compiler_driver.cc revision 807140048f82a2b87ee5bcf337f23b6a3d1d5269
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#include "base/stl_util.h" 26#include "base/timing_logger.h" 27#include "class_linker.h" 28#include "compiled_class.h" 29#include "compiler.h" 30#include "compiler_driver-inl.h" 31#include "dex_compilation_unit.h" 32#include "dex_file-inl.h" 33#include "dex/verification_results.h" 34#include "dex/verified_method.h" 35#include "dex/quick/dex_file_method_inliner.h" 36#include "driver/compiler_options.h" 37#include "jni_internal.h" 38#include "object_lock.h" 39#include "profiler.h" 40#include "runtime.h" 41#include "gc/accounting/card_table-inl.h" 42#include "gc/accounting/heap_bitmap.h" 43#include "gc/space/space.h" 44#include "mirror/art_field-inl.h" 45#include "mirror/art_method-inl.h" 46#include "mirror/class_loader.h" 47#include "mirror/class-inl.h" 48#include "mirror/dex_cache-inl.h" 49#include "mirror/object-inl.h" 50#include "mirror/object_array-inl.h" 51#include "mirror/throwable.h" 52#include "scoped_thread_state_change.h" 53#include "ScopedLocalRef.h" 54#include "handle_scope-inl.h" 55#include "thread.h" 56#include "thread_pool.h" 57#include "trampolines/trampoline_compiler.h" 58#include "transaction.h" 59#include "verifier/method_verifier.h" 60#include "verifier/method_verifier-inl.h" 61 62namespace art { 63 64static constexpr bool kTimeCompileMethod = !kIsDebugBuild; 65 66static double Percentage(size_t x, size_t y) { 67 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 68} 69 70static void DumpStat(size_t x, size_t y, const char* str) { 71 if (x == 0 && y == 0) { 72 return; 73 } 74 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 75} 76 77class CompilerDriver::AOTCompilationStats { 78 public: 79 AOTCompilationStats() 80 : stats_lock_("AOT compilation statistics lock"), 81 types_in_dex_cache_(0), types_not_in_dex_cache_(0), 82 strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), 83 resolved_types_(0), unresolved_types_(0), 84 resolved_instance_fields_(0), unresolved_instance_fields_(0), 85 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 86 type_based_devirtualization_(0), 87 safe_casts_(0), not_safe_casts_(0) { 88 for (size_t i = 0; i <= kMaxInvokeType; i++) { 89 resolved_methods_[i] = 0; 90 unresolved_methods_[i] = 0; 91 virtual_made_direct_[i] = 0; 92 direct_calls_to_boot_[i] = 0; 93 direct_methods_to_boot_[i] = 0; 94 } 95 } 96 97 void Dump() { 98 DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); 99 DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); 100 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 101 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 102 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 103 "static fields resolved"); 104 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 105 "static fields local to a class"); 106 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 107 // Note, the code below subtracts the stat value so that when added to the stat value we have 108 // 100% of samples. TODO: clean this up. 109 DumpStat(type_based_devirtualization_, 110 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 111 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 112 type_based_devirtualization_, 113 "virtual/interface calls made direct based on type information"); 114 115 for (size_t i = 0; i <= kMaxInvokeType; i++) { 116 std::ostringstream oss; 117 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 118 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 119 if (virtual_made_direct_[i] > 0) { 120 std::ostringstream oss2; 121 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 122 DumpStat(virtual_made_direct_[i], 123 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 124 oss2.str().c_str()); 125 } 126 if (direct_calls_to_boot_[i] > 0) { 127 std::ostringstream oss2; 128 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 129 DumpStat(direct_calls_to_boot_[i], 130 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 131 oss2.str().c_str()); 132 } 133 if (direct_methods_to_boot_[i] > 0) { 134 std::ostringstream oss2; 135 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 136 DumpStat(direct_methods_to_boot_[i], 137 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 138 oss2.str().c_str()); 139 } 140 } 141 } 142 143// Allow lossy statistics in non-debug builds. 144#ifndef NDEBUG 145#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 146#else 147#define STATS_LOCK() 148#endif 149 150 void TypeInDexCache() { 151 STATS_LOCK(); 152 types_in_dex_cache_++; 153 } 154 155 void TypeNotInDexCache() { 156 STATS_LOCK(); 157 types_not_in_dex_cache_++; 158 } 159 160 void StringInDexCache() { 161 STATS_LOCK(); 162 strings_in_dex_cache_++; 163 } 164 165 void StringNotInDexCache() { 166 STATS_LOCK(); 167 strings_not_in_dex_cache_++; 168 } 169 170 void TypeDoesntNeedAccessCheck() { 171 STATS_LOCK(); 172 resolved_types_++; 173 } 174 175 void TypeNeedsAccessCheck() { 176 STATS_LOCK(); 177 unresolved_types_++; 178 } 179 180 void ResolvedInstanceField() { 181 STATS_LOCK(); 182 resolved_instance_fields_++; 183 } 184 185 void UnresolvedInstanceField() { 186 STATS_LOCK(); 187 unresolved_instance_fields_++; 188 } 189 190 void ResolvedLocalStaticField() { 191 STATS_LOCK(); 192 resolved_local_static_fields_++; 193 } 194 195 void ResolvedStaticField() { 196 STATS_LOCK(); 197 resolved_static_fields_++; 198 } 199 200 void UnresolvedStaticField() { 201 STATS_LOCK(); 202 unresolved_static_fields_++; 203 } 204 205 // Indicate that type information from the verifier led to devirtualization. 206 void PreciseTypeDevirtualization() { 207 STATS_LOCK(); 208 type_based_devirtualization_++; 209 } 210 211 // Indicate that a method of the given type was resolved at compile time. 212 void ResolvedMethod(InvokeType type) { 213 DCHECK_LE(type, kMaxInvokeType); 214 STATS_LOCK(); 215 resolved_methods_[type]++; 216 } 217 218 // Indicate that a method of the given type was unresolved at compile time as it was in an 219 // unknown dex file. 220 void UnresolvedMethod(InvokeType type) { 221 DCHECK_LE(type, kMaxInvokeType); 222 STATS_LOCK(); 223 unresolved_methods_[type]++; 224 } 225 226 // Indicate that a type of virtual method dispatch has been converted into a direct method 227 // dispatch. 228 void VirtualMadeDirect(InvokeType type) { 229 DCHECK(type == kVirtual || type == kInterface || type == kSuper); 230 STATS_LOCK(); 231 virtual_made_direct_[type]++; 232 } 233 234 // Indicate that a method of the given type was able to call directly into boot. 235 void DirectCallsToBoot(InvokeType type) { 236 DCHECK_LE(type, kMaxInvokeType); 237 STATS_LOCK(); 238 direct_calls_to_boot_[type]++; 239 } 240 241 // Indicate that a method of the given type was able to be resolved directly from boot. 242 void DirectMethodsToBoot(InvokeType type) { 243 DCHECK_LE(type, kMaxInvokeType); 244 STATS_LOCK(); 245 direct_methods_to_boot_[type]++; 246 } 247 248 void ProcessedInvoke(InvokeType type, int flags) { 249 STATS_LOCK(); 250 if (flags == 0) { 251 unresolved_methods_[type]++; 252 } else { 253 DCHECK_NE((flags & kFlagMethodResolved), 0); 254 resolved_methods_[type]++; 255 if ((flags & kFlagVirtualMadeDirect) != 0) { 256 virtual_made_direct_[type]++; 257 if ((flags & kFlagPreciseTypeDevirtualization) != 0) { 258 type_based_devirtualization_++; 259 } 260 } else { 261 DCHECK_EQ((flags & kFlagPreciseTypeDevirtualization), 0); 262 } 263 if ((flags & kFlagDirectCallToBoot) != 0) { 264 direct_calls_to_boot_[type]++; 265 } 266 if ((flags & kFlagDirectMethodToBoot) != 0) { 267 direct_methods_to_boot_[type]++; 268 } 269 } 270 } 271 272 // A check-cast could be eliminated due to verifier type analysis. 273 void SafeCast() { 274 STATS_LOCK(); 275 safe_casts_++; 276 } 277 278 // A check-cast couldn't be eliminated due to verifier type analysis. 279 void NotASafeCast() { 280 STATS_LOCK(); 281 not_safe_casts_++; 282 } 283 284 private: 285 Mutex stats_lock_; 286 287 size_t types_in_dex_cache_; 288 size_t types_not_in_dex_cache_; 289 290 size_t strings_in_dex_cache_; 291 size_t strings_not_in_dex_cache_; 292 293 size_t resolved_types_; 294 size_t unresolved_types_; 295 296 size_t resolved_instance_fields_; 297 size_t unresolved_instance_fields_; 298 299 size_t resolved_local_static_fields_; 300 size_t resolved_static_fields_; 301 size_t unresolved_static_fields_; 302 // Type based devirtualization for invoke interface and virtual. 303 size_t type_based_devirtualization_; 304 305 size_t resolved_methods_[kMaxInvokeType + 1]; 306 size_t unresolved_methods_[kMaxInvokeType + 1]; 307 size_t virtual_made_direct_[kMaxInvokeType + 1]; 308 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 309 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 310 311 size_t safe_casts_; 312 size_t not_safe_casts_; 313 314 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 315}; 316 317 318extern "C" art::CompiledMethod* ArtCompileDEX(art::CompilerDriver& compiler, 319 const art::DexFile::CodeItem* code_item, 320 uint32_t access_flags, 321 art::InvokeType invoke_type, 322 uint16_t class_def_idx, 323 uint32_t method_idx, 324 jobject class_loader, 325 const art::DexFile& dex_file); 326 327CompilerDriver::CompilerDriver(const CompilerOptions* compiler_options, 328 VerificationResults* verification_results, 329 DexFileToMethodInlinerMap* method_inliner_map, 330 Compiler::Kind compiler_kind, 331 InstructionSet instruction_set, 332 InstructionSetFeatures instruction_set_features, 333 bool image, std::set<std::string>* image_classes, 334 std::set<std::string>* compiled_classes, size_t thread_count, 335 bool dump_stats, bool dump_passes, CumulativeLogger* timer, 336 std::string profile_file) 337 : profile_present_(false), compiler_options_(compiler_options), 338 verification_results_(verification_results), 339 method_inliner_map_(method_inliner_map), 340 compiler_(Compiler::Create(this, compiler_kind)), 341 instruction_set_(instruction_set), 342 instruction_set_features_(instruction_set_features), 343 freezing_constructor_lock_("freezing constructor lock"), 344 compiled_classes_lock_("compiled classes lock"), 345 compiled_methods_lock_("compiled method lock"), 346 image_(image), 347 image_classes_(image_classes), 348 classes_to_compile_(compiled_classes), 349 thread_count_(thread_count), 350 start_ns_(0), 351 stats_(new AOTCompilationStats), 352 dump_stats_(dump_stats), 353 dump_passes_(dump_passes), 354 timings_logger_(timer), 355 compiler_library_(nullptr), 356 compiler_context_(nullptr), 357 compiler_enable_auto_elf_loading_(nullptr), 358 compiler_get_method_code_addr_(nullptr), 359 support_boot_image_fixup_(instruction_set != kMips), 360 cfi_info_(nullptr), 361 dedupe_code_("dedupe code"), 362 dedupe_mapping_table_("dedupe mapping table"), 363 dedupe_vmap_table_("dedupe vmap table"), 364 dedupe_gc_map_("dedupe gc map"), 365 dedupe_cfi_info_("dedupe cfi info") { 366 DCHECK(compiler_options_ != nullptr); 367 DCHECK(verification_results_ != nullptr); 368 DCHECK(method_inliner_map_ != nullptr); 369 370 CHECK_PTHREAD_CALL(pthread_key_create, (&tls_key_, nullptr), "compiler tls key"); 371 372 dex_to_dex_compiler_ = reinterpret_cast<DexToDexCompilerFn>(ArtCompileDEX); 373 374 compiler_->Init(); 375 376 CHECK(!Runtime::Current()->IsStarted()); 377 if (image_) { 378 CHECK(image_classes_.get() != nullptr); 379 } else { 380 CHECK(image_classes_.get() == nullptr); 381 } 382 383 // Are we generating CFI information? 