Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [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 | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5 | // Flags: --expose-debug-as debug --ignition-generators |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 6 | |
| 7 | var Debug = debug.Debug; |
| 8 | |
| 9 | function assertIteratorResult(value, done, result) { |
| 10 | assertEquals({value: value, done: done}, result); |
| 11 | } |
| 12 | |
| 13 | function RunTest(formals_and_body, args, value1, value2) { |
| 14 | // A null listener. It isn't important what the listener does. |
| 15 | function listener(event, exec_state, event_data, data) { |
| 16 | } |
| 17 | |
| 18 | // Create the generator function outside a debugging context. It will probably |
| 19 | // be lazily compiled. |
| 20 | var gen = (function*(){}).constructor.apply(null, formals_and_body); |
| 21 | |
| 22 | // Instantiate the generator object. |
| 23 | var obj = gen.apply(null, args); |
| 24 | |
| 25 | // Advance to the first yield. |
| 26 | assertIteratorResult(value1, false, obj.next()); |
| 27 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 28 | // Enable the debugger, which should force recompilation of the generator |
| 29 | // function and relocation of the suspended generator activation. |
| 30 | Debug.setListener(listener); |
| 31 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 32 | // Add a breakpoint on line 3 (the second yield). |
| 33 | var bp = Debug.setBreakPoint(gen, 3); |
| 34 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 35 | // Check that the generator resumes and suspends properly. |
| 36 | assertIteratorResult(value2, false, obj.next()); |
| 37 | |
| 38 | // Disable debugger -- should not force recompilation. |
| 39 | Debug.clearBreakPoint(bp); |
| 40 | Debug.setListener(null); |
| 41 | |
| 42 | // Run to completion. |
| 43 | assertIteratorResult(undefined, true, obj.next()); |
| 44 | } |
| 45 | |
| 46 | function prog(a, b, c) { |
| 47 | return a + ';\n' + 'yield ' + b + ';\n' + 'yield ' + c; |
| 48 | } |
| 49 | |
| 50 | // Simple empty local scope. |
| 51 | RunTest([prog('', '1', '2')], [], 1, 2); |
| 52 | |
| 53 | RunTest([prog('for (;;) break', '1', '2')], [], 1, 2); |
| 54 | |
| 55 | RunTest([prog('while (0) foo()', '1', '2')], [], 1, 2); |
| 56 | |
| 57 | RunTest(['a', prog('var x = 3', 'a', 'x')], [1], 1, 3); |
| 58 | |
| 59 | RunTest(['a', prog('', '1', '2')], [42], 1, 2); |
| 60 | |
| 61 | RunTest(['a', prog('for (;;) break', '1', '2')], [42], 1, 2); |