Generators save and restore stack handlers

src/frames-inl.h

 // Copyright 2012 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 80 matching lines @@
   return kind() == FINALLY;
 }
 
 
 inline StackHandler::Kind StackHandler::kind() const {
   const int offset = StackHandlerConstants::kStateOffset;
   return KindField::decode(Memory::unsigned_at(address() + offset));
 }
 
 
+inline unsigned StackHandler::index() const {
+  const int offset = StackHandlerConstants::kStateOffset;
+  return IndexField::decode(Memory::unsigned_at(address() + offset));
+}
+
+
 inline Object** StackHandler::context_address() const {
   const int offset = StackHandlerConstants::kContextOffset;
   return reinterpret_cast<Object**>(address() + offset);
 }
 
 
 inline Object** StackHandler::code_address() const {
   const int offset = StackHandlerConstants::kCodeOffset;
   return reinterpret_cast<Object**>(address() + offset);
 }
@@ skipping 98 matching lines @@
 
 
 Object* JavaScriptFrame::GetParameter(int index) const {
   return Memory::Object_at(GetParameterSlot(index));
 }
 
 
 inline Address JavaScriptFrame::GetOperandSlot(int index) const {
   Address base = fp() + JavaScriptFrameConstants::kLocal0Offset;
   ASSERT(IsAddressAligned(base, kPointerSize));
-  ASSERT(type() == JAVA_SCRIPT);
-  ASSERT(index < ComputeOperandsCount());
+  ASSERT_EQ(type(), JAVA_SCRIPT);
+  ASSERT_LT(index, ComputeOperandsCount());
+  ASSERT_LE(0, index);
   // Operand stack grows down.
   return base - index * kPointerSize;
 }
 
 
 inline Object* JavaScriptFrame::GetOperand(int index) const {
   return Memory::Object_at(GetOperandSlot(index));
 }
 
 
@@ skipping 125 matching lines @@
 template<typename Iterator>
 void JavaScriptFrameIteratorTemp<Iterator>::Reset() {
   iterator_.Reset();
   if (!done()) Advance();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_INL_H_