384 if (compiler_options->GetGenerateGDBInformation()) { 385 cfi_info_.reset(compiler_->GetCallFrameInformationInitialization(*this)); 386 } 387 388 // Read the profile file if one is provided. 389 if (!profile_file.empty()) { 390 profile_present_ = profile_file_.LoadFile(profile_file); 391 if (profile_present_) { 392 LOG(INFO) << "Using profile data form file " << profile_file; 393 } else { 394 LOG(INFO) << "Failed to load profile file " << profile_file; 395 } 396 } 397} 398 399std::vector<uint8_t>* CompilerDriver::DeduplicateCode(const std::vector<uint8_t>& code) { 400 return dedupe_code_.Add(Thread::Current(), code); 401} 402 403std::vector<uint8_t>* CompilerDriver::DeduplicateMappingTable(const std::vector<uint8_t>& code) { 404 return dedupe_mapping_table_.Add(Thread::Current(), code); 405} 406 407std::vector<uint8_t>* CompilerDriver::DeduplicateVMapTable(const std::vector<uint8_t>& code) { 408 return dedupe_vmap_table_.Add(Thread::Current(), code); 409} 410 411std::vector<uint8_t>* CompilerDriver::DeduplicateGCMap(const std::vector<uint8_t>& code) { 412 return dedupe_gc_map_.Add(Thread::Current(), code); 413} 414 415std::vector<uint8_t>* CompilerDriver::DeduplicateCFIInfo(const std::vector<uint8_t>* cfi_info) { 416 if (cfi_info == nullptr) { 417 return nullptr; 418 } 419 return dedupe_cfi_info_.Add(Thread::Current(), *cfi_info); 420} 421 422CompilerDriver::~CompilerDriver() { 423 Thread* self = Thread::Current(); 424 { 425 MutexLock mu(self, compiled_classes_lock_); 426 STLDeleteValues(&compiled_classes_); 427 STLDeleteValues(&compiled_methods_); 428 STLDeleteElements(&code_to_patch_); 429 STLDeleteElements(&methods_to_patch_); 430 STLDeleteElements(&classes_to_patch_); 431 STLDeleteElements(&strings_to_patch_); 432 } 433 CHECK_PTHREAD_CALL(pthread_key_delete, (tls_key_), "delete tls key"); 434 compiler_->UnInit(); 435} 436 437CompilerTls* CompilerDriver::GetTls() { 438 // Lazily create thread-local storage 439 CompilerTls* res = static_cast<CompilerTls*>(pthread_getspecific(tls_key_)); 440 if (res == nullptr) { 441 res = new CompilerTls(); 442 CHECK_PTHREAD_CALL(pthread_setspecific, (tls_key_, res), "compiler tls"); 443 } 444 return res; 445} 446 447#define CREATE_TRAMPOLINE(type, abi, offset) \ 448 if (Is64BitInstructionSet(instruction_set_)) { \ 449 return CreateTrampoline64(instruction_set_, abi, \ 450 type ## _ENTRYPOINT_OFFSET(8, offset)); \ 451 } else { \ 452 return CreateTrampoline32(instruction_set_, abi, \ 453 type ## _ENTRYPOINT_OFFSET(4, offset)); \ 454 } 455 456const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToInterpreterBridge() const { 457 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToInterpreterBridge) 458} 459 460const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToCompiledCodeBridge() const { 461 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToCompiledCodeBridge) 462} 463 464const std::vector<uint8_t>* CompilerDriver::CreateJniDlsymLookup() const { 465 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 466} 467 468const std::vector<uint8_t>* CompilerDriver::CreatePortableImtConflictTrampoline() const { 469 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableImtConflictTrampoline) 470} 471 472const std::vector<uint8_t>* CompilerDriver::CreatePortableResolutionTrampoline() const { 473 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableResolutionTrampoline) 474} 475 476const std::vector<uint8_t>* CompilerDriver::CreatePortableToInterpreterBridge() const { 477 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableToInterpreterBridge) 478} 479 480const std::vector<uint8_t>* CompilerDriver::CreateQuickGenericJniTrampoline() const { 481 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 482} 483 484const std::vector<uint8_t>* CompilerDriver::CreateQuickImtConflictTrampoline() const { 485 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 486} 487 488const std::vector<uint8_t>* CompilerDriver::CreateQuickResolutionTrampoline() const { 489 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 490} 491 492const std::vector<uint8_t>* CompilerDriver::CreateQuickToInterpreterBridge() const { 493 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 494} 495#undef CREATE_TRAMPOLINE 496 497void CompilerDriver::CompileAll(jobject class_loader, 498 const std::vector<const DexFile*>& dex_files, 499 TimingLogger* timings) { 500 DCHECK(!Runtime::Current()->IsStarted()); 501 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", thread_count_ - 1)); 502 PreCompile(class_loader, dex_files, thread_pool.get(), timings); 503 Compile(class_loader, dex_files, thread_pool.get(), timings); 504 if (dump_stats_) { 505 stats_->Dump(); 506 } 507} 508 509static DexToDexCompilationLevel GetDexToDexCompilationlevel( 510 Thread* self, Handle<mirror::ClassLoader> class_loader, const DexFile& dex_file, 511 const DexFile::ClassDef& class_def) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 512 const char* descriptor = dex_file.GetClassDescriptor(class_def); 513 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 514 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 515 if (klass == nullptr) { 516 CHECK(self->IsExceptionPending()); 517 self->ClearException(); 518 return kDontDexToDexCompile; 519 } 520 // DexToDex at the kOptimize level may introduce quickened opcodes, which replace symbolic 521 // references with actual offsets. We cannot re-verify such instructions. 522 // 523 // We store the verification information in the class status in the oat file, which the linker 524 // can validate (checksums) and use to skip load-time verification. It is thus safe to 525 // optimize when a class has been fully verified before. 526 if (klass->IsVerified()) { 527 // Class is verified so we can enable DEX-to-DEX compilation for performance. 528 return kOptimize; 529 } else if (klass->IsCompileTimeVerified()) { 530 // Class verification has soft-failed. Anyway, ensure at least correctness. 531 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 532 return kRequired; 533 } else { 534 // Class verification has failed: do not run DEX-to-DEX compilation. 535 return kDontDexToDexCompile; 536 } 537} 538 539void CompilerDriver::CompileOne(mirror::ArtMethod* method, TimingLogger* timings) { 540 DCHECK(!Runtime::Current()->IsStarted()); 541 Thread* self = Thread::Current(); 542 jobject jclass_loader; 543 const DexFile* dex_file; 544 uint16_t class_def_idx; 545 uint32_t method_idx = method->GetDexMethodIndex(); 546 uint32_t access_flags = method->GetAccessFlags(); 547 InvokeType invoke_type = method->GetInvokeType(); 548 { 549 ScopedObjectAccessUnchecked soa(self); 550 ScopedLocalRef<jobject> 551 local_class_loader(soa.Env(), 552 soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 553 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 554 // Find the dex_file 555 dex_file = method->GetDexFile(); 556 class_def_idx = method->GetClassDefIndex(); 557 } 558 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 559 self->TransitionFromRunnableToSuspended(kNative); 560 561 std::vector<const DexFile*> dex_files; 562 dex_files.push_back(dex_file); 563 564 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", 0U)); 565 PreCompile(jclass_loader, dex_files, thread_pool.get(), timings); 566 567 // Can we run DEX-to-DEX compiler on this class ? 568 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 569 { 570 ScopedObjectAccess soa(Thread::Current()); 571 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_idx); 572 StackHandleScope<1> hs(soa.Self()); 573 Handle<mirror::ClassLoader> class_loader( 574 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 575 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(self, class_loader, *dex_file, 576 class_def); 577 } 578 CompileMethod(code_item, access_flags, invoke_type, class_def_idx, method_idx, jclass_loader, 579 *dex_file, dex_to_dex_compilation_level, true); 580 581 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 582 583 self->TransitionFromSuspendedToRunnable(); 584} 585 586void CompilerDriver::Resolve(jobject class_loader, const std::vector<const DexFile*>& dex_files, 587 ThreadPool* thread_pool, TimingLogger* timings) { 588 for (size_t i = 0; i != dex_files.size(); ++i) { 589 const DexFile* dex_file = dex_files[i]; 590 CHECK(dex_file != nullptr); 591 ResolveDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 592 } 593} 594 595void CompilerDriver::PreCompile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 596 ThreadPool* thread_pool, TimingLogger* timings) { 597 LoadImageClasses(timings); 598 599 Resolve(class_loader, dex_files, thread_pool, timings); 600 601 if (!compiler_options_->IsVerificationEnabled()) { 602 LOG(INFO) << "Verify none mode specified, skipping verification."; 603 SetVerified(class_loader, dex_files, thread_pool, timings); 604 return; 605 } 606 607 Verify(class_loader, dex_files, thread_pool, timings); 608 609 InitializeClasses(class_loader, dex_files, thread_pool, timings); 610 611 UpdateImageClasses(timings); 612} 613 614bool CompilerDriver::IsImageClass(const char* descriptor) const { 615 if (!IsImage()) { 616 return true; 617 } else { 618 return image_classes_->find(descriptor) != image_classes_->end(); 619 } 620} 621 622bool CompilerDriver::IsClassToCompile(const char* descriptor) const { 623 if (!IsImage()) { 624 return true; 625 } else { 626 if (classes_to_compile_ == nullptr) { 627 return true; 628 } 629 return classes_to_compile_->find(descriptor) != classes_to_compile_->end(); 630 } 631} 632 633static void ResolveExceptionsForMethod(MethodHelper* mh, 634 std::set<std::pair<uint16_t, const DexFile*>>& exceptions_to_resolve) 635 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 636 const DexFile::CodeItem* code_item = mh->GetMethod()->GetCodeItem(); 637 if (code_item == nullptr) { 638 return; // native or abstract method 639 } 640 if (code_item->tries_size_ == 0) { 641 return; // nothing to process 642 } 643 const byte* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 644 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 645 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 