Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | function f(a, b, c, d) { return arguments; } |
| 6 | |
| 7 | // Ensure non-configurable argument elements stay non-configurable. |
| 8 | (function () { |
| 9 | var args = f(1); |
| 10 | Object.defineProperty(args, "0", {value: 10, configurable: false}); |
| 11 | assertFalse(Object.getOwnPropertyDescriptor(args, "0").configurable); |
| 12 | for (var i = 0; i < 10; i++) { |
| 13 | args[i] = 1; |
| 14 | } |
| 15 | assertFalse(Object.getOwnPropertyDescriptor(args, "0").configurable); |
| 16 | })(); |
| 17 | |
| 18 | // Ensure read-only properties on the prototype chain cause TypeError. |
| 19 | |
| 20 | // Newly added. |
| 21 | (function () { |
| 22 | var o = []; |
| 23 | var proto = {}; |
| 24 | var index = 3; |
| 25 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 26 | o.__proto__ = proto; |
| 27 | for (var i = 0; i < index; i++) { |
| 28 | store(o, i, 0); |
| 29 | } |
| 30 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 31 | assertThrows(function() { store(o, index, 0); }); |
| 32 | assertEquals(100, o[index]); |
| 33 | })(); |
| 34 | |
| 35 | // Reconfigured. |
| 36 | (function () { |
| 37 | var o = []; |
| 38 | var proto = {3: 10000}; |
| 39 | var index = 3; |
| 40 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 41 | o.__proto__ = proto; |
| 42 | for (var i = 0; i < index; i++) { |
| 43 | store(o, i, 0); |
| 44 | } |
| 45 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 46 | assertThrows(function() { store(o, index, 0); }); |
| 47 | assertEquals(100, o[index]); |
| 48 | })(); |
| 49 | |
| 50 | // Newly added to arguments object. |
| 51 | (function () { |
| 52 | var o = []; |
| 53 | var proto = f(100); |
| 54 | var index = 3; |
| 55 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 56 | o.__proto__ = proto; |
| 57 | for (var i = 0; i < index; i++) { |
| 58 | store(o, i, 0); |
| 59 | } |
| 60 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 61 | assertThrows(function() { store(o, index, 0); }); |
| 62 | assertEquals(100, o[index]); |
| 63 | })(); |
| 64 | |
| 65 | // Reconfigured on to arguments object. |
| 66 | (function () { |
| 67 | var o = []; |
| 68 | var proto = f(100, 200, 300, 400); |
| 69 | var index = 3; |
| 70 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 71 | o.__proto__ = proto; |
| 72 | for (var i = 0; i < index; i++) { |
| 73 | store(o, i, 0); |
| 74 | } |
| 75 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 76 | assertThrows(function() { store(o, index, 0); }); |
| 77 | assertEquals(100, o[index]); |
| 78 | })(); |
| 79 | |
| 80 | // Extensions prevented object. |
| 81 | (function () { |
| 82 | var o = []; |
| 83 | var proto = [0, 1, 2, 3]; |
| 84 | var index = 3; |
| 85 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 86 | o.__proto__ = proto; |
| 87 | for (var i = 0; i < index; i++) { |
| 88 | store(o, i, 0); |
| 89 | } |
| 90 | Object.preventExtensions(proto); |
| 91 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 92 | assertThrows(function() { store(o, index, 0); }); |
| 93 | assertEquals(100, o[index]); |
| 94 | })(); |
| 95 | |
| 96 | // Extensions prevented arguments object. |
| 97 | (function () { |
| 98 | var o = []; |
| 99 | var proto = f(100, 200, 300, 400); |
| 100 | var index = 3; |
| 101 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 102 | o.__proto__ = proto; |
| 103 | for (var i = 0; i < index; i++) { |
| 104 | store(o, i, 0); |
| 105 | } |
| 106 | Object.preventExtensions(proto); |
| 107 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 108 | assertThrows(function() { store(o, index, 0); }); |
| 109 | assertEquals(100, o[index]); |
| 110 | })(); |
| 111 | |
| 112 | // Array with large index. |
| 113 | (function () { |
| 114 | var o = []; |
| 115 | var proto = []; |
| 116 | var index = 3; |
| 117 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 118 | o.__proto__ = proto; |
| 119 | for (var i = 0; i < index; i++) { |
| 120 | store(o, i, 0); |
| 121 | } |
| 122 | proto[1 << 30] = 1; |
| 123 | Object.defineProperty(proto, index, {value: 100, writable: false}); |
| 124 | assertThrows(function() { store(o, index, 0); }); |
| 125 | assertEquals(100, o[index]); |
| 126 | })(); |
| 127 | |
| 128 | // Frozen object. |
| 129 | (function () { |
| 130 | var o = []; |
| 131 | var proto = [0, 1, 2, 3]; |
| 132 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 133 | o.__proto__ = proto; |
| 134 | for (var i = 0; i < 3; i++) { |
| 135 | store(o, i, 0); |
| 136 | } |
| 137 | Object.freeze(proto); |
| 138 | assertThrows(function() { store(o, 3, 0); }); |
| 139 | assertEquals(3, o[3]); |
| 140 | })(); |
| 141 | |
| 142 | // Frozen arguments object. |
| 143 | (function () { |
| 144 | var o = []; |
| 145 | var proto = f(0, 1, 2, 3); |
| 146 | function store(o, i, v) { "use strict"; o[i] = v; }; |
| 147 | o.__proto__ = proto; |
| 148 | for (var i = 0; i < 3; i++) { |
| 149 | store(o, i, 0); |
| 150 | } |
| 151 | Object.freeze(proto); |
| 152 | assertThrows(function() { store(o, 3, 0); }); |
| 153 | assertEquals(3, o[3]); |
| 154 | })(); |