runtime.h revision 90f8addf6c68a9be6d813e5da7f6bea370a048f9
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ART_RUNTIME_RUNTIME_H_ 18#define ART_RUNTIME_RUNTIME_H_ 19 20#include <jni.h> 21#include <stdio.h> 22 23#include <iosfwd> 24#include <set> 25#include <string> 26#include <utility> 27#include <memory> 28#include <vector> 29 30#include "arch/instruction_set.h" 31#include "base/macros.h" 32#include "base/mutex.h" 33#include "deoptimization_kind.h" 34#include "dex/dex_file_types.h" 35#include "experimental_flags.h" 36#include "gc_root.h" 37#include "instrumentation.h" 38#include "jdwp_provider.h" 39#include "obj_ptr.h" 40#include "offsets.h" 41#include "process_state.h" 42#include "quick/quick_method_frame_info.h" 43#include "runtime_stats.h" 44 45namespace art { 46 47namespace gc { 48class AbstractSystemWeakHolder; 49class Heap; 50} // namespace gc 51 52namespace hiddenapi { 53enum class EnforcementPolicy; 54} // namespace hiddenapi 55 56namespace jit { 57class Jit; 58class JitOptions; 59} // namespace jit 60 61namespace mirror { 62class Array; 63class ClassLoader; 64class DexCache; 65template<class T> class ObjectArray; 66template<class T> class PrimitiveArray; 67typedef PrimitiveArray<int8_t> ByteArray; 68class String; 69class Throwable; 70} // namespace mirror 71namespace ti { 72class Agent; 73class AgentSpec; 74} // namespace ti 75namespace verifier { 76class MethodVerifier; 77enum class VerifyMode : int8_t; 78} // namespace verifier 79class ArenaPool; 80class ArtMethod; 81enum class CalleeSaveType: uint32_t; 82class ClassLinker; 83class CompilerCallbacks; 84class DexFile; 85class InternTable; 86class IsMarkedVisitor; 87class JavaVMExt; 88class LinearAlloc; 89class MemMap; 90class MonitorList; 91class MonitorPool; 92class NullPointerHandler; 93class OatFileManager; 94class Plugin; 95struct RuntimeArgumentMap; 96class RuntimeCallbacks; 97class SignalCatcher; 98class StackOverflowHandler; 99class SuspensionHandler; 100class ThreadList; 101class Trace; 102struct TraceConfig; 103class Transaction; 104 105typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 106 107class Runtime { 108 public: 109 // Parse raw runtime options. 110 static bool ParseOptions(const RuntimeOptions& raw_options, 111 bool ignore_unrecognized, 112 RuntimeArgumentMap* runtime_options); 113 114 // Creates and initializes a new runtime. 115 static bool Create(RuntimeArgumentMap&& runtime_options) 116 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 117 118 // Creates and initializes a new runtime. 119 static bool Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) 120 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 121 122 // IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently. 123 bool IsAotCompiler() const { 124 return !UseJitCompilation() && IsCompiler(); 125 } 126 127 // IsCompiler is any runtime which has a running compiler, either dex2oat or JIT. 128 bool IsCompiler() const { 129 return compiler_callbacks_ != nullptr; 130 } 131 132 // If a compiler, are we compiling a boot image? 133 bool IsCompilingBootImage() const; 134 135 bool CanRelocate() const; 136 137 bool ShouldRelocate() const { 138 return must_relocate_ && CanRelocate(); 139 } 140 141 bool MustRelocateIfPossible() const { 142 return must_relocate_; 143 } 144 145 bool IsDex2OatEnabled() const { 146 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 147 } 148 149 bool IsImageDex2OatEnabled() const { 150 return image_dex2oat_enabled_; 151 } 152 153 CompilerCallbacks* GetCompilerCallbacks() { 154 return compiler_callbacks_; 155 } 156 157 void SetCompilerCallbacks(CompilerCallbacks* callbacks) { 158 CHECK(callbacks != nullptr); 159 compiler_callbacks_ = callbacks; 160 } 161 162 bool IsZygote() const { 163 return is_zygote_; 164 } 165 166 bool IsExplicitGcDisabled() const { 167 return is_explicit_gc_disabled_; 168 } 169 170 std::string GetCompilerExecutable() const; 171 std::string GetPatchoatExecutable() const; 172 173 const std::vector<std::string>& GetCompilerOptions() const { 174 return compiler_options_; 175 } 176 177 void AddCompilerOption(const std::string& option) { 178 compiler_options_.push_back(option); 179 } 180 181 const std::vector<std::string>& GetImageCompilerOptions() const { 182 