checkin other ncc generated files

dist/fixasync.js

@@ -0,0 +1,83 @@
+'use strict';
+
+// eslint-disable-next-line no-invalid-this, no-shadow
+const {GeneratorFunction, AsyncFunction, AsyncGeneratorFunction, global, internal, host, hook} = this;
+const {Contextify, Decontextify} = internal;
+// eslint-disable-next-line no-shadow
+const {Function, eval: eval_, Promise, Object, Reflect} = global;
+const {getOwnPropertyDescriptor, defineProperty, assign} = Object;
+const {apply: rApply, construct: rConstruct} = Reflect;
+
+const FunctionHandler = {
+	__proto__: null,
+	apply(target, thiz, args) {
+		const type = this.type;
+		args = Decontextify.arguments(args);
+		try {
+			args = Contextify.value(hook(type, args));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+		return rApply(target, thiz, args);
+	},
+	construct(target, args, newTarget) {
+		const type = this.type;
+		args = Decontextify.arguments(args);
+		try {
+			args = Contextify.value(hook(type, args));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+		return rConstruct(target, args, newTarget);
+	}
+};
+
+function makeCheckFunction(type) {
+	return assign({
+		__proto__: null,
+		type
+	}, FunctionHandler);
+}
+
+function override(obj, prop, value) {
+	const desc = getOwnPropertyDescriptor(obj, prop);
+	desc.value = value;
+	defineProperty(obj, prop, desc);
+}
+
+const proxiedFunction = new host.Proxy(Function, makeCheckFunction('function'));
+override(Function.prototype, 'constructor', proxiedFunction);
+if (GeneratorFunction) {
+	Object.setPrototypeOf(GeneratorFunction, proxiedFunction);
+	override(GeneratorFunction.prototype, 'constructor', new host.Proxy(GeneratorFunction, makeCheckFunction('generator_function')));
+}
+if (AsyncFunction) {
+	Object.setPrototypeOf(AsyncFunction, proxiedFunction);
+	override(AsyncFunction.prototype, 'constructor', new host.Proxy(AsyncFunction, makeCheckFunction('async_function')));
+}
+if (AsyncGeneratorFunction) {
+	Object.setPrototypeOf(AsyncGeneratorFunction, proxiedFunction);
+	override(AsyncGeneratorFunction.prototype, 'constructor', new host.Proxy(AsyncGeneratorFunction, makeCheckFunction('async_generator_function')));
+}
+
+global.Function = proxiedFunction;
+global.eval = new host.Proxy(eval_, makeCheckFunction('eval'));
+
+if (Promise) {
+
+	Promise.prototype.then = new host.Proxy(Promise.prototype.then, makeCheckFunction('promise_then'));
+	// This seems not to work, and will produce
+	// UnhandledPromiseRejectionWarning: TypeError: Method Promise.prototype.then called on incompatible receiver [object Object].
+	// This is likely caused since the host.Promise.prototype.then cannot use the VM Proxy object.
+	// Contextify.connect(host.Promise.prototype.then, Promise.prototype.then);
+
+	if (Promise.prototype.finally) {
+		Promise.prototype.finally = new host.Proxy(Promise.prototype.finally, makeCheckFunction('promise_finally'));
+		// Contextify.connect(host.Promise.prototype.finally, Promise.prototype.finally);
+	}
+	if (Promise.prototype.catch) {
+		Promise.prototype.catch = new host.Proxy(Promise.prototype.catch, makeCheckFunction('promise_catch'));
+		// Contextify.connect(host.Promise.prototype.catch, Promise.prototype.catch);
+	}
+
+}

dist/sandbox.js

@@ -0,0 +1,682 @@
+/* eslint-disable no-shadow, no-invalid-this */
+/* global vm, host, Contextify, Decontextify, VMError, options */
+
+'use strict';
+
+const {Script} = host.require('vm');
+const fs = host.require('fs');
+const pa = host.require('path');
+
+const BUILTIN_MODULES = host.process.binding('natives');
+const parseJSON = JSON.parse;
+const importModuleDynamically = () => {
+	// We can't throw an error object here because since vm.Script doesn't store a context, we can't properly contextify that error object.
+	// eslint-disable-next-line no-throw-literal
+	throw 'Dynamic imports are not allowed.';
+};
+
+/**
+ * @param {Object} host Hosts's internal objects.
