runtime.h revision da0a69edb24122d3d35ce1483c5ab94de919d714
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 "obj_ptr.h" 37#include "object_callbacks.h" 38#include "offsets.h" 39#include "process_state.h" 40#include "quick/quick_method_frame_info.h" 41#include "runtime_stats.h" 42#include "safe_map.h" 43 44namespace art { 45 46namespace gc { 47 class AbstractSystemWeakHolder; 48 class Heap; 49 namespace collector { 50 class GarbageCollector; 51 } // namespace collector 52} // namespace gc 53 54namespace jit { 55 class Jit; 56 class JitOptions; 57} // namespace jit 58 59namespace mirror { 60 class Array; 61 class ClassLoader; 62 class DexCache; 63 template<class T> class ObjectArray; 64 template<class T> class PrimitiveArray; 65 typedef PrimitiveArray<int8_t> ByteArray; 66 class String; 67 class Throwable; 68} // namespace mirror 69namespace ti { 70 class Agent; 71} // namespace ti 72namespace verifier { 73 class MethodVerifier; 74 enum class VerifyMode : int8_t; 75} // namespace verifier 76class ArenaPool; 77class ArtMethod; 78class ClassLinker; 79class Closure; 80class CompilerCallbacks; 81class DexFile; 82class InternTable; 83class JavaVMExt; 84class LinearAlloc; 85class MonitorList; 86class MonitorPool; 87class NullPointerHandler; 88class OatFileManager; 89class Plugin; 90struct RuntimeArgumentMap; 91class SignalCatcher; 92class StackOverflowHandler; 93class SuspensionHandler; 94class ThreadList; 95class Trace; 96struct TraceConfig; 97class Transaction; 98 99typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 100 101// Not all combinations of flags are valid. You may not visit all roots as well as the new roots 102// (no logical reason to do this). You also may not start logging new roots and stop logging new 103// roots (also no logical reason to do this). 104enum VisitRootFlags : uint8_t { 105 kVisitRootFlagAllRoots = 0x1, 106 kVisitRootFlagNewRoots = 0x2, 107 kVisitRootFlagStartLoggingNewRoots = 0x4, 108 kVisitRootFlagStopLoggingNewRoots = 0x8, 109 kVisitRootFlagClearRootLog = 0x10, 110 // Non moving means we can have optimizations where we don't visit some roots if they are 111 // definitely reachable from another location. E.g. ArtMethod and ArtField roots. 112 kVisitRootFlagNonMoving = 0x20, 113}; 114 115class Runtime { 116 public: 117 // Parse raw runtime options. 118 static bool ParseOptions(const RuntimeOptions& raw_options, 119 bool ignore_unrecognized, 120 RuntimeArgumentMap* runtime_options); 121 122 // Creates and initializes a new runtime. 123 static bool Create(RuntimeArgumentMap&& runtime_options) 124 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 125 126 // Creates and initializes a new runtime. 127 static bool Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) 128 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 129 130 // IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently. 131 bool IsAotCompiler() const { 132 return !UseJitCompilation() && IsCompiler(); 133 } 134 135 // IsCompiler is any runtime which has a running compiler, either dex2oat or JIT. 136 bool IsCompiler() const { 137 return compiler_callbacks_ != nullptr; 138 } 139 140 // If a compiler, are we compiling a boot image? 141 bool IsCompilingBootImage() const; 142 143 bool CanRelocate() const; 144 145 bool ShouldRelocate() const { 146 return must_relocate_ && CanRelocate(); 147 } 148 149 bool MustRelocateIfPossible() const { 150 return must_relocate_; 151 } 152 153 bool IsDex2OatEnabled() const { 154 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 155 } 156 157 bool IsImageDex2OatEnabled() const { 158 return image_dex2oat_enabled_; 159 } 160 161 CompilerCallbacks* GetCompilerCallbacks() { 162 return compiler_callbacks_; 163 } 164 165 void SetCompilerCallbacks(CompilerCallbacks* callbacks) { 166 CHECK(callbacks != nullptr); 167 compiler_callbacks_ = callbacks; 168 } 169 170 bool IsZygote() const { 171 return is_zygote_; 172 } 173 174 bool IsExplicitGcDisabled() const { 175 return is_explicit_gc_disabled_; 176 } 177 178 std::string GetCompilerExecutable() const; 