return image_compiler_options_; 183 } 184 185 const std::string& GetImageLocation() const { 186 return image_location_; 187 } 188 189 // Starts a runtime, which may cause threads to be started and code to run. 190 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 191 192 bool IsShuttingDown(Thread* self); 193 bool IsShuttingDownLocked() const REQUIRES(Locks::runtime_shutdown_lock_) { 194 return shutting_down_; 195 } 196 197 size_t NumberOfThreadsBeingBorn() const REQUIRES(Locks::runtime_shutdown_lock_) { 198 return threads_being_born_; 199 } 200 201 void StartThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 202 threads_being_born_++; 203 } 204 205 void EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_); 206 207 bool IsStarted() const { 208 return started_; 209 } 210 211 bool IsFinishedStarting() const { 212 return finished_starting_; 213 } 214 215 static Runtime* Current() { 216 return instance_; 217 } 218 219 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 220 // callers should prefer. 221 NO_RETURN static void Abort(const char* msg) REQUIRES(!Locks::abort_lock_); 222 223 // Returns the "main" ThreadGroup, used when attaching user threads. 224 jobject GetMainThreadGroup() const; 225 226 // Returns the "system" ThreadGroup, used when attaching our internal threads. 227 jobject GetSystemThreadGroup() const; 228 229 // Returns the system ClassLoader which represents the CLASSPATH. 230 jobject GetSystemClassLoader() const; 231 232 // Attaches the calling native thread to the runtime. 233 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 234 bool create_peer); 235 236 void CallExitHook(jint status); 237 238 // Detaches the current native thread from the runtime. 239 void DetachCurrentThread() REQUIRES(!Locks::mutator_lock_); 240 241 void DumpDeoptimizations(std::ostream& os); 242 void DumpForSigQuit(std::ostream& os); 243 void DumpLockHolders(std::ostream& os); 244 245 ~Runtime(); 246 247 const std::string& GetBootClassPathString() const { 248 return boot_class_path_string_; 249 } 250 251 const std::string& GetClassPathString() const { 252 return class_path_string_; 253 } 254 255 ClassLinker* GetClassLinker() const { 256 return class_linker_; 257 } 258 259 size_t GetDefaultStackSize() const { 260 return default_stack_size_; 261 } 262 263 gc::Heap* GetHeap() const { 264 return heap_; 265 } 266 267 InternTable* GetInternTable() const { 268 DCHECK(intern_table_ != nullptr); 269 return intern_table_; 270 } 271 272 JavaVMExt* GetJavaVM() const { 273 return java_vm_.get(); 274 } 275 276 size_t GetMaxSpinsBeforeThinLockInflation() const { 277 return max_spins_before_thin_lock_inflation_; 278 } 279 280 MonitorList* GetMonitorList() const { 281 return monitor_list_; 282 } 283 284 MonitorPool* GetMonitorPool() const { 285 return monitor_pool_; 286 } 287 288 // Is the given object the special object used to mark a cleared JNI weak global? 289 bool IsClearedJniWeakGlobal(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 290 291 // Get the special object used to mark a cleared JNI weak global. 292 mirror::Object* GetClearedJniWeakGlobal() REQUIRES_SHARED(Locks::mutator_lock_); 293 294 mirror::Throwable* GetPreAllocatedOutOfMemoryError() REQUIRES_SHARED(Locks::mutator_lock_); 295 296 mirror::Throwable* GetPreAllocatedNoClassDefFoundError() 297 REQUIRES_SHARED(Locks::mutator_lock_); 298 299 const std::vector<std::string>& GetProperties() const { 300 return properties_; 301 } 302 303 ThreadList* GetThreadList() const { 304 return thread_list_; 305 } 306 307 static const char* GetVersion() { 308 return "2.1.0"; 309 } 310 311 bool IsMethodHandlesEnabled() const { 312 return true; 313 } 314 315 void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 316 void AllowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_); 317 // broadcast_for_checkpoint is true when we broadcast for making blocking threads to respond to 318 // checkpoint requests. It's false when we broadcast to unblock blocking threads after system weak 319 // access is reenabled. 