Add name inference for anonymous functions to facilitate debugging and profiling of JS code.

src/ast.h

 // Copyright 2006-2008 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 1205 matching lines @@
         scope_(scope),
         body_(body),
         materialized_literal_count_(materialized_literal_count),
         contains_array_literal_(contains_array_literal),
         expected_property_count_(expected_property_count),
         num_parameters_(num_parameters),
         start_position_(start_position),
         end_position_(end_position),
         is_expression_(is_expression),
         loop_nesting_(0),
-        function_token_position_(RelocInfo::kNoPosition) {
+        function_token_position_(RelocInfo::kNoPosition),
+        inferred_name_(Heap::empty_string()) {
 #ifdef DEBUG
     already_compiled_ = false;
 #endif
   }
 
   virtual void Accept(AstVisitor* v);
 
   // Type testing & conversion
   virtual FunctionLiteral* AsFunctionLiteral()  { return this; }
 
   Handle<String> name() const  { return name_; }
   Scope* scope() const  { return scope_; }
   ZoneList<Statement*>* body() const  { return body_; }
   void set_function_token_position(int pos) { function_token_position_ = pos; }
   int function_token_position() const { return function_token_position_; }
   int start_position() const { return start_position_; }
   int end_position() const { return end_position_; }
   bool is_expression() const { return is_expression_; }
 
   int materialized_literal_count() { return materialized_literal_count_; }
   bool contains_array_literal() { return contains_array_literal_; }
   int expected_property_count() { return expected_property_count_; }
   int num_parameters() { return num_parameters_; }
 
   bool AllowsLazyCompilation();
 
   bool loop_nesting() const { return loop_nesting_; }
   void set_loop_nesting(int nesting) { loop_nesting_ = nesting; }
 
+  Handle<String> inferred_name() const  { return inferred_name_; }
+  void set_inferred_name(Handle<String> inferred_name) {
+    inferred_name_ = inferred_name;
+  }
+
 #ifdef DEBUG
   void mark_as_compiled() {
     ASSERT(!already_compiled_);
     already_compiled_ = true;
   }
 #endif
 
  private:
   Handle<String> name_;
   Scope* scope_;
   ZoneList<Statement*>* body_;
   int materialized_literal_count_;
   bool contains_array_literal_;
   int expected_property_count_;
   int num_parameters_;
   int start_position_;
   int end_position_;
   bool is_expression_;
   int loop_nesting_;
   int function_token_position_;
+  Handle<String> inferred_name_;
 #ifdef DEBUG
   bool already_compiled_;
 #endif
 };
 
 
 class FunctionBoilerplateLiteral: public Expression {
  public:
   explicit FunctionBoilerplateLiteral(Handle<JSFunction> boilerplate)
       : boilerplate_(boilerplate) {
@@ skipping 408 matching lines @@
 #undef DEF_VISIT
 
  private:
   bool stack_overflow_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_