1// Copyright 2013 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28function s(v) { 29 v.x = 1; 30} 31 32function c(p) { 33 return {__proto__: p}; 34} 35 36var p = {}; 37 38// Make p the last prototype in the chain. 39p.__proto__ = null; 40 41var o1 = c(p); 42var o2 = c(p); 43var o3 = c(p); 44var o4 = c(p); 45 46// Make y go to slow mode. 47// Do this after using p as prototype, since using an object as prototype kicks 48// it back into fast mode. 49p.y = 1; 50delete p.y; 51 52// Initialize the store IC. 53s(o1); 54s(o2); 55 56// Do something with x in slow-mode p. 57Object.defineProperty(p, "x", { writable: false, value: 5 }); 58 59// Verify that directly setting x fails. 60o3.x = 10; 61assertEquals(5, o3.x); 62 63// Verify that setting x through the IC fails. 64s(o4); 65assertEquals(5, o4.x); 66