| // Copyright 2016 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --expose-debug-as debug --harmony-tailcalls |
| |
| "use strict"; |
| |
| var Debug = debug.Debug |
| var exception = null; |
| var breaks = 0; |
| |
| function f(x) { |
| if (x > 0) { // B3 B5 B7 B9 |
| return f(x - 1); // B4 B6 B8 |
| } |
| } // B10 |
| |
| function g(x) { |
| return f(x); // B2 |
| } |
| |
| function h(x) { |
| debugger; // B0 |
| g(x); // B1 |
| } // B11 |
| |
| |
| function listener(event, exec_state, event_data, data) { |
| if (event != Debug.DebugEvent.Break) return; |
| try { |
| print(event_data.sourceLineText()); |
| assertTrue(event_data.sourceLineText().indexOf(`B${breaks++}`) > 0); |
| exec_state.prepareStep(Debug.StepAction.StepIn); |
| } catch (e) { |
| exception = e; |
| }; |
| }; |
| |
| Debug.setListener(listener); |
| |
| h(3); |
| |
| Debug.setListener(null); // B12 |
| assertNull(exception); |
| assertEquals(13, breaks); |