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* Copyright (C) 2011 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <jni.h>
#include <stdio.h>
#include <forward_list>
#include <iosfwd>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "app_info.h"
#include "base/locks.h"
#include "base/macros.h"
#include "base/mem_map.h"
#include "base/metrics/metrics.h"
#include "base/os.h"
#include "base/string_view_cpp20.h"
#include "base/unix_file/fd_file.h"
#include "compat_framework.h"
#include "deoptimization_kind.h"
#include "dex/dex_file_types.h"
#include "experimental_flags.h"
#include "gc_root.h"
#include "instrumentation.h"
#include "jdwp_provider.h"
#include "jni/jni_id_manager.h"
#include "jni_id_type.h"
#include "metrics/reporter.h"
#include "obj_ptr.h"
#include "offsets.h"
#include "process_state.h"
#include "quick/quick_method_frame_info.h"
#include "reflective_value_visitor.h"
#include "runtime_stats.h"
namespace art HIDDEN {
namespace gc {
class AbstractSystemWeakHolder;
class Heap;
} // namespace gc
namespace hiddenapi {
enum class EnforcementPolicy;
} // namespace hiddenapi
namespace jit {
class Jit;
class JitCodeCache;
class JitOptions;
} // namespace jit
namespace jni {
class SmallLrtAllocator;
} // namespace jni
namespace mirror {
class Array;
class ClassLoader;
class DexCache;
template<class T> class ObjectArray;
template<class T> class PrimitiveArray;
using ByteArray = PrimitiveArray<int8_t>;
class String;
class Throwable;
} // namespace mirror
namespace ti {
class Agent;
class AgentSpec;
} // namespace ti
namespace verifier {
class MethodVerifier;
enum class VerifyMode : int8_t;
} // namespace verifier
class ArenaPool;
class ArtMethod;
enum class CalleeSaveType: uint32_t;
class ClassLinker;
class CompilerCallbacks;
class Dex2oatImageTest;
class DexFile;
enum class InstructionSet;
class InternTable;
class IsMarkedVisitor;
class JavaVMExt;
class LinearAlloc;
class MonitorList;
class MonitorPool;
class NullPointerHandler;
class OatFileAssistantTest;
class OatFileManager;
class Plugin;
struct RuntimeArgumentMap;
class RuntimeCallbacks;
class SignalCatcher;
class StackOverflowHandler;
class SuspensionHandler;
class ThreadList;
class ThreadPool;
class Trace;
struct TraceConfig;
class Transaction;
using RuntimeOptions = std::vector<std::pair<std::string, const void*>>;
class Runtime {
// Parse raw runtime options.
EXPORT static bool ParseOptions(const RuntimeOptions& raw_options,
bool ignore_unrecognized,
RuntimeArgumentMap* runtime_options);
// Creates and initializes a new runtime.
EXPORT static bool Create(RuntimeArgumentMap&& runtime_options)
SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_);
// Creates and initializes a new runtime.
EXPORT static bool Create(const RuntimeOptions& raw_options, bool ignore_unrecognized)
SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_);
enum class RuntimeDebugState {
// This doesn't support any debug features / method tracing. This is the expected state usually.
// This supports method tracing and a restricted set of debug features (for ex: redefinition
// isn't supported). We transition to this state when method tracing has started or when the
// debugger was attached and transition back to NonDebuggable once the tracing has stopped /
// the debugger agent has detached..
// The runtime was started as a debuggable runtime. This allows us to support the extended set
// of debug features (for ex: redefinition). We never transition out of this state.
bool EnsurePluginLoaded(const char* plugin_name, std::string* error_msg);
bool EnsurePerfettoPlugin(std::string* error_msg);
// IsAotCompiler for compilers that don't have a running runtime. Only dex2oat currently.
bool IsAotCompiler() const {
return !UseJitCompilation() && IsCompiler();
// IsCompiler is any runtime which has a running compiler, either dex2oat or JIT.
bool IsCompiler() const {
return compiler_callbacks_ != nullptr;
// If a compiler, are we compiling a boot image?
bool IsCompilingBootImage() const;
bool CanRelocate() const;
bool ShouldRelocate() const {
return must_relocate_ && CanRelocate();
bool MustRelocateIfPossible() const {
return must_relocate_;
bool IsImageDex2OatEnabled() const {
return image_dex2oat_enabled_;
CompilerCallbacks* GetCompilerCallbacks() {
return compiler_callbacks_;
void SetCompilerCallbacks(CompilerCallbacks* callbacks) {
CHECK(callbacks != nullptr);
compiler_callbacks_ = callbacks;
bool IsZygote() const {
return is_zygote_;
bool IsPrimaryZygote() const {
return is_primary_zygote_;
bool IsSystemServer() const {
return is_system_server_;
void SetAsSystemServer() {
is_system_server_ = true;
is_zygote_ = false;
is_primary_zygote_ = false;
void SetAsZygoteChild(bool is_system_server, bool is_zygote) {
// System server should have been set earlier in SetAsSystemServer.
CHECK_EQ(is_system_server_, is_system_server);
is_zygote_ = is_zygote;
is_primary_zygote_ = false;
bool IsExplicitGcDisabled() const {
return is_explicit_gc_disabled_;
bool IsEagerlyReleaseExplicitGcDisabled() const {
return is_eagerly_release_explicit_gc_disabled_;
std::string GetCompilerExecutable() const;
const std::vector<std::string>& GetCompilerOptions() const {
return compiler_options_;
void AddCompilerOption(const std::string& option) {
const std::vector<std::string>& GetImageCompilerOptions() const {
return image_compiler_options_;
const std::vector<std::string>& GetImageLocations() const {
return image_locations_;
// Starts a runtime, which may cause threads to be started and code to run.
bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_);
EXPORT bool IsShuttingDown(Thread* self);
bool IsShuttingDownLocked() const REQUIRES(Locks::runtime_shutdown_lock_) {
return shutting_down_.load(std::memory_order_relaxed);
bool IsShuttingDownUnsafe() const {
return shutting_down_.load(std::memory_order_relaxed);
void SetShuttingDown() REQUIRES(Locks::runtime_shutdown_lock_) {, std::memory_order_relaxed);
size_t NumberOfThreadsBeingBorn() const REQUIRES(Locks::runtime_shutdown_lock_) {
return threads_being_born_;
void StartThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) {
EXPORT void EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_);
bool IsStarted() const {
return started_;
bool IsFinishedStarting() const {
return finished_starting_;
EXPORT void RunRootClinits(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_);
static Runtime* Current() {
return instance_;
// Set the current runtime to be the given instance.
