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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// Simple debug event handler which first time hit will perform 1000 steps and
33// second time hit will evaluate and store the value of "i". If requires that
34// the global property "state" is initially zero.
35
36var bp1, bp2;
37
38function listener(event, exec_state, event_data, data) {
39  if (event == Debug.DebugEvent.Break) {
40    if (step_count > 0) {
41      exec_state.prepareStep(Debug.StepAction.StepIn);
42      step_count--;
43    } else {
44      result = exec_state.frame().evaluate("i").value();
45      // Clear the break point on line 2 if set.
46      if (bp2) {
47        Debug.clearBreakPoint(bp2);
48      }
49    }
50  }
51};
52
53// Add the debug event listener.
54Debug.setListener(listener);
55
56// Test debug event for break point.
57function f() {
58  var i;                        // Line 1.
59  for (i = 0; i < 1000; i++) {  // Line 2.
60    x = 1;                      // Line 3.
61  }
62};
63
64// Set a breakpoint on the for statement (line 1).
65bp1 = Debug.setBreakPoint(f, 1);
66
67// Check that performing 1000 steps will make i 499.
68var step_count = 1000;
69result = -1;
70f();
71assertEquals(332, result);
72Debug.setListener(null);
73