1 // Copyright 2013 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 // Flags: --allow-natives-syntax 29 30 "use strict"; 31 32 // Function is defined on the prototype chain. 33 var holder = { f: function() { return 42; } }; 34 var receiver = { }; 35 receiver.__proto__ = { }; 36 receiver.__proto__.__proto__ = holder; 37 38 // Inline two levels. 39 function h(o) { return o.f.apply(this, arguments); } 40 function g(o) { return h(o); } 41 42 // Collect type information for apply call. 43 assertEquals(42, g(receiver)); 44 assertEquals(42, g(receiver)); 45 46 // Sneakily remove the function from the prototype chain. 47 // The receiver map does not change. 48 receiver.__proto__.__proto__ = {}; 49 50 // Lookup of o.f during graph creation fails. 51 %OptimizeFunctionOnNextCall(g); 52 53 assertThrows(function() { g(receiver); }); 54 55 // Put function back. 56 receiver.__proto__.__proto__ = holder; 57 assertEquals(42, g(receiver)); 58
