runtime.h revision b3da36c182329f228b8c78d306a57fa11a6004ea
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 <vector> 28 29#include "arch/instruction_set.h" 30#include "base/macros.h" 31#include "dex_file_types.h" 32#include "experimental_flags.h" 33#include "gc_root.h" 34#include "instrumentation.h" 35#include "jobject_comparator.h" 36#include "method_reference.h" 37#include "obj_ptr.h" 38#include "object_callbacks.h" 39#include "offsets.h" 40#include "process_state.h" 41#include "quick/quick_method_frame_info.h" 42#include "runtime_stats.h" 43#include "safe_map.h" 44 45namespace art { 46 47namespace gc { 48 class AbstractSystemWeakHolder; 49 class Heap; 50 namespace collector { 51 class GarbageCollector; 52 } // namespace collector 53} // namespace gc 54 55namespace jit { 56 class Jit; 57 class JitOptions; 58} // namespace jit 59 60namespace mirror { 61 class Array; 62 class ClassLoader; 63 class DexCache; 64 template<class T> class ObjectArray; 65 template<class T> class PrimitiveArray; 66 typedef PrimitiveArray<int8_t> ByteArray; 67 class String; 68 class Throwable; 69} // namespace mirror 70namespace ti { 71 class Agent; 72} // namespace ti 73namespace verifier { 74 class MethodVerifier; 75 enum class VerifyMode : int8_t; 76} // namespace verifier 77class ArenaPool; 78class ArtMethod; 79class ClassHierarchyAnalysis; 80class ClassLinker; 81class Closure; 82class CompilerCallbacks; 83class DexFile; 84class InternTable; 85class JavaVMExt; 86class LinearAlloc; 87class MonitorList; 88class MonitorPool; 89class NullPointerHandler; 90class OatFileManager; 91class Plugin; 92struct RuntimeArgumentMap; 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 DumpForSigQuit(std::ostream& os); 238 void DumpLockHolders(std::ostream& os); 239 240 ~Runtime(); 241 242 const std::string& GetBootClassPathString() const { 243 return boot_class_path_string_; 244 } 245 246 const std::string& GetClassPathString() const { 247 return class_path_string_; 248 } 249 250 ClassLinker* GetClassLinker() const { 251 return class_linker_; 252 } 253 254 size_t GetDefaultStackSize() const { 255 return default_stack_size_; 256 } 257 258 gc::Heap* GetHeap() const { 259 return heap_; 260 } 261 262 InternTable* GetInternTable() const { 263 DCHECK(intern_table_ != nullptr); 264 return intern_table_; 265 } 266 267 JavaVMExt* GetJavaVM() const { 268 return java_vm_.get(); 269 } 270 271 size_t GetMaxSpinsBeforeThinLockInflation() const { 272 return max_spins_before_thin_lock_inflation_; 273 } 274 275 MonitorList* GetMonitorList() const { 276 return monitor_list_; 277 } 278 279 MonitorPool* GetMonitorPool() const { 280 return monitor_pool_; 281 } 282 283 // Is the given object the special object used to mark a cleared JNI weak global? 284 bool IsClearedJniWeakGlobal(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 285 286 // Get the special object used to mark a cleared JNI weak global. 287 mirror::Object* GetClearedJniWeakGlobal() REQUIRES_SHARED(Locks::mutator_lock_); 288 289 mirror::Throwable* GetPreAllocatedOutOfMemoryError() REQUIRES_SHARED(Locks::mutator_lock_); 290 291 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 292 REQUIRES_SHARED(Locks::mutator_lock_); 293 294 const std::vector<std::string>& GetProperties() const { 295 return properties_; 296 } 297 298 ThreadList* GetThreadList() const { 299 return thread_list_; 300 } 301 302 static const char* GetVersion() { 303 return "2.1.0"; 304 } 305 306 bool IsMethodHandlesEnabled() const { 307 return experimental_flags_ & ExperimentalFlags::kMethodHandles; 308 } 309 310 void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 311 void AllowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 312 // broadcast_for_checkpoint is true when we broadcast for making blocking threads to respond to 313 // checkpoint requests. It's false when we broadcast to unblock blocking threads after system weak 314 // access is reenabled. 