Method LoadClasses

objectivec/objc.cpp:331–536

}

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

	auto classPtrSectionStart = classPtrSection->GetStart();
	for (size_t i = 0; i < ptrCount; i++)
	{
		Class cls;

		view_ptr_t classPtr;
		class_t clsStruct;
		class_ro_t classRO;

		bool hasValidMetaClass = false;
		bool hasValidMetaClassRO = false;
		class_t metaClsStruct;
		class_ro_t metaClassRO;

		view_ptr_t classPointerLocation = classPtrSectionStart + (i * m_data->GetAddressSize());
		reader->Seek(classPointerLocation);

		classPtr = ReadPointerAccountingForRelocations(reader);
		reader->Seek(classPtr);
		try
		{
			clsStruct.isa = ReadPointerAccountingForRelocations(reader);
			clsStruct.super = reader->ReadPointer();
			clsStruct.cache = reader->ReadPointer();
			clsStruct.vtable = reader->ReadPointer();
			clsStruct.data = ReadPointerAccountingForRelocations(reader);
		}
		catch (...)
		{
			m_logger->LogError("Failed to read class data at 0x%llx pointed to by @ 0x%llx", reader->GetOffset(),
				classPointerLocation);
			continue;
		}
		if (clsStruct.data & 1)
		{
			m_logger->LogInfo("Skipping class at 0x%llx as it contains swift types", classPtr);
			continue;
		}
		// unset first two bits
		view_ptr_t classROPtr = clsStruct.data & ~3;
		reader->Seek(classROPtr);
		try
		{
			classRO.flags = reader->Read32();
			classRO.instanceStart = reader->Read32();
			classRO.instanceSize = reader->Read32();
			if (m_data->GetAddressSize() == 8)
				classRO.reserved = reader->Read32();