179 std::string GetPatchoatExecutable() const; 180 181 const std::vector<std::string>& GetCompilerOptions() const { 182 return compiler_options_; 183 } 184 185 void AddCompilerOption(std::string option) { 186 compiler_options_.push_back(option); 187 } 188 189 const std::vector<std::string>& GetImageCompilerOptions() const { 190 return image_compiler_options_; 191 } 192 193 const std::string& GetImageLocation() const { 194 return image_location_; 195 } 196 197 // Starts a runtime, which may cause threads to be started and code to run. 198 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 199 200 bool IsShuttingDown(Thread* self); 201 bool IsShuttingDownLocked() const REQUIRES(Locks::runtime_shutdown_lock_) { 202 return shutting_down_; 203 } 204 205 size_t NumberOfThreadsBeingBorn() const REQUIRES(Locks::runtime_shutdown_lock_) { 206 return threads_being_born_; 207 } 208 209 void StartThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 210 threads_being_born_++; 211 } 212 213 void EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_); 214 215 bool IsStarted() const { 216 return started_; 217 } 218 219 bool IsFinishedStarting() const { 220 return finished_starting_; 221 } 222 223 static Runtime* Current() { 224 return instance_; 225 } 226 227 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 228 // callers should prefer. 229 NO_RETURN static void Abort(const char* msg) REQUIRES(!Locks::abort_lock_); 230 231 // Returns the "main" ThreadGroup, used when attaching user threads. 232 jobject GetMainThreadGroup() const; 233 234 // Returns the "system" ThreadGroup, used when attaching our internal threads. 235 jobject GetSystemThreadGroup() const; 236 237 // Returns the system ClassLoader which represents the CLASSPATH. 238 jobject GetSystemClassLoader() const; 239 240 // Attaches the calling native thread to the runtime. 241 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 242 bool create_peer); 243 244 void CallExitHook(jint status); 245 246 // Detaches the current native thread from the runtime. 247 void DetachCurrentThread() REQUIRES(!Locks::mutator_lock_); 248 249 void DumpForSigQuit(std::ostream& os); 250 void DumpLockHolders(std::ostream& os); 251 252 ~Runtime(); 253 254 const std::string& GetBootClassPathString() const { 255 return boot_class_path_string_; 256 } 257 258 const std::string& GetClassPathString() const { 259 return class_path_string_; 260 } 261 262 ClassLinker* GetClassLinker() const { 263 return class_linker_; 264 } 265 266 size_t GetDefaultStackSize() const { 267 return default_stack_size_; 268 } 269 270 gc::Heap* GetHeap() const { 271 return heap_; 272 } 273 274 InternTable* GetInternTable() const { 275 DCHECK(intern_table_ != nullptr); 276 return intern_table_; 277 } 278 279 JavaVMExt* GetJavaVM() const { 280 return java_vm_.get(); 281 } 282 283 size_t GetMaxSpinsBeforeThinkLockInflation() const { 284 return max_spins_before_thin_lock_inflation_; 285 } 286 287 MonitorList* GetMonitorList() const { 288 return monitor_list_; 289 } 290 291 MonitorPool* GetMonitorPool() const { 292 return monitor_pool_; 293 } 294 295 // Is the given object the special object used to mark a cleared JNI weak global? 296 bool IsClearedJniWeakGlobal(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 297 298 // Get the special object used to mark a cleared JNI weak global. 299 mirror::Object* GetClearedJniWeakGlobal() REQUIRES_SHARED(Locks::mutator_lock_); 300 301 mirror::Throwable* GetPreAllocatedOutOfMemoryError() REQUIRES_SHARED(Locks::mutator_lock_); 302 303 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 304 REQUIRES_SHARED(Locks::mutator_lock_); 305 306 const std::vector<std::string>& GetProperties() const { 307 return properties_; 308 } 309 310 ThreadList* GetThreadList() const { 311 return thread_list_; 312 } 313 314 static const char* GetVersion() { 315 return "2.1.0"; 316 } 317 318 bool IsMethodHandlesEnabled() const { 319 return experimental_flags_ & ExperimentalFlags::kMethodHandles; 320 } 321 322 void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 323 void AllowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 324 void BroadcastForNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 325 326 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 327 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 328 void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots) 329 REQUIRES_SHARED(Locks::mutator_lock_); 330 331 // Visit image roots, only used for hprof since the GC uses the image space mod union table 332 // instead. 