// Copyright Joyent, Inc. and other Node contributors.

//

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

//

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef SRC_ENV_H_

#define SRC_ENV_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "aliased_buffer.h"

#if HAVE_INSPECTOR

#include "inspector_agent.h"

#include "inspector_profiler.h"

#endif

#include "callback_queue.h"

#include "cleanup_queue-inl.h"

#include "compile_cache.h"

#include "debug_utils.h"

#include "env_properties.h"

#include "handle_wrap.h"

#include "node.h"

#include "node_binding.h"

#include "node_builtins.h"

#include "node_exit_code.h"

#include "node_main_instance.h"

#include "node_options.h"

#include "node_perf_common.h"

#include "node_profiling.h"

#include "node_realm.h"

#include "node_snapshotable.h"

#include "permission/permission.h"

#include "req_wrap.h"

#include "util.h"

#include "uv.h"

#include "v8-external-memory-accounter.h"

#include "v8-profiler.h"

#include "v8.h"

#if HAVE_OPENSSL

#include <openssl/evp.h>

#endif

#include <array>

#include <atomic>

#include <cstdint>

#include <deque>

#include <functional>

#include <list>

#include <memory>

#include <ostream>

#include <set>

#include <string>

#include <unordered_map>

#include <unordered_set>

#include <variant>

#include <vector>

namespace node {

namespace shadow_realm {

class ShadowRealm;

}

namespace contextify {

class ContextifyScript;

class CompiledFnEntry;

}

namespace performance {

class PerformanceState;

}

namespace tracing {

class AgentWriterHandle;

}

#if HAVE_INSPECTOR

namespace profiler {

class V8CoverageConnection;

class V8CpuProfilerConnection;

class V8HeapProfilerConnection;

} // namespace profiler

namespace inspector {

class ParentInspectorHandle;

}

#endif // HAVE_INSPECTOR

namespace worker {

class Worker;

}

namespace loader {

class ModuleWrap;

} // namespace loader

class Environment;

class Realm;

struct IsolateDataSerializeInfo {

std::vector<SnapshotIndex> primitive_values;

std::vector<PropInfo> template_values;

friend std::ostream& operator<<(std::ostream& o,

const IsolateDataSerializeInfo& i);

};

struct PerIsolateWrapperData {

uint16_t cppgc_id;

uint16_t non_cppgc_id;

};

class NODE_EXTERN_PRIVATE IsolateData : public MemoryRetainer {

private:

IsolateData(v8::Isolate* isolate,

uv_loop_t* event_loop,

MultiIsolatePlatform* platform,

ArrayBufferAllocator* node_allocator,

const SnapshotData* snapshot_data,

std::shared_ptr<PerIsolateOptions> options);

public:

static IsolateData* CreateIsolateData(

v8::Isolate* isolate,

uv_loop_t* event_loop,

MultiIsolatePlatform* platform = nullptr,

ArrayBufferAllocator* node_allocator = nullptr,

const EmbedderSnapshotData* embedder_snapshot_data = nullptr,

std::shared_ptr<PerIsolateOptions> options = nullptr);

~IsolateData();

SET_MEMORY_INFO_NAME(IsolateData)

SET_SELF_SIZE(IsolateData)

void MemoryInfo(MemoryTracker* tracker) const override;

IsolateDataSerializeInfo Serialize(v8::SnapshotCreator* creator);

bool is_building_snapshot() const { return snapshot_config_.has_value(); }

const SnapshotConfig* snapshot_config() const {

return snapshot_config_.has_value() ? &(snapshot_config_.value()) : nullptr;

}

void set_snapshot_config(const SnapshotConfig* config) {

if (config != nullptr) {

snapshot_config_ = *config; // Copy the config.

}

}

uint16_t* embedder_id_for_cppgc() const;

uint16_t* embedder_id_for_non_cppgc() const;

inline uv_loop_t* event_loop() const;

inline MultiIsolatePlatform* platform() const;

inline const SnapshotData* snapshot_data() const;

inline std::shared_ptr<PerIsolateOptions> options();

inline NodeArrayBufferAllocator* node_allocator() const;

inline worker::Worker* worker_context() const;

inline void set_worker_context(worker::Worker* context);

#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)

#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)

#define VS(PropertyName, StringValue) V(v8::String, PropertyName)

#define VR(PropertyName, TypeName) V(v8::Private, per_realm_##PropertyName)

