compiler_driver.cc revision f535c69f115c61ffadca1bd2706244d0aa30f9aa
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "compiler_driver.h" 18 19#define ATRACE_TAG ATRACE_TAG_DALVIK 20#include <utils/Trace.h> 21 22#include <vector> 23#include <unistd.h> 24 25#ifndef __APPLE__ 26#include <malloc.h> // For mallinfo 27#endif 28 29#include "base/stl_util.h" 30#include "base/timing_logger.h" 31#include "class_linker.h" 32#include "compiled_class.h" 33#include "compiler.h" 34#include "compiler_driver-inl.h" 35#include "dex_compilation_unit.h" 36#include "dex_file-inl.h" 37#include "dex/verification_results.h" 38#include "dex/verified_method.h" 39#include "dex/quick/dex_file_method_inliner.h" 40#include "driver/compiler_options.h" 41#include "jni_internal.h" 42#include "object_lock.h" 43#include "profiler.h" 44#include "runtime.h" 45#include "gc/accounting/card_table-inl.h" 46#include "gc/accounting/heap_bitmap.h" 47#include "gc/space/space.h" 48#include "mirror/art_field-inl.h" 49#include "mirror/art_method-inl.h" 50#include "mirror/class_loader.h" 51#include "mirror/class-inl.h" 52#include "mirror/dex_cache-inl.h" 53#include "mirror/object-inl.h" 54#include "mirror/object_array-inl.h" 55#include "mirror/throwable.h" 56#include "scoped_thread_state_change.h" 57#include "ScopedLocalRef.h" 58#include "handle_scope-inl.h" 59#include "thread.h" 60#include "thread_pool.h" 61#include "trampolines/trampoline_compiler.h" 62#include "transaction.h" 63#include "verifier/method_verifier.h" 64#include "verifier/method_verifier-inl.h" 65 66namespace art { 67 68static constexpr bool kTimeCompileMethod = !kIsDebugBuild; 69 70static double Percentage(size_t x, size_t y) { 71 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 72} 73 74static void DumpStat(size_t x, size_t y, const char* str) { 75 if (x == 0 && y == 0) { 76 return; 77 } 78 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 79} 80 81class CompilerDriver::AOTCompilationStats { 82 public: 83 AOTCompilationStats() 84 : stats_lock_("AOT compilation statistics lock"), 85 types_in_dex_cache_(0), types_not_in_dex_cache_(0), 86 strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), 87 resolved_types_(0), unresolved_types_(0), 88 resolved_instance_fields_(0), unresolved_instance_fields_(0), 89 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 90 type_based_devirtualization_(0), 91 safe_casts_(0), not_safe_casts_(0) { 92 for (size_t i = 0; i <= kMaxInvokeType; i++) { 93 resolved_methods_[i] = 0; 94 unresolved_methods_[i] = 0; 95 virtual_made_direct_[i] = 0; 96 direct_calls_to_boot_[i] = 0; 97 direct_methods_to_boot_[i] = 0; 98 } 99 } 100 101 void Dump() { 102 DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); 103 DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); 104 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 105 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 106 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 107 "static fields resolved"); 108 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 109 "static fields local to a class"); 110 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 111 // Note, the code below subtracts the stat value so that when added to the stat value we have 112 // 100% of samples. TODO: clean this up. 113 DumpStat(type_based_devirtualization_, 114 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 115 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 116 type_based_devirtualization_, 117 "virtual/interface calls made direct based on type information"); 118 119 for (size_t i = 0; i <= kMaxInvokeType; i++) { 120 std::ostringstream oss; 121 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 122 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 123 if (virtual_made_direct_[i] > 0) { 124 std::ostringstream oss2; 125 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 126 DumpStat(virtual_made_direct_[i], 127 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 128 oss2.str().c_str()); 129 } 130 if (direct_calls_to_boot_[i] > 0) { 131 std::ostringstream oss2; 132 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 133 DumpStat(direct_calls_to_boot_[i], 134 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 135 oss2.str().c_str()); 136 } 137 if (direct_methods_to_boot_[i] > 0) { 138 std::ostringstream oss2; 139 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 140 DumpStat(direct_methods_to_boot_[i], 141 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 142 oss2.str().c_str()); 143 } 144 } 145 } 146 147// Allow lossy statistics in non-debug builds. 148#ifndef NDEBUG 149#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 150#else 151#define STATS_LOCK() 152#endif 153 154 void TypeInDexCache() { 155 STATS_LOCK(); 156 types_in_dex_cache_++; 157 } 158 159 void TypeNotInDexCache() { 160 STATS_LOCK(); 161 types_not_in_dex_cache_++; 162 } 163 164 void StringInDexCache() { 165 STATS_LOCK(); 166 strings_in_dex_cache_++; 167 } 168 169 void StringNotInDexCache() { 170 STATS_LOCK(); 171 strings_not_in_dex_cache_++; 172 } 173 174 void TypeDoesntNeedAccessCheck() { 175 STATS_LOCK(); 176 resolved_types_++; 177 } 178 179 void TypeNeedsAccessCheck() { 180 STATS_LOCK(); 181 unresolved_types_++; 182 } 183 184 void ResolvedInstanceField() { 185 STATS_LOCK(); 186 resolved_instance_fields_++; 187 } 188 189 void UnresolvedInstanceField() { 190 STATS_LOCK(); 191 unresolved_instance_fields_++; 192 } 193 194 void ResolvedLocalStaticField() { 195 STATS_LOCK(); 196 resolved_local_static_fields_++; 197 } 198 199 void ResolvedStaticField() { 200 STATS_LOCK(); 201 resolved_static_fields_++; 202 } 203 204 void UnresolvedStaticField() { 205 STATS_LOCK(); 206 unresolved_static_fields_++; 207 } 208 209 // Indicate that type information from the verifier led to devirtualization. 210 void PreciseTypeDevirtualization() { 211 STATS_LOCK(); 212 type_based_devirtualization_++; 213 } 214 215 // Indicate that a method of the given type was resolved at compile time. 216 void ResolvedMethod(InvokeType type) { 217 DCHECK_LE(type, kMaxInvokeType); 218 STATS_LOCK(); 219 resolved_methods_[type]++; 220 } 221 222 // Indicate that a method of the given type was unresolved at compile time as it was in an 223 // unknown dex file. 224 void UnresolvedMethod(InvokeType type) { 225 DCHECK_LE(type, kMaxInvokeType); 226 STATS_LOCK(); 227 unresolved_methods_[type]++; 228 } 229 230 // Indicate that a type of virtual method dispatch has been converted into a direct method 231 // dispatch. 232 void VirtualMadeDirect(InvokeType type) { 233 DCHECK(type == kVirtual || type == kInterface || type == kSuper); 234 STATS_LOCK(); 235 virtual_made_direct_[type]++; 236 } 237 238 // Indicate that a method of the given type was able to call directly into boot. 239 void DirectCallsToBoot(InvokeType type) { 240 DCHECK_LE(type, kMaxInvokeType); 241 STATS_LOCK(); 242 direct_calls_to_boot_[type]++; 243 } 244 245 // Indicate that a method of the given type was able to be resolved directly from boot. 246 void DirectMethodsToBoot(InvokeType type) { 247 DCHECK_LE(type, kMaxInvokeType); 248 STATS_LOCK(); 249 direct_methods_to_boot_[type]++; 250 } 251 252 void ProcessedInvoke(InvokeType type, int flags) { 253 STATS_LOCK(); 254 if (flags == 0) { 255 unresolved_methods_[type]++; 256 } else { 257 DCHECK_NE((flags & kFlagMethodResolved), 0); 258 resolved_methods_[type]++; 259 if ((flags & kFlagVirtualMadeDirect) != 0) { 260 virtual_made_direct_[type]++; 261 if ((flags & kFlagPreciseTypeDevirtualization) != 0) { 262 type_based_devirtualization_++; 263 } 264 } else { 265 DCHECK_EQ((flags & kFlagPreciseTypeDevirtualization), 0); 266 } 267 if ((flags & kFlagDirectCallToBoot) != 0) { 268 direct_calls_to_boot_[type]++; 269 } 270 if ((flags & kFlagDirectMethodToBoot) != 0) { 271 direct_methods_to_boot_[type]++; 272 } 273 } 274 } 275 276 // A check-cast could be eliminated due to verifier type analysis. 277 void SafeCast() { 278 STATS_LOCK(); 279 safe_casts_++; 280 } 281 282 // A check-cast couldn't be eliminated due to verifier type analysis. 283 void NotASafeCast() { 284 STATS_LOCK(); 285 not_safe_casts_++; 286 } 287 288 private: 289 Mutex stats_lock_; 290 291 size_t types_in_dex_cache_; 292 size_t types_not_in_dex_cache_; 293 294 size_t strings_in_dex_cache_; 295 size_t strings_not_in_dex_cache_; 296 297 size_t resolved_types_; 298 size_t unresolved_types_; 299 300 size_t resolved_instance_fields_; 301 size_t unresolved_instance_fields_; 302 303 size_t resolved_local_static_fields_; 304 size_t resolved_static_fields_; 305 size_t unresolved_static_fields_; 306 // Type based devirtualization for invoke interface and virtual. 307 size_t type_based_devirtualization_; 308 309 size_t resolved_methods_[kMaxInvokeType + 1]; 310 size_t unresolved_methods_[kMaxInvokeType + 1]; 311 size_t virtual_made_direct_[kMaxInvokeType + 1]; 312 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 313 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 314 315 size_t safe_casts_; 316 size_t not_safe_casts_; 317 318 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 319}; 320 321 322extern "C" art::CompiledMethod* ArtCompileDEX(art::CompilerDriver& compiler, 323 const art::DexFile::CodeItem* code_item, 324 uint32_t access_flags, 325 art::InvokeType invoke_type, 326 uint16_t class_def_idx, 327 uint32_t method_idx, 328 jobject class_loader, 329 const art::DexFile& dex_file); 330 331CompilerDriver::CompilerDriver(const CompilerOptions* compiler_options, 332 VerificationResults* verification_results, 333 DexFileToMethodInlinerMap* method_inliner_map, 334 Compiler::Kind compiler_kind, 335 InstructionSet instruction_set, 336 InstructionSetFeatures instruction_set_features, 337 bool image, std::set<std::string>* image_classes, 338 std::set<std::string>* compiled_classes, size_t thread_count, 339 bool dump_stats, bool dump_passes, CumulativeLogger* timer, 340 std::string profile_file) 341 : profile_present_(false), compiler_options_(compiler_options), 342 verification_results_(verification_results), 343 method_inliner_map_(method_inliner_map), 344 compiler_(Compiler::Create(this, compiler_kind)), 345 instruction_set_(instruction_set), 346 instruction_set_features_(instruction_set_features), 347 freezing_constructor_lock_("freezing constructor lock"), 348 compiled_classes_lock_("compiled classes lock"), 349 compiled_methods_lock_("compiled method lock"), 350 image_(image), 351 image_classes_(image_classes), 352 classes_to_compile_(compiled_classes), 353 thread_count_(thread_count), 354 start_ns_(0), 355 stats_(new AOTCompilationStats), 356 dump_stats_(dump_stats), 357 dump_passes_(dump_passes), 358 timings_logger_(timer), 359 compiler_library_(nullptr), 360 compiler_context_(nullptr), 361 compiler_enable_auto_elf_loading_(nullptr), 362 compiler_get_method_code_addr_(nullptr), 363 support_boot_image_fixup_(instruction_set != kMips), 364 cfi_info_(nullptr), 365 dedupe_code_("dedupe code"), 366 dedupe_mapping_table_("dedupe mapping table"), 367 dedupe_vmap_table_("dedupe vmap table"), 368 dedupe_gc_map_("dedupe gc map"), 369 dedupe_cfi_info_("dedupe cfi info") { 370 DCHECK(compiler_options_ != nullptr); 371 DCHECK(verification_results_ != nullptr); 372 DCHECK(method_inliner_map_ != nullptr); 373 374 CHECK_PTHREAD_CALL(pthread_key_create, (&tls_key_, nullptr), "compiler tls key"); 375 376 dex_to_dex_compiler_ = reinterpret_cast<DexToDexCompilerFn>(ArtCompileDEX); 377 378 compiler_->Init(); 379 380 CHECK(!Runtime::Current()->IsStarted()); 381 if (image_) { 382 CHECK(image_classes_.get() != nullptr); 383 } else { 384 CHECK(image_classes_.get() == nullptr); 385 } 386 387 // Are we generating CFI information? 