646 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 647 bool has_catch_all = false; 648 if (encoded_catch_handler_size <= 0) { 649 encoded_catch_handler_size = -encoded_catch_handler_size; 650 has_catch_all = true; 651 } 652 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 653 uint16_t encoded_catch_handler_handlers_type_idx = 654 DecodeUnsignedLeb128(&encoded_catch_handler_list); 655 // Add to set of types to resolve if not already in the dex cache resolved types 656 if (!mh->GetMethod()->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 657 exceptions_to_resolve.insert( 658 std::pair<uint16_t, const DexFile*>(encoded_catch_handler_handlers_type_idx, 659 mh->GetMethod()->GetDexFile())); 660 } 661 // ignore address associated with catch handler 662 DecodeUnsignedLeb128(&encoded_catch_handler_list); 663 } 664 if (has_catch_all) { 665 // ignore catch all address 666 DecodeUnsignedLeb128(&encoded_catch_handler_list); 667 } 668 } 669} 670 671static bool ResolveCatchBlockExceptionsClassVisitor(mirror::Class* c, void* arg) 672 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 673 std::set<std::pair<uint16_t, const DexFile*>>* exceptions_to_resolve = 674 reinterpret_cast<std::set<std::pair<uint16_t, const DexFile*>>*>(arg); 675 StackHandleScope<1> hs(Thread::Current()); 676 MethodHelper mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); 677 for (size_t i = 0; i < c->NumVirtualMethods(); ++i) { 678 mh.ChangeMethod(c->GetVirtualMethod(i)); 679 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 680 } 681 for (size_t i = 0; i < c->NumDirectMethods(); ++i) { 682 mh.ChangeMethod(c->GetDirectMethod(i)); 683 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 684 } 685 return true; 686} 687 688static bool RecordImageClassesVisitor(mirror::Class* klass, void* arg) 689 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 690 std::set<std::string>* image_classes = reinterpret_cast<std::set<std::string>*>(arg); 691 std::string temp; 692 image_classes->insert(klass->GetDescriptor(&temp)); 693 return true; 694} 695 696// Make a list of descriptors for classes to include in the image 697void CompilerDriver::LoadImageClasses(TimingLogger* timings) 698 LOCKS_EXCLUDED(Locks::mutator_lock_) { 699 CHECK(timings != nullptr); 700 if (!IsImage()) { 701 return; 702 } 703 704 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 705 // Make a first class to load all classes explicitly listed in the file 706 Thread* self = Thread::Current(); 707 ScopedObjectAccess soa(self); 708 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 709 CHECK(image_classes_.get() != nullptr); 710 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 711 const std::string& descriptor(*it); 712 StackHandleScope<1> hs(self); 713 Handle<mirror::Class> klass( 714 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 715 if (klass.Get() == nullptr) { 716 VLOG(compiler) << "Failed to find class " << descriptor; 717 image_classes_->erase(it++); 718 self->ClearException(); 719 } else { 720 ++it; 721 } 722 } 723 724 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 725 // exceptions are resolved by the verifier when there is a catch block in an interested method. 726 // Do this here so that exception classes appear to have been specified image classes. 727 std::set<std::pair<uint16_t, const DexFile*>> unresolved_exception_types; 728 StackHandleScope<1> hs(self); 729 Handle<mirror::Class> java_lang_Throwable( 730 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 731 do { 732 unresolved_exception_types.clear(); 733 class_linker->VisitClasses(ResolveCatchBlockExceptionsClassVisitor, 734 &unresolved_exception_types); 735 for (const std::pair<uint16_t, const DexFile*>& exception_type : unresolved_exception_types) { 736 uint16_t exception_type_idx = exception_type.first; 737 const DexFile* dex_file = exception_type.second; 738 StackHandleScope<2> hs(self); 739 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(*dex_file))); 740 Handle<mirror::Class> klass(hs.NewHandle( 741 class_linker->ResolveType(*dex_file, exception_type_idx, dex_cache, 742 NullHandle<mirror::ClassLoader>()))); 743 if (klass.Get() == nullptr) { 744 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 745 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 746 LOG(FATAL) << "Failed to resolve class " << descriptor; 747 } 748 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 749 } 750 // Resolving exceptions may load classes that reference more exceptions, iterate until no 751 // more are found 752 } while (!unresolved_exception_types.empty()); 753 754 // We walk the roots looking for classes so that we'll pick up the 755 // above classes plus any classes them depend on such super 756 // classes, interfaces, and the required ClassLinker roots. 757 class_linker->VisitClasses(RecordImageClassesVisitor, image_classes_.get()); 758 759 CHECK_NE(image_classes_->size(), 0U); 760} 761 762static void MaybeAddToImageClasses(Handle<mirror::Class> c, std::set<std::string>* image_classes) 763 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 764 Thread* self = Thread::Current(); 765 StackHandleScope<1> hs(self); 766 // Make a copy of the handle so that we don't clobber it doing Assign. 767 Handle<mirror::Class> klass(hs.NewHandle(c.Get())); 768 std::string temp; 769 while (!klass->IsObjectClass()) { 770 const char* descriptor = klass->GetDescriptor(&temp); 771 std::pair<std::set<std::string>::iterator, bool> result = image_classes->insert(descriptor); 772 if (!result.second) { // Previously inserted. 773 break; 774 } 775 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 776 for (size_t i = 0; i < klass->NumDirectInterfaces(); ++i) { 777 StackHandleScope<1> hs(self); 778 MaybeAddToImageClasses(hs.NewHandle(mirror::Class::GetDirectInterface(self, klass, i)), 779 image_classes); 780 } 781 if (klass->IsArrayClass()) { 782 StackHandleScope<1> hs(self); 783 MaybeAddToImageClasses(hs.NewHandle(klass->GetComponentType()), image_classes); 784 } 785 klass.Assign(klass->GetSuperClass()); 786 } 787} 788 789void CompilerDriver::FindClinitImageClassesCallback(mirror::Object* object, void* arg) { 790 DCHECK(object != nullptr); 791 DCHECK(arg != nullptr); 792 CompilerDriver* compiler_driver = reinterpret_cast<CompilerDriver*>(arg); 793 StackHandleScope<1> hs(Thread::Current()); 794 MaybeAddToImageClasses(hs.NewHandle(object->GetClass()), compiler_driver->image_classes_.get()); 795} 796 797void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 798 if (IsImage()) { 799 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 800 // Update image_classes_ with classes for objects created by <clinit> methods. 801 Thread* self = Thread::Current(); 802 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter"); 803 gc::Heap* heap = Runtime::Current()->GetHeap(); 804 // TODO: Image spaces only? 805 ScopedObjectAccess soa(Thread::Current()); 806 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 807 heap->VisitObjects(FindClinitImageClassesCallback, this); 808 self->EndAssertNoThreadSuspension(old_cause); 809 } 810} 811 812bool CompilerDriver::CanAssumeTypeIsPresentInDexCache(const DexFile& dex_file, uint32_t type_idx) { 813 if (IsImage() && 814 IsImageClass(dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_))) { 815 { 816 ScopedObjectAccess soa(Thread::Current()); 817 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 818 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 819 if (resolved_class == nullptr) { 820 // Erroneous class. 821 stats_->TypeNotInDexCache(); 822 return false; 823 } 824 } 825 stats_->TypeInDexCache(); 826 return true; 827 } else { 828 stats_->TypeNotInDexCache(); 829 return false; 830 } 831} 832 833bool CompilerDriver::CanAssumeStringIsPresentInDexCache(const DexFile& dex_file, 834 uint32_t string_idx) { 835 // See also Compiler::ResolveDexFile 836 837 bool result = false; 838 if (IsImage()) { 839 // We resolve all const-string strings when building for the image. 840 ScopedObjectAccess soa(Thread::Current()); 841 StackHandleScope<1> hs(soa.Self()); 842 Handle<mirror::DexCache> dex_cache( 843 hs.NewHandle(Runtime::Current()->GetClassLinker()->FindDexCache(dex_file))); 844 Runtime::Current()->GetClassLinker()->ResolveString(dex_file, string_idx, dex_cache); 845 result = true; 846 } 847 if (result) { 848 stats_->StringInDexCache(); 849 } else { 850 stats_->StringNotInDexCache(); 851 } 852 return result; 853} 854 855bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, const DexFile& dex_file, 856 uint32_t type_idx, 857 bool* type_known_final, bool* type_known_abstract, 858 bool* equals_referrers_class) { 859 if (type_known_final != nullptr) { 860 *type_known_final = false; 861 } 862 if (type_known_abstract != nullptr) { 863 *type_known_abstract = false; 864 } 865 if (equals_referrers_class != nullptr) { 866 *equals_referrers_class = false; 867 } 868 ScopedObjectAccess soa(Thread::Current()); 869 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 870 // Get type from dex cache assuming it was populated by the verifier 871 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 872 if (resolved_class == nullptr) { 873 stats_->TypeNeedsAccessCheck(); 874 return false; // Unknown class needs access checks. 875 } 876 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 877 if (equals_referrers_class != nullptr) { 878 *equals_referrers_class = (method_id.class_idx_ == type_idx); 879 } 880 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 881 if (referrer_class == nullptr) { 882 stats_->TypeNeedsAccessCheck(); 883 return false; // Incomplete referrer knowledge needs access check. 884 } 885 // Perform access check, will return true if access is ok or false if we're going to have to 886 // check this at runtime (for example for class loaders). 887 bool result = referrer_class->CanAccess(resolved_class); 888 if (result) { 889 stats_->TypeDoesntNeedAccessCheck(); 890 if (type_known_final != nullptr) { 891 *type_known_final = resolved_class->IsFinal() && !resolved_class->IsArrayClass(); 892 } 893 if (type_known_abstract != nullptr) { 894 *type_known_abstract = resolved_class->IsAbstract() && !resolved_class->IsArrayClass(); 895 } 896 } else { 897 stats_->TypeNeedsAccessCheck(); 898 } 899 return result; 900} 901 902bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 903 const DexFile& dex_file, 904 uint32_t type_idx) { 905 ScopedObjectAccess soa(Thread::Current()); 906 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 907 // Get type from dex cache assuming it was populated by the verifier. 908 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 909 if (resolved_class == nullptr) { 910 stats_->TypeNeedsAccessCheck(); 911 return false; // Unknown class needs access checks. 