// Note that this function is not responsible for cleaning up the old instance or taking the
// ownership of the new instance.
// For test use only.
static void TestOnlySetCurrent(Runtime* instance) { instance_ = instance; }
// Set whichever abort message locations are appropriate to copies of the argument. Used by
// Abort() and Thread::AbortInThis().
static void SetAbortMessage(const char* msg) REQUIRES(!Locks::abort_lock_);
// Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most
// callers should prefer.
NO_RETURN EXPORT static void Abort(const char* msg) REQUIRES(!Locks::abort_lock_);
// Returns the "main" ThreadGroup, used when attaching user threads.
jobject GetMainThreadGroup() const;
// Returns the "system" ThreadGroup, used when attaching our internal threads.
EXPORT jobject GetSystemThreadGroup() const;
// Returns the system ClassLoader which represents the CLASSPATH.
EXPORT jobject GetSystemClassLoader() const;
// Attaches the calling native thread to the runtime.
EXPORT bool AttachCurrentThread(const char* thread_name,
bool as_daemon,
jobject thread_group,
bool create_peer,
bool should_run_callbacks = true);
EXPORT void CallExitHook(jint status);
// Detaches the current native thread from the runtime.
void DetachCurrentThread(bool should_run_callbacks = true) REQUIRES(!Locks::mutator_lock_);
// If we are handling SIQQUIT return the time when we received it.
std::optional<uint64_t> SiqQuitNanoTime() const;
void DumpDeoptimizations(std::ostream& os);
void DumpForSigQuit(std::ostream& os);
void DumpLockHolders(std::ostream& os);
EXPORT ~Runtime();
const std::vector<std::string>& GetBootClassPath() const {
return boot_class_path_;
const std::vector<std::string>& GetBootClassPathLocations() const {
DCHECK(boot_class_path_locations_.empty() ||
boot_class_path_locations_.size() == boot_class_path_.size());
return boot_class_path_locations_.empty() ? boot_class_path_ : boot_class_path_locations_;
// Dynamically adds an element to boot class path.
EXPORT void AppendToBootClassPath(
const std::string& filename,
const std::string& location,
const std::vector<std::unique_ptr<const art::DexFile>>& dex_files);
// Same as above, but takes raw pointers.
EXPORT void AppendToBootClassPath(const std::string& filename,
const std::string& location,
const std::vector<const art::DexFile*>& dex_files);
// Same as above, but also takes a dex cache for each dex file.
EXPORT void AppendToBootClassPath(
const std::string& filename,
const std::string& location,
const std::vector<std::pair<const art::DexFile*, ObjPtr<mirror::DexCache>>>&
// Dynamically adds an element to boot class path and takes ownership of the dex files.
EXPORT void AddExtraBootDexFiles(const std::string& filename,
const std::string& location,
std::vector<std::unique_ptr<const art::DexFile>>&& dex_files);
ArrayRef<File> GetBootClassPathFiles() { return ArrayRef<File>(boot_class_path_files_); }
ArrayRef<File> GetBootClassPathImageFiles() {
return ArrayRef<File>(boot_class_path_image_files_);
ArrayRef<File> GetBootClassPathVdexFiles() { return ArrayRef<File>(boot_class_path_vdex_files_); }
ArrayRef<File> GetBootClassPathOatFiles() { return ArrayRef<File>(boot_class_path_oat_files_); }
// Returns the checksums for the boot image, extensions and extra boot class path dex files,
// based on the image spaces and boot class path dex files loaded in memory.
const std::string& GetBootClassPathChecksums() const {
return boot_class_path_checksums_;
const std::string& GetClassPathString() const {
return class_path_string_;
ClassLinker* GetClassLinker() const {
return class_linker_;
jni::SmallLrtAllocator* GetSmallLrtAllocator() const {
return small_lrt_allocator_;
jni::JniIdManager* GetJniIdManager() const {
return jni_id_manager_.get();
size_t GetDefaultStackSize() const {
return default_stack_size_;
unsigned int GetFinalizerTimeoutMs() const {
return finalizer_timeout_ms_;
gc::Heap* GetHeap() const {
return heap_;
InternTable* GetInternTable() const {
DCHECK(intern_table_ != nullptr);
return intern_table_;
JavaVMExt* GetJavaVM() const {
return java_vm_.get();
size_t GetMaxSpinsBeforeThinLockInflation() const {
return max_spins_before_thin_lock_inflation_;
MonitorList* GetMonitorList() const {
return monitor_list_;
MonitorPool* GetMonitorPool() const {
return monitor_pool_;
// Is the given object the special object used to mark a cleared JNI weak global?
bool IsClearedJniWeakGlobal(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_);
// Get the special object used to mark a cleared JNI weak global.
mirror::Object* GetClearedJniWeakGlobal() REQUIRES_SHARED(Locks::mutator_lock_);
EXPORT mirror::Throwable* GetPreAllocatedOutOfMemoryErrorWhenThrowingException()
EXPORT mirror::Throwable* GetPreAllocatedOutOfMemoryErrorWhenThrowingOOME()
EXPORT mirror::Throwable* GetPreAllocatedOutOfMemoryErrorWhenHandlingStackOverflow()
EXPORT mirror::Throwable* GetPreAllocatedNoClassDefFoundError()
const std::vector<std::string>& GetProperties() const {
return properties_;
ThreadList* GetThreadList() const {
return thread_list_;
static const char* GetVersion() {
return "2.1.0";
bool IsMethodHandlesEnabled() const {
return true;
void DisallowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_);
void AllowNewSystemWeaks() REQUIRES_SHARED(Locks::mutator_lock_);
// broadcast_for_checkpoint is true when we broadcast for making blocking threads to respond to
// checkpoint requests. It's false when we broadcast to unblock blocking threads after system weak
// access is reenabled.
void BroadcastForNewSystemWeaks(bool broadcast_for_checkpoint = false);
// Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If
// clean_dirty is true then dirty roots will be marked as non-dirty after visiting.
