader, dex_file, klass)) { 2005 return; 2006 } 2007 // We want to resolve the methods and fields eagerly. 2008 resolve_fields_and_methods = true; 2009 } 2010 // Note the class_data pointer advances through the headers, 2011 // static fields, instance fields, direct methods, and virtual 2012 // methods. 2013 const uint8_t* class_data = dex_file.GetClassData(class_def); 2014 if (class_data == nullptr) { 2015 // Empty class such as a marker interface. 2016 requires_constructor_barrier = false; 2017 } else { 2018 ClassDataItemIterator it(dex_file, class_data); 2019 while (it.HasNextStaticField()) { 2020 if (resolve_fields_and_methods) { 2021 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 2022 dex_cache, class_loader, true); 2023 if (field == nullptr) { 2024 CheckAndClearResolveException(soa.Self()); 2025 } 2026 } 2027 it.Next(); 2028 } 2029 // We require a constructor barrier if there are final instance fields. 2030 requires_constructor_barrier = false; 2031 while (it.HasNextInstanceField()) { 2032 if (it.MemberIsFinal()) { 2033 requires_constructor_barrier = true; 2034 } 2035 if (resolve_fields_and_methods) { 2036 ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 2037 dex_cache, class_loader, false); 2038 if (field == nullptr) { 2039 CheckAndClearResolveException(soa.Self()); 2040 } 2041 } 2042 it.Next(); 2043 } 2044 if (resolve_fields_and_methods) { 2045 while (it.HasNextDirectMethod()) { 2046 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 2047 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 2048 it.GetMethodInvokeType(class_def)); 2049 if (method == nullptr) { 2050 CheckAndClearResolveException(soa.Self()); 2051 } 2052 it.Next(); 2053 } 2054 while (it.HasNextVirtualMethod()) { 2055 ArtMethod* method = class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( 2056 dex_file, it.GetMemberIndex(), dex_cache, class_loader, nullptr, 2057 it.GetMethodInvokeType(class_def)); 2058 if (method == nullptr) { 2059 CheckAndClearResolveException(soa.Self()); 2060 } 2061 it.Next(); 2062 } 2063 DCHECK(!it.HasNext()); 2064 } 2065 } 2066 manager_->GetCompiler()->SetRequiresConstructorBarrier(self, 2067 &dex_file, 2068 class_def_index, 2069 requires_constructor_barrier); 2070 } 2071 2072 private: 2073 const ParallelCompilationManager* const manager_; 2074}; 2075 2076class ResolveTypeVisitor : public CompilationVisitor { 2077 public: 2078 explicit ResolveTypeVisitor(const ParallelCompilationManager* manager) : manager_(manager) { 2079 } 2080 virtual void Visit(size_t type_idx) OVERRIDE REQUIRES(!Locks::mutator_lock_) { 2081 // Class derived values are more complicated, they require the linker and loader. 2082 ScopedObjectAccess soa(Thread::Current()); 2083 ClassLinker* class_linker = manager_->GetClassLinker(); 2084 const DexFile& dex_file = *manager_->GetDexFile(); 2085 StackHandleScope<2> hs(soa.Self()); 2086 Handle<mirror::ClassLoader> class_loader( 2087 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(manager_->GetClassLoader()))); 2088 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->RegisterDexFile( 2089 dex_file, 2090 class_linker->GetOrCreateAllocatorForClassLoader(class_loader.Get())))); 2091 mirror::Class* klass = class_linker->ResolveType(dex_file, type_idx, dex_cache, class_loader); 2092 2093 if (klass == nullptr) { 2094 soa.Self()->AssertPendingException(); 2095 mirror::Throwable* exception = soa.Self()->GetException(); 2096 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 2097 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 2098 // There's little point continuing compilation if the heap is exhausted. 2099 LOG(FATAL) << "Out of memory during type resolution for compilation"; 2100 } 2101 soa.Self()->ClearException(); 2102 } 2103 } 2104 2105 private: 2106 const ParallelCompilationManager* const manager_; 2107}; 2108 2109void CompilerDriver::ResolveDexFile(jobject class_loader, 2110 const DexFile& dex_file, 2111 const std::vector<const DexFile*>& dex_files, 2112 ThreadPool* thread_pool, 2113 size_t thread_count, 2114 TimingLogger* timings) { 2115 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2116 2117 // TODO: we could resolve strings here, although the string table is largely filled with class 2118 // and method names. 