912 } 913 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 914 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 915 if (referrer_class == nullptr) { 916 stats_->TypeNeedsAccessCheck(); 917 return false; // Incomplete referrer knowledge needs access check. 918 } 919 // Perform access and instantiable checks, will return true if access is ok or false if we're 920 // going to have to check this at runtime (for example for class loaders). 921 bool result = referrer_class->CanAccess(resolved_class) && resolved_class->IsInstantiable(); 922 if (result) { 923 stats_->TypeDoesntNeedAccessCheck(); 924 } else { 925 stats_->TypeNeedsAccessCheck(); 926 } 927 return result; 928} 929 930bool CompilerDriver::CanEmbedTypeInCode(const DexFile& dex_file, uint32_t type_idx, 931 bool* is_type_initialized, bool* use_direct_type_ptr, 932 uintptr_t* direct_type_ptr, bool* out_is_finalizable) { 933 if (GetCompilerOptions().GetCompilePic()) { 934 // Do not allow a direct class pointer to be used when compiling for position-independent 935 return false; 936 } 937 ScopedObjectAccess soa(Thread::Current()); 938 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 939 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 940 if (resolved_class == nullptr) { 941 return false; 942 } 943 *out_is_finalizable = resolved_class->IsFinalizable(); 944 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 945 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 946 if (compiling_boot) { 947 // boot -> boot class pointers. 948 // True if the class is in the image at boot compiling time. 949 const bool is_image_class = IsImage() && IsImageClass( 950 dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_)); 951 // True if pc relative load works. 952 if (is_image_class && support_boot_image_fixup) { 953 *is_type_initialized = resolved_class->IsInitialized(); 954 *use_direct_type_ptr = false; 955 *direct_type_ptr = 0; 956 return true; 957 } else { 958 return false; 959 } 960 } else { 961 // True if the class is in the image at app compiling time. 962 const bool class_in_image = 963 Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_class, false)->IsImageSpace(); 964 if (class_in_image && support_boot_image_fixup) { 965 // boot -> app class pointers. 966 *is_type_initialized = resolved_class->IsInitialized(); 967 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 968 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 969 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 970 return true; 971 } else { 972 // app -> app class pointers. 973 // Give up because app does not have an image and class 974 // isn't created at compile time. TODO: implement this 975 // if/when each app gets an image. 976 return false; 977 } 978 } 979} 980 981bool CompilerDriver::CanEmbedStringInCode(const DexFile& dex_file, uint32_t string_idx, 982 bool* use_direct_type_ptr, uintptr_t* direct_type_ptr) { 983 if (GetCompilerOptions().GetCompilePic()) { 984 // Do not allow a direct class pointer to be used when compiling for position-independent 985 return false; 986 } 987 ScopedObjectAccess soa(Thread::Current()); 988 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 989 mirror::String* resolved_string = dex_cache->GetResolvedString(string_idx); 990 if (resolved_string == nullptr) { 991 return false; 992 } 993 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 994 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 995 if (compiling_boot) { 996 // boot -> boot class pointers. 997 // True if the class is in the image at boot compiling time. 998 const bool is_image_string = IsImage(); 999 // True if pc relative load works. 1000 if (is_image_string && support_boot_image_fixup) { 1001 *use_direct_type_ptr = false; 1002 *direct_type_ptr = 0; 1003 return true; 1004 } 1005 return false; 1006 } else { 1007 // True if the class is in the image at app compiling time. 1008 const bool obj_in_image = 1009 false && Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_string, false)->IsImageSpace(); 1010 if (obj_in_image && support_boot_image_fixup) { 1011 // boot -> app class pointers. 1012 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1013 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 1014 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_string); 1015 return true; 1016 } 1017 1018 // app -> app class pointers. 1019 // Give up because app does not have an image and class 1020 // isn't created at compile time. TODO: implement this 1021 // if/when each app gets an image. 1022 return false; 1023 } 1024} 1025 1026void CompilerDriver::ProcessedInstanceField(bool resolved) { 1027 if (!resolved) { 1028 stats_->UnresolvedInstanceField(); 1029 } else { 1030 stats_->ResolvedInstanceField(); 1031 } 1032} 1033 1034void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1035 if (!resolved) { 1036 stats_->UnresolvedStaticField(); 1037 } else if (local) { 1038 stats_->ResolvedLocalStaticField(); 1039 } else { 1040 stats_->ResolvedStaticField(); 1041 } 1042} 1043 1044void CompilerDriver::ProcessedInvoke(InvokeType invoke_type, int flags) { 1045 stats_->ProcessedInvoke(invoke_type, flags); 1046} 1047 1048mirror::ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1049 const DexCompilationUnit* mUnit, 1050 bool is_put, 1051 const ScopedObjectAccess& soa) { 1052 // Try to resolve the field and compiling method's class. 1053 mirror::ArtField* resolved_field; 1054 mirror::Class* referrer_class; 1055 mirror::DexCache* dex_cache; 1056 { 1057 StackHandleScope<3> hs(soa.Self()); 1058 Handle<mirror::DexCache> dex_cache_handle( 1059 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1060 Handle<mirror::ClassLoader> class_loader_handle( 1061 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1062 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1063 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, false))); 1064 referrer_class = (resolved_field_handle.Get() != nullptr) 1065 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1066 resolved_field = resolved_field_handle.Get(); 1067 dex_cache = dex_cache_handle.Get(); 1068 } 1069 bool can_link = false; 1070 if (resolved_field != nullptr && referrer_class != nullptr) { 1071 std::pair<bool, bool> fast_path = IsFastInstanceField( 1072 dex_cache, referrer_class, resolved_field, field_idx); 1073 can_link = is_put ? fast_path.second : fast_path.first; 1074 } 1075 ProcessedInstanceField(can_link); 1076 return can_link ? resolved_field : nullptr; 1077} 1078 1079bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1080 bool is_put, MemberOffset* field_offset, 1081 bool* is_volatile) { 1082 ScopedObjectAccess soa(Thread::Current()); 1083 StackHandleScope<1> hs(soa.Self()); 1084 Handle<mirror::ArtField> resolved_field = 1085 hs.NewHandle(ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa)); 1086 1087 if (resolved_field.Get() == nullptr) { 1088 // Conservative defaults. 1089 *is_volatile = true; 1090 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1091 return false; 1092 } else { 1093 *is_volatile = resolved_field->IsVolatile(); 1094 *field_offset = resolved_field->GetOffset(); 1095 return true; 1096 } 1097} 1098 1099bool CompilerDriver::ComputeStaticFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1100 bool is_put, MemberOffset* field_offset, 1101 uint32_t* storage_index, bool* is_referrers_class, 1102 bool* is_volatile, bool* is_initialized) { 1103 ScopedObjectAccess soa(Thread::Current()); 1104 // Try to resolve the field and compiling method's class. 1105 mirror::ArtField* resolved_field; 1106 mirror::Class* referrer_class; 1107 mirror::DexCache* dex_cache; 1108 { 1109 StackHandleScope<3> hs(soa.Self()); 1110 Handle<mirror::DexCache> dex_cache_handle( 1111 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1112 Handle<mirror::ClassLoader> class_loader_handle( 1113 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1114 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1115 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, true))); 1116 referrer_class = (resolved_field_handle.Get() != nullptr) 1117 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1118 resolved_field = resolved_field_handle.Get(); 1119 dex_cache = dex_cache_handle.Get(); 1120 } 1121 bool result = false; 1122 if (resolved_field != nullptr && referrer_class != nullptr) { 1123 *is_volatile = IsFieldVolatile(resolved_field); 1124 std::pair<bool, bool> fast_path = IsFastStaticField( 1125 dex_cache, referrer_class, resolved_field, field_idx, field_offset, 1126 storage_index, is_referrers_class, is_initialized); 1127 result = is_put ? fast_path.second : fast_path.first; 1128 } 1129 if (!result) { 1130 // Conservative defaults. 1131 *is_volatile = true; 1132 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1133 *storage_index = -1; 1134 *is_referrers_class = false; 1135 *is_initialized = false; 1136 } 1137 ProcessedStaticField(result, *is_referrers_class); 1138 return result; 1139} 1140 1141void CompilerDriver::GetCodeAndMethodForDirectCall(InvokeType* type, InvokeType sharp_type, 1142 bool no_guarantee_of_dex_cache_entry, 1143 const mirror::Class* referrer_class, 1144 mirror::ArtMethod* method, 1145 int* stats_flags, 1146 MethodReference* target_method, 1147 uintptr_t* direct_code, 1148 uintptr_t* direct_method) { 1149 // For direct and static methods compute possible direct_code and direct_method values, ie 1150 // an address for the Method* being invoked and an address of the code for that Method*. 1151 // For interface calls compute a value for direct_method that is the interface method being 1152 // invoked, so this can be passed to the out-of-line runtime support code. 1153 *direct_code = 0; 1154 *direct_method = 0; 1155 bool use_dex_cache = GetCompilerOptions().GetCompilePic(); // Off by default 1156 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 1157 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1158 const bool force_relocations = (compiling_boot || 1159 GetCompilerOptions().GetIncludePatchInformation()); 1160 if (compiler_->IsPortable()) { 1161 if (sharp_type != kStatic && sharp_type != kDirect) { 1162 return; 1163 } 1164 use_dex_cache = true; 1165 } else { 1166 if (sharp_type != kStatic && sharp_type != kDirect) { 1167 return; 1168 } 1169 // TODO: support patching on all architectures. 1170 use_dex_cache = use_dex_cache || (force_relocations && !support_boot_image_fixup_); 1171 } 1172 bool method_code_in_boot = (method->GetDeclaringClass()->GetClassLoader() == nullptr); 1173 if (!use_dex_cache) { 1174 if (!method_code_in_boot) { 1175 use_dex_cache = true; 1176 } else { 1177 bool has_clinit_trampoline = 1178 method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); 1179 if (has_clinit_trampoline && (method->GetDeclaringClass() != referrer_class)) { 1180 // Ensure we run the clinit trampoline unless we are invoking a static method in the same 1181 // class. 