EXPORT void VisitRoots(RootVisitor* visitor, VisitRootFlags flags = kVisitRootFlagAllRoots)
REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_)
// Visit image roots, only used for hprof since the GC uses the image space mod union table
// instead.
EXPORT void VisitImageRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
// Visit all of the roots we can safely visit concurrently.
void VisitConcurrentRoots(RootVisitor* visitor,
VisitRootFlags flags = kVisitRootFlagAllRoots)
REQUIRES(!Locks::classlinker_classes_lock_, !Locks::trace_lock_)
// Visit all of the non thread roots, we can do this with mutators unpaused.
void VisitNonThreadRoots(RootVisitor* visitor)
void VisitTransactionRoots(RootVisitor* visitor)
// Sweep system weaks, the system weak is deleted if the visitor return null. Otherwise, the
// system weak is updated to be the visitor's returned value.
EXPORT void SweepSystemWeaks(IsMarkedVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
// Walk all reflective objects and visit their targets as well as any method/fields held by the
// runtime threads that are marked as being reflective.
EXPORT void VisitReflectiveTargets(ReflectiveValueVisitor* visitor)
// Helper for visiting reflective targets with lambdas for both field and method reflective
// targets.
template <typename FieldVis, typename MethodVis>
void VisitReflectiveTargets(FieldVis&& fv, MethodVis&& mv) REQUIRES(Locks::mutator_lock_) {
FunctionReflectiveValueVisitor frvv(fv, mv);
// Returns a special method that calls into a trampoline for runtime method resolution
ArtMethod* GetResolutionMethod();
bool HasResolutionMethod() const {
return resolution_method_ != nullptr;
void SetResolutionMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_);
void ClearResolutionMethod() {
resolution_method_ = nullptr;
ArtMethod* CreateResolutionMethod() REQUIRES_SHARED(Locks::mutator_lock_);
// Returns a special method that calls into a trampoline for runtime imt conflicts.
ArtMethod* GetImtConflictMethod();
ArtMethod* GetImtUnimplementedMethod();
bool HasImtConflictMethod() const {
return imt_conflict_method_ != nullptr;
void ClearImtConflictMethod() {
imt_conflict_method_ = nullptr;
void FixupConflictTables() REQUIRES_SHARED(Locks::mutator_lock_);
void SetImtConflictMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_);
void SetImtUnimplementedMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_);
ArtMethod* CreateImtConflictMethod(LinearAlloc* linear_alloc)
void ClearImtUnimplementedMethod() {
imt_unimplemented_method_ = nullptr;
bool HasCalleeSaveMethod(CalleeSaveType type) const {
return callee_save_methods_[static_cast<size_t>(type)] != 0u;
ArtMethod* GetCalleeSaveMethod(CalleeSaveType type)
ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type)
QuickMethodFrameInfo GetRuntimeMethodFrameInfo(ArtMethod* method)
static constexpr size_t GetCalleeSaveMethodOffset(CalleeSaveType type) {
return OFFSETOF_MEMBER(Runtime, callee_save_methods_[static_cast<size_t>(type)]);
static constexpr MemberOffset GetInstrumentationOffset() {
return MemberOffset(OFFSETOF_MEMBER(Runtime, instrumentation_));
InstructionSet GetInstructionSet() const {
return instruction_set_;
EXPORT void SetInstructionSet(InstructionSet instruction_set);
void ClearInstructionSet();
EXPORT void SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type);
void ClearCalleeSaveMethods();
EXPORT ArtMethod* CreateCalleeSaveMethod() REQUIRES_SHARED(Locks::mutator_lock_);
uint64_t GetStat(int kind);
RuntimeStats* GetStats() {
return &stats_;
bool HasStatsEnabled() const {
return stats_enabled_;
void ResetStats(int kinds);
void SetStatsEnabled(bool new_state)
REQUIRES(!Locks::instrument_entrypoints_lock_, !Locks::mutator_lock_);
enum class NativeBridgeAction { // private
jit::Jit* GetJit() const {
return jit_.get();
jit::JitCodeCache* GetJitCodeCache() const {
return jit_code_cache_.get();
// Returns true if JIT compilations are enabled. GetJit() will be not null in this case.
EXPORT bool UseJitCompilation() const;
void PreZygoteFork();
void PostZygoteFork();
void InitNonZygoteOrPostFork(
JNIEnv* env,
bool is_system_server,
bool is_child_zygote,
NativeBridgeAction action,
const char* isa,
bool profile_system_server = false);
const instrumentation::Instrumentation* GetInstrumentation() const {
return &instrumentation_;
instrumentation::Instrumentation* GetInstrumentation() {
return &instrumentation_;
void RegisterAppInfo(const std::string& package_name,
const std::vector<std::string>& code_paths,
const std::string& profile_output_filename,
const std::string& ref_profile_filename,
int32_t code_type);
// Transaction support.
EXPORT bool IsActiveTransaction() const;
// EnterTransactionMode may suspend.
