add ETW for V8 symbols

include/v8.h

 // Copyright 2012 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 2937 matching lines @@
  * Interface for iterating though all external resources in the heap.
  */
 class V8EXPORT ExternalResourceVisitor {  // NOLINT
  public:
   virtual ~ExternalResourceVisitor() {}
   virtual void VisitExternalString(Handle<String> string) {}
 };
 
 
 /**
+ * CodeAddressEvent is used as a callback function for external logging
+ * of symbols to address.
+ */
+enum CodeAddressOperation {
+  Add = 1,
+  Move,
+  Remove,
+  Reset,
+  Source
+};
+
+typedef bool (*CodeAddressEvent)(CodeAddressOperation operation,
+                                 const void* addr1,
+                                 int len,
+                                 const char* symbol,
+                                 int tag,
+                                 const void* addr2,
+                                 int line);
+
+
+/**
  * Container class for static utility functions.
  */
 class V8EXPORT V8 {
  public:
   /** Set the callback to invoke in case of fatal errors. */
   static void SetFatalErrorHandler(FatalErrorCallback that);
 
   /**
    * Set the callback to invoke to check if code generation from
    * strings should be allowed.
@@ skipping 391 matching lines @@
   static void LowMemoryNotification();
 
   /**
    * Optional notification that a context has been disposed. V8 uses
    * these notifications to guide the GC heuristic. Returns the number
    * of context disposals - including this one - since the last time
    * V8 had a chance to clean up.
    */
   static int ContextDisposedNotification();
 
+  /**
+   * This function sets or removes callback to get code address locations.
+   * Set enumExisting flag to true to enumerate existing code addresses.
+   */
+  static void SetCodeAddressEventCallback(CodeAddressEvent callback,
+      bool enumExisting);
+
  private:
   V8();
 
   static internal::Object** GlobalizeReference(internal::Object** handle);
   static void DisposeGlobal(internal::Object** global_handle);
   static void MakeWeak(internal::Object** global_handle,
                        void* data,
                        WeakReferenceCallback);
   static void ClearWeak(internal::Object** global_handle);
   static void MarkIndependent(internal::Object** global_handle);
@@ skipping 1157 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_