// 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"

#endif

#include "handle_wrap.h"

#include "req_wrap.h"

#include "util.h"

#include "uv.h"

#include "v8.h"

#include "node.h"

#include "node_http2_state.h"

#include <list>

#include <stdint.h>

#include <vector>

#include <unordered_map>

#include <unordered_set>

struct nghttp2_rcbuf;

namespace node {

namespace fs {

class FileHandleReadWrap;

}

namespace performance {

class performance_state;

}

namespace tracing {

class AgentWriterHandle;

}

namespace worker {

class Worker;

}

namespace loader {

class ModuleWrap;

struct PackageConfig {

enum class Exists { Yes, No };

enum class IsValid { Yes, No };

enum class HasMain { Yes, No };

Exists exists;

IsValid is_valid;

HasMain has_main;

std::string main;

};

} // namespace loader

// The number of items passed to push_values_to_array_function has diminishing

// returns around 8. This should be used at all call sites using said function.

#ifndef NODE_PUSH_VAL_TO_ARRAY_MAX

#define NODE_PUSH_VAL_TO_ARRAY_MAX 8

#endif

// PER_ISOLATE_* macros: We have a lot of per-isolate properties

// and adding and maintaining their getters and setters by hand would be

// difficult so let's make the preprocessor generate them for us.

//

// In each macro, `V` is expected to be the name of a macro or function which

// accepts the number of arguments provided in each tuple in the macro body,

// typically two. The named function will be invoked against each tuple.

//

// Make sure that any macro V defined for use with the PER_ISOLATE_* macros is

// undefined again after use.

// Private symbols are per-isolate primitives but Environment proxies them

// for the sake of convenience. Strings should be ASCII-only and have a

// "node:" prefix to avoid name clashes with third-party code.

#define PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V) \

V(alpn_buffer_private_symbol, "node:alpnBuffer") \

V(arrow_message_private_symbol, "node:arrowMessage") \

V(contextify_context_private_symbol, "node:contextify:context") \

V(contextify_global_private_symbol, "node:contextify:global") \

V(decorated_private_symbol, "node:decorated") \

V(napi_env, "node:napi:env") \

V(napi_wrapper, "node:napi:wrapper") \

V(sab_lifetimepartner_symbol, "node:sharedArrayBufferLifetimePartner") \

// Symbols are per-isolate primitives but Environment proxies them

// for the sake of convenience.

#define PER_ISOLATE_SYMBOL_PROPERTIES(V) \

V(handle_onclose_symbol, "handle_onclose") \

V(owner_symbol, "owner") \

// Strings are per-isolate primitives but Environment proxies them

// for the sake of convenience. Strings should be ASCII-only.