+ */
+
+return ((vm, host) => {
+	'use strict';
+
+	const global = this;
+
+	const TIMERS = new host.WeakMap(); // Contains map of timers created inside sandbox
+	const BUILTINS = {__proto__: null};
+	const CACHE = {__proto__: null};
+	const EXTENSIONS = {
+		__proto__: null,
+		['.json'](module, filename) {
+			try {
+				const code = fs.readFileSync(filename, 'utf8');
+				module.exports = parseJSON(code);
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		},
+		['.node'](module, filename) {
+			if (vm.options.require.context === 'sandbox') throw new VMError('Native modules can be required only with context set to \'host\'.');
+
+			try {
+				module.exports = Contextify.readonly(host.require(filename));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		}
+	};
+
+	for (let i = 0; i < vm.options.sourceExtensions.length; i++) {
+		const ext = vm.options.sourceExtensions[i];
+
+		EXTENSIONS['.' + ext] = (module, filename, dirname) => {
+			if (vm.options.require.context !== 'sandbox') {
+				try {
+					module.exports = Contextify.readonly(host.require(filename));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			} else {
+				let script;
+
+				try {
+					// Load module
+					let contents = fs.readFileSync(filename, 'utf8');
+					contents = vm._compiler(contents, filename);
+
+					const code = host.STRICT_MODULE_PREFIX + contents + host.MODULE_SUFFIX;
+
+					const ccode = vm._hook('run', [code]);
+
+					// Precompile script
+					script = new Script(ccode, {
+						__proto__: null,
+						filename: filename || 'vm.js',
+						displayErrors: false,
+						importModuleDynamically
+					});
+
+				} catch (ex) {
+					throw Contextify.value(ex);
+				}
+
+				const closure = script.runInContext(global, {
+					__proto__: null,
+					filename: filename || 'vm.js',
+					displayErrors: false,
+					importModuleDynamically
+				});
+
+				// run the script
+				closure(module.exports, module.require, module, filename, dirname);
+			}
+		};
+	}
+
+	const _parseExternalOptions = (options) => {
+		if (host.Array.isArray(options)) {
+			return {
+				__proto__: null,
+				external: options,
+				transitive: false
+			};
+		}
+
+		return {
+			__proto__: null,
+			external: options.modules,
+			transitive: options.transitive
+		};
+	};
+
+	/**
+	 * Resolve filename.
+	 */
+
+	const _resolveFilename = (path) => {
+		if (!path) return null;
+		let hasPackageJson;
+		try {
+			path = pa.resolve(path);
+
+			const exists = fs.existsSync(path);
+			const isdir = exists ? fs.statSync(path).isDirectory() : false;
+
+			// direct file match
+			if (exists && !isdir) return path;
+
+			// load as file
+
+			for (let i = 0; i < vm.options.sourceExtensions.length; i++) {
+				const ext = vm.options.sourceExtensions[i];
+				if (fs.existsSync(`${path}.${ext}`)) return `${path}.${ext}`;
+			}
+			if (fs.existsSync(`${path}.json`)) return `${path}.json`;
+			if (fs.existsSync(`${path}.node`)) return `${path}.node`;
+
+			// load as module
+
+			hasPackageJson = fs.existsSync(`${path}/package.json`);
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+
+		if (hasPackageJson) {
+			let pkg;
+			try {
+				pkg = fs.readFileSync(`${path}/package.json`, 'utf8');
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+			try {
+				pkg = parseJSON(pkg);
+			} catch (ex) {
+				throw new VMError(`Module '${path}' has invalid package.json`, 'EMODULEINVALID');
+			}
+
+			let main;
+			if (pkg && pkg.main) {
+				main = _resolveFilename(`${path}/${pkg.main}`);
+				if (!main) main = _resolveFilename(`${path}/index`);
+			} else {
+				main = _resolveFilename(`${path}/index`);
+			}
+
+			return main;
+		}
+
+		// load as directory
+
+		try {
+			for (let i = 0; i < vm.options.sourceExtensions.length; i++) {
+				const ext = vm.options.sourceExtensions[i];
+				if (fs.existsSync(`${path}/index.${ext}`)) return `${path}/index.${ext}`;
+			}
+
+			if (fs.existsSync(`${path}/index.json`)) return `${path}/index.json`;
+			if (fs.existsSync(`${path}/index.node`)) return `${path}/index.node`;
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+
+		return null;
+	};
+
+	/**
+	 * Builtin require.
