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//
// This file is invoked by `node::RunBootstrapping()` in `src/node.cc`, and is
// responsible for setting up node.js core before executing main scripts
// under `lib/internal/main/`.
//
// This file is expected not to perform any asynchronous operations itself
// when being executed - those should be done in either
// `lib/internal/bootstrap/pre_execution.js` or in main scripts. The majority
// of the code here focuses on setting up the global proxy and the process
// object in a synchronous manner.
// As special caution is given to the performance of the startup process,
// many dependencies are invoked lazily.
//
// Scripts run before this file:
// - `lib/internal/per_context/primordials.js`: to save copies of JavaScript
// builtins that won't be affected by user land monkey-patching for internal
// modules to use.
// - `lib/internal/bootstrap/loaders.js`: to setup internal binding and
// module loaders, including `process.binding()`, `process._linkedBinding()`,
// `internalBinding()` and `NativeModule`.
//
// This file is run to bootstrap both the main thread and the worker threads.
// After this file is run, certain properties are setup according to the
// configuration of the Node.js instance using the files in
// `lib/internal/bootstrap/switches/`.
//
// Then, depending on how the Node.js instance is launched, one of the main
// scripts in `lib/internal/main` will be selected by C++ to start the actual
// execution. They may run additional setups exported by
// `lib/internal/bootstrap/pre_execution.js` depending on the runtime states.
'use strict';
// This file is compiled as if it's wrapped in a function with arguments
// passed by node::RunBootstrapping()
/* global process, require, internalBinding, primordials */
setupPrepareStackTrace();
const {
Array,
ArrayPrototypeConcat,
ArrayPrototypeFill,
FunctionPrototypeCall,
JSONParse,
ObjectDefineProperty,
ObjectGetPrototypeOf,
ObjectPreventExtensions,
ObjectSetPrototypeOf,
ReflectGet,
ReflectSet,
SymbolToStringTag,
globalThis,
} = primordials;
const config = internalBinding('config');
const internalTimers = require('internal/timers');
const {
defineOperation,
deprecate,
exposeInterface,
} = require('internal/util');
setupProcessObject();
setupGlobalProxy();
setupBuffer();
process.domain = null;
process._exiting = false;
// process.config is serialized config.gypi
const nativeModule = internalBinding('native_module');
// TODO(@jasnell): Once this has gone through one full major
// release cycle, remove the Proxy and setter and update the
// getter to either return a read-only object or always return
// a freshly parsed version of nativeModule.config.
const deprecationHandler = {
warned: false,
message: 'Setting process.config is deprecated. ' +
'In the future the property will be read-only.',
code: 'DEP0150',
maybeWarn() {
if (!this.warned) {
process.emitWarning(this.message, {
type: 'DeprecationWarning',
code: this.code
});
this.warned = true;
}
},
defineProperty(target, key, descriptor) {
this.maybeWarn();
return ObjectDefineProperty(target, key, descriptor);
},
deleteProperty(target, key) {
this.maybeWarn();
delete target[key];
},
preventExtensions(target) {
this.maybeWarn();
return ObjectPreventExtensions(target);
},
set(target, key, value) {
this.maybeWarn();
return ReflectSet(target, key, value);
},
get(target, key, receiver) {
const val = ReflectGet(target, key, receiver);
if (val != null && typeof val === 'object') {
// eslint-disable-next-line node-core/prefer-primordials
return new Proxy(val, deprecationHandler);
}
return val;
},
setPrototypeOf(target, proto) {
this.maybeWarn();
return ObjectSetPrototypeOf(target, proto);
}
};
// eslint-disable-next-line node-core/prefer-primordials
let processConfig = new Proxy(
JSONParse(nativeModule.config),
deprecationHandler);
ObjectDefineProperty(process, 'config', {
__proto__: null,
enumerable: true,
configurable: true,
get() { return processConfig; },
set(value) {
deprecationHandler.maybeWarn();
processConfig = value;
}
});
require('internal/worker/js_transferable').setup();
// Bootstrappers for all threads, including worker threads and main thread
const perThreadSetup = require('internal/process/per_thread');
const rawMethods = internalBinding('process_methods');
// Set up methods on the process object for all threads
{
process.dlopen = rawMethods.dlopen;
process.uptime = rawMethods.uptime;
// TODO(joyeecheung): either remove them or make them public
