runtime.h revision f6a780abeaed4bf745720e8f836a3064d3ffbec4
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 "gc_root.h" 32#include "instrumentation.h" 33#include "jobject_comparator.h" 34#include "object_callbacks.h" 35#include "offsets.h" 36#include "profiler_options.h" 37#include "quick/quick_method_frame_info.h" 38#include "runtime_stats.h" 39#include "safe_map.h" 40 41namespace art { 42 43class ArenaPool; 44class CompilerCallbacks; 45 46namespace gc { 47 class Heap; 48 namespace collector { 49 class GarbageCollector; 50 } // namespace collector 51} // namespace gc 52 53namespace jit { 54 class Jit; 55 class JitOptions; 56} // namespace jit 57 58namespace mirror { 59 class ArtMethod; 60 class ClassLoader; 61 class Array; 62 template<class T> class ObjectArray; 63 template<class T> class PrimitiveArray; 64 typedef PrimitiveArray<int8_t> ByteArray; 65 class String; 66 class Throwable; 67} // namespace mirror 68namespace verifier { 69 class MethodVerifier; 70} // namespace verifier 71class ClassLinker; 72class Closure; 73class DexFile; 74class InternTable; 75class JavaVMExt; 76class MonitorList; 77class MonitorPool; 78class NullPointerHandler; 79class SignalCatcher; 80class StackOverflowHandler; 81class SuspensionHandler; 82class ThreadList; 83class Trace; 84struct TraceConfig; 85class Transaction; 86 87typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 88 89// Not all combinations of flags are valid. You may not visit all roots as well as the new roots 90// (no logical reason to do this). You also may not start logging new roots and stop logging new 91// roots (also no logical reason to do this). 92enum VisitRootFlags : uint8_t { 93 kVisitRootFlagAllRoots = 0x1, 94 kVisitRootFlagNewRoots = 0x2, 95 kVisitRootFlagStartLoggingNewRoots = 0x4, 96 kVisitRootFlagStopLoggingNewRoots = 0x8, 97 kVisitRootFlagClearRootLog = 0x10, 98}; 99 100class Runtime { 101 public: 102 // Creates and initializes a new runtime. 103 static bool Create(const RuntimeOptions& options, bool ignore_unrecognized) 104 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 105 106 // IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently. 107 bool IsAotCompiler() const { 108 return !UseJit() && IsCompiler(); 109 } 110 111 // IsCompiler is any runtime which has a running compiler, either dex2oat or JIT. 112 bool IsCompiler() const { 113 return compiler_callbacks_ != nullptr; 114 } 115 116 // If a compiler, are we compiling a boot image? 117 bool IsCompilingBootImage() const; 118 119 bool CanRelocate() const; 120 121 bool ShouldRelocate() const { 122 return must_relocate_ && CanRelocate(); 123 } 124 125 bool MustRelocateIfPossible() const { 126 return must_relocate_; 127 } 128 129 bool IsDex2OatEnabled() const { 130 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 131 } 132 133 bool IsImageDex2OatEnabled() const { 134 return image_dex2oat_enabled_; 135 } 136 137 CompilerCallbacks* GetCompilerCallbacks() { 138 return compiler_callbacks_; 139 } 140 141 bool IsZygote() const { 142 return is_zygote_; 143 } 144 145 bool IsExplicitGcDisabled() const { 146 return is_explicit_gc_disabled_; 147 } 148 149 std::string GetCompilerExecutable() const; 150 std::string GetPatchoatExecutable() const; 151 152 const std::vector<std::string>& GetCompilerOptions() const { 153 return compiler_options_; 154 } 155 156 void AddCompilerOption(std::string option) { 157 compiler_options_.push_back(option); 158 } 159 160 const std::vector<std::string>& GetImageCompilerOptions() const { 161 return image_compiler_options_; 162 } 163 164 const std::string& GetImageLocation() const { 165 return image_location_; 166 } 167 168 const ProfilerOptions& GetProfilerOptions() const { 169 return profiler_options_; 170 } 171 172 // Starts a runtime, which may cause threads to be started and code to run. 173 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 174 175 bool IsShuttingDown(Thread* self); 176 bool IsShuttingDownLocked() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 177 return shutting_down_; 178 } 179 180 size_t NumberOfThreadsBeingBorn() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 181 return threads_being_born_; 182 } 183 184 void StartThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 185 threads_being_born_++; 186 } 187 188 void EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_); 189 190 bool IsStarted() const { 191 return started_; 192 } 193 194 bool IsFinishedStarting() const { 195 return finished_starting_; 196 } 197 198 static Runtime* Current() { 199 return instance_; 200 } 201 202 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 203 // callers should prefer. 