Method LoadCategories

objectivec/objc.cpp:538–648

}

void ObjCProcessor::LoadCategories(ObjCReader* reader, Ref<Section> classPtrSection)
{
	if (!classPtrSection)
		return;
	auto size = classPtrSection->GetEnd() - classPtrSection->GetStart();
	if (size == 0)
		return;
	auto ptrSize = m_data->GetAddressSize();

	auto classPtrSectionStart = classPtrSection->GetStart();
	auto classPtrSectionEnd = classPtrSection->GetEnd();

	auto catType = Type::NamedType(m_data, m_typeNames.category);
	auto ptrType = Type::PointerType(m_data->GetDefaultArchitecture(), catType);
	for (size_t i = classPtrSectionStart; i < classPtrSectionEnd; i += ptrSize)
	{
		Class category;
		category_t cat;

		reader->Seek(i);
		auto catLocation = ReadPointerAccountingForRelocations(reader);
		reader->Seek(catLocation);

		try
		{
			cat.name = ReadPointerAccountingForRelocations(reader);
			cat.cls = ReadPointerAccountingForRelocations(reader);
			cat.instanceMethods = ReadPointerAccountingForRelocations(reader);
			cat.classMethods = ReadPointerAccountingForRelocations(reader);
			cat.protocols = ReadPointerAccountingForRelocations(reader);
			cat.instanceProperties = ReadPointerAccountingForRelocations(reader);
		}
		catch (...)
		{
			m_logger->LogError("Failed to read category pointed to by 0x%llx", i);
			continue;
		}

		std::string categoryAdditionsName;
		std::string categoryBaseClassName;

		if (const auto& it = m_classes.find(cat.cls); it != m_classes.end())
		{
			categoryBaseClassName = it->second.name;
			category.associatedName = it->second.associatedName;
		}
		else if (const auto symbol = GetSymbol(cat.cls))
		{
			if (symbol->GetType() == ImportedDataSymbol || symbol->GetType() == ImportAddressSymbol || symbol->GetType() == DataSymbol)
			{
				// Symbols named `_OBJC_CLASS_$_` are references to external classes.
				// Symbols named `cls_` are classes defined in a loaded image other than
				// the image currently being analyzed. Classes from the current image
				// are found via `m_classes`.
				const std::string_view symbolName = symbol->GetFullNameRef();
				if (symbolName.size() > 14 && symbolName.rfind("_OBJC_CLASS_$_", 0) == 0)
					categoryBaseClassName = symbolName.substr(14);
				else if (symbolName.size() > 4 && symbolName.rfind("cls_", 0) == 0)