#define PER_ISOLATE_STRING_PROPERTIES(V) \

V(address_string, "address") \

V(args_string, "args") \

V(async, "async") \

V(async_ids_stack_string, "async_ids_stack") \

V(buffer_string, "buffer") \

V(bytes_string, "bytes") \

V(bytes_parsed_string, "bytesParsed") \

V(bytes_read_string, "bytesRead") \

V(bytes_written_string, "bytesWritten") \

V(cached_data_string, "cachedData") \

V(cached_data_produced_string, "cachedDataProduced") \

V(cached_data_rejected_string, "cachedDataRejected") \

V(change_string, "change") \

V(channel_string, "channel") \

V(chunks_sent_since_last_write_string, "chunksSentSinceLastWrite") \

V(constants_string, "constants") \

V(oncertcb_string, "oncertcb") \

V(code_string, "code") \

V(cwd_string, "cwd") \

V(dest_string, "dest") \

V(destroyed_string, "destroyed") \

V(detached_string, "detached") \

V(dns_a_string, "A") \

V(dns_aaaa_string, "AAAA") \

V(dns_cname_string, "CNAME") \

V(dns_mx_string, "MX") \

V(dns_naptr_string, "NAPTR") \

V(dns_ns_string, "NS") \

V(dns_ptr_string, "PTR") \

V(dns_soa_string, "SOA") \

V(dns_srv_string, "SRV") \

V(dns_txt_string, "TXT") \

V(emit_warning_string, "emitWarning") \

V(exchange_string, "exchange") \

V(encoding_string, "encoding") \

V(entries_string, "entries") \

V(env_pairs_string, "envPairs") \

V(errno_string, "errno") \

V(error_string, "error") \

V(exit_code_string, "exitCode") \

V(expire_string, "expire") \

V(exponent_string, "exponent") \

V(exports_string, "exports") \

V(ext_key_usage_string, "ext_key_usage") \

V(external_stream_string, "_externalStream") \

V(family_string, "family") \

V(fatal_exception_string, "_fatalException") \

V(fd_string, "fd") \

V(file_string, "file") \

V(fingerprint_string, "fingerprint") \

V(fingerprint256_string, "fingerprint256") \

V(flags_string, "flags") \

V(fragment_string, "fragment") \

V(get_data_clone_error_string, "_getDataCloneError") \

V(get_shared_array_buffer_id_string, "_getSharedArrayBufferId") \

V(gid_string, "gid") \

V(handle_string, "handle") \

V(homedir_string, "homedir") \

V(host_string, "host") \

V(hostmaster_string, "hostmaster") \

V(ignore_string, "ignore") \

V(infoaccess_string, "infoAccess") \

V(inherit_string, "inherit") \

V(input_string, "input") \

V(internal_string, "internal") \

V(ipv4_string, "IPv4") \

V(ipv6_string, "IPv6") \

V(isclosing_string, "isClosing") \

V(issuer_string, "issuer") \

V(issuercert_string, "issuerCertificate") \

V(kill_signal_string, "killSignal") \

V(mac_string, "mac") \

V(main_string, "main") \

V(max_buffer_string, "maxBuffer") \

V(message_string, "message") \

V(message_port_string, "messagePort") \

V(message_port_constructor_string, "MessagePort") \

V(minttl_string, "minttl") \

V(modulus_string, "modulus") \

V(name_string, "name") \

V(netmask_string, "netmask") \

V(nsname_string, "nsname") \

V(ocsp_request_string, "OCSPRequest") \

V(onaltsvc_string, "onaltsvc") \

V(onchange_string, "onchange") \

V(onclienthello_string, "onclienthello") \

V(oncomplete_string, "oncomplete") \

V(onconnection_string, "onconnection") \

V(ondone_string, "ondone") \

V(onerror_string, "onerror") \

V(onexit_string, "onexit") \

V(onframeerror_string, "onframeerror") \

V(ongetpadding_string, "ongetpadding") \

V(onhandshakedone_string, "onhandshakedone") \

V(onhandshakestart_string, "onhandshakestart") \

V(onheaders_string, "onheaders") \

V(oninit_string, "oninit") \

V(onmessage_string, "onmessage") \

V(onnewsession_string, "onnewsession") \

V(onocspresponse_string, "onocspresponse") \

V(ongoawaydata_string, "ongoawaydata") \

V(onpriority_string, "onpriority") \

V(onread_string, "onread") \

V(onreadstart_string, "onreadstart") \

V(onreadstop_string, "onreadstop") \

V(onsettings_string, "onsettings") \

V(onshutdown_string, "onshutdown") \

V(onsignal_string, "onsignal") \

V(onstreamclose_string, "onstreamclose") \

V(ontrailers_string, "ontrailers") \

V(onunpipe_string, "onunpipe") \

V(onwrite_string, "onwrite") \

V(openssl_error_stack, "opensslErrorStack") \

V(output_string, "output") \

V(order_string, "order") \

V(parse_error_string, "Parse Error") \

V(password_string, "password") \

V(path_string, "path") \

V(pending_handle_string, "pendingHandle") \

V(pid_string, "pid") \

V(pipe_string, "pipe") \

V(pipe_target_string, "pipeTarget") \

V(pipe_source_string, "pipeSource") \

V(port_string, "port") \

V(port1_string, "port1") \

