compiler_driver.cc revision 1ff3c98775a4577cf053dba9a0c2d5c21c07b298
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 double Percentage(size_t x, size_t y) { 65 return 100.0 * (static_cast<double>(x)) / (static_cast<double>(x + y)); 66} 67 68static void DumpStat(size_t x, size_t y, const char* str) { 69 if (x == 0 && y == 0) { 70 return; 71 } 72 LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases"; 73} 74 75class CompilerDriver::AOTCompilationStats { 76 public: 77 AOTCompilationStats() 78 : stats_lock_("AOT compilation statistics lock"), 79 types_in_dex_cache_(0), types_not_in_dex_cache_(0), 80 strings_in_dex_cache_(0), strings_not_in_dex_cache_(0), 81 resolved_types_(0), unresolved_types_(0), 82 resolved_instance_fields_(0), unresolved_instance_fields_(0), 83 resolved_local_static_fields_(0), resolved_static_fields_(0), unresolved_static_fields_(0), 84 type_based_devirtualization_(0), 85 safe_casts_(0), not_safe_casts_(0) { 86 for (size_t i = 0; i <= kMaxInvokeType; i++) { 87 resolved_methods_[i] = 0; 88 unresolved_methods_[i] = 0; 89 virtual_made_direct_[i] = 0; 90 direct_calls_to_boot_[i] = 0; 91 direct_methods_to_boot_[i] = 0; 92 } 93 } 94 95 void Dump() { 96 DumpStat(types_in_dex_cache_, types_not_in_dex_cache_, "types known to be in dex cache"); 97 DumpStat(strings_in_dex_cache_, strings_not_in_dex_cache_, "strings known to be in dex cache"); 98 DumpStat(resolved_types_, unresolved_types_, "types resolved"); 99 DumpStat(resolved_instance_fields_, unresolved_instance_fields_, "instance fields resolved"); 100 DumpStat(resolved_local_static_fields_ + resolved_static_fields_, unresolved_static_fields_, 101 "static fields resolved"); 102 DumpStat(resolved_local_static_fields_, resolved_static_fields_ + unresolved_static_fields_, 103 "static fields local to a class"); 104 DumpStat(safe_casts_, not_safe_casts_, "check-casts removed based on type information"); 105 // Note, the code below subtracts the stat value so that when added to the stat value we have 106 // 100% of samples. TODO: clean this up. 107 DumpStat(type_based_devirtualization_, 108 resolved_methods_[kVirtual] + unresolved_methods_[kVirtual] + 109 resolved_methods_[kInterface] + unresolved_methods_[kInterface] - 110 type_based_devirtualization_, 111 "virtual/interface calls made direct based on type information"); 112 113 for (size_t i = 0; i <= kMaxInvokeType; i++) { 114 std::ostringstream oss; 115 oss << static_cast<InvokeType>(i) << " methods were AOT resolved"; 116 DumpStat(resolved_methods_[i], unresolved_methods_[i], oss.str().c_str()); 117 if (virtual_made_direct_[i] > 0) { 118 std::ostringstream oss2; 119 oss2 << static_cast<InvokeType>(i) << " methods made direct"; 120 DumpStat(virtual_made_direct_[i], 121 resolved_methods_[i] + unresolved_methods_[i] - virtual_made_direct_[i], 122 oss2.str().c_str()); 123 } 124 if (direct_calls_to_boot_[i] > 0) { 125 std::ostringstream oss2; 126 oss2 << static_cast<InvokeType>(i) << " method calls are direct into boot"; 127 DumpStat(direct_calls_to_boot_[i], 128 resolved_methods_[i] + unresolved_methods_[i] - direct_calls_to_boot_[i], 129 oss2.str().c_str()); 130 } 131 if (direct_methods_to_boot_[i] > 0) { 132 std::ostringstream oss2; 133 oss2 << static_cast<InvokeType>(i) << " method calls have methods in boot"; 134 DumpStat(direct_methods_to_boot_[i], 135 resolved_methods_[i] + unresolved_methods_[i] - direct_methods_to_boot_[i], 136 oss2.str().c_str()); 137 } 138 } 139 } 140 141// Allow lossy statistics in non-debug builds. 142#ifndef NDEBUG 143#define STATS_LOCK() MutexLock mu(Thread::Current(), stats_lock_) 144#else 145#define STATS_LOCK() 146#endif 147 148 void TypeInDexCache() { 149 STATS_LOCK(); 150 types_in_dex_cache_++; 151 } 152 153 void TypeNotInDexCache() { 154 STATS_LOCK(); 155 types_not_in_dex_cache_++; 156 } 157 158 void StringInDexCache() { 159 STATS_LOCK(); 160 strings_in_dex_cache_++; 161 } 162 163 void StringNotInDexCache() { 164 STATS_LOCK(); 165 strings_not_in_dex_cache_++; 166 } 167 168 void TypeDoesntNeedAccessCheck() { 169 STATS_LOCK(); 170 resolved_types_++; 171 } 172 173 void TypeNeedsAccessCheck() { 174 STATS_LOCK(); 175 unresolved_types_++; 176 } 177 178 void ResolvedInstanceField() { 179 STATS_LOCK(); 180 resolved_instance_fields_++; 181 } 182 183 void UnresolvedInstanceField() { 184 STATS_LOCK(); 185 unresolved_instance_fields_++; 186 } 187 188 void ResolvedLocalStaticField() { 189 STATS_LOCK(); 190 resolved_local_static_fields_++; 191 } 192 193 void ResolvedStaticField() { 194 STATS_LOCK(); 195 resolved_static_fields_++; 196 } 197 198 void UnresolvedStaticField() { 199 STATS_LOCK(); 200 unresolved_static_fields_++; 201 } 202 203 // Indicate that type information from the verifier led to devirtualization. 204 void PreciseTypeDevirtualization() { 205 STATS_LOCK(); 206 type_based_devirtualization_++; 207 } 208 209 // Indicate that a method of the given type was resolved at compile time. 210 void ResolvedMethod(InvokeType type) { 211 DCHECK_LE(type, kMaxInvokeType); 212 STATS_LOCK(); 213 resolved_methods_[type]++; 214 } 215 216 // Indicate that a method of the given type was unresolved at compile time as it was in an 217 // unknown dex file. 218 void UnresolvedMethod(InvokeType type) { 219 DCHECK_LE(type, kMaxInvokeType); 220 STATS_LOCK(); 221 unresolved_methods_[type]++; 222 } 223 224 // Indicate that a type of virtual method dispatch has been converted into a direct method 225 // dispatch. 226 void VirtualMadeDirect(InvokeType type) { 227 DCHECK(type == kVirtual || type == kInterface || type == kSuper); 228 STATS_LOCK(); 229 virtual_made_direct_[type]++; 230 } 231 232 // Indicate that a method of the given type was able to call directly into boot. 233 void DirectCallsToBoot(InvokeType type) { 234 DCHECK_LE(type, kMaxInvokeType); 235 STATS_LOCK(); 236 direct_calls_to_boot_[type]++; 237 } 238 239 // Indicate that a method of the given type was able to be resolved directly from boot. 240 void DirectMethodsToBoot(InvokeType type) { 241 DCHECK_LE(type, kMaxInvokeType); 242 STATS_LOCK(); 243 direct_methods_to_boot_[type]++; 244 } 245 246 void ProcessedInvoke(InvokeType type, int flags) { 247 STATS_LOCK(); 248 if (flags == 0) { 249 unresolved_methods_[type]++; 250 } else { 251 DCHECK_NE((flags & kFlagMethodResolved), 0); 252 resolved_methods_[type]++; 253 if ((flags & kFlagVirtualMadeDirect) != 0) { 254 virtual_made_direct_[type]++; 255 if ((flags & kFlagPreciseTypeDevirtualization) != 0) { 256 type_based_devirtualization_++; 257 } 258 } else { 259 DCHECK_EQ((flags & kFlagPreciseTypeDevirtualization), 0); 260 } 261 if ((flags & kFlagDirectCallToBoot) != 0) { 262 direct_calls_to_boot_[type]++; 263 } 264 if ((flags & kFlagDirectMethodToBoot) != 0) { 265 direct_methods_to_boot_[type]++; 266 } 267 } 268 } 269 270 // A check-cast could be eliminated due to verifier type analysis. 271 void SafeCast() { 272 STATS_LOCK(); 273 safe_casts_++; 274 } 275 276 // A check-cast couldn't be eliminated due to verifier type analysis. 277 void NotASafeCast() { 278 STATS_LOCK(); 279 not_safe_casts_++; 280 } 281 282 private: 283 Mutex stats_lock_; 284 285 size_t types_in_dex_cache_; 286 size_t types_not_in_dex_cache_; 287 288 size_t strings_in_dex_cache_; 289 size_t strings_not_in_dex_cache_; 290 291 size_t resolved_types_; 292 size_t unresolved_types_; 293 294 size_t resolved_instance_fields_; 295 size_t unresolved_instance_fields_; 296 297 size_t resolved_local_static_fields_; 298 size_t resolved_static_fields_; 299 size_t unresolved_static_fields_; 300 // Type based devirtualization for invoke interface and virtual. 301 size_t type_based_devirtualization_; 302 303 size_t resolved_methods_[kMaxInvokeType + 1]; 304 size_t unresolved_methods_[kMaxInvokeType + 1]; 305 size_t virtual_made_direct_[kMaxInvokeType + 1]; 306 size_t direct_calls_to_boot_[kMaxInvokeType + 1]; 307 size_t direct_methods_to_boot_[kMaxInvokeType + 1]; 308 309 size_t safe_casts_; 310 size_t not_safe_casts_; 311 312 DISALLOW_COPY_AND_ASSIGN(AOTCompilationStats); 313}; 314 315 316extern "C" art::CompiledMethod* ArtCompileDEX(art::CompilerDriver& compiler, 317 const art::DexFile::CodeItem* code_item, 318 uint32_t access_flags, 319 art::InvokeType invoke_type, 320 uint16_t class_def_idx, 321 uint32_t method_idx, 322 jobject class_loader, 323 const art::DexFile& dex_file); 324 325CompilerDriver::CompilerDriver(const CompilerOptions* compiler_options, 326 VerificationResults* verification_results, 327 DexFileToMethodInlinerMap* method_inliner_map, 328 Compiler::Kind compiler_kind, 329 InstructionSet instruction_set, 330 InstructionSetFeatures instruction_set_features, 331 bool image, std::set<std::string>* image_classes, size_t thread_count, 332 bool dump_stats, bool dump_passes, CumulativeLogger* timer, 333 std::string profile_file) 334 : profile_present_(false), compiler_options_(compiler_options), 335 verification_results_(verification_results), 336 method_inliner_map_(method_inliner_map), 337 compiler_(Compiler::Create(this, compiler_kind)), 338 instruction_set_(instruction_set), 339 instruction_set_features_(instruction_set_features), 340 freezing_constructor_lock_("freezing constructor lock"), 341 compiled_classes_lock_("compiled classes lock"), 342 compiled_methods_lock_("compiled method lock"), 343 image_(image), 344 image_classes_(image_classes), 345 thread_count_(thread_count), 346 start_ns_(0), 347 stats_(new AOTCompilationStats), 348 dump_stats_(dump_stats), 349 dump_passes_(dump_passes), 350 timings_logger_(timer), 351 compiler_library_(NULL), 352 compiler_context_(NULL), 353 compiler_enable_auto_elf_loading_(NULL), 354 compiler_get_method_code_addr_(NULL), 355 support_boot_image_fixup_(instruction_set != kMips), 356 dedupe_code_("dedupe code"), 357 dedupe_mapping_table_("dedupe mapping table"), 358 dedupe_vmap_table_("dedupe vmap table"), 359 dedupe_gc_map_("dedupe gc map"), 360 dedupe_cfi_info_("dedupe cfi info") { 361 DCHECK(compiler_options_ != nullptr); 362 DCHECK(verification_results_ != nullptr); 363 DCHECK(method_inliner_map_ != nullptr); 364 365 CHECK_PTHREAD_CALL(pthread_key_create, (&tls_key_, NULL), "compiler tls key"); 366 367 dex_to_dex_compiler_ = reinterpret_cast<DexToDexCompilerFn>(ArtCompileDEX); 368 369 compiler_->Init(); 370 371 CHECK(!Runtime::Current()->IsStarted()); 372 if (image_) { 373 CHECK(image_classes_.get() != nullptr); 374 } else { 375 CHECK(image_classes_.get() == nullptr); 376 } 377 378 // Read the profile file if one is provided. 