388 if (compiler_options->GetGenerateGDBInformation()) { 389 cfi_info_.reset(compiler_->GetCallFrameInformationInitialization(*this)); 390 } 391 392 // Read the profile file if one is provided. 393 if (!profile_file.empty()) { 394 profile_present_ = profile_file_.LoadFile(profile_file); 395 if (profile_present_) { 396 LOG(INFO) << "Using profile data form file " << profile_file; 397 } else { 398 LOG(INFO) << "Failed to load profile file " << profile_file; 399 } 400 } 401} 402 403std::vector<uint8_t>* CompilerDriver::DeduplicateCode(const std::vector<uint8_t>& code) { 404 return dedupe_code_.Add(Thread::Current(), code); 405} 406 407std::vector<uint8_t>* CompilerDriver::DeduplicateMappingTable(const std::vector<uint8_t>& code) { 408 return dedupe_mapping_table_.Add(Thread::Current(), code); 409} 410 411std::vector<uint8_t>* CompilerDriver::DeduplicateVMapTable(const std::vector<uint8_t>& code) { 412 return dedupe_vmap_table_.Add(Thread::Current(), code); 413} 414 415std::vector<uint8_t>* CompilerDriver::DeduplicateGCMap(const std::vector<uint8_t>& code) { 416 return dedupe_gc_map_.Add(Thread::Current(), code); 417} 418 419std::vector<uint8_t>* CompilerDriver::DeduplicateCFIInfo(const std::vector<uint8_t>* cfi_info) { 420 if (cfi_info == nullptr) { 421 return nullptr; 422 } 423 return dedupe_cfi_info_.Add(Thread::Current(), *cfi_info); 424} 425 426CompilerDriver::~CompilerDriver() { 427 Thread* self = Thread::Current(); 428 { 429 MutexLock mu(self, compiled_classes_lock_); 430 STLDeleteValues(&compiled_classes_); 431 STLDeleteValues(&compiled_methods_); 432 STLDeleteElements(&code_to_patch_); 433 STLDeleteElements(&methods_to_patch_); 434 STLDeleteElements(&classes_to_patch_); 435 STLDeleteElements(&strings_to_patch_); 436 } 437 CHECK_PTHREAD_CALL(pthread_key_delete, (tls_key_), "delete tls key"); 438 compiler_->UnInit(); 439} 440 441CompilerTls* CompilerDriver::GetTls() { 442 // Lazily create thread-local storage 443 CompilerTls* res = static_cast<CompilerTls*>(pthread_getspecific(tls_key_)); 444 if (res == nullptr) { 445 res = new CompilerTls(); 446 CHECK_PTHREAD_CALL(pthread_setspecific, (tls_key_, res), "compiler tls"); 447 } 448 return res; 449} 450 451#define CREATE_TRAMPOLINE(type, abi, offset) \ 452 if (Is64BitInstructionSet(instruction_set_)) { \ 453 return CreateTrampoline64(instruction_set_, abi, \ 454 type ## _ENTRYPOINT_OFFSET(8, offset)); \ 455 } else { \ 456 return CreateTrampoline32(instruction_set_, abi, \ 457 type ## _ENTRYPOINT_OFFSET(4, offset)); \ 458 } 459 460const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToInterpreterBridge() const { 461 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToInterpreterBridge) 462} 463 464const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToCompiledCodeBridge() const { 465 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToCompiledCodeBridge) 466} 467 468const std::vector<uint8_t>* CompilerDriver::CreateJniDlsymLookup() const { 469 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 470} 471 472const std::vector<uint8_t>* CompilerDriver::CreatePortableImtConflictTrampoline() const { 473 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableImtConflictTrampoline) 474} 475 476const std::vector<uint8_t>* CompilerDriver::CreatePortableResolutionTrampoline() const { 477 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableResolutionTrampoline) 478} 479 480const std::vector<uint8_t>* CompilerDriver::CreatePortableToInterpreterBridge() const { 481 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableToInterpreterBridge) 482} 483 484const std::vector<uint8_t>* CompilerDriver::CreateQuickGenericJniTrampoline() const { 485 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 486} 487 488const std::vector<uint8_t>* CompilerDriver::CreateQuickImtConflictTrampoline() const { 489 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 490} 491 492const std::vector<uint8_t>* CompilerDriver::CreateQuickResolutionTrampoline() const { 493 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 494} 495 496const std::vector<uint8_t>* CompilerDriver::CreateQuickToInterpreterBridge() const { 497 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 498} 499#undef CREATE_TRAMPOLINE 500 501void CompilerDriver::CompileAll(jobject class_loader, 502 const std::vector<const DexFile*>& dex_files, 503 TimingLogger* timings) { 504 DCHECK(!Runtime::Current()->IsStarted()); 505 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", thread_count_ - 1)); 506 VLOG(compiler) << "Before precompile " << GetMemoryUsageString(); 507 PreCompile(class_loader, dex_files, thread_pool.get(), timings); 508 Compile(class_loader, dex_files, thread_pool.get(), timings); 509 if (dump_stats_) { 510 stats_->Dump(); 511 } 512} 513 514static DexToDexCompilationLevel GetDexToDexCompilationlevel( 515 Thread* self, Handle<mirror::ClassLoader> class_loader, const DexFile& dex_file, 516 const DexFile::ClassDef& class_def) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 517 const char* descriptor = dex_file.GetClassDescriptor(class_def); 518 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 519 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 520 if (klass == nullptr) { 521 CHECK(self->IsExceptionPending()); 522 self->ClearException(); 523 return kDontDexToDexCompile; 524 } 525 // DexToDex at the kOptimize level may introduce quickened opcodes, which replace symbolic 526 // references with actual offsets. We cannot re-verify such instructions. 527 // 528 // We store the verification information in the class status in the oat file, which the linker 529 // can validate (checksums) and use to skip load-time verification. It is thus safe to 530 // optimize when a class has been fully verified before. 531 if (klass->IsVerified()) { 532 // Class is verified so we can enable DEX-to-DEX compilation for performance. 533 return kOptimize; 534 } else if (klass->IsCompileTimeVerified()) { 535 // Class verification has soft-failed. Anyway, ensure at least correctness. 536 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 537 return kRequired; 538 } else { 539 // Class verification has failed: do not run DEX-to-DEX compilation. 540 return kDontDexToDexCompile; 541 } 542} 543 544void CompilerDriver::CompileOne(mirror::ArtMethod* method, TimingLogger* timings) { 545 DCHECK(!Runtime::Current()->IsStarted()); 546 Thread* self = Thread::Current(); 547 jobject jclass_loader; 548 const DexFile* dex_file; 549 uint16_t class_def_idx; 550 uint32_t method_idx = method->GetDexMethodIndex(); 551 uint32_t access_flags = method->GetAccessFlags(); 552 InvokeType invoke_type = method->GetInvokeType(); 553 { 554 ScopedObjectAccessUnchecked soa(self); 555 ScopedLocalRef<jobject> 556 local_class_loader(soa.Env(), 557 soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 558 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 559 // Find the dex_file 560 dex_file = method->GetDexFile(); 561 class_def_idx = method->GetClassDefIndex(); 562 } 563 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 564 self->TransitionFromRunnableToSuspended(kNative); 565 566 std::vector<const DexFile*> dex_files; 567 dex_files.push_back(dex_file); 568 569 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", 0U)); 570 PreCompile(jclass_loader, dex_files, thread_pool.get(), timings); 571 572 // Can we run DEX-to-DEX compiler on this class ? 573 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 574 { 575 ScopedObjectAccess soa(Thread::Current()); 576 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_idx); 577 StackHandleScope<1> hs(soa.Self()); 578 Handle<mirror::ClassLoader> class_loader( 579 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 580 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(self, class_loader, *dex_file, 581 class_def); 582 } 583 CompileMethod(code_item, access_flags, invoke_type, class_def_idx, method_idx, jclass_loader, 584 *dex_file, dex_to_dex_compilation_level, true); 585 586 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 587 588 self->TransitionFromSuspendedToRunnable(); 589} 590 591void CompilerDriver::Resolve(jobject class_loader, const std::vector<const DexFile*>& dex_files, 592 ThreadPool* thread_pool, TimingLogger* timings) { 593 for (size_t i = 0; i != dex_files.size(); ++i) { 594 const DexFile* dex_file = dex_files[i]; 595 CHECK(dex_file != nullptr); 596 ResolveDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 597 } 598} 599 600void CompilerDriver::PreCompile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 601 ThreadPool* thread_pool, TimingLogger* timings) { 602 LoadImageClasses(timings); 603 VLOG(compiler) << "LoadImageClasses: " << GetMemoryUsageString(); 604 605 Resolve(class_loader, dex_files, thread_pool, timings); 606 VLOG(compiler) << "Resolve: " << GetMemoryUsageString(); 607 608 if (!compiler_options_->IsVerificationEnabled()) { 609 VLOG(compiler) << "Verify none mode specified, skipping verification."; 610 SetVerified(class_loader, dex_files, thread_pool, timings); 611 return; 612 } 613 614 Verify(class_loader, dex_files, thread_pool, timings); 615 VLOG(compiler) << "Verify: " << GetMemoryUsageString(); 616 617 InitializeClasses(class_loader, dex_files, thread_pool, timings); 618 VLOG(compiler) << "InitializeClasses: " << GetMemoryUsageString(); 619 620 UpdateImageClasses(timings); 621 VLOG(compiler) << "UpdateImageClasses: " << GetMemoryUsageString(); 622} 623 624bool CompilerDriver::IsImageClass(const char* descriptor) const { 625 if (!IsImage()) { 626 return true; 627 } else { 628 return image_classes_->find(descriptor) != image_classes_->end(); 629 } 630} 631 632bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 633 if (!IsImage()) { 634 return true; 635 } else { 636 if (classes_to_compile_ == nullptr) { 637 return true; 638 } 639 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 640 } 641} 642 643static void ResolveExceptionsForMethod(MethodHelper* mh, 644 std::set<std::pair<uint16_t, const DexFile*>>& exceptions_to_resolve) 645 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 646 const DexFile::CodeItem* code_item = mh->GetMethod()->GetCodeItem(); 647 if (code_item == nullptr) { 648 return; // native or abstract method 649 } 650 if (code_item->tries_size_ == 0) { 651 return; // nothing to process 652 } 653 const byte* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 654 