V(port2_string, "port2") \

V(preference_string, "preference") \

V(priority_string, "priority") \

V(promise_string, "promise") \

V(pubkey_string, "pubkey") \

V(query_string, "query") \

V(raw_string, "raw") \

V(read_host_object_string, "_readHostObject") \

V(readable_string, "readable") \

V(refresh_string, "refresh") \

V(regexp_string, "regexp") \

V(rename_string, "rename") \

V(replacement_string, "replacement") \

V(retry_string, "retry") \

V(scheme_string, "scheme") \

V(serial_string, "serial") \

V(scopeid_string, "scopeid") \

V(serial_number_string, "serialNumber") \

V(service_string, "service") \

V(servername_string, "servername") \

V(session_id_string, "sessionId") \

V(shell_string, "shell") \

V(signal_string, "signal") \

V(sink_string, "sink") \

V(size_string, "size") \

V(sni_context_err_string, "Invalid SNI context") \

V(sni_context_string, "sni_context") \

V(source_string, "source") \

V(stack_string, "stack") \

V(status_string, "status") \

V(stdio_string, "stdio") \

V(subject_string, "subject") \

V(subjectaltname_string, "subjectaltname") \

V(syscall_string, "syscall") \

V(thread_id_string, "threadId") \

V(ticketkeycallback_string, "onticketkeycallback") \

V(timeout_string, "timeout") \

V(tls_ticket_string, "tlsTicket") \

V(ttl_string, "ttl") \

V(type_string, "type") \

V(uid_string, "uid") \

V(unknown_string, "<unknown>") \

V(url_string, "url") \

V(username_string, "username") \

V(valid_from_string, "valid_from") \

V(valid_to_string, "valid_to") \

V(value_string, "value") \

V(verify_error_string, "verifyError") \

V(version_string, "version") \

V(weight_string, "weight") \

V(windows_hide_string, "windowsHide") \

V(windows_verbatim_arguments_string, "windowsVerbatimArguments") \

V(wrap_string, "wrap") \

V(writable_string, "writable") \

V(write_host_object_string, "_writeHostObject") \

V(write_queue_size_string, "writeQueueSize") \

V(x_forwarded_string, "x-forwarded-for") \

V(zero_return_string, "ZERO_RETURN")

#define ENVIRONMENT_STRONG_PERSISTENT_PROPERTIES(V) \

V(as_external, v8::External) \

V(async_hooks_after_function, v8::Function) \

V(async_hooks_before_function, v8::Function) \

V(async_hooks_binding, v8::Object) \

V(async_hooks_destroy_function, v8::Function) \

V(async_hooks_init_function, v8::Function) \

V(async_hooks_promise_resolve_function, v8::Function) \

V(async_wrap_constructor_template, v8::FunctionTemplate) \

V(buffer_prototype_object, v8::Object) \

V(context, v8::Context) \

V(domain_callback, v8::Function) \

V(domexception_function, v8::Function) \

V(fdclose_constructor_template, v8::ObjectTemplate) \

V(fd_constructor_template, v8::ObjectTemplate) \

V(filehandlereadwrap_template, v8::ObjectTemplate) \

V(fsreqpromise_constructor_template, v8::ObjectTemplate) \

V(fs_use_promises_symbol, v8::Symbol) \

V(host_import_module_dynamically_callback, v8::Function) \

V(host_initialize_import_meta_object_callback, v8::Function) \

V(http2ping_constructor_template, v8::ObjectTemplate) \

V(http2settings_constructor_template, v8::ObjectTemplate) \

V(http2stream_constructor_template, v8::ObjectTemplate) \

V(immediate_callback_function, v8::Function) \

V(inspector_console_api_object, v8::Object) \

V(message_port, v8::Object) \

V(message_port_constructor_template, v8::FunctionTemplate) \

V(pipe_constructor_template, v8::FunctionTemplate) \

V(performance_entry_callback, v8::Function) \

V(performance_entry_template, v8::Function) \

V(process_object, v8::Object) \

V(promise_reject_handled_function, v8::Function) \

V(promise_reject_unhandled_function, v8::Function) \

V(promise_wrap_template, v8::ObjectTemplate) \

V(push_values_to_array_function, v8::Function) \

V(sab_lifetimepartner_constructor_template, v8::FunctionTemplate) \

V(script_context_constructor_template, v8::FunctionTemplate) \

V(script_data_constructor_function, v8::Function) \

V(secure_context_constructor_template, v8::FunctionTemplate) \

V(shutdown_wrap_template, v8::ObjectTemplate) \

V(tcp_constructor_template, v8::FunctionTemplate) \

V(tick_callback_function, v8::Function) \

V(timers_callback_function, v8::Function) \

V(tls_wrap_constructor_function, v8::Function) \

V(trace_category_state_function, v8::Function) \

V(tty_constructor_template, v8::FunctionTemplate) \

V(udp_constructor_function, v8::Function) \

V(url_constructor_function, v8::Function) \

V(write_wrap_template, v8::ObjectTemplate)

