1 // Copyright 2008 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 // This test fails because we copy the arguments array on indirect 29 // access 30 31 function g(f) { 32 assertEquals(100, f.arguments = 100); // read-only 33 assertEquals(3, f.arguments.length); 34 assertEquals(1, f.arguments[0]); 35 assertEquals(2, f.arguments[1]); 36 assertEquals(3, f.arguments[2]); 37 f.arguments[0] = 999; 38 f.arguments.extra = 'kallevip'; 39 } 40 41 function h(f) { 42 assertEquals('kallevip', f.arguments.extra); 43 return f.arguments; 44 } 45 46 // Test function with a materialized arguments array. 47 function f0() { 48 g(f0); 49 var result = h(f0); 50 var a = arguments; 51 assertEquals(999, a[0]); 52 return result; 53 } 54 55 56 // Test function without a materialized arguments array. 57 function f1(x) { 58 g(f1); 59 var result = h(f1); 60 assertEquals(999, x); 61 return result; 62 } 63 64 65 function test(f) { 66 assertTrue(null === f.arguments); 67 var args = f(1,2,3); 68 assertTrue(null === f.arguments); 69 70 assertEquals(3, args.length); 71 assertEquals(999, args[0]); 72 assertEquals(2, args[1]); 73 assertEquals(3, args[2]); 74 assertEquals('kallevip', args.extra); 75 } 76 77 test(f0); 78 test(f1); 79 80 81 82 83 function w() { 84 return q.arguments; 85 } 86 87 function q(x, y) { 88 x = 2; 89 var result = w(); 90 y = 3; 91 return result; 92 } 93 94 var a = q(0, 1); 95 // x is set locally *before* the last use of arguments before the 96 // activation of q is popped from the stack. 97 assertEquals(2, a[0]); 98 // y is set locally *after* the last use of arguments before the 99 // activation of q is popped from the stack. 100 assertEquals(1, a[1]); 101
