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const {
NumberParseInt,
ObjectDefineProperties,
ObjectDefineProperty,
ObjectGetOwnPropertyDescriptor,
SafeMap,
SafeWeakMap,
StringPrototypeStartsWith,
globalThis,
} = primordials;
const {
getOptionValue,
getEmbedderOptions,
} = require('internal/options');
const { reconnectZeroFillToggle } = require('internal/buffer');
const {
defineOperation,
emitExperimentalWarning,
exposeInterface,
} = require('internal/util');
const { Buffer } = require('buffer');
const { ERR_MANIFEST_ASSERT_INTEGRITY } = require('internal/errors').codes;
const assert = require('internal/assert');
function prepareMainThreadExecution(expandArgv1 = false) {
// TODO(joyeecheung): this is also necessary for workers when they deserialize
// this toggle from the snapshot.
reconnectZeroFillToggle();
// Patch the process object with legacy properties and normalizations
patchProcessObject(expandArgv1);
setupTraceCategoryState();
setupPerfHooks();
setupInspectorHooks();
setupWarningHandler();
setupFetch();
setupWebCrypto();
// Resolve the coverage directory to an absolute path, and
// overwrite process.env so that the original path gets passed
// to child processes even when they switch cwd.
if (process.env.NODE_V8_COVERAGE) {
process.env.NODE_V8_COVERAGE =
setupCoverageHooks(process.env.NODE_V8_COVERAGE);
}
setupDebugEnv();
// Print stack trace on `SIGINT` if option `--trace-sigint` presents.
setupStacktracePrinterOnSigint();
// Process initial diagnostic reporting configuration, if present.
initializeReport();
initializeReportSignalHandlers(); // Main-thread-only.
initializeHeapSnapshotSignalHandlers();
// If the process is spawned with env NODE_CHANNEL_FD, it's probably
// spawned by our child_process module, then initialize IPC.
// This attaches some internal event listeners and creates:
// process.send(), process.channel, process.connected,
// process.disconnect().
setupChildProcessIpcChannel();
// Load policy from disk and parse it.
initializePolicy();
// If this is a worker in cluster mode, start up the communication
// channel. This needs to be done before any user code gets executed
// (including preload modules).
initializeClusterIPC();
initializeSourceMapsHandlers();
initializeDeprecations();
initializeWASI();
initializeCJSLoader();
initializeESMLoader();
const CJSLoader = require('internal/modules/cjs/loader');
assert(!CJSLoader.hasLoadedAnyUserCJSModule);
loadPreloadModules();
initializeFrozenIntrinsics();
}
function patchProcessObject(expandArgv1) {
const binding = internalBinding('process_methods');
binding.patchProcessObject(process);
require('internal/process/per_thread').refreshHrtimeBuffer();
ObjectDefineProperty(process, 'argv0', {
enumerable: true,
configurable: false,
value: process.argv[0]
});
process.argv[0] = process.execPath;
if (expandArgv1 && process.argv[1] &&
!StringPrototypeStartsWith(process.argv[1], '-')) {
// Expand process.argv[1] into a full path.
const path = require('path');
try {
process.argv[1] = path.resolve(process.argv[1]);
} catch {
// Continue regardless of error.
}
}
// TODO(joyeecheung): most of these should be deprecated and removed,
// except some that we need to be able to mutate during run time.