204 NO_RETURN static void Abort() LOCKS_EXCLUDED(Locks::abort_lock_); 205 206 // Returns the "main" ThreadGroup, used when attaching user threads. 207 jobject GetMainThreadGroup() const; 208 209 // Returns the "system" ThreadGroup, used when attaching our internal threads. 210 jobject GetSystemThreadGroup() const; 211 212 // Returns the system ClassLoader which represents the CLASSPATH. 213 jobject GetSystemClassLoader() const; 214 215 // Attaches the calling native thread to the runtime. 216 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 217 bool create_peer); 218 219 void CallExitHook(jint status); 220 221 // Detaches the current native thread from the runtime. 222 void DetachCurrentThread() LOCKS_EXCLUDED(Locks::mutator_lock_); 223 224 void DumpForSigQuit(std::ostream& os); 225 void DumpLockHolders(std::ostream& os); 226 227 ~Runtime(); 228 229 const std::string& GetBootClassPathString() const { 230 return boot_class_path_string_; 231 } 232 233 const std::string& GetClassPathString() const { 234 return class_path_string_; 235 } 236 237 ClassLinker* GetClassLinker() const { 238 return class_linker_; 239 } 240 241 size_t GetDefaultStackSize() const { 242 return default_stack_size_; 243 } 244 245 gc::Heap* GetHeap() const { 246 return heap_; 247 } 248 249 InternTable* GetInternTable() const { 250 DCHECK(intern_table_ != NULL); 251 return intern_table_; 252 } 253 254 JavaVMExt* GetJavaVM() const { 255 return java_vm_; 256 } 257 258 size_t GetMaxSpinsBeforeThinkLockInflation() const { 259 return max_spins_before_thin_lock_inflation_; 260 } 261 262 MonitorList* GetMonitorList() const { 263 return monitor_list_; 264 } 265 266 MonitorPool* GetMonitorPool() const { 267 return monitor_pool_; 268 } 269 270 // Is the given object the special object used to mark a cleared JNI weak global? 271 bool IsClearedJniWeakGlobal(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 272 273 // Get the special object used to mark a cleared JNI weak global. 274 mirror::Object* GetClearedJniWeakGlobal() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 275 276 mirror::Throwable* GetPreAllocatedOutOfMemoryError() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 277 278 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 279 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 280 281 const std::vector<std::string>& GetProperties() const { 282 return properties_; 283 } 284 285 ThreadList* GetThreadList() const { 286 return thread_list_; 287 } 288 289 static const char* GetVersion() { 290 return "2.1.0"; 291 } 292 293 void DisallowNewSystemWeaks() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 294 void AllowNewSystemWeaks() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 295 void EnsureNewSystemWeaksDisallowed() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 296 297 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 298 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 299 void VisitRoots(RootCallback* visitor, void* arg, VisitRootFlags flags = kVisitRootFlagAllRoots) 300 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 301 302 // Visit image roots, only used for hprof since the GC uses the image space mod union table 303 // instead. 304 void VisitImageRoots(RootCallback* visitor, void* arg) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 305 306 // Visit all of the roots we can do safely do concurrently. 307 void VisitConcurrentRoots(RootCallback* visitor, void* arg, 308 VisitRootFlags flags = kVisitRootFlagAllRoots) 309 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 310 311 // Visit all of the non thread roots, we can do this with mutators unpaused. 312 void VisitNonThreadRoots(RootCallback* visitor, void* arg) 313 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 314 315 void VisitTransactionRoots(RootCallback* visitor, void* arg) 316 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 317 318 // Visit all of the thread roots. 319 void VisitThreadRoots(RootCallback* visitor, void* arg) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 320 321 // Flip thread roots from from-space refs to to-space refs. 322 size_t FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 323 gc::collector::GarbageCollector* collector) 324 LOCKS_EXCLUDED(Locks::mutator_lock_); 325 326 // Visit all other roots which must be done with mutators suspended. 327 void VisitNonConcurrentRoots(RootCallback* visitor, void* arg) 328 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 329 330 // Sweep system weaks, the system weak is deleted if the visitor return nullptr. Otherwise, the 331 // system weak is updated to be the visitor's returned value. 