// 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 "handle_wrap.h"

#include "node.h"

#include "node_binding.h"

#include "node_http2_state.h"

#include "node_main_instance.h"

#include "node_options.h"

#include "req_wrap.h"

#include "util.h"

#include "uv.h"

#include "v8.h"

#include <array>

#include <atomic>

#include <cstdint>

#include <functional>

#include <list>

#include <unordered_map>

#include <unordered_set>

#include <vector>

struct nghttp2_rcbuf;

namespace node {

namespace contextify {

class ContextifyScript;

class CompiledFnEntry;

}

namespace fs {

class FileHandleReadWrap;

}

namespace performance {

class performance_state;

}

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;

struct PackageConfig {

enum class Exists { Yes, No };

enum class IsValid { Yes, No };

enum class HasMain { Yes, No };

enum PackageType : uint32_t { None = 0, CommonJS, Module };

const Exists exists;

const IsValid is_valid;

const HasMain has_main;

const std::string main;

const PackageType type;

v8::Global<v8::Value> exports;

};

} // namespace loader

enum class FsStatsOffset {

kDev = 0,

kMode,

kNlink,

kUid,

kGid,

kRdev,

kBlkSize,

kIno,

kSize,

kBlocks,

kATimeSec,

kATimeNsec,

kMTimeSec,

kMTimeNsec,

kCTimeSec,

kCTimeNsec,

kBirthTimeSec,

kBirthTimeNsec,

kFsStatsFieldsNumber

};

// Stat fields buffers contain twice the number of entries in an uv_stat_t

// because `fs.StatWatcher` needs room to store 2 `fs.Stats` instances.

constexpr size_t kFsStatsBufferLength =

static_cast<size_t>(FsStatsOffset::kFsStatsFieldsNumber) * 2;

// 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_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(no_message_symbol, "no_message_symbol") \

V(oninit_symbol, "oninit") \

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(aliases_string, "aliases") \

V(args_string, "args") \

V(asn1curve_string, "asn1Curve") \

V(async_ids_stack_string, "async_ids_stack") \

V(bits_string, "bits") \

V(buffer_string, "buffer") \

V(bytes_parsed_string, "bytesParsed") \

V(bytes_read_string, "bytesRead") \

V(bytes_written_string, "bytesWritten") \

V(cached_data_produced_string, "cachedDataProduced") \

V(cached_data_rejected_string, "cachedDataRejected") \

V(cached_data_string, "cachedData") \

V(cache_key_string, "cacheKey") \

V(change_string, "change") \

V(channel_string, "channel") \

V(chunks_sent_since_last_write_string, "chunksSentSinceLastWrite") \

V(clone_unsupported_type_str, "Cannot transfer object of unsupported type.") \

V(code_string, "code") \

V(commonjs_string, "commonjs") \

V(config_string, "config") \

V(constants_string, "constants") \

V(crypto_dsa_string, "dsa") \

V(crypto_ec_string, "ec") \

V(crypto_ed25519_string, "ed25519") \

V(crypto_ed448_string, "ed448") \

V(crypto_x25519_string, "x25519") \

V(crypto_x448_string, "x448") \

V(crypto_rsa_string, "rsa") \

V(crypto_rsa_pss_string, "rsa-pss") \

V(cwd_string, "cwd") \

V(data_string, "data") \

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(done_string, "done") \

V(duration_string, "duration") \

V(emit_warning_string, "emitWarning") \

V(encoding_string, "encoding") \

V(entries_string, "entries") \

V(entry_type_string, "entryType") \

V(env_pairs_string, "envPairs") \

V(env_var_settings_string, "envVarSettings") \

V(errno_string, "errno") \

V(error_string, "error") \

V(exchange_string, "exchange") \

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(fields_string, "fields") \

V(file_string, "file") \

V(fingerprint256_string, "fingerprint256") \

V(fingerprint_string, "fingerprint") \

V(flags_string, "flags") \

V(fragment_string, "fragment") \

V(function_string, "function") \

V(get_data_clone_error_string, "_getDataCloneError") \

V(get_shared_array_buffer_id_string, "_getSharedArrayBufferId") \

V(gid_string, "gid") \

V(h2_string, "h2") \

V(handle_string, "handle") \

V(help_text_string, "helpText") \

V(homedir_string, "homedir") \

V(host_string, "host") \

V(hostmaster_string, "hostmaster") \

V(http_1_1_string, "http/1.1") \

V(ignore_string, "ignore") \

V(infoaccess_string, "infoAccess") \

V(inherit_string, "inherit") \

V(input_string, "input") \

V(internal_binding_string, "internalBinding") \

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(kind_string, "kind") \

V(library_string, "library") \

V(mac_string, "mac") \

V(main_string, "main") \

V(max_buffer_string, "maxBuffer") \

V(message_port_constructor_string, "MessagePort") \

V(message_port_string, "messagePort") \

V(message_string, "message") \

V(minttl_string, "minttl") \

V(module_string, "module") \

V(modulus_string, "modulus") \

V(name_string, "name") \

V(netmask_string, "netmask") \

V(next_string, "next") \

V(nistcurve_string, "nistCurve") \

V(nsname_string, "nsname") \

V(ocsp_request_string, "OCSPRequest") \

V(oncertcb_string, "oncertcb") \

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(onhandshakedone_string, "onhandshakedone") \