2119 2120 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2121 thread_pool); 2122 if (IsBootImage()) { 2123 // For images we resolve all types, such as array, whereas for applications just those with 2124 // classdefs are resolved by ResolveClassFieldsAndMethods. 2125 TimingLogger::ScopedTiming t("Resolve Types", timings); 2126 ResolveTypeVisitor visitor(&context); 2127 context.ForAll(0, dex_file.NumTypeIds(), &visitor, thread_count); 2128 } 2129 2130 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 2131 ResolveClassFieldsAndMethodsVisitor visitor(&context); 2132 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2133} 2134 2135void CompilerDriver::SetVerified(jobject class_loader, 2136 const std::vector<const DexFile*>& dex_files, 2137 TimingLogger* timings) { 2138 // This can be run in parallel. 2139 for (const DexFile* dex_file : dex_files) { 2140 CHECK(dex_file != nullptr); 2141 SetVerifiedDexFile(class_loader, 2142 *dex_file, 2143 dex_files, 2144 parallel_thread_pool_.get(), 2145 parallel_thread_count_, 2146 timings); 2147 } 2148} 2149 2150void CompilerDriver::Verify(jobject class_loader, 2151 const std::vector<const DexFile*>& dex_files, 2152 TimingLogger* timings) { 2153 // Note: verification should not be pulling in classes anymore when compiling the boot image, 2154 // as all should have been resolved before. As such, doing this in parallel should still 2155 // be deterministic. 2156 for (const DexFile* dex_file : dex_files) { 2157 CHECK(dex_file != nullptr); 2158 VerifyDexFile(class_loader, 2159 *dex_file, 2160 dex_files, 2161 parallel_thread_pool_.get(), 2162 parallel_thread_count_, 2163 timings); 2164 } 2165} 2166 2167class VerifyClassVisitor : public CompilationVisitor { 2168 public: 2169 VerifyClassVisitor(const ParallelCompilationManager* manager, LogSeverity log_level) 2170 : manager_(manager), log_level_(log_level) {} 2171 2172 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2173 ATRACE_CALL(); 2174 ScopedObjectAccess soa(Thread::Current()); 2175 const DexFile& dex_file = *manager_->GetDexFile(); 2176 if (!manager_->GetCompiler()->ShouldVerifyClassBasedOnProfile(dex_file, class_def_index)) { 2177 // Skip verification since the class is not in the profile. 2178 return; 2179 } 2180 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2181 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2182 ClassLinker* class_linker = manager_->GetClassLinker(); 2183 jobject jclass_loader = manager_->GetClassLoader(); 2184 StackHandleScope<3> hs(soa.Self()); 2185 Handle<mirror::ClassLoader> class_loader( 2186 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2187 Handle<mirror::Class> klass( 2188 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2189 if (klass.Get() == nullptr) { 2190 CHECK(soa.Self()->IsExceptionPending()); 2191 soa.Self()->ClearException(); 2192 2193 /* 2194 * At compile time, we can still structurally verify the class even if FindClass fails. 2195 * This is to ensure the class is structurally sound for compilation. An unsound class 2196 * will be rejected by the verifier and later skipped during compilation in the compiler. 2197 */ 2198 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache( 2199 soa.Self(), dex_file, false))); 2200 std::string error_msg; 2201 if (verifier::MethodVerifier::VerifyClass(soa.Self(), 2202 &dex_file, 2203 dex_cache, 2204 class_loader, 2205 &class_def, 2206 Runtime::Current()->GetCompilerCallbacks(), 2207 true /* allow soft failures */, 2208 log_level_, 2209 &error_msg) == 2210 verifier::MethodVerifier::kHardFailure) { 2211 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 2212 << " because: " << error_msg; 2213 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2214 } 2215 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 2216 CHECK(klass->IsResolved()) << PrettyClass(klass.Get()); 2217 class_linker->VerifyClass(soa.Self(), klass, log_level_); 2218 2219 if (klass->IsErroneous()) { 2220 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 2221 CHECK(soa.Self()->IsExceptionPending()); 2222 soa.Self()->ClearException(); 2223 manager_->GetCompiler()->SetHadHardVerifierFailure(); 2224 } 2225 2226 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 2227 << PrettyDescriptor(klass.Get()) << ": state=" << klass->GetStatus(); 2228 2229 // It is *very* problematic if there are verification errors in the boot classpath. For example, 2230 // we rely on things working OK without verification when the decryption dialog is brought up. 2231 // So abort in a debug build if we find this violated. 