| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --allow-natives-syntax |
| |
| function A() { |
| this.a = "a"; |
| } |
| var a = new A(); |
| |
| function B() { |
| this.b = "b"; |
| } |
| B.prototype = a; |
| |
| function C() { |
| this.c = "c"; |
| } |
| C.prototype = new B(); |
| |
| var c = new C(); |
| |
| function f(expected) { |
| var result = c.z; |
| assertEquals(expected, result); |
| } |
| f(undefined); |
| f(undefined); |
| %OptimizeFunctionOnNextCall(f); |
| f(undefined); |
| a.z = "z"; |
| f("z"); |
| f("z"); |
| |
| // Test updating .__proto__ pointers. |
| var p1 = {foo: 1.5}; |
| var p2 = {}; p2.__proto__ = p1; |
| var p3 = {}; p3.__proto__ = p2; |
| var o = {}; o.__proto__ = p3; |
| |
| for (var i = 0; i < 2; i++) o.foo; // Force registration. |
| |
| var p1a = {foo: 1.7}; |
| p2.__proto__ = p1a; |
| |
| function g(o, expected) { |
| var result = o.foo; |
| assertEquals(expected, result); |
| } |
| |
| g(o, 1.7); |
| g(o, 1.7); |
| g(o, 1.7); |
| Object.defineProperty(p1a, "foo", {get: function() { return "foo"}}); |
| g(o, "foo"); |