320 void BroadcastForNewSystemWeaks(bool broadcast_for_checkpoint = false); 321 322 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 323 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 324 void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots) 325 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 326 REQUIRES_SHARED(Locks::mutator_lock_); 327 328 // Visit image roots, only used for hprof since the GC uses the image space mod union table 329 // instead. 330 void VisitImageRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 331 332 // Visit all of the roots we can safely visit concurrently. 333 void VisitConcurrentRoots(RootVisitor* visitor, 334 VisitRootFlags flags = kVisitRootFlagAllRoots) 335 REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_) 336 REQUIRES_SHARED(Locks::mutator_lock_); 337 338 // Visit all of the non thread roots, we can do this with mutators unpaused. 339 void VisitNonThreadRoots(RootVisitor* visitor) 340 REQUIRES_SHARED(Locks::mutator_lock_); 341 342 void VisitTransactionRoots(RootVisitor* visitor) 343 REQUIRES_SHARED(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 void ClearResolutionMethod() { 359 resolution_method_ = nullptr; 360 } 361 362 ArtMethod* CreateResolutionMethod() REQUIRES_SHARED(Locks::mutator_lock_); 363 364 // Returns a special method that calls into a trampoline for runtime imt conflicts. 365 ArtMethod* GetImtConflictMethod(); 366 ArtMethod* GetImtUnimplementedMethod(); 367 368 bool HasImtConflictMethod() const { 369 return imt_conflict_method_ != nullptr; 370 } 371 372 void ClearImtConflictMethod() { 373 imt_conflict_method_ = nullptr; 374 } 375 376 void FixupConflictTables(); 377 void SetImtConflictMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 378 void SetImtUnimplementedMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_); 379 380 ArtMethod* CreateImtConflictMethod(LinearAlloc* linear_alloc) 381 REQUIRES_SHARED(Locks::mutator_lock_); 382 383 void ClearImtUnimplementedMethod() { 384 imt_unimplemented_method_ = nullptr; 385 } 386 387 bool HasCalleeSaveMethod(CalleeSaveType type) const { 388 return callee_save_methods_[static_cast<size_t>(type)] != 0u; 389 } 390 391 ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 392 REQUIRES_SHARED(Locks::mutator_lock_); 393 394 ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 395 REQUIRES_SHARED(Locks::mutator_lock_); 396 397 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 398 return callee_save_method_frame_infos_[static_cast<size_t>(type)]; 399 } 400 401 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method) 402 REQUIRES_SHARED(Locks::mutator_lock_); 403 404 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 405 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[static_cast<size_t>(type)]); 406 } 407 408 InstructionSet GetInstructionSet() const { 409 return instruction_set_; 410 } 411 412 void SetInstructionSet(InstructionSet instruction_set); 413 void ClearInstructionSet(); 414 415 void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type); 416 void ClearCalleeSaveMethods(); 417 418 ArtMethod* CreateCalleeSaveMethod() REQUIRES_SHARED(Locks::mutator_lock_); 419 420 int32_t GetStat(int kind); 421 422 RuntimeStats* GetStats() { 423 return &stats_; 424 } 425 426 bool HasStatsEnabled() const { 427 return stats_enabled_; 428 } 429 430 void ResetStats(int kinds); 431 432 void SetStatsEnabled(bool new_state) 433 REQUIRES(!Locks::instrument_entrypoints_lock_, !Locks::mutator_lock_); 434 435 enum class NativeBridgeAction { // private 436 kUnload, 437 kInitialize 438 }; 439 440 jit::Jit* GetJit() const { 441 return jit_.get(); 442 } 443 444 // Returns true if JIT compilations are enabled. GetJit() will be not null in this case. 445 bool UseJitCompilation() const; 446 447 void PreZygoteFork(); 448 void InitNonZygoteOrPostFork( 449 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa); 450 451 const instrumentation::Instrumentation* GetInstrumentation() const { 452 return &instrumentation_; 453 } 454 455 instrumentation::Instrumentation* GetInstrumentation() { 456 return &instrumentation_; 457 } 458 459 void RegisterAppInfo(const std::vector<std::string>& code_paths, 460 const std::string& profile_output_filename); 461 462 // Transaction support. 