379 if (!profile_file.empty()) { 380 profile_present_ = profile_file_.LoadFile(profile_file); 381 if (profile_present_) { 382 LOG(INFO) << "Using profile data form file " << profile_file; 383 } else { 384 LOG(INFO) << "Failed to load profile file " << profile_file; 385 } 386 } 387} 388 389std::vector<uint8_t>* CompilerDriver::DeduplicateCode(const std::vector<uint8_t>& code) { 390 return dedupe_code_.Add(Thread::Current(), code); 391} 392 393std::vector<uint8_t>* CompilerDriver::DeduplicateMappingTable(const std::vector<uint8_t>& code) { 394 return dedupe_mapping_table_.Add(Thread::Current(), code); 395} 396 397std::vector<uint8_t>* CompilerDriver::DeduplicateVMapTable(const std::vector<uint8_t>& code) { 398 return dedupe_vmap_table_.Add(Thread::Current(), code); 399} 400 401std::vector<uint8_t>* CompilerDriver::DeduplicateGCMap(const std::vector<uint8_t>& code) { 402 return dedupe_gc_map_.Add(Thread::Current(), code); 403} 404 405std::vector<uint8_t>* CompilerDriver::DeduplicateCFIInfo(const std::vector<uint8_t>* cfi_info) { 406 if (cfi_info == nullptr) { 407 return nullptr; 408 } 409 return dedupe_cfi_info_.Add(Thread::Current(), *cfi_info); 410} 411 412CompilerDriver::~CompilerDriver() { 413 Thread* self = Thread::Current(); 414 { 415 MutexLock mu(self, compiled_classes_lock_); 416 STLDeleteValues(&compiled_classes_); 417 } 418 { 419 MutexLock mu(self, compiled_methods_lock_); 420 STLDeleteValues(&compiled_methods_); 421 } 422 { 423 MutexLock mu(self, compiled_methods_lock_); 424 STLDeleteElements(&code_to_patch_); 425 } 426 { 427 MutexLock mu(self, compiled_methods_lock_); 428 STLDeleteElements(&methods_to_patch_); 429 } 430 { 431 MutexLock mu(self, compiled_methods_lock_); 432 STLDeleteElements(&classes_to_patch_); 433 } 434 CHECK_PTHREAD_CALL(pthread_key_delete, (tls_key_), "delete tls key"); 435 compiler_->UnInit(); 436} 437 438CompilerTls* CompilerDriver::GetTls() { 439 // Lazily create thread-local storage 440 CompilerTls* res = static_cast<CompilerTls*>(pthread_getspecific(tls_key_)); 441 if (res == NULL) { 442 res = new CompilerTls(); 443 CHECK_PTHREAD_CALL(pthread_setspecific, (tls_key_, res), "compiler tls"); 444 } 445 return res; 446} 447 448#define CREATE_TRAMPOLINE(type, abi, offset) \ 449 if (Is64BitInstructionSet(instruction_set_)) { \ 450 return CreateTrampoline64(instruction_set_, abi, \ 451 type ## _ENTRYPOINT_OFFSET(8, offset)); \ 452 } else { \ 453 return CreateTrampoline32(instruction_set_, abi, \ 454 type ## _ENTRYPOINT_OFFSET(4, offset)); \ 455 } 456 457const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToInterpreterBridge() const { 458 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToInterpreterBridge) 459} 460 461const std::vector<uint8_t>* CompilerDriver::CreateInterpreterToCompiledCodeBridge() const { 462 CREATE_TRAMPOLINE(INTERPRETER, kInterpreterAbi, pInterpreterToCompiledCodeBridge) 463} 464 465const std::vector<uint8_t>* CompilerDriver::CreateJniDlsymLookup() const { 466 CREATE_TRAMPOLINE(JNI, kJniAbi, pDlsymLookup) 467} 468 469const std::vector<uint8_t>* CompilerDriver::CreatePortableImtConflictTrampoline() const { 470 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableImtConflictTrampoline) 471} 472 473const std::vector<uint8_t>* CompilerDriver::CreatePortableResolutionTrampoline() const { 474 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableResolutionTrampoline) 475} 476 477const std::vector<uint8_t>* CompilerDriver::CreatePortableToInterpreterBridge() const { 478 CREATE_TRAMPOLINE(PORTABLE, kPortableAbi, pPortableToInterpreterBridge) 479} 480 481const std::vector<uint8_t>* CompilerDriver::CreateQuickGenericJniTrampoline() const { 482 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickGenericJniTrampoline) 483} 484 485const std::vector<uint8_t>* CompilerDriver::CreateQuickImtConflictTrampoline() const { 486 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickImtConflictTrampoline) 487} 488 489const std::vector<uint8_t>* CompilerDriver::CreateQuickResolutionTrampoline() const { 490 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickResolutionTrampoline) 491} 492 493const std::vector<uint8_t>* CompilerDriver::CreateQuickToInterpreterBridge() const { 494 CREATE_TRAMPOLINE(QUICK, kQuickAbi, pQuickToInterpreterBridge) 495} 496#undef CREATE_TRAMPOLINE 497 498void CompilerDriver::CompileAll(jobject class_loader, 499 const std::vector<const DexFile*>& dex_files, 500 TimingLogger* timings) { 501 DCHECK(!Runtime::Current()->IsStarted()); 502 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", thread_count_ - 1)); 503 PreCompile(class_loader, dex_files, thread_pool.get(), timings); 504 Compile(class_loader, dex_files, thread_pool.get(), timings); 505 if (dump_stats_) { 506 stats_->Dump(); 507 } 508} 509 510static DexToDexCompilationLevel GetDexToDexCompilationlevel( 511 Thread* self, Handle<mirror::ClassLoader> class_loader, const DexFile& dex_file, 512 const DexFile::ClassDef& class_def) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 513 const char* descriptor = dex_file.GetClassDescriptor(class_def); 514 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 515 mirror::Class* klass = class_linker->FindClass(self, descriptor, class_loader); 516 if (klass == NULL) { 517 CHECK(self->IsExceptionPending()); 518 self->ClearException(); 519 return kDontDexToDexCompile; 520 } 521 // The verifier can only run on "quick" instructions at runtime (see usage of 522 // FindAccessedFieldAtDexPc and FindInvokedMethodAtDexPc in ThrowNullPointerExceptionFromDexPC 523 // function). Since image classes can be verified again while compiling an application, 524 // we must prevent the DEX-to-DEX compiler from introducing them. 525 // TODO: find a way to enable "quick" instructions for image classes and remove this check. 526 bool compiling_image_classes = class_loader.Get() == nullptr; 527 if (compiling_image_classes) { 528 return kRequired; 529 } else if (klass->IsVerified()) { 530 // Class is verified so we can enable DEX-to-DEX compilation for performance. 531 return kOptimize; 532 } else if (klass->IsCompileTimeVerified()) { 533 // Class verification has soft-failed. Anyway, ensure at least correctness. 534 DCHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); 535 return kRequired; 536 } else { 537 // Class verification has failed: do not run DEX-to-DEX compilation. 538 return kDontDexToDexCompile; 539 } 540} 541 542void CompilerDriver::CompileOne(mirror::ArtMethod* method, TimingLogger* timings) { 543 DCHECK(!Runtime::Current()->IsStarted()); 544 Thread* self = Thread::Current(); 545 jobject jclass_loader; 546 const DexFile* dex_file; 547 uint16_t class_def_idx; 548 uint32_t method_idx = method->GetDexMethodIndex(); 549 uint32_t access_flags = method->GetAccessFlags(); 550 InvokeType invoke_type = method->GetInvokeType(); 551 { 552 ScopedObjectAccessUnchecked soa(self); 553 ScopedLocalRef<jobject> 554 local_class_loader(soa.Env(), 555 soa.AddLocalReference<jobject>(method->GetDeclaringClass()->GetClassLoader())); 556 jclass_loader = soa.Env()->NewGlobalRef(local_class_loader.get()); 557 // Find the dex_file 558 dex_file = method->GetDexFile(); 559 class_def_idx = method->GetClassDefIndex(); 560 } 561 const DexFile::CodeItem* code_item = dex_file->GetCodeItem(method->GetCodeItemOffset()); 562 self->TransitionFromRunnableToSuspended(kNative); 563 564 std::vector<const DexFile*> dex_files; 565 dex_files.push_back(dex_file); 566 567 std::unique_ptr<ThreadPool> thread_pool(new ThreadPool("Compiler driver thread pool", 0U)); 568 PreCompile(jclass_loader, dex_files, thread_pool.get(), timings); 569 570 // Can we run DEX-to-DEX compiler on this class ? 571 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 572 { 573 ScopedObjectAccess soa(Thread::Current()); 574 const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_idx); 575 StackHandleScope<1> hs(soa.Self()); 576 Handle<mirror::ClassLoader> class_loader( 577 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 578 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(self, class_loader, *dex_file, 579 class_def); 580 } 581 CompileMethod(code_item, access_flags, invoke_type, class_def_idx, method_idx, jclass_loader, 582 *dex_file, dex_to_dex_compilation_level); 583 584 self->GetJniEnv()->DeleteGlobalRef(jclass_loader); 585 586 self->TransitionFromSuspendedToRunnable(); 587} 588 589void CompilerDriver::Resolve(jobject class_loader, const std::vector<const DexFile*>& dex_files, 590 ThreadPool* thread_pool, TimingLogger* timings) { 591 for (size_t i = 0; i != dex_files.size(); ++i) { 592 const DexFile* dex_file = dex_files[i]; 593 CHECK(dex_file != nullptr); 594 ResolveDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 595 } 596} 597 598void CompilerDriver::PreCompile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 599 ThreadPool* thread_pool, TimingLogger* timings) { 600 LoadImageClasses(timings); 601 602 if (!compiler_options_->IsVerificationEnabled()) { 603 VLOG(compiler) << "Verify none mode specified, skipping pre-compilation"; 604 return; 605 } 606 607 Resolve(class_loader, dex_files, thread_pool, timings); 608 609 Verify(class_loader, dex_files, thread_pool, timings); 610 611 InitializeClasses(class_loader, dex_files, thread_pool, timings); 612 613 UpdateImageClasses(timings); 614} 615 616bool CompilerDriver::IsImageClass(const char* descriptor) const { 617 if (!IsImage()) { 618 return true; 619 } else { 620 return image_classes_->find(descriptor) != image_classes_->end(); 621 } 622} 623 624static void ResolveExceptionsForMethod(MethodHelper* mh, 625 std::set<std::pair<uint16_t, const DexFile*>>& exceptions_to_resolve) 626 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 627 const DexFile::CodeItem* code_item = mh->GetMethod()->GetCodeItem(); 628 if (code_item == NULL) { 629 return; // native or abstract method 630 } 631 if (code_item->tries_size_ == 0) { 632 return; // nothing to process 633 } 634 const byte* encoded_catch_handler_list = DexFile::GetCatchHandlerData(*code_item, 0); 635 size_t num_encoded_catch_handlers = DecodeUnsignedLeb128(&encoded_catch_handler_list); 636 for (size_t i = 0; i < num_encoded_catch_handlers; i++) { 637 int32_t encoded_catch_handler_size = DecodeSignedLeb128(&encoded_catch_handler_list); 638 bool has_catch_all = false; 639 if (encoded_catch_handler_size <= 0) { 640 encoded_catch_handler_size = -encoded_catch_handler_size; 641 has_catch_all = true; 642 } 643 for (int32_t j = 0; j < encoded_catch_handler_size; j++) { 644 uint16_t encoded_catch_handler_handlers_type_idx = 645 DecodeUnsignedLeb128(&encoded_catch_handler_list); 646 // Add to set of types to resolve if not already in the dex cache resolved types 647 if (!mh->GetMethod()->IsResolvedTypeIdx(encoded_catch_handler_handlers_type_idx)) { 648 exceptions_to_resolve.insert( 649 std::pair<uint16_t, const DexFile*>(encoded_catch_handler_handlers_type_idx, 650 mh->GetMethod()->GetDexFile())); 651 } 652 // ignore address associated with catch handler 653 DecodeUnsignedLeb128(&encoded_catch_handler_list); 654 } 655 if (has_catch_all) { 656 // ignore catch all address 657 DecodeUnsignedLeb128(&encoded_catch_handler_list); 658 } 659 } 660} 661 662static bool ResolveCatchBlockExceptionsClassVisitor(mirror::Class* c, void* arg) 663 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 664 std::set<std::pair<uint16_t, const DexFile*>>* exceptions_to_resolve = 665 reinterpret_cast<std::set<std::pair<uint16_t, const DexFile*>>*>(arg); 666 StackHandleScope<1> hs(Thread::Current()); 667 MethodHelper mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); 668 for (size_t i = 0; i < c->NumVirtualMethods(); ++i) { 669 mh.ChangeMethod(c->GetVirtualMethod(i)); 670 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 671 } 672 for (size_t i = 0; i < c->NumDirectMethods(); ++i) { 673 mh.ChangeMethod(c->GetDirectMethod(i)); 674 ResolveExceptionsForMethod(&mh, *exceptions_to_resolve); 675 } 676 return true; 677} 678 679static bool RecordImageClassesVisitor(mirror::Class* klass, void* arg) 680 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 681 std::set<std::string>* image_classes = reinterpret_cast<std::set<std::string>*>(arg); 682 std::string temp; 683 image_classes->insert(klass->GetDescriptor(&temp)); 684 return true; 685} 686 687// Make a list of descriptors for classes to include in the image 688void CompilerDriver::LoadImageClasses(TimingLogger* timings) 689 LOCKS_EXCLUDED(Locks::mutator_lock_) { 690 CHECK(timings != nullptr); 691 if (!IsImage()) { 692 return; 693 } 694 695 TimingLogger::ScopedTiming t("LoadImageClasses", timings); 696 // Make a first class to load all classes explicitly listed in the file 697 Thread* self = Thread::Current(); 698 ScopedObjectAccess soa(self); 699 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 700 CHECK(image_classes_.get() != nullptr); 701 for (auto it = image_classes_->begin(), end = image_classes_->end(); it != end;) { 702 const std::string& descriptor(*it); 703 StackHandleScope<1> hs(self); 704 Handle<mirror::Class> klass( 705 hs.NewHandle(class_linker->FindSystemClass(self, descriptor.c_str()))); 706 if (klass.Get() == NULL) { 707 VLOG(compiler) << "Failed to find class " << descriptor; 708 image_classes_->erase(it++); 709 self->ClearException(); 710 } else { 711 ++it; 712 } 713 } 714 715 // Resolve exception classes referenced by the loaded classes. The catch logic assumes 716 // exceptions are resolved by the verifier when there is a catch block in an interested method. 717 // Do this here so that exception classes appear to have been specified image classes. 718 std::set<std::pair<uint16_t, const DexFile*>> unresolved_exception_types; 719 StackHandleScope<1> hs(self); 720 Handle<mirror::Class> java_lang_Throwable( 721 hs.NewHandle(class_linker->FindSystemClass(self, "Ljava/lang/Throwable;"))); 722 do { 723 unresolved_exception_types.clear(); 724 class_linker->VisitClasses(ResolveCatchBlockExceptionsClassVisitor, 725 &unresolved_exception_types); 726 for (const std::pair<uint16_t, const DexFile*>& exception_type : unresolved_exception_types) { 727 uint16_t exception_type_idx = exception_type.first; 728 const DexFile* dex_file = exception_type.second; 729 StackHandleScope<2> hs(self); 730 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(*dex_file))); 731 Handle<mirror::Class> klass(hs.NewHandle( 732 class_linker->ResolveType(*dex_file, exception_type_idx, dex_cache, 733 NullHandle<mirror::ClassLoader>()))); 734 if (klass.Get() == NULL) { 735 const DexFile::TypeId& type_id = dex_file->GetTypeId(exception_type_idx); 736 const char* descriptor = dex_file->GetTypeDescriptor(type_id); 737 LOG(FATAL) << "Failed to resolve class " << descriptor; 738 } 739 DCHECK(java_lang_Throwable->IsAssignableFrom(klass.Get())); 740 } 741 // Resolving exceptions may load classes that reference more exceptions, iterate until no 742 // more are found 743 } while (!unresolved_exception_types.empty()); 744 745 // We walk the roots looking for classes so that we'll pick up the 746 // above classes plus any classes them depend on such super 747 // classes, interfaces, and the required ClassLinker roots. 748 class_linker->VisitClasses(RecordImageClassesVisitor, image_classes_.get()); 749 750 CHECK_NE(image_classes_->size(), 0U); 751} 752 753static void MaybeAddToImageClasses(Handle<mirror::Class> c, std::set<std::string>* image_classes) 754 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 755 Thread* self = Thread::Current(); 756 StackHandleScope<1> hs(self); 757 // Make a copy of the handle so that we don't clobber it doing Assign. 758 Handle<mirror::Class> klass(hs.NewHandle(c.Get())); 759 std::string temp; 760 while (!klass->IsObjectClass()) { 761 const char* descriptor = klass->GetDescriptor(&temp); 762 std::pair<std::set<std::string>::iterator, bool> result = image_classes->insert(descriptor); 763 if (!result.second) { // Previously inserted. 764 break; 765 } 766 VLOG(compiler) << "Adding " << descriptor << " to image classes"; 767 for (size_t i = 0; i < klass->NumDirectInterfaces(); ++i) { 768 StackHandleScope<1> hs(self); 769 MaybeAddToImageClasses(hs.NewHandle(mirror::Class::GetDirectInterface(self, klass, i)), 770 image_classes); 771 } 772 if (klass->IsArrayClass()) { 773 StackHandleScope<1> hs(self); 774 MaybeAddToImageClasses(hs.NewHandle(klass->GetComponentType()), image_classes); 775 } 776 klass.Assign(klass->GetSuperClass()); 777 } 778} 779 780void CompilerDriver::FindClinitImageClassesCallback(mirror::Object* object, void* arg) { 781 DCHECK(object != NULL); 782 DCHECK(arg != NULL); 783 CompilerDriver* compiler_driver = reinterpret_cast<CompilerDriver*>(arg); 784 StackHandleScope<1> hs(Thread::Current()); 785 MaybeAddToImageClasses(hs.NewHandle(object->GetClass()), compiler_driver->image_classes_.get()); 786} 787 788void CompilerDriver::UpdateImageClasses(TimingLogger* timings) { 789 if (IsImage()) { 790 TimingLogger::ScopedTiming t("UpdateImageClasses", timings); 791 // Update image_classes_ with classes for objects created by <clinit> methods. 792 Thread* self = Thread::Current(); 793 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter"); 794 gc::Heap* heap = Runtime::Current()->GetHeap(); 795 // TODO: Image spaces only? 796 ScopedObjectAccess soa(Thread::Current()); 797 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_); 798 heap->VisitObjects(FindClinitImageClassesCallback, this); 799 self->EndAssertNoThreadSuspension(old_cause); 800 } 801} 802 803bool CompilerDriver::CanAssumeTypeIsPresentInDexCache(const DexFile& dex_file, uint32_t type_idx) { 804 if (IsImage() && 805 IsImageClass(dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_))) { 806 { 807 ScopedObjectAccess soa(Thread::Current()); 808 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 809 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 810 if (resolved_class == nullptr) { 811 // Erroneous class. 812 stats_->TypeNotInDexCache(); 813 return false; 814 } 815 } 816 stats_->TypeInDexCache(); 817 return true; 818 } else { 819 stats_->TypeNotInDexCache(); 820 return false; 821 } 822} 823 824bool CompilerDriver::CanAssumeStringIsPresentInDexCache(const DexFile& dex_file, 825 uint32_t string_idx) { 826 // See also Compiler::ResolveDexFile 827 828 bool result = false; 829 if (IsImage()) { 830 // We resolve all const-string strings when building for the image. 831 ScopedObjectAccess soa(Thread::Current()); 832 StackHandleScope<1> hs(soa.Self()); 833 Handle<mirror::DexCache> dex_cache( 834 hs.NewHandle(Runtime::Current()->GetClassLinker()->FindDexCache(dex_file))); 835 Runtime::Current()->GetClassLinker()->ResolveString(dex_file, string_idx, dex_cache); 836 result = true; 837 } 838 if (result) { 839 stats_->StringInDexCache(); 840 } else { 841 stats_->StringNotInDexCache(); 842 } 843 return result; 844} 845 846bool CompilerDriver::CanAccessTypeWithoutChecks(uint32_t referrer_idx, const DexFile& dex_file, 847 uint32_t type_idx, 848 bool* type_known_final, bool* type_known_abstract, 849 bool* equals_referrers_class) { 850 if (type_known_final != NULL) { 851 *type_known_final = false; 852 } 853 if (type_known_abstract != NULL) { 854 *type_known_abstract = false; 855 } 856 if (equals_referrers_class != NULL) { 857 *equals_referrers_class = false; 858 } 859 ScopedObjectAccess soa(Thread::Current()); 860 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 861 // Get type from dex cache assuming it was populated by the verifier 862 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 863 if (resolved_class == NULL) { 864 stats_->TypeNeedsAccessCheck(); 865 return false; // Unknown class needs access checks. 866 } 867 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 868 if (equals_referrers_class != NULL) { 869 *equals_referrers_class = (method_id.class_idx_ == type_idx); 870 } 871 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 872 if (referrer_class == NULL) { 873 stats_->TypeNeedsAccessCheck(); 874 return false; // Incomplete referrer knowledge needs access check. 875 } 876 // Perform access check, will return true if access is ok or false if we're going to have to 877 // check this at runtime (for example for class loaders). 878 bool result = referrer_class->CanAccess(resolved_class); 879 if (result) { 880 stats_->TypeDoesntNeedAccessCheck(); 881 if (type_known_final != NULL) { 882 *type_known_final = resolved_class->IsFinal() && !resolved_class->IsArrayClass(); 883 } 884 if (type_known_abstract != NULL) { 885 *type_known_abstract = resolved_class->IsAbstract() && !resolved_class->IsArrayClass(); 886 } 887 } else { 888 stats_->TypeNeedsAccessCheck(); 889 } 890 return result; 891} 892 893bool CompilerDriver::CanAccessInstantiableTypeWithoutChecks(uint32_t referrer_idx, 894 const DexFile& dex_file, 895 uint32_t type_idx) { 896 ScopedObjectAccess soa(Thread::Current()); 897 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 898 // Get type from dex cache assuming it was populated by the verifier. 