Enable CPU JIT cache invalidation (#2965)

* Enable CPU JIT cache invalidation

* Invalidate cache on IC IVAU

ARMeilleure/Instructions/InstEmitSystem.cs

@@ -12,7 +12,8 @@ namespace ARMeilleure.Instructions
 {
     static partial class InstEmit
     {
-        private const int DczSizeLog2 = 4;
+        private const int DczSizeLog2 = 4; // Log2 size in words
+        public const int DczSizeInBytes = 4 << DczSizeLog2;
 
         public static void Hint(ArmEmitterContext context)
         {
@@ -87,7 +88,7 @@ namespace ARMeilleure.Instructions
                     // DC ZVA
                     Operand t = GetIntOrZR(context, op.Rt);
 
-                    for (long offset = 0; offset < (4 << DczSizeLog2); offset += 8)
+                    for (long offset = 0; offset < DczSizeInBytes; offset += 8)
                     {
                         Operand address = context.Add(t, Const(offset));
 
@@ -98,7 +99,12 @@ namespace ARMeilleure.Instructions
                 }
 
                 // No-op
-                case 0b11_011_0111_1110_001: //DC CIVAC
+                case 0b11_011_0111_1110_001: // DC CIVAC
+                    break;
+
+                case 0b11_011_0111_0101_001: // IC IVAU
+                    Operand target = Register(op.Rt, RegisterType.Integer, OperandType.I64);
+                    context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.InvalidateCacheLine)), target);
                     break;
             }
         }

ARMeilleure/Instructions/NativeInterface.cs

@@ -242,6 +242,11 @@ namespace ARMeilleure.Instructions
             return (ulong)function.FuncPtr.ToInt64();
         }
 
+        public static void InvalidateCacheLine(ulong address)
+        {
+            Context.Translator.InvalidateJitCacheRegion(address, InstEmit.DczSizeInBytes);
+        }
+
         public static bool CheckSynchronization()
         {
             Statistics.PauseTimer();

ARMeilleure/Translation/Delegates.cs

@@ -114,6 +114,7 @@ namespace ARMeilleure.Translation
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpscr))); // A32 only.
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpsr)));
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFunctionAddress)));
+            SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.InvalidateCacheLine)));
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr)));
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr32))); // A32 only.
             SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl0)));