463 bool IsActiveTransaction() const; 464 void EnterTransactionMode(); 465 void EnterTransactionMode(bool strict, mirror::Class* root); 466 void ExitTransactionMode(); 467 void RollbackAllTransactions() REQUIRES_SHARED(Locks::mutator_lock_); 468 // Transaction rollback and exit transaction are always done together, it's convenience to 469 // do them in one function. 470 void RollbackAndExitTransactionMode() REQUIRES_SHARED(Locks::mutator_lock_); 471 bool IsTransactionAborted() const; 472 const std::unique_ptr<Transaction>& GetTransaction() const; 473 bool IsActiveStrictTransactionMode() const; 474 475 void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) 476 REQUIRES_SHARED(Locks::mutator_lock_); 477 void ThrowTransactionAbortError(Thread* self) 478 REQUIRES_SHARED(Locks::mutator_lock_); 479 480 void RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, uint8_t value, 481 bool is_volatile) const; 482 void RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, int8_t value, 483 bool is_volatile) const; 484 void RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, uint16_t value, 485 bool is_volatile) const; 486 void RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, int16_t value, 487 bool is_volatile) const; 488 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 489 bool is_volatile) const; 490 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 491 bool is_volatile) const; 492 void RecordWriteFieldReference(mirror::Object* obj, 493 MemberOffset field_offset, 494 ObjPtr<mirror::Object> value, 495 bool is_volatile) const 496 REQUIRES_SHARED(Locks::mutator_lock_); 497 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 498 REQUIRES_SHARED(Locks::mutator_lock_); 499 void RecordStrongStringInsertion(ObjPtr<mirror::String> s) const 500 REQUIRES(Locks::intern_table_lock_); 501 void RecordWeakStringInsertion(ObjPtr<mirror::String> s) const 502 REQUIRES(Locks::intern_table_lock_); 503 void RecordStrongStringRemoval(ObjPtr<mirror::String> s) const 504 REQUIRES(Locks::intern_table_lock_); 505 void RecordWeakStringRemoval(ObjPtr<mirror::String> s) const 506 REQUIRES(Locks::intern_table_lock_); 507 void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, dex::StringIndex string_idx) const 508 REQUIRES_SHARED(Locks::mutator_lock_); 509 510 void SetFaultMessage(const std::string& message) REQUIRES(!fault_message_lock_); 511 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 512 // with the unexpected_signal_lock_. 513 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 514 return fault_message_; 515 } 516 517 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 518 519 bool ExplicitStackOverflowChecks() const { 520 return !implicit_so_checks_; 521 } 522 523 void DisableVerifier(); 524 bool IsVerificationEnabled() const; 525 bool IsVerificationSoftFail() const; 526 527 void SetHiddenApiEnforcementPolicy(hiddenapi::EnforcementPolicy policy) { 528 hidden_api_policy_ = policy; 529 } 530 531 hiddenapi::EnforcementPolicy GetHiddenApiEnforcementPolicy() const { 532 return hidden_api_policy_; 533 } 534 535 void SetPendingHiddenApiWarning(bool value) { 536 pending_hidden_api_warning_ = value; 537 } 538 539 void SetHiddenApiExemptions(const std::vector<std::string>& exemptions) { 540 hidden_api_exemptions_ = exemptions; 541 } 542 543 const std::vector<std::string>& GetHiddenApiExemptions() { 544 return hidden_api_exemptions_; 545 } 546 547 bool HasPendingHiddenApiWarning() const { 548 return pending_hidden_api_warning_; 549 } 550 551 void SetDedupeHiddenApiWarnings(bool value) { 552 dedupe_hidden_api_warnings_ = value; 553 } 554 555 bool ShouldDedupeHiddenApiWarnings() { 556 return dedupe_hidden_api_warnings_; 557 } 558 559 void AlwaysSetHiddenApiWarningFlag() { 560 always_set_hidden_api_warning_flag_ = true; 561 } 562 563 bool ShouldAlwaysSetHiddenApiWarningFlag() const { 564 return always_set_hidden_api_warning_flag_; 565 } 566 567 void SetHiddenApiEventLogSampleRate(uint32_t rate) { 568 hidden_api_access_event_log_rate_ = rate; 569 } 570 571 uint32_t GetHiddenApiEventLogSampleRate() const { 572 return hidden_api_access_event_log_rate_; 573 } 574 575 bool IsDexFileFallbackEnabled() const { 576 return allow_dex_file_fallback_; 577 } 578 579 const std::vector<std::string>& GetCpuAbilist() const { 580 return cpu_abilist_; 581 } 582 583 bool IsRunningOnMemoryTool() const { 584 return is_running_on_memory_tool_; 585 } 586 587 void SetTargetSdkVersion(int32_t version) { 588 target_sdk_version_ = version; 589 } 590 591 int32_t GetTargetSdkVersion() const { 592 return target_sdk_version_; 593 } 594 595 uint32_t GetZygoteMaxFailedBoots() const { 596 return zygote_max_failed_boots_; 597 } 598 599 bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) { 600 return (experimental_flags_ & flags) != ExperimentalFlags::kNone; 601 } 602 603 // Create the JIT and instrumentation and code cache. 