From 768f7c78465fb93936e5ca50a0ca712664fe54e7 Mon Sep 17 00:00:00 2001
From: kat <kat@vector35.com>
Date: Sun, 6 Jul 2025 15:05:01 -0400
Subject: KernelCache rewrite

---
 view/kernelcache/core/refcountobject.h | 223 +++++++++++++++++++++++++++++++++
 1 file changed, 223 insertions(+)
 create mode 100644 view/kernelcache/core/refcountobject.h

(limited to 'view/kernelcache/core/refcountobject.h')

diff --git a/view/kernelcache/core/refcountobject.h b/view/kernelcache/core/refcountobject.h
new file mode 100644
index 00000000..06996da9
--- /dev/null
+++ b/view/kernelcache/core/refcountobject.h
@@ -0,0 +1,223 @@
+/*
+Copyright 2020-2024 Vector 35 Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#pragma once
+
+#ifdef WIN32
+	#include <windows.h>
+#endif
+#include <stddef.h>
+#include <vector>
+#include <atomic>
+
+namespace BinaryNinja::KC {
+	class KCRefCountObject
+	{
+		// CORE_ALLOCATED_CLASS(RefCountObject)
+
+	public:
+		std::atomic<int> m_refs;
+
+		KCRefCountObject() : m_refs(0) {}
+
+		virtual ~KCRefCountObject() {}
+
+		virtual void AddRef() { m_refs.fetch_add(1); }
+
+		virtual void Release()
+		{
+			if (m_refs.fetch_sub(1) == 1)
+				delete this;
+		}
+
+		virtual void AddAPIRef() { AddRef(); }
+
+		virtual void ReleaseAPIRef() { Release(); }
+	};
+
+
+	template <class T>
+	class KCRef
+	{
+		T* m_obj;
+#ifdef BN_REF_COUNT_DEBUG
+		void* m_assignmentTrace = nullptr;
+#endif
+
+	public:
+		KCRef() : m_obj(NULL) {}
+
+		KCRef(T* obj) : m_obj(obj)
+		{
+			if (m_obj)
+			{
+				m_obj->AddRef();
+#ifdef BN_REF_COUNT_DEBUG
+				m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
+#endif
+			}
+		}
+
+		KCRef(const KCRef& obj) : m_obj(obj.m_obj)
+		{
+			if (m_obj)
+			{
+				m_obj->AddRef();
+#ifdef BN_REF_COUNT_DEBUG
+				m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
+#endif
+			}
+		}
+
+		~KCRef()
+		{
+			if (m_obj)
+			{
+				m_obj->Release();
+#ifdef BN_REF_COUNT_DEBUG
+				BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
+#endif
+			}
+		}
+
+		// move constructor
+		KCRef(KCRef&& other) : m_obj(other.m_obj)
+		{
+			other.m_obj = 0;
+#ifdef BN_REF_COUNT_DEBUG
+			m_assignmentTrace = other.m_assignmentTrace;
+#endif
+		}
+
+		// move assignment (inefficient in this case)
+		// Ref<T>& operator=(Ref<T>&& other)
+		// {
+		// 	if (m_obj)
+		//	{
+		// #ifdef BN_REF_COUNT_DEBUG
+		//		BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
+		// #endif
+		//		m_obj->Release();
+		//	}
+		// 	m_obj = other.m_obj;
+		// 	other.m_obj = 0;
+		// #ifdef BN_REF_COUNT_DEBUG
+		//	m_assignmentTrace = other.m_assignmentTrace;
+		// #endif
+		// 	return *this;
+		// }
+
+		KCRef<T>& operator=(const KCRef<T>& obj)
+		{
+#ifdef BN_REF_COUNT_DEBUG
+			if (m_obj)
+				BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
+			if (obj.m_obj)
+				m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
+#endif
+			T* oldObj = m_obj;
+			m_obj = obj.m_obj;
+			if (m_obj)
+				m_obj->AddRef();
+			if (oldObj)
+				oldObj->Release();
+			return *this;
+		}
+
+		KCRef<T>& operator=(T* obj)
+		{
+#ifdef BN_REF_COUNT_DEBUG
+			if (m_obj)
+				BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
+			if (obj)
+				m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
+#endif
+			T* oldObj = m_obj;
+			m_obj = obj;
+			if (m_obj)
+				m_obj->AddRef();
+			if (oldObj)
+				oldObj->Release();
+			return *this;
+		}
+
+		operator T*() const { return m_obj; }
+
+		T* operator->() const { return m_obj; }
+
+		T& operator*() const { return *m_obj; }
+
+		bool operator!() const { return m_obj == NULL; }
+
+		T* GetPtr() const { return m_obj; }
+
+		bool operator==(const KCRef<T>& obj) const { return m_obj == obj.m_obj; }
+
+		bool operator!=(const KCRef<T>& obj) const { return m_obj != obj.m_obj; }
+
+		bool operator<(const KCRef<T>& obj) const { return m_obj < obj.m_obj; }
+
+		template <typename H>
+		friend H AbslHashValue(H h, const KCRef<T>& value)
+		{
+			return AbslHashValue(std::move(h), value.m_obj);
+		}
+	};
+
+
+	// Macro-like functions to manage referenced objects for the external API
+	template <class T>
+	static typename T::APIHandle KC_API_OBJECT_REF(T* obj)
+	{
+		if (obj == nullptr)
+			return nullptr;
+		obj->AddAPIRef();
+		return obj->GetAPIObject();
+	}
+
+	template <class T>
+	static typename T::APIHandle KC_API_OBJECT_REF(const KCRef<T>& obj)
+	{
+		if (!obj)
+			return nullptr;
+		obj->AddAPIRef();
+		return obj->GetAPIObject();
+	}
+
+	// template <class T>
+	// static typename T::APIHandle KC_API_OBJECT_REF(const APIRef<T>& obj)
+	//{
+	//	if (!obj)
+	//		return nullptr;
+	//	obj->AddAPIRef();
+	//	return obj->GetAPIObject();
+	// }
+
+	template <class T>
+	static T* KC_API_OBJECT_NEW_REF(T* obj)
+	{
+		if (obj)
+			obj->object->AddAPIRef();
+		return obj;
+	}
+
+	template <class T>
+	static void KC_API_OBJECT_FREE(T* obj)
+	{
+		if (obj)
+			obj->object->ReleaseAPIRef();
+	}
+};  // namespace BinaryNinja::KC
-- 
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