ARMeilleure/Translation/IntervalTree.cs

@@ -0,0 +1,756 @@
+using System;
+using System.Collections.Generic;
+
+namespace ARMeilleure.Translation
+{
+    /// <summary>
+    /// An Augmented Interval Tree based off of the "TreeDictionary"'s Red-Black Tree. Allows fast overlap checking of ranges.
+    /// </summary>
+    /// <typeparam name="K">Key</typeparam>
+    /// <typeparam name="V">Value</typeparam>
+    public class IntervalTree<K, V> where K : IComparable<K>
+    {
+        private const int ArrayGrowthSize = 32;
+
+        private const bool Black = true;
+        private const bool Red = false;
+        private IntervalTreeNode<K, V> _root = null;
+        private int _count = 0;
+
+        public int Count => _count;
+
+        public IntervalTree() { }
+
+        #region Public Methods
+
+        /// <summary>
+        /// Gets the values of the interval whose key is <paramref name="key"/>.
+        /// </summary>
+        /// <param name="key">Key of the node value to get</param>
+        /// <param name="value">Value with the given <paramref name="key"/></param>
+        /// <returns>True if the key is on the dictionary, false otherwise</returns>
+        public bool TryGet(K key, out V value)
+        {
+            IntervalTreeNode<K, V> node = GetNode(key);
+
+            if (node == null)
+            {
+                value = default;
+                return false;
+            }
+
+            value = node.Value;
+            return true;
+        }
+
+        /// <summary>
+        /// Returns the start addresses of the intervals whose start and end keys overlap the given range.
+        /// </summary>
+        /// <param name="start">Start of the range</param>
+        /// <param name="end">End of the range</param>
+        /// <param name="overlaps">Overlaps array to place results in</param>
+        /// <param name="overlapCount">Index to start writing results into the array. Defaults to 0</param>
+        /// <returns>Number of intervals found</returns>
+        public int Get(K start, K end, ref K[] overlaps, int overlapCount = 0)
+        {
+            GetValues(_root, start, end, ref overlaps, ref overlapCount);
+
+            return overlapCount;
+        }
+
+        /// <summary>
+        /// Adds a new interval into the tree whose start is <paramref name="start"/>, end is <paramref name="end"/> and value is <paramref name="value"/>.
+        /// </summary>
+        /// <param name="start">Start of the range to add</param>
+        /// <param name="end">End of the range to insert</param>
+        /// <param name="value">Value to add</param>
+        /// <param name="updateFactoryCallback">Optional factory used to create a new value if <paramref name="start"/> is already on the tree</param>
+        /// <exception cref="ArgumentNullException"><paramref name="value"/> is null</exception>
+        /// <returns>True if the value was added, false if the start key was already in the dictionary</returns>
+        public bool AddOrUpdate(K start, K end, V value, Func<K, V, V> updateFactoryCallback)
+        {
+            if (value == null)
+            {
+                throw new ArgumentNullException(nameof(value));
+            }
+
+            return BSTInsert(start, end, value, updateFactoryCallback, out IntervalTreeNode<K, V> node);
+        }
+
+        /// <summary>
+        /// Gets an existing or adds a new interval into the tree whose start is <paramref name="start"/>, end is <paramref name="end"/> and value is <paramref name="value"/>.
+        /// </summary>
+        /// <param name="start">Start of the range to add</param>
+        /// <param name="end">End of the range to insert</param>
+        /// <param name="value">Value to add</param>
+        /// <exception cref="ArgumentNullException"><paramref name="value"/> is null</exception>
+        /// <returns><paramref name="value"/> if <paramref name="start"/> is not yet on the tree, or the existing value otherwise</returns>
+        public V GetOrAdd(K start, K end, V value)
+        {
+            if (value == null)
+            {
+                throw new ArgumentNullException(nameof(value));
+            }
+
+            BSTInsert(start, end, value, null, out IntervalTreeNode<K, V> node);
+            return node.Value;
+        }
+
+        /// <summary>
+        /// Removes a value from the tree, searching for it with <paramref name="key"/>.
+        /// </summary>
+        /// <param name="key">Key of the node to remove</param>
+        /// <returns>Number of deleted values</returns>
+        public int Remove(K key)
+        {
+            int removed = Delete(key);
+
+            _count -= removed;
+
+            return removed;
+        }
+
+        /// <summary>
+        /// Adds all the nodes in the dictionary into <paramref name="list"/>.
+        /// </summary>
+        /// <returns>A list of all values sorted by Key Order</returns>
+        public List<V> AsList()
+        {
+            List<V> list = new List<V>();
+
+            AddToList(_root, list);
+
+            return list;
+        }
+
+        #endregion
+
+        #region Private Methods (BST)
+
+        /// <summary>
+        /// Adds all values that are children of or contained within <paramref name="node"/> into <paramref name="list"/>, in Key Order.
+        /// </summary>
+        /// <param name="node">The node to search for values within</param>
+        /// <param name="list">The list to add values to</param>
+        private void AddToList(IntervalTreeNode<K, V> node, List<V> list)
+        {
+            if (node == null)
+            {
+                return;
