Change code pointer in function objects to a pointer to the first...

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 2869 matching lines @@
   static inline InlineCacheState ExtractICStateFromFlags(Flags flags);
   static inline InLoopFlag ExtractICInLoopFromFlags(Flags flags);
   static inline PropertyType ExtractTypeFromFlags(Flags flags);
   static inline int ExtractArgumentsCountFromFlags(Flags flags);
   static inline InlineCacheHolderFlag ExtractCacheHolderFromFlags(Flags flags);
   static inline Flags RemoveTypeFromFlags(Flags flags);
 
   // Convert a target address into a code object.
   static inline Code* GetCodeFromTargetAddress(Address address);
 
+  // Convert an entry address into an object.
+  static inline Object* GetObjectFromEntryAddress(Address location_of_address);
+
   // Returns the address of the first instruction.
   inline byte* instruction_start();
 
   // Returns the address right after the last instruction.
   inline byte* instruction_end();
 
   // Returns the size of the instructions, padding, and relocation information.
   inline int body_size();
 
   // Returns the address of the first relocation info (read backwards!).
@@ skipping 800 matching lines @@
   // set to 'value', but there is no guarantees on instances created
   // before.
   Object* SetInstanceClassName(String* name);
 
   // Returns if this function has been compiled to native code yet.
   inline bool is_compiled();
 
   // Casting.
   static inline JSFunction* cast(Object* obj);
 
+  // Iterates the objects, including code objects indirectly referenced
+  // through pointers to the first instruction in the code object.
+  void JSFunctionIterateBody(int object_size, ObjectVisitor* v);
+
   // Dispatched behavior.
 #ifdef DEBUG
   void JSFunctionPrint();
   void JSFunctionVerify();
 #endif
 
   // Returns the number of allocated literals.
   inline int NumberOfLiterals();
 
   // Retrieve the global context from a function's literal array.
   static Context* GlobalContextFromLiterals(FixedArray* literals);
 
   // Layout descriptors.
-  static const int kCodeOffset = JSObject::kHeaderSize;
+  static const int kCodeEntryOffset = JSObject::kHeaderSize;
   static const int kPrototypeOrInitialMapOffset =
-      kCodeOffset + kPointerSize;
+      kCodeEntryOffset + kPointerSize;
   static const int kSharedFunctionInfoOffset =
       kPrototypeOrInitialMapOffset + kPointerSize;
   static const int kContextOffset = kSharedFunctionInfoOffset + kPointerSize;
   static const int kLiteralsOffset = kContextOffset + kPointerSize;
   static const int kSize = kLiteralsOffset + kPointerSize;
 
   // Layout of the literals array.
   static const int kLiteralsPrefixSize = 1;
   static const int kLiteralGlobalContextIndex = 0;
  private:
@@ skipping 1694 matching lines @@
   // Visits a contiguous arrays of pointers in the half-open range
   // [start, end). Any or all of the values may be modified on return.
   virtual void VisitPointers(Object** start, Object** end) = 0;
 
   // 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 code entry in a JS function.
+  virtual void VisitCodeEntry(Address entry_address);
+
   // 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.
@@ skipping 52 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_