Keep natives source code in external strings instead of putting...

src/objects.h

 // Copyright 2006-2009 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
@@ skipping 772 matching lines @@
 // Since Smi and Failure are subclasses of Object no
 // data members can be present in Object.
 class Object BASE_EMBEDDED {
  public:
   // Type testing.
   inline bool IsSmi();
   inline bool IsHeapObject();
   inline bool IsHeapNumber();
   inline bool IsString();
   inline bool IsSymbol();
-#ifdef DEBUG
   // See objects-inl.h for more details
   inline bool IsSeqString();
   inline bool IsSlicedString();
   inline bool IsExternalString();
   inline bool IsExternalTwoByteString();
   inline bool IsExternalAsciiString();
   inline bool IsSeqTwoByteString();
   inline bool IsSeqAsciiString();
-#endif  // DEBUG
   inline bool IsConsString();
 
   inline bool IsNumber();
   inline bool IsByteArray();
   inline bool IsPixelArray();
   inline bool IsExternalArray();
   inline bool IsExternalByteArray();
   inline bool IsExternalUnsignedByteArray();
   inline bool IsExternalShortArray();
   inline bool IsExternalUnsignedShortArray();
@@ skipping 3618 matching lines @@
   // The underlying resource.
   inline Resource* resource();
   inline void set_resource(Resource* buffer);
 
   // Dispatched behavior.
   uint16_t ExternalAsciiStringGet(int index);
 
   // Casting.
   static inline ExternalAsciiString* cast(Object* obj);
 
+  // Garbage collection support.
+  void ExternalAsciiStringIterateBody(ObjectVisitor* v);
+
   // Support for StringInputBuffer.
   const unibrow::byte* ExternalAsciiStringReadBlock(unsigned* remaining,
                                                     unsigned* offset,
                                                     unsigned chars);
   inline void ExternalAsciiStringReadBlockIntoBuffer(ReadBlockBuffer* buffer,
                                                      unsigned* offset,
                                                      unsigned chars);
 
   // Identify the map for the external string/symbol with a particular length.
   static inline Map* StringMap(int length);
@@ skipping 15 matching lines @@
 
   // Dispatched behavior.
   uint16_t ExternalTwoByteStringGet(int index);
 
   // For regexp code.
   const uint16_t* ExternalTwoByteStringGetData(unsigned start);
 
   // Casting.
   static inline ExternalTwoByteString* cast(Object* obj);
 
+  // Garbage collection support.
+  void ExternalTwoByteStringIterateBody(ObjectVisitor* v);
+
   // Support for StringInputBuffer.
   void ExternalTwoByteStringReadBlockIntoBuffer(ReadBlockBuffer* buffer,
                                                 unsigned* offset_ptr,
                                                 unsigned chars);
 
   // Identify the map for the external string/symbol with a particular length.
   static inline Map* StringMap(int length);
   static inline Map* SymbolMap(int length);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalTwoByteString);
@@ skipping 611 matching lines @@
 
   // To allow lazy clearing of inline caches the visitor has
   // a rich interface for iterating over Code objects..
 
   // Visits a code target in the instruction stream.
   virtual void VisitCodeTarget(RelocInfo* rinfo);
 
   // Visits a runtime entry in the instruction stream.
   virtual void VisitRuntimeEntry(RelocInfo* rinfo) {}
 
+  // Visits the resource of an ASCII or two-byte string.
+  virtual void VisitExternalAsciiString(
+      v8::String::ExternalAsciiStringResource** resource) {}
+  virtual void VisitExternalTwoByteString(
+      v8::String::ExternalStringResource** resource) {}
+
   // Visits a debug call target in the instruction stream.
   virtual void VisitDebugTarget(RelocInfo* rinfo);
 
   // Handy shorthand for visiting a single pointer.
   virtual void VisitPointer(Object** p) { VisitPointers(p, p + 1); }
 
   // Visits a contiguous arrays of external references (references to the C++
   // heap) in the half-open range [start, end). Any or all of the values
   // may be modified on return.
   virtual void VisitExternalReferences(Address* start, Address* end) {}
@@ skipping 34 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_