1// Copyright 2009 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --expose-debug-as debug
29// Get the Debug object exposed from the debug context global object.
30Debug = debug.Debug
31
32var exception = null;
33var state = 0;
34var expected_function_name = null;
35var expected_source_line_text = null;
36var expected_caller_source_line = null;
37var step_in_count = 2;
38
39// Simple debug event handler which first time will cause 'step in' action
40// to get into g.call and than check that execution is pauesed inside
41// function 'g'.
42function listener(event, exec_state, event_data, data) {
43  try {
44    if (event == Debug.DebugEvent.Break) {
45      if (state == 0) {
46        // Step into f().
47        exec_state.prepareStep(Debug.StepAction.StepIn, step_in_count);
48        state = 2;
49      } else if (state == 2) {
50        assertEquals(expected_source_line_text,
51                     event_data.sourceLineText());
52        assertEquals(expected_function_name, event_data.func().name());
53        state = 3;
54      }
55    }
56  } catch(e) {
57    exception = e;
58  }
59};
60
61// Add the debug event listener.
62Debug.setListener(listener);
63
64
65function g() {
66   return "s";  // expected line
67}
68
69function testFunction() {
70  var f = g;
71  var s = 1 +f(10);
72}
73
74function g2() {
75   return "s2";  // expected line
76}
77
78function testFunction2() {
79  var f = g2;
80  var s = 1 +f(10, 20);
81}
82
83// Run three times. First time the function will be compiled lazily,
84// second time cached version will be used.
85for (var i = 0; i < 3; i++) {
86  state = 0;
87  expected_function_name = 'g';
88  expected_source_line_text = '   return "s";  // expected line';
89  step_in_count = 2;
90  // Set a break point and call to invoke the debug event listener.
91  Debug.setBreakPoint(testFunction, 1, 0);
92  testFunction();
93  assertNull(exception);
94  assertEquals(3, state);
95}
96
97// Test stepping into function call when a breakpoint is set at the place
98// of call. Use different pair of functions so that g2 is compiled lazily.
99// Run twice: first time function will be compiled lazily, second time
100// cached version will be used.
101for (var i = 0; i < 3; i++) {
102  state = 0;
103  expected_function_name = 'g2';
104  expected_source_line_text = '   return "s2";  // expected line';
105  step_in_count = 1;
106  // Set a break point and call to invoke the debug event listener.
107  Debug.setBreakPoint(testFunction2, 2, 0);
108  testFunction2();
109  assertNull(exception);
110  assertEquals(3, state);
111}
112
113
114// Get rid of the debug event listener.
115Debug.setListener(null);
116