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
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8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
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11//       with the distribution.
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13//       contributors may be used to endorse or promote products derived
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15//
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17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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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(expected_final_state) {
57  var listener_exception = null;
58  var state_snapshot;
59  var listener_state;
60  var bp;
61
62  function listener(event, exec_state, event_data, data) {
63    print("Here ("+event+"/"+listener_state+"): " +
64        exec_state.frame(0).sourceLineText());
65    try {
66      if (event == Debug.DebugEvent.Break) {
67        if (listener_state == 0) {
68          Debug.clearBreakPoint(bp);
69          exec_state.prepareStep(Debug.StepAction.StepNext);
70          listener_state = 1;
71        } else if (listener_state == 1) {
72          state_snapshot = String(state);
73          print("State: " + state_snapshot);
74          Debug.setListener(null);
75          listener_state = 2;
76        }
77      }
78    } catch (e) {
79      listener_exception = e;
80    }
81  }
82
83
84  // Add the debug event listener.
85  listener_state = 0;
86  Debug.setListener(listener);
87  bp = Debug.setBreakPoint(f, 1);
88
89  h();
90  Debug.setListener(null);
91  if (listener_exception !== null) {
92    print("Exception caught: " + listener_exception);
93    assertUnreachable();
94  }
95
96  assertEquals(expected_final_state, state_snapshot);
97}
98
99
100// Warm-up -- make sure all is compiled and ready for breakpoint.
101h();
102
103TestCase("0,0,-1");
104