#define V(TypeName, PropertyName) \

inline v8::Local<TypeName> PropertyName() const;

PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)

PER_ISOLATE_SYMBOL_PROPERTIES(VY)

PER_ISOLATE_STRING_PROPERTIES(VS)

PER_REALM_STRONG_PERSISTENT_VALUES(VR)

#undef V

#undef VR

#undef VY

#undef VS

#undef VP

#define VM(PropertyName) V(PropertyName##_binding_template, v8::ObjectTemplate)

#define V(PropertyName, TypeName) \

inline v8::Local<TypeName> PropertyName() const; \

inline void set_##PropertyName(v8::Local<TypeName> value);

PER_ISOLATE_TEMPLATE_PROPERTIES(V)

NODE_BINDINGS_WITH_PER_ISOLATE_INIT(VM)

#undef V

#undef VM

inline v8::Local<v8::String> async_wrap_provider(int index) const;

size_t max_young_gen_size = 1;

std::unordered_map<const char*, v8::Eternal<v8::String>> static_str_map;

inline v8::Isolate* isolate() const;

IsolateData(const IsolateData&) = delete;

IsolateData& operator=(const IsolateData&) = delete;

IsolateData(IsolateData&&) = delete;

IsolateData& operator=(IsolateData&&) = delete;

private:

void DeserializeProperties(const IsolateDataSerializeInfo* isolate_data_info);

void CreateProperties();

#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)

#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)

#define VS(PropertyName, StringValue) V(v8::String, PropertyName)

#define VR(PropertyName, TypeName) V(v8::Private, per_realm_##PropertyName)

#define VM(PropertyName) V(v8::ObjectTemplate, PropertyName##_binding_template)

#define VT(PropertyName, TypeName) V(TypeName, PropertyName)

#define V(TypeName, PropertyName) \

v8::Eternal<TypeName> PropertyName ## _;

PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)

PER_ISOLATE_SYMBOL_PROPERTIES(VY)

PER_ISOLATE_STRING_PROPERTIES(VS)

PER_ISOLATE_TEMPLATE_PROPERTIES(VT)

PER_REALM_STRONG_PERSISTENT_VALUES(VR)

NODE_BINDINGS_WITH_PER_ISOLATE_INIT(VM)

#undef V

#undef VM

#undef VR

#undef VT

#undef VS

#undef VY

#undef VP

// Keep a list of all Persistent strings used for AsyncWrap Provider types.

std::array<v8::Eternal<v8::String>, AsyncWrap::PROVIDERS_LENGTH>

async_wrap_providers_;

v8::Isolate* const isolate_;

uv_loop_t* const event_loop_;

NodeArrayBufferAllocator* const node_allocator_;

MultiIsolatePlatform* platform_;

const SnapshotData* snapshot_data_;

std::optional<SnapshotConfig> snapshot_config_;

std::shared_ptr<PerIsolateOptions> options_;

worker::Worker* worker_context_ = nullptr;

PerIsolateWrapperData* wrapper_data_;

static Mutex isolate_data_mutex_;

static std::unordered_map<uint16_t, std::unique_ptr<PerIsolateWrapperData>>

wrapper_data_map_;

};

struct ContextInfo {

explicit ContextInfo(const std::string& name) : name(name) {}

ContextInfo(const std::string& name, const std::string& origin)

: name(name), origin(origin) {}

const std::string name;

std::string origin;

bool is_default = false;

};

class EnabledDebugList;

namespace per_process {

extern std::shared_ptr<KVStore> system_environment;

}

struct EnvSerializeInfo;

class AsyncHooks : public MemoryRetainer {

public:

SET_MEMORY_INFO_NAME(AsyncHooks)

SET_SELF_SIZE(AsyncHooks)

void MemoryInfo(MemoryTracker* tracker) const override;

// Reason for both UidFields and Fields are that one is stored as a double*

// and the other as a uint32_t*.

enum Fields {

kInit,

kBefore,

kAfter,

kDestroy,

kPromiseResolve,

kTotals,

kCheck,

kStackLength,

kUsesExecutionAsyncResource,

kFieldsCount,

};

enum UidFields {

kExecutionAsyncId,

kTriggerAsyncId,

kAsyncIdCounter,

kDefaultTriggerAsyncId,

kUidFieldsCount,

};

inline AliasedUint32Array& fields();

inline AliasedFloat64Array& async_id_fields();

inline AliasedFloat64Array& async_ids_stack();

inline v8::Local<v8::Array> js_execution_async_resources();

// Returns the native executionAsyncResource value at stack index `index`.

