136 lines
2.7 KiB
JavaScript
136 lines
2.7 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.default = void 0;
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function _util() {
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const data = require('util');
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_util = function () {
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return data;
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};
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return data;
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}
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function _v() {
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const data = require('v8');
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_v = function () {
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return data;
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};
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return data;
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}
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function _vm() {
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const data = require('vm');
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_vm = function () {
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return data;
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};
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return data;
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}
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function _jestGetType() {
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const data = require('jest-get-type');
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_jestGetType = function () {
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return data;
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};
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return data;
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}
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function _prettyFormat() {
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const data = require('pretty-format');
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_prettyFormat = function () {
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return data;
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};
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return data;
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}
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function _defineProperty(obj, key, value) {
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if (key in obj) {
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Object.defineProperty(obj, key, {
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value: value,
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enumerable: true,
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configurable: true,
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writable: true
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});
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} else {
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obj[key] = value;
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}
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return obj;
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}
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const tick = (0, _util().promisify)(setImmediate);
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class LeakDetector {
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constructor(value) {
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_defineProperty(this, '_isReferenceBeingHeld', void 0);
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if ((0, _jestGetType().isPrimitive)(value)) {
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throw new TypeError(
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[
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'Primitives cannot leak memory.',
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'You passed a ' +
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typeof value +
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': <' +
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(0, _prettyFormat().format)(value) +
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'>'
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].join(' ')
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);
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}
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let weak;
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try {
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// eslint-disable-next-line import/no-extraneous-dependencies
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weak = require('weak-napi');
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} catch (err) {
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if (!err || err.code !== 'MODULE_NOT_FOUND') {
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throw err;
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}
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throw new Error(
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'The leaking detection mechanism requires the "weak-napi" package to be installed and work. ' +
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'Please install it as a dependency on your main project'
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);
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}
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weak(value, () => (this._isReferenceBeingHeld = false));
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this._isReferenceBeingHeld = true; // Ensure value is not leaked by the closure created by the "weak" callback.
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value = null;
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}
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async isLeaking() {
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this._runGarbageCollector(); // wait some ticks to allow GC to run properly, see https://github.com/nodejs/node/issues/34636#issuecomment-669366235
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for (let i = 0; i < 10; i++) {
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await tick();
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}
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return this._isReferenceBeingHeld;
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}
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_runGarbageCollector() {
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const isGarbageCollectorHidden = !global.gc; // GC is usually hidden, so we have to expose it before running.
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(0, _v().setFlagsFromString)('--expose-gc');
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(0, _vm().runInNewContext)('gc')(); // The GC was not initially exposed, so let's hide it again.
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if (isGarbageCollectorHidden) {
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(0, _v().setFlagsFromString)('--no-expose-gc');
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}
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}
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}
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exports.default = LeakDetector;
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