runtime.h revision ee7d2fd16d47b54d7fb5b9d5ec772fbc315faf4b
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#ifndef ART_RUNTIME_RUNTIME_H_ 18#define ART_RUNTIME_RUNTIME_H_ 19 20#include <jni.h> 21#include <stdio.h> 22 23#include <iosfwd> 24#include <set> 25#include <string> 26#include <utility> 27#include <memory> 28#include <vector> 29 30#include "arch/instruction_set.h" 31#include "base/macros.h" 32#include "base/mutex.h" 33#include "deoptimization_kind.h" 34#include "dex/dex_file_types.h" 35#include "experimental_flags.h" 36#include "gc_root.h" 37#include "instrumentation.h" 38#include "jdwp_provider.h" 39#include "obj_ptr.h" 40#include "offsets.h" 41#include "process_state.h" 42#include "quick/quick_method_frame_info.h" 43#include "runtime_stats.h" 44 45namespace art { 46 47namespace gc { 48class AbstractSystemWeakHolder; 49class Heap; 50} // namespace gc 51 52namespace jit { 53class Jit; 54class JitOptions; 55} // namespace jit 56 57namespace mirror { 58class Array; 59class ClassLoader; 60class DexCache; 61template<class T> class ObjectArray; 62template<class T> class PrimitiveArray; 63typedef PrimitiveArray<int8_t> ByteArray; 64class String; 65class Throwable; 66} // namespace mirror 67namespace ti { 68class Agent; 69class AgentSpec; 70} // namespace ti 71namespace verifier { 72class MethodVerifier; 73enum class VerifyMode : int8_t; 74} // namespace verifier 75class ArenaPool; 76class ArtMethod; 77enum class CalleeSaveType: uint32_t; 78class ClassLinker; 79class CompilerCallbacks; 80class DexFile; 81class InternTable; 82class IsMarkedVisitor; 83class JavaVMExt; 84class LinearAlloc; 85class MemMap; 86class MonitorList; 87class MonitorPool; 88class NullPointerHandler; 89class OatFileManager; 90class Plugin; 91struct RuntimeArgumentMap; 92class RuntimeCallbacks; 93class SignalCatcher; 94class StackOverflowHandler; 95class SuspensionHandler; 96class ThreadList; 97class Trace; 98struct TraceConfig; 99class Transaction; 100 101typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 102 103class Runtime { 104 public: 105 // Parse raw runtime options. 106 static bool ParseOptions(const RuntimeOptions& raw_options, 107 bool ignore_unrecognized, 108 RuntimeArgumentMap* runtime_options); 109 110 // Creates and initializes a new runtime. 111 static bool Create(RuntimeArgumentMap&& runtime_options) 112 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 113 114 // Creates and initializes a new runtime. 115 static bool Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) 116 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 117 118 // IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently. 119 bool IsAotCompiler() const { 120 return !UseJitCompilation() && IsCompiler(); 121 } 122 123 // IsCompiler is any runtime which has a running compiler, either dex2oat or JIT. 124 bool IsCompiler() const { 125 return compiler_callbacks_ != nullptr; 126 } 127 128 // If a compiler, are we compiling a boot image? 129 bool IsCompilingBootImage() const; 130 131 bool CanRelocate() const; 132 133 bool ShouldRelocate() const { 134 return must_relocate_ && CanRelocate(); 135 } 136 137 bool MustRelocateIfPossible() const { 138 return must_relocate_; 139 } 140 141 bool IsDex2OatEnabled() const { 142 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 143 } 144 145 bool IsImageDex2OatEnabled() const { 146 return image_dex2oat_enabled_; 147 } 148 149 CompilerCallbacks* GetCompilerCallbacks() { 150 return compiler_callbacks_; 151 } 152 153 void SetCompilerCallbacks(CompilerCallbacks* callbacks) { 154 CHECK(callbacks != nullptr); 155 compiler_callbacks_ = callbacks; 156 } 157 158 bool IsZygote() const { 159 return is_zygote_; 160 } 161 162 bool IsExplicitGcDisabled() const { 163 return is_explicit_gc_disabled_; 164 } 165 166 std::string GetCompilerExecutable() const; 167 std::string GetPatchoatExecutable() const; 168 169 const std::vector<std::string>& GetCompilerOptions() const { 170 return compiler_options_; 171 } 172 173 void AddCompilerOption(const std::string& option) { 174 compiler_options_.push_back(option); 175 } 176 177 