2232 DCHECK(!manager_->GetCompiler()->IsBootImage() || klass->IsVerified()) 2233 << "Boot classpath class " << PrettyClass(klass.Get()) << " failed to fully verify."; 2234 } 2235 soa.Self()->AssertNoPendingException(); 2236 } 2237 2238 private: 2239 const ParallelCompilationManager* const manager_; 2240 const LogSeverity log_level_; 2241}; 2242 2243void CompilerDriver::VerifyDexFile(jobject class_loader, 2244 const DexFile& dex_file, 2245 const std::vector<const DexFile*>& dex_files, 2246 ThreadPool* thread_pool, 2247 size_t thread_count, 2248 TimingLogger* timings) { 2249 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2250 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2251 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2252 thread_pool); 2253 LogSeverity log_level = GetCompilerOptions().AbortOnHardVerifierFailure() 2254 ? LogSeverity::INTERNAL_FATAL 2255 : LogSeverity::WARNING; 2256 VerifyClassVisitor visitor(&context, log_level); 2257 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2258} 2259 2260class SetVerifiedClassVisitor : public CompilationVisitor { 2261 public: 2262 explicit SetVerifiedClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2263 2264 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2265 ATRACE_CALL(); 2266 ScopedObjectAccess soa(Thread::Current()); 2267 const DexFile& dex_file = *manager_->GetDexFile(); 2268 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2269 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2270 ClassLinker* class_linker = manager_->GetClassLinker(); 2271 jobject jclass_loader = manager_->GetClassLoader(); 2272 StackHandleScope<3> hs(soa.Self()); 2273 Handle<mirror::ClassLoader> class_loader( 2274 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2275 Handle<mirror::Class> klass( 2276 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2277 // Class might have failed resolution. Then don't set it to verified. 2278 if (klass.Get() != nullptr) { 2279 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 2280 // very wrong. 2281 if (klass->IsResolved()) { 2282 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 2283 ObjectLock<mirror::Class> lock(soa.Self(), klass); 2284 // Set class status to verified. 2285 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, soa.Self()); 2286 // Mark methods as pre-verified. If we don't do this, the interpreter will run with 2287 // access checks. 2288 klass->SetSkipAccessChecksFlagOnAllMethods( 2289 GetInstructionSetPointerSize(manager_->GetCompiler()->GetInstructionSet())); 2290 klass->SetVerificationAttempted(); 2291 } 2292 // Record the final class status if necessary. 2293 ClassReference ref(manager_->GetDexFile(), class_def_index); 2294 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2295 } 2296 } else { 2297 Thread* self = soa.Self(); 2298 DCHECK(self->IsExceptionPending()); 2299 self->ClearException(); 2300 } 2301 } 2302 2303 private: 2304 const ParallelCompilationManager* const manager_; 2305}; 2306 2307void CompilerDriver::SetVerifiedDexFile(jobject class_loader, 2308 const DexFile& dex_file, 2309 const std::vector<const DexFile*>& dex_files, 2310 ThreadPool* thread_pool, 2311 size_t thread_count, 2312 TimingLogger* timings) { 2313 TimingLogger::ScopedTiming t("Verify Dex File", timings); 2314 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2315 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 2316 thread_pool); 2317 SetVerifiedClassVisitor visitor(&context); 2318 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2319} 2320 2321class InitializeClassVisitor : public CompilationVisitor { 2322 public: 2323 explicit InitializeClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2324 2325 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2326 ATRACE_CALL(); 2327 jobject jclass_loader = manager_->GetClassLoader(); 2328 const DexFile& dex_file = *manager_->GetDexFile(); 2329 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2330 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 2331 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 2332 2333 ScopedObjectAccess soa(Thread::Current()); 2334 StackHandleScope<3> hs(soa.Self()); 2335 Handle<mirror::ClassLoader> class_loader( 2336 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2337 Handle<mirror::Class> klass( 2338 hs.NewHandle(manager_->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 2339 2340 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 2341 // Only try to initialize classes that were successfully verified. 2342 if (klass->IsVerified()) { 2343 // Attempt to initialize the class but bail if we either need to initialize the super-class 2344 // or static fields. 2345 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, false); 2346 if (!klass->IsInitialized()) { 2347 // We don't want non-trivial class initialization occurring on multiple threads due to 2348 // deadlock problems. For example, a parent class is initialized (holding its lock) that 2349 // refers to a sub-class in its static/class initializer causing it to try to acquire the 2350 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 2351 // after first initializing its parents, whose locks are acquired. This leads to a 2352 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 2353 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 2354 // than use a special Object for the purpose we use the Class of java.lang.Class. 2355 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 2356 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 2357 // Attempt to initialize allowing initialization of parent classes but still not static 2358 // fields. 2359 manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, false, true); 2360 if (!klass->IsInitialized()) { 2361 // We need to initialize static fields, we only do this for image classes that aren't 2362 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 2363 bool can_init_static_fields = manager_->GetCompiler()->IsBootImage() && 2364 manager_->GetCompiler()->IsImageClass(descriptor) && 2365 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 2366 if (can_init_static_fields) { 2367 VLOG(compiler) << "Initializing: " << descriptor; 2368 // TODO multithreading support. We should ensure the current compilation thread has 2369 // exclusive access to the runtime and the transaction. To achieve this, we could use 2370 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 2371 // checks in Thread::AssertThreadSuspensionIsAllowable. 2372 Runtime* const runtime = Runtime::Current(); 2373 Transaction transaction; 2374 2375 // Run the class initializer in transaction mode. 2376 runtime->EnterTransactionMode(&transaction); 2377 const mirror::Class::Status old_status = klass->GetStatus(); 2378 bool success = manager_->GetClassLinker()->EnsureInitialized(soa.Self(), klass, true, 2379 true); 2380 // TODO we detach transaction from runtime to indicate we quit the transactional 2381 // mode which prevents the GC from visiting objects modified during the transaction. 2382 // Ensure GC is not run so don't access freed objects when aborting transaction. 2383 2384 ScopedAssertNoThreadSuspension ants(soa.Self(), "Transaction end"); 2385 runtime->ExitTransactionMode(); 2386 2387 if (!success) { 2388 CHECK(soa.Self()->IsExceptionPending()); 2389 mirror::Throwable* exception = soa.Self()->GetException(); 2390 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 2391 << exception->Dump(); 2392 std::ostream* file_log = manager_->GetCompiler()-> 2393 GetCompilerOptions().GetInitFailureOutput(); 2394 if (file_log != nullptr) { 2395 *file_log << descriptor << "\n"; 2396 *file_log << exception->Dump() << "\n"; 2397 } 2398 soa.Self()->ClearException(); 2399 transaction.Rollback(); 2400 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 2401 } 2402 } 2403 } 2404 soa.Self()->AssertNoPendingException(); 2405 } 2406 } 2407 // Record the final class status if necessary. 