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 // Should not take a very long time (n^2 algorithms are bad) 31 32 function do_slices() { 33 var data = new Array(1024 * 12); // 12kB 34 35 for (var i = 0; i < data.length; i++) { 36 data[i] = 255; 37 } 38 39 var start = Date.now(); 40 41 for (i = 0; i < 20000; i++) { 42 data.slice(4, 1); 43 } 44 45 return Date.now() - start; 46 } 47 48 // Reset the GC stress mode to be off. Needed so that the runtime of this test 49 // stays within bounds even if we run in GC stress mode. 50 %SetFlags("--gc-interval=-1 --noforce-marking-deque-overflows"); 51 52 // Should never take more than 3 seconds (if the bug is fixed, the test takes 53 // considerably less time than 3 seconds). 54 assertTrue(do_slices() < (3 * 1000)); 55 56 // Make sure that packed and unpacked array slices are still properly handled 57 var holey_array = [1, 2, 3, 4, 5,,,,,,]; 58 assertFalse(%HasFastHoleyElements(holey_array.slice(6, 1))); 59 assertEquals(undefined, holey_array.slice(6, 7)[0]) 60 assertFalse(%HasFastHoleyElements(holey_array.slice(2, 1))); 61 assertEquals(3, holey_array.slice(2, 3)[0]) 62