runtime.h revision d3e7c6c76f564b58e66010c30b62bb56ef046f2c
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 "experimental_flags.h" 32#include "gc_root.h" 33#include "instrumentation.h" 34#include "jobject_comparator.h" 35#include "method_reference.h" 36#include "object_callbacks.h" 37#include "offsets.h" 38#include "profiler_options.h" 39#include "quick/quick_method_frame_info.h" 40#include "runtime_stats.h" 41#include "safe_map.h" 42 43namespace art { 44 45namespace gc { 46 class Heap; 47 namespace collector { 48 class GarbageCollector; 49 } // namespace collector 50} // namespace gc 51 52namespace jit { 53 class Jit; 54 class JitOptions; 55} // namespace jit 56 57namespace lambda { 58 class BoxTable; 59} // namespace lambda 60 61namespace mirror { 62 class ClassLoader; 63 class Array; 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 verifier { 71 class MethodVerifier; 72 enum class VerifyMode : int8_t; 73} // namespace verifier 74class ArenaPool; 75class ArtMethod; 76class ClassLinker; 77class Closure; 78class CompilerCallbacks; 79class DexFile; 80class InternTable; 81class JavaVMExt; 82class LinearAlloc; 83class MonitorList; 84class MonitorPool; 85class NullPointerHandler; 86class OatFileManager; 87struct RuntimeArgumentMap; 88class SignalCatcher; 89class StackOverflowHandler; 90class SuspensionHandler; 91class ThreadList; 92class Trace; 93struct TraceConfig; 94class Transaction; 95 96typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 97typedef SafeMap<MethodReference, SafeMap<uint32_t, std::set<uint32_t>>, 98 MethodReferenceComparator> MethodRefToStringInitRegMap; 99 100// Not all combinations of flags are valid. You may not visit all roots as well as the new roots 101// (no logical reason to do this). You also may not start logging new roots and stop logging new 102// roots (also no logical reason to do this). 103enum VisitRootFlags : uint8_t { 104 kVisitRootFlagAllRoots = 0x1, 105 kVisitRootFlagNewRoots = 0x2, 106 kVisitRootFlagStartLoggingNewRoots = 0x4, 107 kVisitRootFlagStopLoggingNewRoots = 0x8, 108 kVisitRootFlagClearRootLog = 0x10, 109 // Non moving means we can have optimizations where we don't visit some roots if they are 110 // definitely reachable from another location. E.g. ArtMethod and ArtField roots. 111 kVisitRootFlagNonMoving = 0x20, 112}; 113 114class Runtime { 115 public: 116 // Parse raw runtime options. 117 static bool ParseOptions(const RuntimeOptions& raw_options, 118 bool ignore_unrecognized, 119 RuntimeArgumentMap* runtime_options); 120 121 // Creates and initializes a new runtime. 122 static bool Create(RuntimeArgumentMap&& runtime_options) 123 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 124 125 // Creates and initializes a new runtime. 126 static bool Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) 127 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 128 129 // IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently. 130 bool IsAotCompiler() const { 131 return !UseJit() && IsCompiler(); 132 } 133 134 // IsCompiler is any runtime which has a running compiler, either dex2oat or JIT. 135 bool IsCompiler() const { 136 return compiler_callbacks_ != nullptr; 137 } 138 139 // If a compiler, are we compiling a boot image? 140 bool IsCompilingBootImage() const; 141 142 bool CanRelocate() const; 143 144 bool ShouldRelocate() const { 145 return must_relocate_ && CanRelocate(); 146 } 147 148 bool MustRelocateIfPossible() const { 149 return must_relocate_; 150 } 151 152 bool IsDex2OatEnabled() const { 153 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 154 } 155 156 bool IsImageDex2OatEnabled() const { 157 return image_dex2oat_enabled_; 158 } 159 160 CompilerCallbacks* GetCompilerCallbacks() { 161 return compiler_callbacks_; 162 } 163 164 void SetCompilerCallbacks(CompilerCallbacks* callbacks) { 165 CHECK(callbacks != nullptr); 166 compiler_callbacks_ = callbacks; 167 } 168 169 bool IsZygote() const { 170 return is_zygote_; 171 } 172 173 bool IsExplicitGcDisabled() const { 174 return is_explicit_gc_disabled_; 175 } 176 177 std::string GetCompilerExecutable() const; 178 std::string GetPatchoatExecutable() const; 179 180 const std::vector<std::string>& GetCompilerOptions() const { 181 