1182 use_dex_cache = true; 1183 } 1184 } 1185 } 1186 if (method_code_in_boot) { 1187 *stats_flags |= kFlagDirectCallToBoot | kFlagDirectMethodToBoot; 1188 } 1189 if (!use_dex_cache && force_relocations) { 1190 if (!IsImage() || !IsImageClass(method->GetDeclaringClassDescriptor())) { 1191 // We can only branch directly to Methods that are resolved in the DexCache. 1192 // Otherwise we won't invoke the resolution trampoline. 1193 use_dex_cache = true; 1194 } 1195 } 1196 // The method is defined not within this dex file. We need a dex cache slot within the current 1197 // dex file or direct pointers. 1198 bool must_use_direct_pointers = false; 1199 if (target_method->dex_file == method->GetDeclaringClass()->GetDexCache()->GetDexFile()) { 1200 target_method->dex_method_index = method->GetDexMethodIndex(); 1201 } else { 1202 if (no_guarantee_of_dex_cache_entry) { 1203 StackHandleScope<1> hs(Thread::Current()); 1204 MethodHelper mh(hs.NewHandle(method)); 1205 // See if the method is also declared in this dex cache. 1206 uint32_t dex_method_idx = mh.FindDexMethodIndexInOtherDexFile( 1207 *target_method->dex_file, target_method->dex_method_index); 1208 if (dex_method_idx != DexFile::kDexNoIndex) { 1209 target_method->dex_method_index = dex_method_idx; 1210 } else { 1211 if (force_relocations && !use_dex_cache) { 1212 target_method->dex_method_index = method->GetDexMethodIndex(); 1213 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1214 } 1215 must_use_direct_pointers = true; 1216 } 1217 } 1218 } 1219 if (use_dex_cache) { 1220 if (must_use_direct_pointers) { 1221 // Fail. Test above showed the only safe dispatch was via the dex cache, however, the direct 1222 // pointers are required as the dex cache lacks an appropriate entry. 1223 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1224 } else { 1225 *type = sharp_type; 1226 } 1227 } else { 1228 bool method_in_image = 1229 Runtime::Current()->GetHeap()->FindSpaceFromObject(method, false)->IsImageSpace(); 1230 if (method_in_image || compiling_boot) { 1231 // We know we must be able to get to the method in the image, so use that pointer. 1232 CHECK(!method->IsAbstract()); 1233 *type = sharp_type; 1234 *direct_method = force_relocations ? -1 : reinterpret_cast<uintptr_t>(method); 1235 *direct_code = force_relocations ? -1 : compiler_->GetEntryPointOf(method); 1236 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1237 target_method->dex_method_index = method->GetDexMethodIndex(); 1238 } else if (!must_use_direct_pointers) { 1239 // Set the code and rely on the dex cache for the method. 1240 *type = sharp_type; 1241 if (force_relocations) { 1242 *direct_code = -1; 1243 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1244 target_method->dex_method_index = method->GetDexMethodIndex(); 1245 } else { 1246 *direct_code = compiler_->GetEntryPointOf(method); 1247 } 1248 } else { 1249 // Direct pointers were required but none were available. 1250 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1251 } 1252 } 1253} 1254 1255bool CompilerDriver::ComputeInvokeInfo(const DexCompilationUnit* mUnit, const uint32_t dex_pc, 1256 bool update_stats, bool enable_devirtualization, 1257 InvokeType* invoke_type, MethodReference* target_method, 1258 int* vtable_idx, uintptr_t* direct_code, 1259 uintptr_t* direct_method) { 1260 InvokeType orig_invoke_type = *invoke_type; 1261 int stats_flags = 0; 1262 ScopedObjectAccess soa(Thread::Current()); 1263 // Try to resolve the method and compiling method's class. 1264 mirror::ArtMethod* resolved_method; 1265 mirror::Class* referrer_class; 1266 StackHandleScope<3> hs(soa.Self()); 1267 Handle<mirror::DexCache> dex_cache( 1268 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1269 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 1270 soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1271 { 1272 uint32_t method_idx = target_method->dex_method_index; 1273 Handle<mirror::ArtMethod> resolved_method_handle(hs.NewHandle( 1274 ResolveMethod(soa, dex_cache, class_loader, mUnit, method_idx, orig_invoke_type))); 1275 referrer_class = (resolved_method_handle.Get() != nullptr) 1276 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader, mUnit) : nullptr; 1277 resolved_method = resolved_method_handle.Get(); 1278 } 1279 bool result = false; 1280 if (resolved_method != nullptr) { 1281 *vtable_idx = GetResolvedMethodVTableIndex(resolved_method, orig_invoke_type); 1282 1283 if (enable_devirtualization) { 1284 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1285 const MethodReference* devirt_target = mUnit->GetVerifiedMethod()->GetDevirtTarget(dex_pc); 1286 1287 stats_flags = IsFastInvoke( 1288 soa, dex_cache, class_loader, mUnit, referrer_class, resolved_method, 1289 invoke_type, target_method, devirt_target, direct_code, direct_method); 1290 result = stats_flags != 0; 1291 } else { 1292 // Devirtualization not enabled. Inline IsFastInvoke(), dropping the devirtualization parts. 1293 if (UNLIKELY(referrer_class == nullptr) || 1294 UNLIKELY(!referrer_class->CanAccessResolvedMethod(resolved_method->GetDeclaringClass(), 1295 resolved_method, dex_cache.Get(), 1296 target_method->dex_method_index)) || 1297 *invoke_type == kSuper) { 1298 // Slow path. (Without devirtualization, all super calls go slow path as well.) 1299 } else { 1300 // Sharpening failed so generate a regular resolved method dispatch. 1301 stats_flags = kFlagMethodResolved; 1302 GetCodeAndMethodForDirectCall(invoke_type, *invoke_type, false, referrer_class, resolved_method, 1303 &stats_flags, target_method, direct_code, direct_method); 1304 result = true; 1305 } 1306 } 1307 } 1308 if (!result) { 1309 // Conservative defaults. 1310 *vtable_idx = -1; 1311 *direct_code = 0u; 1312 *direct_method = 0u; 1313 } 1314 if (update_stats) { 1315 ProcessedInvoke(orig_invoke_type, stats_flags); 1316 } 1317 return result; 1318} 1319 1320const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1321 uint32_t method_idx) const { 1322 MethodReference ref(dex_file, method_idx); 1323 return verification_results_->GetVerifiedMethod(ref); 1324} 1325 1326bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1327 if (!compiler_options_->IsVerificationEnabled()) { 1328 // If we didn't verify, every cast has to be treated as non-safe. 1329 return false; 1330 } 1331 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1332 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1333 if (result) { 1334 stats_->SafeCast(); 1335 } else { 1336 stats_->NotASafeCast(); 1337 } 1338 return result; 1339} 1340 1341void CompilerDriver::AddCodePatch(const DexFile* dex_file, 1342 uint16_t referrer_class_def_idx, 1343 uint32_t referrer_method_idx, 1344 InvokeType referrer_invoke_type, 1345 uint32_t target_method_idx, 1346 const DexFile* target_dex_file, 1347 InvokeType target_invoke_type, 1348 size_t literal_offset) { 1349 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1350 code_to_patch_.push_back(new CallPatchInformation(dex_file, 1351 referrer_class_def_idx, 1352 referrer_method_idx, 1353 referrer_invoke_type, 1354 target_method_idx, 1355 target_dex_file, 1356 target_invoke_type, 1357 literal_offset)); 1358} 1359void CompilerDriver::AddRelativeCodePatch(const DexFile* dex_file, 1360 uint16_t referrer_class_def_idx, 1361 uint32_t referrer_method_idx, 1362 InvokeType referrer_invoke_type, 1363 uint32_t target_method_idx, 1364 const DexFile* target_dex_file, 1365 InvokeType target_invoke_type, 1366 size_t literal_offset, 1367 int32_t pc_relative_offset) { 1368 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1369 code_to_patch_.push_back(new RelativeCallPatchInformation(dex_file, 1370 referrer_class_def_idx, 1371 referrer_method_idx, 1372 referrer_invoke_type, 1373 target_method_idx, 1374 target_dex_file, 1375 target_invoke_type, 1376 literal_offset, 1377 pc_relative_offset)); 1378} 1379void CompilerDriver::AddMethodPatch(const DexFile* dex_file, 1380 uint16_t referrer_class_def_idx, 1381 uint32_t referrer_method_idx, 1382 InvokeType referrer_invoke_type, 1383 uint32_t target_method_idx, 1384 const DexFile* target_dex_file, 1385 InvokeType target_invoke_type, 1386 size_t literal_offset) { 1387 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1388 methods_to_patch_.push_back(new CallPatchInformation(dex_file, 1389 referrer_class_def_idx, 1390 referrer_method_idx, 1391 referrer_invoke_type, 1392 target_method_idx, 1393 target_dex_file, 1394 target_invoke_type, 1395 literal_offset)); 1396} 1397void CompilerDriver::AddClassPatch(const DexFile* dex_file, 1398 uint16_t referrer_class_def_idx, 1399 uint32_t referrer_method_idx, 1400 uint32_t target_type_idx, 1401 size_t literal_offset) { 1402 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1403 classes_to_patch_.push_back(new TypePatchInformation(dex_file, 1404 referrer_class_def_idx, 1405 referrer_method_idx, 1406 target_type_idx, 1407 literal_offset)); 1408} 1409void CompilerDriver::AddStringPatch(const DexFile* dex_file, 1410 uint16_t referrer_class_def_idx, 1411 uint32_t referrer_method_idx, 1412 uint32_t string_idx, 1413 size_t literal_offset) { 1414 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1415 strings_to_patch_.push_back(new StringPatchInformation(dex_file, 1416 referrer_class_def_idx, 1417 referrer_method_idx, 1418 string_idx, 1419 literal_offset)); 1420} 1421 1422class ParallelCompilationManager { 1423 public: 1424 typedef void Callback(const ParallelCompilationManager* manager, size_t index); 1425 1426 ParallelCompilationManager(ClassLinker* class_linker, 1427 jobject class_loader, 1428 CompilerDriver* compiler, 1429 const DexFile* dex_file, 1430 const std::vector<const DexFile*>& dex_files, 1431 ThreadPool* thread_pool) 1432 : index_(0), 1433 class_linker_(class_linker), 1434 class_loader_(class_loader), 1435 compiler_(compiler), 1436 dex_file_(dex_file), 1437 dex_files_(dex_files), 1438 thread_pool_(thread_pool) {} 1439 1440 ClassLinker* GetClassLinker() const { 1441 CHECK(class_linker_ != nullptr); 1442 return class_linker_; 1443 } 1444 1445 jobject GetClassLoader() const { 1446 return class_loader_; 1447 } 1448 1449 CompilerDriver* GetCompiler() const { 1450 CHECK(compiler_ != nullptr); 1451 return compiler_; 1452 } 1453 1454 const DexFile* GetDexFile() const { 1455 CHECK(dex_file_ != nullptr); 1456 return dex_file_; 1457 } 1458 1459 const std::vector<const DexFile*>& GetDexFiles() const { 1460 return dex_files_; 1461 } 1462 1463 void ForAll(size_t begin, size_t end, Callback callback, size_t work_units) { 1464 Thread* self = Thread::Current(); 1465 self->AssertNoPendingException(); 1466 CHECK_GT(work_units, 0U); 1467 1468 index_.StoreRelaxed(begin); 1469 for (size_t i = 0; i < work_units; ++i) { 1470 thread_pool_->AddTask(self, new ForAllClosure(this, end, callback)); 1471 } 1472 thread_pool_->StartWorkers(self); 1473 1474 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1475 // thread destructor's called below perform join). 