// Resources provided on the JS side are not stored on the native stack,

// in which case an empty `Local<>` is returned.

// The `js_execution_async_resources` array contains the value in that case.

inline v8::Local<v8::Object> native_execution_async_resource(size_t index);

void InstallPromiseHooks(v8::Local<v8::Context> ctx);

void ResetPromiseHooks(v8::Local<v8::Function> init,

v8::Local<v8::Function> before,

v8::Local<v8::Function> after,

v8::Local<v8::Function> resolve);

// Used for testing since V8 doesn't provide API for retrieving configured

// JS promise hooks.

v8::Local<v8::Array> GetPromiseHooks(v8::Isolate* isolate) const;

inline v8::Local<v8::String> provider_string(int idx);

inline void no_force_checks();

inline Environment* env();

// NB: This call does not take (co-)ownership of `execution_async_resource`.

// The lifetime of the `v8::Local<>` pointee must last until

// `pop_async_context()` or `clear_async_id_stack()` are called.

void push_async_context(

double async_id,

double trigger_async_id,

std::variant<v8::Local<v8::Object>*, v8::Global<v8::Object>*>

execution_async_resource);

bool pop_async_context(double async_id);

void clear_async_id_stack(); // Used in fatal exceptions.

AsyncHooks(const AsyncHooks&) = delete;

AsyncHooks& operator=(const AsyncHooks&) = delete;

AsyncHooks(AsyncHooks&&) = delete;

AsyncHooks& operator=(AsyncHooks&&) = delete;

~AsyncHooks() = default;

// Used to set the kDefaultTriggerAsyncId in a scope. This is instead of

// passing the trigger_async_id along with other constructor arguments.

class DefaultTriggerAsyncIdScope {

public:

DefaultTriggerAsyncIdScope() = delete;

explicit DefaultTriggerAsyncIdScope(Environment* env,

double init_trigger_async_id);

explicit DefaultTriggerAsyncIdScope(AsyncWrap* async_wrap);

~DefaultTriggerAsyncIdScope();

DefaultTriggerAsyncIdScope(const DefaultTriggerAsyncIdScope&) = delete;

DefaultTriggerAsyncIdScope& operator=(const DefaultTriggerAsyncIdScope&) =

delete;

DefaultTriggerAsyncIdScope(DefaultTriggerAsyncIdScope&&) = delete;

DefaultTriggerAsyncIdScope& operator=(DefaultTriggerAsyncIdScope&&) =

delete;

private:

AsyncHooks* async_hooks_;

double old_default_trigger_async_id_;

};

struct SerializeInfo {

AliasedBufferIndex async_ids_stack;

AliasedBufferIndex fields;

AliasedBufferIndex async_id_fields;

SnapshotIndex js_execution_async_resources;

std::vector<SnapshotIndex> native_execution_async_resources;

};

SerializeInfo Serialize(v8::Local<v8::Context> context,

v8::SnapshotCreator* creator);

void Deserialize(v8::Local<v8::Context> context);

private:

friend class Environment; // So we can call the constructor.

explicit AsyncHooks(v8::Isolate* isolate, const SerializeInfo* info);

[[noreturn]] void FailWithCorruptedAsyncStack(double expected_async_id);

// Stores the ids of the current execution context stack.

AliasedFloat64Array async_ids_stack_;

// Attached to a Uint32Array that tracks the number of active hooks for

// each type.

AliasedUint32Array fields_;

// Attached to a Float64Array that tracks the state of async resources.

AliasedFloat64Array async_id_fields_;

void grow_async_ids_stack();

v8::Global<v8::Array> js_execution_async_resources_;

// We avoid storing the handles directly here, because they are already

// properly allocated on the stack, we just need access to them here.