return compiler_options_; 182 } 183 184 void AddCompilerOption(std::string option) { 185 compiler_options_.push_back(option); 186 } 187 188 const std::vector<std::string>& GetImageCompilerOptions() const { 189 return image_compiler_options_; 190 } 191 192 const std::string& GetImageLocation() const { 193 return image_location_; 194 } 195 196 const ProfilerOptions& GetProfilerOptions() const { 197 return profiler_options_; 198 } 199 200 // Starts a runtime, which may cause threads to be started and code to run. 201 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 202 203 bool IsShuttingDown(Thread* self); 204 bool IsShuttingDownLocked() const REQUIRES(Locks::runtime_shutdown_lock_) { 205 return shutting_down_; 206 } 207 208 size_t NumberOfThreadsBeingBorn() const REQUIRES(Locks::runtime_shutdown_lock_) { 209 return threads_being_born_; 210 } 211 212 void StartThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 213 threads_being_born_++; 214 } 215 216 void EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_); 217 218 bool IsStarted() const { 219 return started_; 220 } 221 222 bool IsFinishedStarting() const { 223 return finished_starting_; 224 } 225 226 static Runtime* Current() { 227 return instance_; 228 } 229 230 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 231 // callers should prefer. 232 NO_RETURN static void Abort() REQUIRES(!Locks::abort_lock_); 233 234 // Returns the "main" ThreadGroup, used when attaching user threads. 235 jobject GetMainThreadGroup() const; 236 237 // Returns the "system" ThreadGroup, used when attaching our internal threads. 238 jobject GetSystemThreadGroup() const; 239 240 // Returns the system ClassLoader which represents the CLASSPATH. 241 jobject GetSystemClassLoader() const; 242 243 // Attaches the calling native thread to the runtime. 244 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 245 bool create_peer); 246 247 void CallExitHook(jint status); 248 249 // Detaches the current native thread from the runtime. 250 void DetachCurrentThread() REQUIRES(!Locks::mutator_lock_); 251 252 void DumpForSigQuit(std::ostream& os); 253 void DumpLockHolders(std::ostream& os); 254 255 ~Runtime(); 256 257 const std::string& GetBootClassPathString() const { 258 return boot_class_path_string_; 259 } 260 261 const std::string& GetClassPathString() const { 262 return class_path_string_; 263 } 264 265 ClassLinker* GetClassLinker() const { 266 return class_linker_; 267 } 268 269 size_t GetDefaultStackSize() const { 270 return default_stack_size_; 271 } 272 273 gc::Heap* GetHeap() const { 274 return heap_; 275 } 276 277 InternTable* GetInternTable() const { 278 DCHECK(intern_table_ != nullptr); 279 return intern_table_; 280 } 281 282 JavaVMExt* GetJavaVM() const { 283 return java_vm_; 284 } 285 286 size_t GetMaxSpinsBeforeThinkLockInflation() const { 287 return max_spins_before_thin_lock_inflation_; 288 } 289 290 MonitorList* GetMonitorList() const { 291 return monitor_list_; 292 } 293 294 MonitorPool* GetMonitorPool() const { 295 return monitor_pool_; 296 } 297 298 // Is the given object the special object used to mark a cleared JNI weak global? 299 bool IsClearedJniWeakGlobal(mirror::Object* obj) SHARED_REQUIRES(Locks::mutator_lock_); 300 301 // Get the special object used to mark a cleared JNI weak global. 302 mirror::Object* GetClearedJniWeakGlobal() SHARED_REQUIRES(Locks::mutator_lock_); 303 304 mirror::Throwable* GetPreAllocatedOutOfMemoryError() SHARED_REQUIRES(Locks::mutator_lock_); 305 306 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 307 SHARED_REQUIRES(Locks::mutator_lock_); 308 309 const std::vector<std::string>& GetProperties() const { 310 return properties_; 311 } 312 313 ThreadList* GetThreadList() const { 314 return thread_list_; 315 } 316 317 static const char* GetVersion() { 318 return "2.1.0"; 319 } 320 321 void DisallowNewSystemWeaks() SHARED_REQUIRES(Locks::mutator_lock_); 322 void AllowNewSystemWeaks() SHARED_REQUIRES(Locks::mutator_lock_); 323 void BroadcastForNewSystemWeaks() SHARED_REQUIRES(Locks::mutator_lock_); 324 325 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 326 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 327 void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots) 328 SHARED_REQUIRES(Locks::mutator_lock_); 329 330 // Visit image roots, only used for hprof since the GC uses the image space mod union table 331 // instead. 