1// Copyright 2009 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
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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
28// Flags: --legacy-const
29
30// Make sure that eval can introduce a local variable called __proto__.
31// See http://code.google.com/p/v8/issues/detail?id=186
32
33var setterCalled = false;
34
35var o = {};
36o.__defineSetter__("x", function() { setterCalled = true; });
37
38function runTest(test) {
39  setterCalled = false;
40  test();
41}
42
43function testLocal() {
44  // Add property called __proto__ to the extension object.
45  eval("var __proto__ = o");
46  // Check that the extension object's prototype did not change.
47  eval("var x = 27");
48  assertFalse(setterCalled, "prototype of extension object changed");
49  assertEquals(o, eval("__proto__"));
50}
51
52function testConstLocal() {
53  // Add const property called __proto__ to the extension object.
54  eval("const __proto__ = o");
55  // Check that the extension object's prototype did not change.
56  eval("var x = 27");
57  assertFalse(setterCalled, "prototype of extension object changed");
58  assertEquals(o, eval("__proto__"));
59}
60
61function testGlobal() {
62  // Assign to the global __proto__ property.
63  eval("__proto__ = o");
64  // Check that the prototype of the global object changed.
65  eval("x = 27");
66  assertTrue(setterCalled, "prototype of global object did not change");
67  setterCalled = false;
68  assertEquals(o, eval("__proto__"));
69}
70
71runTest(testLocal);
72runTest(testConstLocal);
73runTest(testGlobal);
74