+            }
+
+            AddToList(node.Left, list);
+
+            list.Add(node.Value);
+
+            AddToList(node.Right, list);
+        }
+
+        /// <summary>
+        /// Retrieve the node reference whose key is <paramref name="key"/>, or null if no such node exists.
+        /// </summary>
+        /// <param name="key">Key of the node to get</param>
+        /// <exception cref="ArgumentNullException"><paramref name="key"/> is null</exception>
+        /// <returns>Node reference in the tree</returns>
+        private IntervalTreeNode<K, V> GetNode(K key)
+        {
+            if (key == null)
+            {
+                throw new ArgumentNullException(nameof(key));
+            }
+
+            IntervalTreeNode<K, V> node = _root;
+            while (node != null)
+            {
+                int cmp = key.CompareTo(node.Start);
+                if (cmp < 0)
+                {
+                    node = node.Left;
+                }
+                else if (cmp > 0)
+                {
+                    node = node.Right;
+                }
+                else
+                {
+                    return node;
+                }
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Retrieve all values that overlap the given start and end keys.
+        /// </summary>
+        /// <param name="start">Start of the range</param>
+        /// <param name="end">End of the range</param>
+        /// <param name="overlaps">Overlaps array to place results in</param>
+        /// <param name="overlapCount">Overlaps count to update</param>
+        private void GetValues(IntervalTreeNode<K, V> node, K start, K end, ref K[] overlaps, ref int overlapCount)
+        {
+            if (node == null || start.CompareTo(node.Max) >= 0)
+            {
+                return;
+            }
+
+            GetValues(node.Left, start, end, ref overlaps, ref overlapCount);
+
+            bool endsOnRight = end.CompareTo(node.Start) > 0;
+            if (endsOnRight)
+            {
+                if (start.CompareTo(node.End) < 0)
+                {
+                    if (overlaps.Length >= overlapCount)
+                    {
+                        Array.Resize(ref overlaps, overlapCount + ArrayGrowthSize);
+                    }
+
+                    overlaps[overlapCount++] = node.Start;
+                }
+
+                GetValues(node.Right, start, end, ref overlaps, ref overlapCount);
+            }
+        }
+
+        /// <summary>
+        /// Propagate an increase in max value starting at the given node, heading up the tree.
+        /// This should only be called if the max increases - not for rebalancing or removals.
+        /// </summary>
+        /// <param name="node">The node to start propagating from</param>
+        private void PropagateIncrease(IntervalTreeNode<K, V> node)
+        {
+            K max = node.Max;
+            IntervalTreeNode<K, V> ptr = node;
+
+            while ((ptr = ptr.Parent) != null)
+            {
+                if (max.CompareTo(ptr.Max) > 0)
+                {
+                    ptr.Max = max;
+                }
+                else
+                {
+                    break;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Propagate recalculating max value starting at the given node, heading up the tree.
+        /// This fully recalculates the max value from all children when there is potential for it to decrease.
+        /// </summary>
+        /// <param name="node">The node to start propagating from</param>
+        private void PropagateFull(IntervalTreeNode<K, V> node)
+        {
+            IntervalTreeNode<K, V> ptr = node;
+
+            do
+            {
+                K max = ptr.End;
+
+                if (ptr.Left != null && ptr.Left.Max.CompareTo(max) > 0)
+                {
+                    max = ptr.Left.Max;
+                }
+
+                if (ptr.Right != null && ptr.Right.Max.CompareTo(max) > 0)
+                {
+                    max = ptr.Right.Max;
+                }
+
+                ptr.Max = max;
+            } while ((ptr = ptr.Parent) != null);
+        }
+
+        /// <summary>
+        /// Insertion Mechanism for the interval tree. Similar to a BST insert, with the start of the range as the key.
+        /// Iterates the tree starting from the root and inserts a new node where all children in the left subtree are less than <paramref name="start"/>, and all children in the right subtree are greater than <paramref name="start"/>.
+        /// Each node can contain multiple values, and has an end address which is the maximum of all those values.
+        /// Post insertion, the "max" value of the node and all parents are updated.
+        /// </summary>
+        /// <param name="start">Start of the range to insert</param>
+        /// <param name="end">End of the range to insert</param>
+        /// <param name="value">Value to insert</param>
+        /// <param name="updateFactoryCallback">Optional factory used to create a new value if <paramref name="start"/> is already on the tree</param>
+        /// <param name="outNode">Node that was inserted or modified</param>
+        /// <returns>True if <paramref name="start"/> was not yet on the tree, false otherwise</returns>
+        private bool BSTInsert(K start, K end, V value, Func<K, V, V> updateFactoryCallback, out IntervalTreeNode<K, V> outNode)
+        {
+            IntervalTreeNode<K, V> parent = null;
+            IntervalTreeNode<K, V> node = _root;
+
+            while (node != null)
+            {
+                parent = node;
