1 // Copyright 2009 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 function ReturnArguments() { 29 return arguments; 30 } 31 32 function ReturnReceiver() { 33 return this; 34 } 35 36 37 function Global() { 38 return ReturnArguments.apply(this, arguments); 39 } 40 41 assertEquals(0, Global().length); 42 assertEquals(1, Global(1).length); 43 assertEquals(2, Global(2)[0]); 44 assertEquals(2, Global(3, 4).length); 45 assertEquals(3, Global(3, 4)[0]); 46 assertEquals(4, Global(3, 4)[1]); 47 48 49 function Local() { 50 var object = { f: ReturnArguments }; 51 return object.f.apply(this, arguments); 52 } 53 54 assertEquals(0, Local().length); 55 assertEquals(1, Local(1).length); 56 assertEquals(2, Local(2)[0]); 57 assertEquals(2, Local(3, 4).length); 58 assertEquals(3, Local(3, 4)[0]); 59 assertEquals(4, Local(3, 4)[1]); 60 61 62 function ShadowArguments() { 63 var arguments = [3, 4]; 64 return ReturnArguments.apply(this, arguments); 65 } 66 67 assertEquals(2, ShadowArguments().length); 68 assertEquals(3, ShadowArguments()[0]); 69 assertEquals(4, ShadowArguments()[1]); 70 71 72 function NonObjectReceiver(receiver) { 73 return ReturnReceiver.apply(receiver, arguments); 74 } 75 76 assertEquals(Object(42), NonObjectReceiver(42)); 77 assertEquals("object", typeof NonObjectReceiver(42)); 78 assertInstanceof(NonObjectReceiver(42), Number); 79 assertSame(this, NonObjectReceiver(null)); 80 assertSame(this, NonObjectReceiver(void 0)); 81 82 83 function FunctionReceiver() { 84 return ReturnReceiver.apply(Object, arguments); 85 } 86 87 assertTrue(Object === FunctionReceiver()); 88 89 90 function ShadowApply() { 91 function f() { return 42; } 92 f.apply = function() { return 87; } 93 return f.apply(this, arguments); 94 } 95 96 assertEquals(87, ShadowApply()); 97 assertEquals(87, ShadowApply(1)); 98 assertEquals(87, ShadowApply(1, 2)); 99 100 101 function CallNonFunction() { 102 var object = { apply: Function.prototype.apply }; 103 return object.apply(this, arguments); 104 } 105 106 assertThrows(CallNonFunction, TypeError); 107 108 109 // Make sure that the stack after the apply optimization is 110 // in a valid state. 111 function SimpleStackCheck() { 112 var sentinel = 42; 113 var result = ReturnArguments.apply(this, arguments); 114 assertTrue(result != null); 115 assertEquals(42, sentinel); 116 } 117 118 SimpleStackCheck(); 119 120 121 function ShadowArgumentsWithConstant() { 122 var arguments = null; 123 return ReturnArguments.apply(this, arguments); 124 } 125 126 assertEquals(0, ShadowArgumentsWithConstant().length); 127 assertEquals(0, ShadowArgumentsWithConstant(1).length); 128 assertEquals(0, ShadowArgumentsWithConstant(1, 2).length); 129 130 131 // Make sure we can deal with unfolding lots of arguments on the 132 // stack even in the presence of the apply optimizations. 133 var array = new Array(2048); 134 assertEquals(2048, Global.apply(this, array).length); 135