333 void VisitImageRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 334 335 // Visit all of the roots we can do safely do concurrently. 336 void VisitConcurrentRoots(RootVisitor* visitor, 337 VisitRootFlags flags = kVisitRootFlagAllRoots) 338 REQUIRES_SHARED(Locks::mutator_lock_); 339 340 // Visit all of the non thread roots, we can do this with mutators unpaused. 341 void VisitNonThreadRoots(RootVisitor* visitor) 342 REQUIRES_SHARED(Locks::mutator_lock_); 343 344 void VisitTransactionRoots(RootVisitor* visitor) 345 REQUIRES_SHARED(Locks::mutator_lock_); 346 347 // Visit all of the thread roots. 348 void VisitThreadRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 349 350 // Flip thread roots from from-space refs to to-space refs. 351 size_t FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 352 gc::collector::GarbageCollector* collector) 353 REQUIRES(!Locks::mutator_lock_); 354 355 // Visit all other roots which must be done with mutators suspended. 356 void VisitNonConcurrentRoots(RootVisitor* visitor) 357 REQUIRES_SHARED(Locks::mutator_lock_); 358 359 // Sweep system weaks, the system weak is deleted if the visitor return null. Otherwise, the 360 // system weak is updated to be the visitor's returned value. 361 void SweepSystemWeaks(IsMarkedVisitor* visitor) 362 REQUIRES_SHARED(Locks::mutator_lock_); 363 364 // Constant roots are the roots which never change after the runtime is initialized, they only 365 // need to be visited once per GC cycle. 366 void VisitConstantRoots(RootVisitor* visitor) 367 REQUIRES_SHARED(Locks::mutator_lock_); 368 369 // Returns a special method that calls into a trampoline for runtime method resolution 370 ArtMethod* GetResolutionMethod(); 371 372 bool HasResolutionMethod() const { 373 return resolution_method_ != nullptr; 374 } 375 376 void SetResolutionMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 377 378 ArtMethod* CreateResolutionMethod() REQUIRES_SHARED(Locks::mutator_lock_); 379 380 // Returns a special method that calls into a trampoline for runtime imt conflicts. 381 ArtMethod* GetImtConflictMethod(); 382 ArtMethod* GetImtUnimplementedMethod(); 383 384 bool HasImtConflictMethod() const { 385 return imt_conflict_method_ != nullptr; 386 } 387 388 void FixupConflictTables(); 389 void SetImtConflictMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 390 void SetImtUnimplementedMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 391 392 ArtMethod* CreateImtConflictMethod(LinearAlloc* linear_alloc) 393 REQUIRES_SHARED(Locks::mutator_lock_); 394 395 // Returns a special method that describes all callee saves being spilled to the stack. 396 enum CalleeSaveType { 397 kSaveAllCalleeSaves, // All callee-save registers. 398 kSaveRefsOnly, // Only those callee-save registers that can hold references. 399 kSaveRefsAndArgs, // References (see above) and arguments (usually caller-save registers). 400 kSaveEverything, // All registers, including both callee-save and caller-save. 401 kLastCalleeSaveType // Value used for iteration 402 }; 403 404 bool HasCalleeSaveMethod(CalleeSaveType type) const { 405 return callee_save_methods_[type] != 0u; 406 } 407 408 ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 409 REQUIRES_SHARED(Locks::mutator_lock_); 410 411 ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 412 REQUIRES_SHARED(Locks::mutator_lock_); 413 414 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 415 return callee_save_method_frame_infos_[type]; 416 } 417 418 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method) 419 