EXPORT void EnterTransactionMode(bool strict, mirror::Class* root)
EXPORT void ExitTransactionMode();
EXPORT void RollbackAllTransactions() REQUIRES_SHARED(Locks::mutator_lock_);
// Transaction rollback and exit transaction are always done together, it's convenience to
// do them in one function.
void RollbackAndExitTransactionMode() REQUIRES_SHARED(Locks::mutator_lock_);
bool IsTransactionAborted() const;
const Transaction* GetTransaction() const;
Transaction* GetTransaction();
bool IsActiveStrictTransactionMode() const;
void AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message)
void ThrowTransactionAbortError(Thread* self)
void RecordWriteFieldBoolean(mirror::Object* obj,
MemberOffset field_offset,
uint8_t value,
bool is_volatile);
void RecordWriteFieldByte(mirror::Object* obj,
MemberOffset field_offset,
int8_t value,
bool is_volatile);
void RecordWriteFieldChar(mirror::Object* obj,
MemberOffset field_offset,
uint16_t value,
bool is_volatile);
void RecordWriteFieldShort(mirror::Object* obj,
MemberOffset field_offset,
int16_t value,
bool is_volatile);
EXPORT void RecordWriteField32(mirror::Object* obj,
MemberOffset field_offset,
uint32_t value,
bool is_volatile);
void RecordWriteField64(mirror::Object* obj,
MemberOffset field_offset,
uint64_t value,
bool is_volatile);
EXPORT void RecordWriteFieldReference(mirror::Object* obj,
MemberOffset field_offset,
ObjPtr<mirror::Object> value,
bool is_volatile) REQUIRES_SHARED(Locks::mutator_lock_);
EXPORT void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value)
void RecordStrongStringInsertion(ObjPtr<mirror::String> s)
void RecordWeakStringInsertion(ObjPtr<mirror::String> s)
void RecordStrongStringRemoval(ObjPtr<mirror::String> s)
void RecordWeakStringRemoval(ObjPtr<mirror::String> s)
void RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, dex::StringIndex string_idx)
void RecordResolveMethodType(ObjPtr<mirror::DexCache> dex_cache, dex::ProtoIndex proto_idx)
void SetFaultMessage(const std::string& message);
void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const;
bool GetImplicitStackOverflowChecks() const {
return implicit_so_checks_;
bool GetImplicitSuspendChecks() const {
return implicit_suspend_checks_;
bool GetImplicitNullChecks() const {
return implicit_null_checks_;
void DisableVerifier();
bool IsVerificationEnabled() const;
EXPORT bool IsVerificationSoftFail() const;
void SetHiddenApiEnforcementPolicy(hiddenapi::EnforcementPolicy policy) {
hidden_api_policy_ = policy;
hiddenapi::EnforcementPolicy GetHiddenApiEnforcementPolicy() const {
return hidden_api_policy_;
void SetCorePlatformApiEnforcementPolicy(hiddenapi::EnforcementPolicy policy) {
core_platform_api_policy_ = policy;
hiddenapi::EnforcementPolicy GetCorePlatformApiEnforcementPolicy() const {
return core_platform_api_policy_;
void SetTestApiEnforcementPolicy(hiddenapi::EnforcementPolicy policy) {
test_api_policy_ = policy;
hiddenapi::EnforcementPolicy GetTestApiEnforcementPolicy() const {
return test_api_policy_;
void SetHiddenApiExemptions(const std::vector<std::string>& exemptions) {
hidden_api_exemptions_ = exemptions;
const std::vector<std::string>& GetHiddenApiExemptions() {
return hidden_api_exemptions_;
void SetDedupeHiddenApiWarnings(bool value) {
dedupe_hidden_api_warnings_ = value;
bool ShouldDedupeHiddenApiWarnings() {
return dedupe_hidden_api_warnings_;
void SetHiddenApiEventLogSampleRate(uint32_t rate) {
hidden_api_access_event_log_rate_ = rate;
uint32_t GetHiddenApiEventLogSampleRate() const {
return hidden_api_access_event_log_rate_;
const std::string& GetProcessPackageName() const {
return process_package_name_;
void SetProcessPackageName(const char* package_name) {
if (package_name == nullptr) {
} else {
process_package_name_ = package_name;
const std::string& GetProcessDataDirectory() const {
return process_data_directory_;
void SetProcessDataDirectory(const char* data_dir) {
if (data_dir == nullptr) {
} else {
process_data_directory_ = data_dir;
const std::vector<std::string>& GetCpuAbilist() const {
return cpu_abilist_;
bool IsRunningOnMemoryTool() const {
return is_running_on_memory_tool_;
void SetTargetSdkVersion(uint32_t version) {
target_sdk_version_ = version;
uint32_t GetTargetSdkVersion() const {
return target_sdk_version_;
CompatFramework& GetCompatFramework() {
return compat_framework_;
uint32_t GetZygoteMaxFailedBoots() const {
return zygote_max_failed_boots_;
bool AreExperimentalFlagsEnabled(ExperimentalFlags flags) {
return (experimental_flags_ & flags) != ExperimentalFlags::kNone;
void CreateJitCodeCache(bool rwx_memory_allowed);
// Create the JIT and instrumentation and code cache.
void CreateJit();
ArenaPool* GetLinearAllocArenaPool() {
return linear_alloc_arena_pool_.get();
ArenaPool* GetArenaPool() {
return arena_pool_.get();
const ArenaPool* GetArenaPool() const {
return arena_pool_.get();
ArenaPool* GetJitArenaPool() {
return jit_arena_pool_.get();
EXPORT void ReclaimArenaPoolMemory();
LinearAlloc* GetLinearAlloc() {
return linear_alloc_.get();
LinearAlloc* GetStartupLinearAlloc() {
return startup_linear_alloc_.load(std::memory_order_relaxed);
jit::JitOptions* GetJITOptions() {
return jit_options_.get();
bool IsJavaDebuggable() const {
return runtime_debug_state_ == RuntimeDebugState::kJavaDebuggable ||
runtime_debug_state_ == RuntimeDebugState::kJavaDebuggableAtInit;
bool IsJavaDebuggableAtInit() const {
return runtime_debug_state_ == RuntimeDebugState::kJavaDebuggableAtInit;
void SetProfileableFromShell(bool value) {
is_profileable_from_shell_ = value;
bool IsProfileableFromShell() const {
return is_profileable_from_shell_;
void SetProfileable(bool value) {
is_profileable_ = value;
bool IsProfileable() const {
return is_profileable_;
EXPORT void SetRuntimeDebugState(RuntimeDebugState state);
// Deoptimize the boot image, called for Java debuggable apps.
