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 --debug-eval-readonly-locals
6
7Debug = debug.Debug
8
9var debug_step = 0;
10var failure = null;
11
12function listener(event, exec_state, event_data, data) {
13  if (event != Debug.DebugEvent.Break) return;
14  try {
15    if (debug_step == 0) {
16      assertEquals(1, exec_state.frame(0).evaluate('a').value());
17      assertEquals(3, exec_state.frame(0).evaluate('b').value());
18      exec_state.frame(0).evaluate("a = 4").value();  // no effect.
19      debug_step++;
20    } else {
21      assertEquals(1, exec_state.frame(0).evaluate('a').value());
22      assertEquals(3, exec_state.frame(0).evaluate('b').value());
23      exec_state.frame(0).evaluate("set_a_to_5()");
24      exec_state.frame(0).evaluate("b = 5").value();  // no effect.
25    }
26  } catch (e) {
27    failure = e;
28  }
29}
30
31Debug.setListener(listener);
32
33function* generator(a, b) {
34  function set_a_to_5() { a = 5 }
35  var b = 3;  // Shadows a parameter.
36  debugger;
37  yield a;
38  yield b;
39  debugger;
40  yield a;
41  return b;
42}
43
44var foo = generator(1, 2);
45
46assertEquals(1, foo.next().value);
47assertEquals(3, foo.next().value);
48assertEquals(5, foo.next().value);
49assertEquals(3, foo.next().value);
50assertNull(failure);
51
52Debug.setListener(null);
53