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 // The type feedback oracle had a bug when retrieving the map from an IC 31 // starting with a negative lookup. 32 33 // Create a holder in fast mode. 34 var holder = Object.create(null, { 35 holderMethod: {value: function() {}} 36 }); 37 assertTrue(%HasFastProperties(holder)); 38 39 // Create a receiver into dictionary mode. 40 var receiver = Object.create(holder, { 41 killMe: {value: 0, configurable: true}, 42 }); 43 delete receiver.killMe; 44 assertFalse(%HasFastProperties(receiver)); 45 46 // The actual function to test, triggering the retrieval of the wrong map. 47 function callConstantFunctionOnPrototype(obj) { 48 obj.holderMethod(); 49 } 50 51 callConstantFunctionOnPrototype(receiver); 52 callConstantFunctionOnPrototype(receiver); 53 %OptimizeFunctionOnNextCall(callConstantFunctionOnPrototype); 54 callConstantFunctionOnPrototype(receiver); 55 56 // Make sure that the function is still optimized. 57 assertOptimized(callConstantFunctionOnPrototype); 58