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 655 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 656 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 657 bool has_catch_all = false; 658 if (encoded_catch_handler_size <= 0) { 659 encoded_catch_handler_size = -encoded_catch_handler_size; 660 has_catch_all = true; 661 } 662 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 663 uint16_t encoded_catch_handler_handlers_type_idx = 664 DecodeUnsignedLeb128(&encoded_catch_handler_list); 665 // Add to set of types to resolve if not already in the dex cache resolved types 666 if (!mh->GetMethod()->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 667 exceptions_to_resolve.insert( 668 std::pair<uint16_t, const DexFile*>(encoded_catch_handler_handlers_type_idx, 669 mh->GetMethod()->GetDexFile())); 670 } 671 // ignore address associated with catch handler 672 DecodeUnsignedLeb128(&encoded_catch_handler_list); 673 } 674 if (has_catch_all) { 675 // ignore catch all address 676 DecodeUnsignedLeb128(&encoded_catch_handler_list); 677 } 678 } 679} 680 681static bool ResolveCatchBlockExceptionsClassVisitor(mirror::Class* c, void* arg) 682 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 683 std::set<std::pair<uint16_t, const DexFile*>>* exceptions_to_resolve = 684 reinterpret_cast<std::set<std::pair<uint16_t, const DexFile*>>*>(arg); 685 StackHandleScope<1> hs(Thread::Current()); 686 MethodHelper mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); 687 for (size_t i = 0; i < c->NumVirtualMethods(); ++i) { 688 mh.ChangeMethod(c->GetVirtualMethod(i)); 689 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 690 } 691 for (size_t i = 0; i < c->NumDirectMethods(); ++i) { 692 mh.ChangeMethod(c->GetDirectMethod(i)); 693 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 694 } 695 return true; 696} 697 698static bool RecordImageClassesVisitor(mirror::Class* klass, void* arg) 699 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 700 std::set<std::string>* image_classes = reinterpret_cast<std::set<std::string>*>(arg); 701 std::string temp; 702 image_classes->insert(klass->GetDescriptor(&temp)); 703 return true; 704} 705 706// Make a list of descriptors for classes to include in the image 707void CompilerDriver::LoadImageClasses(TimingLogger* timings) 708 LOCKS_EXCLUDED(Locks::mutator_lock_) { 709 CHECK(timings != nullptr); 710 if (!IsImage()) { 711 return; 712 } 713 714 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 715 // Make a first class to load all classes explicitly listed in the file 716 Thread* self = Thread::Current(); 717 ScopedObjectAccess soa(self); 718 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 719 CHECK(image_classes_.get() != nullptr); 720 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 721 const std::string& descriptor(*it); 722 StackHandleScope<1> hs(self); 723 Handle<mirror::Class> klass( 724 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 725 if (klass.Get() == nullptr) { 726 VLOG(compiler) << "Failed to find class " << descriptor; 727 image_classes_->erase(it++); 728 self->ClearException(); 729 } else { 730 ++it; 731 } 732 } 733 734 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 735 // exceptions are resolved by the verifier when there is a catch block in an interested method. 736 // Do this here so that exception classes appear to have been specified image classes. 737 std::set<std::pair<uint16_t, const DexFile*>> unresolved_exception_types; 738 StackHandleScope<1> hs(self); 739 Handle<mirror::Class> java_lang_Throwable( 740 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 741 do { 742 unresolved_exception_types.clear(); 743 class_linker->VisitClasses(ResolveCatchBlockExceptionsClassVisitor, 744 &unresolved_exception_types); 745 for (const std::pair<uint16_t, const DexFile*>& exception_type : unresolved_exception_types) { 746 uint16_t exception_type_idx = exception_type.first; 747 const DexFile* dex_file = exception_type.second; 748 StackHandleScope<2> hs(self); 749 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(*dex_file))); 750 Handle<mirror::Class> klass(hs.NewHandle( 751 class_linker->ResolveType(*dex_file, exception_type_idx, dex_cache, 752 NullHandle<mirror::ClassLoader>()))); 753 if (klass.Get() == nullptr) { 754 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 755 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 756 LOG(FATAL) << "Failed to resolve class " << descriptor; 757 } 758 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 759 } 760 // Resolving exceptions may load classes that reference more exceptions, iterate until no 761 // more are found 762 } while (!unresolved_exception_types.empty()); 763 764 // We walk the roots looking for classes so that we'll pick up the 765 // above classes plus any classes them depend on such super 766 // classes, interfaces, and the required ClassLinker roots. 767 class_linker->VisitClasses(RecordImageClassesVisitor, image_classes_.get()); 768 769 CHECK_NE(image_classes_->size(), 0U); 770} 771 772static void MaybeAddToImageClasses(Handle<mirror::Class> c, std::set<std::string>* image_classes) 773 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 774 Thread* self = Thread::Current(); 775 StackHandleScope<1> hs(self); 776 // Make a copy of the handle so that we don't clobber it doing Assign. 777 Handle<mirror::Class> klass(hs.NewHandle(c.Get())); 778 std::string temp; 779 while (!klass->IsObjectClass()) { 780 const char* descriptor = klass->GetDescriptor(&temp); 781 std::pair<std::set<std::string>::iterator, bool> result = image_classes->insert(descriptor); 782 if (!result.second) { // Previously inserted. 783 break; 784 } 785 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 786 for (size_t i = 0; i < klass->NumDirectInterfaces(); ++i) { 787 StackHandleScope<1> hs(self); 788 MaybeAddToImageClasses(hs.NewHandle(mirror::Class::GetDirectInterface(self, klass, i)), 789 image_classes); 790 } 791 if (klass->IsArrayClass()) { 792 StackHandleScope<1> hs(self); 793 MaybeAddToImageClasses(hs.NewHandle(klass->GetComponentType()), image_classes); 794 } 795 klass.Assign(klass->GetSuperClass()); 796 } 797} 798 799void CompilerDriver::FindClinitImageClassesCallback(mirror::Object* object, void* arg) { 800 DCHECK(object != nullptr); 801 DCHECK(arg != nullptr); 802 CompilerDriver* compiler_driver = reinterpret_cast<CompilerDriver*>(arg); 803 StackHandleScope<1> hs(Thread::Current()); 804 MaybeAddToImageClasses(hs.NewHandle(object->GetClass()), compiler_driver->image_classes_.get()); 805} 806 807void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 808 if (IsImage()) { 809 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 810 // Update image_classes_ with classes for objects created by <clinit> methods. 811 Thread* self = Thread::Current(); 812 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter"); 813 gc::Heap* heap = Runtime::Current()->GetHeap(); 814 // TODO: Image spaces only? 815 ScopedObjectAccess soa(Thread::Current()); 816 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 817 heap->VisitObjects(FindClinitImageClassesCallback, this); 818 self->EndAssertNoThreadSuspension(old_cause); 819 } 820} 821 822bool CompilerDriver::CanAssumeTypeIsPresentInDexCache(const DexFile& dex_file, uint32_t type_idx) { 823 if (IsImage() && 824 IsImageClass(dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_))) { 825 { 826 ScopedObjectAccess soa(Thread::Current()); 827 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 828 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 829 if (resolved_class == nullptr) { 830 // Erroneous class. 831 stats_->TypeNotInDexCache(); 832 return false; 833 } 834 } 835 stats_->TypeInDexCache(); 836 return true; 837 } else { 838 stats_->TypeNotInDexCache(); 839 return false; 840 } 841} 842 843bool CompilerDriver::CanAssumeStringIsPresentInDexCache(const DexFile& dex_file, 844 uint32_t string_idx) { 845 // See also Compiler::ResolveDexFile 846 847 bool result = false; 848 if (IsImage()) { 849 // We resolve all const-string strings when building for the image. 850 ScopedObjectAccess soa(Thread::Current()); 851 StackHandleScope<1> hs(soa.Self()); 852 Handle<mirror::DexCache> dex_cache( 853 hs.NewHandle(Runtime::Current()->GetClassLinker()->FindDexCache(dex_file))); 854 Runtime::Current()->GetClassLinker()->ResolveString(dex_file, string_idx, dex_cache); 855 result = true; 856 } 857 if (result) { 858 stats_->StringInDexCache(); 859 } else { 860 stats_->StringNotInDexCache(); 861 } 862 return result; 863} 864 865bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, const DexFile& dex_file, 866 uint32_t type_idx, 867 bool* type_known_final, bool* type_known_abstract, 868 bool* equals_referrers_class) { 869 if (type_known_final != nullptr) { 870 *type_known_final = false; 871 } 872 if (type_known_abstract != nullptr) { 873 *type_known_abstract = false; 874 } 875 if (equals_referrers_class != nullptr) { 876 *equals_referrers_class = false; 877 } 878 ScopedObjectAccess soa(Thread::Current()); 879 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 880 // Get type from dex cache assuming it was populated by the verifier 881 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 882 if (resolved_class == nullptr) { 883 stats_->TypeNeedsAccessCheck(); 884 return false; // Unknown class needs access checks. 885 } 886 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 887 if (equals_referrers_class != nullptr) { 888 *equals_referrers_class = (method_id.class_idx_ == type_idx); 889 } 890 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 891 if (referrer_class == nullptr) { 892 stats_->TypeNeedsAccessCheck(); 893 return false; // Incomplete referrer knowledge needs access check. 894 } 895 // Perform access check, will return true if access is ok or false if we're going to have to 896 // check this at runtime (for example for class loaders). 897 bool result = referrer_class->CanAccess(resolved_class); 898 if (result) { 899 stats_->TypeDoesntNeedAccessCheck(); 900 if (type_known_final != nullptr) { 901 *type_known_final = resolved_class->IsFinal() && !resolved_class->IsArrayClass(); 902 } 903 if (type_known_abstract != nullptr) { 904 *type_known_abstract = resolved_class->IsAbstract() && !resolved_class->IsArrayClass(); 905 } 906 } else { 907 stats_->TypeNeedsAccessCheck(); 908 } 909 return result; 910} 911 912bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 913 const DexFile& dex_file, 914 uint32_t type_idx) { 915 ScopedObjectAccess soa(Thread::Current()); 916 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 917 // Get type from dex cache assuming it was populated by the verifier. 918 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 919 if (resolved_class == nullptr) { 920 stats_->TypeNeedsAccessCheck(); 921 return false; // Unknown class needs access checks. 922 } 923 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 924 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 925 if (referrer_class == nullptr) { 926 stats_->TypeNeedsAccessCheck(); 927 return false; // Incomplete referrer knowledge needs access check. 