class Environment;

class IsolateData {

public:

IsolateData(v8::Isolate* isolate, uv_loop_t* event_loop,

MultiIsolatePlatform* platform = nullptr,

uint32_t* zero_fill_field = nullptr);

~IsolateData();

inline uv_loop_t* event_loop() const;

inline uint32_t* zero_fill_field() const;

inline MultiIsolatePlatform* platform() const;

#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(v8::Isolate* isolate) const;

PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)

PER_ISOLATE_SYMBOL_PROPERTIES(VY)

PER_ISOLATE_STRING_PROPERTIES(VS)

#undef V

#undef VS

#undef VP

std::unordered_map<nghttp2_rcbuf*, v8::Eternal<v8::String>> http2_static_strs;

inline v8::Isolate* isolate() const;

private:

#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) \

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

PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)

PER_ISOLATE_SYMBOL_PROPERTIES(VY)

PER_ISOLATE_STRING_PROPERTIES(VS)

#undef V

#undef VS

#undef VP

v8::Isolate* const isolate_;

uv_loop_t* const event_loop_;

uint32_t* const zero_fill_field_;

MultiIsolatePlatform* platform_;

DISALLOW_COPY_AND_ASSIGN(IsolateData);

};

struct ContextInfo {

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

const std::string name;

std::string origin;

bool is_default = false;

};

// Listing the AsyncWrap provider types first enables us to cast directly

// from a provider type to a debug category.

#define DEBUG_CATEGORY_NAMES(V) \

NODE_ASYNC_PROVIDER_TYPES(V) \

V(INSPECTOR_SERVER)

enum class DebugCategory {

#define V(name) name,

DEBUG_CATEGORY_NAMES(V)

#undef V

CATEGORY_COUNT

};

class Environment {

public:

class AsyncHooks {

public:

// 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,

kFieldsCount,

};

enum UidFields {

kExecutionAsyncId,

kTriggerAsyncId,

kAsyncIdCounter,

kDefaultTriggerAsyncId,

kUidFieldsCount,

};

inline AliasedBuffer<uint32_t, v8::Uint32Array>& fields();

inline AliasedBuffer<double, v8::Float64Array>& async_id_fields();

inline AliasedBuffer<double, v8::Float64Array>& async_ids_stack();

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

inline void no_force_checks();

inline Environment* env();

inline void push_async_ids(double async_id, double trigger_async_id);

inline bool pop_async_id(double async_id);

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

// 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();

private:

AliasedBuffer<double, v8::Float64Array> async_id_fields_ref_;

double old_default_trigger_async_id_;

DISALLOW_COPY_AND_ASSIGN(DefaultTriggerAsyncIdScope);

};

private:

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

inline AsyncHooks();

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

v8::Eternal<v8::String> providers_[AsyncWrap::PROVIDERS_LENGTH];

// Keep track of the environment copy itself.

Environment* env_;

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

AliasedBuffer<double, v8::Float64Array> async_ids_stack_;

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

// each type.