const std::vector<std::string>& GetImageCompilerOptions() const { 178 return image_compiler_options_; 179 } 180 181 const std::string& GetImageLocation() const { 182 return image_location_; 183 } 184 185 // Starts a runtime, which may cause threads to be started and code to run. 186 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 187 188 bool IsShuttingDown(Thread* self); 189 bool IsShuttingDownLocked() const REQUIRES(Locks::runtime_shutdown_lock_) { 190 return shutting_down_; 191 } 192 193 size_t NumberOfThreadsBeingBorn() const REQUIRES(Locks::runtime_shutdown_lock_) { 194 return threads_being_born_; 195 } 196 197 void StartThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 198 threads_being_born_++; 199 } 200 201 void EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_); 202 203 bool IsStarted() const { 204 return started_; 205 } 206 207 bool IsFinishedStarting() const { 208 return finished_starting_; 209 } 210 211 static Runtime* Current() { 212 return instance_; 213 } 214 215 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 216 // callers should prefer. 217 NO_RETURN static void Abort(const char* msg) REQUIRES(!Locks::abort_lock_); 218 219 // Returns the "main" ThreadGroup, used when attaching user threads. 220 jobject GetMainThreadGroup() const; 221 222 // Returns the "system" ThreadGroup, used when attaching our internal threads. 223 jobject GetSystemThreadGroup() const; 224 225 // Returns the system ClassLoader which represents the CLASSPATH. 226 jobject GetSystemClassLoader() const; 227 228 // Attaches the calling native thread to the runtime. 229 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 230 bool create_peer); 231 232 void CallExitHook(jint status); 233 234 // Detaches the current native thread from the runtime. 235 void DetachCurrentThread() REQUIRES(!Locks::mutator_lock_); 236 237 void DumpDeoptimizations(std::ostream& os); 238 void DumpForSigQuit(std::ostream& os); 239 void DumpLockHolders(std::ostream& os); 240 241 ~Runtime(); 242 243 const std::string& GetBootClassPathString() const { 244 return boot_class_path_string_; 245 } 246 247 const std::string& GetClassPathString() const { 248 return class_path_string_; 249 } 250 251 ClassLinker* GetClassLinker() const { 252 return class_linker_; 253 } 254 255 size_t GetDefaultStackSize() const { 256 return default_stack_size_; 257 } 258 259 gc::Heap* GetHeap() const { 260 return heap_; 261 } 262 263 InternTable* GetInternTable() const { 264 DCHECK(intern_table_ != nullptr); 265 return intern_table_; 266 } 267 268 JavaVMExt* GetJavaVM() const { 269 return java_vm_.get(); 270 } 271 272 size_t GetMaxSpinsBeforeThinLockInflation() const { 273 return max_spins_before_thin_lock_inflation_; 274 } 275 276 MonitorList* GetMonitorList() const { 277 return monitor_list_; 278 } 279 280 MonitorPool* GetMonitorPool() const { 281 return monitor_pool_; 282 } 283 284 // Is the given object the special object used to mark a cleared JNI weak global? 285 bool IsClearedJniWeakGlobal(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 286 287 // Get the special object used to mark a cleared JNI weak global. 288 mirror::Object* GetClearedJniWeakGlobal() REQUIRES_SHARED(Locks::mutator_lock_); 289 290 mirror::Throwable* GetPreAllocatedOutOfMemoryError() REQUIRES_SHARED(Locks::mutator_lock_); 291 292 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 293 REQUIRES_SHARED(Locks::mutator_lock_); 294 295 const std::vector<std::string>& GetProperties() const { 296 return properties_; 297 } 298 299 ThreadList* GetThreadList() const { 300 return thread_list_; 301 } 302 303 static const char* GetVersion() { 304 return "2.1.0"; 305 } 306 307 bool IsMethodHandlesEnabled() const { 308 return true; 309 } 310 311 void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 312 void AllowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 313 // broadcast_for_checkpoint is true when we broadcast for making blocking threads to respond to 314 // checkpoint requests. It's false when we broadcast to unblock blocking threads after system weak 315 // access is reenabled. 