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 --expose-gc 29 // Flags: --noalways-opt 30 31 function isHoley(obj) { 32 if (%HasFastHoleyElements(obj)) return true; 33 return false; 34 } 35 36 function assertHoley(obj, name_opt) { 37 assertEquals(true, isHoley(obj), name_opt); 38 } 39 40 function assertNotHoley(obj, name_opt) { 41 assertEquals(false, isHoley(obj), name_opt); 42 } 43 44 function create_array(arg) { 45 return new Array(arg); 46 } 47 48 obj = create_array(0); 49 assertNotHoley(obj); 50 create_array(0); 51 %OptimizeFunctionOnNextCall(create_array); 52 obj = create_array(10); 53 assertHoley(obj); 54 55 // The code below would assert in debug or crash in release 56 function f(length) { 57 return new Array(length) 58 } 59 60 f(0); 61 f(0); 62 %OptimizeFunctionOnNextCall(f); 63 var a = f(10); 64 65 function g(a) { 66 return a[0]; 67 } 68 69 var b = [0]; 70 g(b); 71 g(b); 72 assertEquals(undefined, g(a)); 73