332 void VisitImageRoots(RootVisitor* visitor) SHARED_REQUIRES(Locks::mutator_lock_); 333 334 // Visit all of the roots we can do safely do concurrently. 335 void VisitConcurrentRoots(RootVisitor* visitor, 336 VisitRootFlags flags = kVisitRootFlagAllRoots) 337 SHARED_REQUIRES(Locks::mutator_lock_); 338 339 // Visit all of the non thread roots, we can do this with mutators unpaused. 340 void VisitNonThreadRoots(RootVisitor* visitor) 341 SHARED_REQUIRES(Locks::mutator_lock_); 342 343 void VisitTransactionRoots(RootVisitor* visitor) 344 SHARED_REQUIRES(Locks::mutator_lock_); 345 346 // Visit all of the thread roots. 347 void VisitThreadRoots(RootVisitor* visitor) SHARED_REQUIRES(Locks::mutator_lock_); 348 349 // Flip thread roots from from-space refs to to-space refs. 350 size_t FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 351 gc::collector::GarbageCollector* collector) 352 REQUIRES(!Locks::mutator_lock_); 353 354 // Visit all other roots which must be done with mutators suspended. 355 void VisitNonConcurrentRoots(RootVisitor* visitor) 356 SHARED_REQUIRES(Locks::mutator_lock_); 357 358 // Sweep system weaks, the system weak is deleted if the visitor return null. Otherwise, the 359 // system weak is updated to be the visitor's returned value. 360 void SweepSystemWeaks(IsMarkedVisitor* visitor) 361 SHARED_REQUIRES(Locks::mutator_lock_); 362 363 // Constant roots are the roots which never change after the runtime is initialized, they only 364 // need to be visited once per GC cycle. 365 void VisitConstantRoots(RootVisitor* visitor) 366 SHARED_REQUIRES(Locks::mutator_lock_); 367 368 // Returns a special method that calls into a trampoline for runtime method resolution 369 ArtMethod* GetResolutionMethod(); 370 371 bool HasResolutionMethod() const { 372 return resolution_method_ != nullptr; 373 } 374 375 void SetResolutionMethod(ArtMethod* method) SHARED_REQUIRES(Locks::mutator_lock_); 376 377 ArtMethod* CreateResolutionMethod() SHARED_REQUIRES(Locks::mutator_lock_); 378 379 // Returns a special method that calls into a trampoline for runtime imt conflicts. 380 ArtMethod* GetImtConflictMethod(); 381 ArtMethod* GetImtUnimplementedMethod(); 382 383 bool HasImtConflictMethod() const { 384 return imt_conflict_method_ != nullptr; 385 } 386 387 void SetImtConflictMethod(ArtMethod* method) SHARED_REQUIRES(Locks::mutator_lock_); 388 void SetImtUnimplementedMethod(ArtMethod* method) SHARED_REQUIRES(Locks::mutator_lock_); 389 390 ArtMethod* CreateImtConflictMethod() SHARED_REQUIRES(Locks::mutator_lock_); 391 392 // Returns a special method that describes all callee saves being spilled to the stack. 393 enum CalleeSaveType { 394 kSaveAll, 395 kRefsOnly, 396 kRefsAndArgs, 397 kLastCalleeSaveType // Value used for iteration 398 }; 399 400 bool HasCalleeSaveMethod(CalleeSaveType type) const { 401 return callee_save_methods_[type] != 0u; 402 } 403 404 ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 405 SHARED_REQUIRES(Locks::mutator_lock_); 406 407 ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 408 SHARED_REQUIRES(Locks::mutator_lock_); 409 410 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 411 return callee_save_method_frame_infos_[type]; 412 } 413 414 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method) 415 SHARED_REQUIRES(Locks::mutator_lock_); 416 417 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 418 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[type]); 419 } 420 421 InstructionSet GetInstructionSet() const { 422 return instruction_set_; 423 } 424 425 void SetInstructionSet(InstructionSet instruction_set); 426 427 void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type); 428 429 ArtMethod* CreateCalleeSaveMethod() SHARED_REQUIRES(Locks::mutator_lock_); 430 431 int32_t GetStat(int kind); 432 433 RuntimeStats* GetStats() { 434 return &stats_; 435 } 436 437 bool HasStatsEnabled() const { 438 return stats_enabled_; 439 } 440 441 void ResetStats(int kinds); 442 443 void SetStatsEnabled(bool new_state) 444 REQUIRES(!Locks::instrument_entrypoints_lock_, !Locks::mutator_lock_); 