316 void BroadcastForNewSystemWeaks(bool broadcast_for_checkpoint = false); 317 318 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 319 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 320 void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots) 321 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 322 REQUIRES_SHARED(Locks::mutator_lock_); 323 324 // Visit image roots, only used for hprof since the GC uses the image space mod union table 325 // instead. 326 void VisitImageRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 327 328 // Visit all of the roots we can do safely do concurrently. 329 void VisitConcurrentRoots(RootVisitor* visitor, 330 VisitRootFlags flags = kVisitRootFlagAllRoots) 331 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 332 REQUIRES_SHARED(Locks::mutator_lock_); 333 334 // Visit all of the non thread roots, we can do this with mutators unpaused. 335 void VisitNonThreadRoots(RootVisitor* visitor) 336 REQUIRES_SHARED(Locks::mutator_lock_); 337 338 void VisitTransactionRoots(RootVisitor* visitor) 339 REQUIRES_SHARED(Locks::mutator_lock_); 340 341 // Sweep system weaks, the system weak is deleted if the visitor return null. Otherwise, the 342 // system weak is updated to be the visitor's returned value. 343 void SweepSystemWeaks(IsMarkedVisitor* visitor) 344 REQUIRES_SHARED(Locks::mutator_lock_); 345 346 // Returns a special method that calls into a trampoline for runtime method resolution 347 ArtMethod* GetResolutionMethod(); 348 349 bool HasResolutionMethod() const { 350 return resolution_method_ != nullptr; 351 } 352 353 void SetResolutionMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 354 void ClearResolutionMethod() { 355 resolution_method_ = nullptr; 356 } 357 358 ArtMethod* CreateResolutionMethod() REQUIRES_SHARED(Locks::mutator_lock_); 359 360 // Returns a special method that calls into a trampoline for runtime imt conflicts. 361 ArtMethod* GetImtConflictMethod(); 362 ArtMethod* GetImtUnimplementedMethod(); 363 364 bool HasImtConflictMethod() const { 365 return imt_conflict_method_ != nullptr; 366 } 367 368 void ClearImtConflictMethod() { 369 imt_conflict_method_ = nullptr; 370 } 371 372 void FixupConflictTables(); 373 void SetImtConflictMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 374 void SetImtUnimplementedMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 375 376 ArtMethod* CreateImtConflictMethod(LinearAlloc* linear_alloc) 377 REQUIRES_SHARED(Locks::mutator_lock_); 378 379 void ClearImtUnimplementedMethod() { 380 imt_unimplemented_method_ = nullptr; 381 } 382 383 bool HasCalleeSaveMethod(CalleeSaveType type) const { 384 return callee_save_methods_[static_cast<size_t>(type)] != 0u; 385 } 386 387 ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 388 REQUIRES_SHARED(Locks::mutator_lock_); 389 390 ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 391 REQUIRES_SHARED(Locks::mutator_lock_); 392 393 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 394 return callee_save_method_frame_infos_[static_cast<size_t>(type)]; 395 } 396 397 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method) 398 REQUIRES_SHARED(Locks::mutator_lock_); 399 400 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 401 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[static_cast<size_t>(type)]); 402 } 403 404 InstructionSet GetInstructionSet() const { 405 return instruction_set_; 406 } 407 408 void SetInstructionSet(InstructionSet instruction_set); 409 void ClearInstructionSet(); 410 411 void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type); 412 void ClearCalleeSaveMethods(); 413 414 ArtMethod* CreateCalleeSaveMethod() REQUIRES_SHARED(Locks::mutator_lock_); 415 416 int32_t GetStat(int kind); 417 418 RuntimeStats* GetStats() { 419 return &stats_; 420 } 421 422 bool HasStatsEnabled() const { 423 return stats_enabled_; 424 } 425 426 void ResetStats(int kinds); 427 428 void SetStatsEnabled(bool new_state) 429 REQUIRES(!Locks::instrument_entrypoints_lock_, !Locks::mutator_lock_); 430 431 enum class NativeBridgeAction { // private 432 