JezK
Edit File: debug-liveedit-2.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --expose-debug-as debug // Get the Debug object exposed from the debug context global object. Debug = debug.Debug eval("function ChooseAnimal(p) {\n " + " if (p == 7) {\n" + // Use p " return;\n" + " }\n" + " return function Chooser() {\n" + " return 'Cat';\n" + " };\n" + "}\n"); var old_closure = ChooseAnimal(19); assertEquals("Cat", old_closure()); var script = Debug.findScript(ChooseAnimal); var orig_animal = "'Cat'"; var patch_pos = script.source.indexOf(orig_animal); var new_animal_patch = "'Capybara' + p"; // We patch innermost function "Chooser". // However, this does not actually patch existing "Chooser" instances, // because old value of parameter "p" was not saved. // Instead it patches ChooseAnimal. var change_log = new Array(); Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_animal.length, new_animal_patch, change_log); print("Change log: " + JSON.stringify(change_log) + "\n"); var new_closure = ChooseAnimal(19); // New instance of closure is patched. assertEquals("Capybara19", new_closure()); // Old instance of closure is not patched. assertEquals("Cat", old_closure());