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