text: // Copyright 2009 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
  
  var exception = false;  // Exception in debug event listener.
  var before_compile_count = 0;
  var after_compile_count = 0;
  var current_source = '';  // Current source being compiled.
  var source_count = 0;  // Total number of scources compiled.
  var host_compilations = 0;  // Number of scources compiled through the API.
  var eval_compilations = 0;  // Number of scources compiled through eval.
  var json_compilations = 0;  // Number of scources compiled through JSON.parse.
  
  
  function compileSource(source) {
    current_source = source;
    eval(current_source);
    source_count++;
  }
  
  
  function listener(event, exec_state, event_data, data) {
    try {
      if (event == Debug.DebugEvent.BeforeCompile ||
          event == Debug.DebugEvent.AfterCompile) {
        // Count the events.
        if (event == Debug.DebugEvent.BeforeCompile) {
          before_compile_count++;
        } else {
          after_compile_count++;
          switch (event_data.script().compilationType()) {
            case Debug.ScriptCompilationType.Host:
              host_compilations++;
              break;
            case Debug.ScriptCompilationType.Eval:
              eval_compilations++;
              break;
            case Debug.ScriptCompilationType.JSON:
              json_compilations++;
              break;
          }
        }
  
        // If the compiled source contains 'eval' there will be additional compile
        // events for the source inside eval.
        if (current_source.indexOf('eval') == 0) {
          // For source with 'eval' there will be compile events with substrings
          // as well as with with the exact source.
          assertTrue(current_source.indexOf(event_data.script().source()) >= 0);
        } else if (current_source.indexOf('JSON.parse') == 0) {
          // For JSON the JSON source will be in parentheses.
          var s = event_data.script().source();
          if (s[0] == '(') {
            s = s.substring(1, s.length - 2);
          }
          assertTrue(current_source.indexOf(s) >= 0);
        } else {
          // For source without 'eval' there will be a compile events with the
          // exact source.
          assertEquals(current_source, event_data.script().source());
        }
        // Check that script context is included into the event message.
        var json = event_data.toJSONProtocol();
        var msg = eval('(' + json + ')');
        assertTrue('context' in msg.body.script);
  
        // Check that we pick script name from //@ sourceURL, iff present
        assertEquals(current_source.indexOf('sourceURL') >= 0 ? 
                       'myscript.js' : undefined,
                     event_data.script().name());
      }
    } catch (e) {
      exception = e
    }
  };
  
  
  // Add the debug event listener.
  Debug.setListener(listener);
  
  // Compile different sources.
  compileSource('a=1');
  compileSource('(function(){})');
  compileSource('eval("a=2")');
  source_count++;  // Using eval causes additional compilation event.
  compileSource('eval("eval(\'(function(){return a;})\')")');
  source_count += 2;  // Using eval causes additional compilation event.
  compileSource('JSON.parse(\'{"a":1,"b":2}\')');
  source_count++;  // Using JSON.parse causes additional compilation event.
  compileSource('x=1; //@ sourceURL=myscript.js');
  
  // Make sure that the debug event listener was invoked.
  assertFalse(exception, "exception in listener")
  
  // Number of before and after compile events should be the same.
  assertEquals(before_compile_count, after_compile_count);
  
  // Check the actual number of events (no compilation through the API as all
  // source compiled through eval except for one JSON.parse call).
  assertEquals(source_count, after_compile_count);
  assertEquals(0, host_compilations);
  assertEquals(source_count - 1, eval_compilations);
  assertEquals(1, json_compilations);
  
  Debug.setListener(null);
  