1// Copyright 2008 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
32// Tests how debugger can step over not necessarily in the top frame.
33
34// Simple 3 functions, that protocol their execution state in global
35// variable state.
36var state;
37
38function f() {
39  var a = 1978;
40  for (state[2] = 0; state[2] < 3; state[2]++) {
41    void String(a);
42  }
43}
44function g() {
45  for (state[1] = 0; state[1] < 3; state[1]++) {
46    f();
47  }
48}
49function h() {
50  state = [-1, -1, -1];
51  for (state[0] = 0; state[0] < 3; state[0]++) {
52    g();
53  }
54}
55
56function TestCase(frame_index, step_count, expected_final_state) {
57  print("Test case, parameters " + frame_index + "/" + step_count);
58
59  var listener_exception = null;
60  var state_snapshot;
61  var listener_state;
62  var bp;
63
64  function listener(event, exec_state, event_data, data) {
65    print("Here ("+event+"/"+listener_state+"): " +
66        exec_state.frame(0).sourceLineText());
67    try {
68      if (event == Debug.DebugEvent.Break) {
69        if (listener_state == 0) {
70          Debug.clearBreakPoint(bp);
71          var context_frame;
72          if (frame_index !== undefined) {
73            context_frame = exec_state.frame(frame_index);
74          }
75          exec_state.prepareStep(Debug.StepAction.StepNext,
76              step_count, context_frame);
77          listener_state = 1;
78        } else if (listener_state == 1) {
79          state_snapshot = String(state);
80          print("State: " + state_snapshot);
81          Debug.setListener(null);
82          listener_state = 2;
83        }
84      }
85    } catch (e) {
86      listener_exception = e;
87    }
88  }
89
90
91  // Add the debug event listener.
92  listener_state = 0;
93  Debug.setListener(listener);
94  bp = Debug.setBreakPoint(f, 1);
95
96  h();
97  Debug.setListener(null);
98  if (listener_exception !== null) {
99    print("Exception caught: " + listener_exception);
100    assertUnreachable();
101  }
102
103  assertEquals(expected_final_state, state_snapshot);
104}
105
106
107// Warm-up -- make sure all is compiled and ready for breakpoint.
108h();
109
110
111// Stepping in the default (top) frame.
112TestCase(undefined, 0, "0,0,-1");
113TestCase(undefined, 1, "0,0,-1");
114TestCase(undefined, 2, "0,0,0");
115TestCase(undefined, 5, "0,0,1");
116TestCase(undefined, 8, "0,0,3");
117
118// Stepping in the frame #0 (should be exactly the same as above).
119TestCase(0, 0, "0,0,-1");
120TestCase(0, 1, "0,0,-1");
121TestCase(0, 2, "0,0,0");
122TestCase(0, 5, "0,0,1");
123TestCase(0, 8, "0,0,3");
124
125// Stepping in the frame #1.
126TestCase(1, 0, "0,0,3");
127TestCase(1, 3, "0,1,3");
128TestCase(1, 7, "0,3,3");
129
130// Stepping in the frame #2.
131TestCase(2, 3, "1,3,3");
132TestCase(2, 7, "3,3,3");
133