928 } 929 // Perform access and instantiable checks, will return true if access is ok or false if we're 930 // going to have to check this at runtime (for example for class loaders). 931 bool result = referrer_class->CanAccess(resolved_class) && resolved_class->IsInstantiable(); 932 if (result) { 933 stats_->TypeDoesntNeedAccessCheck(); 934 } else { 935 stats_->TypeNeedsAccessCheck(); 936 } 937 return result; 938} 939 940bool CompilerDriver::CanEmbedTypeInCode(const DexFile& dex_file, uint32_t type_idx, 941 bool* is_type_initialized, bool* use_direct_type_ptr, 942 uintptr_t* direct_type_ptr, bool* out_is_finalizable) { 943 if (GetCompilerOptions().GetCompilePic()) { 944 // Do not allow a direct class pointer to be used when compiling for position-independent 945 return false; 946 } 947 ScopedObjectAccess soa(Thread::Current()); 948 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 949 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 950 if (resolved_class == nullptr) { 951 return false; 952 } 953 *out_is_finalizable = resolved_class->IsFinalizable(); 954 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 955 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 956 if (compiling_boot) { 957 // boot -> boot class pointers. 958 // True if the class is in the image at boot compiling time. 959 const bool is_image_class = IsImage() && IsImageClass( 960 dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_)); 961 // True if pc relative load works. 962 if (is_image_class && support_boot_image_fixup) { 963 *is_type_initialized = resolved_class->IsInitialized(); 964 *use_direct_type_ptr = false; 965 *direct_type_ptr = 0; 966 return true; 967 } else { 968 return false; 969 } 970 } else { 971 // True if the class is in the image at app compiling time. 972 const bool class_in_image = 973 Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_class, false)->IsImageSpace(); 974 if (class_in_image && support_boot_image_fixup) { 975 // boot -> app class pointers. 976 *is_type_initialized = resolved_class->IsInitialized(); 977 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 978 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 979 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 980 return true; 981 } else { 982 // app -> app class pointers. 983 // Give up because app does not have an image and class 984 // isn't created at compile time. TODO: implement this 985 // if/when each app gets an image. 986 return false; 987 } 988 } 989} 990 991bool CompilerDriver::CanEmbedStringInCode(const DexFile& dex_file, uint32_t string_idx, 992 bool* use_direct_type_ptr, uintptr_t* direct_type_ptr) { 993 if (GetCompilerOptions().GetCompilePic()) { 994 // Do not allow a direct class pointer to be used when compiling for position-independent 995 return false; 996 } 997 ScopedObjectAccess soa(Thread::Current()); 998 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 999 mirror::String* resolved_string = dex_cache->GetResolvedString(string_idx); 1000 if (resolved_string == nullptr) { 1001 return false; 1002 } 1003 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 1004 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 1005 if (compiling_boot) { 1006 // boot -> boot class pointers. 1007 // True if the class is in the image at boot compiling time. 1008 const bool is_image_string = IsImage(); 1009 // True if pc relative load works. 1010 if (is_image_string && support_boot_image_fixup) { 1011 *use_direct_type_ptr = false; 1012 *direct_type_ptr = 0; 1013 return true; 1014 } 1015 return false; 1016 } else { 1017 // True if the class is in the image at app compiling time. 1018 const bool obj_in_image = 1019 false && Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_string, false)->IsImageSpace(); 1020 if (obj_in_image && support_boot_image_fixup) { 1021 // boot -> app class pointers. 1022 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1023 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 1024 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_string); 1025 return true; 1026 } 1027 1028 // app -> app class pointers. 1029 // Give up because app does not have an image and class 1030 // isn't created at compile time. TODO: implement this 1031 // if/when each app gets an image. 1032 return false; 1033 } 1034} 1035 1036void CompilerDriver::ProcessedInstanceField(bool resolved) { 1037 if (!resolved) { 1038 stats_->UnresolvedInstanceField(); 1039 } else { 1040 stats_->ResolvedInstanceField(); 1041 } 1042} 1043 1044void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1045 if (!resolved) { 1046 stats_->UnresolvedStaticField(); 1047 } else if (local) { 1048 stats_->ResolvedLocalStaticField(); 1049 } else { 1050 stats_->ResolvedStaticField(); 1051 } 1052} 1053 1054void CompilerDriver::ProcessedInvoke(InvokeType invoke_type, int flags) { 1055 stats_->ProcessedInvoke(invoke_type, flags); 1056} 1057 1058mirror::ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1059 const DexCompilationUnit* mUnit, 1060 bool is_put, 1061 const ScopedObjectAccess& soa) { 1062 // Try to resolve the field and compiling method's class. 1063 mirror::ArtField* resolved_field; 1064 mirror::Class* referrer_class; 1065 mirror::DexCache* dex_cache; 1066 { 1067 StackHandleScope<3> hs(soa.Self()); 1068 Handle<mirror::DexCache> dex_cache_handle( 1069 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1070 Handle<mirror::ClassLoader> class_loader_handle( 1071 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1072 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1073 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, false))); 1074 referrer_class = (resolved_field_handle.Get() != nullptr) 1075 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1076 resolved_field = resolved_field_handle.Get(); 1077 dex_cache = dex_cache_handle.Get(); 1078 } 1079 bool can_link = false; 1080 if (resolved_field != nullptr && referrer_class != nullptr) { 1081 std::pair<bool, bool> fast_path = IsFastInstanceField( 1082 dex_cache, referrer_class, resolved_field, field_idx); 1083 can_link = is_put ? fast_path.second : fast_path.first; 1084 } 1085 ProcessedInstanceField(can_link); 1086 return can_link ? resolved_field : nullptr; 1087} 1088 1089bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1090 bool is_put, MemberOffset* field_offset, 1091 bool* is_volatile) { 1092 ScopedObjectAccess soa(Thread::Current()); 1093 StackHandleScope<1> hs(soa.Self()); 1094 Handle<mirror::ArtField> resolved_field = 1095 hs.NewHandle(ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa)); 1096 1097 if (resolved_field.Get() == nullptr) { 1098 // Conservative defaults. 1099 *is_volatile = true; 1100 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1101 return false; 1102 } else { 1103 *is_volatile = resolved_field->IsVolatile(); 1104 *field_offset = resolved_field->GetOffset(); 1105 return true; 1106 } 1107} 1108 1109bool CompilerDriver::ComputeStaticFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1110 bool is_put, MemberOffset* field_offset, 1111 uint32_t* storage_index, bool* is_referrers_class, 1112 bool* is_volatile, bool* is_initialized) { 1113 ScopedObjectAccess soa(Thread::Current()); 1114 // Try to resolve the field and compiling method's class. 1115 mirror::ArtField* resolved_field; 1116 mirror::Class* referrer_class; 1117 mirror::DexCache* dex_cache; 1118 { 1119 StackHandleScope<3> hs(soa.Self()); 1120 Handle<mirror::DexCache> dex_cache_handle( 1121 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1122 Handle<mirror::ClassLoader> class_loader_handle( 1123 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1124 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1125 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, true))); 1126 referrer_class = (resolved_field_handle.Get() != nullptr) 1127 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1128 resolved_field = resolved_field_handle.Get(); 1129 dex_cache = dex_cache_handle.Get(); 1130 } 1131 bool result = false; 1132 if (resolved_field != nullptr && referrer_class != nullptr) { 1133 *is_volatile = IsFieldVolatile(resolved_field); 1134 std::pair<bool, bool> fast_path = IsFastStaticField( 1135 dex_cache, referrer_class, resolved_field, field_idx, field_offset, 1136 storage_index, is_referrers_class, is_initialized); 1137 result = is_put ? fast_path.second : fast_path.first; 1138 } 1139 if (!result) { 1140 // Conservative defaults. 1141 *is_volatile = true; 1142 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1143 *storage_index = -1; 1144 *is_referrers_class = false; 1145 *is_initialized = false; 1146 } 1147 ProcessedStaticField(result, *is_referrers_class); 1148 return result; 1149} 1150 1151void CompilerDriver::GetCodeAndMethodForDirectCall(InvokeType* type, InvokeType sharp_type, 1152 bool no_guarantee_of_dex_cache_entry, 1153 const mirror::Class* referrer_class, 1154 mirror::ArtMethod* method, 1155 int* stats_flags, 1156 MethodReference* target_method, 1157 uintptr_t* direct_code, 1158 uintptr_t* direct_method) { 1159 // For direct and static methods compute possible direct_code and direct_method values, ie 1160 // an address for the Method* being invoked and an address of the code for that Method*. 1161 // For interface calls compute a value for direct_method that is the interface method being 1162 // invoked, so this can be passed to the out-of-line runtime support code. 1163 *direct_code = 0; 1164 *direct_method = 0; 1165 bool use_dex_cache = GetCompilerOptions().GetCompilePic(); // Off by default 1166 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 1167 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1168 const bool force_relocations = (compiling_boot || 1169 GetCompilerOptions().GetIncludePatchInformation()); 1170 if (compiler_->IsPortable()) { 1171 if (sharp_type != kStatic && sharp_type != kDirect) { 1172 return; 1173 } 1174 use_dex_cache = true; 1175 } else { 1176 if (sharp_type != kStatic && sharp_type != kDirect) { 1177 return; 1178 } 1179 // TODO: support patching on all architectures. 1180 use_dex_cache = use_dex_cache || (force_relocations && !support_boot_image_fixup_); 1181 } 1182 bool method_code_in_boot = (method->GetDeclaringClass()->GetClassLoader() == nullptr); 1183 if (!use_dex_cache) { 1184 if (!method_code_in_boot) { 1185 use_dex_cache = true; 1186 } else { 1187 bool has_clinit_trampoline = 1188 method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); 1189 if (has_clinit_trampoline && (method->GetDeclaringClass() != referrer_class)) { 1190 // Ensure we run the clinit trampoline unless we are invoking a static method in the same 1191 // class. 1192 use_dex_cache = true; 1193 } 1194 } 1195 } 1196 if (method_code_in_boot) { 1197 *stats_flags |= kFlagDirectCallToBoot | kFlagDirectMethodToBoot; 1198 } 1199 if (!use_dex_cache && force_relocations) { 1200 if (!IsImage() || !IsImageClass(method->GetDeclaringClassDescriptor())) { 1201 // We can only branch directly to Methods that are resolved in the DexCache. 