899 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 900 if (resolved_class == NULL) { 901 stats_->TypeNeedsAccessCheck(); 902 return false; // Unknown class needs access checks. 903 } 904 const DexFile::MethodId& method_id = dex_file.GetMethodId(referrer_idx); 905 mirror::Class* referrer_class = dex_cache->GetResolvedType(method_id.class_idx_); 906 if (referrer_class == NULL) { 907 stats_->TypeNeedsAccessCheck(); 908 return false; // Incomplete referrer knowledge needs access check. 909 } 910 // Perform access and instantiable checks, will return true if access is ok or false if we're 911 // going to have to check this at runtime (for example for class loaders). 912 bool result = referrer_class->CanAccess(resolved_class) && resolved_class->IsInstantiable(); 913 if (result) { 914 stats_->TypeDoesntNeedAccessCheck(); 915 } else { 916 stats_->TypeNeedsAccessCheck(); 917 } 918 return result; 919} 920 921bool CompilerDriver::CanEmbedTypeInCode(const DexFile& dex_file, uint32_t type_idx, 922 bool* is_type_initialized, bool* use_direct_type_ptr, 923 uintptr_t* direct_type_ptr, bool* out_is_finalizable) { 924 ScopedObjectAccess soa(Thread::Current()); 925 mirror::DexCache* dex_cache = Runtime::Current()->GetClassLinker()->FindDexCache(dex_file); 926 mirror::Class* resolved_class = dex_cache->GetResolvedType(type_idx); 927 if (resolved_class == nullptr) { 928 return false; 929 } 930 *out_is_finalizable = resolved_class->IsFinalizable(); 931 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 932 const bool support_boot_image_fixup = GetSupportBootImageFixup(); 933 if (compiling_boot) { 934 // boot -> boot class pointers. 935 // True if the class is in the image at boot compiling time. 936 const bool is_image_class = IsImage() && IsImageClass( 937 dex_file.StringDataByIdx(dex_file.GetTypeId(type_idx).descriptor_idx_)); 938 // True if pc relative load works. 939 if (is_image_class && support_boot_image_fixup) { 940 *is_type_initialized = resolved_class->IsInitialized(); 941 *use_direct_type_ptr = false; 942 *direct_type_ptr = 0; 943 return true; 944 } else { 945 return false; 946 } 947 } else { 948 // True if the class is in the image at app compiling time. 949 const bool class_in_image = 950 Runtime::Current()->GetHeap()->FindSpaceFromObject(resolved_class, false)->IsImageSpace(); 951 if (class_in_image && support_boot_image_fixup) { 952 // boot -> app class pointers. 953 *is_type_initialized = resolved_class->IsInitialized(); 954 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 955 *use_direct_type_ptr = !GetCompilerOptions().GetIncludePatchInformation(); 956 *direct_type_ptr = reinterpret_cast<uintptr_t>(resolved_class); 957 return true; 958 } else { 959 // app -> app class pointers. 960 // Give up because app does not have an image and class 961 // isn't created at compile time. TODO: implement this 962 // if/when each app gets an image. 963 return false; 964 } 965 } 966} 967 968bool CompilerDriver::CanEmbedReferenceTypeInCode(ClassReference* ref, 969 bool* use_direct_ptr, 970 uintptr_t* direct_type_ptr) { 971 CHECK(ref != nullptr); 972 CHECK(use_direct_ptr != nullptr); 973 CHECK(direct_type_ptr != nullptr); 974 975 ScopedObjectAccess soa(Thread::Current()); 976 mirror::Class* reference_class = mirror::Reference::GetJavaLangRefReference(); 977 bool is_initialized; 978 bool unused_finalizable; 979 // Make sure we have a finished Reference class object before attempting to use it. 980 if (!CanEmbedTypeInCode(*reference_class->GetDexCache()->GetDexFile(), 981 reference_class->GetDexTypeIndex(), &is_initialized, 982 use_direct_ptr, direct_type_ptr, &unused_finalizable) || 983 !is_initialized) { 984 return false; 985 } 986 ref->first = &reference_class->GetDexFile(); 987 ref->second = reference_class->GetDexClassDefIndex(); 988 return true; 989} 990 991uint32_t CompilerDriver::GetReferenceSlowFlagOffset() const { 992 ScopedObjectAccess soa(Thread::Current()); 993 mirror::Class* klass = mirror::Reference::GetJavaLangRefReference(); 994 DCHECK(klass->IsInitialized()); 995 return klass->GetSlowPathFlagOffset().Uint32Value(); 996} 997 998uint32_t CompilerDriver::GetReferenceDisableFlagOffset() const { 999 ScopedObjectAccess soa(Thread::Current()); 1000 mirror::Class* klass = mirror::Reference::GetJavaLangRefReference(); 1001 DCHECK(klass->IsInitialized()); 1002 return klass->GetDisableIntrinsicFlagOffset().Uint32Value(); 1003} 1004 1005void CompilerDriver::ProcessedInstanceField(bool resolved) { 1006 if (!resolved) { 1007 stats_->UnresolvedInstanceField(); 1008 } else { 1009 stats_->ResolvedInstanceField(); 1010 } 1011} 1012 1013void CompilerDriver::ProcessedStaticField(bool resolved, bool local) { 1014 if (!resolved) { 1015 stats_->UnresolvedStaticField(); 1016 } else if (local) { 1017 stats_->ResolvedLocalStaticField(); 1018 } else { 1019 stats_->ResolvedStaticField(); 1020 } 1021} 1022 1023void CompilerDriver::ProcessedInvoke(InvokeType invoke_type, int flags) { 1024 stats_->ProcessedInvoke(invoke_type, flags); 1025} 1026 1027mirror::ArtField* CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, 1028 const DexCompilationUnit* mUnit, 1029 bool is_put, 1030 const ScopedObjectAccess& soa) { 1031 // Try to resolve the field and compiling method's class. 1032 mirror::ArtField* resolved_field; 1033 mirror::Class* referrer_class; 1034 mirror::DexCache* dex_cache; 1035 { 1036 StackHandleScope<3> hs(soa.Self()); 1037 Handle<mirror::DexCache> dex_cache_handle( 1038 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1039 Handle<mirror::ClassLoader> class_loader_handle( 1040 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1041 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1042 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, false))); 1043 referrer_class = (resolved_field_handle.Get() != nullptr) 1044 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1045 resolved_field = resolved_field_handle.Get(); 1046 dex_cache = dex_cache_handle.Get(); 1047 } 1048 bool can_link = false; 1049 if (resolved_field != nullptr && referrer_class != nullptr) { 1050 std::pair<bool, bool> fast_path = IsFastInstanceField( 1051 dex_cache, referrer_class, resolved_field, field_idx); 1052 can_link = is_put ? fast_path.second : fast_path.first; 1053 } 1054 ProcessedInstanceField(can_link); 1055 return can_link ? resolved_field : nullptr; 1056} 1057 1058bool CompilerDriver::ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1059 bool is_put, MemberOffset* field_offset, 1060 bool* is_volatile) { 1061 ScopedObjectAccess soa(Thread::Current()); 1062 StackHandleScope<1> hs(soa.Self()); 1063 Handle<mirror::ArtField> resolved_field = 1064 hs.NewHandle(ComputeInstanceFieldInfo(field_idx, mUnit, is_put, soa)); 1065 1066 if (resolved_field.Get() == nullptr) { 1067 // Conservative defaults. 1068 *is_volatile = true; 1069 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1070 return false; 1071 } else { 1072 *is_volatile = resolved_field->IsVolatile(); 1073 *field_offset = resolved_field->GetOffset(); 1074 return true; 1075 } 1076} 1077 1078bool CompilerDriver::ComputeStaticFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, 1079 bool is_put, MemberOffset* field_offset, 1080 uint32_t* storage_index, bool* is_referrers_class, 1081 bool* is_volatile, bool* is_initialized) { 1082 ScopedObjectAccess soa(Thread::Current()); 1083 // Try to resolve the field and compiling method's class. 1084 mirror::ArtField* resolved_field; 1085 mirror::Class* referrer_class; 1086 mirror::DexCache* dex_cache; 1087 { 1088 StackHandleScope<3> hs(soa.Self()); 1089 Handle<mirror::DexCache> dex_cache_handle( 1090 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1091 Handle<mirror::ClassLoader> class_loader_handle( 1092 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1093 Handle<mirror::ArtField> resolved_field_handle(hs.NewHandle( 1094 ResolveField(soa, dex_cache_handle, class_loader_handle, mUnit, field_idx, true))); 1095 referrer_class = (resolved_field_handle.Get() != nullptr) 1096 ? ResolveCompilingMethodsClass(soa, dex_cache_handle, class_loader_handle, mUnit) : nullptr; 1097 resolved_field = resolved_field_handle.Get(); 1098 dex_cache = dex_cache_handle.Get(); 1099 } 1100 bool result = false; 1101 if (resolved_field != nullptr && referrer_class != nullptr) { 1102 *is_volatile = IsFieldVolatile(resolved_field); 1103 std::pair<bool, bool> fast_path = IsFastStaticField( 1104 dex_cache, referrer_class, resolved_field, field_idx, field_offset, 1105 storage_index, is_referrers_class, is_initialized); 1106 result = is_put ? fast_path.second : fast_path.first; 1107 } 1108 if (!result) { 1109 // Conservative defaults. 1110 *is_volatile = true; 1111 *field_offset = MemberOffset(static_cast<size_t>(-1)); 1112 *storage_index = -1; 1113 *is_referrers_class = false; 1114 *is_initialized = false; 1115 } 1116 ProcessedStaticField(result, *is_referrers_class); 1117 return result; 1118} 1119 1120void CompilerDriver::GetCodeAndMethodForDirectCall(InvokeType* type, InvokeType sharp_type, 1121 bool no_guarantee_of_dex_cache_entry, 1122 mirror::Class* referrer_class, 1123 mirror::ArtMethod* method, 1124 int* stats_flags, 1125 MethodReference* target_method, 1126 uintptr_t* direct_code, 1127 uintptr_t* direct_method) { 1128 // For direct and static methods compute possible direct_code and direct_method values, ie 1129 // an address for the Method* being invoked and an address of the code for that Method*. 1130 // For interface calls compute a value for direct_method that is the interface method being 1131 // invoked, so this can be passed to the out-of-line runtime support code. 1132 *direct_code = 0; 1133 *direct_method = 0; 1134 bool use_dex_cache = false; 1135 const bool compiling_boot = Runtime::Current()->GetHeap()->IsCompilingBoot(); 1136 // TODO This is somewhat hacky. We should refactor all of this invoke codepath. 