V(onhandshakestart_string, "onhandshakestart") \

V(onkeylog_string, "onkeylog") \

V(onmessage_string, "onmessage") \

V(onnewsession_string, "onnewsession") \

V(onocspresponse_string, "onocspresponse") \

V(onreadstart_string, "onreadstart") \

V(onreadstop_string, "onreadstop") \

V(onshutdown_string, "onshutdown") \

V(onsignal_string, "onsignal") \

V(onunpipe_string, "onunpipe") \

V(onwrite_string, "onwrite") \

V(openssl_error_stack, "opensslErrorStack") \

V(options_string, "options") \

V(order_string, "order") \

V(output_string, "output") \

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_source_string, "pipeSource") \

V(pipe_string, "pipe") \

V(pipe_target_string, "pipeTarget") \

V(port1_string, "port1") \

V(port2_string, "port2") \

V(port_string, "port") \

V(preference_string, "preference") \

V(primordials_string, "primordials") \

V(priority_string, "priority") \

V(process_string, "process") \

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(reason_string, "reason") \

V(refresh_string, "refresh") \

V(regexp_string, "regexp") \

V(rename_string, "rename") \

V(replacement_string, "replacement") \

V(require_string, "require") \

V(retry_string, "retry") \

V(scheme_string, "scheme") \

V(scopeid_string, "scopeid") \

V(serial_number_string, "serialNumber") \

V(serial_string, "serial") \

V(servername_string, "servername") \

V(service_string, "service") \

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(start_time_string, "startTime") \

V(status_string, "status") \

V(stdio_string, "stdio") \

V(subject_string, "subject") \

V(subjectaltname_string, "subjectaltname") \

V(syscall_string, "syscall") \

V(target_string, "target") \

V(thread_id_string, "threadId") \

V(ticketkeycallback_string, "onticketkeycallback") \

V(timeout_string, "timeout") \

V(tls_ticket_string, "tlsTicket") \

V(transfer_string, "transfer") \

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_TEMPLATES(V) \

V(as_callback_data_template, v8::FunctionTemplate) \

V(async_wrap_ctor_template, v8::FunctionTemplate) \

V(async_wrap_object_ctor_template, v8::FunctionTemplate) \

V(compiled_fn_entry_template, v8::ObjectTemplate) \

V(fd_constructor_template, v8::ObjectTemplate) \

V(fdclose_constructor_template, v8::ObjectTemplate) \

V(filehandlereadwrap_template, v8::ObjectTemplate) \

V(fsreqpromise_constructor_template, v8::ObjectTemplate) \

V(handle_wrap_ctor_template, v8::FunctionTemplate) \

V(http2settings_constructor_template, v8::ObjectTemplate) \

V(http2stream_constructor_template, v8::ObjectTemplate) \

V(http2ping_constructor_template, v8::ObjectTemplate) \

V(libuv_stream_wrap_ctor_template, v8::FunctionTemplate) \

V(message_event_object_template, v8::ObjectTemplate) \

V(message_port_constructor_template, v8::FunctionTemplate) \

V(pipe_constructor_template, v8::FunctionTemplate) \

V(promise_wrap_template, v8::ObjectTemplate) \

V(sab_lifetimepartner_constructor_template, v8::FunctionTemplate) \

V(script_context_constructor_template, v8::FunctionTemplate) \

V(secure_context_constructor_template, v8::FunctionTemplate) \

V(shutdown_wrap_template, v8::ObjectTemplate) \

V(streambaseoutputstream_constructor_template, v8::ObjectTemplate) \

V(tcp_constructor_template, v8::FunctionTemplate) \

V(tty_constructor_template, v8::FunctionTemplate) \

V(write_wrap_template, v8::ObjectTemplate)

#define ENVIRONMENT_STRONG_PERSISTENT_VALUES(V) \

V(as_callback_data, v8::Object) \

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(buffer_prototype_object, v8::Object) \