// The `v8::Global<>` variant is here because the Node-API API design

// does not allow us to make sure that we exclusively store this value

// on the stack, so we accept the small perf hit that comes with

// global handles in that case.

std::deque<std::variant<v8::Local<v8::Object>*, v8::Global<v8::Object>*>>

native_execution_async_resources_;

// Non-empty during deserialization

const SerializeInfo* info_ = nullptr;

std::array<v8::Global<v8::Function>, 4> js_promise_hooks_;

};

class ImmediateInfo : public MemoryRetainer {

public:

inline AliasedUint32Array& fields();

inline uint32_t count() const;

inline uint32_t ref_count() const;

inline bool has_outstanding() const;

inline void ref_count_inc(uint32_t increment);

inline void ref_count_dec(uint32_t decrement);

ImmediateInfo(const ImmediateInfo&) = delete;

ImmediateInfo& operator=(const ImmediateInfo&) = delete;

ImmediateInfo(ImmediateInfo&&) = delete;

ImmediateInfo& operator=(ImmediateInfo&&) = delete;

~ImmediateInfo() = default;

SET_MEMORY_INFO_NAME(ImmediateInfo)

SET_SELF_SIZE(ImmediateInfo)

void MemoryInfo(MemoryTracker* tracker) const override;

struct SerializeInfo {

AliasedBufferIndex fields;

};

SerializeInfo Serialize(v8::Local<v8::Context> context,

v8::SnapshotCreator* creator);

void Deserialize(v8::Local<v8::Context> context);

private:

friend class Environment; // So we can call the constructor.

explicit ImmediateInfo(v8::Isolate* isolate, const SerializeInfo* info);

enum Fields { kCount, kRefCount, kHasOutstanding, kFieldsCount };

AliasedUint32Array fields_;

};

class TickInfo : public MemoryRetainer {

public:

inline AliasedUint8Array& fields();

inline bool has_tick_scheduled() const;

inline bool has_rejection_to_warn() const;

SET_MEMORY_INFO_NAME(TickInfo)

SET_SELF_SIZE(TickInfo)

void MemoryInfo(MemoryTracker* tracker) const override;

TickInfo(const TickInfo&) = delete;

TickInfo& operator=(const TickInfo&) = delete;

TickInfo(TickInfo&&) = delete;

TickInfo& operator=(TickInfo&&) = delete;

~TickInfo() = default;

struct SerializeInfo {

AliasedBufferIndex fields;

};

SerializeInfo Serialize(v8::Local<v8::Context> context,

v8::SnapshotCreator* creator);

void Deserialize(v8::Local<v8::Context> context);

private:

friend class Environment; // So we can call the constructor.

explicit TickInfo(v8::Isolate* isolate, const SerializeInfo* info);

enum Fields { kHasTickScheduled = 0, kHasRejectionToWarn, kFieldsCount };

AliasedUint8Array fields_;

};

class TrackingTraceStateObserver :

public v8::TracingController::TraceStateObserver {

public:

explicit TrackingTraceStateObserver(Environment* env) : env_(env) {}

void OnTraceEnabled() override {

UpdateTraceCategoryState();

}

void OnTraceDisabled() override {

UpdateTraceCategoryState();

}

private:

void UpdateTraceCategoryState();

Environment* env_;

};

class ShouldNotAbortOnUncaughtScope {

public:

explicit inline ShouldNotAbortOnUncaughtScope(Environment* env);

inline void Close();

inline ~ShouldNotAbortOnUncaughtScope();

ShouldNotAbortOnUncaughtScope(const ShouldNotAbortOnUncaughtScope&) = delete;

ShouldNotAbortOnUncaughtScope& operator=(

const ShouldNotAbortOnUncaughtScope&) = delete;

ShouldNotAbortOnUncaughtScope(ShouldNotAbortOnUncaughtScope&&) = delete;

ShouldNotAbortOnUncaughtScope& operator=(ShouldNotAbortOnUncaughtScope&&) =

delete;

private:

Environment* env_;

};

typedef void (*DeserializeRequestCallback)(v8::Local<v8::Context> context,

v8::Local<v8::Object> holder,

int index,

InternalFieldInfoBase* info);

struct DeserializeRequest {

DeserializeRequestCallback cb;

v8::Global<v8::Object> holder;

int index;

InternalFieldInfoBase* info = nullptr; // Owned by the request

};

struct EnvSerializeInfo {

AsyncHooks::SerializeInfo async_hooks;

TickInfo::SerializeInfo tick_info;

ImmediateInfo::SerializeInfo immediate_info;

AliasedBufferIndex timeout_info;

performance::PerformanceState::SerializeInfo performance_state;

AliasedBufferIndex exit_info;

AliasedBufferIndex stream_base_state;

AliasedBufferIndex should_abort_on_uncaught_toggle;

RealmSerializeInfo principal_realm;

friend std::ostream& operator<<(std::ostream& o, const EnvSerializeInfo& i);

};

struct SnapshotMetadata {

// For now kFullyCustomized is only built with the --build-snapshot CLI flag.

