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.
  
  // The functions used for testing backtraces. They are at the top to make the
  // testing of source line/column easier.
  function f(x, y) {
    a=1;
  };
  
  var m = (0, function() {
    new f(1);
  });
  
  function g() {
    m();
  };
  
  
  Debug = debug.Debug
  
  listenerCalled = false;
  exception = false;
  
  function listener(event, exec_state, event_data, data) {
    try {
      if (event == Debug.DebugEvent.Break) {
        // The expected backtrace is
        // 0: f
        // 1: m
        // 2: g
        // 3: [anonymous]
        assertEquals(4, exec_state.frameCount());
  
        var frame0 = exec_state.frame(0);
        assertEquals("f", frame0.func().name());
        assertEquals(0, frame0.index());
        assertEquals(31, frame0.sourceLine());
        assertEquals(2, frame0.sourceColumn());
        assertEquals(2, frame0.localCount());
        assertEquals("x", frame0.localName(0));
        assertEquals(1, frame0.localValue(0).value());
        assertEquals("y", frame0.localName(1));
        assertEquals(undefined, frame0.localValue(1).value());
  
        var frame1 = exec_state.frame(1);
        assertEquals("m", frame1.func().name());
        assertEquals(1, frame1.index());
        assertEquals(35, frame1.sourceLine());
        assertEquals(2, frame1.sourceColumn());
        assertEquals(0, frame1.localCount());
  
        var frame2 = exec_state.frame(2);
        assertEquals("g", frame2.func().name());
  
        var frame3 = exec_state.frame(3);
        assertEquals("", frame3.func().name());
  
        listenerCalled = true;
      }
    } catch (e) {
      exception = e;
    };
  };
  
  // Add the debug event listener.
  Debug.setListener(listener);
  
  // Set a break point and call to invoke the debug event listener.
  Debug.setBreakPoint(f, 0, 0);
  g();
  
  // Make sure that the debug event listener vas invoked.
  assertFalse(exception, "exception in listener");
  assertTrue(listenerCalled);
  