AliasedBuffer<uint32_t, v8::Uint32Array> fields_;

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

AliasedBuffer<double, v8::Float64Array> async_id_fields_;

void grow_async_ids_stack();

DISALLOW_COPY_AND_ASSIGN(AsyncHooks);

};

class AsyncCallbackScope {

public:

AsyncCallbackScope() = delete;

explicit AsyncCallbackScope(Environment* env);

~AsyncCallbackScope();

private:

Environment* env_;

DISALLOW_COPY_AND_ASSIGN(AsyncCallbackScope);

};

inline size_t makecallback_depth() const;

class ImmediateInfo {

public:

inline AliasedBuffer<uint32_t, v8::Uint32Array>& fields();

inline uint32_t count() const;

inline uint32_t ref_count() const;

inline bool has_outstanding() const;

inline void count_inc(uint32_t increment);

inline void count_dec(uint32_t decrement);

inline void ref_count_inc(uint32_t increment);

inline void ref_count_dec(uint32_t decrement);

private:

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

inline explicit ImmediateInfo(v8::Isolate* isolate);

enum Fields {

kCount,

kRefCount,

kHasOutstanding,

kFieldsCount

};

AliasedBuffer<uint32_t, v8::Uint32Array> fields_;

DISALLOW_COPY_AND_ASSIGN(ImmediateInfo);

};

class TickInfo {

public:

inline AliasedBuffer<uint8_t, v8::Uint8Array>& fields();

inline bool has_scheduled() const;

inline bool has_promise_rejections() const;

inline void promise_rejections_toggle_on();

private:

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

inline explicit TickInfo(v8::Isolate* isolate);

enum Fields {

kHasScheduled,

kHasPromiseRejections,

kFieldsCount

};

AliasedBuffer<uint8_t, v8::Uint8Array> fields_;

DISALLOW_COPY_AND_ASSIGN(TickInfo);

};

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);

static uv_key_t thread_local_env;

static inline Environment* GetThreadLocalEnv();

Environment(IsolateData* isolate_data,

v8::Local<v8::Context> context,

tracing::AgentWriterHandle* tracing_agent_writer);

~Environment();

void Start(int argc,

const char* const* argv,

int exec_argc,

const char* const* exec_argv,

bool start_profiler_idle_notifier);

typedef void (*HandleCleanupCb)(Environment* env,

uv_handle_t* handle,

void* arg);

struct HandleCleanup {

uv_handle_t* handle_;

HandleCleanupCb cb_;

void* arg_;

};

void RegisterHandleCleanups();

void CleanupHandles();

void Exit(int code);

// Register clean-up cb to be called on environment destruction.

inline void RegisterHandleCleanup(uv_handle_t* handle,

HandleCleanupCb cb,

void* arg);

template <typename T, typename OnCloseCallback>

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

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

const ContextInfo& info);

void StartProfilerIdleNotifier();

void StopProfilerIdleNotifier();

inline bool profiler_idle_notifier_started() const;

inline v8::Isolate* isolate() const;

inline tracing::AgentWriterHandle* tracing_agent_writer() const;

inline uv_loop_t* event_loop() const;

inline uint32_t watched_providers() const;

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 TickInfo* tick_info();

inline uint64_t timer_base() const;

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);

// 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 AliasedBuffer<uint32_t, v8::Uint32Array>&

should_abort_on_uncaught_toggle();

inline AliasedBuffer<uint8_t, v8::Uint8Array>& trace_category_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();

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

std::unordered_map<std::string, const loader::PackageConfig>

package_json_cache;

inline double* heap_statistics_buffer() const;

inline void set_heap_statistics_buffer(double* pointer);

inline double* heap_space_statistics_buffer() const;

inline void set_heap_space_statistics_buffer(double* pointer);

inline char* http_parser_buffer() const;

inline void set_http_parser_buffer(char* buffer);

inline bool http_parser_buffer_in_use() const;

inline void set_http_parser_buffer_in_use(bool in_use);

inline http2::Http2State* http2_state() const;

inline void set_http2_state(std::unique_ptr<http2::Http2State> state);

inline bool debug_enabled(DebugCategory category) const;

inline void set_debug_enabled(DebugCategory category, bool enabled);

void set_debug_categories(const std::string& cats, bool enabled);

inline AliasedBuffer<double, v8::Float64Array>* fs_stats_field_array();

inline AliasedBuffer<uint64_t, v8::BigUint64Array>*

fs_stats_field_bigint_array();

// stat fields contains twice the number of entries because `fs.StatWatcher`

// needs room to store data for *two* `fs.Stats` instances.