1137 const bool force_relocations = (compiling_boot || 1138 GetCompilerOptions().GetIncludePatchInformation()); 1139 if (compiler_->IsPortable()) { 1140 if (sharp_type != kStatic && sharp_type != kDirect) { 1141 return; 1142 } 1143 use_dex_cache = true; 1144 } else { 1145 if (sharp_type != kStatic && sharp_type != kDirect) { 1146 return; 1147 } 1148 // TODO: support patching on all architectures. 1149 use_dex_cache = force_relocations && !support_boot_image_fixup_; 1150 } 1151 bool method_code_in_boot = (method->GetDeclaringClass()->GetClassLoader() == nullptr); 1152 if (!use_dex_cache) { 1153 if (!method_code_in_boot) { 1154 use_dex_cache = true; 1155 } else { 1156 bool has_clinit_trampoline = 1157 method->IsStatic() && !method->GetDeclaringClass()->IsInitialized(); 1158 if (has_clinit_trampoline && (method->GetDeclaringClass() != referrer_class)) { 1159 // Ensure we run the clinit trampoline unless we are invoking a static method in the same 1160 // class. 1161 use_dex_cache = true; 1162 } 1163 } 1164 } 1165 if (method_code_in_boot) { 1166 *stats_flags |= kFlagDirectCallToBoot | kFlagDirectMethodToBoot; 1167 } 1168 if (!use_dex_cache && force_relocations) { 1169 if (!IsImage() || !IsImageClass(method->GetDeclaringClassDescriptor())) { 1170 // We can only branch directly to Methods that are resolved in the DexCache. 1171 // Otherwise we won't invoke the resolution trampoline. 1172 use_dex_cache = true; 1173 } 1174 } 1175 // The method is defined not within this dex file. We need a dex cache slot within the current 1176 // dex file or direct pointers. 1177 bool must_use_direct_pointers = false; 1178 if (target_method->dex_file == method->GetDeclaringClass()->GetDexCache()->GetDexFile()) { 1179 target_method->dex_method_index = method->GetDexMethodIndex(); 1180 } else { 1181 if (no_guarantee_of_dex_cache_entry) { 1182 StackHandleScope<1> hs(Thread::Current()); 1183 MethodHelper mh(hs.NewHandle(method)); 1184 // See if the method is also declared in this dex cache. 1185 uint32_t dex_method_idx = mh.FindDexMethodIndexInOtherDexFile( 1186 *target_method->dex_file, target_method->dex_method_index); 1187 if (dex_method_idx != DexFile::kDexNoIndex) { 1188 target_method->dex_method_index = dex_method_idx; 1189 } else { 1190 if (force_relocations && !use_dex_cache) { 1191 target_method->dex_method_index = method->GetDexMethodIndex(); 1192 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1193 } 1194 must_use_direct_pointers = true; 1195 } 1196 } 1197 } 1198 if (use_dex_cache) { 1199 if (must_use_direct_pointers) { 1200 // Fail. Test above showed the only safe dispatch was via the dex cache, however, the direct 1201 // pointers are required as the dex cache lacks an appropriate entry. 1202 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1203 } else { 1204 *type = sharp_type; 1205 } 1206 } else { 1207 bool method_in_image = 1208 Runtime::Current()->GetHeap()->FindSpaceFromObject(method, false)->IsImageSpace(); 1209 if (method_in_image || compiling_boot) { 1210 // We know we must be able to get to the method in the image, so use that pointer. 1211 CHECK(!method->IsAbstract()); 1212 *type = sharp_type; 1213 *direct_method = force_relocations ? -1 : reinterpret_cast<uintptr_t>(method); 1214 *direct_code = force_relocations ? -1 : compiler_->GetEntryPointOf(method); 1215 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1216 target_method->dex_method_index = method->GetDexMethodIndex(); 1217 } else if (!must_use_direct_pointers) { 1218 // Set the code and rely on the dex cache for the method. 1219 *type = sharp_type; 1220 if (force_relocations) { 1221 *direct_code = -1; 1222 target_method->dex_file = method->GetDeclaringClass()->GetDexCache()->GetDexFile(); 1223 target_method->dex_method_index = method->GetDexMethodIndex(); 1224 } else { 1225 *direct_code = compiler_->GetEntryPointOf(method); 1226 } 1227 } else { 1228 // Direct pointers were required but none were available. 1229 VLOG(compiler) << "Dex cache devirtualization failed for: " << PrettyMethod(method); 1230 } 1231 } 1232} 1233 1234bool CompilerDriver::ComputeInvokeInfo(const DexCompilationUnit* mUnit, const uint32_t dex_pc, 1235 bool update_stats, bool enable_devirtualization, 1236 InvokeType* invoke_type, MethodReference* target_method, 1237 int* vtable_idx, uintptr_t* direct_code, 1238 uintptr_t* direct_method) { 1239 InvokeType orig_invoke_type = *invoke_type; 1240 int stats_flags = 0; 1241 ScopedObjectAccess soa(Thread::Current()); 1242 // Try to resolve the method and compiling method's class. 1243 mirror::ArtMethod* resolved_method; 1244 mirror::Class* referrer_class; 1245 StackHandleScope<3> hs(soa.Self()); 1246 Handle<mirror::DexCache> dex_cache( 1247 hs.NewHandle(mUnit->GetClassLinker()->FindDexCache(*mUnit->GetDexFile()))); 1248 Handle<mirror::ClassLoader> class_loader(hs.NewHandle( 1249 soa.Decode<mirror::ClassLoader*>(mUnit->GetClassLoader()))); 1250 { 1251 uint32_t method_idx = target_method->dex_method_index; 1252 Handle<mirror::ArtMethod> resolved_method_handle(hs.NewHandle( 1253 ResolveMethod(soa, dex_cache, class_loader, mUnit, method_idx, orig_invoke_type))); 1254 referrer_class = (resolved_method_handle.Get() != nullptr) 1255 ? ResolveCompilingMethodsClass(soa, dex_cache, class_loader, mUnit) : nullptr; 1256 resolved_method = resolved_method_handle.Get(); 1257 } 1258 bool result = false; 1259 if (resolved_method != nullptr) { 1260 *vtable_idx = GetResolvedMethodVTableIndex(resolved_method, orig_invoke_type); 1261 1262 if (enable_devirtualization) { 1263 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1264 const MethodReference* devirt_target = mUnit->GetVerifiedMethod()->GetDevirtTarget(dex_pc); 1265 1266 stats_flags = IsFastInvoke( 1267 soa, dex_cache, class_loader, mUnit, referrer_class, resolved_method, 1268 invoke_type, target_method, devirt_target, direct_code, direct_method); 1269 result = stats_flags != 0; 1270 } else { 1271 // Devirtualization not enabled. Inline IsFastInvoke(), dropping the devirtualization parts. 1272 if (UNLIKELY(referrer_class == nullptr) || 1273 UNLIKELY(!referrer_class->CanAccessResolvedMethod(resolved_method->GetDeclaringClass(), 1274 resolved_method, dex_cache.Get(), 1275 target_method->dex_method_index)) || 1276 *invoke_type == kSuper) { 1277 // Slow path. (Without devirtualization, all super calls go slow path as well.) 1278 } else { 1279 // Sharpening failed so generate a regular resolved method dispatch. 1280 stats_flags = kFlagMethodResolved; 1281 GetCodeAndMethodForDirectCall(invoke_type, *invoke_type, false, referrer_class, resolved_method, 1282 &stats_flags, target_method, direct_code, direct_method); 1283 result = true; 1284 } 1285 } 1286 } 1287 if (!result) { 1288 // Conservative defaults. 1289 *vtable_idx = -1; 1290 *direct_code = 0u; 1291 *direct_method = 0u; 1292 } 1293 if (update_stats) { 1294 ProcessedInvoke(orig_invoke_type, stats_flags); 1295 } 1296 return result; 1297} 1298 1299const VerifiedMethod* CompilerDriver::GetVerifiedMethod(const DexFile* dex_file, 1300 uint32_t method_idx) const { 1301 MethodReference ref(dex_file, method_idx); 1302 return verification_results_->GetVerifiedMethod(ref); 1303} 1304 1305bool CompilerDriver::IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc) { 1306 DCHECK(mUnit->GetVerifiedMethod() != nullptr); 1307 bool result = mUnit->GetVerifiedMethod()->IsSafeCast(dex_pc); 1308 if (result) { 1309 stats_->SafeCast(); 1310 } else { 1311 stats_->NotASafeCast(); 1312 } 1313 return result; 1314} 1315 1316void CompilerDriver::AddCodePatch(const DexFile* dex_file, 1317 uint16_t referrer_class_def_idx, 1318 uint32_t referrer_method_idx, 1319 InvokeType referrer_invoke_type, 1320 uint32_t target_method_idx, 1321 const DexFile* target_dex_file, 1322 InvokeType target_invoke_type, 1323 size_t literal_offset) { 1324 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1325 code_to_patch_.push_back(new CallPatchInformation(dex_file, 1326 referrer_class_def_idx, 1327 referrer_method_idx, 1328 referrer_invoke_type, 1329 target_method_idx, 1330 target_dex_file, 1331 target_invoke_type, 1332 literal_offset)); 1333} 1334void CompilerDriver::AddRelativeCodePatch(const DexFile* dex_file, 1335 uint16_t referrer_class_def_idx, 1336 uint32_t referrer_method_idx, 1337 InvokeType referrer_invoke_type, 1338 uint32_t target_method_idx, 1339 const DexFile* target_dex_file, 1340 InvokeType target_invoke_type, 1341 size_t literal_offset, 1342 int32_t pc_relative_offset) { 1343 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1344 code_to_patch_.push_back(new RelativeCallPatchInformation(dex_file, 1345 referrer_class_def_idx, 1346 referrer_method_idx, 1347 referrer_invoke_type, 1348 target_method_idx, 1349 target_dex_file, 1350 target_invoke_type, 1351 literal_offset, 1352 pc_relative_offset)); 1353} 1354void CompilerDriver::AddMethodPatch(const DexFile* dex_file, 1355 uint16_t referrer_class_def_idx, 1356 uint32_t referrer_method_idx, 1357 InvokeType referrer_invoke_type, 1358 uint32_t target_method_idx, 1359 const DexFile* target_dex_file, 1360 InvokeType target_invoke_type, 1361 size_t literal_offset) { 1362 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1363 methods_to_patch_.push_back(new CallPatchInformation(dex_file, 1364 referrer_class_def_idx, 1365 referrer_method_idx, 1366 referrer_invoke_type, 1367 target_method_idx, 1368 target_dex_file, 1369 target_invoke_type, 1370 literal_offset)); 1371} 1372void CompilerDriver::AddClassPatch(const DexFile* dex_file, 1373 uint16_t referrer_class_def_idx, 1374 uint32_t referrer_method_idx, 1375 uint32_t target_type_idx, 1376 const DexFile* target_type_dex_file, 1377 size_t literal_offset) { 1378 MutexLock mu(Thread::Current(), compiled_methods_lock_); 1379 classes_to_patch_.push_back(new TypePatchInformation(dex_file, 1380 referrer_class_def_idx, 1381 referrer_method_idx, 1382 target_type_idx, 1383 target_type_dex_file, 1384 literal_offset)); 1385} 1386 1387class ParallelCompilationManager { 1388 public: 1389 typedef void Callback(const ParallelCompilationManager* manager, size_t index); 1390 1391 ParallelCompilationManager(ClassLinker* class_linker, 1392 jobject class_loader, 1393 CompilerDriver* compiler, 1394 const DexFile* dex_file, 1395 const std::vector<const DexFile*>& dex_files, 1396 ThreadPool* thread_pool) 1397 : index_(0), 1398 class_linker_(class_linker), 1399 class_loader_(class_loader), 1400 compiler_(compiler), 1401 dex_file_(dex_file), 1402 dex_files_(dex_files), 1403 thread_pool_(thread_pool) {} 1404 1405 ClassLinker* GetClassLinker() const { 1406 CHECK(class_linker_ != NULL); 1407 return class_linker_; 1408 } 1409 1410 jobject GetClassLoader() const { 1411 return class_loader_; 1412 } 1413 1414 CompilerDriver* GetCompiler() const { 1415 CHECK(compiler_ != NULL); 1416 return compiler_; 1417 } 1418 1419 const DexFile* GetDexFile() const { 1420 CHECK(dex_file_ != NULL); 1421 return dex_file_; 1422 } 1423 1424 const std::vector<const DexFile*>& GetDexFiles() const { 1425 return dex_files_; 1426 } 1427 1428 void ForAll(size_t begin, size_t end, Callback callback, size_t work_units) { 1429 Thread* self = Thread::Current(); 1430 self->AssertNoPendingException(); 1431 CHECK_GT(work_units, 0U); 1432 1433 index_.StoreRelaxed(begin); 1434 for (size_t i = 0; i < work_units; ++i) { 1435 thread_pool_->AddTask(self, new ForAllClosure(this, end, callback)); 1436 } 1437 thread_pool_->StartWorkers(self); 1438 1439 // Ensure we're suspended while we're blocked waiting for the other threads to finish (worker 1440 // thread destructor's called below perform join). 