kUnload, 433 kInitialize 434 }; 435 436 jit::Jit* GetJit() const { 437 return jit_.get(); 438 } 439 440 // Returns true if JIT compilations are enabled. GetJit() will be not null in this case. 441 bool UseJitCompilation() const; 442 443 void PreZygoteFork(); 444 void InitNonZygoteOrPostFork( 445 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa); 446 447 const instrumentation::Instrumentation* GetInstrumentation() const { 448 return &instrumentation_; 449 } 450 451 instrumentation::Instrumentation* GetInstrumentation() { 452 return &instrumentation_; 453 } 454 455 void RegisterAppInfo(const std::vector<std::string>& code_paths, 456 const std::string& profile_output_filename); 457 458 // Transaction support. 459 bool IsActiveTransaction() const; 460 void EnterTransactionMode(); 461 void EnterTransactionMode(bool strict, mirror::Class* root); 462 void ExitTransactionMode(); 463 void RollbackAllTransactions() REQUIRES_SHARED(Locks::mutator_lock_); 464 // Transaction rollback and exit transaction are always done together, it's convenience to 465 // do them in one function. 466 void RollbackAndExitTransactionMode() REQUIRES_SHARED(Locks::mutator_lock_); 467 bool IsTransactionAborted() const; 468 const std::unique_ptr<Transaction>& GetTransaction() const; 469 bool IsActiveStrictTransactionMode() const; 470 471 void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) 472 REQUIRES_SHARED(Locks::mutator_lock_); 473 void ThrowTransactionAbortError(Thread* self) 474 REQUIRES_SHARED(Locks::mutator_lock_); 475 476 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 477 bool is_volatile) const; 478 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 479 bool is_volatile) const; 480 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 481 bool is_volatile) const; 482 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 483 bool is_volatile) const; 484 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 485 bool is_volatile) const; 486 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 487 bool is_volatile) const; 488 void RecordWriteFieldReference(mirror::Object* obj, 489 MemberOffset field_offset, 490 ObjPtr<mirror::Object> value, 491 bool is_volatile) const 492 REQUIRES_SHARED(Locks::mutator_lock_); 493 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 494 REQUIRES_SHARED(Locks::mutator_lock_); 495 void RecordStrongStringInsertion(ObjPtr<mirror::String> s) const 496 REQUIRES(Locks::intern_table_lock_); 497 void RecordWeakStringInsertion(ObjPtr<mirror::String> s) const 498 REQUIRES(Locks::intern_table_lock_); 499 void RecordStrongStringRemoval(ObjPtr<mirror::String> s) const 500 REQUIRES(Locks::intern_table_lock_); 501 void RecordWeakStringRemoval(ObjPtr<mirror::String> s) const 502 REQUIRES(Locks::intern_table_lock_); 503 void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, dex::StringIndex string_idx) const 504 REQUIRES_SHARED(Locks::mutator_lock_); 505 506 void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_); 507 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 508 // with the unexpected_signal_lock_. 509 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 510 return fault_message_; 511 } 512 513 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 514 515 bool ExplicitStackOverflowChecks() const { 516 return !implicit_so_checks_; 517 } 518 519 void DisableVerifier(); 520 bool IsVerificationEnabled() const; 521 bool IsVerificationSoftFail() const; 522 523 void SetHiddenApiChecksEnabled(bool value) { 524 do_hidden_api_checks_ = value; 525 } 526 527 bool AreHiddenApiChecksEnabled() const { 528 return do_hidden_api_checks_; 529 } 530 531 void SetPendingHiddenApiWarning(bool value) { 532 pending_hidden_api_warning_ = value; 533 } 534 535 bool HasPendingHiddenApiWarning() const { 536 return pending_hidden_api_warning_; 537 } 538 539 void SetDedupeHiddenApiWarnings(bool value) { 540 dedupe_hidden_api_warnings_ = value; 541 } 542 543 bool ShouldDedupeHiddenApiWarnings() { 544 return dedupe_hidden_api_warnings_; 545 } 546 547 bool IsDexFileFallbackEnabled() const { 548 return allow_dex_file_fallback_; 