declare module 'vm' {
    interface Context extends NodeJS.Dict<any> { }
    interface BaseOptions {
        /**
         * Specifies the filename used in stack traces produced by this script.
         * Default: `''`.
         */
        filename?: string;
        /**
         * Specifies the line number offset that is displayed in stack traces produced by this script.
         * Default: `0`.
         */
        lineOffset?: number;
        /**
         * Specifies the column number offset that is displayed in stack traces produced by this script.
         * @default 0
         */
        columnOffset?: number;
    }
    interface ScriptOptions extends BaseOptions {
        displayErrors?: boolean;
        timeout?: number;
        cachedData?: Buffer;
        /** @deprecated in favor of `script.createCachedData()` */
        produceCachedData?: boolean;
    }
    interface RunningScriptOptions extends BaseOptions {
        /**
         * When `true`, if an `Error` occurs while compiling the `code`, the line of code causing the error is attached to the stack trace.
         * Default: `true`.
         */
        displayErrors?: boolean;
        /**
         * Specifies the number of milliseconds to execute code before terminating execution.
         * If execution is terminated, an `Error` will be thrown. This value must be a strictly positive integer.
         */
        timeout?: number;
        /**
         * If `true`, the execution will be terminated when `SIGINT` (Ctrl+C) is received.
         * Existing handlers for the event that have been attached via `process.on('SIGINT')` will be disabled during script execution, but will continue to work after that.
         * If execution is terminated, an `Error` will be thrown.
         * Default: `false`.
         */
        breakOnSigint?: boolean;
        /**
         * If set to `afterEvaluate`, microtasks will be run immediately after the script has run.
         */
        microtaskMode?: 'afterEvaluate';
    }
    interface CompileFunctionOptions extends BaseOptions {
        /**
         * Provides an optional data with V8's code cache data for the supplied source.
         */
        cachedData?: Buffer;
        /**
         * Specifies whether to produce new cache data.
         * Default: `false`,
         */
        produceCachedData?: boolean;
        /**
         * The sandbox/context in which the said function should be compiled in.
         */
        parsingContext?: Context;

        /**
         * An array containing a collection of context extensions (objects wrapping the current scope) to be applied while compiling
         */
        contextExtensions?: Object[];
    }

    interface CreateContextOptions {
        /**
         * Human-readable name of the newly created context.
         * @default 'VM Context i' Where i is an ascending numerical index of the created context.
         */
        name?: string;
        /**
         * Corresponds to the newly created context for display purposes.
         * The origin should be formatted like a `URL`, but with only the scheme, host, and port (if necessary),
         * like the value of the `url.origin` property of a URL object.
         * Most notably, this string should omit the trailing slash, as that denotes a path.
         * @default ''
         */
        origin?: string;
        codeGeneration?: {
            /**
             * If set to false any calls to eval or function constructors (Function, GeneratorFunction, etc)
             * will throw an EvalError.
             * @default true
             */
            strings?: boolean;
            /**
             * If set to false any attempt to compile a WebAssembly module will throw a WebAssembly.CompileError.
             * @default true
             */
            wasm?: boolean;
        };
        /**
         * If set to `afterEvaluate`, microtasks will be run immediately after the script has run.
         */
        microtaskMode?: 'afterEvaluate';
    }

    type MeasureMemoryMode = 'summary' | 'detailed';

    interface MeasureMemoryOptions {
        /**
         * @default 'summary'
         */
        mode?: MeasureMemoryMode;
        context?: Context;
    }

    interface MemoryMeasurement {
        total: {
            jsMemoryEstimate: number;
            jsMemoryRange: [number, number];
        };
    }

    class Script {
        constructor(code: string, options?: ScriptOptions);
        runInContext(contextifiedSandbox: Context, options?: RunningScriptOptions): any;
        runInNewContext(sandbox?: Context, options?: RunningScriptOptions): any;
        runInThisContext(options?: RunningScriptOptions): any;
        createCachedData(): Buffer;
        cachedDataRejected?: boolean;
    }
    function createContext(sandbox?: Context, options?: CreateContextOptions): Context;
    function isContext(sandbox: Context): boolean;
    function runInContext(code: string, contextifiedSandbox: Context, options?: RunningScriptOptions | string): any;
    function runInNewContext(code: string, sandbox?: Context, options?: RunningScriptOptions | string): any;
    function runInThisContext(code: string, options?: RunningScriptOptions | string): any;
    function compileFunction(code: string, params?: ReadonlyArray<string>, options?: CompileFunctionOptions): Function;

    /**
     * Measure the memory known to V8 and used by the current execution context or a specified context.
     *
     * The format of the object that the returned Promise may resolve with is
     * specific to the V8 engine and may change from one version of V8 to the next.
     *
     * The returned result is different from the statistics returned by
     * `v8.getHeapSpaceStatistics()` in that `vm.measureMemory()` measures
     * the memory reachable by V8 from a specific context, while
     * `v8.getHeapSpaceStatistics()` measures the memory used by an instance
     * of V8 engine, which can switch among multiple contexts that reference
     * objects in the heap of one engine.
     *
     * @experimental
     */
    function measureMemory(options?: MeasureMemoryOptions): Promise<MemoryMeasurement>;
}