REQUIRES_SHARED(Locks::mutator_lock_); 420 421 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 422 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[type]); 423 } 424 425 InstructionSet GetInstructionSet() const { 426 return instruction_set_; 427 } 428 429 void SetInstructionSet(InstructionSet instruction_set); 430 431 void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type); 432 433 ArtMethod* CreateCalleeSaveMethod() REQUIRES_SHARED(Locks::mutator_lock_); 434 435 int32_t GetStat(int kind); 436 437 RuntimeStats* GetStats() { 438 return &stats_; 439 } 440 441 bool HasStatsEnabled() const { 442 return stats_enabled_; 443 } 444 445 void ResetStats(int kinds); 446 447 void SetStatsEnabled(bool new_state) 448 REQUIRES(!Locks::instrument_entrypoints_lock_, !Locks::mutator_lock_); 449 450 enum class NativeBridgeAction { // private 451 kUnload, 452 kInitialize 453 }; 454 455 jit::Jit* GetJit() { 456 return jit_.get(); 457 } 458 459 // Returns true if JIT compilations are enabled. GetJit() will be not null in this case. 460 bool UseJitCompilation() const; 461 462 void PreZygoteFork(); 463 void InitNonZygoteOrPostFork( 464 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa); 465 466 const instrumentation::Instrumentation* GetInstrumentation() const { 467 return &instrumentation_; 468 } 469 470 instrumentation::Instrumentation* GetInstrumentation() { 471 return &instrumentation_; 472 } 473 474 void RegisterAppInfo(const std::vector<std::string>& code_paths, 475 const std::string& profile_output_filename, 476 const std::string& foreign_dex_profile_path, 477 const std::string& app_dir); 478 void NotifyDexLoaded(const std::string& dex_location); 479 480 // Transaction support. 481 bool IsActiveTransaction() const { 482 return preinitialization_transaction_ != nullptr; 483 } 484 void EnterTransactionMode(Transaction* transaction); 485 void ExitTransactionMode(); 486 bool IsTransactionAborted() const; 487 488 void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) 489 REQUIRES_SHARED(Locks::mutator_lock_); 490 void ThrowTransactionAbortError(Thread* self) 491 REQUIRES_SHARED(Locks::mutator_lock_); 492 493 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 494 bool is_volatile) const; 495 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 496 bool is_volatile) const; 497 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 498 bool is_volatile) const; 499 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 500 bool is_volatile) const; 501 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 502 bool is_volatile) const; 503 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 504 bool is_volatile) const; 505 void RecordWriteFieldReference(mirror::Object* obj, 506 MemberOffset field_offset, 507 ObjPtr<mirror::Object> value, 508 bool is_volatile) const 509 REQUIRES_SHARED(Locks::mutator_lock_); 510 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 511 REQUIRES_SHARED(Locks::mutator_lock_); 512 void RecordStrongStringInsertion(mirror::String* s) const 513 REQUIRES(Locks::intern_table_lock_); 514 void RecordWeakStringInsertion(mirror::String* s) const 515 REQUIRES(Locks::intern_table_lock_); 516 void RecordStrongStringRemoval(mirror::String* s) const 517 REQUIRES(Locks::intern_table_lock_); 518 void RecordWeakStringRemoval(mirror::String* s) const 519 REQUIRES(Locks::intern_table_lock_); 520 void RecordResolveString(mirror::DexCache* dex_cache, uint32_t string_idx) const 521 REQUIRES_SHARED(Locks::mutator_lock_); 522 523 void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_); 524 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 525 // with the unexpected_signal_lock_. 