549 } 550 551 const std::vector<std::string>& GetCpuAbilist() const { 552 return cpu_abilist_; 553 } 554 555 bool IsRunningOnMemoryTool() const { 556 return is_running_on_memory_tool_; 557 } 558 559 void SetTargetSdkVersion(int32_t version) { 560 target_sdk_version_ = version; 561 } 562 563 int32_t GetTargetSdkVersion() const { 564 return target_sdk_version_; 565 } 566 567 uint32_t GetZygoteMaxFailedBoots() const { 568 return zygote_max_failed_boots_; 569 } 570 571 bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) { 572 return (experimental_flags_ & flags) != ExperimentalFlags::kNone; 573 } 574 575 // Create the JIT and instrumentation and code cache. 576 void CreateJit(); 577 578 ArenaPool* GetArenaPool() { 579 return arena_pool_.get(); 580 } 581 ArenaPool* GetJitArenaPool() { 582 return jit_arena_pool_.get(); 583 } 584 const ArenaPool* GetArenaPool() const { 585 return arena_pool_.get(); 586 } 587 588 void ReclaimArenaPoolMemory(); 589 590 LinearAlloc* GetLinearAlloc() { 591 return linear_alloc_.get(); 592 } 593 594 jit::JitOptions* GetJITOptions() { 595 return jit_options_.get(); 596 } 597 598 bool IsJavaDebuggable() const { 599 return is_java_debuggable_; 600 } 601 602 void SetJavaDebuggable(bool value); 603 604 // Deoptimize the boot image, called for Java debuggable apps. 605 void DeoptimizeBootImage(); 606 607 bool IsNativeDebuggable() const { 608 return is_native_debuggable_; 609 } 610 611 void SetNativeDebuggable(bool value) { 612 is_native_debuggable_ = value; 613 } 614 615 bool AreAsyncExceptionsThrown() const { 616 return async_exceptions_thrown_; 617 } 618 619 void SetAsyncExceptionsThrown() { 620 async_exceptions_thrown_ = true; 621 } 622 623 // Returns the build fingerprint, if set. Otherwise an empty string is returned. 624 std::string GetFingerprint() { 625 return fingerprint_; 626 } 627 628 // Called from class linker. 629 void SetSentinel(mirror::Object* sentinel) REQUIRES_SHARED(Locks::mutator_lock_); 630 631 // Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler. 632 LinearAlloc* CreateLinearAlloc(); 633 634 OatFileManager& GetOatFileManager() const { 635 DCHECK(oat_file_manager_ != nullptr); 636 return *oat_file_manager_; 637 } 638 639 double GetHashTableMinLoadFactor() const; 640 double GetHashTableMaxLoadFactor() const; 641 642 void SetSafeMode(bool mode) { 643 safe_mode_ = mode; 644 } 645 646 bool GetDumpNativeStackOnSigQuit() const { 647 return dump_native_stack_on_sig_quit_; 648 } 649 650 bool GetPrunedDalvikCache() const { 651 return pruned_dalvik_cache_; 652 } 653 654 void SetPrunedDalvikCache(bool pruned) { 655 pruned_dalvik_cache_ = pruned; 656 } 657 658 void UpdateProcessState(ProcessState process_state); 659 660 // Returns true if we currently care about long mutator pause. 661 bool InJankPerceptibleProcessState() const { 662 return process_state_ == kProcessStateJankPerceptible; 663 } 664 665 void RegisterSensitiveThread() const; 666 667 void SetZygoteNoThreadSection(bool val) { 668 zygote_no_threads_ = val; 669 } 670 671 bool IsZygoteNoThreadSection() const { 672 return zygote_no_threads_; 673 } 674 675 // Returns if the code can be deoptimized asynchronously. Code may be compiled with some 676 // optimization that makes it impossible to deoptimize. 677 bool IsAsyncDeoptimizeable(uintptr_t code) const REQUIRES_SHARED(Locks::mutator_lock_); 678 679 // Returns a saved copy of the environment (getenv/setenv values). 680 // Used by Fork to protect against overwriting LD_LIBRARY_PATH, etc. 681 char** GetEnvSnapshot() const { 682 return env_snapshot_.GetSnapshot(); 683 } 684 685 void AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 686 void RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 687 688 void AttachAgent(JNIEnv* env, 689 const std::string& agent_arg, 690 jobject class_loader, 691 bool allow_non_debuggable_tooling = false); 692 693 const std::list<std::unique_ptr<ti::Agent>>& GetAgents() const { 694 return agents_; 695 } 696 697 RuntimeCallbacks* GetRuntimeCallbacks(); 698 699 bool HasLoadedPlugins() const { 700 return !plugins_.empty(); 701 } 702 