// We might want to add more types of snapshots in the future.

enum class Type : uint8_t { kDefault, kFullyCustomized };

Type type;

std::string node_version;

std::string node_arch;

std::string node_platform;

SnapshotFlags flags;

};

struct SnapshotData {

enum class DataOwnership { kOwned, kNotOwned };

static const uint32_t kMagic = 0x143da19;

static const SnapshotIndex kNodeVMContextIndex = 0;

static const SnapshotIndex kNodeBaseContextIndex = kNodeVMContextIndex + 1;

static const SnapshotIndex kNodeMainContextIndex = kNodeBaseContextIndex + 1;

DataOwnership data_ownership = DataOwnership::kOwned;

SnapshotMetadata metadata;

// The result of v8::SnapshotCreator::CreateBlob() during the snapshot

// building process.

v8::StartupData v8_snapshot_blob_data{nullptr, 0};

IsolateDataSerializeInfo isolate_data_info;

// TODO(joyeecheung): there should be a vector of env_info once we snapshot

// the worker environments.

EnvSerializeInfo env_info;

// A vector of built-in ids and v8::ScriptCompiler::CachedData, this can be

// shared across Node.js instances because they are supposed to share the

// read only space. We use builtins::CodeCacheInfo because

// v8::ScriptCompiler::CachedData is not copyable.

std::vector<builtins::CodeCacheInfo> code_cache;

void ToFile(FILE* out) const;

std::vector<char> ToBlob() const;

// If returns false, the metadata doesn't match the current Node.js binary,

// and the caller should not consume the snapshot data.

bool Check() const;

static bool FromFile(SnapshotData* out, FILE* in);

static bool FromBlob(SnapshotData* out, const std::vector<char>& in);

static bool FromBlob(SnapshotData* out, std::string_view in);

static const SnapshotData* FromEmbedderWrapper(

const EmbedderSnapshotData* data);

EmbedderSnapshotData::Pointer AsEmbedderWrapper() const;

~SnapshotData();

};

void DefaultProcessExitHandlerInternal(Environment* env, ExitCode exit_code);

v8::Maybe<ExitCode> SpinEventLoopInternal(Environment* env);

v8::Maybe<ExitCode> EmitProcessExitInternal(Environment* env);

class Cleanable {

public:

virtual ~Cleanable() = default;

protected:

ListNode<Cleanable> cleanable_queue_;

private:

virtual void Clean() = 0;

friend class Environment;

};

/**

* Environment is a per-isolate data structure that represents an execution

* environment. Each environment has a principal realm. An environment can

* create multiple subsidiary synthetic realms.

*/

class Environment final : public MemoryRetainer {

public:

Environment(const Environment&) = delete;

Environment& operator=(const Environment&) = delete;

Environment(Environment&&) = delete;

Environment& operator=(Environment&&) = delete;

SET_MEMORY_INFO_NAME(Environment)

static std::string GetExecPath(const std::vector<std::string>& argv);

static std::string GetCwd(const std::string& exec_path);

inline size_t SelfSize() const override;

bool IsRootNode() const override { return true; }

void MemoryInfo(MemoryTracker* tracker) const override;

EnvSerializeInfo Serialize(v8::SnapshotCreator* creator);

void DeserializeProperties(const EnvSerializeInfo* info);

void PrintInfoForSnapshotIfDebug();

void EnqueueDeserializeRequest(DeserializeRequestCallback cb,

v8::Local<v8::Object> holder,

int index,

InternalFieldInfoBase* info);

void RunDeserializeRequests();

// Should be called before InitializeInspector()

void InitializeDiagnostics();

#if HAVE_INSPECTOR

// If the environment is created for a worker, pass parent_handle and

// the ownership if transferred into the Environment.

void InitializeInspector(

std::unique_ptr<inspector::ParentInspectorHandle> parent_handle);

void WaitForInspectorFrontendByOptions();

#endif

inline size_t async_callback_scope_depth() const;

inline void PushAsyncCallbackScope();

inline void PopAsyncCallbackScope();

static inline Environment* GetCurrent(v8::Isolate* isolate);

static inline Environment* GetCurrent(v8::Local<v8::Context> context);

static inline Environment* GetCurrent(

const v8::FunctionCallbackInfo<v8::Value>& info);

template <typename T>

static inline Environment* GetCurrent(

const v8::PropertyCallbackInfo<T>& info);

// Create an Environment without initializing a main Context. Use

// InitializeMainContext() to initialize a main context for it.

