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: --expose-gc --allow-natives-syntax 29 30 function test() { 31 var s1 = %NewString(26, true); 32 for (i = 0; i < 26; i++) %_OneByteSeqStringSetChar(s1, i, i+65); 33 assertEquals("ABCDEFGHIJKLMNOPQRSTUVWXYZ", s1); 34 s1 = %TruncateString(s1, 13); 35 assertEquals("ABCDEFGHIJKLM", s1); 36 37 var s2 = %NewString(26, false); 38 for (i = 0; i < 26; i++) %_TwoByteSeqStringSetChar(s2, i, i+65); 39 assertEquals("ABCDEFGHIJKLMNOPQRSTUVWXYZ", s2); 40 s2 = %TruncateString(s1, 13); 41 assertEquals("ABCDEFGHIJKLM", s2); 42 43 var s3 = %NewString(26, false); 44 for (i = 0; i < 26; i++) %_TwoByteSeqStringSetChar(s3, i, i+1000); 45 for (i = 0; i < 26; i++) assertEquals(s3[i], String.fromCharCode(i+1000)); 46 47 var a = []; 48 for (var i = 0; i < 1000; i++) { 49 var s = %NewString(10000, i % 2 == 1); 50 a.push(s); 51 } 52 53 gc(); 54 55 for (var i = 0; i < 1000; i++) { 56 assertEquals(10000, a[i].length); 57 a[i] = %TruncateString(a[i], 5000); 58 } 59 60 gc(); 61 62 for (var i = 0; i < 1000; i++) { 63 assertEquals(5000, a[i].length); 64 } 65 } 66 67 68 test(); 69 test(); 70 %OptimizeFunctionOnNextCall(test); 71 test(); 72 73