703 void InitThreadGroups(Thread* self); 704 705 void SetDumpGCPerformanceOnShutdown(bool value) { 706 dump_gc_performance_on_shutdown_ = value; 707 } 708 709 void IncrementDeoptimizationCount(DeoptimizationKind kind) { 710 DCHECK_LE(kind, DeoptimizationKind::kLast); 711 deoptimization_counts_[static_cast<size_t>(kind)]++; 712 } 713 714 uint32_t GetNumberOfDeoptimizations() const { 715 uint32_t result = 0; 716 for (size_t i = 0; i <= static_cast<size_t>(DeoptimizationKind::kLast); ++i) { 717 result += deoptimization_counts_[i]; 718 } 719 return result; 720 } 721 722 // Whether or not we use MADV_RANDOM on files that are thought to have random access patterns. 723 // This is beneficial for low RAM devices since it reduces page cache thrashing. 724 bool MAdviseRandomAccess() const { 725 return madvise_random_access_; 726 } 727 728 const std::string& GetJdwpOptions() { 729 return jdwp_options_; 730 } 731 732 JdwpProvider GetJdwpProvider() const { 733 return jdwp_provider_; 734 } 735 736 static constexpr int32_t kUnsetSdkVersion = 0u; 737 738 private: 739 static void InitPlatformSignalHandlers(); 740 741 Runtime(); 742 743 void BlockSignals(); 744 745 bool Init(RuntimeArgumentMap&& runtime_options) 746 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 747 void InitNativeMethods() REQUIRES(!Locks::mutator_lock_); 748 void RegisterRuntimeNativeMethods(JNIEnv* env); 749 750 void StartDaemonThreads(); 751 void StartSignalCatcher(); 752 753 void MaybeSaveJitProfilingInfo(); 754 755 // Visit all of the thread roots. 756 void VisitThreadRoots(RootVisitor* visitor, VisitRootFlags flags) 757 REQUIRES_SHARED(Locks::mutator_lock_); 758 759 // Visit all other roots which must be done with mutators suspended. 760 void VisitNonConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) 761 REQUIRES_SHARED(Locks::mutator_lock_); 762 763 // Constant roots are the roots which never change after the runtime is initialized, they only 764 // need to be visited once per GC cycle. 765 void VisitConstantRoots(RootVisitor* visitor) 766 REQUIRES_SHARED(Locks::mutator_lock_); 767 768 // A pointer to the active runtime or null. 769 static Runtime* instance_; 770 771 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 772 static constexpr int kProfileForground = 0; 773 static constexpr int kProfileBackground = 1; 774 775 static constexpr uint32_t kCalleeSaveSize = 6u; 776 777 // 64 bit so that we can share the same asm offsets for both 32 and 64 bits. 778 uint64_t callee_save_methods_[kCalleeSaveSize]; 779 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 780 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 781 ArtMethod* resolution_method_; 782 ArtMethod* imt_conflict_method_; 783 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 784 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 785 ArtMethod* imt_unimplemented_method_; 786 787 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 788 // JDWP (invalid references). 789 GcRoot<mirror::Object> sentinel_; 790 791 InstructionSet instruction_set_; 792 QuickMethodFrameInfo callee_save_method_frame_infos_[kCalleeSaveSize]; 793 794 CompilerCallbacks* compiler_callbacks_; 795 bool is_zygote_; 796 bool must_relocate_; 797 bool is_concurrent_gc_enabled_; 798 bool is_explicit_gc_disabled_; 799 bool dex2oat_enabled_; 800 bool image_dex2oat_enabled_; 801 802 std::string compiler_executable_; 803 std::string patchoat_executable_; 804 std::vector<std::string> compiler_options_; 805 std::vector<std::string> image_compiler_options_; 806 std::string image_location_; 807 808 std::string boot_class_path_string_; 809 std::string class_path_string_; 810 std::vector<std::string> properties_; 811 812 std::list<ti::AgentSpec> agent_specs_; 813 std::list<std::unique_ptr<ti::Agent>> agents_; 814 std::vector<Plugin> plugins_; 815 816 // The default stack size for managed threads created by the runtime. 