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 | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5 | // Flags: --expose-debug-as debug |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 6 | |
| 7 | Debug = debug.Debug; |
| 8 | |
| 9 | var step = 0; |
| 10 | var exception = null; |
| 11 | |
| 12 | function listener(event, exec_state, event_data, data) { |
| 13 | if (event != Debug.DebugEvent.Break) return; |
| 14 | try { |
| 15 | if (step == 0) { |
| 16 | assertEquals("error", exec_state.frame(0).evaluate("e").value()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 17 | exec_state.frame(0).evaluate("write_0('foo')"); |
| 18 | exec_state.frame(0).evaluate("write_1('modified')"); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 19 | } else { |
| 20 | assertEquals("argument", exec_state.frame(0).evaluate("e").value()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 21 | exec_state.frame(0).evaluate("write_2('bar')"); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 22 | } |
| 23 | step++; |
| 24 | } catch (e) { |
| 25 | print(e + e.stack); |
| 26 | exception = e; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | Debug.setListener(listener); |
| 31 | |
| 32 | function f(e, x) { |
| 33 | try { |
| 34 | throw "error"; |
| 35 | } catch(e) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 36 | // In ES2015 hoisting semantics, 'x' binds to the argument |
| 37 | // and 'e' binds to the exception. |
| 38 | function write_0(v) { e = v } |
| 39 | function write_1(v) { x = v } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 40 | debugger; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 41 | assertEquals("foo", e); // overwritten by the debugger |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 42 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | assertEquals("argument", e); // debugger did not overwrite |
| 44 | function write_2(v) { e = v } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 45 | debugger; |
| 46 | assertEquals("bar", e); |
| 47 | assertEquals("modified", x); |
| 48 | } |
| 49 | |
| 50 | f("argument") |
| 51 | assertNull(exception); |
| 52 | assertEquals(2, step); |