Switch full-codegen from StackHandlers to handler table.

src/frames.h

Index: src/frames.h
diff --git a/src/frames.h b/src/frames.h
index 1142ed5a82cd9775e06f09bec3db25cd0bd5ab83..397c7b5db9cf7f912d7c3fe53a9392141b913ae2 100644
--- a/src/frames.h
+++ b/src/frames.h
@@ -66,57 +66,34 @@ class InnerPointerToCodeCache {
 };
 
 
+// Every try-block pushes the context register.
+class TryBlockConstant : public AllStatic {
+ public:
+  static const int kElementCount = 1;
+};
+
+
 class StackHandlerConstants : public AllStatic {
  public:
-  static const int kNextOffset     = 0 * kPointerSize;
-  static const int kStateOffset    = 1 * kPointerSize;
-#if V8_TARGET_LITTLE_ENDIAN || !V8_HOST_ARCH_64_BIT
-  static const int kStateIntOffset = kStateOffset;
-#else
-  static const int kStateIntOffset = kStateOffset + kIntSize;
-#endif
-  static const int kContextOffset  = 2 * kPointerSize;
+  static const int kNextOffset = 0 * kPointerSize;
 
-  static const int kSize = kContextOffset + kPointerSize;
+  static const int kSize = kNextOffset + kPointerSize;
   static const int kSlotCount = kSize >> kPointerSizeLog2;
 };
 
 
 class StackHandler BASE_EMBEDDED {
  public:
-  enum Kind {
-    JS_ENTRY,
-    CATCH,
-    FINALLY,
-  };
-
   // 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);
 
-  // Accessors.
-  inline Context* context() const;
-  inline int index() const;
-
-  // Generator support to preserve stack handlers.
-  void Unwind(Isolate* isolate, FixedArray* array, int offset,
-              int previous_handler_offset) const;
-  int Rewind(Isolate* isolate, FixedArray* array, int offset, Address fp);
-
  private:
-  inline Object** context_address() const;
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler);
 };
 
@@ -256,9 +233,6 @@ class StackFrame BASE_EMBEDDED {
   // Get the id of this stack frame.
   Id id() const { return static_cast<Id>(OffsetFrom(caller_sp())); }
 
-  // Checks if this frame includes any stack handlers.
-  bool HasHandler() const;
-
   // Get the top handler from the current stack iterator.
   inline StackHandler* top_handler() const;
 
@@ -483,10 +457,6 @@ class StandardFrame: public StackFrame {
   Address GetExpressionAddress(int n) const;
   static Address GetExpressionAddress(Address fp, int n);
 
-  // Determines if the n'th expression stack element is in a stack
-  // handler or not. Requires traversing all handlers in this frame.
-  bool IsExpressionInsideHandler(int n) const;
-
   // Determines if the standard frame for the given frame pointer is
   // an arguments adaptor frame.
   static inline bool IsArgumentsAdaptorFrame(Address fp);
@@ -555,9 +525,9 @@ class JavaScriptFrame: public StandardFrame {
   inline Object* GetOperand(int index) const;
   inline int ComputeOperandsCount() const;
 
-  // Generator support to preserve operand stack and stack handlers.
-  void SaveOperandStack(FixedArray* store, int* stack_handler_index) const;
-  void RestoreOperandStack(FixedArray* store, int stack_handler_index);
+  // Generator support to preserve operand stack.
+  void SaveOperandStack(FixedArray* store) const;
+  void RestoreOperandStack(FixedArray* store);
 
   // Debugger access.
   void SetParameterValue(int index, Object* value) const;
@@ -591,6 +561,10 @@ class JavaScriptFrame: public StandardFrame {
   // Build a list with summaries for this frame including all inlined frames.
   virtual void Summarize(List<FrameSummary>* frames);
 
+  // Lookup exception handler for current {pc}, returns -1 if none found. Also
+  // returns the expected number of stack slots at the handler site.
+  virtual int LookupExceptionHandlerInTable(int* stack_slots);
+
   // Architecture-specific register description.
   static Register fp_register();
   static Register context_register();
@@ -663,6 +637,10 @@ class OptimizedFrame : public JavaScriptFrame {
 
   virtual void Summarize(List<FrameSummary>* frames);
 
+  // Lookup exception handler for current {pc}, returns -1 if none found. Also
+  // returns the expected number of stack slots at the handler site.
+  virtual int LookupExceptionHandlerInTable(int* stack_slots);
+
   DeoptimizationInputData* GetDeoptimizationData(int* deopt_index);
 
  protected: