1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Check that message and name are not enumerable on Error objects.
var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name');
assertFalse(desc['enumerable']);
desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message');
assertFalse(desc['enumerable']);
var e = new Error("foobar");
desc = Object.getOwnPropertyDescriptor(e, 'message');
assertFalse(desc['enumerable']);
desc = Object.getOwnPropertyDescriptor(e, 'stack');
assertFalse(desc['enumerable']);
var e = new Error();
assertFalse(e.hasOwnProperty('message'));
// name is not tested above, but in addition we should have no enumerable
// properties, so we simply assert that.
for (var v in e) {
assertUnreachable();
}
// Check that error construction does not call setters for the
// properties on error objects in prototypes.
function fail() { assertUnreachable(); };
ReferenceError.prototype.__defineSetter__('name', fail);
ReferenceError.prototype.__defineSetter__('message', fail);
ReferenceError.prototype.__defineSetter__('stack', fail);
var e = new ReferenceError();
assertTrue(e.hasOwnProperty('stack'));
var e = new ReferenceError('123');
assertTrue(e.hasOwnProperty('message'));
assertTrue(e.hasOwnProperty('stack'));
try {
eval("var error = reference");
} catch (error) {
e = error;
}
assertTrue(e.hasOwnProperty('stack'));
// Check that intercepting property access from toString is prevented for
// compiler errors. This is not specified, but allowing interception
// through a getter can leak error objects from different
// script tags in the same context in a browser setting.
var errors = [SyntaxError, ReferenceError, TypeError, RangeError, URIError];
var error_triggers = ["syntax error",
"var error = reference",
"undefined()",
"String.fromCodePoint(0xFFFFFF)",
"decodeURI('%F')"];
for (var i in errors) {
var name = errors[i].name;
// Monkey-patch prototype.
var props = ["name", "message", "stack"];
for (var j in props) {
errors[i].prototype.__defineGetter__(props[j], fail);
}
// String conversion should not invoke monkey-patched getters on prototype.
var error;
try {
eval(error_triggers[i]);
} catch (e) {
error = e;
}
assertTrue(error.toString().startsWith(name));
// Deleting message on the error (exposing the getter) is fine.
delete error.message;
assertEquals(name, error.toString());
// Custom properties shadowing the name are fine.
var myerror = { name: "myerror", message: "mymessage"};
myerror.__proto__ = error;
assertEquals("myerror: mymessage", myerror.toString());
// Custom getters in actual objects are welcome.
error.__defineGetter__("name", function() { return "mine"; });
assertEquals("mine", error.toString());
// Custom properties shadowing the name are fine.
var myerror2 = { message: "mymessage"};
myerror2.__proto__ = error;
assertEquals("mine: mymessage", myerror2.toString());
}
// Monkey-patching non-internal errors should still be observable.
function MyError() {}
MyError.prototype = new Error;
var errors = [Error, RangeError, EvalError, URIError,
SyntaxError, ReferenceError, TypeError, MyError];
for (var i in errors) {
errors[i].prototype.__defineGetter__("name", function() { return "my"; });
errors[i].prototype.__defineGetter__("message", function() { return "moo"; });
var e = new errors[i];
assertEquals("my: moo", e.toString());
}
Error.prototype.toString = Object.prototype.toString;
assertEquals("[object Error]", Error.prototype.toString());
assertEquals(Object.prototype, Error.prototype.__proto__);
var e = new Error("foo");
assertEquals("[object Error]", e.toString());
|
