[interpreter, debugger] abstraction for source position calculation.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index a824b3b25479fe911bd9afb7ee528cc4ac40a564..9ad9d5fa7c620dd7c16e335994cbad876df557c7 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -847,6 +847,9 @@ TYPE_CHECKER(JSDate, JS_DATE_TYPE)
 TYPE_CHECKER(JSMessageObject, JS_MESSAGE_OBJECT_TYPE)
 
 
+bool Object::IsAbstractCode() const { return IsBytecodeArray() || IsCode(); }
+
+
 bool Object::IsStringWrapper() const {
   return IsJSValue() && JSValue::cast(this)->value()->IsString();
 }
@@ -3178,6 +3181,7 @@ void SeededNumberDictionary::set_requires_slow_elements() {
 // Cast operations
 
 
+CAST_ACCESSOR(AbstractCode)
 CAST_ACCESSOR(ArrayList)
 CAST_ACCESSOR(Bool16x8)
 CAST_ACCESSOR(Bool32x4)
@@ -5278,6 +5282,12 @@ class Code::FindAndReplacePattern {
 };
 
 
+Code* AbstractCode::GetCode() { return Code::cast(this); }
+BytecodeArray* AbstractCode::GetBytecodeArray() {
+  return BytecodeArray::cast(this);
+}
+
+
 Object* Map::prototype() const {
   return READ_FIELD(this, kPrototypeOffset);
 }
@@ -5606,7 +5616,7 @@ ACCESSORS(DebugInfo, shared, SharedFunctionInfo, kSharedFunctionInfoIndex)
 ACCESSORS(DebugInfo, code, Code, kCodeIndex)
 ACCESSORS(DebugInfo, break_points, FixedArray, kBreakPointsStateIndex)
 
-SMI_ACCESSORS(BreakPointInfo, code_position, kCodePositionIndex)
+SMI_ACCESSORS(BreakPointInfo, code_offset, kCodeOffsetIndex)
 SMI_ACCESSORS(BreakPointInfo, source_position, kSourcePositionIndex)
 SMI_ACCESSORS(BreakPointInfo, statement_position, kStatementPositionIndex)
 ACCESSORS(BreakPointInfo, break_point_objects, Object, kBreakPointObjectsIndex)
@@ -5861,6 +5871,12 @@ Code* SharedFunctionInfo::code() const {
 }
 
 
+AbstractCode* SharedFunctionInfo::AbstractCode() {
+  if (HasBytecodeArray()) return AbstractCode::cast(bytecode_array());
+  return AbstractCode::cast(code());
+}
+
+
 void SharedFunctionInfo::set_code(Code* value, WriteBarrierMode mode) {
   DCHECK(value->kind() != Code::OPTIMIZED_FUNCTION);
   WRITE_FIELD(this, kCodeOffset, value);