1441 CHECK_NE(self->GetState(), kRunnable); 1442 1443 // Wait for all the worker threads to finish. 1444 thread_pool_->Wait(self, true, false); 1445 } 1446 1447 size_t NextIndex() { 1448 return index_.FetchAndAddSequentiallyConsistent(1); 1449 } 1450 1451 private: 1452 class ForAllClosure : public Task { 1453 public: 1454 ForAllClosure(ParallelCompilationManager* manager, size_t end, Callback* callback) 1455 : manager_(manager), 1456 end_(end), 1457 callback_(callback) {} 1458 1459 virtual void Run(Thread* self) { 1460 while (true) { 1461 const size_t index = manager_->NextIndex(); 1462 if (UNLIKELY(index >= end_)) { 1463 break; 1464 } 1465 callback_(manager_, index); 1466 self->AssertNoPendingException(); 1467 } 1468 } 1469 1470 virtual void Finalize() { 1471 delete this; 1472 } 1473 1474 private: 1475 ParallelCompilationManager* const manager_; 1476 const size_t end_; 1477 Callback* const callback_; 1478 }; 1479 1480 AtomicInteger index_; 1481 ClassLinker* const class_linker_; 1482 const jobject class_loader_; 1483 CompilerDriver* const compiler_; 1484 const DexFile* const dex_file_; 1485 const std::vector<const DexFile*>& dex_files_; 1486 ThreadPool* const thread_pool_; 1487 1488 DISALLOW_COPY_AND_ASSIGN(ParallelCompilationManager); 1489}; 1490 1491static bool SkipClassCheckClassPath(const char* descriptor, const DexFile& dex_file, 1492 const std::vector<const DexFile*>& classpath) { 1493 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, classpath); 1494 CHECK(pair.second != NULL); 1495 if (pair.first != &dex_file) { 1496 LOG(WARNING) << "Skipping class " << descriptor << " from " << dex_file.GetLocation() 1497 << " previously found in " << pair.first->GetLocation(); 1498 return true; 1499 } 1500 return false; 1501} 1502 1503// Return true if the class should be skipped during compilation. 1504// 1505// The first case where we skip is for redundant class definitions in 1506// the boot classpath. We skip all but the first definition in that case. 1507// 1508// The second case where we skip is when an app bundles classes found 1509// in the boot classpath. Since at runtime we will select the class from 1510// the boot classpath, we ignore the one from the app. 1511// 1512// The third case is if the app itself has the class defined in multiple dex files. Then we skip 1513// it if it is not the first occurrence. 1514static bool SkipClass(ClassLinker* class_linker, jobject class_loader, const DexFile& dex_file, 1515 const std::vector<const DexFile*>& dex_files, 1516 const DexFile::ClassDef& class_def) { 1517 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1518 1519 if (class_loader == NULL) { 1520 return SkipClassCheckClassPath(descriptor, dex_file, class_linker->GetBootClassPath()); 1521 } 1522 1523 if (class_linker->IsInBootClassPath(descriptor)) { 1524 return true; 1525 } 1526 1527 return SkipClassCheckClassPath(descriptor, dex_file, dex_files); 1528} 1529 1530// A fast version of SkipClass above if the class pointer is available 1531// that avoids the expensive FindInClassPath search. 1532static bool SkipClass(jobject class_loader, const DexFile& dex_file, mirror::Class* klass) 1533 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1534 DCHECK(klass != NULL); 1535 const DexFile& original_dex_file = *klass->GetDexCache()->GetDexFile(); 1536 if (&dex_file != &original_dex_file) { 1537 if (class_loader == NULL) { 1538 LOG(WARNING) << "Skipping class " << PrettyDescriptor(klass) << " from " 1539 << dex_file.GetLocation() << " previously found in " 1540 << original_dex_file.GetLocation(); 1541 } 1542 return true; 1543 } 1544 return false; 1545} 1546 1547static void CheckAndClearResolveException(Thread* self) 1548 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1549 CHECK(self->IsExceptionPending()); 1550 mirror::Throwable* exception = self->GetException(nullptr); 1551 std::string temp; 1552 const char* descriptor = exception->GetClass()->GetDescriptor(&temp); 1553 const char* expected_exceptions[] = { 1554 "Ljava/lang/IllegalAccessError;", 1555 "Ljava/lang/IncompatibleClassChangeError;", 1556 "Ljava/lang/InstantiationError;", 1557 "Ljava/lang/NoClassDefFoundError;", 1558 "Ljava/lang/NoSuchFieldError;", 1559 "Ljava/lang/NoSuchMethodError;" 1560 }; 1561 bool found = false; 1562 for (size_t i = 0; (found == false) && (i < arraysize(expected_exceptions)); ++i) { 1563 if (strcmp(descriptor, expected_exceptions[i]) == 0) { 1564 found = true; 1565 } 1566 } 1567 if (!found) { 1568 LOG(FATAL) << "Unexpected exeption " << exception->Dump(); 1569 } 1570 self->ClearException(); 1571} 1572 1573static void ResolveClassFieldsAndMethods(const ParallelCompilationManager* manager, 1574 size_t class_def_index) 1575 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1576 ATRACE_CALL(); 1577 Thread* self = Thread::Current(); 1578 jobject jclass_loader = manager->GetClassLoader(); 1579 const DexFile& dex_file = *manager->GetDexFile(); 1580 ClassLinker* class_linker = manager->GetClassLinker(); 1581 1582 // If an instance field is final then we need to have a barrier on the return, static final 1583 // fields are assigned within the lock held for class initialization. Conservatively assume 1584 // constructor barriers are always required. 1585 bool requires_constructor_barrier = true; 1586 1587 // Method and Field are the worst. We can't resolve without either 1588 // context from the code use (to disambiguate virtual vs direct 1589 // method and instance vs static field) or from class 1590 // definitions. While the compiler will resolve what it can as it 1591 // needs it, here we try to resolve fields and methods used in class 1592 // definitions, since many of them many never be referenced by 1593 // generated code. 1594 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1595 if (!SkipClass(class_linker, jclass_loader, dex_file, manager->GetDexFiles(), class_def)) { 1596 ScopedObjectAccess soa(self); 1597 StackHandleScope<2> hs(soa.Self()); 1598 Handle<mirror::ClassLoader> class_loader( 1599 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1600 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1601 // Resolve the class. 1602 mirror::Class* klass = class_linker->ResolveType(dex_file, class_def.class_idx_, dex_cache, 1603 class_loader); 1604 bool resolve_fields_and_methods; 1605 if (klass == NULL) { 1606 // Class couldn't be resolved, for example, super-class is in a different dex file. Don't 1607 // attempt to resolve methods and fields when there is no declaring class. 1608 CheckAndClearResolveException(soa.Self()); 1609 resolve_fields_and_methods = false; 1610 } else { 1611 resolve_fields_and_methods = manager->GetCompiler()->IsImage(); 1612 } 1613 // Note the class_data pointer advances through the headers, 1614 // static fields, instance fields, direct methods, and virtual 1615 // methods. 1616 const byte* class_data = dex_file.GetClassData(class_def); 1617 if (class_data == NULL) { 1618 // Empty class such as a marker interface. 1619 requires_constructor_barrier = false; 1620 } else { 1621 ClassDataItemIterator it(dex_file, class_data); 1622 while (it.HasNextStaticField()) { 1623 if (resolve_fields_and_methods) { 1624 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1625 dex_cache, class_loader, true); 1626 if (field == NULL) { 1627 CheckAndClearResolveException(soa.Self()); 1628 } 1629 } 1630 it.Next(); 1631 } 1632 // We require a constructor barrier if there are final instance fields. 1633 requires_constructor_barrier = false; 1634 while (it.HasNextInstanceField()) { 1635 if ((it.GetMemberAccessFlags() & kAccFinal) != 0) { 1636 requires_constructor_barrier = true; 1637 } 1638 if (resolve_fields_and_methods) { 1639 mirror::ArtField* field = class_linker->ResolveField(dex_file, it.GetMemberIndex(), 1640 dex_cache, class_loader, false); 1641 if (field == NULL) { 1642 CheckAndClearResolveException(soa.Self()); 1643 } 1644 } 1645 it.Next(); 1646 } 1647 if (resolve_fields_and_methods) { 1648 while (it.HasNextDirectMethod()) { 1649 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1650 dex_cache, class_loader, 1651 NullHandle<mirror::ArtMethod>(), 1652 it.GetMethodInvokeType(class_def)); 1653 if (method == NULL) { 1654 CheckAndClearResolveException(soa.Self()); 1655 } 1656 it.Next(); 1657 } 1658 while (it.HasNextVirtualMethod()) { 1659 mirror::ArtMethod* method = class_linker->ResolveMethod(dex_file, it.GetMemberIndex(), 1660 dex_cache, class_loader, 1661 NullHandle<mirror::ArtMethod>(), 1662 it.GetMethodInvokeType(class_def)); 1663 if (method == NULL) { 1664 CheckAndClearResolveException(soa.Self()); 1665 } 1666 it.Next(); 1667 } 1668 DCHECK(!it.HasNext()); 1669 } 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 == NULL) { 1690 CHECK(soa.Self()->IsExceptionPending()); 1691 mirror::Throwable* exception = soa.Self()->GetException(NULL); 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::Verify(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 != NULL); 1727 VerifyDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1728 } 1729} 1730 1731static void VerifyClass(const ParallelCompilationManager* manager, size_t class_def_index) 1732 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1733 ATRACE_CALL(); 1734 ScopedObjectAccess soa(Thread::Current()); 1735 const DexFile& dex_file = *manager->GetDexFile(); 1736 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1737 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1738 ClassLinker* class_linker = manager->GetClassLinker(); 1739 jobject jclass_loader = manager->GetClassLoader(); 1740 StackHandleScope<3> hs(soa.Self()); 1741 Handle<mirror::ClassLoader> class_loader( 1742 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1743 Handle<mirror::Class> klass( 1744 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1745 if (klass.Get() == nullptr) { 1746 CHECK(soa.Self()->IsExceptionPending()); 1747 soa.Self()->ClearException(); 1748 1749 /* 1750 * At compile time, we can still structurally verify the class even if FindClass fails. 