445 446 enum class NativeBridgeAction { // private 447 kUnload, 448 kInitialize 449 }; 450 451 jit::Jit* GetJit() { 452 return jit_.get(); 453 } 454 bool UseJit() const { 455 return jit_.get() != nullptr; 456 } 457 458 void PreZygoteFork(); 459 bool InitZygote(); 460 void InitNonZygoteOrPostFork( 461 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa); 462 463 const instrumentation::Instrumentation* GetInstrumentation() const { 464 return &instrumentation_; 465 } 466 467 instrumentation::Instrumentation* GetInstrumentation() { 468 return &instrumentation_; 469 } 470 471 void RegisterAppInfo(const std::vector<std::string>& code_paths, 472 const std::string& profile_output_filename); 473 474 // Transaction support. 475 bool IsActiveTransaction() const { 476 return preinitialization_transaction_ != nullptr; 477 } 478 void EnterTransactionMode(Transaction* transaction); 479 void ExitTransactionMode(); 480 bool IsTransactionAborted() const; 481 482 void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) 483 SHARED_REQUIRES(Locks::mutator_lock_); 484 void ThrowTransactionAbortError(Thread* self) 485 SHARED_REQUIRES(Locks::mutator_lock_); 486 487 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 488 bool is_volatile) const; 489 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 490 bool is_volatile) const; 491 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 492 bool is_volatile) const; 493 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 494 bool is_volatile) const; 495 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 496 bool is_volatile) const; 497 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 498 bool is_volatile) const; 499 void RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 500 mirror::Object* value, bool is_volatile) const; 501 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 502 SHARED_REQUIRES(Locks::mutator_lock_); 503 void RecordStrongStringInsertion(mirror::String* s) const 504 REQUIRES(Locks::intern_table_lock_); 505 void RecordWeakStringInsertion(mirror::String* s) const 506 REQUIRES(Locks::intern_table_lock_); 507 void RecordStrongStringRemoval(mirror::String* s) const 508 REQUIRES(Locks::intern_table_lock_); 509 void RecordWeakStringRemoval(mirror::String* s) const 510 REQUIRES(Locks::intern_table_lock_); 511 512 void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_); 513 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 514 // with the unexpected_signal_lock_. 515 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 516 return fault_message_; 517 } 518 519 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 520 521 bool ExplicitStackOverflowChecks() const { 522 return !implicit_so_checks_; 523 } 524 525 bool IsVerificationEnabled() const; 526 bool IsVerificationSoftFail() const; 527 528 bool IsDexFileFallbackEnabled() const { 529 return allow_dex_file_fallback_; 530 } 531 532 const std::vector<std::string>& GetCpuAbilist() const { 533 return cpu_abilist_; 534 } 535 536 bool IsRunningOnMemoryTool() const { 537 return is_running_on_memory_tool_; 538 } 539 540 void SetTargetSdkVersion(int32_t version) { 541 target_sdk_version_ = version; 542 } 543 544 int32_t GetTargetSdkVersion() const { 545 return target_sdk_version_; 546 } 547 548 uint32_t GetZygoteMaxFailedBoots() const { 549 return zygote_max_failed_boots_; 550 } 551 552 bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) { 553 return (experimental_flags_ & flags) != ExperimentalFlags::kNone; 554 } 555 556 lambda::BoxTable* GetLambdaBoxTable() const { 557 return lambda_box_table_.get(); 558 } 559 560 // Create the JIT and instrumentation and code cache. 561 void CreateJit(); 562 563 ArenaPool* GetArenaPool() { 564 return arena_pool_.get(); 565 } 566 const ArenaPool* GetArenaPool() const { 567 return arena_pool_.get(); 568 } 569 LinearAlloc* GetLinearAlloc() { 570 return linear_alloc_.get(); 571 } 572 573 jit::JitOptions* GetJITOptions() { 574 return jit_options_.get(); 575 } 576 577 MethodRefToStringInitRegMap& GetStringInitMap() { 578 return method_ref_string_init_reg_map_; 579 } 580 581 bool IsDebuggable() const; 582 583 // Returns the build fingerprint, if set. Otherwise an empty string is returned. 