1 // Copyright 2010 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 // Test dictionary store ICs. 29 30 // Function that stores property 'x' on an object. 31 function store(obj) { obj.x = 42; } 32 33 // Create object and force it to dictionary mode by deleting property. 34 var o = { x: 32, y: 33 }; 35 delete o.y; 36 37 // Make the store ic in the 'store' function go into dictionary store 38 // case. 39 for (var i = 0; i < 3; i++) { 40 store(o); 41 } 42 assertEquals(42, o.x); 43 44 // Test that READ_ONLY property attribute is respected. Make 'x' 45 // READ_ONLY. 46 Object.defineProperty(o, 'x', { value: 32, writable: false }); 47 48 // Attempt to store using the store ic in the 'store' function. 49 store(o); 50 51 // Check that the store did not change the value. 52 assertEquals(32, o.x); 53 54 // Check that bail-out code works. 55 // Smi. 56 store(1); 57 // Fast case object. 58 o = new Object(); 59 store(o); 60 assertEquals(42, o.x); 61 // Slow case object without x property. 62 delete o.x; 63 store(o); 64 assertEquals(42, o.x); 65
