Added the 'references' command to the debugger protocol to provide access to ...

src/debug-delay.js

 // Copyright 2006-2008 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 1060 matching lines @@
       } else if (request.command == 'clearbreakpoint') {
         this.clearBreakPointRequest_(request, response);
       } else if (request.command == 'backtrace') {
         this.backtraceRequest_(request, response);
       } else if (request.command == 'frame') {
         this.frameRequest_(request, response);
       } else if (request.command == 'evaluate') {
         this.evaluateRequest_(request, response);
       } else if (request.command == 'lookup') {
         this.lookupRequest_(request, response);
+      } else if (request.command == 'references') {
+        this.referencesRequest_(request, response);
       } else if (request.command == 'source') {
         this.sourceRequest_(request, response);
       } else if (request.command == 'scripts') {
         this.scriptsRequest_(request, response);
       } else {
         throw new Error('Unknown command "' + request.command + '" in request');
       }
     } catch (e) {
       // If there is no response object created one (without command).
       if (!response) {
@@ skipping 363 matching lines @@
   // Lookup handle.
   var mirror = LookupMirror(handle);
   if (mirror) {
     response.body = mirror;
   } else {
     return response.failed('Object #' + handle + '# not found');
   }
 };
 
 
+DebugCommandProcessor.prototype.referencesRequest_ =
+    function(request, response) {
+  if (!request.arguments) {
+    return response.failed('Missing arguments');
+  }
+
+  // Pull out arguments.
+  var type = request.arguments.type;
+  var handle = request.arguments.handle;
+
+  // Check for legal arguments.
+  if (IS_UNDEFINED(type)) {
+    return response.failed('Argument "type" missing');
+  }
+  if (IS_UNDEFINED(handle)) {
+    return response.failed('Argument "handle" missing');
+  }
+  if (type != 'referencedBy' && type != 'constructedBy') {
+    return response.failed('Invalid type "' + type + '"');
+  }
+
+  // Lookup handle and return objects with references the object.
+  var mirror = LookupMirror(handle);
+  if (mirror) {
+    if (type == 'referencedBy') {
+      response.body = mirror.referencedBy();
+    } else {
+      response.body = mirror.constructedBy();
+    }
+  } else {
+    return response.failed('Object #' + handle + '# not found');
+  }
+};
+
+
 DebugCommandProcessor.prototype.sourceRequest_ = function(request, response) {
   // No frames no source.
   if (this.exec_state_.frameCount() == 0) {
     return response.failed('No source');
   }
 
   var from_line;
   var to_line;
   var frame = this.exec_state_.frame();
   if (request.arguments) {
@@ skipping 198 matching lines @@
       json += NumberToJSON_(elem);
     } else if (IS_STRING(elem)) {
       json += StringToJSON_(elem);
     } else {
       json += elem;
     }
   }
   json += ']';
   return json;
 }