EXPORT void DeoptimizeBootImage() REQUIRES(Locks::mutator_lock_);
bool IsNativeDebuggable() const {
return is_native_debuggable_;
void SetNativeDebuggable(bool value) {
is_native_debuggable_ = value;
void SetSignalHookDebuggable(bool value);
bool AreNonStandardExitsEnabled() const {
return non_standard_exits_enabled_;
void SetNonStandardExitsEnabled() {
non_standard_exits_enabled_ = true;
bool AreAsyncExceptionsThrown() const {
return async_exceptions_thrown_;
void SetAsyncExceptionsThrown() {
async_exceptions_thrown_ = true;
// Returns the build fingerprint, if set. Otherwise an empty string is returned.
std::string GetFingerprint() {
return fingerprint_;
// Called from class linker.
void SetSentinel(ObjPtr<mirror::Object> sentinel) REQUIRES_SHARED(Locks::mutator_lock_);
// For testing purpose only.
// TODO: Remove this when this is no longer needed (b/116087961).
EXPORT GcRoot<mirror::Object> GetSentinel() REQUIRES_SHARED(Locks::mutator_lock_);
// Use a sentinel for marking entries in a table that have been cleared.
// This helps diagnosing in case code tries to wrongly access such
// entries.
static mirror::Class* GetWeakClassSentinel() {
return reinterpret_cast<mirror::Class*>(0xebadbeef);
// Create a normal LinearAlloc or low 4gb version if we are 64 bit AOT compiler.
EXPORT LinearAlloc* CreateLinearAlloc();
// Setup linear-alloc allocators to stop using the current arena so that the
// next allocations, which would be after zygote fork, happens in userfaultfd
// visited space.
void SetupLinearAllocForPostZygoteFork(Thread* self)
REQUIRES(!Locks::mutator_lock_, !Locks::classlinker_classes_lock_);
OatFileManager& GetOatFileManager() const {
DCHECK(oat_file_manager_ != nullptr);
return *oat_file_manager_;
double GetHashTableMinLoadFactor() const;
double GetHashTableMaxLoadFactor() const;
bool IsSafeMode() const {
return safe_mode_;
void SetSafeMode(bool mode) {
safe_mode_ = mode;
bool GetDumpNativeStackOnSigQuit() const {
return dump_native_stack_on_sig_quit_;
EXPORT void UpdateProcessState(ProcessState process_state);
// Returns true if we currently care about long mutator pause.
bool InJankPerceptibleProcessState() const {
return process_state_ == kProcessStateJankPerceptible;
void RegisterSensitiveThread() const;
void SetZygoteNoThreadSection(bool val) {
zygote_no_threads_ = val;
bool IsZygoteNoThreadSection() const {
return zygote_no_threads_;
// Returns if the code can be deoptimized asynchronously. Code may be compiled with some
// optimization that makes it impossible to deoptimize.
EXPORT bool IsAsyncDeoptimizeable(ArtMethod* method, uintptr_t code) const
// Returns a saved copy of the environment (getenv/setenv values).
// Used by Fork to protect against overwriting LD_LIBRARY_PATH, etc.
char** GetEnvSnapshot() const {
return env_snapshot_.GetSnapshot();
EXPORT void AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder);
EXPORT void RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder);
EXPORT void AttachAgent(JNIEnv* env, const std::string& agent_arg, jobject class_loader);
const std::list<std::unique_ptr<ti::Agent>>& GetAgents() const {
return agents_;
EXPORT RuntimeCallbacks* GetRuntimeCallbacks();
bool HasLoadedPlugins() const {
return !plugins_.empty();
void InitThreadGroups(Thread* self);
void SetDumpGCPerformanceOnShutdown(bool value) {
dump_gc_performance_on_shutdown_ = value;
bool GetDumpGCPerformanceOnShutdown() const {
return dump_gc_performance_on_shutdown_;
void IncrementDeoptimizationCount(DeoptimizationKind kind) {
DCHECK_LE(kind, DeoptimizationKind::kLast);
uint32_t GetNumberOfDeoptimizations() const {
uint32_t result = 0;
for (size_t i = 0; i <= static_cast<size_t>(DeoptimizationKind::kLast); ++i) {
result += deoptimization_counts_[i];
return result;
bool DenyArtApexDataFiles() const {
return deny_art_apex_data_files_;
size_t GetMadviseWillNeedTotalDexSize() const {
return madvise_willneed_total_dex_size_;
size_t GetMadviseWillNeedSizeOdex() const {
return madvise_willneed_odex_filesize_;
size_t GetMadviseWillNeedSizeArt() const {
return madvise_willneed_art_filesize_;
const std::string& GetJdwpOptions() {
return jdwp_options_;
JdwpProvider GetJdwpProvider() const {
return jdwp_provider_;
JniIdType GetJniIdType() const {
return jni_ids_indirection_;
bool CanSetJniIdType() const {
return GetJniIdType() == JniIdType::kSwapablePointer;
// Changes the JniIdType to the given type. Only allowed if CanSetJniIdType(). All threads must be
// suspended to call this function.
EXPORT void SetJniIdType(JniIdType t);
uint32_t GetVerifierLoggingThresholdMs() const {
return verifier_logging_threshold_ms_;
// Atomically delete the thread pool if the reference count is 0.
bool DeleteThreadPool() REQUIRES(!Locks::runtime_thread_pool_lock_);
// Wait for all the thread workers to be attached.
void WaitForThreadPoolWorkersToStart() REQUIRES(!Locks::runtime_thread_pool_lock_);
// Scoped usage of the runtime thread pool. Prevents the pool from being
// deleted. Note that the thread pool is only for startup and gets deleted after.
class ScopedThreadPoolUsage {
// Return the thread pool.
ThreadPool* GetThreadPool() const {
return thread_pool_;
ThreadPool* const thread_pool_;
LinearAlloc* ReleaseStartupLinearAlloc() {
return, std::memory_order_relaxed);
bool LoadAppImageStartupCache() const {
return load_app_image_startup_cache_;
void SetLoadAppImageStartupCacheEnabled(bool enabled) {
load_app_image_startup_cache_ = enabled;
// Reset the startup completed status so that we can call NotifyStartupCompleted again. Should
// only be used for testing.