static const int kFsStatsFieldsLength = 14;

inline std::vector<std::unique_ptr<fs::FileHandleReadWrap>>&

file_handle_read_wrap_freelist();

inline performance::performance_state* performance_state();

inline std::unordered_map<std::string, uint64_t>* performance_marks();

void CollectExceptionInfo(v8::Local<v8::Value> context,

int errorno,

const char* syscall = nullptr,

const char* message = nullptr,

const char* path = nullptr);

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);

inline bool is_main_thread() const;

inline uint64_t thread_id() const;

inline void set_thread_id(uint64_t id);

inline worker::Worker* worker_context() const;

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

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

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

void stop_sub_worker_contexts();

inline bool is_stopping_worker() const;

inline void ThrowError(const char* errmsg);

inline void ThrowTypeError(const char* errmsg);

inline void ThrowRangeError(const char* errmsg);

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);

inline v8::Local<v8::FunctionTemplate>

NewFunctionTemplate(v8::FunctionCallback callback,

v8::Local<v8::Signature> signature =

v8::Local<v8::Signature>(),

v8::ConstructorBehavior behavior =

v8::ConstructorBehavior::kAllow,

v8::SideEffectType side_effect =

v8::SideEffectType::kHasSideEffect);

// Convenience methods for NewFunctionTemplate().

inline void SetMethod(v8::Local<v8::Object> that,

const char* name,

v8::FunctionCallback callback);

inline void SetProtoMethod(v8::Local<v8::FunctionTemplate> that,

const char* name,

v8::FunctionCallback callback);

inline void SetTemplateMethod(v8::Local<v8::FunctionTemplate> that,

const char* name,

v8::FunctionCallback callback);

// Safe variants denote the function has no side effects.

inline void SetMethodNoSideEffect(v8::Local<v8::Object> that,

const char* name,

v8::FunctionCallback callback);

inline void SetProtoMethodNoSideEffect(v8::Local<v8::FunctionTemplate> that,

const char* name,

v8::FunctionCallback callback);

inline void SetTemplateMethodNoSideEffect(

v8::Local<v8::FunctionTemplate> that,

const char* name,

v8::FunctionCallback callback);

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

void RunBeforeExitCallbacks();

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

void RunAtExitCallbacks();

// Strings and private symbols are shared across shared contexts

// 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);

ENVIRONMENT_STRONG_PERSISTENT_PROPERTIES(V)

#undef V

#if HAVE_INSPECTOR

inline inspector::Agent* inspector_agent() const {

return inspector_agent_.get();

}

#endif

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

typedef ListHead<ReqWrap<uv_req_t>, &ReqWrap<uv_req_t>::req_wrap_queue_>

ReqWrapQueue;

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

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

void AddPromiseHook(promise_hook_func fn, void* arg);

bool RemovePromiseHook(promise_hook_func fn, void* arg);

inline bool EmitProcessEnvWarning() {

bool current_value = emit_env_nonstring_warning_;

emit_env_nonstring_warning_ = false;

return current_value;

}

typedef void (*native_immediate_callback)(Environment* env, void* data);

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

// obj will be kept alive between now and after the callback has run.

inline void SetImmediate(native_immediate_callback cb,

void* data,

v8::Local<v8::Object> obj = v8::Local<v8::Object>());

inline void SetUnrefImmediate(native_immediate_callback cb,

void* data,

v8::Local<v8::Object> obj =

v8::Local<v8::Object>());

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

void ToggleImmediateRef(bool ref);

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();

private:

Environment* env_;

};

inline bool inside_should_not_abort_on_uncaught_scope() const;

static inline Environment* ForAsyncHooks(AsyncHooks* hooks);

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

void ScheduleTimer(int64_t duration);

void ToggleTimerRef(bool ref);

inline void AddCleanupHook(void (*fn)(void*), void* arg);

inline void RemoveCleanupHook(void (*fn)(void*), void* arg);

void RunCleanup();

static void BuildEmbedderGraph(v8::Isolate* isolate,

v8::EmbedderGraph* graph,

void* data);

private:

inline void CreateImmediate(native_immediate_callback cb,

void* data,

v8::Local<v8::Object> obj,

bool ref);

inline void ThrowError(v8::Local<v8::Value> (*fun)(v8::Local<v8::String>),

const char* errmsg);

v8::Isolate* const isolate_;

