nodejs/test/parallel/test-worker-terminate-source-map.js
Anna Henningsen f17e414dc4
process: make source map getter resistant against prototype tampering
Since this code runs during process and Worker shutdown, it should not
call user-provided code and thereby e.g. provide a way to break out of
`worker.terminate()`.

PR-URL: https://github.com/nodejs/node/pull/30228
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ben Coe <bencoe@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2019-11-05 20:55:54 +01:00

41 lines
1.2 KiB
JavaScript

'use strict';
const common = require('../common');
const tmpdir = require('../common/tmpdir');
const assert = require('assert');
// Attempts to test that the source map JS code run on process shutdown
// does not call any user-defined JS code.
const { Worker, workerData, parentPort } = require('worker_threads');
if (!workerData) {
tmpdir.refresh();
process.env.NODE_V8_COVERAGE = tmpdir.path;
// Count the number of some calls that should not be made.
const callCount = new Int32Array(new SharedArrayBuffer(4));
const w = new Worker(__filename, { workerData: { callCount } });
w.on('message', common.mustCall(() => w.terminate()));
w.on('exit', common.mustCall(() => {
assert.strictEqual(callCount[0], 0);
}));
return;
}
const { callCount } = workerData;
function increaseCallCount() { callCount[0]++; }
// Increase the call count when a forbidden method is called.
Object.getPrototypeOf((new Map()).entries()).next = increaseCallCount;
Map.prototype.entries = increaseCallCount;
Object.keys = increaseCallCount;
Object.create = increaseCallCount;
Object.hasOwnProperty = increaseCallCount;
Object.defineProperty(Object.prototype, 'value', {
get: increaseCallCount,
set: increaseCallCount
});
parentPort.postMessage('done');