Introduce a lazy-compile stub for functions.

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1473 matching lines @@
   void set_parameter_types(const Array& value) const;
 
   // Parameter names are valid for all valid parameter indices, and are not
   // limited to named optional parameters.
   RawString* ParameterNameAt(intptr_t index) const;
   void SetParameterNameAt(intptr_t index, const String& value) const;
   RawArray* parameter_names() const { return raw_ptr()->parameter_names_; }
   void set_parameter_names(const Array& value) const;
 
   // Sets function's code and code's function.
-  void SetCode(const Code& value) const;
-  void  ClearCode() const;
+  void AttachCode(const Code& value) const;
+  void set_code(const Code& value) const;
+  void ClearCode() const;
 
   // Disables optimized code and switches to unoptimized code.
   void SwitchToUnoptimizedCode() const;
 
   // Return the most recently compiled and installed code for this function.
   // It is not the only Code object that points to this function.
   RawCode* CurrentCode() const { return raw_ptr()->code_; }
 
   RawCode* unoptimized_code() const { return raw_ptr()->unoptimized_code_; }
   void set_unoptimized_code(const Code& value) const;
   static intptr_t code_offset() { return OFFSET_OF(RawFunction, code_); }
   static intptr_t unoptimized_code_offset() {
     return OFFSET_OF(RawFunction, unoptimized_code_);
   }
-  inline bool HasCode() const;
+  bool HasCode() const;
 
   // Returns true if there is at least one debugger breakpoint
   // set in this function.
   bool HasBreakpoint() const;
 
   RawContextScope* context_scope() const;
   void set_context_scope(const ContextScope& value) const;
 
   // Enclosing function of this local function.
   RawFunction* parent_function() const;
@@ skipping 463 matching lines @@
                          const TypeArguments& type_arguments,
                          const Function& other,
                          const TypeArguments& other_type_arguments,
                          Error* bound_error) const;
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Function, Object);
   friend class Class;
   // RawFunction::VisitFunctionPointers accesses the private constructor of
   // Function.
   friend class RawFunction;
+  friend class MarkingVisitor;  // Access to KindBits
 };
 
 
 class ClosureData: public Object {
  public:
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawClosureData));
   }
 
  private:
@@ skipping 966 matching lines @@
 class Stackmap : public Object {
  public:
   static const intptr_t kNoMaximum = -1;
   static const intptr_t kNoMinimum = -1;
 
   bool IsObject(intptr_t index) const {
     ASSERT(InRange(index));
     return GetBit(index);
   }
 
-  RawCode* Code() const { return raw_ptr()->code_; }
-  void SetCode(const dart::Code& code) const;
-
   intptr_t Length() const { return raw_ptr()->length_; }
 
   uword PC() const { return raw_ptr()->pc_; }
   void SetPC(uword value) const { raw_ptr()->pc_ = value; }
 
   intptr_t RegisterBitCount() const { return raw_ptr()->register_bit_count_; }
   void SetRegisterBitCount(intptr_t register_bit_count) const {
     raw_ptr()->register_bit_count_ = register_bit_count;
   }
 
@@ skipping 3632 matching lines @@
     Isolate* isolate = Isolate::Current();
     Heap* isolate_heap = isolate->heap();
     Heap* vm_isolate_heap = Dart::vm_isolate()->heap();
     ASSERT(isolate_heap->Contains(RawObject::ToAddr(raw_)) ||
            vm_isolate_heap->Contains(RawObject::ToAddr(raw_)));
   }
 #endif
 }
 
 
-bool Function::HasCode() const {
-  return raw_ptr()->code_ != Code::null();
-}
-
-
 intptr_t Field::Offset() const {
   ASSERT(!is_static());  // Offset is valid only for instance fields.
   intptr_t value = Smi::Value(reinterpret_cast<RawSmi*>(raw_ptr()->value_));
   return (value * kWordSize);
 }
 
 
 void Field::SetOffset(intptr_t value_in_bytes) const {
   ASSERT(!is_static());  // SetOffset is valid only for instance fields.
   ASSERT(kWordSize != 0);
@@ skipping 82 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_