Switch full-codegen from StackHandlers to handler table.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 5961dc060f82ac581ccda19073d2375e2dfe9b34..26cf3964600080d3ddae3cf371b16687d66419d4 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -938,6 +938,7 @@ template <class C> inline bool Is(Object* obj);
   V(DeoptimizationInputData)       \
   V(DeoptimizationOutputData)      \
   V(DependentCode)                 \
+  V(HandlerTable)                  \
   V(FixedArray)                    \
   V(FixedDoubleArray)              \
   V(WeakFixedArray)                \
@@ -5062,6 +5063,71 @@ class DeoptimizationOutputData: public FixedArray {
 };
 
 
+// HandlerTable is a fixed array containing entries for exception handlers in
+// the code object it is associated with. The tables comes in two flavors:
+// 1) Based on ranges: Used for unoptimized code. Contains one entry per
+//    exception handler and a range representing the try-block covered by that
+//    handler. Layout looks as follows:
+//      [ range-start , range-end , handler-offset , stack-depth ]
+// 2) Based on return addresses: Used for turbofanned code. Contains one entry
+//    per call-site that could throw an exception. Layout looks as follows:
+//      [ return-address-offset , handler-offset ]
+class HandlerTable : public FixedArray {
+ public:
+  // Accessors for handler table based on ranges.
+  void SetRangeStart(int index, int value) {
+    set(index * kRangeEntrySize + kRangeStartIndex, Smi::FromInt(value));
+  }
+  void SetRangeEnd(int index, int value) {
+    set(index * kRangeEntrySize + kRangeEndIndex, Smi::FromInt(value));
+  }
+  void SetRangeHandler(int index, int value) {
+    set(index * kRangeEntrySize + kRangeHandlerIndex, Smi::FromInt(value));
+  }
+  void SetRangeDepth(int index, int value) {
+    set(index * kRangeEntrySize + kRangeDepthIndex, Smi::FromInt(value));
+  }
+
+  // Accessors for handler table based on return addresses.
+  void SetReturnOffset(int index, int value) {
+    set(index * kReturnEntrySize + kReturnOffsetIndex, Smi::FromInt(value));
+  }
+  void SetReturnHandler(int index, int value) {
+    set(index * kReturnEntrySize + kReturnHandlerIndex, Smi::FromInt(value));
+  }
+
+  // Lookup handler in a table based on ranges.
+  int LookupRange(int pc_offset, int* stack_depth);
+
+  // Lookup handler in a table based on return addresses.
+  int LookupReturn(int pc_offset);
+
+  // Returns the required length of the underlying fixed array.
+  static int LengthForRange(int entries) { return entries * kRangeEntrySize; }
+  static int LengthForReturn(int entries) { return entries * kReturnEntrySize; }
+
+  DECLARE_CAST(HandlerTable)
+
+#if defined(OBJECT_PRINT) || defined(ENABLE_DISASSEMBLER)
+  void HandlerTableRangePrint(std::ostream& os);   // NOLINT
+  void HandlerTableReturnPrint(std::ostream& os);  // NOLINT
+#endif
+
+ private:
+  // Layout description for handler table based on ranges.
+  static const int kRangeStartIndex = 0;
+  static const int kRangeEndIndex = 1;
+  static const int kRangeHandlerIndex = 2;
+  static const int kRangeDepthIndex = 3;
+  static const int kRangeEntrySize = 4;
+
+  // Layout description for handler table based on return addresses.
+  static const int kReturnOffsetIndex = 0;
+  static const int kReturnHandlerIndex = 1;
+  static const int kReturnEntrySize = 2;
+};
+
+
 // Forward declaration.
 class Cell;
 class PropertyCell;
@@ -7344,11 +7410,6 @@ class JSGeneratorObject: public JSObject {
   // [operand_stack]: Saved operand stack.
   DECL_ACCESSORS(operand_stack, FixedArray)
 
-  // [stack_handler_index]: Index of first stack handler in operand_stack, or -1
-  // if the captured activation had no stack handler.
-  inline int stack_handler_index() const;
-  inline void set_stack_handler_index(int stack_handler_index);
-
   DECLARE_CAST(JSGeneratorObject)
 
   // Dispatched behavior.
@@ -7365,9 +7426,7 @@ class JSGeneratorObject: public JSObject {
   static const int kReceiverOffset = kContextOffset + kPointerSize;
   static const int kContinuationOffset = kReceiverOffset + kPointerSize;
   static const int kOperandStackOffset = kContinuationOffset + kPointerSize;
-  static const int kStackHandlerIndexOffset =
-      kOperandStackOffset + kPointerSize;
-  static const int kSize = kStackHandlerIndexOffset + kPointerSize;
+  static const int kSize = kOperandStackOffset + kPointerSize;
 
   // Resume mode, for use by runtime functions.
   enum ResumeMode { NEXT, THROW };