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 28var slow = {}; 29var p = {}; 30 31slow.__proto__ = p; 32slow.x = 10; 33slow.y = 10; 34Object.defineProperty(p, "x", {writable:false, value:5}); 35 36function c(p) { 37 return {__proto__: p}; 38} 39 40function s(v) { 41 return v.x = 1; 42} 43 44function s_strict(v) { 45 "use strict"; 46 v.x = 1; 47} 48 49var o1 = c(slow); 50var o2 = c(slow); 51var o1_strict = c(slow); 52var o2_strict = c(slow); 53var o3 = c(slow); 54var o4 = c(slow); 55 56// Make s slow. 57// Do this after using slow as prototype, since using an object as prototype 58// kicks it back into fast mode. 59delete slow.y; 60 61s(o1); 62s(o2); 63s_strict(o1_strict); 64s_strict(o2_strict); 65 66delete slow.x; 67// Directly setting x should fail. 68o3.x = 20 69assertEquals(5, o3.x); 70 71// Setting x through IC should fail. 72s(o4); 73assertEquals(5, o4.x); 74assertThrows("s_strict(o4);", TypeError); 75