604 void CreateJit(); 605 606 ArenaPool* GetArenaPool() { 607 return arena_pool_.get(); 608 } 609 ArenaPool* GetJitArenaPool() { 610 return jit_arena_pool_.get(); 611 } 612 const ArenaPool* GetArenaPool() const { 613 return arena_pool_.get(); 614 } 615 616 void ReclaimArenaPoolMemory(); 617 618 LinearAlloc* GetLinearAlloc() { 619 return linear_alloc_.get(); 620 } 621 622 jit::JitOptions* GetJITOptions() { 623 return jit_options_.get(); 624 } 625 626 bool IsJavaDebuggable() const { 627 return is_java_debuggable_; 628 } 629 630 void SetJavaDebuggable(bool value); 631 632 // Deoptimize the boot image, called for Java debuggable apps. 633 void DeoptimizeBootImage(); 634 635 bool IsNativeDebuggable() const { 636 return is_native_debuggable_; 637 } 638 639 void SetNativeDebuggable(bool value) { 640 is_native_debuggable_ = value; 641 } 642 643 bool AreAsyncExceptionsThrown() const { 644 return async_exceptions_thrown_; 645 } 646 647 void SetAsyncExceptionsThrown() { 648 async_exceptions_thrown_ = true; 649 } 650 651 // Returns the build fingerprint, if set. Otherwise an empty string is returned. 652 std::string GetFingerprint() { 653 return fingerprint_; 654 } 655 656 // Called from class linker. 657 void SetSentinel(mirror::Object* sentinel) REQUIRES_SHARED(Locks::mutator_lock_); 658 659 // Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler. 660 LinearAlloc* CreateLinearAlloc(); 661 662 OatFileManager& GetOatFileManager() const { 663 DCHECK(oat_file_manager_ != nullptr); 664 return *oat_file_manager_; 665 } 666 667 double GetHashTableMinLoadFactor() const; 668 double GetHashTableMaxLoadFactor() const; 669 670 void SetSafeMode(bool mode) { 671 safe_mode_ = mode; 672 } 673 674 bool GetDumpNativeStackOnSigQuit() const { 675 return dump_native_stack_on_sig_quit_; 676 } 677 678 bool GetPrunedDalvikCache() const { 679 return pruned_dalvik_cache_; 680 } 681 682 void SetPrunedDalvikCache(bool pruned) { 683 pruned_dalvik_cache_ = pruned; 684 } 685 686 void UpdateProcessState(ProcessState process_state); 687 688 // Returns true if we currently care about long mutator pause. 689 bool InJankPerceptibleProcessState() const { 690 return process_state_ == kProcessStateJankPerceptible; 691 } 692 693 void RegisterSensitiveThread() const; 694 695 void SetZygoteNoThreadSection(bool val) { 696 zygote_no_threads_ = val; 697 } 698 699 bool IsZygoteNoThreadSection() const { 700 return zygote_no_threads_; 701 } 702 703 // Returns if the code can be deoptimized asynchronously. Code may be compiled with some 704 // optimization that makes it impossible to deoptimize. 705 bool IsAsyncDeoptimizeable(uintptr_t code) const REQUIRES_SHARED(Locks::mutator_lock_); 706 707 // Returns a saved copy of the environment (getenv/setenv values). 708 // Used by Fork to protect against overwriting LD_LIBRARY_PATH, etc. 709 char** GetEnvSnapshot() const { 710 return env_snapshot_.GetSnapshot(); 711 } 712 713 void AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 714 void RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder); 715 716 void AttachAgent(JNIEnv* env, const std::string& agent_arg, jobject class_loader); 717 718 const std::list<std::unique_ptr<ti::Agent>>& GetAgents() const { 719 return agents_; 720 } 721 722 RuntimeCallbacks* GetRuntimeCallbacks(); 723 724 bool HasLoadedPlugins() const { 725 return !plugins_.empty(); 726 } 727 728 void InitThreadGroups(Thread* self); 729 730 void SetDumpGCPerformanceOnShutdown(bool value) { 731 dump_gc_performance_on_shutdown_ = value; 732 } 733 734 void IncrementDeoptimizationCount(DeoptimizationKind kind) { 735 DCHECK_LE(kind, DeoptimizationKind::kLast); 736 deoptimization_counts_[static_cast<size_t>(kind)]++; 737 } 738 739 uint32_t GetNumberOfDeoptimizations() const { 740 uint32_t result = 0; 741 for (size_t i = 0; i <= static_cast<size_t>(DeoptimizationKind::kLast); ++i) { 742 result += deoptimization_counts_[i]; 743 } 744 return result; 745 } 746 747 // Whether or not we use MADV_RANDOM on files that are thought to have random access patterns. 