Add DIETypeUnit.

Represents a top level unit from DWARF 4's .debug_types section, akin
to a compilation unit.

src/apps/debugger/dwarf/DebugInfoEntries.cpp

@@ -2527,6 +2527,42 @@ DIESharedType::AddAttribute_decl_column(uint16 attributeName,
 }
 
 
+// #pragma mark - DIETypeUnit
+
+
+DIETypeUnit::DIETypeUnit()
+	:
+	fLanguage(0)
+{
+}
+
+
+uint16
+DIETypeUnit::Tag() const
+{
+	return DW_TAG_type_unit;
+}
+
+
+status_t
+DIETypeUnit::AddChild(DebugInfoEntry* child)
+{
+	if (child->IsType())
+		fType = dynamic_cast<DIEType*>(child);
+
+	return B_OK;
+}
+
+
+status_t
+DIETypeUnit::AddAttribute_language(uint16 attributeName,
+	const AttributeValue& value)
+{
+	fLanguage = value.constant;
+	return B_OK;
+}
+
+
 // #pragma mark - DIETemplateTypeParameterPack
 
 
@@ -2887,6 +2923,9 @@ DebugInfoEntryFactory::CreateDebugInfoEntry(uint16 tag, DebugInfoEntry*& _entry)
 		case DW_TAG_shared_type:
 			entry = new(std::nothrow) DIESharedType;
 			break;
+		case DW_TAG_type_unit:
+			entry = new(std::nothrow) DIETypeUnit;
+			break;
 		case DW_TAG_GNU_template_parameter_pack:
 			entry = new(std::nothrow) DIETemplateTypeParameterPack;
 			break;

src/apps/debugger/dwarf/DebugInfoEntries.h

@@ -1606,6 +1606,27 @@ private:
 };
 
 
+class DIETypeUnit : public DebugInfoEntry {
+public:
+								DIETypeUnit();
+
+	virtual	uint16				Tag() const;
+
+			uint16				Language() const	{ return fLanguage; }
+
+	virtual	status_t			AddChild(DebugInfoEntry* child);
+
+	virtual	status_t			AddAttribute_language(uint16 attributeName,
+									const AttributeValue& value);
+	inline	DIEType*			GetType() const { return fType; }
+
+
+private:
+			uint16				fLanguage;
+			DIEType*			fType;
+};
+
+
 class DIETemplateTypeParameterPack : public DIEDeclaredBase {
 public:
 								DIETemplateTypeParameterPack();