Environment(IsolateData* isolate_data,

v8::Isolate* isolate,

const std::vector<std::string>& args,

const std::vector<std::string>& exec_args,

const EnvSerializeInfo* env_info,

EnvironmentFlags::Flags flags,

ThreadId thread_id,

std::string_view thread_name = "");

void InitializeMainContext(v8::Local<v8::Context> context,

const EnvSerializeInfo* env_info);

~Environment() override;

void InitializeLibuv();

inline const std::vector<std::string>& exec_argv();

inline const std::vector<std::string>& argv();

const std::string& exec_path() const;

void CleanupHandles();

void Exit(ExitCode code);

void ExitEnv(StopFlags::Flags flags);

void ClosePerEnvHandles();

template <typename T, typename OnCloseCallback>

inline void CloseHandle(T* handle, OnCloseCallback callback);

void ResetPromiseHooks(v8::Local<v8::Function> init,

v8::Local<v8::Function> before,

v8::Local<v8::Function> after,

v8::Local<v8::Function> resolve);

void AssignToContext(v8::Local<v8::Context> context,

Realm* realm,

const ContextInfo& info);

void UnassignFromContext(v8::Local<v8::Context> context);

void TrackShadowRealm(shadow_realm::ShadowRealm* realm);

void UntrackShadowRealm(shadow_realm::ShadowRealm* realm);

void StartProfilerIdleNotifier();

inline v8::Isolate* isolate() const;

inline cppgc::AllocationHandle& cppgc_allocation_handle() const;

inline v8::ExternalMemoryAccounter* external_memory_accounter() const;

inline uv_loop_t* event_loop() const;

void TryLoadAddon(const char* filename,

int flags,

const std::function<bool(binding::DLib*)>& was_loaded);

static inline Environment* from_timer_handle(uv_timer_t* handle);

inline uv_timer_t* timer_handle();

static inline Environment* from_immediate_check_handle(uv_check_t* handle);

inline uv_check_t* immediate_check_handle();

inline uv_idle_t* immediate_idle_handle();

inline void IncreaseWaitingRequestCounter();

inline void DecreaseWaitingRequestCounter();

inline AsyncHooks* async_hooks();

inline ImmediateInfo* immediate_info();

inline AliasedInt32Array& timeout_info();

inline TickInfo* tick_info();

inline uint64_t timer_base() const;

inline permission::Permission* permission();

inline std::shared_ptr<KVStore> env_vars();

inline void set_env_vars(std::shared_ptr<KVStore> env_vars);

inline IsolateData* isolate_data() const;

inline bool printed_error() const;

inline void set_printed_error(bool value);

void PrintSyncTrace() const;

inline void set_trace_sync_io(bool value);

inline void set_force_context_aware(bool value);

inline bool force_context_aware() const;

// This contains fields that are a pseudo-boolean that keeps track of whether

// the process is exiting, an integer representing the process exit code, and

// a pseudo-boolean to indicate whether the exit code is undefined.

inline AliasedInt32Array& exit_info();

inline void set_exiting(bool value);

bool exiting() const;

inline ExitCode exit_code(const ExitCode default_code) const;

inline void set_exit_code(const ExitCode code);

// This stores whether the --abort-on-uncaught-exception flag was passed

// to Node.

inline bool abort_on_uncaught_exception() const;

inline void set_abort_on_uncaught_exception(bool value);

// This is a pseudo-boolean that keeps track of whether an uncaught exception

// should abort the process or not if --abort-on-uncaught-exception was

// passed to Node. If the flag was not passed, it is ignored.

inline AliasedUint32Array& should_abort_on_uncaught_toggle();

inline AliasedInt32Array& stream_base_state();

// The necessary API for async_hooks.

inline double new_async_id();

inline double execution_async_id();

inline double trigger_async_id();

inline double get_default_trigger_async_id();

// List of id's that have been destroyed and need the destroy() cb called.

inline std::vector<double>* destroy_async_id_list();

builtins::BuiltinLoader* builtin_loader();

std::unordered_multimap<int, loader::ModuleWrap*> hash_to_module_map;