748 // This is beneficial for low RAM devices since it reduces page cache thrashing. 749 bool MAdviseRandomAccess() const { 750 return madvise_random_access_; 751 } 752 753 const std::string& GetJdwpOptions() { 754 return jdwp_options_; 755 } 756 757 JdwpProvider GetJdwpProvider() const { 758 return jdwp_provider_; 759 } 760 761 static constexpr int32_t kUnsetSdkVersion = 0u; 762 763 private: 764 static void InitPlatformSignalHandlers(); 765 766 Runtime(); 767 768 void BlockSignals(); 769 770 bool Init(RuntimeArgumentMap&& runtime_options) 771 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 772 void InitNativeMethods() REQUIRES(!Locks::mutator_lock_); 773 void RegisterRuntimeNativeMethods(JNIEnv* env); 774 775 void StartDaemonThreads(); 776 void StartSignalCatcher(); 777 778 void MaybeSaveJitProfilingInfo(); 779 780 // Visit all of the thread roots. 781 void VisitThreadRoots(RootVisitor* visitor, VisitRootFlags flags) 782 REQUIRES_SHARED(Locks::mutator_lock_); 783 784 // Visit all other roots which must be done with mutators suspended. 785 void VisitNonConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) 786 REQUIRES_SHARED(Locks::mutator_lock_); 787 788 // Constant roots are the roots which never change after the runtime is initialized, they only 789 // need to be visited once per GC cycle. 790 void VisitConstantRoots(RootVisitor* visitor) 791 REQUIRES_SHARED(Locks::mutator_lock_); 792 793 // A pointer to the active runtime or null. 794 static Runtime* instance_; 795 796 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 797 static constexpr int kProfileForground = 0; 798 static constexpr int kProfileBackground = 1; 799 800 static constexpr uint32_t kCalleeSaveSize = 6u; 801 802 // 64 bit so that we can share the same asm offsets for both 32 and 64 bits. 803 uint64_t callee_save_methods_[kCalleeSaveSize]; 804 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 805 GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_; 806 ArtMethod* resolution_method_; 807 ArtMethod* imt_conflict_method_; 808 // Unresolved method has the same behavior as the conflict method, it is used by the class linker 809 // for differentiating between unfilled imt slots vs conflict slots in superclasses. 810 ArtMethod* imt_unimplemented_method_; 811 812 // Special sentinel object used to invalid conditions in JNI (cleared weak references) and 813 // JDWP (invalid references). 814 GcRoot<mirror::Object> sentinel_; 815 816 InstructionSet instruction_set_; 817 QuickMethodFrameInfo callee_save_method_frame_infos_[kCalleeSaveSize]; 818 819 CompilerCallbacks* compiler_callbacks_; 820 bool is_zygote_; 821 bool must_relocate_; 822 bool is_concurrent_gc_enabled_; 823 bool is_explicit_gc_disabled_; 824 bool dex2oat_enabled_; 825 bool image_dex2oat_enabled_; 826 827 std::string compiler_executable_; 828 std::string patchoat_executable_; 829 std::vector<std::string> compiler_options_; 830 std::vector<std::string> image_compiler_options_; 831 std::string image_location_; 832 833 std::string boot_class_path_string_; 834 std::string class_path_string_; 835 std::vector<std::string> properties_; 836 837 std::list<ti::AgentSpec> agent_specs_; 838 std::list<std::unique_ptr<ti::Agent>> agents_; 839 std::vector<Plugin> plugins_; 840 841 // The default stack size for managed threads created by the runtime. 842 size_t default_stack_size_; 843 844 gc::Heap* heap_; 845 846 std::unique_ptr<ArenaPool> jit_arena_pool_; 847 std::unique_ptr<ArenaPool> arena_pool_; 848 // Special low 4gb pool for compiler linear alloc. We need ArtFields to be in low 4gb if we are 849 // compiling using a 32 bit image on a 64 bit compiler in case we resolve things in the image 850 // since the field arrays are int arrays in this case. 851 std::unique_ptr<ArenaPool> low_4gb_arena_pool_; 852 853 // Shared linear alloc for now. 854 std::unique_ptr<LinearAlloc> linear_alloc_; 855 856 // The number of spins that are done before thread suspension is used to forcibly inflate. 