Add a level of indirection to exception handler addresses.

src/frames.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 66 matching lines @@
 
   static const int kInnerPointerToCodeCacheSize = 1024;
   InnerPointerToCodeCacheEntry cache_[kInnerPointerToCodeCacheSize];
 
   DISALLOW_COPY_AND_ASSIGN(InnerPointerToCodeCache);
 };
 
 
 class StackHandler BASE_EMBEDDED {
  public:
-  enum State {
+  enum Kind {
     ENTRY,
     TRY_CATCH,
     TRY_FINALLY
   };
 
+  static const int kKindWidth = 2;
+  static const int kOffsetWidth = 32 - kKindWidth;
+  class KindField: public BitField<StackHandler::Kind, 0, kKindWidth> {};
+  class OffsetField: public BitField<unsigned, kKindWidth, kOffsetWidth> {};
+
   // Get the address of this stack handler.
   inline Address address() const;
 
   // Get the next stack handler in the chain.
   inline StackHandler* next() const;
 
   // Tells whether the given address is inside this handler.
   inline bool includes(Address address) const;
 
   // Garbage collection support.
   inline void Iterate(ObjectVisitor* v, Code* holder) const;
 
   // Conversion support.
   static inline StackHandler* FromAddress(Address address);
 
   // Testers
   inline bool is_entry() const;
   inline bool is_try_catch() const;
   inline bool is_try_finally() const;
 
  private:
   // Accessors.
-  inline State state() const;
+  inline Kind kind() const;
 
   inline Object** context_address() const;
-  inline Address* pc_address() const;
+  inline Object** code_address() const;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler);
 };
 
 
 #define STACK_FRAME_TYPE_LIST(V)              \
   V(ENTRY,             EntryFrame)            \
   V(ENTRY_CONSTRUCT,   EntryConstructFrame)   \
   V(EXIT,              ExitFrame)             \
   V(JAVA_SCRIPT,       JavaScriptFrame)       \
@@ skipping 740 matching lines @@
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap();
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_