Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // 1. Redistributions of source code must retain the above copyright |
| 8 | // notice, this list of conditions and the following disclaimer. |
| 9 | // 2. Redistributions in binary form must reproduce the above copyright |
| 10 | // notice, this list of conditions and the following disclaimer in the |
| 11 | // documentation and/or other materials provided with the distribution. |
| 12 | // |
| 13 | // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| 14 | // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 15 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 16 | // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 17 | // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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| 23 | |
| 24 | description("This test makes sure we don't hang when setting cyclic prototype values: http://bugs.webkit.org/show_bug.cgi?id=6985") |
| 25 | |
| 26 | var o1 = { p1: 1 }; |
| 27 | var o2 = { p2: 2 }; |
| 28 | o2.__proto__ = o1; |
| 29 | var o3 = { p3: 3 }; |
| 30 | o3.__proto__ = o2; |
| 31 | |
| 32 | // Try to create a cyclical prototype chain. |
| 33 | shouldThrow("o1.__proto__ = o3;"); |
| 34 | |
| 35 | // This changes behaviour, since __proto__ is an accessor on Object.prototype. |
| 36 | o1.__proto__ = null; |
| 37 | |
| 38 | shouldBeFalse("({}).hasOwnProperty.call(o1, '__proto__')"); |
| 39 | o1.__proto__ = o3; |
| 40 | shouldBeTrue("({}).hasOwnProperty.call(o1, '__proto__')"); |
| 41 | shouldBe("Object.getPrototypeOf(o1)", "null"); |