857 size_t max_spins_before_thin_lock_inflation_; 858 MonitorList* monitor_list_; 859 MonitorPool* monitor_pool_; 860 861 ThreadList* thread_list_; 862 863 InternTable* intern_table_; 864 865 ClassLinker* class_linker_; 866 867 SignalCatcher* signal_catcher_; 868 869 // If true, the runtime will connect to tombstoned via a socket to 870 // request an open file descriptor to write its traces to. 871 bool use_tombstoned_traces_; 872 873 // Location to which traces must be written on SIGQUIT. Only used if 874 // tombstoned_traces_ == false. 875 std::string stack_trace_file_; 876 877 std::unique_ptr<JavaVMExt> java_vm_; 878 879 std::unique_ptr<jit::Jit> jit_; 880 std::unique_ptr<jit::JitOptions> jit_options_; 881 882 // Fault message, printed when we get a SIGSEGV. 883 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 884 std::string fault_message_ GUARDED_BY(fault_message_lock_); 885 886 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 887 // the shutdown lock so that threads aren't born while we're shutting down. 888 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 889 890 // Waited upon until no threads are being born. 891 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 892 893 // Set when runtime shutdown is past the point that new threads may attach. 894 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 895 896 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 897 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 898 899 bool started_; 900 901 // New flag added which tells us if the runtime has finished starting. If 902 // this flag is set then the Daemon threads are created and the class loader 903 // is created. This flag is needed for knowing if its safe to request CMS. 904 bool finished_starting_; 905 906 // Hooks supported by JNI_CreateJavaVM 907 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 908 void (*exit_)(jint status); 909 void (*abort_)(); 910 911 bool stats_enabled_; 912 RuntimeStats stats_; 913 914 const bool is_running_on_memory_tool_; 915 916 std::unique_ptr<TraceConfig> trace_config_; 917 918 instrumentation::Instrumentation instrumentation_; 919 920 jobject main_thread_group_; 921 jobject system_thread_group_; 922 923 // As returned by ClassLoader.getSystemClassLoader(). 924 jobject system_class_loader_; 925 926 // If true, then we dump the GC cumulative timings on shutdown. 927 bool dump_gc_performance_on_shutdown_; 928 929 // Transactions used for pre-initializing classes at compilation time. 930 // Support nested transactions, maintain a list containing all transactions. Transactions are 931 // handled under a stack discipline. Because GC needs to go over all transactions, we choose list 932 // as substantial data structure instead of stack. 933 std::list<std::unique_ptr<Transaction>> preinitialization_transactions_; 934 935 // If kNone, verification is disabled. kEnable by default. 936 verifier::VerifyMode verify_; 937 938 // If true, the runtime may use dex files directly with the interpreter if an oat file is not 939 // available/usable. 940 bool allow_dex_file_fallback_; 941 942 // List of supported cpu abis. 943 std::vector<std::string> cpu_abilist_; 944 945 // Specifies target SDK version to allow workarounds for certain API levels. 946 int32_t target_sdk_version_; 947 948 // Implicit checks flags. 949 bool implicit_null_checks_; // NullPointer checks are implicit. 950 bool implicit_so_checks_; // StackOverflow checks are implicit. 951 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 952 953 // Whether or not the sig chain (and implicitly the fault handler) should be 954 // disabled. Tools like dex2oat or patchoat don't need them. This enables 955 // building a statically link version of dex2oat. 956 bool no_sig_chain_; 957 958 // Force the use of native bridge even if the app ISA matches the runtime ISA. 959 bool force_native_bridge_; 960 961 // Whether or not a native bridge has been loaded. 962 // 963 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 964 // if standard dlopen fails to load native library associated with native activity, it calls to 965 // the native bridge to load it and then gets the trampoline for the entry to native activity. 