2408 ClassReference ref(manager_->GetDexFile(), class_def_index); 2409 manager_->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 2410 } 2411 // Clear any class not found or verification exceptions. 2412 soa.Self()->ClearException(); 2413 } 2414 2415 private: 2416 const ParallelCompilationManager* const manager_; 2417}; 2418 2419void CompilerDriver::InitializeClasses(jobject jni_class_loader, 2420 const DexFile& dex_file, 2421 const std::vector<const DexFile*>& dex_files, 2422 TimingLogger* timings) { 2423 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 2424 2425 // Initialization allocates objects and needs to run single-threaded to be deterministic. 2426 bool force_determinism = GetCompilerOptions().IsForceDeterminism(); 2427 ThreadPool* init_thread_pool = force_determinism 2428 ? single_thread_pool_.get() 2429 : parallel_thread_pool_.get(); 2430 size_t init_thread_count = force_determinism ? 1U : parallel_thread_count_; 2431 2432 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2433 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 2434 init_thread_pool); 2435 if (IsBootImage()) { 2436 // TODO: remove this when transactional mode supports multithreading. 2437 init_thread_count = 1U; 2438 } 2439 InitializeClassVisitor visitor(&context); 2440 context.ForAll(0, dex_file.NumClassDefs(), &visitor, init_thread_count); 2441} 2442 2443class InitializeArrayClassesAndCreateConflictTablesVisitor : public ClassVisitor { 2444 public: 2445 virtual bool operator()(mirror::Class* klass) OVERRIDE SHARED_REQUIRES(Locks::mutator_lock_) { 2446 if (klass->IsArrayClass()) { 2447 StackHandleScope<1> hs(Thread::Current()); 2448 Runtime::Current()->GetClassLinker()->EnsureInitialized(hs.Self(), 2449 hs.NewHandle(klass), 2450 true, 2451 true); 2452 } 2453 // Create the conflict tables. 2454 if (klass->ShouldHaveEmbeddedImtAndVTable()) { 2455 Runtime::Current()->GetClassLinker()->FillIMTAndConflictTables(klass); 2456 } 2457 return true; 2458 } 2459}; 2460 2461void CompilerDriver::InitializeClasses(jobject class_loader, 2462 const std::vector<const DexFile*>& dex_files, 2463 TimingLogger* timings) { 2464 for (size_t i = 0; i != dex_files.size(); ++i) { 2465 const DexFile* dex_file = dex_files[i]; 2466 CHECK(dex_file != nullptr); 2467 InitializeClasses(class_loader, *dex_file, dex_files, timings); 2468 } 2469 if (image_classes_ != nullptr) { 2470 // Make sure that we call EnsureIntiailized on all the array classes to call 2471 // SetVerificationAttempted so that the access flags are set. If we do not do this they get 2472 // changed at runtime resulting in more dirty image pages. 2473 // Also create conflict tables. 2474 // Only useful if we are compiling an image (image_classes_ is not null). 2475 ScopedObjectAccess soa(Thread::Current()); 2476 InitializeArrayClassesAndCreateConflictTablesVisitor visitor; 2477 Runtime::Current()->GetClassLinker()->VisitClassesWithoutClassesLock(&visitor); 2478 } 2479 if (IsBootImage()) { 2480 // Prune garbage objects created during aborted transactions. 2481 Runtime::Current()->GetHeap()->CollectGarbage(true); 2482 } 2483} 2484 2485void CompilerDriver::Compile(jobject class_loader, 2486 const std::vector<const DexFile*>& dex_files, 2487 TimingLogger* timings) { 2488 if (kDebugProfileGuidedCompilation) { 2489 LOG(INFO) << "[ProfileGuidedCompilation] " << 2490 ((profile_compilation_info_ == nullptr) 2491 ? "null" 2492 : profile_compilation_info_->DumpInfo(&dex_files)); 2493 } 2494 for (size_t i = 0; i != dex_files.size(); ++i) { 2495 const DexFile* dex_file = dex_files[i]; 2496 CHECK(dex_file != nullptr); 2497 CompileDexFile(class_loader, 2498 *dex_file, 2499 dex_files, 2500 parallel_thread_pool_.get(), 2501 parallel_thread_count_, 2502 timings); 2503 const ArenaPool* const arena_pool = Runtime::Current()->GetArenaPool(); 2504 const size_t arena_alloc = arena_pool->GetBytesAllocated(); 2505 max_arena_alloc_ = std::max(arena_alloc, max_arena_alloc_); 2506 Runtime::Current()->ReclaimArenaPoolMemory(); 