EnabledDebugList* enabled_debug_list() { return &enabled_debug_list_; }

inline performance::PerformanceState* performance_state();

v8::Maybe<void> CollectUVExceptionInfo(v8::Local<v8::Value> context,

int errorno,

const char* syscall = nullptr,

const char* message = nullptr,

const char* path = nullptr,

const char* dest = nullptr);

// If this flag is set, calls into JS (if they would be observable

// from userland) must be avoided. This flag does not indicate whether

// calling into JS is allowed from a VM perspective at this point.

inline bool can_call_into_js() const;

inline void set_can_call_into_js(bool can_call_into_js);

// Increase or decrease a counter that manages whether this Environment

// keeps the event loop alive on its own or not. The counter starts out at 0,

// meaning it does not, and any positive value will make it keep the event

// loop alive.

// This is used by Workers to manage their own .ref()/.unref() implementation,

// as Workers aren't directly associated with their own libuv handles.

void add_refs(int64_t diff);

// Convenient getter of the principal realm's has_run_bootstrapping_code().

inline bool has_run_bootstrapping_code() const;

inline bool has_serialized_options() const;

inline void set_has_serialized_options(bool has_serialized_options);

inline bool is_main_thread() const;

inline bool no_native_addons() const;

inline bool should_not_register_esm_loader() const;

inline bool should_create_inspector() const;

inline bool should_wait_for_inspector_frontend() const;

inline bool owns_process_state() const;

inline bool owns_inspector() const;

inline bool tracks_unmanaged_fds() const;

inline bool hide_console_windows() const;

inline bool no_global_search_paths() const;

inline bool should_start_debug_signal_handler() const;

inline bool no_browser_globals() const;

inline uint64_t thread_id() const;

inline std::string_view thread_name() const;

inline worker::Worker* worker_context() const;

Environment* worker_parent_env() const;

inline void add_sub_worker_context(worker::Worker* context);

inline void remove_sub_worker_context(worker::Worker* context);

void stop_sub_worker_contexts();

template <typename Fn>

inline void ForEachWorker(Fn&& iterator);

// Determine if the environment is stopping. This getter is thread-safe.

inline bool is_stopping() const;

inline void set_stopping(bool value);

inline std::list<node_module>* extra_linked_bindings();

inline node_module* extra_linked_bindings_head();

inline node_module* extra_linked_bindings_tail();

inline const Mutex& extra_linked_bindings_mutex() const;

inline void set_source_maps_enabled(bool on);

inline bool source_maps_enabled() const;

inline void ThrowError(const char* errmsg);

inline void ThrowTypeError(const char* errmsg);

inline void ThrowRangeError(const char* errmsg);

inline void ThrowStdErrException(std::error_code error_code,

const char* syscall,

const char* path = nullptr);

inline void ThrowErrnoException(int errorno,

const char* syscall = nullptr,

const char* message = nullptr,

const char* path = nullptr);

inline void ThrowUVException(int errorno,

const char* syscall = nullptr,

const char* message = nullptr,

const char* path = nullptr,

const char* dest = nullptr);

void AtExit(void (*cb)(void* arg), void* arg);

void RunAtExitCallbacks();

v8::Maybe<bool> CheckUnsettledTopLevelAwait() const;

void RunWeakRefCleanup();

v8::MaybeLocal<v8::Value> RunSnapshotSerializeCallback() const;

v8::MaybeLocal<v8::Value> RunSnapshotDeserializeCallback() const;

v8::MaybeLocal<v8::Value> RunSnapshotDeserializeMain() const;

// Primitive values are shared across realms.

// The getters simply proxy to the per-isolate primitive.

#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)

#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)

#define VS(PropertyName, StringValue) V(v8::String, PropertyName)

#define V(TypeName, PropertyName) \

inline v8::Local<TypeName> PropertyName() const;

PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)

PER_ISOLATE_SYMBOL_PROPERTIES(VY)

PER_ISOLATE_STRING_PROPERTIES(VS)

#undef V

#undef VS

#undef VY

#undef VP

#define V(PropertyName, TypeName) \

inline v8::Local<TypeName> PropertyName() const; \

inline void set_ ## PropertyName(v8::Local<TypeName> value);

PER_ISOLATE_TEMPLATE_PROPERTIES(V)

// Per-realm strong persistent values of the principal realm.

// Get/set the value with an explicit realm instead when possible.

// Deprecate soon.

PER_REALM_STRONG_PERSISTENT_VALUES(V)

#undef V

// Return the context of the principal realm.