1751 * This is to ensure the class is structurally sound for compilation. An unsound class 1752 * will be rejected by the verifier and later skipped during compilation in the compiler. 1753 */ 1754 Handle<mirror::DexCache> dex_cache(hs.NewHandle(class_linker->FindDexCache(dex_file))); 1755 std::string error_msg; 1756 if (verifier::MethodVerifier::VerifyClass(&dex_file, dex_cache, class_loader, &class_def, true, 1757 &error_msg) == 1758 verifier::MethodVerifier::kHardFailure) { 1759 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(descriptor) 1760 << " because: " << error_msg; 1761 } 1762 } else if (!SkipClass(jclass_loader, dex_file, klass.Get())) { 1763 CHECK(klass->IsResolved()) << PrettyClass(klass.Get()); 1764 class_linker->VerifyClass(klass); 1765 1766 if (klass->IsErroneous()) { 1767 // ClassLinker::VerifyClass throws, which isn't useful in the compiler. 1768 CHECK(soa.Self()->IsExceptionPending()); 1769 soa.Self()->ClearException(); 1770 } 1771 1772 CHECK(klass->IsCompileTimeVerified() || klass->IsErroneous()) 1773 << PrettyDescriptor(klass.Get()) << ": state=" << klass->GetStatus(); 1774 } 1775 soa.Self()->AssertNoPendingException(); 1776} 1777 1778void CompilerDriver::VerifyDexFile(jobject class_loader, const DexFile& dex_file, 1779 const std::vector<const DexFile*>& dex_files, 1780 ThreadPool* thread_pool, TimingLogger* timings) { 1781 TimingLogger::ScopedTiming t("Verify Dex File", timings); 1782 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1783 ParallelCompilationManager context(class_linker, class_loader, this, &dex_file, dex_files, 1784 thread_pool); 1785 context.ForAll(0, dex_file.NumClassDefs(), VerifyClass, thread_count_); 1786} 1787 1788static void InitializeClass(const ParallelCompilationManager* manager, size_t class_def_index) 1789 LOCKS_EXCLUDED(Locks::mutator_lock_) { 1790 ATRACE_CALL(); 1791 jobject jclass_loader = manager->GetClassLoader(); 1792 const DexFile& dex_file = *manager->GetDexFile(); 1793 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1794 const DexFile::TypeId& class_type_id = dex_file.GetTypeId(class_def.class_idx_); 1795 const char* descriptor = dex_file.StringDataByIdx(class_type_id.descriptor_idx_); 1796 1797 ScopedObjectAccess soa(Thread::Current()); 1798 StackHandleScope<3> hs(soa.Self()); 1799 Handle<mirror::ClassLoader> class_loader( 1800 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1801 Handle<mirror::Class> klass( 1802 hs.NewHandle(manager->GetClassLinker()->FindClass(soa.Self(), descriptor, class_loader))); 1803 1804 if (klass.Get() != nullptr && !SkipClass(jclass_loader, dex_file, klass.Get())) { 1805 // Only try to initialize classes that were successfully verified. 1806 if (klass->IsVerified()) { 1807 // Attempt to initialize the class but bail if we either need to initialize the super-class 1808 // or static fields. 1809 manager->GetClassLinker()->EnsureInitialized(klass, false, false); 1810 if (!klass->IsInitialized()) { 1811 // We don't want non-trivial class initialization occurring on multiple threads due to 1812 // deadlock problems. For example, a parent class is initialized (holding its lock) that 1813 // refers to a sub-class in its static/class initializer causing it to try to acquire the 1814 // sub-class' lock. While on a second thread the sub-class is initialized (holding its lock) 1815 // after first initializing its parents, whose locks are acquired. This leads to a 1816 // parent-to-child and a child-to-parent lock ordering and consequent potential deadlock. 1817 // We need to use an ObjectLock due to potential suspension in the interpreting code. Rather 1818 // than use a special Object for the purpose we use the Class of java.lang.Class. 1819 Handle<mirror::Class> h_klass(hs.NewHandle(klass->GetClass())); 1820 ObjectLock<mirror::Class> lock(soa.Self(), h_klass); 1821 // Attempt to initialize allowing initialization of parent classes but still not static 1822 // fields. 1823 manager->GetClassLinker()->EnsureInitialized(klass, false, true); 1824 if (!klass->IsInitialized()) { 1825 // We need to initialize static fields, we only do this for image classes that aren't 1826 // marked with the $NoPreloadHolder (which implies this should not be initialized early). 1827 bool can_init_static_fields = manager->GetCompiler()->IsImage() && 1828 manager->GetCompiler()->IsImageClass(descriptor) && 1829 !StringPiece(descriptor).ends_with("$NoPreloadHolder;"); 1830 if (can_init_static_fields) { 1831 VLOG(compiler) << "Initializing: " << descriptor; 1832 // TODO multithreading support. We should ensure the current compilation thread has 1833 // exclusive access to the runtime and the transaction. To achieve this, we could use 1834 // a ReaderWriterMutex but we're holding the mutator lock so we fail mutex sanity 1835 // checks in Thread::AssertThreadSuspensionIsAllowable. 1836 Runtime* const runtime = Runtime::Current(); 1837 Transaction transaction; 1838 1839 // Run the class initializer in transaction mode. 1840 runtime->EnterTransactionMode(&transaction); 1841 const mirror::Class::Status old_status = klass->GetStatus(); 1842 bool success = manager->GetClassLinker()->EnsureInitialized(klass, true, true); 1843 // TODO we detach transaction from runtime to indicate we quit the transactional 1844 // mode which prevents the GC from visiting objects modified during the transaction. 1845 // Ensure GC is not run so don't access freed objects when aborting transaction. 1846 const char* old_casue = soa.Self()->StartAssertNoThreadSuspension("Transaction end"); 1847 runtime->ExitTransactionMode(); 1848 1849 if (!success) { 1850 CHECK(soa.Self()->IsExceptionPending()); 1851 ThrowLocation throw_location; 1852 mirror::Throwable* exception = soa.Self()->GetException(&throw_location); 1853 VLOG(compiler) << "Initialization of " << descriptor << " aborted because of " 1854 << exception->Dump(); 1855 soa.Self()->ClearException(); 1856 transaction.Abort(); 1857 CHECK_EQ(old_status, klass->GetStatus()) << "Previous class status not restored"; 1858 } 1859 soa.Self()->EndAssertNoThreadSuspension(old_casue); 1860 } 1861 } 1862 soa.Self()->AssertNoPendingException(); 1863 } 1864 } 1865 // Record the final class status if necessary. 1866 ClassReference ref(manager->GetDexFile(), class_def_index); 1867 manager->GetCompiler()->RecordClassStatus(ref, klass->GetStatus()); 1868 } 1869 // Clear any class not found or verification exceptions. 1870 soa.Self()->ClearException(); 1871} 1872 1873void CompilerDriver::InitializeClasses(jobject jni_class_loader, const DexFile& dex_file, 1874 const std::vector<const DexFile*>& dex_files, 1875 ThreadPool* thread_pool, TimingLogger* timings) { 1876 TimingLogger::ScopedTiming t("InitializeNoClinit", timings); 1877 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 1878 ParallelCompilationManager context(class_linker, jni_class_loader, this, &dex_file, dex_files, 1879 thread_pool); 1880 size_t thread_count; 1881 if (IsImage()) { 1882 // TODO: remove this when transactional mode supports multithreading. 1883 thread_count = 1U; 1884 } else { 1885 thread_count = thread_count_; 1886 } 1887 context.ForAll(0, dex_file.NumClassDefs(), InitializeClass, thread_count); 1888 if (IsImage()) { 1889 // Prune garbage objects created during aborted transactions. 1890 Runtime::Current()->GetHeap()->CollectGarbage(true); 1891 } 1892} 1893 1894void CompilerDriver::InitializeClasses(jobject class_loader, 1895 const std::vector<const DexFile*>& dex_files, 1896 ThreadPool* thread_pool, TimingLogger* timings) { 1897 for (size_t i = 0; i != dex_files.size(); ++i) { 1898 const DexFile* dex_file = dex_files[i]; 1899 CHECK(dex_file != NULL); 1900 InitializeClasses(class_loader, *dex_file, dex_files, thread_pool, timings); 1901 } 1902} 1903 1904void CompilerDriver::Compile(jobject class_loader, const std::vector<const DexFile*>& dex_files, 1905 ThreadPool* thread_pool, TimingLogger* timings) { 1906 for (size_t i = 0; i != dex_files.size(); ++i) { 1907 const DexFile* dex_file = dex_files[i]; 1908 CHECK(dex_file != NULL); 1909 CompileDexFile(class_loader, *dex_file, dex_files, thread_pool, timings); 1910 } 1911} 1912 1913void CompilerDriver::CompileClass(const ParallelCompilationManager* manager, size_t class_def_index) { 1914 ATRACE_CALL(); 1915 const DexFile& dex_file = *manager->GetDexFile(); 1916 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); 1917 ClassLinker* class_linker = manager->GetClassLinker(); 1918 jobject jclass_loader = manager->GetClassLoader(); 1919 { 1920 // Use a scoped object access to perform to the quick SkipClass check. 1921 const char* descriptor = dex_file.GetClassDescriptor(class_def); 1922 ScopedObjectAccess soa(Thread::Current()); 1923 StackHandleScope<3> hs(soa.Self()); 1924 Handle<mirror::ClassLoader> class_loader( 1925 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1926 Handle<mirror::Class> klass( 1927 hs.NewHandle(class_linker->FindClass(soa.Self(), descriptor, class_loader))); 1928 if (klass.Get() == nullptr) { 1929 CHECK(soa.Self()->IsExceptionPending()); 1930 soa.Self()->ClearException(); 1931 } else if (SkipClass(jclass_loader, dex_file, klass.Get())) { 1932 return; 1933 } 1934 } 1935 ClassReference ref(&dex_file, class_def_index); 1936 // Skip compiling classes with generic verifier failures since they will still fail at runtime 1937 if (manager->GetCompiler()->verification_results_->IsClassRejected(ref)) { 1938 return; 1939 } 1940 const byte* class_data = dex_file.GetClassData(class_def); 1941 if (class_data == NULL) { 1942 // empty class, probably a marker interface 1943 return; 1944 } 1945 1946 // Can we run DEX-to-DEX compiler on this class ? 