debug-step-4-in-frame.js 4.14 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

32
// Tests how debugger can step over not necessarily in the top frame.
33 34 35 36 37 38 39 40 41 42 43 44 45

// Simple 3 functions, that protocol their execution state in global
// variable state.
var state;

function f() {
  var a = 1978;
  for (state[2] = 0; state[2] < 5; state[2]++) {
    void String(a);
  }
}
function g() {
  for (state[1] = 0; state[1] < 5; state[1]++) {
46
    f();
47 48 49
  }
}
function h() {
50
  state = [-1, -1, -1];
51 52 53 54 55
  for (state[0] = 0; state[0] < 5; state[0]++) {
    g();
  }
}

56 57
function TestCase(frame_index, step_count, expected_final_state) {
  print("Test case, parameters " + frame_index + "/" + step_count);
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

  var listener_exception = null;
  var state_snapshot;
  var listener_state;
  var bp;

  function listener(event, exec_state, event_data, data) {
    print("Here ("+event+"/"+listener_state+"): " +
        exec_state.frame(0).sourceLineText());
    try {
      if (event == Debug.DebugEvent.Break) {
        if (listener_state == 0) {
          Debug.clearBreakPoint(bp);
          var context_frame;
          if (frame_index !== undefined) {
            context_frame = exec_state.frame(frame_index);
          }
75 76
          exec_state.prepareStep(Debug.StepAction.StepNext,
              step_count, context_frame);
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
          listener_state = 1;
        } else if (listener_state == 1) {
          state_snapshot = String(state);
          print("State: " + state_snapshot);
          Debug.setListener(null);
          listener_state = 2;
        }
      }
    } catch (e) {
      listener_exception = e;
    }
  }


  // Add the debug event listener.
  listener_state = 0;
  Debug.setListener(listener);
  bp = Debug.setBreakPoint(f, 1);

  h();
  Debug.setListener(null);
  if (listener_exception !== null) {
    print("Exception caught: " + listener_exception);
    assertUnreachable();
  }

  assertEquals(expected_final_state, state_snapshot);
}


// Warm-up -- make sure all is compiled and ready for breakpoint.
h();


111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
// Stepping in the default (top) frame.
TestCase(undefined, 0, "0,0,-1");
TestCase(undefined, 1, "0,0,-1");
TestCase(undefined, 2, "0,0,0");
TestCase(undefined, 5, "0,0,1");
TestCase(undefined, 8, "0,0,3");

// Stepping in the frame #0 (should be exactly the same as above).
TestCase(0, 0, "0,0,-1");
TestCase(0, 1, "0,0,-1");
TestCase(0, 2, "0,0,0");
TestCase(0, 5, "0,0,1");
TestCase(0, 8, "0,0,3");

// Stepping in the frame #1.
TestCase(1, 0, "0,0,5");
TestCase(1, 3, "0,1,5");
TestCase(1, 8, "0,4,5");

// Stepping in the frame #2.
TestCase(2, 3, "1,5,5");
TestCase(2, 8, "4,5,5");