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
5// Flags: --expose-debug-as debug
6
7var Debug = debug.Debug;
8
9function assertIteratorResult(value, done, result) {
10  assertEquals({value: value, done: done}, result);
11}
12
13function 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
28  // Add a breakpoint on line 3 (the second yield).
29  var bp = Debug.setBreakPoint(gen, 3);
30
31  // Enable the debugger, which should force recompilation of the generator
32  // function and relocation of the suspended generator activation.
33  Debug.setListener(listener);
34
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
46function prog(a, b, c) {
47  return a + ';\n' + 'yield ' + b + ';\n' + 'yield ' + c;
48}
49
50// Simple empty local scope.
51RunTest([prog('', '1', '2')], [], 1, 2);
52
53RunTest([prog('for (;;) break', '1', '2')], [], 1, 2);
54
55RunTest([prog('while (0) foo()', '1', '2')], [], 1, 2);
56
57RunTest(['a', prog('var x = 3', 'a', 'x')], [1], 1, 3);
58
59RunTest(['a', prog('', '1', '2')], [42], 1, 2);
60
61RunTest(['a', prog('for (;;) break', '1', '2')], [42], 1, 2);
62