+	 */
+
+	const _requireBuiltin = (moduleName) => {
+		if (moduleName === 'buffer') return ({Buffer});
+		if (BUILTINS[moduleName]) return BUILTINS[moduleName].exports; // Only compiled builtins are stored here
+
+		if (moduleName === 'util') {
+			return Contextify.readonly(host.require(moduleName), {
+				// Allows VM context to use util.inherits
+				__proto__: null,
+				inherits: (ctor, superCtor) => {
+					ctor.super_ = superCtor;
+					Object.setPrototypeOf(ctor.prototype, superCtor.prototype);
+				}
+			});
+		}
+
+		if (moduleName === 'events' || moduleName === 'internal/errors') {
+			let script;
+			try {
+				script = new Script(`(function (exports, require, module, process, internalBinding) {
+						'use strict';
+						const primordials = global;
+						${BUILTIN_MODULES[moduleName]}
+						\n
+					});`, {
+					filename: `${moduleName}.vm.js`
+				});
+
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			// setup module scope
+			const module = BUILTINS[moduleName] = {
+				exports: {},
+				require: _requireBuiltin
+			};
+
+			// run script
+			try {
+				// FIXME binding should be contextified
+				script.runInContext(global)(module.exports, module.require, module, host.process, host.process.binding);
+			} catch (e) {
+				// e could be from inside or outside of sandbox
+				throw new VMError(`Error loading '${moduleName}'`);
+			}
+			return module.exports;
+		}
+
+		return Contextify.readonly(host.require(moduleName));
+	};
+
+	/**
+	 * Prepare require.
+	 */
+
+	const _prepareRequire = (currentDirname, parentAllowsTransitive = false) => {
+		const _require = moduleName => {
+			let requireObj;
+			try {
+				const optionsObj = vm.options;
+				if (optionsObj.nesting && moduleName === 'vm2') return {VM: Contextify.readonly(host.VM), NodeVM: Contextify.readonly(host.NodeVM)};
+				requireObj = optionsObj.require;
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			if (!requireObj) throw new VMError(`Access denied to require '${moduleName}'`, 'EDENIED');
+			if (moduleName == null) throw new VMError("Module '' not found.", 'ENOTFOUND');
+			if (typeof moduleName !== 'string') throw new VMError(`Invalid module name '${moduleName}'`, 'EINVALIDNAME');
+
+			let filename;
+			let allowRequireTransitive = false;
+
+			// Mock?
+
+			try {
+				const {mock} = requireObj;
+				if (mock) {
+					const mockModule = mock[moduleName];
+					if (mockModule) {
+						return Contextify.readonly(mockModule);
+					}
+				}
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			// Builtin?
+
+			if (BUILTIN_MODULES[moduleName]) {
+				let allowed;
+				try {
+					const builtinObj = requireObj.builtin;
+					if (host.Array.isArray(builtinObj)) {
+						if (builtinObj.indexOf('*') >= 0) {
+							allowed = builtinObj.indexOf(`-${moduleName}`) === -1;
+						} else {
+							allowed = builtinObj.indexOf(moduleName) >= 0;
+						}
+					} else if (builtinObj) {
+						allowed = builtinObj[moduleName];
+					} else {
+						allowed = false;
+					}
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+				if (!allowed) throw new VMError(`Access denied to require '${moduleName}'`, 'EDENIED');
+
+				return _requireBuiltin(moduleName);
+			}
+
+			// External?