584 std::string GetFingerprint() { 585 return fingerprint_; 586 } 587 588 // Called from class linker. 589 void SetSentinel(mirror::Object* sentinel) SHARED_REQUIRES(Locks::mutator_lock_); 590 591 // Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler. 592 LinearAlloc* CreateLinearAlloc(); 593 594 OatFileManager& GetOatFileManager() const { 595 DCHECK(oat_file_manager_ != nullptr); 596 return *oat_file_manager_; 597 } 598 599 double GetHashTableMinLoadFactor() const; 600 double GetHashTableMaxLoadFactor() const; 601 602 void SetSafeMode(bool mode) { 603 safe_mode_ = mode; 604 } 605 606 private: 607 static void InitPlatformSignalHandlers(); 608 609 Runtime(); 610 611 void BlockSignals(); 612 613 bool Init(RuntimeArgumentMap&& runtime_options) 614 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 615 void InitNativeMethods() REQUIRES(!Locks::mutator_lock_); 616 void InitThreadGroups(Thread* self); 617 void RegisterRuntimeNativeMethods(JNIEnv* env); 618 619 void StartDaemonThreads(); 620 void StartSignalCatcher(); 621 622 void MaybeSaveJitProfilingInfo(); 623 624 // A pointer to the active runtime or null. 625 static Runtime* instance_; 626 627 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 628 static constexpr int kProfileForground = 0; 629 static constexpr int kProfileBackground = 1; 630 631 // 64 bit so that we can share the same asm offsets for both 32 and 64 bits. 632 uint64_t callee_save_methods_[kLastCalleeSaveType]; 633 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 634 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 635 ArtMethod* resolution_method_; 636 ArtMethod* imt_conflict_method_; 637 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 638 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 639 ArtMethod* imt_unimplemented_method_; 640 641 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 642 // JDWP (invalid references). 643 GcRoot<mirror::Object> sentinel_; 644 645 InstructionSet instruction_set_; 646 QuickMethodFrameInfo callee_save_method_frame_infos_[kLastCalleeSaveType]; 647 648 CompilerCallbacks* compiler_callbacks_; 649 bool is_zygote_; 650 bool must_relocate_; 651 bool is_concurrent_gc_enabled_; 652 bool is_explicit_gc_disabled_; 653 bool dex2oat_enabled_; 654 bool image_dex2oat_enabled_; 655 656 std::string compiler_executable_; 657 std::string patchoat_executable_; 658 std::vector<std::string> compiler_options_; 659 std::vector<std::string> image_compiler_options_; 660 std::string image_location_; 661 662 std::string boot_class_path_string_; 663 std::string class_path_string_; 664 std::vector<std::string> properties_; 665 666 // The default stack size for managed threads created by the runtime. 667 size_t default_stack_size_; 668 669 gc::Heap* heap_; 670 671 std::unique_ptr<ArenaPool> arena_pool_; 672 // Special low 4gb pool for compiler linear alloc. We need ArtFields to be in low 4gb if we are 673 // compiling using a 32 bit image on a 64 bit compiler in case we resolve things in the image 674 // since the field arrays are int arrays in this case. 675 std::unique_ptr<ArenaPool> low_4gb_arena_pool_; 676 677 // Shared linear alloc for now. 678 std::unique_ptr<LinearAlloc> linear_alloc_; 679 680 // The number of spins that are done before thread suspension is used to forcibly inflate. 681 size_t max_spins_before_thin_lock_inflation_; 682 MonitorList* monitor_list_; 683 MonitorPool* monitor_pool_; 684 685 ThreadList* thread_list_; 686 687 InternTable* intern_table_; 688 689 ClassLinker* class_linker_; 690 691 SignalCatcher* signal_catcher_; 692 std::string stack_trace_file_; 693 694 JavaVMExt* java_vm_; 695 696 std::unique_ptr<jit::Jit> jit_; 697 std::unique_ptr<jit::JitOptions> jit_options_; 698 699 std::unique_ptr<lambda::BoxTable> lambda_box_table_; 700 701 // Fault message, printed when we get a SIGSEGV. 702 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 703 std::string fault_message_ GUARDED_BY(fault_message_lock_); 704 705 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 706 // the shutdown lock so that threads aren't born while we're shutting down. 707 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 708 709 // Waited upon until no threads are being born. 710 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 711 712 // Set when runtime shutdown is past the point that new threads may attach. 