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