1// Copyright 2016 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 --harmony-tailcalls
6
7"use strict";
8
9var Debug = debug.Debug
10var exception = null;
11var breaks = 0;
12
13function f(x) {
14  if (x > 0) {            // B3 B5 B7 B9
15    return f(x - 1);      // B4 B6 B8
16  }
17}                         // B10
18
19function g(x) {
20  return f(x);            // B2
21}
22
23function h(x) {
24  debugger;               // B0
25  g(x);                   // B1
26}                         // B11
27
28
29function listener(event, exec_state, event_data, data) {
30  if (event != Debug.DebugEvent.Break) return;
31  try {
32    print(event_data.sourceLineText());
33    assertTrue(event_data.sourceLineText().indexOf(`B${breaks++}`) > 0);
34    exec_state.prepareStep(Debug.StepAction.StepIn);
35  } catch (e) {
36    exception = e;
37  };
38};
39
40Debug.setListener(listener);
41
42h(3);
43
44Debug.setListener(null);  // B12
45assertNull(exception);
46assertEquals(13, breaks);
47