2507 } 2508 VLOG(compiler) << "Compile: " << GetMemoryUsageString(false); 2509} 2510 2511class CompileClassVisitor : public CompilationVisitor { 2512 public: 2513 explicit CompileClassVisitor(const ParallelCompilationManager* manager) : manager_(manager) {} 2514 2515 virtual void Visit(size_t class_def_index) REQUIRES(!Locks::mutator_lock_) OVERRIDE { 2516 ATRACE_CALL(); 2517 const DexFile& dex_file = *manager_->GetDexFile(); 2518 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 2519 ClassLinker* class_linker = manager_->GetClassLinker(); 2520 jobject jclass_loader = manager_->GetClassLoader(); 2521 ClassReference ref(&dex_file, class_def_index); 2522 // Skip compiling classes with generic verifier failures since they will still fail at runtime 2523 if (manager_->GetCompiler()->verification_results_->IsClassRejected(ref)) { 2524 return; 2525 } 2526 // Use a scoped object access to perform to the quick SkipClass check. 2527 const char* descriptor = dex_file.GetClassDescriptor(class_def); 2528 ScopedObjectAccess soa(Thread::Current()); 2529 StackHandleScope<3> hs(soa.Self()); 2530 Handle<mirror::ClassLoader> class_loader( 2531 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2532 Handle<mirror::Class> klass( 2533 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 2534 Handle<mirror::DexCache> dex_cache; 2535 if (klass.Get() == nullptr) { 2536 soa.Self()->AssertPendingException(); 2537 soa.Self()->ClearException(); 2538 dex_cache = hs.NewHandle(class_linker->FindDexCache(soa.Self(), dex_file)); 2539 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 2540 return; 2541 } else { 2542 dex_cache = hs.NewHandle(klass->GetDexCache()); 2543 } 2544 2545 const uint8_t* class_data = dex_file.GetClassData(class_def); 2546 if (class_data == nullptr) { 2547 // empty class, probably a marker interface 2548 return; 2549 } 2550 2551 // Go to native so that we don't block GC during compilation. 2552 ScopedThreadSuspension sts(soa.Self(), kNative); 2553 2554 CompilerDriver* const driver = manager_->GetCompiler(); 2555 2556 // Can we run DEX-to-DEX compiler on this class ? 2557 optimizer::DexToDexCompilationLevel dex_to_dex_compilation_level = 2558 GetDexToDexCompilationLevel(soa.Self(), *driver, jclass_loader, dex_file, class_def); 2559 2560 ClassDataItemIterator it(dex_file, class_data); 2561 // Skip fields 2562 while (it.HasNextStaticField()) { 2563 it.Next(); 2564 } 2565 while (it.HasNextInstanceField()) { 2566 it.Next(); 2567 } 2568 2569 bool compilation_enabled = driver->IsClassToCompile( 2570 dex_file.StringByTypeIdx(class_def.class_idx_)); 2571 2572 // Compile direct methods 2573 int64_t previous_direct_method_idx = -1; 2574 while (it.HasNextDirectMethod()) { 2575 uint32_t method_idx = it.GetMemberIndex(); 2576 if (method_idx == previous_direct_method_idx) { 2577 // smali can create dex files with two encoded_methods sharing the same method_idx 2578 // http://code.google.com/p/smali/issues/detail?id=119 2579 it.Next(); 2580 continue; 2581 } 2582 previous_direct_method_idx = method_idx; 2583 CompileMethod(soa.Self(), driver, it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2584 it.GetMethodInvokeType(class_def), class_def_index, 2585 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2586 compilation_enabled, dex_cache); 2587 it.Next(); 2588 } 2589 // Compile virtual methods 2590 int64_t previous_virtual_method_idx = -1; 2591 while (it.HasNextVirtualMethod()) { 2592 uint32_t method_idx = it.GetMemberIndex(); 2593 if (method_idx == previous_virtual_method_idx) { 2594 // smali can create dex files with two encoded_methods sharing the same method_idx 2595 // http://code.google.com/p/smali/issues/detail?id=119 2596 it.Next(); 2597 continue; 2598 } 2599 previous_virtual_method_idx = method_idx; 2600 CompileMethod(soa.Self(), driver, it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2601 it.GetMethodInvokeType(class_def), class_def_index, 2602 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2603 compilation_enabled, dex_cache); 2604 it.Next(); 2605 } 2606 DCHECK(!it.HasNext()); 2607 } 2608 2609 private: 2610 const ParallelCompilationManager* const