1 // Copyright 2012 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 function ToDictionaryMode(x) { 31 %OptimizeObjectForAddingMultipleProperties(x, 100); 32 } 33 34 var A, B, C; 35 36 // The initial bug report was about calling a know function... 37 A = {}; 38 Object.defineProperty(A, "foo", { value: function() { assertUnreachable(); }}); 39 40 B = Object.create(A); 41 Object.defineProperty(B, "foo", { value: function() { return 111; }}); 42 43 C = Object.create(B); 44 45 function bar(x) { return x.foo(); } 46 47 assertEquals(111, bar(C)); 48 assertEquals(111, bar(C)); 49 ToDictionaryMode(B); 50 %OptimizeFunctionOnNextCall(bar); 51 assertEquals(111, bar(C)); 52 53 // Although this was not in the initial bug report: The same for getters... 54 A = {}; 55 Object.defineProperty(A, "baz", { get: function() { assertUnreachable(); }}); 56 57 B = Object.create(A); 58 Object.defineProperty(B, "baz", { get: function() { return 111; }}); 59 60 C = Object.create(B); 61 62 function boo(x) { return x.baz; } 63 64 assertEquals(111, boo(C)); 65 assertEquals(111, boo(C)); 66 ToDictionaryMode(B); 67 %OptimizeFunctionOnNextCall(boo); 68 assertEquals(111, boo(C)); 69 70 // And once more for setters... 71 A = {}; 72 Object.defineProperty(A, "huh", { set: function(x) { assertUnreachable(); }}); 73 74 B = Object.create(A); 75 var setterValue; 76 Object.defineProperty(B, "huh", { set: function(x) { setterValue = x; }}); 77 78 C = Object.create(B); 79 80 function fuu(x) { 81 setterValue = 222; 82 x.huh = 111; 83 return setterValue; 84 } 85 86 assertEquals(111, fuu(C)); 87 assertEquals(111, fuu(C)); 88 ToDictionaryMode(B); 89 %OptimizeFunctionOnNextCall(fuu); 90 assertEquals(111, fuu(C)); 91
