Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | // Flags: --expose-debug-as debug --turbo-filter=g --allow-natives-syntax |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 6 | |
| 7 | // Test that Debug::PrepareForBreakPoints can deal with turbofan code (g) |
| 8 | // on the stack. Without deoptimization support, we will not be able to |
| 9 | // replace optimized code for g by unoptimized code with debug break slots. |
| 10 | // This would cause stepping to fail (V8 issue 3660). |
| 11 | |
| 12 | function f(x) { |
| 13 | g(x); |
| 14 | var a = 0; // Break 6 |
| 15 | return a; // Break 7 |
| 16 | } // Break 8 |
| 17 | |
| 18 | function g(x) { |
| 19 | if (x) h(); |
| 20 | var a = 0; // Break 2 |
| 21 | var b = 1; // Break 3 |
| 22 | return a + b; // Break 4 |
| 23 | } // Break 5 |
| 24 | |
| 25 | function h() { |
| 26 | debugger; // Break 0 |
| 27 | } // Break 1 |
| 28 | |
| 29 | Debug = debug.Debug; |
| 30 | var exception = null; |
| 31 | var break_count = 0; |
| 32 | |
| 33 | function listener(event, exec_state, event_data, data) { |
| 34 | if (event != Debug.DebugEvent.Break) return; |
| 35 | try { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 36 | exec_state.prepareStep(Debug.StepAction.StepNext); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 37 | print(exec_state.frame(0).sourceLineText()); |
| 38 | var match = exec_state.frame(0).sourceLineText().match(/Break (\d)/); |
| 39 | assertNotNull(match); |
| 40 | assertEquals(break_count++, parseInt(match[1])); |
| 41 | } catch (e) { |
| 42 | print(e + e.stack); |
| 43 | exception = e; |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | f(0); |
| 48 | f(0); |
| 49 | %OptimizeFunctionOnNextCall(g); |
| 50 | |
| 51 | Debug.setListener(listener); |
| 52 | |
| 53 | f(1); |
| 54 | |
| 55 | Debug.setListener(null); // Break 9 |
| 56 | assertNull(exception); |
| 57 | assertEquals(10, break_count); |