1202 // Otherwise we won't invoke the resolution trampoline. 1203 use_dex_cache = true; 1204 } 1205 } 1206 // The method is defined not within this dex file. We need a dex cache slot within the current 1207 // dex file or direct pointers. 1208 bool must_use_direct_pointers = false; 1209 if (target_method->dex_file == method->GetDeclaringClass()->GetDexCache()->GetDexFile()) { 1210 target_method->dex_method_index = method->GetDexMethodIndex(); 1211 } else { 1212 if (no_guarantee_of_dex_cache_entry) { 1213 StackHandleScope<1> hs(Thread::Current()); 1214 MethodHelper mh(hs.NewHandle(method)); 1215 // See if the method is also declared in this dex cache. 1216 uint32_t dex_method_idx = mh.FindDexMethodIndexInOtherDexFile( 1217 *target_method->dex_file, target_method->dex_method_index); 1218 if (dex_method_idx != DexFile::kDexNoIndex) { 1219 target_method->dex_method_index = dex_method_idx; 1220 } else { 1221 if (force_relocations && !use_dex_cache) { 1222 target_method->dex_method_index = method->GetDexMethodIndex(); 1223 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1224 } 1225 must_use_direct_pointers = true; 1226 } 1227 } 1228 } 1229 if (use_dex_cache) { 1230 if (must_use_direct_pointers) { 1231 // Fail. Test above showed the only safe dispatch was via the dex cache, however, the direct 1232 // pointers are required as the dex cache lacks an appropriate entry. 1233 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1234 } else { 1235 *type = sharp_type; 1236 } 1237 } else { 1238 bool method_in_image = 1239 Runtime::Current()->GetHeap()->FindSpaceFromObject(method, false)->IsImageSpace(); 1240 if (method_in_image || compiling_boot) { 1241 // We know we must be able to get to the method in the image, so use that pointer. 1242 CHECK(!method->IsAbstract()); 1243 *type = sharp_type; 1244 *direct_method = force_relocations ? -1 : reinterpret_cast<uintptr_t>(method); 1245 *direct_code = force_relocations ? -1 : compiler_->GetEntryPointOf(method); 1246 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1247 target_method->dex_method_index = method->GetDexMethodIndex(); 1248 } else if (!must_use_direct_pointers) { 1249 // Set the code and rely on the dex cache for the method. 1250 *type = sharp_type; 1251 if (force_relocations) { 1252 *direct_code = -1; 1253 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1254 target_method->dex_method_index = method->GetDexMethodIndex(); 1255 } else { 1256 *direct_code = compiler_->GetEntryPointOf(method); 1257 } 1258 } else { 1259 // Direct pointers were required but none were available. 1260 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1261 } 1262 } 1263} 1264 1265bool CompilerDriver::ComputeInvokeInfo(const DexCompilationUnit* mUnit, const uint32_t dex_pc, 1266 bool update_stats, bool enable_devirtualization, 1267 InvokeType* invoke_type, MethodReference* target_method, 1268 int* vtable_idx, uintptr_t* direct_code, 1269 uintptr_t* direct_method) { 1270 InvokeType orig_invoke_type = *invoke_type; 1271 int stats_flags = 0; 1272 ScopedObjectAccess soa(Thread::Current()); 1273 // Try to resolve the method and compiling method's class. 1274 mirror::ArtMethod* resolved_method; 1275 mirror::Class* referrer_class; 1276 StackHandleScope<3> hs(soa.Self()); 1277 Handle<mirror::DexCache> dex_cache( 1278 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1279 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 1280 soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1281 { 1282 uint32_t method_idx = target_method->dex_method_index; 1283 Handle<mirror::ArtMethod> resolved_method_handle(hs.NewHandle( 1284 ResolveMethod(soa, dex_cache, class_loader, mUnit, method_idx, orig_invoke_type))); 1285 referrer_class = (resolved_method_handle.Get() != nullptr) 1286 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader, mUnit) : nullptr; 1287 resolved_method = resolved_method_handle.Get(); 1288 } 1289 bool result = false; 1290 if (resolved_method != nullptr) { 1291 *vtable_idx = GetResolvedMethodVTableIndex(resolved_method, orig_invoke_type); 1292 1293 if (enable_devirtualization) { 1294 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1295 const MethodReference* devirt_target = mUnit->GetVerifiedMethod()->GetDevirtTarget(dex_pc); 1296 1297 stats_flags = IsFastInvoke( 1298 soa, dex_cache, class_loader, mUnit, referrer_class, resolved_method, 1299 invoke_type, target_method, devirt_target, direct_code, direct_method); 1300 result = stats_flags != 0; 1301 } else { 1302 // Devirtualization not enabled. Inline IsFastInvoke(), dropping the devirtualization parts. 1303 if (UNLIKELY(referrer_class == nullptr) || 1304 UNLIKELY(!referrer_class->CanAccessResolvedMethod(resolved_method->GetDeclaringClass(), 1305 resolved_method, dex_cache.Get(), 1306 target_method->dex_method_index)) || 1307 *invoke_type == kSuper) { 1308 // Slow path. (Without devirtualization, all super calls go slow path as well.) 1309 } else { 1310 // Sharpening failed so generate a regular resolved method dispatch. 1311 stats_flags = kFlagMethodResolved; 1312 GetCodeAndMethodForDirectCall(invoke_type, *invoke_type, false, referrer_class, resolved_method, 1313 &stats_flags, target_method, direct_code, direct_method); 1314 result = true; 1315 } 1316 } 1317 } 1318 if (!result) { 1319 // Conservative defaults. 1320 *vtable_idx = -1; 1321 *direct_code = 0u; 1322 *direct_method = 0u; 1323 } 1324 if (update_stats) { 1325 ProcessedInvoke(orig_invoke_type, stats_flags); 1326 } 1327 return result; 1328} 1329 1330const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1331 uint32_t method_idx) const { 1332 MethodReference ref(dex_file, method_idx); 1333 return verification_results_->GetVerifiedMethod(ref); 1334} 1335 1336bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1337 if (!compiler_options_->IsVerificationEnabled()) { 1338 // If we didn't verify, every cast has to be treated as non-safe. 1339 return false; 1340 } 1341 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1342 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1343 if (result) { 1344 stats_->SafeCast(); 1345 } else { 1346 stats_->NotASafeCast(); 1347 } 1348 return result; 1349} 1350 1351void CompilerDriver::AddCodePatch(const DexFile* dex_file, 1352 uint16_t referrer_class_def_idx, 1353 uint32_t referrer_method_idx, 1354 InvokeType referrer_invoke_type, 1355 uint32_t target_method_idx, 1356 const DexFile* target_dex_file, 1357 InvokeType target_invoke_type, 1358 size_t literal_offset) { 1359 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1360 code_to_patch_.push_back(new CallPatchInformation(dex_file, 1361 referrer_class_def_idx, 1362 referrer_method_idx, 1363 referrer_invoke_type, 1364 target_method_idx, 1365 target_dex_file, 1366 target_invoke_type, 1367 literal_offset)); 1368} 1369void CompilerDriver::AddRelativeCodePatch(const DexFile* dex_file, 1370 uint16_t referrer_class_def_idx, 1371 uint32_t referrer_method_idx, 1372 InvokeType referrer_invoke_type, 1373 uint32_t target_method_idx, 1374 const DexFile* target_dex_file, 1375 InvokeType target_invoke_type, 1376 size_t literal_offset, 1377 int32_t pc_relative_offset) { 1378 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1379 code_to_patch_.push_back(new RelativeCallPatchInformation(dex_file, 1380 referrer_class_def_idx, 1381 referrer_method_idx, 1382 referrer_invoke_type, 1383 target_method_idx, 1384 target_dex_file, 1385 target_invoke_type, 1386 literal_offset, 1387 pc_relative_offset)); 1388} 1389void CompilerDriver::AddMethodPatch(const DexFile* dex_file, 1390 uint16_t referrer_class_def_idx, 1391 uint32_t referrer_method_idx, 1392 InvokeType referrer_invoke_type, 1393 uint32_t target_method_idx, 1394 const DexFile* target_dex_file, 1395 InvokeType target_invoke_type, 1396 size_t literal_offset) { 1397 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1398 methods_to_patch_.push_back(new CallPatchInformation(dex_file, 1399 referrer_class_def_idx, 1400 referrer_method_idx, 1401 referrer_invoke_type, 1402 target_method_idx, 1403 target_dex_file, 1404 target_invoke_type, 1405 literal_offset)); 1406} 1407void CompilerDriver::AddClassPatch(const DexFile* dex_file, 1408 uint16_t referrer_class_def_idx, 1409 uint32_t referrer_method_idx, 1410 uint32_t target_type_idx, 1411 size_t literal_offset) { 1412 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1413 classes_to_patch_.push_back(new TypePatchInformation(dex_file, 1414 referrer_class_def_idx, 1415 referrer_method_idx, 1416 target_type_idx, 1417 literal_offset)); 1418} 1419void CompilerDriver::AddStringPatch(const DexFile* dex_file, 1420 uint16_t referrer_class_def_idx, 1421 uint32_t referrer_method_idx, 1422 uint32_t string_idx, 1423 size_t literal_offset) { 1424 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1425 strings_to_patch_.push_back(new StringPatchInformation(dex_file, 1426 referrer_class_def_idx, 1427 referrer_method_idx, 1428 string_idx, 1429 literal_offset)); 1430} 1431 1432class ParallelCompilationManager { 1433 public: 1434 typedef void Callback(const ParallelCompilationManager* manager, size_t index); 1435 1436 ParallelCompilationManager(ClassLinker* class_linker, 1437 jobject class_loader, 1438 CompilerDriver* compiler, 1439 const DexFile* dex_file, 1440 const std::vector<const DexFile*>& dex_files, 1441 ThreadPool* thread_pool) 1442 : index_(0), 1443 class_linker_(class_linker), 1444 class_loader_(class_loader), 1445 compiler_(compiler), 1446 dex_file_(dex_file), 1447 dex_files_(dex_files), 1448 thread_pool_(thread_pool) {} 1449 1450 ClassLinker* GetClassLinker() const { 1451 CHECK(class_linker_ != nullptr); 1452 return class_linker_; 1453 } 1454 1455 jobject GetClassLoader() const { 1456 return class_loader_; 1457 } 1458 1459 CompilerDriver* GetCompiler() const { 1460 CHECK(compiler_ != nullptr); 1461 return compiler_; 1462 } 1463 1464 const DexFile* GetDexFile() const { 1465 CHECK(dex_file_ != nullptr); 1466 return dex_file_; 1467 } 1468 1469 const std::vector<const DexFile*>& GetDexFiles() const { 1470 return dex_files_; 1471 } 1472 1473 void ForAll(size_t begin, size_t end, Callback callback, size_t work_units) { 1474 Thread* self = Thread::Current(); 1475 self->AssertNoPendingException(); 1476 CHECK_GT(work_units, 0U); 1477 1478 index_.StoreRelaxed(begin); 1479 for (size_t i = 0; i < work_units; ++i) { 1480 thread_pool_->AddTask(self, new ForAllClosure(this, end, callback)); 1481 } 1482 thread_pool_->StartWorkers(self); 1483 1484 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1485 // thread destructor's called below perform join). 1486 CHECK_NE(self->GetState(), kRunnable); 1487 1488 // Wait for all the worker threads to finish. 