332 void SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) 333 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 334 335 // Constant roots are the roots which never change after the runtime is initialized, they only 336 // need to be visited once per GC cycle. 337 void VisitConstantRoots(RootCallback* callback, void* arg) 338 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 339 340 // Returns a special method that calls into a trampoline for runtime method resolution 341 mirror::ArtMethod* GetResolutionMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 342 343 bool HasResolutionMethod() const { 344 return !resolution_method_.IsNull(); 345 } 346 347 void SetResolutionMethod(mirror::ArtMethod* method) { 348 resolution_method_ = GcRoot<mirror::ArtMethod>(method); 349 } 350 351 mirror::ArtMethod* CreateResolutionMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 352 353 // Returns a special method that calls into a trampoline for runtime imt conflicts. 354 mirror::ArtMethod* GetImtConflictMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 355 mirror::ArtMethod* GetImtUnimplementedMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 356 357 bool HasImtConflictMethod() const { 358 return !imt_conflict_method_.IsNull(); 359 } 360 361 void SetImtConflictMethod(mirror::ArtMethod* method); 362 void SetImtUnimplementedMethod(mirror::ArtMethod* method) { 363 imt_unimplemented_method_ = GcRoot<mirror::ArtMethod>(method); 364 } 365 366 mirror::ArtMethod* CreateImtConflictMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 367 368 // Returns an imt with every entry set to conflict, used as default imt for all classes. 369 mirror::ObjectArray<mirror::ArtMethod>* GetDefaultImt() 370 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 371 372 bool HasDefaultImt() const { 373 return !default_imt_.IsNull(); 374 } 375 376 void SetDefaultImt(mirror::ObjectArray<mirror::ArtMethod>* imt) { 377 default_imt_ = GcRoot<mirror::ObjectArray<mirror::ArtMethod>>(imt); 378 } 379 380 mirror::ObjectArray<mirror::ArtMethod>* CreateDefaultImt(ClassLinker* cl) 381 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 382 383 // Returns a special method that describes all callee saves being spilled to the stack. 384 enum CalleeSaveType { 385 kSaveAll, 386 kRefsOnly, 387 kRefsAndArgs, 388 kLastCalleeSaveType // Value used for iteration 389 }; 390 391 bool HasCalleeSaveMethod(CalleeSaveType type) const { 392 return !callee_save_methods_[type].IsNull(); 393 } 394 395 mirror::ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 396 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 397 398 mirror::ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 399 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 400 401 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 402 return callee_save_method_frame_infos_[type]; 403 } 404 405 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(mirror::ArtMethod* method) 406 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 407 408 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 409 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[type]); 410 } 411 412 InstructionSet GetInstructionSet() const { 413 return instruction_set_; 414 } 415 416 void SetInstructionSet(InstructionSet instruction_set); 417 418 void SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type); 419 420 mirror::ArtMethod* CreateCalleeSaveMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 421 422 int32_t GetStat(int kind); 423 424 RuntimeStats* GetStats() { 425 return &stats_; 426 } 427 428 bool HasStatsEnabled() const { 429 return stats_enabled_; 430 } 431 432 void ResetStats(int kinds); 433 434 void SetStatsEnabled(bool new_state) LOCKS_EXCLUDED(Locks::instrument_entrypoints_lock_, 435 Locks::mutator_lock_); 436 437 enum class NativeBridgeAction { // private 438 kUnload, 439 kInitialize 440 }; 441 442 jit::Jit* GetJit() { 443 return jit_.get(); 444 } 445 bool UseJit() const { 446 return jit_.get() != nullptr; 447 } 448 449 void PreZygoteFork(); 450 bool InitZygote(); 451 void DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa); 452 453 const instrumentation::Instrumentation* GetInstrumentation() const { 454 return &instrumentation_; 455 } 456 457 instrumentation::Instrumentation* GetInstrumentation() { 458 return &instrumentation_; 459 } 460 461 void StartProfiler(const char* profile_output_filename); 462 void UpdateProfilerState(int state); 463 464 // Transaction support. 