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 --smi-only-arrays --expose-gc 29 // Flags: --noalways-opt 30 31 // Test element kind of objects. 32 // Since --smi-only-arrays affects builtins, its default setting at compile 33 // time sticks if built with snapshot. If --smi-only-arrays is deactivated 34 // by default, only a no-snapshot build actually has smi-only arrays enabled 35 // in this test case. Depending on whether smi-only arrays are actually 36 // enabled, this test takes the appropriate code path to check smi-only arrays. 37 38 // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 39 support_smi_only_arrays = true; 40 41 if (support_smi_only_arrays) { 42 print("Tests include smi-only arrays."); 43 } else { 44 print("Tests do NOT include smi-only arrays."); 45 } 46 47 function isHoley(obj) { 48 if (%HasFastHoleyElements(obj)) return true; 49 return false; 50 } 51 52 function assertHoley(obj, name_opt) { 53 assertEquals(true, isHoley(obj), name_opt); 54 } 55 56 function assertNotHoley(obj, name_opt) { 57 assertEquals(false, isHoley(obj), name_opt); 58 } 59 60 if (support_smi_only_arrays) { 61 function create_array(arg) { 62 return new Array(arg); 63 } 64 65 obj = create_array(0); 66 assertNotHoley(obj); 67 create_array(0); 68 %OptimizeFunctionOnNextCall(create_array); 69 obj = create_array(10); 70 assertHoley(obj); 71 } 72 73 // The code below would assert in debug or crash in release 74 function f(length) { 75 return new Array(length) 76 } 77 78 f(0); 79 f(0); 80 %OptimizeFunctionOnNextCall(f); 81 var a = f(10); 82 83 function g(a) { 84 return a[0]; 85 } 86 87 var b = [0]; 88 g(b); 89 g(b); 90 assertEquals(undefined, g(a)); 91