process._getActiveRequests = rawMethods._getActiveRequests;
process._getActiveHandles = rawMethods._getActiveHandles;
process.getActiveResourcesInfo = function() {
const timerCounts = internalTimers.getTimerCounts();
return ArrayPrototypeConcat(
rawMethods._getActiveRequestsInfo(),
rawMethods._getActiveHandlesInfo(),
ArrayPrototypeFill(new Array(timerCounts.timeoutCount), 'Timeout'),
ArrayPrototypeFill(new Array(timerCounts.immediateCount), 'Immediate'));
};
// TODO(joyeecheung): remove these
process.reallyExit = rawMethods.reallyExit;
process._kill = rawMethods._kill;
const wrapped = perThreadSetup.wrapProcessMethods(rawMethods);
process._rawDebug = wrapped._rawDebug;
process.cpuUsage = wrapped.cpuUsage;
process.resourceUsage = wrapped.resourceUsage;
process.memoryUsage = wrapped.memoryUsage;
process.kill = wrapped.kill;
process.exit = wrapped.exit;
process.hrtime = perThreadSetup.hrtime;
process.hrtime.bigint = perThreadSetup.hrtimeBigInt;
process.openStdin = function() {
process.stdin.resume();
return process.stdin;
};
}
const credentials = internalBinding('credentials');
if (credentials.implementsPosixCredentials) {
process.getuid = credentials.getuid;
process.geteuid = credentials.geteuid;
process.getgid = credentials.getgid;
process.getegid = credentials.getegid;
process.getgroups = credentials.getgroups;
}
// Setup the callbacks that node::AsyncWrap will call when there are hooks to
// process. They use the same functions as the JS embedder API. These callbacks
// are setup immediately to prevent async_wrap.setupHooks() from being hijacked
// and the cost of doing so is negligible.
const { nativeHooks } = require('internal/async_hooks');
internalBinding('async_wrap').setupHooks(nativeHooks);
const {
setupTaskQueue,
queueMicrotask
} = require('internal/process/task_queues');
// Non-standard extensions:
const { BroadcastChannel } = require('internal/worker/io');
exposeInterface(globalThis, 'BroadcastChannel', BroadcastChannel);
defineOperation(globalThis, 'queueMicrotask', queueMicrotask);
const timers = require('timers');
defineOperation(globalThis, 'clearImmediate', timers.clearImmediate);
defineOperation(globalThis, 'setImmediate', timers.setImmediate);
const {
structuredClone,
} = require('internal/structured_clone');
defineOperation(globalThis, 'structuredClone', structuredClone);
// Set the per-Environment callback that will be called
// when the TrackingTraceStateObserver updates trace state.
// Note that when NODE_USE_V8_PLATFORM is true, the observer is
// attached to the per-process TracingController.
const { setTraceCategoryStateUpdateHandler } = internalBinding('trace_events');
setTraceCategoryStateUpdateHandler(perThreadSetup.toggleTraceCategoryState);
// process.allowedNodeEnvironmentFlags
ObjectDefineProperty(process, 'allowedNodeEnvironmentFlags', {
__proto__: null,
get() {
const flags = perThreadSetup.buildAllowedFlags();
process.allowedNodeEnvironmentFlags = flags;
return process.allowedNodeEnvironmentFlags;
},
// If the user tries to set this to another value, override
// this completely to that value.
set(value) {
ObjectDefineProperty(this, 'allowedNodeEnvironmentFlags', {
__proto__: null,
value,
configurable: true,
enumerable: true,
writable: true
});
},
enumerable: true,
configurable: true
});
// process.assert
process.assert = deprecate(
perThreadSetup.assert,
'process.assert() is deprecated. Please use the `assert` module instead.',
'DEP0100');
// TODO(joyeecheung): this property has not been well-maintained, should we
// deprecate it in favor of a better API?
const { isDebugBuild, hasOpenSSL, hasInspector } = config;
const features = {
inspector: hasInspector,
debug: isDebugBuild,
uv: true,
ipv6: true, // TODO(bnoordhuis) ping libuv
tls_alpn: hasOpenSSL,
tls_sni: hasOpenSSL,
tls_ocsp: hasOpenSSL,
tls: hasOpenSSL,
// This needs to be dynamic because --no-node-snapshot disables the
// code cache even if the binary is built with embedded code cache.
get cached_builtins() {
return nativeModule.hasCachedBuiltins();
}
};
ObjectDefineProperty(process, 'features', {
__proto__: null,
enumerable: true,
writable: false,
configurable: false,
value: features
});
{
const {
onGlobalUncaughtException,
setUncaughtExceptionCaptureCallback,
hasUncaughtExceptionCaptureCallback
} = require('internal/process/execution');
// For legacy reasons this is still called `_fatalException`, even
// though it is now a global uncaught exception handler.
