// 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: --allow-natives-syntax Debug = debug.Debug unique_id = 1; function TestBase(name) { print("TestBase constructor: " + name); const original_source = '/* ' + unique_id + '*/\n' + '(function ChooseAnimal(callback) {\n ' + ' callback();\n' + ' return \'Cat\';\n' + '})\n'; const updated_source = original_source.replace('\'Cat\'', '\'Capybara\''); this.ChooseAnimal = eval(original_source); // Prevents eval script caching. unique_id++; const func = this.ChooseAnimal; var got_exception = false; var successfully_changed = false; // Should be called from Debug context. this.ScriptChanger = () => { assertEquals(false, successfully_changed, "applying patch second time"); %LiveEditPatchScript(func, updated_source); successfully_changed = true; }; } function Noop() {} function WrapInCatcher(f, holder) { return function() { delete holder[0]; try { f(); } catch (e) { if (e.startsWith('LiveEdit failed')) { holder[0] = e; } else { throw e; } } }; } function WrapInNativeCall(f) { return function() { return %Call(f, undefined); }; } function ExecuteInDebugContext(f) { var result; var exception = null; Debug.setListener(function(event) { if (event == Debug.DebugEvent.Break) { try { result = f(); } catch (e) { // Rethrow this exception later. exception = e; } } }); debugger; Debug.setListener(null); if (exception !== null) throw exception; return result; } function WrapInDebuggerCall(f) { return function() { return ExecuteInDebugContext(f); }; } 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 C++ frame above ChooseAnimal frame"); exception_holder = {}; assertEquals("Cat", test.ChooseAnimal(WrapInNativeCall(WrapInDebuggerCall(WrapInCatcher(test.ScriptChanger, exception_holder))))); assertTrue(!!exception_holder[0]);