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Revert 6220 (generic descriptor support in Object.defineOwnProperty)

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This change caused a webkit failure in http/tests/security/xss-DENIED-defineProperty.html.

 I will look into this and reapply when I find a solution.




Review URL: http://codereview.chromium.org/6134005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6232 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
ricow@chromium.org 2011-01-10 07:20:54 +00:00
parent dae44fd3ee
commit cd6bd8c4fa
3 changed files with 34 additions and 110 deletions
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13
src/runtime.cc
View File

@ -3499,12 +3499,7 @@ static MaybeObject* Runtime_KeyedGetProperty(Arguments args) {
args.at<Object>(1));
}
// Implements part of 8.12.9 DefineOwnProperty.
// There are 3 cases that lead here:
// Step 4b - define a new accessor property.
// Steps 9c & 12 - replace an existing data property with an accessor property.
// Step 12 - update an existing accessor property with an accessor or generic
// descriptor.
static MaybeObject* Runtime_DefineOrRedefineAccessorProperty(Arguments args) {
ASSERT(args.length() == 5);
HandleScope scope;
@ -3536,12 +3531,6 @@ static MaybeObject* Runtime_DefineOrRedefineAccessorProperty(Arguments args) {
return obj->DefineAccessor(name, flag_setter->value() == 0, fun, attr);
}
// Implements part of 8.12.9 DefineOwnProperty.
// There are 3 cases that lead here:
// Step 4a - define a new data property.
// Steps 9b & 12 - replace an existing accessor property with a data property.
// Step 12 - update an existing data property with a data or generic
// descriptor.
static MaybeObject* Runtime_DefineOrRedefineDataProperty(Arguments args) {
ASSERT(args.length() == 4);
HandleScope scope;

89
src/v8natives.js
View File

@ -545,12 +545,10 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
if (IS_UNDEFINED(current) && !extensible)
throw MakeTypeError("define_disallowed", ["defineProperty"]);
if (!IS_UNDEFINED(current)) {
if (!IS_UNDEFINED(current) && !current.isConfigurable()) {
// Step 5 and 6
if ((IsGenericDescriptor(desc) ||
IsDataDescriptor(desc) == IsDataDescriptor(current)) &&
(!desc.hasEnumerable() ||
SameValue(desc.isEnumerable(), current.isEnumerable())) &&
if ((!desc.hasEnumerable() ||
SameValue(desc.isEnumerable() && current.isEnumerable())) &&
(!desc.hasConfigurable() ||
SameValue(desc.isConfigurable(), current.isConfigurable())) &&
(!desc.hasWritable() ||
@ -563,36 +561,30 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
SameValue(desc.getSet(), current.getSet()))) {
return true;
}
if (!current.isConfigurable()) {
// Step 7
if (desc.isConfigurable() ||
(desc.hasEnumerable() &&
desc.isEnumerable() != current.isEnumerable()))
// Step 7
if (desc.isConfigurable() || desc.isEnumerable() != current.isEnumerable())
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
// Step 9
if (IsDataDescriptor(current) != IsDataDescriptor(desc))
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
// Step 10
if (IsDataDescriptor(current) && IsDataDescriptor(desc)) {
if (!current.isWritable() && desc.isWritable())
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
if (!current.isWritable() && desc.hasValue() &&
!SameValue(desc.getValue(), current.getValue())) {
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
// Step 8
if (!IsGenericDescriptor(desc)) {
// Step 9a
if (IsDataDescriptor(current) != IsDataDescriptor(desc))
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
// Step 10a
if (IsDataDescriptor(current) && IsDataDescriptor(desc)) {
if (!current.isWritable() && desc.isWritable())
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
if (!current.isWritable() && desc.hasValue() &&
!SameValue(desc.getValue(), current.getValue())) {
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
}
}
// Step 11
if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) {
if (desc.hasSetter() && !SameValue(desc.getSet(), current.getSet())){
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
}
if (desc.hasGetter() && !SameValue(desc.getGet(),current.getGet()))
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
}
}
}
// Step 11
if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) {
if (desc.hasSetter() && !SameValue(desc.getSet(), current.getSet())){
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
}
if (desc.hasGetter() && !SameValue(desc.getGet(),current.getGet()))
throw MakeTypeError("redefine_disallowed", ["defineProperty"]);
}
}
// Send flags - enumerable and configurable are common - writable is
@ -615,16 +607,7 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
} else
flag |= DONT_DELETE;
if (IsDataDescriptor(desc) ||
(IsGenericDescriptor(desc) &&
(IS_UNDEFINED(current) || IsDataDescriptor(current)))) {
// There are 3 cases that lead here:
// Step 4a - defining a new data property.
// Steps 9b & 12 - replacing an existing accessor property with a data
// property.
// Step 12 - updating an existing data property with a data or generic
// descriptor.
if (IsDataDescriptor(desc) || IsGenericDescriptor(desc)) {
if (desc.hasWritable()) {
flag |= desc.isWritable() ? 0 : READ_ONLY;
} else if (!IS_UNDEFINED(current)) {
@ -632,30 +615,20 @@ function DefineOwnProperty(obj, p, desc, should_throw) {
} else {
flag |= READ_ONLY;
}
var value = void 0; // Default value is undefined.
if (desc.hasValue()) {
value = desc.getValue();
} else if (!IS_UNDEFINED(current) && IsDataDescriptor(current)) {
} else if (!IS_UNDEFINED(current)) {
value = current.getValue();
}
%DefineOrRedefineDataProperty(obj, p, value, flag);
} else if (IsGenericDescriptor(desc)) {
// Step 12 - updating an existing accessor property with a generic
// descriptor. Changing flags only.
%DefineOrRedefineAccessorProperty(obj, p, GETTER, current.getGet(), flag);
} else {
// There are 3 cases that lead here:
// Step 4b - defining a new accessor property.
// Steps 9c & 12 - replacing an existing data property with an accessor
// property.
// Step 12 - updating an existing accessor property with an accessor
// descriptor.
if (desc.hasGetter()) {
%DefineOrRedefineAccessorProperty(obj, p, GETTER, desc.getGet(), flag);
if (desc.hasGetter() &&
(IS_FUNCTION(desc.getGet()) || IS_UNDEFINED(desc.getGet()))) {
%DefineOrRedefineAccessorProperty(obj, p, GETTER, desc.getGet(), flag);
}
if (desc.hasSetter()) {
if (desc.hasSetter() &&
(IS_FUNCTION(desc.getSet()) || IS_UNDEFINED(desc.getSet()))) {
%DefineOrRedefineAccessorProperty(obj, p, SETTER, desc.getSet(), flag);
}
}

