JezK
Edit File: store-dictionary.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Test dictionary store ICs. // Function that stores property 'x' on an object. function store(obj) { obj.x = 42; } // Create object and force it to dictionary mode by deleting property. var o = { x: 32, y: 33 }; delete o.y; // Make the store ic in the 'store' function go into dictionary store // case. for (var i = 0; i < 3; i++) { store(o); } assertEquals(42, o.x); // Test that READ_ONLY property attribute is respected. Make 'x' // READ_ONLY. Object.defineProperty(o, 'x', { value: 32, writable: false }); // Attempt to store using the store ic in the 'store' function. store(o); // Check that the store did not change the value. assertEquals(32, o.x); // Check that bail-out code works. // Smi. store(1); // Fast case object. o = new Object(); store(o); assertEquals(42, o.x); // Slow case object without x property. delete o.x; store(o); assertEquals(42, o.x);