1489 thread_pool_->Wait(self, true, false); 1490 } 1491 1492 size_t NextIndex() { 1493 return index_.FetchAndAddSequentiallyConsistent(1); 1494 } 1495 1496 private: 1497 class ForAllClosure : public Task { 1498 public: 1499 ForAllClosure(ParallelCompilationManager* manager, size_t end, Callback* callback) 1500 : manager_(manager), 1501 end_(end), 1502 callback_(callback) {} 1503 1504 virtual void Run(Thread* self) { 1505 while (true) { 1506 const size_t index = manager_->NextIndex(); 1507 if (UNLIKELY(index >= end_)) { 1508 break; 1509 } 1510 callback_(manager_, index); 1511 self->AssertNoPendingException(); 1512 } 1513 } 1514 1515 virtual void Finalize() { 1516 delete this; 1517 } 1518 1519 private: 1520 ParallelCompilationManager* const manager_; 1521 const size_t end_; 1522 Callback* const callback_; 1523 }; 1524 1525 AtomicInteger index_; 1526 ClassLinker* const class_linker_; 1527 const jobject class_loader_; 1528 CompilerDriver* const compiler_; 1529 const DexFile* const dex_file_; 1530 const std::vector<const DexFile*>& dex_files_; 1531 ThreadPool* const thread_pool_; 1532 1533 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1534}; 1535 1536// A fast version of SkipClass above if the class pointer is available 1537// that avoids the expensive FindInClassPath search. 1538static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1539 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1540 DCHECK(klass != nullptr); 1541 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1542 if (&dex_file != &original_dex_file) { 1543 if (class_loader == nullptr) { 1544 LOG(WARNING) << "Skipping class " << PrettyDescriptor(klass) << " from " 1545 << dex_file.GetLocation() << " previously found in " 1546 << original_dex_file.GetLocation(); 1547 } 1548 return true; 1549 } 1550 return false; 1551} 1552 1553static void CheckAndClearResolveException(Thread* self) 1554 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1555 CHECK(self->IsExceptionPending()); 1556 mirror::Throwable* exception = self->GetException(nullptr); 1557 std::string temp; 1558 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1559 const char* expected_exceptions[] = { 1560 "Ljava/lang/IllegalAccessError;", 1561 "Ljava/lang/IncompatibleClassChangeError;", 1562 "Ljava/lang/InstantiationError;", 1563 "Ljava/lang/LinkageError;", 1564 "Ljava/lang/NoClassDefFoundError;", 1565 "Ljava/lang/NoSuchFieldError;", 1566 "Ljava/lang/NoSuchMethodError;" 1567 }; 1568 bool found = false; 1569 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1570 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1571 found = true; 1572 } 1573 } 1574 if (!found) { 1575 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1576 } 1577 self->ClearException(); 1578} 1579 1580static void ResolveClassFieldsAndMethods(const ParallelCompilationManager* manager, 1581 size_t class_def_index) 1582 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1583 ATRACE_CALL(); 1584 Thread* self = Thread::Current(); 1585 jobject jclass_loader = manager->GetClassLoader(); 1586 const DexFile& dex_file = *manager->GetDexFile(); 1587 ClassLinker* class_linker = manager->GetClassLinker(); 1588 1589 // If an instance field is final then we need to have a barrier on the return, static final 1590 // fields are assigned within the lock held for class initialization. Conservatively assume 1591 // constructor barriers are always required. 1592 bool requires_constructor_barrier = true; 1593 1594 // Method and Field are the worst. We can't resolve without either 1595 // context from the code use (to disambiguate virtual vs direct 1596 // method and instance vs static field) or from class 1597 // definitions. While the compiler will resolve what it can as it 1598 // needs it, here we try to resolve fields and methods used in class 1599 // definitions, since many of them many never be referenced by 1600 // generated code. 1601 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1602 ScopedObjectAccess soa(self); 1603 StackHandleScope<2> hs(soa.Self()); 1604 Handle<mirror::ClassLoader> class_loader( 1605 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1606 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1607 // Resolve the class. 1608 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1609 class_loader); 1610 bool resolve_fields_and_methods; 1611 if (klass == nullptr) { 1612 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1613 // attempt to resolve methods and fields when there is no declaring class. 1614 CheckAndClearResolveException(soa.Self()); 1615 resolve_fields_and_methods = false; 1616 } else { 1617 // We successfully resolved a class, should we skip it? 1618 if (SkipClass(jclass_loader, dex_file, klass)) { 1619 return; 1620 } 1621 // We want to resolve the methods and fields eagerly. 1622 resolve_fields_and_methods = true; 1623 } 1624 // Note the class_data pointer advances through the headers, 1625 // static fields, instance fields, direct methods, and virtual 1626 // methods. 1627 const byte* class_data = dex_file.GetClassData(class_def); 1628 if (class_data == nullptr) { 1629 // Empty class such as a marker interface. 1630 requires_constructor_barrier = false; 1631 } else { 1632 ClassDataItemIterator it(dex_file, class_data); 1633 while (it.HasNextStaticField()) { 1634 if (resolve_fields_and_methods) { 1635 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1636 dex_cache, class_loader, true); 1637 if (field == nullptr) { 1638 CheckAndClearResolveException(soa.Self()); 1639 } 1640 } 1641 it.Next(); 1642 } 1643 // We require a constructor barrier if there are final instance fields. 1644 requires_constructor_barrier = false; 1645 while (it.HasNextInstanceField()) { 1646 if (it.MemberIsFinal()) { 1647 requires_constructor_barrier = true; 1648 } 1649 if (resolve_fields_and_methods) { 1650 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1651 dex_cache, class_loader, false); 1652 if (field == nullptr) { 1653 CheckAndClearResolveException(soa.Self()); 1654 } 1655 } 1656 it.Next(); 1657 } 1658 if (resolve_fields_and_methods) { 1659 while (it.HasNextDirectMethod()) { 1660 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1661 dex_cache, class_loader, 1662 NullHandle<mirror::ArtMethod>(), 1663 it.GetMethodInvokeType(class_def)); 1664 if (method == nullptr) { 1665 CheckAndClearResolveException(soa.Self()); 1666 } 1667 it.Next(); 1668 } 1669 while (it.HasNextVirtualMethod()) { 1670 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1671 dex_cache, class_loader, 1672 NullHandle<mirror::ArtMethod>(), 1673 it.GetMethodInvokeType(class_def)); 1674 if (method == nullptr) { 1675 CheckAndClearResolveException(soa.Self()); 1676 } 1677 it.Next(); 1678 } 1679 DCHECK(!it.HasNext()); 1680 } 1681 } 1682 if (requires_constructor_barrier) { 1683 manager->GetCompiler()->AddRequiresConstructorBarrier(self, &dex_file, class_def_index); 1684 } 1685} 1686 1687static void ResolveType(const ParallelCompilationManager* manager, size_t type_idx) 1688 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1689 // Class derived values are more complicated, they require the linker and loader. 1690 ScopedObjectAccess soa(Thread::Current()); 1691 ClassLinker* class_linker = manager->GetClassLinker(); 1692 const DexFile& dex_file = *manager->GetDexFile(); 1693 StackHandleScope<2> hs(soa.Self()); 1694 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1695 Handle<mirror::ClassLoader> class_loader( 1696 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(manager->GetClassLoader()))); 1697 mirror::Class* klass = class_linker->ResolveType(dex_file, type_idx, dex_cache, class_loader); 1698 1699 if (klass == nullptr) { 1700 CHECK(soa.Self()->IsExceptionPending()); 1701 mirror::Throwable* exception = soa.Self()->GetException(nullptr); 1702 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1703 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 1704 // There's little point continuing compilation if the heap is exhausted. 1705 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1706 } 1707 soa.Self()->ClearException(); 1708 } 1709} 1710 1711void CompilerDriver::ResolveDexFile(jobject class_loader, const DexFile& dex_file, 1712 const std::vector<const DexFile*>& dex_files, 1713 ThreadPool* thread_pool, TimingLogger* timings) { 1714 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1715 1716 // TODO: we could resolve strings here, although the string table is largely filled with class 1717 // and method names. 1718 1719 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1720 thread_pool); 1721 if (IsImage()) { 1722 // For images we resolve all types, such as array, whereas for applications just those with 1723 // classdefs are resolved by ResolveClassFieldsAndMethods. 1724 TimingLogger::ScopedTiming t("Resolve Types", timings); 1725 context.ForAll(0, dex_file.NumTypeIds(), ResolveType, thread_count_); 1726 } 1727 1728 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 1729 context.ForAll(0, dex_file.NumClassDefs(), ResolveClassFieldsAndMethods, thread_count_); 1730} 1731 1732void CompilerDriver::SetVerified(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1733 ThreadPool* thread_pool, TimingLogger* timings) { 1734 for (size_t i = 0; i != dex_files.size(); ++i) { 1735 const DexFile* dex_file = dex_files[i]; 1736 CHECK(dex_file != nullptr); 1737 SetVerifiedDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1738 } 1739} 1740 1741void CompilerDriver::Verify(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1742 ThreadPool* thread_pool, TimingLogger* timings) { 1743 for (size_t i = 0; i != dex_files.size(); ++i) { 1744 const DexFile* dex_file = dex_files[i]; 1745 CHECK(dex_file != nullptr); 1746 VerifyDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1747 } 1748} 1749 1750static void VerifyClass(const ParallelCompilationManager* manager, size_t class_def_index) 1751 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1752 ATRACE_CALL(); 1753 ScopedObjectAccess soa(Thread::Current()); 1754 const DexFile& dex_file = *manager->GetDexFile(); 1755 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1756 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1757 ClassLinker* class_linker = manager->GetClassLinker(); 1758 jobject jclass_loader = manager->GetClassLoader(); 1759 StackHandleScope<3> hs(soa.Self()); 1760 Handle<mirror::ClassLoader> class_loader( 1761 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1762 Handle<mirror::Class> klass( 1763 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1764 if (klass.Get() == nullptr) { 1765 CHECK(soa.Self()->IsExceptionPending()); 1766 soa.Self()->ClearException(); 1767 1768 /* 1769 * At compile time, we can still structurally verify the class even if FindClass fails. 1770 * This is to ensure the class is structurally sound for compilation. An unsound class 1771 * will be rejected by the verifier and later skipped during compilation in the compiler. 