1// Copyright 2011 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// Flags: --allow-natives-syntax 29 30// Check that message and name are not enumerable on Error objects. 31var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name'); 32assertFalse(desc['enumerable']); 33desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message'); 34assertFalse(desc['enumerable']); 35 36var e = new Error("foobar"); 37desc = Object.getOwnPropertyDescriptor(e, 'message'); 38assertFalse(desc['enumerable']); 39desc = Object.getOwnPropertyDescriptor(e, 'stack'); 40assertFalse(desc['enumerable']); 41 42var e = new Error(); 43assertFalse(e.hasOwnProperty('message')); 44 45// name is not tested above, but in addition we should have no enumerable 46// properties, so we simply assert that. 47for (var v in e) { 48 assertUnreachable(); 49} 50 51// Check that error construction does not call setters for the 52// properties on error objects in prototypes. 53function fail() { assertUnreachable(); }; 54ReferenceError.prototype.__defineSetter__('name', fail); 55ReferenceError.prototype.__defineSetter__('message', fail); 56ReferenceError.prototype.__defineSetter__('stack', fail); 57 58var e = new ReferenceError(); 59assertTrue(e.hasOwnProperty('stack')); 60 61var e = new ReferenceError('123'); 62assertTrue(e.hasOwnProperty('message')); 63assertTrue(e.hasOwnProperty('stack')); 64 65var e = %MakeReferenceError("my_test_error", [0, 1]); 66assertTrue(e.hasOwnProperty('stack')); 67 68// Check that intercepting property access from toString is prevented for 69// compiler errors. This is not specified, but allowing interception 70// through a getter can leak error objects from different 71// script tags in the same context in a browser setting. 72var errors = [SyntaxError, ReferenceError, TypeError]; 73for (var i in errors) { 74 var name = errors[i].prototype.toString(); 75 // Monkey-patch prototype. 76 var props = ["name", "message", "stack"]; 77 for (var j in props) { 78 errors[i].prototype.__defineGetter__(props[j], fail); 79 } 80 // String conversion should not invoke monkey-patched getters on prototype. 81 var e = new errors[i]; 82 assertEquals(name, e.toString()); 83 // Custom getters in actual objects are welcome. 84 e.__defineGetter__("name", function() { return "mine"; }); 85 assertEquals("mine", e.toString()); 86} 87 88// Monkey-patching non-static errors should still be observable. 89function MyError() {} 90MyError.prototype = new Error; 91var errors = [Error, RangeError, EvalError, URIError, MyError]; 92for (var i in errors) { 93 errors[i].prototype.__defineGetter__("name", function() { return "my"; }); 94 errors[i].prototype.__defineGetter__("message", function() { return "moo"; }); 95 var e = new errors[i]; 96 assertEquals("my: moo", e.toString()); 97} 98 99 100Error.prototype.toString = Object.prototype.toString; 101assertEquals("[object Error]", Error.prototype.toString()); 102assertEquals(Object.prototype, Error.prototype.__proto__); 103var e = new Error("foo"); 104assertEquals("[object Error]", e.toString()); 105