test-vm-memleak.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
// Flags: --max_old_space_size=32

require('../common');
const assert = require('assert');
const vm = require('vm');

const start = Date.now();

const interval = setInterval(function() {
  try {
    vm.runInNewContext('throw 1;');
  } catch {
  }

  const rss = process.memoryUsage().rss;
  assert.ok(rss < 64 * 1024 * 1024,
            `memory usage: ${rss} (${Math.round(rss / (1024 * 1024))} MB)`);

  // Stop after 5 seconds.
  if (Date.now() - start > 5 * 1000) {
    clearInterval(interval);

    testContextLeak();
  }
}, 1);

function testContextLeak() {
  // TODO: This needs a comment explaining what it's doing. Will it crash the
  // test if there is a memory leak? Or what?
  for (let i = 0; i < 1000; i++)
    vm.createContext({});
}