966 // 967 // The option 'native_bridge_library_filename' specifies the name of the native bridge. 968 // When non-empty the native bridge will be loaded from the given file. An empty value means 969 // that there's no native bridge. 970 bool is_native_bridge_loaded_; 971 972 // Whether we are running under native debugger. 973 bool is_native_debuggable_; 974 975 // whether or not any async exceptions have ever been thrown. This is used to speed up the 976 // MterpShouldSwitchInterpreters function. 977 bool async_exceptions_thrown_; 978 979 // Whether Java code needs to be debuggable. 980 bool is_java_debuggable_; 981 982 // The maximum number of failed boots we allow before pruning the dalvik cache 983 // and trying again. This option is only inspected when we're running as a 984 // zygote. 985 uint32_t zygote_max_failed_boots_; 986 987 // Enable experimental opcodes that aren't fully specified yet. The intent is to 988 // eventually publish them as public-usable opcodes, but they aren't ready yet. 989 // 990 // Experimental opcodes should not be used by other production code. 991 ExperimentalFlags experimental_flags_; 992 993 // Contains the build fingerprint, if given as a parameter. 994 std::string fingerprint_; 995 996 // Oat file manager, keeps track of what oat files are open. 997 OatFileManager* oat_file_manager_; 998 999 // Whether or not we are on a low RAM device. 1000 bool is_low_memory_mode_; 1001 1002 // Whether or not we use MADV_RANDOM on files that are thought to have random access patterns. 1003 // This is beneficial for low RAM devices since it reduces page cache thrashing. 1004 bool madvise_random_access_; 1005 1006 // Whether the application should run in safe mode, that is, interpreter only. 1007 bool safe_mode_; 1008 1009 // Whether access checks on hidden API should be performed. 1010 hiddenapi::EnforcementPolicy hidden_api_policy_; 1011 1012 // List of signature prefixes of methods that have been removed from the blacklist, and treated 1013 // as if whitelisted. 1014 std::vector<std::string> hidden_api_exemptions_; 1015 1016 // Whether the application has used an API which is not restricted but we 1017 // should issue a warning about it. 1018 bool pending_hidden_api_warning_; 1019 1020 // Do not warn about the same hidden API access violation twice. 1021 // This is only used for testing. 1022 bool dedupe_hidden_api_warnings_; 1023 1024 // Hidden API can print warnings into the log and/or set a flag read by the 1025 // framework to show a UI warning. If this flag is set, always set the flag 1026 // when there is a warning. This is only used for testing. 1027 bool always_set_hidden_api_warning_flag_; 1028 1029 // How often to log hidden API access to the event log. An integer between 0 (never) 1030 // and 0x10000 (always). 1031 uint32_t hidden_api_access_event_log_rate_; 1032 1033 // Whether threads should dump their native stack on SIGQUIT. 1034 bool dump_native_stack_on_sig_quit_; 1035 1036 // Whether the dalvik cache was pruned when initializing the runtime. 1037 bool pruned_dalvik_cache_; 1038 1039 // Whether or not we currently care about pause times. 1040 ProcessState process_state_; 1041 1042 // Whether zygote code is in a section that should not start threads. 1043 bool zygote_no_threads_; 1044 1045 // The string containing requested jdwp options 1046 std::string jdwp_options_; 1047 1048 // The jdwp provider we were configured with. 1049 JdwpProvider jdwp_provider_; 1050 1051 // Saved environment. 1052 class EnvSnapshot { 1053 public: 1054 EnvSnapshot() = default; 1055 void TakeSnapshot(); 1056 char** GetSnapshot() const; 1057 1058 private: 1059 std::unique_ptr<char*[]> c_env_vector_; 1060 std::vector<std::unique_ptr<std::string>> name_value_pairs_; 1061 1062 DISALLOW_COPY_AND_ASSIGN(EnvSnapshot); 1063 } env_snapshot_; 1064 1065 // Generic system-weak holders. 1066 std::vector<gc::AbstractSystemWeakHolder*> system_weak_holders_; 1067 1068 std::unique_ptr<RuntimeCallbacks> callbacks_; 1069 1070 std::atomic<uint32_t> deoptimization_counts_[ 1071 static_cast<uint32_t>(DeoptimizationKind::kLast) + 1]; 1072 1073 std::unique_ptr<MemMap> protected_fault_page_; 1074 1075 DISALLOW_COPY_AND_ASSIGN(Runtime); 1076}; 1077 1078} // namespace art 1079 1080#endif // ART_RUNTIME_RUNTIME_H_ 1081