315 void BroadcastForNewSystemWeaks(bool broadcast_for_checkpoint = false); 316 317 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 318 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 319 void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots) 320 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 321 REQUIRES_SHARED(Locks::mutator_lock_); 322 323 // Visit image roots, only used for hprof since the GC uses the image space mod union table 324 // instead. 325 void VisitImageRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 326 327 // Visit all of the roots we can do safely do concurrently. 328 void VisitConcurrentRoots(RootVisitor* visitor, 329 VisitRootFlags flags = kVisitRootFlagAllRoots) 330 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 331 REQUIRES_SHARED(Locks::mutator_lock_); 332 333 // Visit all of the non thread roots, we can do this with mutators unpaused. 334 void VisitNonThreadRoots(RootVisitor* visitor) 335 REQUIRES_SHARED(Locks::mutator_lock_); 336 337 void VisitTransactionRoots(RootVisitor* visitor) 338 REQUIRES_SHARED(Locks::mutator_lock_); 339 340 // Flip thread roots from from-space refs to to-space refs. 341 size_t FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 342 gc::collector::GarbageCollector* collector) 343 REQUIRES(!Locks::mutator_lock_); 344 345 // Sweep system weaks, the system weak is deleted if the visitor return null. Otherwise, the 346 // system weak is updated to be the visitor's returned value. 347 void SweepSystemWeaks(IsMarkedVisitor* visitor) 348 REQUIRES_SHARED(Locks::mutator_lock_); 349 350 // Returns a special method that calls into a trampoline for runtime method resolution 351 ArtMethod* GetResolutionMethod(); 352 353 bool HasResolutionMethod() const { 354 return resolution_method_ != nullptr; 355 } 356 357 void SetResolutionMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 358 359 ArtMethod* CreateResolutionMethod() REQUIRES_SHARED(Locks::mutator_lock_); 360 361 // Returns a special method that calls into a trampoline for runtime imt conflicts. 362 ArtMethod* GetImtConflictMethod(); 363 ArtMethod* GetImtUnimplementedMethod(); 364 365 bool HasImtConflictMethod() const { 366 return imt_conflict_method_ != nullptr; 367 } 368 369 void FixupConflictTables(); 370 void SetImtConflictMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 371 void SetImtUnimplementedMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 372 373 ArtMethod* CreateImtConflictMethod(LinearAlloc* linear_alloc) 374 REQUIRES_SHARED(Locks::mutator_lock_); 375 376 // Returns a special method that describes all callee saves being spilled to the stack. 377 enum CalleeSaveType { 378 kSaveAllCalleeSaves, // All callee-save registers. 379 kSaveRefsOnly, // Only those callee-save registers that can hold references. 380 kSaveRefsAndArgs, // References (see above) and arguments (usually caller-save registers). 381 kSaveEverything, // All registers, including both callee-save and caller-save. 382 kLastCalleeSaveType // Value used for iteration 383 }; 384 385 bool HasCalleeSaveMethod(CalleeSaveType type) const { 386 return callee_save_methods_[type] != 0u; 387 } 388 389 ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 390 REQUIRES_SHARED(Locks::mutator_lock_); 391 392 ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 393 REQUIRES_SHARED(Locks::mutator_lock_); 394 395 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 396 return callee_save_method_frame_infos_[type]; 397 } 398 399 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method) 400 REQUIRES_SHARED(Locks::mutator_lock_); 401 402 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 403 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[type]); 404 } 405 406 InstructionSet GetInstructionSet() const { 407 return instruction_set_; 408 } 409 410 void SetInstructionSet(InstructionSet instruction_set); 411 412 void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type); 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() { 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 const std::string& foreign_dex_profile_path, 458 const std::string& app_dir); 459 void NotifyDexLoaded(const std::string& dex_location); 460 461 // Transaction support. 