1947 DexToDexCompilationLevel dex_to_dex_compilation_level = kDontDexToDexCompile; 1948 { 1949 ScopedObjectAccess soa(Thread::Current()); 1950 StackHandleScope<1> hs(soa.Self()); 1951 Handle<mirror::ClassLoader> class_loader( 1952 hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader))); 1953 dex_to_dex_compilation_level = GetDexToDexCompilationlevel(soa.Self(), class_loader, dex_file, 1954 class_def); 1955 } 1956 ClassDataItemIterator it(dex_file, class_data); 1957 // Skip fields 1958 while (it.HasNextStaticField()) { 1959 it.Next(); 1960 } 1961 while (it.HasNextInstanceField()) { 1962 it.Next(); 1963 } 1964 CompilerDriver* driver = manager->GetCompiler(); 1965 // Compile direct methods 1966 int64_t previous_direct_method_idx = -1; 1967 while (it.HasNextDirectMethod()) { 1968 uint32_t method_idx = it.GetMemberIndex(); 1969 if (method_idx == previous_direct_method_idx) { 1970 // smali can create dex files with two encoded_methods sharing the same method_idx 1971 // http://code.google.com/p/smali/issues/detail?id=119 1972 it.Next(); 1973 continue; 1974 } 1975 previous_direct_method_idx = method_idx; 1976 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), 1977 it.GetMethodInvokeType(class_def), class_def_index, 1978 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level); 1979 it.Next(); 1980 } 1981 // Compile virtual methods 1982 int64_t previous_virtual_method_idx = -1; 1983 while (it.HasNextVirtualMethod()) { 1984 uint32_t method_idx = it.GetMemberIndex(); 1985 if (method_idx == previous_virtual_method_idx) { 1986 // smali can create dex files with two encoded_methods sharing the same method_idx 1987 // http://code.google.com/p/smali/issues/detail?id=119 1988 it.Next(); 1989 continue; 1990 } 1991 previous_virtual_method_idx = method_idx; 1992 driver->CompileMethod(it.GetMethodCodeItem(), it.GetMemberAccessFlags(), 1993 it.GetMethodInvokeType(class_def), class_def_index, 1994 method_idx, jclass_loader, dex_file, dex_to_dex_compilation_level); 1995 it.Next(); 1996 } 1997 DCHECK(!it.HasNext()); 1998} 1999 2000void CompilerDriver::CompileDexFile(jobject class_loader, const DexFile& dex_file, 2001 const std::vector<const DexFile*>& dex_files, 2002 ThreadPool* thread_pool, TimingLogger* timings) { 2003 TimingLogger::ScopedTiming t("Compile Dex File", timings); 2004 ParallelCompilationManager context(Runtime::Current()->GetClassLinker(), class_loader, this, 2005 &dex_file, dex_files, thread_pool); 2006 context.ForAll(0, dex_file.NumClassDefs(), CompilerDriver::CompileClass, thread_count_); 2007} 2008 2009void CompilerDriver::CompileMethod(const DexFile::CodeItem* code_item, uint32_t access_flags, 2010 InvokeType invoke_type, uint16_t class_def_idx, 2011 uint32_t method_idx, jobject class_loader, 2012 const DexFile& dex_file, 2013 DexToDexCompilationLevel dex_to_dex_compilation_level) { 2014 CompiledMethod* compiled_method = NULL; 2015 uint64_t start_ns = NanoTime(); 2016 2017 if ((access_flags & kAccNative) != 0) { 2018 // Are we interpreting only and have support for generic JNI down calls? 2019 if (!compiler_options_->IsCompilationEnabled() && 2020 (instruction_set_ == kX86_64 || instruction_set_ == kArm64)) { 2021 // Leaving this empty will trigger the generic JNI version 2022 } else { 2023 compiled_method = compiler_->JniCompile(access_flags, method_idx, dex_file); 2024 CHECK(compiled_method != NULL); 2025 } 2026 } else if ((access_flags & kAccAbstract) != 0) { 2027 } else { 2028 MethodReference method_ref(&dex_file, method_idx); 2029 bool compile = verification_results_->IsCandidateForCompilation(method_ref, access_flags); 2030 if (compile) { 2031 // NOTE: if compiler declines to compile this method, it will return NULL. 2032 compiled_method = compiler_->Compile(code_item, access_flags, invoke_type, class_def_idx, 2033 method_idx, class_loader, dex_file); 2034 } 2035 if (compiled_method == nullptr && dex_to_dex_compilation_level != kDontDexToDexCompile) { 2036 // TODO: add a command-line option to disable DEX-to-DEX compilation ? 2037 (*dex_to_dex_compiler_)(*this, code_item, access_flags, 2038 invoke_type, class_def_idx, 2039 method_idx, class_loader, dex_file, 2040 dex_to_dex_compilation_level); 2041 } 2042 } 2043 uint64_t duration_ns = NanoTime() - start_ns; 2044 if (duration_ns > MsToNs(compiler_->GetMaximumCompilationTimeBeforeWarning()) && !kIsDebugBuild) { 2045 LOG(WARNING) << "Compilation of " << PrettyMethod(method_idx, dex_file) 2046 << " took " << PrettyDuration(duration_ns); 2047 } 2048 2049 Thread* self = Thread::Current(); 2050 if (compiled_method != NULL) { 2051 MethodReference ref(&dex_file, method_idx); 2052 DCHECK(GetCompiledMethod(ref) == NULL) << PrettyMethod(method_idx, dex_file); 2053 { 2054 MutexLock mu(self, compiled_methods_lock_); 2055 compiled_methods_.Put(ref, compiled_method); 2056 } 2057 DCHECK(GetCompiledMethod(ref) != NULL) << PrettyMethod(method_idx, dex_file); 2058 } 2059 2060 if (self->IsExceptionPending()) { 2061 ScopedObjectAccess soa(self); 2062 LOG(FATAL) << "Unexpected exception compiling: " << PrettyMethod(method_idx, dex_file) << "\n" 2063 << self->GetException(NULL)->Dump(); 2064 } 2065} 2066 2067CompiledClass* CompilerDriver::GetCompiledClass(ClassReference ref) const { 2068 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2069 ClassTable::const_iterator it = compiled_classes_.find(ref); 2070 if (it == compiled_classes_.end()) { 2071 return NULL; 2072 } 2073 CHECK(it->second != NULL); 2074 return it->second; 2075} 2076 2077void CompilerDriver::RecordClassStatus(ClassReference ref, mirror::Class::Status status) { 2078 MutexLock mu(Thread::Current(), compiled_classes_lock_); 2079 auto it = compiled_classes_.find(ref); 2080 if (it == compiled_classes_.end() || it->second->GetStatus() != status) { 2081 // An entry doesn't exist or the status is lower than the new status. 2082 if (it != compiled_classes_.end()) { 2083 CHECK_GT(status, it->second->GetStatus()); 2084 delete it->second; 2085 } 2086 switch (status) { 2087 case mirror::Class::kStatusNotReady: 2088 case mirror::Class::kStatusError: 2089 case mirror::Class::kStatusRetryVerificationAtRuntime: 2090 case mirror::Class::kStatusVerified: 2091 case mirror::Class::kStatusInitialized: 2092 break; // Expected states. 2093 default: 2094 LOG(FATAL) << "Unexpected class status for class " 2095 << PrettyDescriptor(ref.first->GetClassDescriptor(ref.first->GetClassDef(ref.second))) 2096 << " of " << status; 2097 } 2098 CompiledClass* compiled_class = new CompiledClass(status); 2099 compiled_classes_.Overwrite(ref, compiled_class); 2100 } 2101} 2102 2103CompiledMethod* CompilerDriver::GetCompiledMethod(MethodReference ref) const { 2104 MutexLock mu(Thread::Current(), compiled_methods_lock_); 2105 MethodTable::const_iterator it = compiled_methods_.find(ref); 2106 if (it == compiled_methods_.end()) { 2107 return NULL; 2108 } 2109 CHECK(it->second != NULL); 2110 return it->second; 2111} 2112 2113void CompilerDriver::AddRequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2114 uint16_t class_def_index) { 2115 WriterMutexLock mu(self, freezing_constructor_lock_); 2116 freezing_constructor_classes_.insert(ClassReference(dex_file, class_def_index)); 2117} 2118 2119bool CompilerDriver::RequiresConstructorBarrier(Thread* self, const DexFile* dex_file, 2120 uint16_t class_def_index) { 2121 ReaderMutexLock mu(self, freezing_constructor_lock_); 2122 return freezing_constructor_classes_.count(ClassReference(dex_file, class_def_index)) != 0; 2123} 2124 2125bool CompilerDriver::WriteElf(const std::string& android_root, 2126 bool is_host, 2127 const std::vector<const art::DexFile*>& dex_files, 2128 OatWriter* oat_writer, 2129 art::File* file) 2130 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 2131 return compiler_->WriteElf(file, oat_writer, dex_files, android_root, is_host); 2132} 2133void CompilerDriver::InstructionSetToLLVMTarget(InstructionSet instruction_set, 2134 std::string* target_triple, 2135 std::string* target_cpu, 2136 std::string* target_attr) { 2137 switch (instruction_set) { 2138 case kThumb2: 2139 *target_triple = "thumb-none-linux-gnueabi"; 2140 *target_cpu = "cortex-a9"; 2141 *target_attr = "+thumb2,+neon,+neonfp,+vfp3,+db"; 2142 break; 2143 2144 case kArm: 2145 *target_triple = "armv7-none-linux-gnueabi"; 2146 // TODO: Fix for Nexus S. 2147 *target_cpu = "cortex-a9"; 2148 // TODO: Fix for Xoom. 2149 *target_attr = "+v7,+neon,+neonfp,+vfp3,+db"; 2150 break; 2151 2152 case kX86: 2153 *target_triple = "i386-pc-linux-gnu"; 2154 *target_attr = ""; 2155 break; 2156 2157 case kX86_64: 2158 *target_triple = "x86_64-pc-linux-gnu"; 2159 *target_attr = ""; 2160 break; 2161 2162 case kMips: 2163 *target_triple = "mipsel-unknown-linux"; 2164 *target_attr = "mips32r2"; 2165 break; 2166 2167 default: 2168 LOG(FATAL) << "Unknown instruction set: " << instruction_set; 2169 } 2170 } 2171 2172bool CompilerDriver::SkipCompilation(const std::string& method_name) { 2173 if (!profile_present_) { 2174 return false; 2175 } 2176 // First find the method in the profile file. 2177 ProfileFile::ProfileData data; 2178 if (!profile_file_.GetProfileData(&data, method_name)) { 2179 // Not in profile, no information can be determined. 2180 if (kIsDebugBuild) { 2181 VLOG(compiler) << "not compiling " << method_name << " because it's not in the profile"; 2182 } 2183 return true; 2184 } 2185 2186 // Methods that comprise top_k_threshold % of the total samples will be compiled. 2187 // Compare against the start of the topK percentage bucket just in case the threshold 2188 // falls inside a bucket. 2189 bool compile = data.GetTopKUsedPercentage() - data.GetUsedPercent() 2190 <= compiler_options_->GetTopKProfileThreshold(); 2191 if (kIsDebugBuild) { 2192 if (compile) { 2193 LOG(INFO) << "compiling method " << method_name << " because its usage is part of top " 2194 << data.GetTopKUsedPercentage() << "% with a percent of " << data.GetUsedPercent() << "%" 2195 << " (topKThreshold=" << compiler_options_->GetTopKProfileThreshold() << ")"; 2196 } else { 2197 VLOG(compiler) << "not compiling method " << method_name 2198 << " because it's not part of leading " << compiler_options_->GetTopKProfileThreshold() 2199 << "% samples)"; 2200 } 2201 } 2202 return !compile; 2203} 2204} // namespace art 2205