d4dae20a12
http://code.google.com/p/v8/issues/detail?id=186 Create a new instance type for context extension objects. Use it to not use the __proto__ accessor for context extension objects. Review URL: http://codereview.chromium.org/18044 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
73 lines
2.8 KiB
JavaScript
73 lines
2.8 KiB
JavaScript
// Copyright 2009 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.
|
|
|
|
// Make sure that eval can introduce a local variable called __proto__.
|
|
// See http://code.google.com/p/v8/issues/detail?id=186
|
|
|
|
var setterCalled = false;
|
|
|
|
var o = {};
|
|
o.__defineSetter__("x", function() { setterCalled = true; });
|
|
|
|
function runTest(test) {
|
|
setterCalled = false;
|
|
test();
|
|
}
|
|
|
|
function testLocal() {
|
|
// Add property called __proto__ to the extension object.
|
|
eval("var __proto__ = o");
|
|
// Check that the extension object's prototype did not change.
|
|
eval("var x = 27");
|
|
assertFalse(setterCalled, "prototype of extension object changed");
|
|
assertEquals(o, eval("__proto__"));
|
|
}
|
|
|
|
function testConstLocal() {
|
|
// Add const property called __proto__ to the extension object.
|
|
eval("const __proto__ = o");
|
|
// Check that the extension object's prototype did not change.
|
|
eval("var x = 27");
|
|
assertFalse(setterCalled, "prototype of extension object changed");
|
|
assertEquals(o, eval("__proto__"));
|
|
}
|
|
|
|
function testGlobal() {
|
|
// Assign to the global __proto__ property.
|
|
eval("__proto__ = o");
|
|
// Check that the prototype of the global object changed.
|
|
eval("x = 27");
|
|
assertTrue(setterCalled, "prototype of global object did not change");
|
|
setterCalled = false;
|
|
assertEquals(o, eval("__proto__"));
|
|
}
|
|
|
|
runTest(testLocal);
|
|
runTest(testConstLocal);
|
|
runTest(testGlobal);
|
|
|