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 29 30 // stubbed version of ToNumber 31 function ToNumber(x) { 32 return 311; 33 } 34 35 // Reduced version of String.fromCharCode; 36 // does not actually do the same calculation but exhibits untagging bug. 37 function StringFromCharCode(code) { 38 var n = %_ArgumentsLength(); 39 var one_byte = %NewString(n, true); 40 var i; 41 for (i = 0; i < n; i++) { 42 var code = %_Arguments(i); 43 if (!%_IsSmi(code)) code = ToNumber(code) & 0xffff; 44 if (code > 0xff) break; 45 } 46 47 var two_byte = %NewString(n - i, false); 48 for (var j = 0; i < n; i++, j++) { 49 var code = %_Arguments(i); 50 %_TwoByteSeqStringSetChar(j, code, two_byte); 51 } 52 return one_byte + two_byte; 53 } 54 55 StringFromCharCode(0xFFF, 0xFFF); 56 StringFromCharCode(0x7C, 0x7C); 57 %OptimizeFunctionOnNextCall(StringFromCharCode); 58 StringFromCharCode(0x7C, 0x7C); 59 StringFromCharCode(0xFFF, 0xFFF); 60
