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