EXPORT void ResetStartupCompleted();
// Notify the runtime that application startup is considered completed. Only has effect for the
// first call. Returns whether this was the first call.
bool NotifyStartupCompleted();
// Notify the runtime that the application finished loading some dex/odex files. This is
// called everytime we load a set of dex files in a class loader.
void NotifyDexFileLoaded();
// Return true if startup is already completed.
EXPORT bool GetStartupCompleted() const;
bool IsVerifierMissingKThrowFatal() const {
return verifier_missing_kthrow_fatal_;
bool IsJavaZygoteForkLoopRequired() const {
return force_java_zygote_fork_loop_;
bool IsPerfettoHprofEnabled() const {
return perfetto_hprof_enabled_;
bool IsPerfettoJavaHeapStackProfEnabled() const {
return perfetto_javaheapprof_enabled_;
bool IsMonitorTimeoutEnabled() const {
return monitor_timeout_enable_;
uint64_t GetMonitorTimeoutNs() const {
return monitor_timeout_ns_;
// Return whether this is system server and it is being profiled.
bool IsSystemServerProfiled() const;
// Return whether we should load oat files as executable or not.
bool GetOatFilesExecutable() const;
metrics::ArtMetrics* GetMetrics() { return &metrics_; }
AppInfo* GetAppInfo() { return &app_info_; }
void RequestMetricsReport(bool synchronous = true);
static void MadviseFileForRange(size_t madvise_size_limit_bytes,
size_t map_size_bytes,
const uint8_t* map_begin,
const uint8_t* map_end,
const std::string& file_name);
const std::string& GetApexVersions() const {
return apex_versions_;
// Return whether a boot image has a profile. This means it's an in-memory
// image rather that an image loaded from disk.
bool HasImageWithProfile() const;
bool GetNoSigChain() const {
return no_sig_chain_;
void AddGeneratedCodeRange(const void* start, size_t size);
void RemoveGeneratedCodeRange(const void* start, size_t size)
// Trigger a flag reload from system properties or device congfigs.
// Should only be called from runtime init and zygote post fork as
// we don't want to change the runtime config midway during execution.
// The caller argument should be the name of the function making this call
// and will be used to enforce the appropriate names.
// See Flags::ReloadAllFlags as well.
static void ReloadAllFlags(const std::string& caller);
// Parses /apex/apex-info-list.xml to build a string containing apex versions of boot classpath
// jars, which is encoded into .oat files.
static std::string GetApexVersions(ArrayRef<const std::string> boot_class_path_locations);
bool AllowInMemoryCompilation() const { return allow_in_memory_compilation_; }
// Used by plugin code to attach a hook for OOME.
void SetOutOfMemoryErrorHook(void (*hook)()) {
out_of_memory_error_hook_ = hook;
void OutOfMemoryErrorHook() {
if (out_of_memory_error_hook_ != nullptr) {
static void InitPlatformSignalHandlers();
bool HandlesSignalsInCompiledCode() const {
return !no_sig_chain_ &&
(implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_);
void BlockSignals();
bool Init(RuntimeArgumentMap&& runtime_options)
SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_);
void InitNativeMethods() REQUIRES(!Locks::mutator_lock_);
void RegisterRuntimeNativeMethods(JNIEnv* env);
void InitMetrics();
void StartDaemonThreads() REQUIRES_SHARED(Locks::mutator_lock_);
void StartSignalCatcher();
void MaybeSaveJitProfilingInfo();
// Visit all of the thread roots.
void VisitThreadRoots(RootVisitor* visitor, VisitRootFlags flags)
// Visit all other roots which must be done with mutators suspended.
void VisitNonConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags)
// Constant roots are the roots which never change after the runtime is initialized, they only
// need to be visited once per GC cycle.
void VisitConstantRoots(RootVisitor* visitor)
// Note: To be lock-free, GetFaultMessage temporarily replaces the lock message with null.
// As such, there is a window where a call will return an empty string. In general,
// only aborting code should retrieve this data (via GetFaultMessageForAbortLogging
// friend).
std::string GetFaultMessage();
ThreadPool* AcquireThreadPool() REQUIRES(!Locks::runtime_thread_pool_lock_);
void ReleaseThreadPool() REQUIRES(!Locks::runtime_thread_pool_lock_);
// Caches the apex versions produced by `GetApexVersions`.
void InitializeApexVersions();
void AppendToBootClassPath(const std::string& filename, const std::string& location);
// Don't use EXPORT ("default" visibility), because quick_entrypoints_x86.o
// refers to this symbol and it can't link with R_386_PC32 relocation.
// A pointer to the active runtime or null.
LIBART_PROTECTED static Runtime* instance_;
// NOTE: these must match the gc::ProcessState values as they come directly from the framework.
static constexpr int kProfileForground = 0;
static constexpr int kProfileBackground = 1;
static constexpr uint32_t kCalleeSaveSize = 6u;
// 64 bit so that we can share the same asm offsets for both 32 and 64 bits.
uint64_t callee_save_methods_[kCalleeSaveSize];
// Pre-allocated exceptions (see Runtime::Init).
GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_when_throwing_exception_;
GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_when_throwing_oome_;
GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_when_handling_stack_overflow_;
GcRoot<mirror::Throwable> pre_allocated_NoClassDefFoundError_;
ArtMethod* resolution_method_;
ArtMethod* imt_conflict_method_;
// Unresolved method has the same behavior as the conflict method, it is used by the class linker
// for differentiating between unfilled imt slots vs conflict slots in superclasses.
ArtMethod* imt_unimplemented_method_;
// Special sentinel object used to invalid conditions in JNI (cleared weak references) and
// JDWP (invalid references).