V(crypto_key_object_constructor, v8::Function) \

V(domain_callback, v8::Function) \

V(domexception_function, v8::Function) \

V(enhance_fatal_stack_after_inspector, v8::Function) \

V(enhance_fatal_stack_before_inspector, v8::Function) \

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(http2session_on_altsvc_function, v8::Function) \

V(http2session_on_error_function, v8::Function) \

V(http2session_on_frame_error_function, v8::Function) \

V(http2session_on_goaway_data_function, v8::Function) \

V(http2session_on_headers_function, v8::Function) \

V(http2session_on_origin_function, v8::Function) \

V(http2session_on_ping_function, v8::Function) \

V(http2session_on_priority_function, v8::Function) \

V(http2session_on_settings_function, v8::Function) \

V(http2session_on_stream_close_function, v8::Function) \

V(http2session_on_stream_trailers_function, v8::Function) \

V(internal_binding_loader, v8::Function) \

V(immediate_callback_function, v8::Function) \

V(inspector_console_extension_installer, v8::Function) \

V(message_port, v8::Object) \

V(native_module_require, v8::Function) \

V(performance_entry_callback, v8::Function) \

V(performance_entry_template, v8::Function) \

V(prepare_stack_trace_callback, v8::Function) \

V(process_object, v8::Object) \

V(primordials, v8::Object) \

V(promise_reject_callback, v8::Function) \

V(script_data_constructor_function, v8::Function) \

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(udp_constructor_function, v8::Function) \

V(url_constructor_function, v8::Function)

class Environment;

class IsolateData : public MemoryRetainer {

public:

IsolateData(v8::Isolate* isolate,

uv_loop_t* event_loop,

MultiIsolatePlatform* platform = nullptr,

ArrayBufferAllocator* node_allocator = nullptr,

const std::vector<size_t>* indexes = nullptr);

SET_MEMORY_INFO_NAME(IsolateData)

SET_SELF_SIZE(IsolateData)

void MemoryInfo(MemoryTracker* tracker) const override;

std::vector<size_t> Serialize(v8::SnapshotCreator* creator);

inline uv_loop_t* event_loop() const;

inline MultiIsolatePlatform* platform() const;

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

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

inline bool uses_node_allocator() const;

inline v8::ArrayBuffer::Allocator* allocator() const;

inline NodeArrayBufferAllocator* node_allocator() 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 VY

#undef VS

#undef VP

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

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 std::vector<size_t>* indexes);

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 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 VY

#undef VS

#undef VP

v8::Isolate* const isolate_;

uv_loop_t* const event_loop_;

v8::ArrayBuffer::Allocator* const allocator_;

NodeArrayBufferAllocator* const node_allocator_;

const bool uses_node_allocator_;

MultiIsolatePlatform* platform_;

std::shared_ptr<PerIsolateOptions> options_;

};

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) \

V(INSPECTOR_PROFILER)

enum class DebugCategory {

#define V(name) name,

DEBUG_CATEGORY_NAMES(V)

#undef V

CATEGORY_COUNT

};

// A unique-pointer-ish object that is compatible with the JS engine's

// ArrayBuffer::Allocator.

struct AllocatedBuffer {

public:

explicit inline AllocatedBuffer(Environment* env = nullptr);

inline AllocatedBuffer(Environment* env, uv_buf_t buf);

inline ~AllocatedBuffer();

inline void Resize(size_t len);

inline uv_buf_t release();

inline char* data();

inline const char* data() const;

inline size_t size() const;

inline void clear();

inline v8::MaybeLocal<v8::Object> ToBuffer();

inline v8::Local<v8::ArrayBuffer> ToArrayBuffer();

inline AllocatedBuffer(AllocatedBuffer&& other);

inline AllocatedBuffer& operator=(AllocatedBuffer&& other);

AllocatedBuffer(const AllocatedBuffer& other) = delete;

AllocatedBuffer& operator=(const AllocatedBuffer& other) = delete;

private:

Environment* env_;

// We do not pass this to libuv directly, but uv_buf_t is a convenient way

// to represent a chunk of memory, and plays nicely with other parts of core.

uv_buf_t buffer_;

friend class Environment;

};

class AsyncRequest : public MemoryRetainer {

public:

AsyncRequest() = default;

~AsyncRequest();

AsyncRequest(const AsyncRequest&) = delete;

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

AsyncRequest(AsyncRequest&&) = delete;

AsyncRequest& operator=(AsyncRequest&&) = delete;

void Install(Environment* env, void* data, uv_async_cb target);

void Uninstall();

void Stop();

inline void set_stopped(bool flag);

inline bool is_stopped() const;

uv_async_t* GetHandle();

void MemoryInfo(MemoryTracker* tracker) const override;

SET_MEMORY_INFO_NAME(AsyncRequest)