1476 CHECK_NE(self->GetState(), kRunnable); 1477 1478 // Wait for all the worker threads to finish. 1479 thread_pool_->Wait(self, true, false); 1480 } 1481 1482 size_t NextIndex() { 1483 return index_.FetchAndAddSequentiallyConsistent(1); 1484 } 1485 1486 private: 1487 class ForAllClosure : public Task { 1488 public: 1489 ForAllClosure(ParallelCompilationManager* manager, size_t end, Callback* callback) 1490 : manager_(manager), 1491 end_(end), 1492 callback_(callback) {} 1493 1494 virtual void Run(Thread* self) { 1495 while (true) { 1496 const size_t index = manager_->NextIndex(); 1497 if (UNLIKELY(index >= end_)) { 1498 break; 1499 } 1500 callback_(manager_, index); 1501 self->AssertNoPendingException(); 1502 } 1503 } 1504 1505 virtual void Finalize() { 1506 delete this; 1507 } 1508 1509 private: 1510 ParallelCompilationManager* const manager_; 1511 const size_t end_; 1512 Callback* const callback_; 1513 }; 1514 1515 AtomicInteger index_; 1516 ClassLinker* const class_linker_; 1517 const jobject class_loader_; 1518 CompilerDriver* const compiler_; 1519 const DexFile* const dex_file_; 1520 const std::vector<const DexFile*>& dex_files_; 1521 ThreadPool* const thread_pool_; 1522 1523 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1524}; 1525 1526// A fast version of SkipClass above if the class pointer is available 1527// that avoids the expensive FindInClassPath search. 1528static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1529 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1530 DCHECK(klass != nullptr); 1531 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1532 if (&dex_file != &original_dex_file) { 1533 if (class_loader == nullptr) { 1534 LOG(WARNING) << "Skipping class " << PrettyDescriptor(klass) << " from " 1535 << dex_file.GetLocation() << " previously found in " 1536 << original_dex_file.GetLocation(); 1537 } 1538 return true; 1539 } 1540 return false; 1541} 1542 1543static void CheckAndClearResolveException(Thread* self) 1544 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1545 CHECK(self->IsExceptionPending()); 1546 mirror::Throwable* exception = self->GetException(nullptr); 1547 std::string temp; 1548 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1549 const char* expected_exceptions[] = { 1550 "Ljava/lang/IllegalAccessError;", 1551 "Ljava/lang/IncompatibleClassChangeError;", 1552 "Ljava/lang/InstantiationError;", 1553 "Ljava/lang/LinkageError;", 1554 "Ljava/lang/NoClassDefFoundError;", 1555 "Ljava/lang/NoSuchFieldError;", 1556 "Ljava/lang/NoSuchMethodError;" 1557 }; 1558 bool found = false; 1559 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1560 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1561 found = true; 1562 } 1563 } 1564 if (!found) { 1565 LOG(FATAL) << "Unexpected exception " << exception->Dump(); 1566 } 1567 self->ClearException(); 1568} 1569 1570static void ResolveClassFieldsAndMethods(const ParallelCompilationManager* manager, 1571 size_t class_def_index) 1572 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1573 ATRACE_CALL(); 1574 Thread* self = Thread::Current(); 1575 jobject jclass_loader = manager->GetClassLoader(); 1576 const DexFile& dex_file = *manager->GetDexFile(); 1577 ClassLinker* class_linker = manager->GetClassLinker(); 1578 1579 // If an instance field is final then we need to have a barrier on the return, static final 1580 // fields are assigned within the lock held for class initialization. Conservatively assume 1581 // constructor barriers are always required. 1582 bool requires_constructor_barrier = true; 1583 1584 // Method and Field are the worst. We can't resolve without either 1585 // context from the code use (to disambiguate virtual vs direct 1586 // method and instance vs static field) or from class 1587 // definitions. While the compiler will resolve what it can as it 1588 // needs it, here we try to resolve fields and methods used in class 1589 // definitions, since many of them many never be referenced by 1590 // generated code. 1591 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1592 ScopedObjectAccess soa(self); 1593 StackHandleScope<2> hs(soa.Self()); 1594 Handle<mirror::ClassLoader> class_loader( 1595 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1596 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1597 // Resolve the class. 1598 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1599 class_loader); 1600 bool resolve_fields_and_methods; 1601 if (klass == nullptr) { 1602 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1603 // attempt to resolve methods and fields when there is no declaring class. 1604 CheckAndClearResolveException(soa.Self()); 1605 resolve_fields_and_methods = false; 1606 } else { 1607 // We successfully resolved a class, should we skip it? 1608 if (SkipClass(jclass_loader, dex_file, klass)) { 1609 return; 1610 } 1611 // We want to resolve the methods and fields eagerly. 1612 resolve_fields_and_methods = true; 1613 } 1614 // Note the class_data pointer advances through the headers, 1615 // static fields, instance fields, direct methods, and virtual 1616 // methods. 1617 const byte* class_data = dex_file.GetClassData(class_def); 1618 if (class_data == nullptr) { 1619 // Empty class such as a marker interface. 1620 requires_constructor_barrier = false; 1621 } else { 1622 ClassDataItemIterator it(dex_file, class_data); 1623 while (it.HasNextStaticField()) { 1624 if (resolve_fields_and_methods) { 1625 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1626 dex_cache, class_loader, true); 1627 if (field == nullptr) { 1628 CheckAndClearResolveException(soa.Self()); 1629 } 1630 } 1631 it.Next(); 1632 } 1633 // We require a constructor barrier if there are final instance fields. 1634 requires_constructor_barrier = false; 1635 while (it.HasNextInstanceField()) { 1636 if (it.MemberIsFinal()) { 1637 requires_constructor_barrier = true; 1638 } 1639 if (resolve_fields_and_methods) { 1640 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1641 dex_cache, class_loader, false); 1642 if (field == nullptr) { 1643 CheckAndClearResolveException(soa.Self()); 1644 } 1645 } 1646 it.Next(); 1647 } 1648 if (resolve_fields_and_methods) { 1649 while (it.HasNextDirectMethod()) { 1650 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1651 dex_cache, class_loader, 1652 NullHandle<mirror::ArtMethod>(), 1653 it.GetMethodInvokeType(class_def)); 1654 if (method == nullptr) { 1655 CheckAndClearResolveException(soa.Self()); 1656 } 1657 it.Next(); 1658 } 1659 while (it.HasNextVirtualMethod()) { 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 DCHECK(!it.HasNext()); 1670 } 1671 } 1672 if (requires_constructor_barrier) { 1673 manager->GetCompiler()->AddRequiresConstructorBarrier(self, &dex_file, class_def_index); 1674 } 1675} 1676 1677static void ResolveType(const ParallelCompilationManager* manager, size_t type_idx) 1678 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1679 // Class derived values are more complicated, they require the linker and loader. 1680 ScopedObjectAccess soa(Thread::Current()); 1681 ClassLinker* class_linker = manager->GetClassLinker(); 1682 const DexFile& dex_file = *manager->GetDexFile(); 1683 StackHandleScope<2> hs(soa.Self()); 1684 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1685 Handle<mirror::ClassLoader> class_loader( 1686 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(manager->GetClassLoader()))); 1687 mirror::Class* klass = class_linker->ResolveType(dex_file, type_idx, dex_cache, class_loader); 1688 1689 if (klass == nullptr) { 1690 CHECK(soa.Self()->IsExceptionPending()); 1691 mirror::Throwable* exception = soa.Self()->GetException(nullptr); 1692 VLOG(compiler) << "Exception during type resolution: " << exception->Dump(); 1693 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 1694 // There's little point continuing compilation if the heap is exhausted. 1695 LOG(FATAL) << "Out of memory during type resolution for compilation"; 1696 } 1697 soa.Self()->ClearException(); 1698 } 1699} 1700 1701void CompilerDriver::ResolveDexFile(jobject class_loader, const DexFile& dex_file, 1702 const std::vector<const DexFile*>& dex_files, 1703 ThreadPool* thread_pool, TimingLogger* timings) { 1704 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1705 1706 // TODO: we could resolve strings here, although the string table is largely filled with class 1707 // and method names. 1708 1709 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1710 thread_pool); 1711 if (IsImage()) { 1712 // For images we resolve all types, such as array, whereas for applications just those with 1713 // classdefs are resolved by ResolveClassFieldsAndMethods. 1714 TimingLogger::ScopedTiming t("Resolve Types", timings); 1715 context.ForAll(0, dex_file.NumTypeIds(), ResolveType, thread_count_); 1716 } 1717 1718 TimingLogger::ScopedTiming t("Resolve MethodsAndFields", timings); 1719 context.ForAll(0, dex_file.NumClassDefs(), ResolveClassFieldsAndMethods, thread_count_); 1720} 1721 1722void CompilerDriver::SetVerified(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1723 ThreadPool* thread_pool, TimingLogger* timings) { 1724 for (size_t i = 0; i != dex_files.size(); ++i) { 1725 const DexFile* dex_file = dex_files[i]; 1726 CHECK(dex_file != nullptr); 1727 SetVerifiedDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1728 } 1729} 1730 1731void CompilerDriver::Verify(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1732 ThreadPool* thread_pool, TimingLogger* timings) { 1733 for (size_t i = 0; i != dex_files.size(); ++i) { 1734 const DexFile* dex_file = dex_files[i]; 1735 CHECK(dex_file != nullptr); 1736 VerifyDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1737 } 1738} 1739 1740static void VerifyClass(const ParallelCompilationManager* manager, size_t class_def_index) 1741 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1742 ATRACE_CALL(); 1743 ScopedObjectAccess soa(Thread::Current()); 1744 const DexFile& dex_file = *manager->GetDexFile(); 1745 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1746 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1747 ClassLinker* class_linker = manager->GetClassLinker(); 1748 jobject jclass_loader = manager->GetClassLoader(); 1749 StackHandleScope<3> hs(soa.Self()); 1750 Handle<mirror::ClassLoader> class_loader( 1751 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1752 Handle<mirror::Class> klass( 1753 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1754 if (klass.Get() == nullptr) { 1755 CHECK(soa.Self()->IsExceptionPending()); 1756 soa.Self()->ClearException(); 1757 1758 /* 1759 * At compile time, we can still structurally verify the class even if FindClass fails. 