GcRoot<mirror::Object> sentinel_;
InstructionSet instruction_set_;
CompilerCallbacks* compiler_callbacks_;
bool is_zygote_;
bool is_primary_zygote_;
bool is_system_server_;
bool must_relocate_;
bool is_concurrent_gc_enabled_;
bool is_explicit_gc_disabled_;
bool is_eagerly_release_explicit_gc_disabled_;
bool image_dex2oat_enabled_;
std::string compiler_executable_;
std::vector<std::string> compiler_options_;
std::vector<std::string> image_compiler_options_;
std::vector<std::string> image_locations_;
std::vector<std::string> boot_class_path_;
std::vector<std::string> boot_class_path_locations_;
std::string boot_class_path_checksums_;
std::vector<File> boot_class_path_files_;
std::vector<File> boot_class_path_image_files_;
std::vector<File> boot_class_path_vdex_files_;
std::vector<File> boot_class_path_oat_files_;
std::string class_path_string_;
std::vector<std::string> properties_;
std::list<ti::AgentSpec> agent_specs_;
std::list<std::unique_ptr<ti::Agent>> agents_;
std::vector<Plugin> plugins_;
// The default stack size for managed threads created by the runtime.
size_t default_stack_size_;
// Finalizers running for longer than this many milliseconds abort the runtime.
unsigned int finalizer_timeout_ms_;
gc::Heap* heap_;
std::unique_ptr<ArenaPool> jit_arena_pool_;
std::unique_ptr<ArenaPool> arena_pool_;
// This pool is used for linear alloc if we are using userfaultfd GC, or if
// low 4gb pool is required for compiler linear alloc. Otherwise, use
// arena_pool_.
// We need ArtFields to be in low 4gb if we are compiling using a 32 bit image
// on a 64 bit compiler in case we resolve things in the image since the field
// arrays are int arrays in this case.
std::unique_ptr<ArenaPool> linear_alloc_arena_pool_;
// Shared linear alloc for now.
std::unique_ptr<LinearAlloc> linear_alloc_;
// Linear alloc used for allocations during startup. Will be deleted after
// startup. Atomic because the pointer can be concurrently updated to null.
std::atomic<LinearAlloc*> startup_linear_alloc_;
// The number of spins that are done before thread suspension is used to forcibly inflate.
size_t max_spins_before_thin_lock_inflation_;
MonitorList* monitor_list_;
MonitorPool* monitor_pool_;
ThreadList* thread_list_;
InternTable* intern_table_;
ClassLinker* class_linker_;
SignalCatcher* signal_catcher_;
jni::SmallLrtAllocator* small_lrt_allocator_;
std::unique_ptr<jni::JniIdManager> jni_id_manager_;
std::unique_ptr<JavaVMExt> java_vm_;
std::unique_ptr<jit::Jit> jit_;
std::unique_ptr<jit::JitCodeCache> jit_code_cache_;
std::unique_ptr<jit::JitOptions> jit_options_;
// Runtime thread pool. The pool is only for startup and gets deleted after.
std::unique_ptr<ThreadPool> thread_pool_ GUARDED_BY(Locks::runtime_thread_pool_lock_);
size_t thread_pool_ref_count_ GUARDED_BY(Locks::runtime_thread_pool_lock_);
// Fault message, printed when we get a SIGSEGV. Stored as a native-heap object and accessed
// lock-free, so needs to be atomic.
std::atomic<std::string*> fault_message_;
// A non-zero value indicates that a thread has been created but not yet initialized. Guarded by
// the shutdown lock so that threads aren't born while we're shutting down.
size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_);
// Waited upon until no threads are being born.
std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_);
// Set when runtime shutdown is past the point that new threads may attach. Usually
// GUARDED_BY(Locks::runtime_shutdown_lock_). But we need to check it in Abort without the
// lock, because we may already own it.
std::atomic<bool> shutting_down_;
// The runtime is starting to shutdown but is blocked waiting on shutdown_cond_.
bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_);
bool started_;
// New flag added which tells us if the runtime has finished starting. If
// this flag is set then the Daemon threads are created and the class loader
// is created. This flag is needed for knowing if its safe to request CMS.
bool finished_starting_;
// Hooks supported by JNI_CreateJavaVM
jint (*vfprintf_)(FILE* stream, const char* format, va_list ap);
void (*exit_)(jint status);
void (*abort_)();
bool stats_enabled_;
RuntimeStats stats_;
const bool is_running_on_memory_tool_;
std::unique_ptr<TraceConfig> trace_config_;
instrumentation::Instrumentation instrumentation_;
jobject main_thread_group_;
jobject system_thread_group_;
// As returned by ClassLoader.getSystemClassLoader().
jobject system_class_loader_;
// If true, then we dump the GC cumulative timings on shutdown.
bool dump_gc_performance_on_shutdown_;
// Transactions used for pre-initializing classes at compilation time.
// Support nested transactions, maintain a list containing all transactions. Transactions are
// handled under a stack discipline. Because GC needs to go over all transactions, we choose list
// as substantial data structure instead of stack.
std::forward_list<Transaction> preinitialization_transactions_;
// If kNone, verification is disabled. kEnable by default.
verifier::VerifyMode verify_;
// List of supported cpu abis.
std::vector<std::string> cpu_abilist_;
// Specifies target SDK version to allow workarounds for certain API levels.
uint32_t target_sdk_version_;
// ART counterpart for the compat framework (go/compat-framework).
CompatFramework compat_framework_;
// Implicit checks flags.
bool implicit_null_checks_; // NullPointer checks are implicit.
bool implicit_so_checks_; // StackOverflow checks are implicit.
bool implicit_suspend_checks_; // Thread suspension checks are implicit.
// Whether or not the sig chain (and implicitly the fault handler) should be
// disabled. Tools like dex2oat don't need them. This enables
// building a statically link version of dex2oat.
bool no_sig_chain_;
// Force the use of native bridge even if the app ISA matches the runtime ISA.
bool force_native_bridge_;
// Whether or not a native bridge has been loaded.
// The native bridge allows running native code compiled for a foreign ISA. The way it works is,
// if standard dlopen fails to load native library associated with native activity, it calls to
// the native bridge to load it and then gets the trampoline for the entry to native activity.
// The option 'native_bridge_library_filename' specifies the name of the native bridge.