manager_; 2611}; 2612 2613void CompilerDriver::CompileDexFile(jobject class_loader, 2614 const DexFile& dex_file, 2615 const std::vector<const DexFile*>& dex_files, 2616 ThreadPool* thread_pool, 2617 size_t thread_count, 2618 TimingLogger* timings) { 2619 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2620 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2621 &dex_file, dex_files, thread_pool); 2622 CompileClassVisitor visitor(&context); 2623 context.ForAll(0, dex_file.NumClassDefs(), &visitor, thread_count); 2624} 2625 2626void CompilerDriver::AddCompiledMethod(const MethodReference& method_ref, 2627 CompiledMethod* const compiled_method, 2628 size_t non_relative_linker_patch_count) { 2629 DCHECK(GetCompiledMethod(method_ref) == nullptr) 2630 << PrettyMethod(method_ref.dex_method_index, *method_ref.dex_file); 2631 { 2632 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2633 compiled_methods_.Put(method_ref, compiled_method); 2634 non_relative_linker_patch_count_ += non_relative_linker_patch_count; 2635 } 2636 DCHECK(GetCompiledMethod(method_ref) != nullptr) 2637 << PrettyMethod(method_ref.dex_method_index, *method_ref.dex_file); 2638} 2639 2640void CompilerDriver::RemoveCompiledMethod(const MethodReference& method_ref) { 2641 CompiledMethod* compiled_method = nullptr; 2642 { 2643 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2644 auto it = compiled_methods_.find(method_ref); 2645 if (it != compiled_methods_.end()) { 2646 compiled_method = it->second; 2647 compiled_methods_.erase(it); 2648 } 2649 } 2650 if (compiled_method != nullptr) { 2651 CompiledMethod::ReleaseSwapAllocatedCompiledMethod(this, compiled_method); 2652 } 2653} 2654 2655CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2656 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2657 ClassTable::const_iterator it = compiled_classes_.find(ref); 2658 if (it == compiled_classes_.end()) { 2659 return nullptr; 2660 } 2661 CHECK(it->second != nullptr); 2662 return it->second; 2663} 2664 2665void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2666 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2667 auto it = compiled_classes_.find(ref); 2668 if (it == compiled_classes_.end() || it->second->GetStatus() != status) { 2669 // An entry doesn't exist or the status is lower than the new status. 2670 if (it != compiled_classes_.end()) { 2671 CHECK_GT(status, it->second->GetStatus()); 2672 delete it->second; 2673 } 2674 switch (status) { 2675 case mirror::Class::kStatusNotReady: 2676 case mirror::Class::kStatusError: 2677 case mirror::Class::kStatusRetryVerificationAtRuntime: 2678 case mirror::Class::kStatusVerified: 2679 case mirror::Class::kStatusInitialized: 2680 case mirror::Class::kStatusResolved: 2681 break; // Expected states. 2682 default: 2683 LOG(FATAL) << "Unexpected class status for class " 2684 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2685 << " of " << status; 2686 } 2687 CompiledClass* compiled_class = new CompiledClass(status); 2688 compiled_classes_.Overwrite(ref, compiled_class); 2689 } 2690} 2691 2692CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2693 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2694 MethodTable::const_iterator it = compiled_methods_.find(ref); 2695 if (it == compiled_methods_.end()) { 2696 return nullptr; 2697 } 2698 CHECK(it->second != nullptr); 2699 return it->second; 2700} 2701 2702bool CompilerDriver::IsMethodVerifiedWithoutFailures(uint32_t method_idx, 2703 uint16_t class_def_idx, 2704 const DexFile& dex_file) const { 2705 const VerifiedMethod* verified_method = GetVerifiedMethod(&dex_file, method_idx); 2706 if (verified_method != nullptr) { 2707 return !verified_method->HasVerificationFailures(); 2708 } 2709 2710 // If we can't find verification metadata, check if this is a system class (we trust that system 2711 // classes have their methods verified). If it's not, be conservative and assume the method 2712 // has not been verified successfully. 2713 2714 // TODO: When compiling the boot image it should be safe to assume that everything is verified, 2715 // even if methods are not found in the verification cache. 