addReadOnlyProcessAlias('_eval', '--eval');
addReadOnlyProcessAlias('_print_eval', '--print');
addReadOnlyProcessAlias('_syntax_check_only', '--check');
addReadOnlyProcessAlias('_forceRepl', '--interactive');
addReadOnlyProcessAlias('_preload_modules', '--require');
addReadOnlyProcessAlias('noDeprecation', '--no-deprecation');
addReadOnlyProcessAlias('noProcessWarnings', '--no-warnings');
addReadOnlyProcessAlias('traceProcessWarnings', '--trace-warnings');
addReadOnlyProcessAlias('throwDeprecation', '--throw-deprecation');
addReadOnlyProcessAlias('profProcess', '--prof-process');
addReadOnlyProcessAlias('traceDeprecation', '--trace-deprecation');
addReadOnlyProcessAlias('_breakFirstLine', '--inspect-brk', false);
addReadOnlyProcessAlias('_breakNodeFirstLine', '--inspect-brk-node', false);
}
function addReadOnlyProcessAlias(name, option, enumerable = true) {
const value = getOptionValue(option);
if (value) {
ObjectDefineProperty(process, name, {
writable: false,
configurable: true,
enumerable,
value
});
}
}
function setupWarningHandler() {
const {
onWarning
} = require('internal/process/warning');
if (getOptionValue('--warnings') &&
process.env.NODE_NO_WARNINGS !== '1') {
process.on('warning', onWarning);
}
}
// https://fetch.spec.whatwg.org/
function setupFetch() {
if (process.config.variables.node_no_browser_globals ||
getOptionValue('--no-experimental-fetch')) {
return;
}
let undici;
function lazyUndici() {
if (undici) {
return undici;
}
emitExperimentalWarning('The Fetch API');
undici = require('internal/deps/undici/undici');
return undici;
}
async function fetch(input, init = undefined) {
return lazyUndici().fetch(input, init);
}
defineOperation(globalThis, 'fetch', fetch);
function lazyInterface(name) {
return {
configurable: true,
enumerable: false,
get() {
return lazyUndici()[name];
},
set(value) {
exposeInterface(globalThis, name, value);
}
};
}
ObjectDefineProperties(globalThis, {
FormData: lazyInterface('FormData'),
Headers: lazyInterface('Headers'),
Request: lazyInterface('Request'),
Response: lazyInterface('Response'),
});
}
// TODO(aduh95): move this to internal/bootstrap/browser when the CLI flag is
// removed.
function setupWebCrypto() {
if (process.config.variables.node_no_browser_globals ||
!getOptionValue('--experimental-global-webcrypto')) {
return;
}
let webcrypto;
ObjectDefineProperty(globalThis, 'crypto',
ObjectGetOwnPropertyDescriptor({
get crypto() {
webcrypto ??= require('internal/crypto/webcrypto');
return webcrypto.crypto;
}
}, 'crypto'));
if (internalBinding('config').hasOpenSSL) {
webcrypto ??= require('internal/crypto/webcrypto');
exposeInterface(globalThis, 'Crypto', webcrypto.Crypto);
exposeInterface(globalThis, 'CryptoKey', webcrypto.CryptoKey);
exposeInterface(globalThis, 'SubtleCrypto', webcrypto.SubtleCrypto);
}
}
// Setup User-facing NODE_V8_COVERAGE environment variable that writes
// ScriptCoverage to a specified file.
function setupCoverageHooks(dir) {
const cwd = require('internal/process/execution').tryGetCwd();
const { resolve } = require('path');
const coverageDirectory = resolve(cwd, dir);
const { sourceMapCacheToObject } =
require('internal/source_map/source_map_cache');
if (process.features.inspector) {
internalBinding('profiler').setCoverageDirectory(coverageDirectory);
internalBinding('profiler').setSourceMapCacheGetter(sourceMapCacheToObject);
} else {
process.emitWarning('The inspector is disabled, ' +
'coverage could not be collected',
'Warning');
return '';
}
return coverageDirectory;
}
function setupStacktracePrinterOnSigint() {
if (!getOptionValue('--trace-sigint')) {
return;
}
const { SigintWatchdog } = require('internal/watchdog');
const watchdog = new SigintWatchdog();
watchdog.start();
}
function initializeReport() {
const { report } = require('internal/process/report');
ObjectDefineProperty(process, 'report', {
enumerable: true,
configurable: true,
get() {
return report;
}
});
}
function setupDebugEnv() {
require('internal/util/debuglog').initializeDebugEnv(process.env.NODE_DEBUG);
if (getOptionValue('--expose-internals')) {
require('internal/bootstrap/loaders').NativeModule.exposeInternals();
}
}
// This has to be called after initializeReport() is called
function initializeReportSignalHandlers() {
const { addSignalHandler } = require('internal/process/report');
addSignalHandler();
}
function initializeHeapSnapshotSignalHandlers() {
const signal = getOptionValue('--heapsnapshot-signal');
if (!signal)
return;
require('internal/validators').validateSignalName(signal);
const { writeHeapSnapshot } = require('v8');
process.on(signal, () => {
writeHeapSnapshot();
});
}
function setupTraceCategoryState() {
const { isTraceCategoryEnabled } = internalBinding('trace_events');
const { toggleTraceCategoryState } = require('internal/process/per_thread');
toggleTraceCategoryState(isTraceCategoryEnabled('node.async_hooks'));
}
function setupPerfHooks() {
require('internal/perf/performance').refreshTimeOrigin();
require('internal/perf/utils').refreshTimeOrigin();
}
function setupInspectorHooks() {
// If Debugger.setAsyncCallStackDepth is sent during bootstrap,
// we cannot immediately call into JS to enable the hooks, which could
// interrupt the JS execution of bootstrap. So instead we save the
// notification in the inspector agent if it's sent in the middle of
// bootstrap, and process the notification later here.