465 bool IsActiveTransaction() const { 466 return preinitialization_transaction_ != nullptr; 467 } 468 void EnterTransactionMode(Transaction* transaction); 469 void ExitTransactionMode(); 470 bool IsTransactionAborted() const; 471 472 void AbortTransactionAndThrowInternalError(Thread* self, const std::string& abort_message) 473 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 474 void ThrowInternalErrorForAbortedTransaction(Thread* self) 475 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 476 477 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 478 bool is_volatile) const; 479 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 480 bool is_volatile) const; 481 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 482 bool is_volatile) const; 483 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 484 bool is_volatile) const; 485 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 486 bool is_volatile) const; 487 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 488 bool is_volatile) const; 489 void RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 490 mirror::Object* value, bool is_volatile) const; 491 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 492 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 493 void RecordStrongStringInsertion(mirror::String* s) const 494 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 495 void RecordWeakStringInsertion(mirror::String* s) const 496 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 497 void RecordStrongStringRemoval(mirror::String* s) const 498 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 499 void RecordWeakStringRemoval(mirror::String* s) const 500 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 501 502 void SetFaultMessage(const std::string& message); 503 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 504 // with the unexpected_signal_lock_. 505 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 506 return fault_message_; 507 } 508 509 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 510 511 bool ExplicitStackOverflowChecks() const { 512 return !implicit_so_checks_; 513 } 514 515 bool IsVerificationEnabled() const { 516 return verify_; 517 } 518 519 bool IsDexFileFallbackEnabled() const { 520 return allow_dex_file_fallback_; 521 } 522 523 const std::vector<std::string>& GetCpuAbilist() const { 524 return cpu_abilist_; 525 } 526 527 bool RunningOnValgrind() const { 528 return running_on_valgrind_; 529 } 530 531 void SetTargetSdkVersion(int32_t version) { 532 target_sdk_version_ = version; 533 } 534 535 int32_t GetTargetSdkVersion() const { 536 return target_sdk_version_; 537 } 538 539 uint32_t GetZygoteMaxFailedBoots() const { 540 return zygote_max_failed_boots_; 541 } 542 543 // Create the JIT and instrumentation and code cache. 544 void CreateJit(); 545 546 ArenaPool* GetArenaPool() { 547 return arena_pool_.get(); 548 } 549 const ArenaPool* GetArenaPool() const { 550 return arena_pool_.get(); 551 } 552 553 jit::JitOptions* GetJITOptions() { 554 return jit_options_.get(); 555 } 556 557 private: 558 static void InitPlatformSignalHandlers(); 559 560 Runtime(); 561 562 void BlockSignals(); 563 564 bool Init(const RuntimeOptions& options, bool ignore_unrecognized) 565 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 566 void InitNativeMethods() LOCKS_EXCLUDED(Locks::mutator_lock_); 567 void InitThreadGroups(Thread* self); 568 void RegisterRuntimeNativeMethods(JNIEnv* env); 569 570 void StartDaemonThreads(); 571 void StartSignalCatcher(); 572 573 // A pointer to the active runtime or NULL. 574 static Runtime* instance_; 575 576 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 577 static constexpr int kProfileForground = 0; 578 static constexpr int kProfileBackgrouud = 1; 579 580 GcRoot<mirror::ArtMethod> callee_save_methods_[kLastCalleeSaveType]; 581 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 582 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 583 GcRoot<mirror::ArtMethod> resolution_method_; 584 GcRoot<mirror::ArtMethod> imt_conflict_method_; 585 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 586 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 587 GcRoot<mirror::ArtMethod> imt_unimplemented_method_; 588 GcRoot<mirror::ObjectArray<mirror::ArtMethod>> default_imt_; 589 590 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 591 // JDWP (invalid references). 