// The C++ land node::errors::TriggerUncaughtException grabs it
// from the process object because it has been monkey-patchable.
// TODO(joyeecheung): investigate whether process._fatalException
// can be deprecated.
process._fatalException = onGlobalUncaughtException;
process.setUncaughtExceptionCaptureCallback =
setUncaughtExceptionCaptureCallback;
process.hasUncaughtExceptionCaptureCallback =
hasUncaughtExceptionCaptureCallback;
}
const { emitWarning } = require('internal/process/warning');
process.emitWarning = emitWarning;
// We initialize the tick callbacks and the timer callbacks last during
// bootstrap to make sure that any operation done before this are synchronous.
// If any ticks or timers are scheduled before this they are unlikely to work.
{
const { nextTick, runNextTicks } = setupTaskQueue();
process.nextTick = nextTick;
// Used to emulate a tick manually in the JS land.
// A better name for this function would be `runNextTicks` but
// it has been exposed to the process object so we keep this legacy name
// TODO(joyeecheung): either remove it or make it public
process._tickCallback = runNextTicks;
const { setupTimers } = internalBinding('timers');
const {
processImmediate,
processTimers,
} = internalTimers.getTimerCallbacks(runNextTicks);
// Sets two per-Environment callbacks that will be run from libuv:
// - processImmediate will be run in the callback of the per-Environment
// check handle.
// - processTimers will be run in the callback of the per-Environment timer.
setupTimers(processImmediate, processTimers);
// Note: only after this point are the timers effective
}
// Preload modules so that they are included in the builtin snapshot.
require('fs');
require('v8');
require('vm');
require('url');
require('internal/options');
if (config.hasOpenSSL) {
require('crypto');
}
function setupPrepareStackTrace() {
const {
setEnhanceStackForFatalException,
setPrepareStackTraceCallback
} = internalBinding('errors');
const {
prepareStackTrace,
fatalExceptionStackEnhancers: {
beforeInspector,
afterInspector
}
} = require('internal/errors');
// Tell our PrepareStackTraceCallback passed to the V8 API
// to call prepareStackTrace().
setPrepareStackTraceCallback(prepareStackTrace);
// Set the function used to enhance the error stack for printing
setEnhanceStackForFatalException(beforeInspector, afterInspector);
}
function setupProcessObject() {
const EventEmitter = require('events');
const origProcProto = ObjectGetPrototypeOf(process);
ObjectSetPrototypeOf(origProcProto, EventEmitter.prototype);
FunctionPrototypeCall(EventEmitter, process);
ObjectDefineProperty(process, SymbolToStringTag, {
__proto__: null,
enumerable: false,
writable: true,
configurable: false,
value: 'process'
});
// Create global.process as getters so that we have a
// deprecation path for these in ES Modules.
// See https://github.com/nodejs/node/pull/26334.
let _process = process;
ObjectDefineProperty(globalThis, 'process', {
__proto__: null,
get() {
return _process;
},
set(value) {
_process = value;
},
enumerable: false,
configurable: true,
});
}
function setupGlobalProxy() {
ObjectDefineProperty(globalThis, SymbolToStringTag, {
__proto__: null,
value: 'global',
writable: false,
enumerable: false,
configurable: true
});
}
function setupBuffer() {
const {
Buffer,
} = require('buffer');
const bufferBinding = internalBinding('buffer');
// Only after this point can C++ use Buffer::New()
bufferBinding.setBufferPrototype(Buffer.prototype);
delete bufferBinding.setBufferPrototype;
delete bufferBinding.zeroFill;
// Create global.Buffer as getters so that we have a
// deprecation path for these in ES Modules.
// See https://github.com/nodejs/node/pull/26334.
let _Buffer = Buffer;
ObjectDefineProperty(globalThis, 'Buffer', {
__proto__: null,
get() {
return _Buffer;
},
set(value) {
_Buffer = value;
},
enumerable: false,
configurable: true,
});
}
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