test_invalidGrayBits.js

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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// Check that the CC handles invalid gray bits without triggering an

// assertion. This condition arises due to OOM and rare in actual use.

function run_test() {

  // Create some weak map entries that may need to have their gray marking

  // fixed.

  let wm = new WeakMap();

  let key = {};

  wm.set(key, {});

  Cu.getJSTestingFunctions().minorgc();

  // Mark gray bits as invalid.

  Cu.getJSTestingFunctions().setGrayBitsInvalid();

  // Cycle collect.

  Cu.forceCC();