// Get the context with an explicit realm instead when possible.

// Deprecate soon.

inline v8::Local<v8::Context> context() const;

inline PrincipalRealm* principal_realm() const;

#if HAVE_INSPECTOR

inline inspector::Agent* inspector_agent() const {

return inspector_agent_.get();

}

inline void StopInspector() {

inspector_agent_.reset();

}

inline bool is_in_inspector_console_call() const;

inline void set_is_in_inspector_console_call(bool value);

#endif

typedef ListHead<HandleWrap, &HandleWrap::handle_wrap_queue_> HandleWrapQueue;

typedef ListHead<ReqWrapBase, &ReqWrapBase::req_wrap_queue_> ReqWrapQueue;

typedef ListHead<Cleanable, &Cleanable::cleanable_queue_> CleanableQueue;

inline HandleWrapQueue* handle_wrap_queue() { return &handle_wrap_queue_; }

inline CleanableQueue* cleanable_queue() {

return &cleanable_queue_;

}

inline ReqWrapQueue* req_wrap_queue() { return &req_wrap_queue_; }

// https://w3c.github.io/hr-time/#dfn-time-origin

inline uint64_t time_origin() {

return time_origin_;

}

// https://w3c.github.io/hr-time/#dfn-get-time-origin-timestamp

inline double time_origin_timestamp() {

return time_origin_timestamp_;

}

inline bool EmitProcessEnvWarning() {

bool current_value = emit_env_nonstring_warning_;

emit_env_nonstring_warning_ = false;

return current_value;

}

inline bool EmitErrNameWarning() {

bool current_value = emit_err_name_warning_;

emit_err_name_warning_ = false;

return current_value;

}

// cb will be called as cb(env) on the next event loop iteration.

// Unlike the JS setImmediate() function, nested SetImmediate() calls will

// be run without returning control to the event loop, similar to nextTick().

template <typename Fn>

inline void SetImmediate(

Fn&& cb, CallbackFlags::Flags flags = CallbackFlags::kRefed);

template <typename Fn>

// This behaves like SetImmediate() but can be called from any thread.

inline void SetImmediateThreadsafe(

Fn&& cb, CallbackFlags::Flags flags = CallbackFlags::kRefed);

// This behaves like V8's Isolate::RequestInterrupt(), but also accounts for

// the event loop (i.e. combines the V8 function with SetImmediate()).

// The passed callback may not throw exceptions.

// This function can be called from any thread.

template <typename Fn>

inline void RequestInterrupt(Fn&& cb);

// This needs to be available for the JS-land setImmediate().

void ToggleImmediateRef(bool ref);

inline void PushShouldNotAbortOnUncaughtScope();

inline void PopShouldNotAbortOnUncaughtScope();

inline bool inside_should_not_abort_on_uncaught_scope() const;

static inline Environment* ForAsyncHooks(AsyncHooks* hooks);

v8::Local<v8::Value> GetNow();

uint64_t GetNowUint64();

void ScheduleTimer(int64_t duration);

void ToggleTimerRef(bool ref);

inline void AddCleanupHook(CleanupQueue::Callback cb, void* arg);

inline void RemoveCleanupHook(CleanupQueue::Callback cb, void* arg);

void RunCleanup();

static void TracePromises(v8::PromiseHookType type,

v8::Local<v8::Promise> promise,

v8::Local<v8::Value> parent);

static size_t NearHeapLimitCallback(void* data,

size_t current_heap_limit,

size_t initial_heap_limit);

static void BuildEmbedderGraph(v8::Isolate* isolate,

v8::EmbedderGraph* graph,

void* data);

inline std::shared_ptr<EnvironmentOptions> options();

inline std::shared_ptr<ExclusiveAccess<HostPort>> inspector_host_port();

inline int64_t stack_trace_limit() const;

#if HAVE_INSPECTOR

void set_coverage_connection(

std::unique_ptr<profiler::V8CoverageConnection> connection);

profiler::V8CoverageConnection* coverage_connection();

inline void set_coverage_directory(const char* directory);

inline const std::string& coverage_directory() const;

void set_cpu_profiler_connection(

std::unique_ptr<profiler::V8CpuProfilerConnection> connection);

profiler::V8CpuProfilerConnection* cpu_profiler_connection();

inline void set_cpu_prof_name(const std::string& name);

inline const std::string& cpu_prof_name() const;