526 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 527 return fault_message_; 528 } 529 530 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 531 532 bool ExplicitStackOverflowChecks() const { 533 return !implicit_so_checks_; 534 } 535 536 bool IsVerificationEnabled() const; 537 bool IsVerificationSoftFail() const; 538 539 bool IsDexFileFallbackEnabled() const { 540 return allow_dex_file_fallback_; 541 } 542 543 const std::vector<std::string>& GetCpuAbilist() const { 544 return cpu_abilist_; 545 } 546 547 bool IsRunningOnMemoryTool() const { 548 return is_running_on_memory_tool_; 549 } 550 551 void SetTargetSdkVersion(int32_t version) { 552 target_sdk_version_ = version; 553 } 554 555 int32_t GetTargetSdkVersion() const { 556 return target_sdk_version_; 557 } 558 559 uint32_t GetZygoteMaxFailedBoots() const { 560 return zygote_max_failed_boots_; 561 } 562 563 bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) { 564 return (experimental_flags_ & flags) != ExperimentalFlags::kNone; 565 } 566 567 // Create the JIT and instrumentation and code cache. 568 void CreateJit(); 569 570 ArenaPool* GetArenaPool() { 571 return arena_pool_.get(); 572 } 573 ArenaPool* GetJitArenaPool() { 574 return jit_arena_pool_.get(); 575 } 576 const ArenaPool* GetArenaPool() const { 577 return arena_pool_.get(); 578 } 579 580 void ReclaimArenaPoolMemory(); 581 582 LinearAlloc* GetLinearAlloc() { 583 return linear_alloc_.get(); 584 } 585 586 jit::JitOptions* GetJITOptions() { 587 return jit_options_.get(); 588 } 589 590 bool IsDebuggable() const; 591 592 bool IsNativeDebuggable() const { 593 return is_native_debuggable_; 594 } 595 596 void SetNativeDebuggable(bool value) { 597 is_native_debuggable_ = value; 598 } 599 600 // Returns the build fingerprint, if set. Otherwise an empty string is returned. 601 std::string GetFingerprint() { 602 return fingerprint_; 603 } 604 605 // Called from class linker. 606 void SetSentinel(mirror::Object* sentinel) REQUIRES_SHARED(Locks::mutator_lock_); 607 608 // Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler. 609 LinearAlloc* CreateLinearAlloc(); 610 611 OatFileManager& GetOatFileManager() const { 612 DCHECK(oat_file_manager_ != nullptr); 613 return *oat_file_manager_; 614 } 615 616 double GetHashTableMinLoadFactor() const; 617 double GetHashTableMaxLoadFactor() const; 618 619 void SetSafeMode(bool mode) { 620 safe_mode_ = mode; 621 } 622 623 bool GetDumpNativeStackOnSigQuit() const { 624 return dump_native_stack_on_sig_quit_; 625 } 626 627 bool GetPrunedDalvikCache() const { 628 return pruned_dalvik_cache_; 629 } 630 631 void SetPrunedDalvikCache(bool pruned) { 632 pruned_dalvik_cache_ = pruned; 633 } 634 635 void UpdateProcessState(ProcessState process_state); 636 637 // Returns true if we currently care about long mutator pause. 638 bool InJankPerceptibleProcessState() const { 639 return process_state_ == kProcessStateJankPerceptible; 640 } 641 642 void RegisterSensitiveThread() const; 643 644 void SetZygoteNoThreadSection(bool val) { 645 zygote_no_threads_ = val; 646 } 647 648 bool IsZygoteNoThreadSection() const { 649 return zygote_no_threads_; 650 } 651 652 // Returns if the code can be deoptimized. Code may be compiled with some 653 // optimization that makes it impossible to deoptimize. 654 bool IsDeoptimizeable(uintptr_t code) const REQUIRES_SHARED(Locks::mutator_lock_); 655 656 // Returns a saved copy of the environment (getenv/setenv values). 657 // Used by Fork to protect against overwriting LD_LIBRARY_PATH, etc. 658 char** GetEnvSnapshot() const { 659 return env_snapshot_.GetSnapshot(); 660 } 661 662 void AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 663 void RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 664 665 NO_RETURN 666 static void Aborter(const char* abort_message); 667 668 private: 669 static void InitPlatformSignalHandlers(); 670 671 Runtime(); 672 673 void BlockSignals(); 674 675 bool Init(RuntimeArgumentMap&& runtime_options) 676 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 677 void InitNativeMethods() REQUIRES(!Locks::mutator_lock_); 678 void InitThreadGroups(Thread* self); 679 void RegisterRuntimeNativeMethods(JNIEnv* env); 680 681 void StartDaemonThreads(); 682 void StartSignalCatcher(); 683 684 void MaybeSaveJitProfilingInfo(); 685 686 // A pointer to the active runtime or null. 687 static Runtime* instance_; 688 689 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 690 