817 size_t default_stack_size_; 818 819 gc::Heap* heap_; 820 821 std::unique_ptr<ArenaPool> jit_arena_pool_; 822 std::unique_ptr<ArenaPool> arena_pool_; 823 // Special low 4gb pool for compiler linear alloc. We need ArtFields to be in low 4gb if we are 824 // compiling using a 32 bit image on a 64 bit compiler in case we resolve things in the image 825 // since the field arrays are int arrays in this case. 826 std::unique_ptr<ArenaPool> low_4gb_arena_pool_; 827 828 // Shared linear alloc for now. 829 std::unique_ptr<LinearAlloc> linear_alloc_; 830 831 // The number of spins that are done before thread suspension is used to forcibly inflate. 832 size_t max_spins_before_thin_lock_inflation_; 833 MonitorList* monitor_list_; 834 MonitorPool* monitor_pool_; 835 836 ThreadList* thread_list_; 837 838 InternTable* intern_table_; 839 840 ClassLinker* class_linker_; 841 842 SignalCatcher* signal_catcher_; 843 844 // If true, the runtime will connect to tombstoned via a socket to 845 // request an open file descriptor to write its traces to. 846 bool use_tombstoned_traces_; 847 848 // Location to which traces must be written on SIGQUIT. Only used if 849 // tombstoned_traces_ == false. 850 std::string stack_trace_file_; 851 852 std::unique_ptr<JavaVMExt> java_vm_; 853 854 std::unique_ptr<jit::Jit> jit_; 855 std::unique_ptr<jit::JitOptions> jit_options_; 856 857 // Fault message, printed when we get a SIGSEGV. 858 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 859 std::string fault_message_ GUARDED_BY(fault_message_lock_); 860 861 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 862 // the shutdown lock so that threads aren't born while we're shutting down. 863 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 864 865 // Waited upon until no threads are being born. 866 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 867 868 // Set when runtime shutdown is past the point that new threads may attach. 869 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 870 871 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 872 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 873 874 bool started_; 875 876 // New flag added which tells us if the runtime has finished starting. If 877 // this flag is set then the Daemon threads are created and the class loader 878 // is created. This flag is needed for knowing if its safe to request CMS. 879 bool finished_starting_; 880 881 // Hooks supported by JNI_CreateJavaVM 882 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 883 void (*exit_)(jint status); 884 void (*abort_)(); 885 886 bool stats_enabled_; 887 RuntimeStats stats_; 888 889 const bool is_running_on_memory_tool_; 890 891 std::unique_ptr<TraceConfig> trace_config_; 892 893 instrumentation::Instrumentation instrumentation_; 894 895 jobject main_thread_group_; 896 jobject system_thread_group_; 897 898 // As returned by ClassLoader.getSystemClassLoader(). 899 jobject system_class_loader_; 900 901 // If true, then we dump the GC cumulative timings on shutdown. 902 bool dump_gc_performance_on_shutdown_; 903 904 // Transactions used for pre-initializing classes at compilation time. 905 // Support nested transactions, maintain a list containing all transactions. Transactions are 906 // handled under a stack discipline. Because GC needs to go over all transactions, we choose list 907 // as substantial data structure instead of stack. 908 std::list<std::unique_ptr<Transaction>> preinitialization_transactions_; 909 910 // If kNone, verification is disabled. kEnable by default. 911 verifier::VerifyMode verify_; 912 913 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 914 // available/usable. 915 bool allow_dex_file_fallback_; 916 917 // List of supported cpu abis. 918 std::vector<std::string> cpu_abilist_; 919 920 // Specifies target SDK version to allow workarounds for certain API levels. 921 int32_t target_sdk_version_; 922 923 // Implicit checks flags. 924 bool implicit_null_checks_; // NullPointer checks are implicit. 925 bool implicit_so_checks_; // StackOverflow checks are implicit. 