SET_SELF_SIZE(AsyncRequest)

private:

Environment* env_;

uv_async_t* async_ = nullptr;

std::atomic_bool stopped_ {true};

};

class KVStore {

public:

KVStore() = default;

virtual ~KVStore() = default;

KVStore(const KVStore&) = delete;

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

KVStore(KVStore&&) = delete;

KVStore& operator=(KVStore&&) = delete;

virtual v8::MaybeLocal<v8::String> Get(v8::Isolate* isolate,

v8::Local<v8::String> key) const = 0;

virtual void Set(v8::Isolate* isolate,

v8::Local<v8::String> key,

v8::Local<v8::String> value) = 0;

virtual int32_t Query(v8::Isolate* isolate,

v8::Local<v8::String> key) const = 0;

virtual void Delete(v8::Isolate* isolate, v8::Local<v8::String> key) = 0;

virtual v8::Local<v8::Array> Enumerate(v8::Isolate* isolate) const = 0;

virtual std::shared_ptr<KVStore> Clone(v8::Isolate* isolate) const;

virtual v8::Maybe<bool> AssignFromObject(v8::Local<v8::Context> context,

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

static std::shared_ptr<KVStore> CreateMapKVStore();

};

namespace per_process {

extern std::shared_ptr<KVStore> system_environment;

}

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,

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::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.

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_;

};

private:

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

inline AsyncHooks();

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

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

// 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();

};

class AsyncCallbackScope {

public:

AsyncCallbackScope() = delete;

explicit AsyncCallbackScope(Environment* env);

~AsyncCallbackScope();

AsyncCallbackScope(const AsyncCallbackScope&) = delete;

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

AsyncCallbackScope(AsyncCallbackScope&&) = delete;

AsyncCallbackScope& operator=(AsyncCallbackScope&&) = delete;

private:

Environment* env_;

};

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 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);

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;

private:

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

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

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;

private:

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

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

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_;

};

class CleanupHookCallback {

public:

CleanupHookCallback(void (*fn)(void*),

void* arg,

uint64_t insertion_order_counter)

: fn_(fn), arg_(arg), insertion_order_counter_(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;

};

// Compares by `fn_` and `arg_` being equal.

struct Equal {

inline bool operator()(const CleanupHookCallback& a,

const CleanupHookCallback& b) const;

};

inline BaseObject* GetBaseObject() const;

private:

friend class Environment;

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_;

};

class Environment : public MemoryRetainer {

public:

Environment(const Environment&) = delete;

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

Environment(Environment&&) = delete;

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

SET_MEMORY_INFO_NAME(Environment)

inline size_t SelfSize() const override;

bool IsRootNode() const override { return true; }

void MemoryInfo(MemoryTracker* tracker) const override;

void CreateProperties();

// Should be called before InitializeInspector()

void InitializeDiagnostics();

#if HAVE_INSPECTOR && NODE_USE_V8_PLATFORM

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

// the ownership if transferred into the Environment.

int InitializeInspector(inspector::ParentInspectorHandle* parent_handle);

#endif

v8::MaybeLocal<v8::Value> BootstrapInternalLoaders();

v8::MaybeLocal<v8::Value> BootstrapNode();

v8::MaybeLocal<v8::Value> RunBootstrapping();

inline size_t async_callback_scope_depth() const;

inline void PushAsyncCallbackScope();

inline void PopAsyncCallbackScope();

enum Flags {

kNoFlags = 0,

kIsMainThread = 1 << 0,

kOwnsProcessState = 1 << 1,

kOwnsInspector = 1 << 2,

};

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 inline Environment* GetFromCallbackData(v8::Local<v8::Value> val);

static uv_key_t thread_local_env;

static inline Environment* GetThreadLocalEnv();

Environment(IsolateData* isolate_data,

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

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

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

Flags flags = Flags(),

uint64_t thread_id = kNoThreadId);

~Environment();

void InitializeLibuv(bool start_profiler_idle_notifier);

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

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

const std::string& exec_path() const;

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);

void ExitEnv();

// 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 uv_loop_t* event_loop() const;

inline 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 TickInfo* tick_info();

inline uint64_t timer_base() const;

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

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

inline IsolateData* isolate_data() const;

// Utilities that allocate memory using the Isolate's ArrayBuffer::Allocator.

// In particular, using AllocateManaged() will provide a RAII-style object

// with easy conversion to `Buffer` and `ArrayBuffer` objects.

inline AllocatedBuffer AllocateManaged(size_t size, bool checked = true);

inline char* Allocate(size_t size);

inline char* AllocateUnchecked(size_t size);

char* Reallocate(char* data, size_t old_size, size_t size);

inline void Free(char* data, size_t size);

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 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();