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test: exit sequence sanity tests

Execute many module loads in worker in a loop
while exiting from the main thread at arbitrary
execution points, and make sure that the workers
quiesce without crashing.

`worker_threads` are not necessarily the subject of
testing, those are used for easy simulation of
multi-thread scenarios.

Refs: #25007
PR-URL: #25083
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
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gireeshpunathil authored and targos committed Dec 17, 2018
1 parent c56ddc7 commit ae19f944f822048827fb7dd327e06b16b4d687bc
Showing with 24 additions and 0 deletions.
  1. +24 −0 test/parallel/test-worker-cleanexit-with-moduleload.js
@@ -0,0 +1,24 @@
'use strict';
require('../common');

// Harden the thread interactions on the exit path.
// Ensure workers are able to bail out safe at
// arbitrary execution points. By using a number of
// internal modules as load candidates, the expectation
// is that those will be at various control flow points
// preferrably in the C++ land.

const { Worker } = require('worker_threads');
for (let i = 0; i < 10; i++) {
new Worker("const modules = ['fs', 'assert', 'async_hooks'," +
"'buffer', 'child_process', 'net', 'http', 'https', 'os'," +
"'path', 'v8', 'vm'];" +
'modules.forEach((module) => {' +
'const m = require(module);' +
'});', { eval: true });
}

// Allow workers to go live.
setTimeout(() => {
process.exit(0);
}, 200);

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