926 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 927 928 // Whether or not the sig chain (and implicitly the fault handler) should be 929 // disabled. Tools like dex2oat or patchoat don't need them. This enables 930 // building a statically link version of dex2oat. 931 bool no_sig_chain_; 932 933 // Force the use of native bridge even if the app ISA matches the runtime ISA. 934 bool force_native_bridge_; 935 936 // Whether or not a native bridge has been loaded. 937 // 938 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 939 // if standard dlopen fails to load native library associated with native activity, it calls to 940 // the native bridge to load it and then gets the trampoline for the entry to native activity. 941 // 942 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 943 // When non-empty the native bridge will be loaded from the given file. An empty value means 944 // that there's no native bridge. 945 bool is_native_bridge_loaded_; 946 947 // Whether we are running under native debugger. 948 bool is_native_debuggable_; 949 950 // whether or not any async exceptions have ever been thrown. This is used to speed up the 951 // MterpShouldSwitchInterpreters function. 952 bool async_exceptions_thrown_; 953 954 // Whether Java code needs to be debuggable. 955 bool is_java_debuggable_; 956 957 // The maximum number of failed boots we allow before pruning the dalvik cache 958 // and trying again. This option is only inspected when we're running as a 959 // zygote. 960 uint32_t zygote_max_failed_boots_; 961 962 // Enable experimental opcodes that aren't fully specified yet. The intent is to 963 // eventually publish them as public-usable opcodes, but they aren't ready yet. 964 // 965 // Experimental opcodes should not be used by other production code. 966 ExperimentalFlags experimental_flags_; 967 968 // Contains the build fingerprint, if given as a parameter. 969 std::string fingerprint_; 970 971 // Oat file manager, keeps track of what oat files are open. 972 OatFileManager* oat_file_manager_; 973 974 // Whether or not we are on a low RAM device. 975 bool is_low_memory_mode_; 976 977 // Whether or not we use MADV_RANDOM on files that are thought to have random access patterns. 978 // This is beneficial for low RAM devices since it reduces page cache thrashing. 979 bool madvise_random_access_; 980 981 // Whether the application should run in safe mode, that is, interpreter only. 982 bool safe_mode_; 983 984 // Whether access checks on hidden API should be performed. 985 bool do_hidden_api_checks_; 986 987 // Whether the application has used an API which is not restricted but we 988 // should issue a warning about it. 989 bool pending_hidden_api_warning_; 990 991 // Do not warn about the same hidden API access violation twice. 992 // This is only used for testing. 993 bool dedupe_hidden_api_warnings_; 994 995 // Whether threads should dump their native stack on SIGQUIT. 996 bool dump_native_stack_on_sig_quit_; 997 998 // Whether the dalvik cache was pruned when initializing the runtime. 999 bool pruned_dalvik_cache_; 1000 1001 // Whether or not we currently care about pause times. 1002 ProcessState process_state_; 1003 1004 // Whether zygote code is in a section that should not start threads. 1005 bool zygote_no_threads_; 1006 1007 // The string containing requested jdwp options 1008 std::string jdwp_options_; 1009 1010 // The jdwp provider we were configured with. 1011 JdwpProvider jdwp_provider_; 1012 1013 // Saved environment. 1014 class EnvSnapshot { 1015 public: 1016 EnvSnapshot() = default; 1017 void TakeSnapshot(); 1018 char** GetSnapshot() const; 1019 1020 private: 1021 std::unique_ptr<char*[]> c_env_vector_; 1022 std::vector<std::unique_ptr<std::string>> name_value_pairs_; 1023 1024 DISALLOW_COPY_AND_ASSIGN(EnvSnapshot); 1025 } env_snapshot_; 1026 1027 // Generic system-weak holders. 1028 std::vector<gc::AbstractSystemWeakHolder*> system_weak_holders_; 1029 1030 std::unique_ptr<RuntimeCallbacks> callbacks_; 1031 1032 std::atomic<uint32_t> deoptimization_counts_[ 1033 static_cast<uint32_t>(DeoptimizationKind::kLast) + 1]; 1034 1035 std::unique_ptr<MemMap> protected_fault_page_; 1036 1037 DISALLOW_COPY_AND_ASSIGN(Runtime); 1038}; 1039 1040} // namespace art 1041 1042#endif // ART_RUNTIME_RUNTIME_H_ 1043