Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 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 | // Flags: --expose-debug-as debug |
| 29 | // Get the Debug object exposed from the debug context global object. |
| 30 | Debug = debug.Debug |
| 31 | |
| 32 | // Simple object. |
| 33 | var a = {}; |
| 34 | |
| 35 | // Create mirror for the object. |
| 36 | var mirror = debug.MakeMirror(a); |
| 37 | |
| 38 | // Initially one reference from the global object. |
| 39 | assertEquals(1, mirror.referencedBy().length); |
| 40 | assertEquals(1, mirror.referencedBy(0).length); |
| 41 | assertEquals(1, mirror.referencedBy(1).length); |
| 42 | assertEquals(1, mirror.referencedBy(10).length); |
| 43 | |
| 44 | // Add some more references from simple objects and arrays. |
| 45 | var b = {} |
| 46 | b.a = a; |
| 47 | assertEquals(2, mirror.referencedBy().length); |
| 48 | var c = {} |
| 49 | c.a = a; |
| 50 | c.aa = a; |
| 51 | c.aaa = a; |
| 52 | assertEquals(3, mirror.referencedBy().length); |
| 53 | function d(){}; |
| 54 | d.a = a |
| 55 | assertEquals(4, mirror.referencedBy().length); |
| 56 | e = [a,b,c,d]; |
| 57 | assertEquals(5, mirror.referencedBy().length); |
| 58 | |
| 59 | |
| 60 | // Simple closure. |
| 61 | function closure_simple(p) { |
| 62 | return function() { p = null; }; |
| 63 | } |
| 64 | |
| 65 | // This adds a reference (function context). |
| 66 | f = closure_simple(a); |
| 67 | assertEquals(6, mirror.referencedBy().length); |
| 68 | // This clears the reference (in function context). |
| 69 | f() |
| 70 | assertEquals(5, mirror.referencedBy().length); |
| 71 | |
| 72 | // Use closure with eval - creates arguments array. |
| 73 | function closure_eval(p, s) { |
| 74 | if (s) { |
| 75 | eval(s); |
| 76 | } |
| 77 | return function e(s) { eval(s); }; |
| 78 | } |
| 79 | |
| 80 | // This adds a references (function context). |
| 81 | g = closure_eval(a); |
| 82 | assertEquals(6, mirror.referencedBy().length); |
| 83 | |
| 84 | // Dynamically create a variable. This should create a context extension. |
| 85 | h = closure_eval(null, "var x_"); |
| 86 | assertEquals(6, mirror.referencedBy().length); |
| 87 | // Adds a reference when set. |
| 88 | h("x_ = a"); |
| 89 | var x = mirror.referencedBy(); |
| 90 | assertEquals(7, mirror.referencedBy().length); |
| 91 | // Removes a reference when cleared. |
| 92 | h("x_ = null"); |
| 93 | assertEquals(6, mirror.referencedBy().length); |
| 94 | |
| 95 | // Check circular references. |
| 96 | x = {} |
| 97 | mirror = debug.MakeMirror(x); |
| 98 | assertEquals(1, mirror.referencedBy().length); |
| 99 | x.x = x; |
| 100 | assertEquals(2, mirror.referencedBy().length); |
| 101 | x = null; |
| 102 | assertEquals(0, mirror.referencedBy().length); |
| 103 | |
| 104 | // Check many references. |
| 105 | y = {} |
| 106 | mirror = debug.MakeMirror(y); |
| 107 | refs = []; |
| 108 | for (var i = 0; i < 200; i++) { |
| 109 | refs[i] = {'y': y}; |
| 110 | } |
| 111 | y = null; |
| 112 | assertEquals(200, mirror.referencedBy().length); |