// 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. Debug = debug.Debug let listener_complete = false; let exceptionThrown = false; let break_count = 0; let expected_return_value = 0; let expected_source_position = []; let debugger_source_position = 0; // Listener which expects to do four steps to reach returning from the function. function listener(event, exec_state, event_data, data) { try { if (event == Debug.DebugEvent.Break) { break_count++; if (break_count < 4) { switch (break_count) { case 1: // Collect the position of the debugger statement. debugger_source_position = exec_state.frame(0).sourcePosition(); break; case 2: // Position now at the if statement. assertEquals(expected_source_position.shift() + debugger_source_position, exec_state.frame(0).sourcePosition()); break; case 3: // Position now at either of the returns. assertEquals(expected_source_position.shift() + debugger_source_position, exec_state.frame(0).sourcePosition()); break; default: fail("Unexpected"); } exec_state.prepareStep(Debug.StepAction.StepIn); } else { // Position at the end of the function. assertEquals(expected_source_position.shift() + debugger_source_position, exec_state.frame(0).sourcePosition()); // Just about to return from the function. assertEquals(expected_return_value, exec_state.frame(0).returnValue().value()); listener_complete = true; } } } catch (e) { exceptionThrown = true; print(e + e.stack) }; }; // Add the debug event listener. Debug.setListener(listener); // Four steps from the debugger statement in this function will position us at // the function return. // 0 1 2 3 4 5 // 0123456789012345678901234567890123456789012345678901 function f(x) {debugger; if (x) { return 1; } else { return 2; } }; // Call f expecting different return values. break_count = 0; expected_return_value = 2; expected_source_position = [10, 38, 47]; listener_complete = false; f(); assertFalse(exceptionThrown, "exception in listener"); assertTrue(listener_complete); assertEquals(4, break_count); break_count = 0; expected_return_value = 1; expected_source_position = [10, 19, 28]; listener_complete = false; f(true); assertFalse(exceptionThrown, "exception in listener"); assertTrue(listener_complete); assertEquals(4, break_count); break_count = 0; expected_return_value = 2; expected_source_position = [10, 38, 47]; listener_complete = false; f(false); assertFalse(exceptionThrown, "exception in listener"); assertTrue(listener_complete); assertEquals(4, break_count);