Add a second kind of HandleScope that ties the lifetime of Handles created in its scope to the life…

src/handles.h

 // Copyright 2011 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 143 matching lines @@
   static internal::Object** Extend();
 
   // Zaps the handles in the half-open interval [start, end).
   static void ZapRange(internal::Object** start, internal::Object** end);
 
   friend class v8::HandleScope;
   friend class v8::ImplementationUtilities;
 };
 
 
+class CompilationInfo;
+
+// Like a regular stack-allocated HandleScope, but does not delete the
+// handles allocated in its scope on destruction.  Instead, it ties
+// the Handles created in its scope with the CompilatationInfo passed
+// to its constructor.  The Handles are reclaimed when the
+// CompilationInfo destructs.
+class GatheringHandleScope {
+ public:
+  explicit GatheringHandleScope(CompilationInfo* info);
+  ~GatheringHandleScope();
+
+ private:
+  CompilationInfo* info_;
+  Object** prev_next_;
+  Object** prev_limit_;
+};
+
+
 // ----------------------------------------------------------------------------
 // Handle operations.
 // They might invoke garbage collection. The result is an handle to
 // an object of expected type, or the handle is an error if running out
 // of space or encountering an internal error.
 
 // Flattens a string.
 void FlattenString(Handle<String> str);
 
 // Flattens a string and returns the underlying external or sequential
@@ skipping 119 matching lines @@
   inline NoHandleAllocation();
   inline ~NoHandleAllocation();
  private:
   int level_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_H_