// When non-empty the native bridge will be loaded from the given file. An empty value means
// that there's no native bridge.
bool is_native_bridge_loaded_;
// Whether we are running under native debugger.
bool is_native_debuggable_;
// whether or not any async exceptions have ever been thrown. This is used to speed up the
// MterpShouldSwitchInterpreters function.
bool async_exceptions_thrown_;
// Whether anything is going to be using the shadow-frame APIs to force a function to return
// early. Doing this requires that (1) we be debuggable and (2) that mterp is exited.
bool non_standard_exits_enabled_;
// Whether Java code needs to be debuggable.
RuntimeDebugState runtime_debug_state_;
bool monitor_timeout_enable_;
uint64_t monitor_timeout_ns_;
// Whether or not this application can be profiled by the shell user,
// even when running on a device that is running in user mode.
bool is_profileable_from_shell_ = false;
// Whether or not this application can be profiled by system services on a
// device running in user mode, but not necessarily by the shell user.
bool is_profileable_ = false;
// The maximum number of failed boots we allow before pruning the dalvik cache
// and trying again. This option is only inspected when we're running as a
// zygote.
uint32_t zygote_max_failed_boots_;
// Enable experimental opcodes that aren't fully specified yet. The intent is to
// eventually publish them as public-usable opcodes, but they aren't ready yet.
// Experimental opcodes should not be used by other production code.
ExperimentalFlags experimental_flags_;
// Contains the build fingerprint, if given as a parameter.
std::string fingerprint_;
// Oat file manager, keeps track of what oat files are open.
OatFileManager* oat_file_manager_;
// Whether or not we are on a low RAM device.
bool is_low_memory_mode_;
// Limiting size (in bytes) for applying MADV_WILLNEED on vdex files
// or uncompressed dex files in APKs.
// A 0 for this will turn off madvising to MADV_WILLNEED
size_t madvise_willneed_total_dex_size_;
// Limiting size (in bytes) for applying MADV_WILLNEED on odex files
// A 0 for this will turn off madvising to MADV_WILLNEED
size_t madvise_willneed_odex_filesize_;
// Limiting size (in bytes) for applying MADV_WILLNEED on art files
// A 0 for this will turn off madvising to MADV_WILLNEED
size_t madvise_willneed_art_filesize_;
// Whether the application should run in safe mode, that is, interpreter only.
bool safe_mode_;
// Whether access checks on hidden API should be performed.
hiddenapi::EnforcementPolicy hidden_api_policy_;
// Whether access checks on core platform API should be performed.
hiddenapi::EnforcementPolicy core_platform_api_policy_;
// Whether access checks on test API should be performed.
hiddenapi::EnforcementPolicy test_api_policy_;
// List of signature prefixes of methods that have been removed from the blocklist, and treated
// as if SDK.
std::vector<std::string> hidden_api_exemptions_;
// Do not warn about the same hidden API access violation twice.
// This is only used for testing.
bool dedupe_hidden_api_warnings_;
// How often to log hidden API access to the event log. An integer between 0
// (never) and 0x10000 (always).
uint32_t hidden_api_access_event_log_rate_;
// The package of the app running in this process.
std::string process_package_name_;
// The data directory of the app running in this process.
std::string process_data_directory_;
// Whether threads should dump their native stack on SIGQUIT.
bool dump_native_stack_on_sig_quit_;
// Whether or not we currently care about pause times.
ProcessState process_state_;
// Whether zygote code is in a section that should not start threads.
bool zygote_no_threads_;
// The string containing requested jdwp options
std::string jdwp_options_;
// The jdwp provider we were configured with.
JdwpProvider jdwp_provider_;
// True if jmethodID and jfieldID are opaque Indices. When false (the default) these are simply
// pointers. This is set by -Xopaque-jni-ids:{true,false}.
JniIdType jni_ids_indirection_;
// Set to false in cases where we want to directly control when jni-id
// indirection is changed. This is intended only for testing JNI id swapping.
bool automatically_set_jni_ids_indirection_;
// True if files in /data/misc/apexdata/ are considered untrustworthy.
bool deny_art_apex_data_files_;
// Whether to allow compiling the boot classpath in memory when the given boot image is unusable.
bool allow_in_memory_compilation_ = false;
// Saved environment.
class EnvSnapshot {
EnvSnapshot() = default;
void TakeSnapshot();
char** GetSnapshot() const;
std::unique_ptr<char*[]> c_env_vector_;
std::vector<std::unique_ptr<std::string>> name_value_pairs_;
} env_snapshot_;
// Generic system-weak holders.
std::vector<gc::AbstractSystemWeakHolder*> system_weak_holders_;
std::unique_ptr<RuntimeCallbacks> callbacks_;
std::atomic<uint32_t> deoptimization_counts_[
static_cast<uint32_t>(DeoptimizationKind::kLast) + 1];
MemMap protected_fault_page_;
uint32_t verifier_logging_threshold_ms_;
bool load_app_image_startup_cache_ = false;
// If startup has completed, must happen at most once.
std::atomic<bool> startup_completed_ = false;
bool verifier_missing_kthrow_fatal_;
bool force_java_zygote_fork_loop_;
bool perfetto_hprof_enabled_;
bool perfetto_javaheapprof_enabled_;
// Called on out of memory error
void (*out_of_memory_error_hook_)();
metrics::ArtMetrics metrics_;
std::unique_ptr<metrics::MetricsReporter> metrics_reporter_;
// Apex versions of boot classpath jars concatenated in a string. The format
// is of the type:
// '/apex1_version/apex2_version//'
// When the apex is the factory version, we don't encode it (for example in
// the third entry in the example above).
std::string apex_versions_;
// The info about the application code paths.
AppInfo app_info_;
// Note: See comments on GetFaultMessage.
friend std::string GetFaultMessageForAbortLogging();
friend class Dex2oatImageTest;
friend class ScopedThreadPoolUsage;
friend class OatFileAssistantTest;
class SetupLinearAllocForZygoteFork;
inline metrics::ArtMetrics* GetMetrics() { return Runtime::Current()->GetMetrics(); }
} // namespace art