462 bool IsActiveTransaction() const { 463 return preinitialization_transaction_ != nullptr; 464 } 465 void EnterTransactionMode(Transaction* transaction); 466 void ExitTransactionMode(); 467 bool IsTransactionAborted() const; 468 469 void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) 470 REQUIRES_SHARED(Locks::mutator_lock_); 471 void ThrowTransactionAbortError(Thread* self) 472 REQUIRES_SHARED(Locks::mutator_lock_); 473 474 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 475 bool is_volatile) const; 476 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 477 bool is_volatile) const; 478 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 479 bool is_volatile) const; 480 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 481 bool is_volatile) const; 482 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 483 bool is_volatile) const; 484 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 485 bool is_volatile) const; 486 void RecordWriteFieldReference(mirror::Object* obj, 487 MemberOffset field_offset, 488 ObjPtr<mirror::Object> value, 489 bool is_volatile) const 490 REQUIRES_SHARED(Locks::mutator_lock_); 491 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 492 REQUIRES_SHARED(Locks::mutator_lock_); 493 void RecordStrongStringInsertion(ObjPtr<mirror::String> s) const 494 REQUIRES(Locks::intern_table_lock_); 495 void RecordWeakStringInsertion(ObjPtr<mirror::String> s) const 496 REQUIRES(Locks::intern_table_lock_); 497 void RecordStrongStringRemoval(ObjPtr<mirror::String> s) const 498 REQUIRES(Locks::intern_table_lock_); 499 void RecordWeakStringRemoval(ObjPtr<mirror::String> s) const 500 REQUIRES(Locks::intern_table_lock_); 501 void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, dex::StringIndex string_idx) const 502 REQUIRES_SHARED(Locks::mutator_lock_); 503 504 void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_); 505 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 506 // with the unexpected_signal_lock_. 507 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 508 return fault_message_; 509 } 510 511 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 512 513 bool ExplicitStackOverflowChecks() const { 514 return !implicit_so_checks_; 515 } 516 517 bool IsVerificationEnabled() const; 518 bool IsVerificationSoftFail() const; 519 520 bool IsDexFileFallbackEnabled() const { 521 return allow_dex_file_fallback_; 522 } 523 524 const std::vector<std::string>& GetCpuAbilist() const { 525 return cpu_abilist_; 526 } 527 528 bool IsRunningOnMemoryTool() const { 529 return is_running_on_memory_tool_; 530 } 531 532 void SetTargetSdkVersion(int32_t version) { 533 target_sdk_version_ = version; 534 } 535 536 int32_t GetTargetSdkVersion() const { 537 return target_sdk_version_; 538 } 539 540 uint32_t GetZygoteMaxFailedBoots() const { 541 return zygote_max_failed_boots_; 542 } 543 544 bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) { 545 return (experimental_flags_ & flags) != ExperimentalFlags::kNone; 546 } 547 548 // Create the JIT and instrumentation and code cache. 549 void CreateJit(); 550 551 ArenaPool* GetArenaPool() { 552 return arena_pool_.get(); 553 } 554 ArenaPool* GetJitArenaPool() { 555 return jit_arena_pool_.get(); 556 } 557 const ArenaPool* GetArenaPool() const { 558 return arena_pool_.get(); 559 } 560 561 void ReclaimArenaPoolMemory(); 562 563 LinearAlloc* GetLinearAlloc() { 564 return linear_alloc_.get(); 565 } 566 567 jit::JitOptions* GetJITOptions() { 568 return jit_options_.get(); 569 } 570 571 bool IsDebuggable() const; 572 573 bool IsFullyDeoptable() const { 574 return is_fully_deoptable_; 575 } 576 577 void SetFullyDeoptable(bool value) { 578 is_fully_deoptable_ = value; 579 } 580 581 bool IsNativeDebuggable() const { 582 return is_native_debuggable_; 583 } 584 585 void SetNativeDebuggable(bool value) { 586 is_native_debuggable_ = value; 587 } 588 589 // Returns the build fingerprint, if set. Otherwise an empty string is returned. 