static constexpr int kProfileForground = 0; 691 static constexpr int kProfileBackground = 1; 692 693 // 64 bit so that we can share the same asm offsets for both 32 and 64 bits. 694 uint64_t callee_save_methods_[kLastCalleeSaveType]; 695 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 696 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 697 ArtMethod* resolution_method_; 698 ArtMethod* imt_conflict_method_; 699 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 700 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 701 ArtMethod* imt_unimplemented_method_; 702 703 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 704 // JDWP (invalid references). 705 GcRoot<mirror::Object> sentinel_; 706 707 InstructionSet instruction_set_; 708 QuickMethodFrameInfo callee_save_method_frame_infos_[kLastCalleeSaveType]; 709 710 CompilerCallbacks* compiler_callbacks_; 711 bool is_zygote_; 712 bool must_relocate_; 713 bool is_concurrent_gc_enabled_; 714 bool is_explicit_gc_disabled_; 715 bool dex2oat_enabled_; 716 bool image_dex2oat_enabled_; 717 718 std::string compiler_executable_; 719 std::string patchoat_executable_; 720 std::vector<std::string> compiler_options_; 721 std::vector<std::string> image_compiler_options_; 722 std::string image_location_; 723 724 std::string boot_class_path_string_; 725 std::string class_path_string_; 726 std::vector<std::string> properties_; 727 728 std::vector<ti::Agent> agents_; 729 std::vector<Plugin> plugins_; 730 731 // The default stack size for managed threads created by the runtime. 732 size_t default_stack_size_; 733 734 gc::Heap* heap_; 735 736 std::unique_ptr<ArenaPool> jit_arena_pool_; 737 std::unique_ptr<ArenaPool> arena_pool_; 738 // Special low 4gb pool for compiler linear alloc. We need ArtFields to be in low 4gb if we are 739 // compiling using a 32 bit image on a 64 bit compiler in case we resolve things in the image 740 // since the field arrays are int arrays in this case. 741 std::unique_ptr<ArenaPool> low_4gb_arena_pool_; 742 743 // Shared linear alloc for now. 744 std::unique_ptr<LinearAlloc> linear_alloc_; 745 746 // The number of spins that are done before thread suspension is used to forcibly inflate. 747 size_t max_spins_before_thin_lock_inflation_; 748 MonitorList* monitor_list_; 749 MonitorPool* monitor_pool_; 750 751 ThreadList* thread_list_; 752 753 InternTable* intern_table_; 754 755 ClassLinker* class_linker_; 756 757 SignalCatcher* signal_catcher_; 758 std::string stack_trace_file_; 759 760 std::unique_ptr<JavaVMExt> java_vm_; 761 762 std::unique_ptr<jit::Jit> jit_; 763 std::unique_ptr<jit::JitOptions> jit_options_; 764 765 // Fault message, printed when we get a SIGSEGV. 766 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 767 std::string fault_message_ GUARDED_BY(fault_message_lock_); 768 769 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 770 // the shutdown lock so that threads aren't born while we're shutting down. 771 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 772 773 // Waited upon until no threads are being born. 774 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 775 776 // Set when runtime shutdown is past the point that new threads may attach. 777 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 778 779 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 780 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 781 782 bool started_; 783 784 // New flag added which tells us if the runtime has finished starting. If 785 // this flag is set then the Daemon threads are created and the class loader 786 // is created. This flag is needed for knowing if its safe to request CMS. 787 bool finished_starting_; 788 789 // Hooks supported by JNI_CreateJavaVM 790 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 791 void (*exit_)(jint status); 792 void (*abort_)(); 793 794 bool stats_enabled_; 795 RuntimeStats stats_; 796 797 const bool is_running_on_memory_tool_; 798 799 std::unique_ptr<TraceConfig> trace_config_; 800 801 instrumentation::Instrumentation instrumentation_; 802 803 jobject main_thread_group_; 804 jobject system_thread_group_; 805 806 // As returned by ClassLoader.getSystemClassLoader(). 