+
+			let externalObj;
+			try {
+				externalObj = requireObj.external;
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			if (!externalObj) throw new VMError(`Access denied to require '${moduleName}'`, 'EDENIED');
+
+			if (/^(\.|\.\/|\.\.\/)/.exec(moduleName)) {
+				// Module is relative file, e.g. ./script.js or ../script.js
+
+				if (!currentDirname) throw new VMError('You must specify script path to load relative modules.', 'ENOPATH');
+
+				filename = _resolveFilename(`${currentDirname}/${moduleName}`);
+			} else if (/^(\/|\\|[a-zA-Z]:\\)/.exec(moduleName)) {
+				// Module is absolute file, e.g. /script.js or //server/script.js or C:\script.js
+
+				filename = _resolveFilename(moduleName);
+			} else {
+				// Check node_modules in path
+
+				if (!currentDirname) throw new VMError('You must specify script path to load relative modules.', 'ENOPATH');
+
+				if (typeof externalObj === 'object') {
+					let isWhitelisted;
+					try {
+						const { external, transitive } = _parseExternalOptions(externalObj);
+
+						isWhitelisted = external.some(ext => host.helpers.match(ext, moduleName)) || (transitive && parentAllowsTransitive);
+					} catch (e) {
+						throw Contextify.value(e);
+					}
+					if (!isWhitelisted) {
+						throw new VMError(`The module '${moduleName}' is not whitelisted in VM.`, 'EDENIED');
+					}
+
+					allowRequireTransitive = true;
+				}
+
+				// FIXME the paths array has side effects
+				const paths = currentDirname.split(pa.sep);
+
+				while (paths.length) {
+					const path = paths.join(pa.sep);
+
+					// console.log moduleName, "#{path}#{pa.sep}node_modules#{pa.sep}#{moduleName}"
+
+					filename = _resolveFilename(`${path}${pa.sep}node_modules${pa.sep}${moduleName}`);
+					if (filename) break;
+
+					paths.pop();
+				}
+			}
+
+			if (!filename) {
+				let resolveFunc;
+				try {
+					resolveFunc = requireObj.resolve;
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+				if (resolveFunc) {
+					let resolved;
+					try {
+						resolved = requireObj.resolve(moduleName, currentDirname);
+					} catch (e) {
+						throw Contextify.value(e);
+					}
+					filename = _resolveFilename(resolved);
+				}
+			}
+			if (!filename) throw new VMError(`Cannot find module '${moduleName}'`, 'ENOTFOUND');
+
+			// return cache whenever possible
+			if (CACHE[filename]) return CACHE[filename].exports;
+
+			const dirname = pa.dirname(filename);
+			const extname = pa.extname(filename);
+
+			let allowedModule = true;
+			try {
+				const rootObj = requireObj.root;
+				if (rootObj) {
+					const rootPaths = host.Array.isArray(rootObj) ? rootObj : host.Array.of(rootObj);
+					allowedModule = rootPaths.some(path => host.String.prototype.startsWith.call(dirname, pa.resolve(path)));
+				}
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			if (!allowedModule) {
+				throw new VMError(`Module '${moduleName}' is not allowed to be required. The path is outside the border!`, 'EDENIED');
+			}
+
+			const module = CACHE[filename] = {
+				filename,
+				exports: {},
+				require: _prepareRequire(dirname, allowRequireTransitive)
+			};
+
+			// lookup extensions
+			if (EXTENSIONS[extname]) {
+				EXTENSIONS[extname](module, filename, dirname);
+				return module.exports;
+			}
+
+			throw new VMError(`Failed to load '${moduleName}': Unknown type.`, 'ELOADFAIL');
+		};
+
+		return _require;
+	};
+
+	/**
+	 * Prepare sandbox.