1760 * This is to ensure the class is structurally sound for compilation. An unsound class 1761 * will be rejected by the verifier and later skipped during compilation in the compiler. 1762 */ 1763 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1764 std::string error_msg; 1765 if (verifier::MethodVerifier::VerifyClass(&dex_file, dex_cache, class_loader, &class_def, true, 1766 &error_msg) == 1767 verifier::MethodVerifier::kHardFailure) { 1768 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 1769 << " because: " << error_msg; 1770 } 1771 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 1772 CHECK(klass->IsResolved()) << PrettyClass(klass.Get()); 1773 class_linker->VerifyClass(klass); 1774 1775 if (klass->IsErroneous()) { 1776 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 1777 CHECK(soa.Self()->IsExceptionPending()); 1778 soa.Self()->ClearException(); 1779 } 1780 1781 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 1782 << PrettyDescriptor(klass.Get()) << ": state=" << klass->GetStatus(); 1783 } 1784 soa.Self()->AssertNoPendingException(); 1785} 1786 1787void CompilerDriver::VerifyDexFile(jobject class_loader, const DexFile& dex_file, 1788 const std::vector<const DexFile*>& dex_files, 1789 ThreadPool* thread_pool, TimingLogger* timings) { 1790 TimingLogger::ScopedTiming t("Verify Dex File", timings); 1791 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1792 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1793 thread_pool); 1794 context.ForAll(0, dex_file.NumClassDefs(), VerifyClass, thread_count_); 1795} 1796 1797static void SetVerifiedClass(const ParallelCompilationManager* manager, size_t class_def_index) 1798 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1799 ATRACE_CALL(); 1800 ScopedObjectAccess soa(Thread::Current()); 1801 const DexFile& dex_file = *manager->GetDexFile(); 1802 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1803 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1804 ClassLinker* class_linker = manager->GetClassLinker(); 1805 jobject jclass_loader = manager->GetClassLoader(); 1806 StackHandleScope<3> hs(soa.Self()); 1807 Handle<mirror::ClassLoader> class_loader( 1808 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1809 Handle<mirror::Class> klass( 1810 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1811 // Class might have failed resolution. Then don't set it to verified. 1812 if (klass.Get() != nullptr) { 1813 // Only do this if the class is resolved. If even resolution fails, quickening will go very, 1814 // very wrong. 1815 if (klass->IsResolved()) { 1816 if (klass->GetStatus() < mirror::Class::kStatusVerified) { 1817 ObjectLock<mirror::Class> lock(soa.Self(), klass); 1818 klass->SetStatus(mirror::Class::kStatusVerified, soa.Self()); 1819 } 1820 // Record the final class status if necessary. 1821 ClassReference ref(manager->GetDexFile(), class_def_index); 1822 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1823 } 1824 } else { 1825 Thread* self = soa.Self(); 1826 DCHECK(self->IsExceptionPending()); 1827 self->ClearException(); 1828 } 1829} 1830 1831void CompilerDriver::SetVerifiedDexFile(jobject class_loader, const DexFile& dex_file, 1832 const std::vector<const DexFile*>& dex_files, 1833 ThreadPool* thread_pool, TimingLogger* timings) { 1834 TimingLogger::ScopedTiming t("Verify Dex File", timings); 1835 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1836 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1837 thread_pool); 1838 context.ForAll(0, dex_file.NumClassDefs(), SetVerifiedClass, thread_count_); 1839} 1840 1841static void InitializeClass(const ParallelCompilationManager* manager, size_t class_def_index) 1842 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1843 ATRACE_CALL(); 1844 jobject jclass_loader = manager->GetClassLoader(); 1845 const DexFile& dex_file = *manager->GetDexFile(); 1846 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1847 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 1848 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 1849 1850 ScopedObjectAccess soa(Thread::Current()); 1851 StackHandleScope<3> hs(soa.Self()); 1852 Handle<mirror::ClassLoader> class_loader( 1853 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1854 Handle<mirror::Class> klass( 1855 hs.NewHandle(manager->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 1856 1857 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 1858 // Only try to initialize classes that were successfully verified. 1859 if (klass->IsVerified()) { 1860 // Attempt to initialize the class but bail if we either need to initialize the super-class 1861 // or static fields. 1862 manager->GetClassLinker()->EnsureInitialized(klass, false, false); 1863 if (!klass->IsInitialized()) { 1864 // We don't want non-trivial class initialization occurring on multiple threads due to 1865 // deadlock problems. For example, a parent class is initialized (holding its lock) that 1866 // refers to a sub-class in its static/class initializer causing it to try to acquire the 1867 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 1868 // after first initializing its parents, whose locks are acquired. This leads to a 1869 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 1870 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 1871 // than use a special Object for the purpose we use the Class of java.lang.Class. 1872 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 1873 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 1874 // Attempt to initialize allowing initialization of parent classes but still not static 1875 // fields. 1876 manager->GetClassLinker()->EnsureInitialized(klass, false, true); 1877 if (!klass->IsInitialized()) { 1878 // We need to initialize static fields, we only do this for image classes that aren't 1879 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 1880 bool can_init_static_fields = manager->GetCompiler()->IsImage() && 1881 manager->GetCompiler()->IsImageClass(descriptor) && 1882 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 1883 if (can_init_static_fields) { 1884 VLOG(compiler) << "Initializing: " << descriptor; 1885 // TODO multithreading support. We should ensure the current compilation thread has 1886 // exclusive access to the runtime and the transaction. To achieve this, we could use 1887 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 1888 // checks in Thread::AssertThreadSuspensionIsAllowable. 1889 Runtime* const runtime = Runtime::Current(); 1890 Transaction transaction; 1891 1892 // Run the class initializer in transaction mode. 1893 runtime->EnterTransactionMode(&transaction); 1894 const mirror::Class::Status old_status = klass->GetStatus(); 1895 bool success = manager->GetClassLinker()->EnsureInitialized(klass, true, true); 1896 // TODO we detach transaction from runtime to indicate we quit the transactional 1897 // mode which prevents the GC from visiting objects modified during the transaction. 1898 // Ensure GC is not run so don't access freed objects when aborting transaction. 1899 const char* old_casue = soa.Self()->StartAssertNoThreadSuspension("Transaction end"); 1900 runtime->ExitTransactionMode(); 1901 1902 if (!success) { 1903 CHECK(soa.Self()->IsExceptionPending()); 1904 ThrowLocation throw_location; 1905 mirror::Throwable* exception = soa.Self()->GetException(&throw_location); 1906 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 1907 << exception->Dump(); 1908 soa.Self()->ClearException(); 1909 transaction.Abort(); 1910 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 1911 } 1912 soa.Self()->EndAssertNoThreadSuspension(old_casue); 1913 } 1914 } 1915 soa.Self()->AssertNoPendingException(); 1916 } 1917 } 1918 // Record the final class status if necessary. 1919 ClassReference ref(manager->GetDexFile(), class_def_index); 1920 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1921 } 1922 // Clear any class not found or verification exceptions. 1923 soa.Self()->ClearException(); 1924} 1925 1926void CompilerDriver::InitializeClasses(jobject jni_class_loader, const DexFile& dex_file, 1927 const std::vector<const DexFile*>& dex_files, 1928 ThreadPool* thread_pool, TimingLogger* timings) { 1929 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 1930 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1931 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 1932 thread_pool); 1933 size_t thread_count; 1934 if (IsImage()) { 1935 // TODO: remove this when transactional mode supports multithreading. 1936 thread_count = 1U; 1937 } else { 1938 thread_count = thread_count_; 1939 } 1940 context.ForAll(0, dex_file.NumClassDefs(), InitializeClass, thread_count); 1941} 1942 1943void CompilerDriver::InitializeClasses(jobject class_loader, 1944 const std::vector<const DexFile*>& dex_files, 1945 ThreadPool* thread_pool, TimingLogger* timings) { 1946 for (size_t i = 0; i != dex_files.size(); ++i) { 1947 const DexFile* dex_file = dex_files[i]; 1948 CHECK(dex_file != nullptr); 1949 InitializeClasses(class_loader, *dex_file, dex_files, thread_pool, timings); 1950 } 1951 if (IsImage()) { 1952 // Prune garbage objects created during aborted transactions. 1953 Runtime::Current()->GetHeap()->CollectGarbage(true); 1954 } 1955} 1956 1957void CompilerDriver::Compile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1958 ThreadPool* thread_pool, TimingLogger* timings) { 1959 for (size_t i = 0; i != dex_files.size(); ++i) { 1960 const DexFile* dex_file = dex_files[i]; 1961 CHECK(dex_file != nullptr); 1962 CompileDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1963 } 1964} 1965 1966void CompilerDriver::CompileClass(const ParallelCompilationManager* manager, size_t class_def_index) { 1967 ATRACE_CALL(); 1968 const DexFile& dex_file = *manager->GetDexFile(); 1969 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1970 ClassLinker* class_linker = manager->GetClassLinker(); 1971 jobject jclass_loader = manager->GetClassLoader(); 1972 { 1973 // Use a scoped object access to perform to the quick SkipClass check. 1974 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1975 ScopedObjectAccess soa(Thread::Current()); 1976 StackHandleScope<3> hs(soa.Self()); 1977 Handle<mirror::ClassLoader> class_loader( 1978 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1979 Handle<mirror::Class> klass( 1980 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1981 if (klass.Get() == nullptr) { 1982 CHECK(soa.Self()->IsExceptionPending()); 1983 soa.Self()->ClearException(); 1984 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 1985 return; 1986 } 1987 } 1988 ClassReference ref(&dex_file, class_def_index); 1989 // Skip compiling classes with generic verifier failures since they will still fail at runtime 1990 if (manager->GetCompiler()->verification_results_->IsClassRejected(ref)) { 1991 return; 1992 } 1993 const byte* class_data = dex_file.GetClassData(class_def); 1994 if (class_data == nullptr) { 1995 // empty class, probably a marker interface 1996 return; 1997 } 1998 1999 // Can we run DEX-to-DEX compiler on this class ? 