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env.h
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env.h
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// 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_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;
}
namespace fs {
class FileHandleReadWrap;
}
namespace performance {
class performance_state;
}
namespace tracing {
class AgentWriterHandle;
}
#if HAVE_INSPECTOR
namespace profiler {
class V8CoverageConnection;
} // namespace profiler
#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;
};
} // namespace loader
// 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 kFsStatsFieldsNumber = 14;
constexpr size_t kFsStatsBufferLength = 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_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(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(change_string, "change") \
V(channel_string, "channel") \
V(chunks_sent_since_last_write_string, "chunksSentSinceLastWrite") \
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(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(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(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(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(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_callback_data_template, v8::FunctionTemplate) \
V(async_wrap_ctor_template, v8::FunctionTemplate) \
V(async_wrap_object_ctor_template, v8::FunctionTemplate) \
V(context, v8::Context) \
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(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_select_padding_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(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);
SET_MEMORY_INFO_NAME(IsolateData);
SET_SELF_SIZE(IsolateData);
void MemoryInfo(MemoryTracker* tracker) const override;
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;
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 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;
};
struct CompileFnEntry {
Environment* env;
uint32_t id;
CompileFnEntry(Environment* env, uint32_t id);
};
// 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() {}
~AsyncRequest();
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:
virtual v8::Local<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 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.
AsyncHooks(const AsyncHooks&) = delete;
AsyncHooks& operator=(const AsyncHooks&) = delete;
// 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;
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.
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();
};
class AsyncCallbackScope {
public:
AsyncCallbackScope() = delete;
explicit AsyncCallbackScope(Environment* env);
~AsyncCallbackScope();
AsyncCallbackScope(const AsyncCallbackScope&) = delete;
AsyncCallbackScope& operator=(const AsyncCallbackScope&) = delete;
private:
Environment* env_;
};
class ImmediateInfo : public MemoryRetainer {
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);
ImmediateInfo(const ImmediateInfo&) = delete;
ImmediateInfo& operator=(const ImmediateInfo&) = delete;
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 };
AliasedBuffer<uint32_t, v8::Uint32Array> fields_;
};
class TickInfo : public MemoryRetainer {
public:
inline AliasedBuffer<uint8_t, v8::Uint8Array>& 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;
private:
friend class Environment; // So we can call the constructor.
inline explicit TickInfo(v8::Isolate* isolate);
enum Fields { kHasTickScheduled = 0, kHasRejectionToWarn, kFieldsCount };
AliasedBuffer<uint8_t, v8::Uint8Array> 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();
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;
SET_MEMORY_INFO_NAME(Environment);
inline size_t SelfSize() const override;
bool IsRootNode() const override { return true; }
void MemoryInfo(MemoryTracker* tracker) const override;
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,
Flags flags = Flags(),
uint64_t thread_id = kNoThreadId);
~Environment();
void InitializeLibuv(bool start_profiler_idle_notifier);
v8::MaybeLocal<v8::Object> ProcessCliArgs(
const std::vector<std::string>& args,
const std::vector<std::string>& exec_args);
inline const std::vector<std::string>& exec_argv();
inline const std::vector<std::string>& argv();
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;
// Utilites 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 AliasedBuffer<uint32_t, v8::Uint32Array>&
should_abort_on_uncaught_toggle();
inline AliasedBuffer<int32_t, v8::Int32Array>& 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();
std::set<std::string> native_modules_with_cache;
std::set<std::string> native_modules_without_cache;
std::unordered_multimap<int, loader::ModuleWrap*> hash_to_module_map;
std::unordered_map<uint32_t, loader::ModuleWrap*> id_to_module_map;
std::unordered_map<uint32_t, contextify::ContextifyScript*>
id_to_script_map;
std::unordered_set<CompileFnEntry*> compile_fn_entries;
std::unordered_map<uint32_t, Persistent<v8::Function>> id_to_function_map;
inline uint32_t get_next_module_id();
inline uint32_t get_next_script_id();
inline uint32_t get_next_function_id();
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();
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 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 has_run_bootstrapping_code() const;
inline void set_has_run_bootstrapping_code(bool has_run_bootstrapping_code);
inline bool has_serialized_options() const;
inline void set_has_serialized_options(bool has_serialized_options);
static uint64_t AllocateThreadId();
static constexpr uint64_t kNoThreadId = -1;
inline bool is_main_thread() const;
inline bool owns_process_state() const;
inline bool owns_inspector() const;
inline uint64_t thread_id() const;
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() 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,