590 std::string GetFingerprint() { 591 return fingerprint_; 592 } 593 594 // Called from class linker. 595 void SetSentinel(mirror::Object* sentinel) REQUIRES_SHARED(Locks::mutator_lock_); 596 597 // Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler. 598 LinearAlloc* CreateLinearAlloc(); 599 600 OatFileManager& GetOatFileManager() const { 601 DCHECK(oat_file_manager_ != nullptr); 602 return *oat_file_manager_; 603 } 604 605 double GetHashTableMinLoadFactor() const; 606 double GetHashTableMaxLoadFactor() const; 607 608 void SetSafeMode(bool mode) { 609 safe_mode_ = mode; 610 } 611 612 bool GetDumpNativeStackOnSigQuit() const { 613 return dump_native_stack_on_sig_quit_; 614 } 615 616 bool GetPrunedDalvikCache() const { 617 return pruned_dalvik_cache_; 618 } 619 620 void SetPrunedDalvikCache(bool pruned) { 621 pruned_dalvik_cache_ = pruned; 622 } 623 624 void UpdateProcessState(ProcessState process_state); 625 626 // Returns true if we currently care about long mutator pause. 627 bool InJankPerceptibleProcessState() const { 628 return process_state_ == kProcessStateJankPerceptible; 629 } 630 631 void RegisterSensitiveThread() const; 632 633 void SetZygoteNoThreadSection(bool val) { 634 zygote_no_threads_ = val; 635 } 636 637 bool IsZygoteNoThreadSection() const { 638 return zygote_no_threads_; 639 } 640 641 // Returns if the code can be deoptimized. Code may be compiled with some 642 // optimization that makes it impossible to deoptimize. 643 bool IsDeoptimizeable(uintptr_t code) const REQUIRES_SHARED(Locks::mutator_lock_); 644 645 // Returns a saved copy of the environment (getenv/setenv values). 646 // Used by Fork to protect against overwriting LD_LIBRARY_PATH, etc. 647 char** GetEnvSnapshot() const { 648 return env_snapshot_.GetSnapshot(); 649 } 650 651 void AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 652 void RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 653 654 ClassHierarchyAnalysis* GetClassHierarchyAnalysis() { 655 return cha_; 656 } 657 658 NO_RETURN 659 static void Aborter(const char* abort_message); 660 661 void AttachAgent(const std::string& agent_arg); 662 663 private: 664 static void InitPlatformSignalHandlers(); 665 666 Runtime(); 667 668 void BlockSignals(); 669 670 bool Init(RuntimeArgumentMap&& runtime_options) 671 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 672 void InitNativeMethods() REQUIRES(!Locks::mutator_lock_); 673 void InitThreadGroups(Thread* self); 674 void RegisterRuntimeNativeMethods(JNIEnv* env); 675 676 void StartDaemonThreads(); 677 void StartSignalCatcher(); 678 679 void MaybeSaveJitProfilingInfo(); 680 681 // Visit all of the thread roots. 682 void VisitThreadRoots(RootVisitor* visitor, VisitRootFlags flags) 683 REQUIRES_SHARED(Locks::mutator_lock_); 684 685 // Visit all other roots which must be done with mutators suspended. 686 void VisitNonConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) 687 REQUIRES_SHARED(Locks::mutator_lock_); 688 689 // Constant roots are the roots which never change after the runtime is initialized, they only 690 // need to be visited once per GC cycle. 691 void VisitConstantRoots(RootVisitor* visitor) 692 REQUIRES_SHARED(Locks::mutator_lock_); 693 694 // A pointer to the active runtime or null. 695 static Runtime* instance_; 696 697 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 698 static constexpr int kProfileForground = 0; 699 static constexpr int kProfileBackground = 1; 700 701 // 64 bit so that we can share the same asm offsets for both 32 and 64 bits. 702 uint64_t callee_save_methods_[kLastCalleeSaveType]; 703 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 704 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 705 ArtMethod* resolution_method_; 706 ArtMethod* imt_conflict_method_; 707 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 708 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 709 ArtMethod* imt_unimplemented_method_; 710 711 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 712 // JDWP (invalid references). 