| 'use strict'; |
| const common = require('../common'); |
| |
| common.skipIfInspectorDisabled(); |
| |
| const assert = require('assert'); |
| const inspector = require('inspector'); |
| const stream = require('stream'); |
| const { Worker, workerData } = require('worker_threads'); |
| |
| const session = new inspector.Session(); |
| session.connect(); |
| session.post('HeapProfiler.enable'); |
| session.post('HeapProfiler.startTrackingHeapObjects', |
| { trackAllocations: true }); |
| |
| // Perform some silly heap allocations for the next 100 ms. |
| const interval = setInterval(() => { |
| new stream.PassThrough().end('abc').on('data', common.mustCall()); |
| }, 1); |
| |
| setTimeout(() => { |
| clearInterval(interval); |
| |
| // Once the main test is done, we re-run it from inside a Worker thread |
| // and stop early, as that is a good way to make sure the timer handles |
| // internally created by the inspector are cleaned up properly. |
| if (workerData === 'stopEarly') |
| process.exit(); |
| |
| let data = ''; |
| session.on('HeapProfiler.addHeapSnapshotChunk', |
| common.mustCallAtLeast((event) => { |
| data += event.params.chunk; |
| })); |
| |
| // TODO(addaleax): Using `{ reportProgress: true }` crashes the process |
| // because the progress indication event would mean calling into JS while |
| // a heap snapshot is being taken, which is forbidden. |
| // What can we do about that? |
| session.post('HeapProfiler.stopTrackingHeapObjects'); |
| |
| assert(data.includes('PassThrough'), data); |
| |
| new Worker(__filename, { workerData: 'stopEarly' }); |
| }, 100); |