IsolateData* const isolate_data_;

tracing::AgentWriterHandle* const tracing_agent_writer_;

uv_timer_t timer_handle_;

uv_check_t immediate_check_handle_;

uv_idle_t immediate_idle_handle_;

uv_prepare_t idle_prepare_handle_;

uv_check_t idle_check_handle_;

bool profiler_idle_notifier_started_ = false;

AsyncHooks async_hooks_;

ImmediateInfo immediate_info_;

TickInfo tick_info_;

const uint64_t timer_base_;

bool printed_error_;

bool trace_sync_io_;

bool abort_on_uncaught_exception_;

bool emit_env_nonstring_warning_;

size_t makecallback_cntr_;

std::vector<double> destroy_async_id_list_;

AliasedBuffer<uint32_t, v8::Uint32Array> should_abort_on_uncaught_toggle_;

int should_not_abort_scope_counter_ = 0;

// Attached to a Uint8Array that tracks the state of trace category

AliasedBuffer<uint8_t, v8::Uint8Array> trace_category_state_;

std::unique_ptr<TrackingTraceStateObserver> trace_state_observer_;

std::unique_ptr<performance::performance_state> performance_state_;

std::unordered_map<std::string, uint64_t> performance_marks_;

bool can_call_into_js_ = true;

uint64_t thread_id_ = 0;

std::unordered_set<worker::Worker*> sub_worker_contexts_;

static void* kNodeContextTagPtr;

static int const kNodeContextTag;

#if HAVE_INSPECTOR

std::unique_ptr<inspector::Agent> inspector_agent_;

#endif

// handle_wrap_queue_ and req_wrap_queue_ needs to be at a fixed offset from

// the start of the class because it is used by

// src/node_postmortem_metadata.cc to calculate offsets and generate debug

// symbols for Environment, which assumes that the position of members in

// memory are predictable. For more information please refer to

// `doc/guides/node-postmortem-support.md`

friend int GenDebugSymbols();

HandleWrapQueue handle_wrap_queue_;

ReqWrapQueue req_wrap_queue_;

std::list<HandleCleanup> handle_cleanup_queue_;

int handle_cleanup_waiting_ = 0;

int request_waiting_ = 0;

double* heap_statistics_buffer_ = nullptr;

double* heap_space_statistics_buffer_ = nullptr;

char* http_parser_buffer_;

bool http_parser_buffer_in_use_ = false;

std::unique_ptr<http2::Http2State> http2_state_;

bool debug_enabled_[static_cast<int>(DebugCategory::CATEGORY_COUNT)] = {0};

AliasedBuffer<double, v8::Float64Array> fs_stats_field_array_;

AliasedBuffer<uint64_t, v8::BigUint64Array> fs_stats_field_bigint_array_;

std::vector<std::unique_ptr<fs::FileHandleReadWrap>>

file_handle_read_wrap_freelist_;

worker::Worker* worker_context_ = nullptr;

static void RunTimers(uv_timer_t* handle);

struct ExitCallback {

void (*cb_)(void* arg);

void* arg_;

};

std::list<ExitCallback> before_exit_functions_;

std::list<ExitCallback> at_exit_functions_;

struct PromiseHookCallback {

promise_hook_func cb_;

void* arg_;

size_t enable_count_;

};

std::vector<PromiseHookCallback> promise_hooks_;

struct NativeImmediateCallback {

native_immediate_callback cb_;

void* data_;

std::unique_ptr<Persistent<v8::Object>> keep_alive_;

bool refed_;

};

std::vector<NativeImmediateCallback> native_immediate_callbacks_;

void RunAndClearNativeImmediates();

static void CheckImmediate(uv_check_t* handle);

struct CleanupHookCallback {

void (*fn_)(void*);

void* arg_;

// We keep track of the insertion order for these objects, so that we can

// call the callbacks in reverse order when we are cleaning up.

uint64_t insertion_order_counter_;

// Only hashes `arg_`, since that is usually enough to identify the hook.

struct Hash {

inline size_t operator()(const CleanupHookCallback& cb) const;

};