2716 const char* descriptor = dex_file.GetClassDescriptor(dex_file.GetClassDef(class_def_idx)); 2717 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2718 Thread* self = Thread::Current(); 2719 ScopedObjectAccess soa(self); 2720 bool is_system_class = class_linker->FindSystemClass(self, descriptor) != nullptr; 2721 if (!is_system_class) { 2722 self->ClearException(); 2723 } 2724 return is_system_class; 2725} 2726 2727size_t CompilerDriver::GetNonRelativeLinkerPatchCount() const { 2728 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2729 return non_relative_linker_patch_count_; 2730} 2731 2732void CompilerDriver::SetRequiresConstructorBarrier(Thread* self, 2733 const DexFile* dex_file, 2734 uint16_t class_def_index, 2735 bool requires) { 2736 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2737 requires_constructor_barrier_.emplace(ClassReference(dex_file, class_def_index), requires); 2738} 2739 2740bool CompilerDriver::RequiresConstructorBarrier(Thread* self, 2741 const DexFile* dex_file, 2742 uint16_t class_def_index) { 2743 ClassReference class_ref(dex_file, class_def_index); 2744 { 2745 ReaderMutexLock mu(self, requires_constructor_barrier_lock_); 2746 auto it = requires_constructor_barrier_.find(class_ref); 2747 if (it != requires_constructor_barrier_.end()) { 2748 return it->second; 2749 } 2750 } 2751 WriterMutexLock mu(self, requires_constructor_barrier_lock_); 2752 const bool requires = RequiresConstructorBarrier(*dex_file, class_def_index); 2753 requires_constructor_barrier_.emplace(class_ref, requires); 2754 return requires; 2755} 2756 2757std::string CompilerDriver::GetMemoryUsageString(bool extended) const { 2758 std::ostringstream oss; 2759 const gc::Heap* const heap = Runtime::Current()->GetHeap(); 2760 const size_t java_alloc = heap->GetBytesAllocated(); 2761 oss << "arena alloc=" << PrettySize(max_arena_alloc_) << " (" << max_arena_alloc_ << "B)"; 2762 oss << " java alloc=" << PrettySize(java_alloc) << " (" << java_alloc << "B)"; 2763#if defined(__BIONIC__) || defined(__GLIBC__) 2764 const struct mallinfo info = mallinfo(); 2765 const size_t allocated_space = static_cast<size_t>(info.uordblks); 2766 const size_t free_space = static_cast<size_t>(info.fordblks); 2767 oss << " native alloc=" << PrettySize(allocated_space) << " (" << allocated_space << "B)" 2768 << " free=" << PrettySize(free_space) << " (" << free_space << "B)"; 2769#endif 2770 compiled_method_storage_.DumpMemoryUsage(oss, extended); 2771 return oss.str(); 2772} 2773 2774bool CompilerDriver::IsStringTypeIndex(uint16_t type_index, const DexFile* dex_file) { 2775 const char* type = dex_file->GetTypeDescriptor(dex_file->GetTypeId(type_index)); 2776 return strcmp(type, "Ljava/lang/String;") == 0; 2777} 2778 2779bool CompilerDriver::IsStringInit(uint32_t method_index, const DexFile* dex_file, int32_t* offset) { 2780 DexFileMethodInliner* inliner = GetMethodInlinerMap()->GetMethodInliner(dex_file); 2781 size_t pointer_size = InstructionSetPointerSize(GetInstructionSet()); 2782 *offset = inliner->GetOffsetForStringInit(method_index, pointer_size); 2783 return inliner->IsStringInitMethodIndex(method_index); 2784} 2785 2786bool CompilerDriver::MayInlineInternal(const DexFile* inlined_from, 2787 const DexFile* inlined_into) const { 2788 // We're not allowed to inline across dex files if we're the no-inline-from dex file. 2789 if (inlined_from != inlined_into && 2790 compiler_options_->GetNoInlineFromDexFile() != nullptr && 2791 ContainsElement(*compiler_options_->GetNoInlineFromDexFile(), inlined_from)) { 2792 return false; 2793 } 2794 2795 return true; 2796} 2797 2798void CompilerDriver::InitializeThreadPools() { 2799 size_t parallel_count = parallel_thread_count_ > 0 ? parallel_thread_count_ - 1 : 0; 2800 parallel_thread_pool_.reset( 2801 new ThreadPool("Compiler driver thread pool", parallel_count)); 2802 single_thread_pool_.reset(new ThreadPool("Single-threaded Compiler driver thread pool", 0)); 2803} 2804 2805void CompilerDriver::FreeThreadPools() { 2806 parallel_thread_pool_.reset(); 2807 single_thread_pool_.reset(); 2808} 2809 2810} // namespace art 2811