text: // 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
  
  // Tests how debugger can step over not necessarily in the top frame.
  
  // 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] < 3; state[2]++) {
      void String(a);
    }
  }
  function g() {
    for (state[1] = 0; state[1] < 3; state[1]++) {
      f();
    }
  }
  function h() {
    state = [-1, -1, -1];
    for (state[0] = 0; state[0] < 3; state[0]++) {
      g();
    }
  }
  
  function TestCase(frame_index, step_count, expected_final_state) {
    print("Test case, parameters " + frame_index + "/" + step_count);
  
    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);
            }
            exec_state.prepareStep(Debug.StepAction.StepNext,
                step_count, context_frame);
            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();
  
  
  // 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, "0,0,3");
  TestCase(1, 3, "0,1,3");
  TestCase(1, 7, "0,3,3");
  
  // Stepping in the frame #2.
  TestCase(2, 3, "1,3,3");
  TestCase(2, 7, "3,3,3");
  