if (internalBinding('config').hasInspector) {
const {
enable,
disable
} = require('internal/inspector_async_hook');
internalBinding('inspector').registerAsyncHook(enable, disable);
}
}
// In general deprecations are initialized wherever the APIs are implemented,
// this is used to deprecate APIs implemented in C++ where the deprecation
// utilities are not easily accessible.
function initializeDeprecations() {
const { deprecate } = require('internal/util');
const pendingDeprecation = getOptionValue('--pending-deprecation');
// DEP0103: access to `process.binding('util').isX` type checkers
// TODO(addaleax): Turn into a full runtime deprecation.
const utilBinding = internalBinding('util');
const types = require('internal/util/types');
for (const name of [
'isArrayBuffer',
'isArrayBufferView',
'isAsyncFunction',
'isDataView',
'isDate',
'isExternal',
'isMap',
'isMapIterator',
'isNativeError',
'isPromise',
'isRegExp',
'isSet',
'isSetIterator',
'isTypedArray',
'isUint8Array',
'isAnyArrayBuffer',
]) {
utilBinding[name] = pendingDeprecation ?
deprecate(types[name],
'Accessing native typechecking bindings of Node ' +
'directly is deprecated. ' +
`Please use \`util.types.${name}\` instead.`,
'DEP0103') :
types[name];
}
// TODO(joyeecheung): this is a legacy property exposed to process.
// Now that we use the config binding to carry this information, remove
// it from the process. We may consider exposing it properly in
// process.features.
const { noBrowserGlobals } = internalBinding('config');
if (noBrowserGlobals) {
ObjectDefineProperty(process, '_noBrowserGlobals', {
writable: false,
enumerable: true,
configurable: true,
value: noBrowserGlobals
});
}
if (pendingDeprecation) {
process.binding = deprecate(process.binding,
'process.binding() is deprecated. ' +
'Please use public APIs instead.', 'DEP0111');
process._tickCallback = deprecate(process._tickCallback,
'process._tickCallback() is deprecated',
'DEP0134');
}
// Create global.process and 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 _process = process;
ObjectDefineProperty(globalThis, 'process', {
get() {
return _process;
},
set(value) {
_process = value;
},
enumerable: false,
configurable: true
});
let _Buffer = Buffer;
ObjectDefineProperty(globalThis, 'Buffer', {
get() {
return _Buffer;
},
set(value) {
_Buffer = value;
},
enumerable: false,
configurable: true
});
}
function setupChildProcessIpcChannel() {
if (process.env.NODE_CHANNEL_FD) {
const assert = require('internal/assert');
const fd = NumberParseInt(process.env.NODE_CHANNEL_FD, 10);
assert(fd >= 0);
// Make sure it's not accidentally inherited by child processes.
delete process.env.NODE_CHANNEL_FD;
const serializationMode =
process.env.NODE_CHANNEL_SERIALIZATION_MODE || 'json';
delete process.env.NODE_CHANNEL_SERIALIZATION_MODE;
require('child_process')._forkChild(fd, serializationMode);
assert(process.send);
}
}
function initializeClusterIPC() {
if (process.argv[1] && process.env.NODE_UNIQUE_ID) {
const cluster = require('cluster');
cluster._setupWorker();
// Make sure it's not accidentally inherited by child processes.
delete process.env.NODE_UNIQUE_ID;
}
}
function initializePolicy() {
const experimentalPolicy = getOptionValue('--experimental-policy');
if (experimentalPolicy) {
process.emitWarning('Policies are experimental.',
'ExperimentalWarning');
const { pathToFileURL, URL } = require('internal/url');
// URL here as it is slightly different parsing
// no bare specifiers for now
let manifestURL;
if (require('path').isAbsolute(experimentalPolicy)) {
manifestURL = new URL(`file://${experimentalPolicy}`);
} else {
const cwdURL = pathToFileURL(process.cwd());
cwdURL.pathname += '/';
manifestURL = new URL(experimentalPolicy, cwdURL);
}
const fs = require('fs');
const src = fs.readFileSync(manifestURL, 'utf8');
const experimentalPolicyIntegrity = getOptionValue('--policy-integrity');
if (experimentalPolicyIntegrity) {
const SRI = require('internal/policy/sri');
const { createHash, timingSafeEqual } = require('crypto');
const realIntegrities = new SafeMap();
const integrityEntries = SRI.parse(experimentalPolicyIntegrity);
let foundMatch = false;
for (let i = 0; i < integrityEntries.length; i++) {
const {
algorithm,
value: expected
} = integrityEntries[i];
const hash = createHash(algorithm);
hash.update(src);
const digest = hash.digest();
if (digest.length === expected.length &&
timingSafeEqual(digest, expected)) {
foundMatch = true;
break;
}
realIntegrities.set(algorithm, digest.toString('base64'));
}
if (!foundMatch) {
throw new ERR_MANIFEST_ASSERT_INTEGRITY(manifestURL, realIntegrities);
}
}
require('internal/process/policy')
.setup(src, manifestURL.href);
}
}
function initializeWASI() {
const { NativeModule } = require('internal/bootstrap/loaders');
const mod = NativeModule.map.get('wasi');
mod.canBeRequiredByUsers =
getOptionValue('--experimental-wasi-unstable-preview1');
}
function initializeCJSLoader() {
const CJSLoader = require('internal/modules/cjs/loader');
if (!getEmbedderOptions().noGlobalSearchPaths) {
CJSLoader.Module._initPaths();
}
// TODO(joyeecheung): deprecate this in favor of a proper hook?
CJSLoader.Module.runMain =
require('internal/modules/run_main').executeUserEntryPoint;
}
function initializeESMLoader() {
// Create this WeakMap in js-land because V8 has no C++ API for WeakMap.
internalBinding('module_wrap').callbackMap = new SafeWeakMap();
if (getEmbedderOptions().shouldNotRegisterESMLoader) return;
const {
setImportModuleDynamicallyCallback,
setInitializeImportMetaObjectCallback
} = internalBinding('module_wrap');
const esm = require('internal/process/esm_loader');
// Setup per-isolate callbacks that locate data or callbacks that we keep
// track of for different ESM modules.
setInitializeImportMetaObjectCallback(esm.initializeImportMetaObject);
setImportModuleDynamicallyCallback(esm.importModuleDynamicallyCallback);
// Patch the vm module when --experimental-vm-modules is on.
// Please update the comments in vm.js when this block changes.
if (getOptionValue('--experimental-vm-modules')) {
const {
Module, SourceTextModule, SyntheticModule,
} = require('internal/vm/module');
const vm = require('vm');
vm.Module = Module;
vm.SourceTextModule = SourceTextModule;
vm.SyntheticModule = SyntheticModule;
}
}
function initializeSourceMapsHandlers() {
const { setSourceMapsEnabled } =
require('internal/source_map/source_map_cache');
process.setSourceMapsEnabled = setSourceMapsEnabled;
}
function initializeFrozenIntrinsics() {
if (getOptionValue('--frozen-intrinsics')) {
process.emitWarning('The --frozen-intrinsics flag is experimental',
'ExperimentalWarning');
require('internal/freeze_intrinsics')();
}
}
function loadPreloadModules() {
// For user code, we preload modules if `-r` is passed
const preloadModules = getOptionValue('--require');
if (preloadModules && preloadModules.length > 0) {
const {
Module: {
_preloadModules
},
} = require('internal/modules/cjs/loader');
_preloadModules(preloadModules);
}
}
module.exports = {
patchProcessObject,
setupCoverageHooks,
setupWarningHandler,
setupFetch,
setupWebCrypto,
setupDebugEnv,
setupPerfHooks,
prepareMainThreadExecution,
initializeDeprecations,
initializeESMLoader,
initializeFrozenIntrinsics,
initializeSourceMapsHandlers,
loadPreloadModules,
setupTraceCategoryState,
setupInspectorHooks,
initializeReport,
initializeCJSLoader,
initializeWASI
};
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