42
test/mjsunit/object-define-property.js
View File

@ -749,33 +749,14 @@ assertTrue(desc.writable);
assertTrue(desc.enumerable);
assertFalse(desc.configurable);
// Can use defineProperty to change the value of a non
// configurable property.
// Ensure that we can't overwrite the non configurable element.
try {
Object.defineProperty(obj6, '2', descElement);
desc = Object.getOwnPropertyDescriptor(obj6, '2');
assertEquals(desc.value, 'foobar');
} catch (e) {
assertUnreachable();
}
// Ensure that we can't change the descriptor of a
// non configurable property.
try {
var descAccessor = { get: function() { return 0; } };
Object.defineProperty(obj6, '2', descAccessor);
assertUnreachable();
} catch (e) {
assertTrue(/Cannot redefine property/.test(e));
}
Object.defineProperty(obj6, '2', descElementNonWritable);
desc = Object.getOwnPropertyDescriptor(obj6, '2');
assertEquals(desc.value, 'foofoo');
assertFalse(desc.writable);
assertTrue(desc.enumerable);
assertFalse(desc.configurable);
Object.defineProperty(obj6, '3', descElementNonWritable);
desc = Object.getOwnPropertyDescriptor(obj6, '3');
assertEquals(desc.value, 'foofoo');
@ -846,33 +827,14 @@ assertTrue(desc.writable);
assertTrue(desc.enumerable);
assertFalse(desc.configurable);
// Can use defineProperty to change the value of a non
// configurable property of an array.
// Ensure that we can't overwrite the non configurable element.
try {
Object.defineProperty(arr, '2', descElement);
desc = Object.getOwnPropertyDescriptor(arr, '2');
assertEquals(desc.value, 'foobar');
} catch (e) {
assertUnreachable();
}
// Ensure that we can't change the descriptor of a
// non configurable property.
try {
var descAccessor = { get: function() { return 0; } };
Object.defineProperty(arr, '2', descAccessor);
assertUnreachable();
} catch (e) {
assertTrue(/Cannot redefine property/.test(e));
}
Object.defineProperty(arr, '2', descElementNonWritable);
desc = Object.getOwnPropertyDescriptor(arr, '2');
assertEquals(desc.value, 'foofoo');
assertFalse(desc.writable);
assertTrue(desc.enumerable);
assertFalse(desc.configurable);
Object.defineProperty(arr, '3', descElementNonWritable);
desc = Object.getOwnPropertyDescriptor(arr, '3');
assertEquals(desc.value, 'foofoo');