19258b6bc66e09368ada54001f619d53b4fc976d5ager@chromium.org// Copyright 2008 the V8 project authors. All rights reserved. 29a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Redistribution and use in source and binary forms, with or without 39a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// modification, are permitted provided that the following conditions are 49a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// met: 59a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// 69a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// * Redistributions of source code must retain the above copyright 79a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// notice, this list of conditions and the following disclaimer. 89a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// * Redistributions in binary form must reproduce the above 99a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// copyright notice, this list of conditions and the following 109a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// disclaimer in the documentation and/or other materials provided 119a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// with the distribution. 129a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// * Neither the name of Google Inc. nor the names of its 139a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// contributors may be used to endorse or promote products derived 149a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// from this software without specific prior written permission. 159a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// 169a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 179a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 189a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 199a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 209a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 219a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 229a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 239a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 249a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 259a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 269a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 279a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 289a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Flags: --expose-debug-as debug 299a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Get the Debug object exposed from the debug context global object. 309a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comDebug = debug.Debug 319a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 329a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Simple object. 339a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comvar a = {}; 349a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 359a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Create mirror for the object. 369a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comvar mirror = debug.MakeMirror(a); 379a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 389a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Initially one reference from the global object. 399a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(1, mirror.referencedBy().length); 409a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(1, mirror.referencedBy(0).length); 419a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(1, mirror.referencedBy(1).length); 429a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(1, mirror.referencedBy(10).length); 439a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 449a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Add some more references from simple objects and arrays. 459a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comvar b = {} 469a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comb.a = a; 479a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(2, mirror.referencedBy().length); 489a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comvar c = {} 499a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comc.a = a; 509a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comc.aa = a; 519a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comc.aaa = a; 529a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(3, mirror.referencedBy().length); 539a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comfunction d(){}; 549a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comd.a = a 559a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(4, mirror.referencedBy().length); 569a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.come = [a,b,c,d]; 579a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(5, mirror.referencedBy().length); 589a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 599a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 609a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Simple closure. 619a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comfunction closure_simple(p) { 629a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com return function() { p = null; }; 639a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com} 649a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 659a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// This adds a reference (function context). 669a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comf = closure_simple(a); 679a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(6, mirror.referencedBy().length); 689a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// This clears the reference (in function context). 699a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comf() 709a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(5, mirror.referencedBy().length); 719a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 729a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Use closure with eval - creates arguments array. 739a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comfunction closure_eval(p, s) { 749a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com if (s) { 759a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com eval(s); 769a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com } 779a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com return function e(s) { eval(s); }; 789a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com} 799a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 809a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// This adds a references (function context). 819a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comg = closure_eval(a); 829a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(6, mirror.referencedBy().length); 839a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 849a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Dynamically create a variable. This should create a context extension. 859a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comh = closure_eval(null, "var x_"); 869a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(6, mirror.referencedBy().length); 879a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Adds a reference when set. 889a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comh("x_ = a"); 899a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comvar x = mirror.referencedBy(); 90245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.orgassertEquals(7, mirror.referencedBy().length); 919a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Removes a reference when cleared. 929a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comh("x_ = null"); 939a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(6, mirror.referencedBy().length); 949a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 959a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Check circular references. 969a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comx = {} 979a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.commirror = debug.MakeMirror(x); 989a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(1, mirror.referencedBy().length); 999a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comx.x = x; 1009a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(2, mirror.referencedBy().length); 1019a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comx = null; 1029a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(0, mirror.referencedBy().length); 1039a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com 1049a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com// Check many references. 1059a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comy = {} 1069a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.commirror = debug.MakeMirror(y); 1079a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comrefs = []; 1089a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comfor (var i = 0; i < 200; i++) { 1099a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com refs[i] = {'y': y}; 1109a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.com} 1119a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comy = null; 1129a4089a092cad9ff23b6416b92cd5d818dc101d1mads.s.ager@gmail.comassertEquals(200, mirror.referencedBy().length); 113