JezK
Edit File: debug-liveedit-check-stack.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 unique_id = 1; function TestBase(name) { print("TestBase constructor: " + name); this.ChooseAnimal = eval( "/* " + unique_id + "*/\n" + "(function ChooseAnimal(callback) {\n " + " callback();\n" + " return 'Cat';\n" + "})\n" ); // Prevents eval script caching. unique_id++; var script = Debug.findScript(this.ChooseAnimal); var orig_animal = "'Cat'"; var patch_pos = script.source.indexOf(orig_animal); var new_animal_patch = "'Capybara'"; var got_exception = false; var successfully_changed = false; // Should be called from Debug context. this.ScriptChanger = function() { assertEquals(false, successfully_changed, "applying patch second time"); // Runs in debugger context. var change_log = new Array(); try { Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_animal.length, new_animal_patch, change_log); } finally { print("Change log: " + JSON.stringify(change_log) + "\n"); } successfully_changed = true; }; } function Noop() {} function WrapInCatcher(f, holder) { return function() { delete holder[0]; try { f(); } catch (e) { if (e instanceof Debug.LiveEdit.Failure) { holder[0] = e; } else { throw e; } } }; } function WrapInNativeCall(f) { return function() { return Debug.ExecuteInDebugContext(f, true); }; } function WrapInDebuggerCall(f) { return function() { return Debug.ExecuteInDebugContext(f, false); }; } function WrapInRestartProof(f) { var already_called = false; return function() { if (already_called) { return; } already_called = true; f(); } } function WrapInConstructor(f) { return function() { return new function() { f(); }; } } // A series of tests. In each test we call ChooseAnimal function that calls // a callback that attempts to modify the function on the fly. test = new TestBase("First test ChooseAnimal without edit"); assertEquals("Cat", test.ChooseAnimal(Noop)); test = new TestBase("Test without function on stack"); test.ScriptChanger(); assertEquals("Capybara", test.ChooseAnimal(Noop)); test = new TestBase("Test with function on stack"); assertEquals("Capybara", test.ChooseAnimal(WrapInDebuggerCall(WrapInRestartProof(test.ScriptChanger)))); test = new TestBase("Test with function on stack and with constructor frame"); assertEquals("Capybara", test.ChooseAnimal(WrapInConstructor(WrapInDebuggerCall(WrapInRestartProof(test.ScriptChanger))))); test = new TestBase("Test with C++ frame above ChooseAnimal frame"); exception_holder = {}; assertEquals("Cat", test.ChooseAnimal(WrapInNativeCall(WrapInDebuggerCall(WrapInCatcher(test.ScriptChanger, exception_holder))))); assertTrue(!!exception_holder[0]);