2000 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 2001 { 2002 ScopedObjectAccess soa(Thread::Current()); 2003 StackHandleScope<1> hs(soa.Self()); 2004 Handle<mirror::ClassLoader> class_loader( 2005 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 2006 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(soa.Self(), class_loader, dex_file, 2007 class_def); 2008 } 2009 ClassDataItemIterator it(dex_file, class_data); 2010 // Skip fields 2011 while (it.HasNextStaticField()) { 2012 it.Next(); 2013 } 2014 while (it.HasNextInstanceField()) { 2015 it.Next(); 2016 } 2017 CompilerDriver* driver = manager->GetCompiler(); 2018 2019 bool compilation_enabled = driver->IsClassToCompile( 2020 dex_file.StringByTypeIdx(class_def.class_idx_)); 2021 2022 // Compile direct methods 2023 int64_t previous_direct_method_idx = -1; 2024 while (it.HasNextDirectMethod()) { 2025 uint32_t method_idx = it.GetMemberIndex(); 2026 if (method_idx == previous_direct_method_idx) { 2027 // smali can create dex files with two encoded_methods sharing the same method_idx 2028 // http://code.google.com/p/smali/issues/detail?id=119 2029 it.Next(); 2030 continue; 2031 } 2032 previous_direct_method_idx = method_idx; 2033 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2034 it.GetMethodInvokeType(class_def), class_def_index, 2035 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2036 compilation_enabled); 2037 it.Next(); 2038 } 2039 // Compile virtual methods 2040 int64_t previous_virtual_method_idx = -1; 2041 while (it.HasNextVirtualMethod()) { 2042 uint32_t method_idx = it.GetMemberIndex(); 2043 if (method_idx == previous_virtual_method_idx) { 2044 // smali can create dex files with two encoded_methods sharing the same method_idx 2045 // http://code.google.com/p/smali/issues/detail?id=119 2046 it.Next(); 2047 continue; 2048 } 2049 previous_virtual_method_idx = method_idx; 2050 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMethodAccessFlags(), 2051 it.GetMethodInvokeType(class_def), class_def_index, 2052 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level, 2053 compilation_enabled); 2054 it.Next(); 2055 } 2056 DCHECK(!it.HasNext()); 2057} 2058 2059void CompilerDriver::CompileDexFile(jobject class_loader, const DexFile& dex_file, 2060 const std::vector<const DexFile*>& dex_files, 2061 ThreadPool* thread_pool, TimingLogger* timings) { 2062 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2063 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2064 &dex_file, dex_files, thread_pool); 2065 context.ForAll(0, dex_file.NumClassDefs(), CompilerDriver::CompileClass, thread_count_); 2066} 2067 2068void CompilerDriver::CompileMethod(const DexFile::CodeItem* code_item, uint32_t access_flags, 2069 InvokeType invoke_type, uint16_t class_def_idx, 2070 uint32_t method_idx, jobject class_loader, 2071 const DexFile& dex_file, 2072 DexToDexCompilationLevel dex_to_dex_compilation_level, 2073 bool compilation_enabled) { 2074 CompiledMethod* compiled_method = nullptr; 2075 uint64_t start_ns = kTimeCompileMethod ? NanoTime() : 0; 2076 2077 if ((access_flags & kAccNative) != 0) { 2078 // Are we interpreting only and have support for generic JNI down calls? 2079 if (!compiler_options_->IsCompilationEnabled() && 2080 (instruction_set_ == kX86_64 || instruction_set_ == kArm64)) { 2081 // Leaving this empty will trigger the generic JNI version 2082 } else { 2083 compiled_method = compiler_->JniCompile(access_flags, method_idx, dex_file); 2084 CHECK(compiled_method != nullptr); 2085 } 2086 } else if ((access_flags & kAccAbstract) != 0) { 2087 } else { 2088 MethodReference method_ref(&dex_file, method_idx); 2089 bool compile = compilation_enabled && 2090 verification_results_->IsCandidateForCompilation(method_ref, access_flags); 2091 if (compile) { 2092 // NOTE: if compiler declines to compile this method, it will return nullptr. 2093 compiled_method = compiler_->Compile(code_item, access_flags, invoke_type, class_def_idx, 2094 method_idx, class_loader, dex_file); 2095 } 2096 if (compiled_method == nullptr && dex_to_dex_compilation_level != kDontDexToDexCompile) { 2097 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 2098 (*dex_to_dex_compiler_)(*this, code_item, access_flags, 2099 invoke_type, class_def_idx, 2100 method_idx, class_loader, dex_file, 2101 dex_to_dex_compilation_level); 2102 } 2103 } 2104 if (kTimeCompileMethod) { 2105 uint64_t duration_ns = NanoTime() - start_ns; 2106 if (duration_ns > MsToNs(compiler_->GetMaximumCompilationTimeBeforeWarning())) { 2107 LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) 2108 << " took " << PrettyDuration(duration_ns); 2109 } 2110 } 2111 2112 Thread* self = Thread::Current(); 2113 if (compiled_method != nullptr) { 2114 MethodReference ref(&dex_file, method_idx); 2115 DCHECK(GetCompiledMethod(ref) == nullptr) << PrettyMethod(method_idx, dex_file); 2116 { 2117 MutexLock mu(self, compiled_methods_lock_); 2118 compiled_methods_.Put(ref, compiled_method); 2119 } 2120 DCHECK(GetCompiledMethod(ref) != nullptr) << PrettyMethod(method_idx, dex_file); 2121 } 2122 2123 if (self->IsExceptionPending()) { 2124 ScopedObjectAccess soa(self); 2125 LOG(FATAL) << "Unexpected exception compiling: " << PrettyMethod(method_idx, dex_file) << "\n" 2126 << self->GetException(nullptr)->Dump(); 2127 } 2128} 2129 2130CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2131 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2132 ClassTable::const_iterator it = compiled_classes_.find(ref); 2133 if (it == compiled_classes_.end()) { 2134 return nullptr; 2135 } 2136 CHECK(it->second != nullptr); 2137 return it->second; 2138} 2139 2140void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2141 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2142 auto it = compiled_classes_.find(ref); 2143 if (it == compiled_classes_.end() || it->second->GetStatus() != status) { 2144 // An entry doesn't exist or the status is lower than the new status. 2145 if (it != compiled_classes_.end()) { 2146 CHECK_GT(status, it->second->GetStatus()); 2147 delete it->second; 2148 } 2149 switch (status) { 2150 case mirror::Class::kStatusNotReady: 2151 case mirror::Class::kStatusError: 2152 case mirror::Class::kStatusRetryVerificationAtRuntime: 2153 case mirror::Class::kStatusVerified: 2154 case mirror::Class::kStatusInitialized: 2155 break; // Expected states. 2156 default: 2157 LOG(FATAL) << "Unexpected class status for class " 2158 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2159 << " of " << status; 2160 } 2161 CompiledClass* compiled_class = new CompiledClass(status); 2162 compiled_classes_.Overwrite(ref, compiled_class); 2163 } 2164} 2165 2166CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2167 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2168 MethodTable::const_iterator it = compiled_methods_.find(ref); 2169 if (it == compiled_methods_.end()) { 2170 return nullptr; 2171 } 2172 CHECK(it->second != nullptr); 2173 return it->second; 2174} 2175 2176void CompilerDriver::AddRequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2177 uint16_t class_def_index) { 2178 WriterMutexLock mu(self, freezing_constructor_lock_); 2179 freezing_constructor_classes_.insert(ClassReference(dex_file, class_def_index)); 2180} 2181 2182bool CompilerDriver::RequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2183 uint16_t class_def_index) { 2184 ReaderMutexLock mu(self, freezing_constructor_lock_); 2185 return freezing_constructor_classes_.count(ClassReference(dex_file, class_def_index)) != 0; 2186} 2187 2188bool CompilerDriver::WriteElf(const std::string& android_root, 2189 bool is_host, 2190 const std::vector<const art::DexFile*>& dex_files, 2191 OatWriter* oat_writer, 2192 art::File* file) 2193 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 2194 return compiler_->WriteElf(file, oat_writer, dex_files, android_root, is_host); 2195} 2196void CompilerDriver::InstructionSetToLLVMTarget(InstructionSet instruction_set, 2197 std::string* target_triple, 2198 std::string* target_cpu, 2199 std::string* target_attr) { 2200 switch (instruction_set) { 2201 case kThumb2: 2202 *target_triple = "thumb-none-linux-gnueabi"; 2203 *target_cpu = "cortex-a9"; 2204 *target_attr = "+thumb2,+neon,+neonfp,+vfp3,+db"; 2205 break; 2206 2207 case kArm: 2208 *target_triple = "armv7-none-linux-gnueabi"; 2209 // TODO: Fix for Nexus S. 2210 *target_cpu = "cortex-a9"; 2211 // TODO: Fix for Xoom. 2212 *target_attr = "+v7,+neon,+neonfp,+vfp3,+db"; 2213 break; 2214 2215 case kX86: 2216 *target_triple = "i386-pc-linux-gnu"; 2217 *target_attr = ""; 2218 break; 2219 2220 case kX86_64: 2221 *target_triple = "x86_64-pc-linux-gnu"; 2222 *target_attr = ""; 2223 break; 2224 2225 case kMips: 2226 *target_triple = "mipsel-unknown-linux"; 2227 *target_attr = "mips32r2"; 2228 break; 2229 2230 default: 2231 LOG(FATAL) << "Unknown instruction set: " << instruction_set; 2232 } 2233 } 2234 2235bool CompilerDriver::SkipCompilation(const std::string& method_name) { 2236 if (!profile_present_) { 2237 return false; 2238 } 2239 // First find the method in the profile file. 2240 ProfileFile::ProfileData data; 2241 if (!profile_file_.GetProfileData(&data, method_name)) { 2242 // Not in profile, no information can be determined. 2243 if (kIsDebugBuild) { 2244 VLOG(compiler) << "not compiling " << method_name << " because it's not in the profile"; 2245 } 2246 return true; 2247 } 2248 2249 // Methods that comprise top_k_threshold % of the total samples will be compiled. 2250 // Compare against the start of the topK percentage bucket just in case the threshold 2251 // falls inside a bucket. 2252 bool compile = data.GetTopKUsedPercentage() - data.GetUsedPercent() 2253 <= compiler_options_->GetTopKProfileThreshold(); 2254 if (kIsDebugBuild) { 2255 if (compile) { 2256 LOG(INFO) << "compiling method " << method_name << " because its usage is part of top " 2257 << data.GetTopKUsedPercentage() << "% with a percent of " << data.GetUsedPercent() << "%" 2258 << " (topKThreshold=" << compiler_options_->GetTopKProfileThreshold() << ")"; 2259 } else { 2260 VLOG(compiler) << "not compiling method " << method_name 2261 << " because it's not part of leading " << compiler_options_->GetTopKProfileThreshold() 2262 << "% samples)"; 2263 } 2264 } 2265 return !compile; 2266} 2267} // namespace art 2268