1772 */ 1773 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1774 std::string error_msg; 1775 if (verifier::MethodVerifier::VerifyClass(&dex_file, dex_cache, class_loader, &class_def, true, 1776 &error_msg) == 1777 verifier::MethodVerifier::kHardFailure) { 1778 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 1779 << " because: " << error_msg; 1780 } 1781 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 1782 CHECK(klass->IsResolved()) << PrettyClass(klass.Get()); 1783 class_linker->VerifyClass(klass); 1784 1785 if (klass->IsErroneous()) { 1786 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 1787 CHECK(soa.Self()->IsExceptionPending()); 1788 soa.Self()->ClearException(); 1789 } 1790 1791 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 1792 << PrettyDescriptor(klass.Get()) << ": state=" << klass->GetStatus(); 1793 } 1794 soa.Self()->AssertNoPendingException(); 1795} 1796 1797void CompilerDriver::VerifyDexFile(jobject class_loader, const DexFile& dex_file, 1798 const std::vector<const DexFile*>& dex_files, 1799 ThreadPool* thread_pool, TimingLogger* timings) { 1800 TimingLogger::ScopedTiming t("Verify Dex File", timings); 1801 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1802 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1803 thread_pool); 1804 context.ForAll(0, dex_file.NumClassDefs(), VerifyClass, thread_count_); 1805} 1806 1807static void SetVerifiedClass(const ParallelCompilationManager* manager, size_t class_def_index) 1808 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1809 ATRACE_CALL(); 1810 ScopedObjectAccess soa(Thread::Current()); 1811 const DexFile& dex_file = *manager->GetDexFile(); 1812 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1813 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1814 ClassLinker* class_linker = manager->GetClassLinker(); 1815 jobject jclass_loader = manager->GetClassLoader(); 1816 StackHandleScope<3> hs(soa.Self()); 1817 Handle<mirror::ClassLoader> class_loader( 1818 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1819 Handle<mirror::Class> klass( 1820 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1821 // Class might have failed resolution. Then don't set it to verified. 1822 if (klass.Get() != nullptr) { 1823 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 1824 // very wrong. 1825 if (klass->IsResolved()) { 1826 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 1827 ObjectLock<mirror::Class> lock(soa.Self(), klass); 1828 klass->SetStatus(mirror::Class::kStatusVerified, soa.Self()); 1829 } 1830 // Record the final class status if necessary. 1831 ClassReference ref(manager->GetDexFile(), class_def_index); 1832 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1833 } 1834 } else { 1835 Thread* self = soa.Self(); 1836 DCHECK(self->IsExceptionPending()); 1837 self->ClearException(); 1838 } 1839} 1840 1841void CompilerDriver::SetVerifiedDexFile(jobject class_loader, const DexFile& dex_file, 1842 const std::vector<const DexFile*>& dex_files, 1843 ThreadPool* thread_pool, TimingLogger* timings) { 1844 TimingLogger::ScopedTiming t("Verify Dex File", timings); 1845 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1846 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1847 thread_pool); 1848 context.ForAll(0, dex_file.NumClassDefs(), SetVerifiedClass, thread_count_); 1849} 1850 1851static void InitializeClass(const ParallelCompilationManager* manager, size_t class_def_index) 1852 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1853 ATRACE_CALL(); 1854 jobject jclass_loader = manager->GetClassLoader(); 1855 const DexFile& dex_file = *manager->GetDexFile(); 1856 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1857 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 1858 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 1859 1860 ScopedObjectAccess soa(Thread::Current()); 1861 StackHandleScope<3> hs(soa.Self()); 1862 Handle<mirror::ClassLoader> class_loader( 1863 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1864 Handle<mirror::Class> klass( 1865 hs.NewHandle(manager->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 1866 1867 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 1868 // Only try to initialize classes that were successfully verified. 1869 if (klass->IsVerified()) { 1870 // Attempt to initialize the class but bail if we either need to initialize the super-class 1871 // or static fields. 1872 manager->GetClassLinker()->EnsureInitialized(klass, false, false); 1873 if (!klass->IsInitialized()) { 1874 // We don't want non-trivial class initialization occurring on multiple threads due to 1875 // deadlock problems. For example, a parent class is initialized (holding its lock) that 1876 // refers to a sub-class in its static/class initializer causing it to try to acquire the 1877 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 1878 // after first initializing its parents, whose locks are acquired. This leads to a 1879 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 1880 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 1881 // than use a special Object for the purpose we use the Class of java.lang.Class. 1882 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 1883 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 1884 // Attempt to initialize allowing initialization of parent classes but still not static 1885 // fields. 1886 manager->GetClassLinker()->EnsureInitialized(klass, false, true); 1887 if (!klass->IsInitialized()) { 1888 // We need to initialize static fields, we only do this for image classes that aren't 1889 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 1890 bool can_init_static_fields = manager->GetCompiler()->IsImage() && 1891 manager->GetCompiler()->IsImageClass(descriptor) && 1892 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 1893 if (can_init_static_fields) { 1894 VLOG(compiler) << "Initializing: " << descriptor; 1895 // TODO multithreading support. We should ensure the current compilation thread has 1896 // exclusive access to the runtime and the transaction. To achieve this, we could use 1897 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 1898 // checks in Thread::AssertThreadSuspensionIsAllowable. 1899 Runtime* const runtime = Runtime::Current(); 1900 Transaction transaction; 1901 1902 // Run the class initializer in transaction mode. 1903 runtime->EnterTransactionMode(&transaction); 1904 const mirror::Class::Status old_status = klass->GetStatus(); 1905 bool success = manager->GetClassLinker()->EnsureInitialized(klass, true, true); 1906 // TODO we detach transaction from runtime to indicate we quit the transactional 1907 // mode which prevents the GC from visiting objects modified during the transaction. 1908 // Ensure GC is not run so don't access freed objects when aborting transaction. 1909 const char* old_casue = soa.Self()->StartAssertNoThreadSuspension("Transaction end"); 1910 runtime->ExitTransactionMode(); 1911 1912 if (!success) { 1913 CHECK(soa.Self()->IsExceptionPending()); 1914 ThrowLocation throw_location; 1915 mirror::Throwable* exception = soa.Self()->GetException(&throw_location); 1916 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 1917 << exception->Dump(); 1918 soa.Self()->ClearException(); 1919 transaction.Abort(); 1920 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 1921 } 1922 soa.Self()->EndAssertNoThreadSuspension(old_casue); 1923 } 1924 } 1925 soa.Self()->AssertNoPendingException(); 1926 } 1927 } 1928 // Record the final class status if necessary. 1929 ClassReference ref(manager->GetDexFile(), class_def_index); 1930 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1931 } 1932 // Clear any class not found or verification exceptions. 1933 soa.Self()->ClearException(); 1934} 1935 1936void CompilerDriver::InitializeClasses(jobject jni_class_loader, const DexFile& dex_file, 1937 const std::vector<const DexFile*>& dex_files, 1938 ThreadPool* thread_pool, TimingLogger* timings) { 1939 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 1940 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1941 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 1942 thread_pool); 1943 size_t thread_count; 1944 if (IsImage()) { 1945 // TODO: remove this when transactional mode supports multithreading. 1946 thread_count = 1U; 1947 } else { 1948 thread_count = thread_count_; 1949 } 1950 context.ForAll(0, dex_file.NumClassDefs(), InitializeClass, thread_count); 1951} 1952 1953void CompilerDriver::InitializeClasses(jobject class_loader, 1954 const std::vector<const DexFile*>& dex_files, 1955 ThreadPool* thread_pool, TimingLogger* timings) { 1956 for (size_t i = 0; i != dex_files.size(); ++i) { 1957 const DexFile* dex_file = dex_files[i]; 1958 CHECK(dex_file != nullptr); 1959 InitializeClasses(class_loader, *dex_file, dex_files, thread_pool, timings); 1960 } 1961 if (IsImage()) { 1962 // Prune garbage objects created during aborted transactions. 1963 Runtime::Current()->GetHeap()->CollectGarbage(true); 1964 } 1965} 1966 1967void CompilerDriver::Compile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1968 ThreadPool* thread_pool, TimingLogger* timings) { 1969 for (size_t i = 0; i != dex_files.size(); ++i) { 1970 const DexFile* dex_file = dex_files[i]; 1971 CHECK(dex_file != nullptr); 1972 CompileDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1973 } 1974 VLOG(compiler) << "Compile: " << GetMemoryUsageString(); 1975} 1976 1977void CompilerDriver::CompileClass(const ParallelCompilationManager* manager, size_t class_def_index) { 1978 ATRACE_CALL(); 1979 const DexFile& dex_file = *manager->GetDexFile(); 1980 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1981 ClassLinker* class_linker = manager->GetClassLinker(); 1982 jobject jclass_loader = manager->GetClassLoader(); 1983 { 1984 // Use a scoped object access to perform to the quick SkipClass check. 1985 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1986 ScopedObjectAccess soa(Thread::Current()); 1987 StackHandleScope<3> hs(soa.Self()); 1988 Handle<mirror::ClassLoader> class_loader( 1989 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1990 Handle<mirror::Class> klass( 1991 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1992 if (klass.Get() == nullptr) { 1993 CHECK(soa.Self()->IsExceptionPending()); 1994 soa.Self()->ClearException(); 1995 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 1996 return; 1997 } 1998 } 1999 ClassReference ref(&dex_file, class_def_index); 2000 // Skip compiling classes with generic verifier failures since they will still fail at runtime 2001 if (manager->GetCompiler()->verification_results_->IsClassRejected(ref)) { 2002 return; 2003 } 2004 const byte* class_data = dex_file.GetClassData(class_def); 2005 if (class_data == nullptr) { 2006 // empty class, probably a marker interface 2007 return; 2008 } 2009 2010 // Can we run DEX-to-DEX compiler on this class ? 