713 GcRoot<mirror::Object> sentinel_; 714 715 InstructionSet instruction_set_; 716 QuickMethodFrameInfo callee_save_method_frame_infos_[kLastCalleeSaveType]; 717 718 CompilerCallbacks* compiler_callbacks_; 719 bool is_zygote_; 720 bool must_relocate_; 721 bool is_concurrent_gc_enabled_; 722 bool is_explicit_gc_disabled_; 723 bool dex2oat_enabled_; 724 bool image_dex2oat_enabled_; 725 726 std::string compiler_executable_; 727 std::string patchoat_executable_; 728 std::vector<std::string> compiler_options_; 729 std::vector<std::string> image_compiler_options_; 730 std::string image_location_; 731 732 std::string boot_class_path_string_; 733 std::string class_path_string_; 734 std::vector<std::string> properties_; 735 736 std::vector<ti::Agent> agents_; 737 std::vector<Plugin> plugins_; 738 739 // The default stack size for managed threads created by the runtime. 740 size_t default_stack_size_; 741 742 gc::Heap* heap_; 743 744 std::unique_ptr<ArenaPool> jit_arena_pool_; 745 std::unique_ptr<ArenaPool> arena_pool_; 746 // Special low 4gb pool for compiler linear alloc. We need ArtFields to be in low 4gb if we are 747 // compiling using a 32 bit image on a 64 bit compiler in case we resolve things in the image 748 // since the field arrays are int arrays in this case. 749 std::unique_ptr<ArenaPool> low_4gb_arena_pool_; 750 751 // Shared linear alloc for now. 752 std::unique_ptr<LinearAlloc> linear_alloc_; 753 754 // The number of spins that are done before thread suspension is used to forcibly inflate. 755 size_t max_spins_before_thin_lock_inflation_; 756 MonitorList* monitor_list_; 757 MonitorPool* monitor_pool_; 758 759 ThreadList* thread_list_; 760 761 InternTable* intern_table_; 762 763 ClassLinker* class_linker_; 764 765 SignalCatcher* signal_catcher_; 766 std::string stack_trace_file_; 767 768 std::unique_ptr<JavaVMExt> java_vm_; 769 770 std::unique_ptr<jit::Jit> jit_; 771 std::unique_ptr<jit::JitOptions> jit_options_; 772 773 // Fault message, printed when we get a SIGSEGV. 774 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 775 std::string fault_message_ GUARDED_BY(fault_message_lock_); 776 777 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 778 // the shutdown lock so that threads aren't born while we're shutting down. 779 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 780 781 // Waited upon until no threads are being born. 782 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 783 784 // Set when runtime shutdown is past the point that new threads may attach. 785 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 786 787 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 788 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 789 790 bool started_; 791 792 // New flag added which tells us if the runtime has finished starting. If 793 // this flag is set then the Daemon threads are created and the class loader 794 // is created. This flag is needed for knowing if its safe to request CMS. 795 bool finished_starting_; 796 797 // Hooks supported by JNI_CreateJavaVM 798 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 799 void (*exit_)(jint status); 800 void (*abort_)(); 801 802 bool stats_enabled_; 803 RuntimeStats stats_; 804 805 const bool is_running_on_memory_tool_; 806 807 std::unique_ptr<TraceConfig> trace_config_; 808 809 instrumentation::Instrumentation instrumentation_; 810 811 jobject main_thread_group_; 812 jobject system_thread_group_; 813 814 // As returned by ClassLoader.getSystemClassLoader(). 815 jobject system_class_loader_; 816 817 // If true, then we dump the GC cumulative timings on shutdown. 