592 GcRoot<mirror::Object> sentinel_; 593 594 InstructionSet instruction_set_; 595 QuickMethodFrameInfo callee_save_method_frame_infos_[kLastCalleeSaveType]; 596 597 CompilerCallbacks* compiler_callbacks_; 598 bool is_zygote_; 599 bool must_relocate_; 600 bool is_concurrent_gc_enabled_; 601 bool is_explicit_gc_disabled_; 602 bool dex2oat_enabled_; 603 bool image_dex2oat_enabled_; 604 605 std::string compiler_executable_; 606 std::string patchoat_executable_; 607 std::vector<std::string> compiler_options_; 608 std::vector<std::string> image_compiler_options_; 609 std::string image_location_; 610 611 std::string boot_class_path_string_; 612 std::string class_path_string_; 613 std::vector<std::string> properties_; 614 615 // The default stack size for managed threads created by the runtime. 616 size_t default_stack_size_; 617 618 gc::Heap* heap_; 619 620 std::unique_ptr<ArenaPool> arena_pool_; 621 622 // The number of spins that are done before thread suspension is used to forcibly inflate. 623 size_t max_spins_before_thin_lock_inflation_; 624 MonitorList* monitor_list_; 625 MonitorPool* monitor_pool_; 626 627 ThreadList* thread_list_; 628 629 InternTable* intern_table_; 630 631 ClassLinker* class_linker_; 632 633 SignalCatcher* signal_catcher_; 634 std::string stack_trace_file_; 635 636 JavaVMExt* java_vm_; 637 638 std::unique_ptr<jit::Jit> jit_; 639 std::unique_ptr<jit::JitOptions> jit_options_; 640 641 // Fault message, printed when we get a SIGSEGV. 642 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 643 std::string fault_message_ GUARDED_BY(fault_message_lock_); 644 645 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 646 // the shutdown lock so that threads aren't born while we're shutting down. 647 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 648 649 // Waited upon until no threads are being born. 650 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 651 652 // Set when runtime shutdown is past the point that new threads may attach. 653 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 654 655 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 656 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 657 658 bool started_; 659 660 // New flag added which tells us if the runtime has finished starting. If 661 // this flag is set then the Daemon threads are created and the class loader 662 // is created. This flag is needed for knowing if its safe to request CMS. 663 bool finished_starting_; 664 665 // Hooks supported by JNI_CreateJavaVM 666 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 667 void (*exit_)(jint status); 668 void (*abort_)(); 669 670 bool stats_enabled_; 671 RuntimeStats stats_; 672 673 const bool running_on_valgrind_; 674 675 std::string profile_output_filename_; 676 ProfilerOptions profiler_options_; 677 bool profiler_started_; 678 679 std::unique_ptr<TraceConfig> trace_config_; 680 681 instrumentation::Instrumentation instrumentation_; 682 683 jobject main_thread_group_; 684 jobject system_thread_group_; 685 686 // As returned by ClassLoader.getSystemClassLoader(). 687 jobject system_class_loader_; 688 689 // If true, then we dump the GC cumulative timings on shutdown. 690 bool dump_gc_performance_on_shutdown_; 691 692 // Transaction used for pre-initializing classes at compilation time. 693 Transaction* preinitialization_transaction_; 694 695 // If false, verification is disabled. True by default. 696 bool verify_; 697 698 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 699 // available/usable. 700 bool allow_dex_file_fallback_; 701 702 // List of supported cpu abis. 703 std::vector<std::string> cpu_abilist_; 704 705 // Specifies target SDK version to allow workarounds for certain API levels. 706 int32_t target_sdk_version_; 707 708 // Implicit checks flags. 709 bool implicit_null_checks_; // NullPointer checks are implicit. 710 bool implicit_so_checks_; // StackOverflow checks are implicit. 711 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 712 713 // Whether or not a native bridge has been loaded. 714 // 715 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 716 // if standard dlopen fails to load native library associated with native activity, it calls to 717 // the native bridge to load it and then gets the trampoline for the entry to native activity. 718 // 719 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 720 // When non-empty the native bridge will be loaded from the given file. An empty value means 721 // that there's no native bridge. 722 bool is_native_bridge_loaded_; 723 724 // The maximum number of failed boots we allow before pruning the dalvik cache 725 // and trying again. This option is only inspected when we're running as a 726 // zygote. 727 uint32_t zygote_max_failed_boots_; 728 729 DISALLOW_COPY_AND_ASSIGN(Runtime); 730}; 731std::ostream& operator<<(std::ostream& os, const Runtime::CalleeSaveType& rhs); 732 733} // namespace art 734 735#endif // ART_RUNTIME_RUNTIME_H_ 736