Better handling debug evaluation when there is no JavaScript stack

src/d8.js

 // 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
@@ skipping 363 matching lines @@
     // Build a lookup request.
     var request = this.createRequest('lookup');
     request.arguments = {};
     request.arguments.handle = parseInt(handle_match[1]);
     return request.toJSONProtocol();
   } else {
     // Build an evaluate request.
     var request = this.createRequest('evaluate');
     request.arguments = {};
     request.arguments.expression = expression;
+    // Request a global evaluation if there is no current frame.
+    if (Debug.State.currentFrame == kNoFrame) {
+      request.arguments.global = true;
+    }
     return request.toJSONProtocol();
   }
 };
 
 
 // Create a JSON request for the references/instances command.
 DebugRequest.prototype.makeReferencesJSONRequest_ = function(handle, type) {
   // Build a references request.
   var handle_match = handle.match(/^#([0-9]*)#$/);
   if (handle_match) {
@@ skipping 394 matching lines @@
       case 'frame':
         details.text = SourceUnderline(body.sourceLineText,
                                        body.column);
         Debug.State.currentSourceLine = body.line;
         Debug.State.currentFrame = body.index;
         break;
         
       case 'evaluate':
       case 'lookup':
         if (last_cmd == 'p' || last_cmd == 'print') {
-          details.text =  body.text;
+          result = body.text;
         } else {
           var value = response.bodyValue();
           if (value.isObject()) {
             result += formatObject_(value, true);
           } else {
             result += 'type: ';
             result += value.type();
             if (!value.isUndefined() && !value.isNull()) {
               result += ', ';
               if (value.isString()) {
@@ skipping 168 matching lines @@
   return this.packet_.command;
 }
 
 
 ProtocolPackage.prototype.body = function() {
   return this.packet_.body;
 }
 
 
 ProtocolPackage.prototype.bodyValue = function(index) {
-  if (IS_UNDEFINED(index)) {
+  if (index) {
+    return new ProtocolValue(this.packet_.body[index], this);
+  } else {
     return new ProtocolValue(this.packet_.body, this);
-  } else {
-    return new ProtocolValue(this.packet_.body[index], this);
   }
 }
 
 
 ProtocolPackage.prototype.body = function() {
   return this.packet_.body;
 }
 
 
 ProtocolPackage.prototype.lookup = function(handle) {
@@ skipping 375 matching lines @@
       json += NumberToJSON_(elem);
     } else if (typeof(elem) === 'string')  {
       json += StringToJSON_(elem);
     } else {
       json += elem;
     }
   }
   json += ']';
   return json;
 }