Add inspection of arguments for optimized frames

src/deoptimizer.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 382 matching lines @@
   Smi* GetState() const { return state_; }
   void SetState(Smi* state) { state_ = state; }
 
   void SetContinuation(intptr_t pc) { continuation_ = pc; }
 
 #ifdef DEBUG
   Code::Kind GetKind() const { return kind_; }
   void SetKind(Code::Kind kind) { kind_ = kind; }
 #endif
 
+  // Get the incoming arguments count.
+  int ComputeParametersCount();
+
+  // Get a parameter value for an unoptimized frame.
+  Object* GetParameter(Deoptimizer* deoptimizer, int index);
+
   // Get the expression stack height for a unoptimized frame.
   unsigned GetExpressionCount(Deoptimizer* deoptimizer);
 
   // Get the expression stack value for an unoptimized frame.
   Object* GetExpression(Deoptimizer* deoptimizer, int index);
 
   static int registers_offset() {
     return OFFSET_OF(FrameDescription, registers_);
   }
 
@@ skipping 242 matching lines @@
 // internally used FrameDescription objects are not GC safe so for use
 // by the debugger frame information is copied to an object of this type.
 class DeoptimizedFrameInfo : public Malloced {
  public:
   DeoptimizedFrameInfo(Deoptimizer* deoptimizer, int frame_index);
   virtual ~DeoptimizedFrameInfo();
 
   // GC support.
   void Iterate(ObjectVisitor* v);
 
+  // Return the number of incoming arguments.
+  int parameters_count() { return parameters_count_; }
+
   // Return the height of the expression stack.
   int expression_count() { return expression_count_; }
 
   // Get the frame function.
   JSFunction* GetFunction() {
     return function_;
   }
 
+  // Get an incoming argument.
+  Object* GetParameter(int index) {
+    ASSERT(0 <= index && index < parameters_count());
+    return parameters_[index];
+  }
+
   // Get an expression from the expression stack.
   Object* GetExpression(int index) {
     ASSERT(0 <= index && index < expression_count());
     return expression_stack_[index];
   }
 
  private:
   // Set the frame function.
   void SetFunction(JSFunction* function) {
     function_ = function;
   }
 
+  // Set an incoming argument.
+  void SetParameter(int index, Object* obj) {
+    ASSERT(0 <= index && index < parameters_count());
+    parameters_[index] = obj;
+  }
+
   // Set an expression on the expression stack.
   void SetExpression(int index, Object* obj) {
     ASSERT(0 <= index && index < expression_count());
     expression_stack_[index] = obj;
   }
 
   JSFunction* function_;
+  int parameters_count_;
   int expression_count_;
+  Object** parameters_;
   Object** expression_stack_;
 
   friend class Deoptimizer;
 };
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEOPTIMIZER_H_