+	 */
+
+	// This is a function and not an arrow function, since the original is also a function
+	global.setTimeout = function setTimeout(callback, delay, ...args) {
+		if (typeof callback !== 'function') throw new TypeError('"callback" argument must be a function');
+		let tmr;
+		try {
+			tmr = host.setTimeout(Decontextify.value(() => {
+				// FIXME ...args has side effects
+				callback(...args);
+			}), Decontextify.value(delay));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+		const local = Contextify.value(tmr);
+
+		TIMERS.set(local, tmr);
+		return local;
+	};
+
+	global.setInterval = function setInterval(callback, interval, ...args) {
+		if (typeof callback !== 'function') throw new TypeError('"callback" argument must be a function');
+		let tmr;
+		try {
+			tmr = host.setInterval(Decontextify.value(() => {
+				// FIXME ...args has side effects
+				callback(...args);
+			}), Decontextify.value(interval));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+
+		const local = Contextify.value(tmr);
+
+		TIMERS.set(local, tmr);
+		return local;
+	};
+
+	global.setImmediate = function setImmediate(callback, ...args) {
+		if (typeof callback !== 'function') throw new TypeError('"callback" argument must be a function');
+		let tmr;
+		try {
+			tmr = host.setImmediate(Decontextify.value(() => {
+				// FIXME ...args has side effects
+				callback(...args);
+			}));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+
+		const local = Contextify.value(tmr);
+
+		TIMERS.set(local, tmr);
+		return local;
+	};
+
+	global.clearTimeout = function clearTimeout(local) {
+		try {
+			host.clearTimeout(TIMERS.get(local));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+	};
+
+	global.clearInterval = function clearInterval(local) {
+		try {
+			host.clearInterval(TIMERS.get(local));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+	};
+
+	global.clearImmediate = function clearImmediate(local) {
+		try {
+			host.clearImmediate(TIMERS.get(local));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+	};
+
+	function addListener(name, handler) {
+		if (name !== 'beforeExit' && name !== 'exit') {
+			throw new Error(`Access denied to listen for '${name}' event.`);
+		}
+
+		try {
+			host.process.on(name, Decontextify.value(handler));
+		} catch (e) {
+			throw Contextify.value(e);
+		}
+
+		return this;
+	}
+
+	const {argv: optionArgv, env: optionsEnv} = options;
+
+	// FIXME wrong class structure
+	global.process = {
+		argv: optionArgv !== undefined ? Contextify.value(optionArgv) : [],
+		title: host.process.title,
+		version: host.process.version,
+		versions: Contextify.readonly(host.process.versions),
+		arch: host.process.arch,
+		platform: host.process.platform,
+		env: optionsEnv !== undefined ? Contextify.value(optionsEnv) : {},
+		pid: host.process.pid,
+		features: Contextify.readonly(host.process.features),
+		nextTick: function nextTick(callback, ...args) {
+			if (typeof callback !== 'function') {
+				throw new Error('Callback must be a function.');
+			}
+
+			try {
+				host.process.nextTick(Decontextify.value(() => {
+					// FIXME ...args has side effects
+					callback(...args);
+				}));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		},
+		hrtime: function hrtime(time) {
+			try {
+				return Contextify.value(host.process.hrtime(Decontextify.value(time)));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		},
+		cwd: function cwd() {
+			try {
+				return Contextify.value(host.process.cwd());
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		},
+		addListener,
+		on: addListener,
+
+		once: function once(name, handler) {
+			if (name !== 'beforeExit' && name !== 'exit') {
+				throw new Error(`Access denied to listen for '${name}' event.`);
+			}
+
+			try {
+				host.process.once(name, Decontextify.value(handler));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			return this;
+		},
+
+		listeners: function listeners(name) {
+			if (name !== 'beforeExit' && name !== 'exit') {
+				// Maybe add ({__proto__:null})[name] to throw when name fails in https://tc39.es/ecma262/#sec-topropertykey.
+				return [];
+			}
+
+			// Filter out listeners, which were not created in this sandbox
+			try {
+				return Contextify.value(host.process.listeners(name).filter(listener => Contextify.isVMProxy(listener)));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		},
+
+		removeListener: function removeListener(name, handler) {
+			if (name !== 'beforeExit' && name !== 'exit') {
+				return this;
+			}
+
+			try {
+				host.process.removeListener(name, Decontextify.value(handler));
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+
+			return this;
+		},
+
+		umask: function umask() {
+			if (arguments.length) {
+				throw new Error('Access denied to set umask.');
+			}
+
+			try {
+				return Contextify.value(host.process.umask());
+			} catch (e) {
+				throw Contextify.value(e);
+			}
+		}
+	};
+
+	if (vm.options.console === 'inherit') {
+		global.console = Contextify.readonly(host.console);
+	} else if (vm.options.console === 'redirect') {
+		global.console = {
+			debug(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.debug', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			log(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.log', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			info(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.info', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			warn(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.warn', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			error(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.error', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			dir(...args) {
+				try {
+					vm.emit('console.dir', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			},
+			time() {},
+			timeEnd() {},
+			trace(...args) {
+				try {
+					// FIXME ...args has side effects
+					vm.emit('console.trace', ...Decontextify.arguments(args));
+				} catch (e) {
+					throw Contextify.value(e);
+				}
+			}
+		};
+	}
+
+	/*
+	Return contextified require.
+	*/
+
+	return _prepareRequire;
+})(vm, host);