807 jobject system_class_loader_; 808 809 // If true, then we dump the GC cumulative timings on shutdown. 810 bool dump_gc_performance_on_shutdown_; 811 812 // Transaction used for pre-initializing classes at compilation time. 813 Transaction* preinitialization_transaction_; 814 815 // If kNone, verification is disabled. kEnable by default. 816 verifier::VerifyMode verify_; 817 818 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 819 // available/usable. 820 bool allow_dex_file_fallback_; 821 822 // List of supported cpu abis. 823 std::vector<std::string> cpu_abilist_; 824 825 // Specifies target SDK version to allow workarounds for certain API levels. 826 int32_t target_sdk_version_; 827 828 // Implicit checks flags. 829 bool implicit_null_checks_; // NullPointer checks are implicit. 830 bool implicit_so_checks_; // StackOverflow checks are implicit. 831 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 832 833 // Whether or not the sig chain (and implicitly the fault handler) should be 834 // disabled. Tools like dex2oat or patchoat don't need them. This enables 835 // building a statically link version of dex2oat. 836 bool no_sig_chain_; 837 838 // Force the use of native bridge even if the app ISA matches the runtime ISA. 839 bool force_native_bridge_; 840 841 // Whether or not a native bridge has been loaded. 842 // 843 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 844 // if standard dlopen fails to load native library associated with native activity, it calls to 845 // the native bridge to load it and then gets the trampoline for the entry to native activity. 846 // 847 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 848 // When non-empty the native bridge will be loaded from the given file. An empty value means 849 // that there's no native bridge. 850 bool is_native_bridge_loaded_; 851 852 // Whether we are running under native debugger. 853 bool is_native_debuggable_; 854 855 // The maximum number of failed boots we allow before pruning the dalvik cache 856 // and trying again. This option is only inspected when we're running as a 857 // zygote. 858 uint32_t zygote_max_failed_boots_; 859 860 // Enable experimental opcodes that aren't fully specified yet. The intent is to 861 // eventually publish them as public-usable opcodes, but they aren't ready yet. 862 // 863 // Experimental opcodes should not be used by other production code. 864 ExperimentalFlags experimental_flags_; 865 866 // Contains the build fingerprint, if given as a parameter. 867 std::string fingerprint_; 868 869 // Oat file manager, keeps track of what oat files are open. 870 OatFileManager* oat_file_manager_; 871 872 // Whether or not we are on a low RAM device. 873 bool is_low_memory_mode_; 874 875 // Whether the application should run in safe mode, that is, interpreter only. 876 bool safe_mode_; 877 878 // Whether threads should dump their native stack on SIGQUIT. 879 bool dump_native_stack_on_sig_quit_; 880 881 // Whether the dalvik cache was pruned when initializing the runtime. 882 bool pruned_dalvik_cache_; 883 884 // Whether or not we currently care about pause times. 885 ProcessState process_state_; 886 887 // Whether zygote code is in a section that should not start threads. 888 bool zygote_no_threads_; 889 890 // Saved environment. 891 class EnvSnapshot { 892 public: 893 EnvSnapshot() = default; 894 void TakeSnapshot(); 895 char** GetSnapshot() const; 896 897 private: 898 std::unique_ptr<char*[]> c_env_vector_; 899 std::vector<std::unique_ptr<std::string>> name_value_pairs_; 900 901 DISALLOW_COPY_AND_ASSIGN(EnvSnapshot); 902 } env_snapshot_; 903 904 // Generic system-weak holders. 905 std::vector<gc::AbstractSystemWeakHolder*> system_weak_holders_; 906 907 DISALLOW_COPY_AND_ASSIGN(Runtime); 908}; 909std::ostream& operator<<(std::ostream& os, const Runtime::CalleeSaveType& rhs); 910 911} // namespace art 912 913#endif // ART_RUNTIME_RUNTIME_H_ 914