713 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 714 715 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 716 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 717 718 bool started_; 719 720 // New flag added which tells us if the runtime has finished starting. If 721 // this flag is set then the Daemon threads are created and the class loader 722 // is created. This flag is needed for knowing if its safe to request CMS. 723 bool finished_starting_; 724 725 // Hooks supported by JNI_CreateJavaVM 726 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 727 void (*exit_)(jint status); 728 void (*abort_)(); 729 730 bool stats_enabled_; 731 RuntimeStats stats_; 732 733 const bool is_running_on_memory_tool_; 734 735 std::string profile_output_filename_; 736 ProfilerOptions profiler_options_; 737 738 std::unique_ptr<TraceConfig> trace_config_; 739 740 instrumentation::Instrumentation instrumentation_; 741 742 jobject main_thread_group_; 743 jobject system_thread_group_; 744 745 // As returned by ClassLoader.getSystemClassLoader(). 746 jobject system_class_loader_; 747 748 // If true, then we dump the GC cumulative timings on shutdown. 749 bool dump_gc_performance_on_shutdown_; 750 751 // Transaction used for pre-initializing classes at compilation time. 752 Transaction* preinitialization_transaction_; 753 754 // If kNone, verification is disabled. kEnable by default. 755 verifier::VerifyMode verify_; 756 757 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 758 // available/usable. 759 bool allow_dex_file_fallback_; 760 761 // List of supported cpu abis. 762 std::vector<std::string> cpu_abilist_; 763 764 // Specifies target SDK version to allow workarounds for certain API levels. 765 int32_t target_sdk_version_; 766 767 // Implicit checks flags. 768 bool implicit_null_checks_; // NullPointer checks are implicit. 769 bool implicit_so_checks_; // StackOverflow checks are implicit. 770 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 771 772 // Whether or not the sig chain (and implicitly the fault handler) should be 773 // disabled. Tools like dex2oat or patchoat don't need them. This enables 774 // building a statically link version of dex2oat. 775 bool no_sig_chain_; 776 777 // Force the use of native bridge even if the app ISA matches the runtime ISA. 778 bool force_native_bridge_; 779 780 // Whether or not a native bridge has been loaded. 781 // 782 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 783 // if standard dlopen fails to load native library associated with native activity, it calls to 784 // the native bridge to load it and then gets the trampoline for the entry to native activity. 785 // 786 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 787 // When non-empty the native bridge will be loaded from the given file. An empty value means 788 // that there's no native bridge. 789 bool is_native_bridge_loaded_; 790 791 // The maximum number of failed boots we allow before pruning the dalvik cache 792 // and trying again. This option is only inspected when we're running as a 793 // zygote. 794 uint32_t zygote_max_failed_boots_; 795 796 // Enable experimental opcodes that aren't fully specified yet. The intent is to 797 // eventually publish them as public-usable opcodes, but they aren't ready yet. 798 // 799 // Experimental opcodes should not be used by other production code. 800 ExperimentalFlags experimental_flags_; 801 802 MethodRefToStringInitRegMap method_ref_string_init_reg_map_; 803 804 // Contains the build fingerprint, if given as a parameter. 805 std::string fingerprint_; 806 807 // Oat file manager, keeps track of what oat files are open. 808 OatFileManager* oat_file_manager_; 809 810 // Whether or not we are on a low RAM device. 811 bool is_low_memory_mode_; 812 813 // Whether the application should run in safe mode, that is, interpreter only. 814 bool safe_mode_; 815 816 DISALLOW_COPY_AND_ASSIGN(Runtime); 817}; 818std::ostream& operator<<(std::ostream& os, const Runtime::CalleeSaveType& rhs); 819 820} // namespace art 821 822#endif // ART_RUNTIME_RUNTIME_H_ 823