2011 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 2012 { 2013 ScopedObjectAccess soa(Thread::Current()); 2014 StackHandleScope<1> hs(soa.Self()); 2015 Handle<mirror::ClassLoader> class_loader( 2016 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2017 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(soa.Self(), class_loader, dex_file, 2018 class_def); 2019 } 2020 ClassDataItemIterator it(dex_file, class_data); 2021 // Skip fields 2022 while (it.HasNextStaticField()) { 2023 it.Next(); 2024 } 2025 while (it.HasNextInstanceField()) { 2026 it.Next(); 2027 } 2028 CompilerDriver* driver = manager->GetCompiler(); 2029 2030 bool compilation_enabled = driver->IsClassToCompile( 2031 dex_file.StringByTypeIdx(class_def.class_idx_)); 2032 2033 // Compile direct methods 2034 int64_t previous_direct_method_idx = -1; 2035 while (it.HasNextDirectMethod()) { 2036 uint32_t method_idx = it.GetMemberIndex(); 2037 if (method_idx == previous_direct_method_idx) { 2038 // smali can create dex files with two encoded_methods sharing the same method_idx 2039 // http://code.google.com/p/smali/issues/detail?id=119 2040 it.Next(); 2041 continue; 2042 } 2043 previous_direct_method_idx = method_idx; 2044 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2045 it.GetMethodInvokeType(class_def), class_def_index, 2046 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2047 compilation_enabled); 2048 it.Next(); 2049 } 2050 // Compile virtual methods 2051 int64_t previous_virtual_method_idx = -1; 2052 while (it.HasNextVirtualMethod()) { 2053 uint32_t method_idx = it.GetMemberIndex(); 2054 if (method_idx == previous_virtual_method_idx) { 2055 // smali can create dex files with two encoded_methods sharing the same method_idx 2056 // http://code.google.com/p/smali/issues/detail?id=119 2057 it.Next(); 2058 continue; 2059 } 2060 previous_virtual_method_idx = method_idx; 2061 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2062 it.GetMethodInvokeType(class_def), class_def_index, 2063 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2064 compilation_enabled); 2065 it.Next(); 2066 } 2067 DCHECK(!it.HasNext()); 2068} 2069 2070void CompilerDriver::CompileDexFile(jobject class_loader, const DexFile& dex_file, 2071 const std::vector<const DexFile*>& dex_files, 2072 ThreadPool* thread_pool, TimingLogger* timings) { 2073 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2074 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2075 &dex_file, dex_files, thread_pool); 2076 context.ForAll(0, dex_file.NumClassDefs(), CompilerDriver::CompileClass, thread_count_); 2077} 2078 2079void CompilerDriver::CompileMethod(const DexFile::CodeItem* code_item, uint32_t access_flags, 2080 InvokeType invoke_type, uint16_t class_def_idx, 2081 uint32_t method_idx, jobject class_loader, 2082 const DexFile& dex_file, 2083 DexToDexCompilationLevel dex_to_dex_compilation_level, 2084 bool compilation_enabled) { 2085 CompiledMethod* compiled_method = nullptr; 2086 uint64_t start_ns = kTimeCompileMethod ? NanoTime() : 0; 2087 MethodReference method_ref(&dex_file, method_idx); 2088 2089 if ((access_flags & kAccNative) != 0) { 2090 // Are we interpreting only and have support for generic JNI down calls? 2091 if (!compiler_options_->IsCompilationEnabled() && 2092 (instruction_set_ == kX86_64 || instruction_set_ == kArm64)) { 2093 // Leaving this empty will trigger the generic JNI version 2094 } else { 2095 compiled_method = compiler_->JniCompile(access_flags, method_idx, dex_file); 2096 CHECK(compiled_method != nullptr); 2097 } 2098 } else if ((access_flags & kAccAbstract) != 0) { 2099 } else { 2100 bool has_verified_method = verification_results_->GetVerifiedMethod(method_ref) != nullptr; 2101 bool compile = compilation_enabled && 2102 // Basic checks, e.g., not <clinit>. 2103 verification_results_->IsCandidateForCompilation(method_ref, access_flags) && 2104 // Did not fail to create VerifiedMethod metadata. 2105 has_verified_method; 2106 if (compile) { 2107 // NOTE: if compiler declines to compile this method, it will return nullptr. 2108 compiled_method = compiler_->Compile(code_item, access_flags, invoke_type, class_def_idx, 2109 method_idx, class_loader, dex_file); 2110 } 2111 if (compiled_method == nullptr && dex_to_dex_compilation_level != kDontDexToDexCompile) { 2112 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 2113 // Do not optimize if a VerifiedMethod is missing. SafeCast elision, for example, relies on 2114 // it. 2115 (*dex_to_dex_compiler_)(*this, code_item, access_flags, 2116 invoke_type, class_def_idx, 2117 method_idx, class_loader, dex_file, 2118 has_verified_method ? dex_to_dex_compilation_level : kRequired); 2119 } 2120 } 2121 if (kTimeCompileMethod) { 2122 uint64_t duration_ns = NanoTime() - start_ns; 2123 if (duration_ns > MsToNs(compiler_->GetMaximumCompilationTimeBeforeWarning())) { 2124 LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) 2125 << " took " << PrettyDuration(duration_ns); 2126 } 2127 } 2128 2129 Thread* self = Thread::Current(); 2130 if (compiled_method != nullptr) { 2131 DCHECK(GetCompiledMethod(method_ref) == nullptr) << PrettyMethod(method_idx, dex_file); 2132 { 2133 MutexLock mu(self, compiled_methods_lock_); 2134 compiled_methods_.Put(method_ref, compiled_method); 2135 } 2136 DCHECK(GetCompiledMethod(method_ref) != nullptr) << PrettyMethod(method_idx, dex_file); 2137 } 2138 2139 // Done compiling, delete the verified method to reduce native memory usage. 2140 verification_results_->RemoveVerifiedMethod(method_ref); 2141 2142 if (self->IsExceptionPending()) { 2143 ScopedObjectAccess soa(self); 2144 LOG(FATAL) << "Unexpected exception compiling: " << PrettyMethod(method_idx, dex_file) << "\n" 2145 << self->GetException(nullptr)->Dump(); 2146 } 2147} 2148 2149CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2150 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2151 ClassTable::const_iterator it = compiled_classes_.find(ref); 2152 if (it == compiled_classes_.end()) { 2153 return nullptr; 2154 } 2155 CHECK(it->second != nullptr); 2156 return it->second; 2157} 2158 2159void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2160 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2161 auto it = compiled_classes_.find(ref); 2162 if (it == compiled_classes_.end() || it->second->GetStatus() != status) { 2163 // An entry doesn't exist or the status is lower than the new status. 2164 if (it != compiled_classes_.end()) { 2165 CHECK_GT(status, it->second->GetStatus()); 2166 delete it->second; 2167 } 2168 switch (status) { 2169 case mirror::Class::kStatusNotReady: 2170 case mirror::Class::kStatusError: 2171 case mirror::Class::kStatusRetryVerificationAtRuntime: 2172 case mirror::Class::kStatusVerified: 2173 case mirror::Class::kStatusInitialized: 2174 break; // Expected states. 2175 default: 2176 LOG(FATAL) << "Unexpected class status for class " 2177 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2178 << " of " << status; 2179 } 2180 CompiledClass* compiled_class = new CompiledClass(status); 2181 compiled_classes_.Overwrite(ref, compiled_class); 2182 } 2183} 2184 2185CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2186 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2187 MethodTable::const_iterator it = compiled_methods_.find(ref); 2188 if (it == compiled_methods_.end()) { 2189 return nullptr; 2190 } 2191 CHECK(it->second != nullptr); 2192 return it->second; 2193} 2194 2195void CompilerDriver::AddRequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2196 uint16_t class_def_index) { 2197 WriterMutexLock mu(self, freezing_constructor_lock_); 2198 freezing_constructor_classes_.insert(ClassReference(dex_file, class_def_index)); 2199} 2200 2201bool CompilerDriver::RequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2202 uint16_t class_def_index) { 2203 ReaderMutexLock mu(self, freezing_constructor_lock_); 2204 return freezing_constructor_classes_.count(ClassReference(dex_file, class_def_index)) != 0; 2205} 2206 2207bool CompilerDriver::WriteElf(const std::string& android_root, 2208 bool is_host, 2209 const std::vector<const art::DexFile*>& dex_files, 2210 OatWriter* oat_writer, 2211 art::File* file) 2212 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 2213 return compiler_->WriteElf(file, oat_writer, dex_files, android_root, is_host); 2214} 2215void CompilerDriver::InstructionSetToLLVMTarget(InstructionSet instruction_set, 2216 std::string* target_triple, 2217 std::string* target_cpu, 2218 std::string* target_attr) { 2219 switch (instruction_set) { 2220 case kThumb2: 2221 *target_triple = "thumb-none-linux-gnueabi"; 2222 *target_cpu = "cortex-a9"; 2223 *target_attr = "+thumb2,+neon,+neonfp,+vfp3,+db"; 2224 break; 2225 2226 case kArm: 2227 *target_triple = "armv7-none-linux-gnueabi"; 2228 // TODO: Fix for Nexus S. 2229 *target_cpu = "cortex-a9"; 2230 // TODO: Fix for Xoom. 2231 *target_attr = "+v7,+neon,+neonfp,+vfp3,+db"; 2232 break; 2233 2234 case kX86: 2235 *target_triple = "i386-pc-linux-gnu"; 2236 *target_attr = ""; 2237 break; 2238 2239 case kX86_64: 2240 *target_triple = "x86_64-pc-linux-gnu"; 2241 *target_attr = ""; 2242 break; 2243 2244 case kMips: 2245 *target_triple = "mipsel-unknown-linux"; 2246 *target_attr = "mips32r2"; 2247 break; 2248 2249 default: 2250 LOG(FATAL) << "Unknown instruction set: " << instruction_set; 2251 } 2252 } 2253 2254bool CompilerDriver::SkipCompilation(const std::string& method_name) { 2255 if (!profile_present_) { 2256 return false; 2257 } 2258 // First find the method in the profile file. 2259 ProfileFile::ProfileData data; 2260 if (!profile_file_.GetProfileData(&data, method_name)) { 2261 // Not in profile, no information can be determined. 2262 if (kIsDebugBuild) { 2263 VLOG(compiler) << "not compiling " << method_name << " because it's not in the profile"; 2264 } 2265 return true; 2266 } 2267 2268 // Methods that comprise top_k_threshold % of the total samples will be compiled. 2269 // Compare against the start of the topK percentage bucket just in case the threshold 2270 // falls inside a bucket. 2271 bool compile = data.GetTopKUsedPercentage() - data.GetUsedPercent() 2272 <= compiler_options_->GetTopKProfileThreshold(); 2273 if (kIsDebugBuild) { 2274 if (compile) { 2275 LOG(INFO) << "compiling method " << method_name << " because its usage is part of top " 2276 << data.GetTopKUsedPercentage() << "% with a percent of " << data.GetUsedPercent() << "%" 2277 << " (topKThreshold=" << compiler_options_->GetTopKProfileThreshold() << ")"; 2278 } else { 2279 VLOG(compiler) << "not compiling method " << method_name 2280 << " because it's not part of leading " << compiler_options_->GetTopKProfileThreshold() 2281 << "% samples)"; 2282 } 2283 } 2284 return !compile; 2285} 2286 2287std::string CompilerDriver::GetMemoryUsageString() const { 2288 std::ostringstream oss; 2289 const ArenaPool* arena_pool = GetArenaPool(); 2290 gc::Heap* heap = Runtime::Current()->GetHeap(); 2291 oss << "arena alloc=" << PrettySize(arena_pool->GetBytesAllocated()); 2292 oss << " java alloc=" << PrettySize(heap->GetBytesAllocated()); 2293#ifdef HAVE_MALLOC_H 2294 struct mallinfo info = mallinfo(); 2295 const size_t allocated_space = static_cast<size_t>(info.uordblks); 2296 const size_t free_space = static_cast<size_t>(info.fordblks); 2297 oss << " native alloc=" << PrettySize(allocated_space) << " free=" 2298 << PrettySize(free_space); 2299#endif 2300 return oss.str(); 2301} 2302 2303} // namespace art 2304