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 // Check that message and name are not enumerable on Error objects. 29 var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name'); 30 assertFalse(desc['enumerable']); 31 desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message'); 32 assertFalse(desc['enumerable']); 33 34 var e = new Error("foobar"); 35 desc = Object.getOwnPropertyDescriptor(e, 'message'); 36 assertFalse(desc['enumerable']); 37 desc = Object.getOwnPropertyDescriptor(e, 'stack'); 38 assertFalse(desc['enumerable']); 39 40 var e = new Error(); 41 assertFalse(e.hasOwnProperty('message')); 42 43 // name is not tested above, but in addition we should have no enumerable 44 // properties, so we simply assert that. 45 for (var v in e) { 46 assertUnreachable(); 47 } 48 49 // Check that error construction does not call setters for the 50 // properties on error objects in prototypes. 51 function fail() { assertUnreachable(); }; 52 ReferenceError.prototype.__defineSetter__('name', fail); 53 ReferenceError.prototype.__defineSetter__('message', fail); 54 ReferenceError.prototype.__defineSetter__('stack', fail); 55 56 var e = new ReferenceError(); 57 assertTrue(e.hasOwnProperty('stack')); 58 59 var e = new ReferenceError('123'); 60 assertTrue(e.hasOwnProperty('message')); 61 assertTrue(e.hasOwnProperty('stack')); 62 63 try { 64 eval("var error = reference"); 65 } catch (error) { 66 e = error; 67 } 68 69 assertTrue(e.hasOwnProperty('stack')); 70 71 // Check that intercepting property access from toString is prevented for 72 // compiler errors. This is not specified, but allowing interception through a 73 // getter can leak error objects from different script tags in the same context 74 // in a browser setting. Use Realm.eval as a proxy for loading scripts. We 75 // ignore the exception thrown from it since that would not be catchable from 76 // user-land code. 77 var errors = [SyntaxError, ReferenceError, TypeError, RangeError, URIError]; 78 var error_triggers = ["syntax error", 79 "var error = reference", 80 "undefined()", 81 "String.fromCodePoint(0xFFFFFF)", 82 "decodeURI('%F')"]; 83 for (var i in errors) { 84 // Monkey-patch prototype. 85 for (var prop of ["name", "message", "stack"]) { 86 errors[i].prototype.__defineGetter__(prop, fail); 87 } 88 // String conversion should not invoke monkey-patched getters on prototype. 89 assertThrows(()=>Realm.eval(0, error_triggers[i])); 90 } 91 92 // Monkey-patching non-internal errors should still be observable. 93 function MyError() {} 94 MyError.prototype = new Error; 95 var errors = [Error, RangeError, EvalError, URIError, 96 SyntaxError, ReferenceError, TypeError, MyError]; 97 for (var i in errors) { 98 errors[i].prototype.__defineGetter__("name", function() { return "my"; }); 99 errors[i].prototype.__defineGetter__("message", function() { return "moo"; }); 100 var e = new errors[i]; 101 assertEquals("my: moo", e.toString()); 102 } 103 104 105 Error.prototype.toString = Object.prototype.toString; 106 assertEquals("[object Object]", Error.prototype.toString()); 107 assertEquals(Object.prototype, Error.prototype.__proto__); 108 var e = new Error("foo"); 109 assertEquals("[object Error]", e.toString()); 110