818 bool dump_gc_performance_on_shutdown_; 819 820 // Transaction used for pre-initializing classes at compilation time. 821 Transaction* preinitialization_transaction_; 822 823 // If kNone, verification is disabled. kEnable by default. 824 verifier::VerifyMode verify_; 825 826 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 827 // available/usable. 828 bool allow_dex_file_fallback_; 829 830 // List of supported cpu abis. 831 std::vector<std::string> cpu_abilist_; 832 833 // Specifies target SDK version to allow workarounds for certain API levels. 834 int32_t target_sdk_version_; 835 836 // Implicit checks flags. 837 bool implicit_null_checks_; // NullPointer checks are implicit. 838 bool implicit_so_checks_; // StackOverflow checks are implicit. 839 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 840 841 // Whether or not the sig chain (and implicitly the fault handler) should be 842 // disabled. Tools like dex2oat or patchoat don't need them. This enables 843 // building a statically link version of dex2oat. 844 bool no_sig_chain_; 845 846 // Force the use of native bridge even if the app ISA matches the runtime ISA. 847 bool force_native_bridge_; 848 849 // Whether or not a native bridge has been loaded. 850 // 851 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 852 // if standard dlopen fails to load native library associated with native activity, it calls to 853 // the native bridge to load it and then gets the trampoline for the entry to native activity. 854 // 855 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 856 // When non-empty the native bridge will be loaded from the given file. An empty value means 857 // that there's no native bridge. 858 bool is_native_bridge_loaded_; 859 860 // Whether we are running under native debugger. 861 bool is_native_debuggable_; 862 863 // Whether we are expected to be deoptable at all points. 864 bool is_fully_deoptable_; 865 866 // The maximum number of failed boots we allow before pruning the dalvik cache 867 // and trying again. This option is only inspected when we're running as a 868 // zygote. 869 uint32_t zygote_max_failed_boots_; 870 871 // Enable experimental opcodes that aren't fully specified yet. The intent is to 872 // eventually publish them as public-usable opcodes, but they aren't ready yet. 873 // 874 // Experimental opcodes should not be used by other production code. 875 ExperimentalFlags experimental_flags_; 876 877 // Contains the build fingerprint, if given as a parameter. 878 std::string fingerprint_; 879 880 // Oat file manager, keeps track of what oat files are open. 881 OatFileManager* oat_file_manager_; 882 883 // Whether or not we are on a low RAM device. 884 bool is_low_memory_mode_; 885 886 // Whether the application should run in safe mode, that is, interpreter only. 887 bool safe_mode_; 888 889 // Whether threads should dump their native stack on SIGQUIT. 890 bool dump_native_stack_on_sig_quit_; 891 892 // Whether the dalvik cache was pruned when initializing the runtime. 893 bool pruned_dalvik_cache_; 894 895 // Whether or not we currently care about pause times. 896 ProcessState process_state_; 897 898 // Whether zygote code is in a section that should not start threads. 899 bool zygote_no_threads_; 900 901 // Saved environment. 902 class EnvSnapshot { 903 public: 904 EnvSnapshot() = default; 905 void TakeSnapshot(); 906 char** GetSnapshot() const; 907 908 private: 909 std::unique_ptr<char*[]> c_env_vector_; 910 std::vector<std::unique_ptr<std::string>> name_value_pairs_; 911 912 DISALLOW_COPY_AND_ASSIGN(EnvSnapshot); 913 } env_snapshot_; 914 915 // Generic system-weak holders. 916 std::vector<gc::AbstractSystemWeakHolder*> system_weak_holders_; 917 918 ClassHierarchyAnalysis* cha_; 919 920 DISALLOW_COPY_AND_ASSIGN(Runtime); 921}; 922std::ostream& operator<<(std::ostream& os, const Runtime::CalleeSaveType& rhs); 923 924} // namespace art 925 926#endif // ART_RUNTIME_RUNTIME_H_ 927