+                int cmp = start.CompareTo(node.Start);
+                if (cmp < 0)
+                {
+                    node = node.Left;
+                }
+                else if (cmp > 0)
+                {
+                    node = node.Right;
+                }
+                else
+                {
+                    outNode = node;
+
+                    if (updateFactoryCallback != null)
+                    {
+                        // Replace
+                        node.Value = updateFactoryCallback(start, node.Value);
+
+                        int endCmp = end.CompareTo(node.End);
+
+                        if (endCmp > 0)
+                        {
+                            node.End = end;
+                            if (end.CompareTo(node.Max) > 0)
+                            {
+                                node.Max = end;
+                                PropagateIncrease(node);
+                                RestoreBalanceAfterInsertion(node);
+                            }
+                        }
+                        else if (endCmp < 0)
+                        {
+                            node.End = end;
+                            PropagateFull(node);
+                        }
+                    }
+
+                    return false;
+                }
+            }
+            IntervalTreeNode<K, V> newNode = new IntervalTreeNode<K, V>(start, end, value, parent);
+            if (newNode.Parent == null)
+            {
+                _root = newNode;
+            }
+            else if (start.CompareTo(parent.Start) < 0)
+            {
+                parent.Left = newNode;
+            }
+            else
+            {
+                parent.Right = newNode;
+            }
+
+            PropagateIncrease(newNode);
+            _count++;
+            RestoreBalanceAfterInsertion(newNode);
+            outNode = newNode;
+            return true;
+        }
+
+        /// <summary>
+        /// Removes the value from the dictionary after searching for it with <paramref name="key">.
+        /// </summary>
+        /// <param name="key">Key to search for</param>
+        /// <returns>Number of deleted values</returns>
+        private int Delete(K key)
+        {
+            IntervalTreeNode<K, V> nodeToDelete = GetNode(key);
+
+            if (nodeToDelete == null)
+            {
+                return 0;
+            }
+
+            IntervalTreeNode<K, V> replacementNode;
+
+            if (LeftOf(nodeToDelete) == null || RightOf(nodeToDelete) == null)
+            {
+                replacementNode = nodeToDelete;
+            }
+            else
+            {
+                replacementNode = PredecessorOf(nodeToDelete);
+            }
+
+            IntervalTreeNode<K, V> tmp = LeftOf(replacementNode) ?? RightOf(replacementNode);
+
+            if (tmp != null)
+            {
+                tmp.Parent = ParentOf(replacementNode);
+            }
+
+            if (ParentOf(replacementNode) == null)
+            {
+                _root = tmp;
+            }
+            else if (replacementNode == LeftOf(ParentOf(replacementNode)))
+            {
+                ParentOf(replacementNode).Left = tmp;
+            }
+            else
+            {
+                ParentOf(replacementNode).Right = tmp;
+            }
+
+            if (replacementNode != nodeToDelete)
+            {
+                nodeToDelete.Start = replacementNode.Start;
+                nodeToDelete.Value = replacementNode.Value;
+                nodeToDelete.End = replacementNode.End;
+                nodeToDelete.Max = replacementNode.Max;
+            }
+
+            PropagateFull(replacementNode);
+
+            if (tmp != null && ColorOf(replacementNode) == Black)
+            {
+                RestoreBalanceAfterRemoval(tmp);
+            }
+
+            return 1;
+        }
+
+        /// <summary>
+        /// Returns the node with the largest key where <paramref name="node"/> is considered the root node.
+        /// </summary>
+        /// <param name="node">Root Node</param>
+        /// <returns>Node with the maximum key in the tree of <paramref name="node"/></returns>
+        private static IntervalTreeNode<K, V> Maximum(IntervalTreeNode<K, V> node)
+        {
+            IntervalTreeNode<K, V> tmp = node;
+            while (tmp.Right != null)
+            {
+                tmp = tmp.Right;
+            }
+
+            return tmp;
+        }
+
+        /// <summary>
+        /// Finds the node whose key is immediately less than <paramref name="node"/>.
+        /// </summary>
+        /// <param name="node">Node to find the predecessor of</param>
+        /// <returns>Predecessor of <paramref name="node"/></returns>
+        private static IntervalTreeNode<K, V> PredecessorOf(IntervalTreeNode<K, V> node)
+        {
+            if (node.Left != null)
+            {
+                return Maximum(node.Left);
+            }
+            IntervalTreeNode<K, V> parent = node.Parent;
+            while (parent != null && node == parent.Left)
+            {
+                node = parent;
+                parent = parent.Parent;
+            }
+            return parent;
+        }
+
+        #endregion
+
+        #region Private Methods (RBL)
+
+        private void RestoreBalanceAfterRemoval(IntervalTreeNode<K, V> balanceNode)
+        {
+            IntervalTreeNode<K, V> ptr = balanceNode;
+
+            while (ptr != _root && ColorOf(ptr) == Black)
+            {
+                if (ptr == LeftOf(ParentOf(ptr)))
+                {
+                    IntervalTreeNode<K, V> sibling = RightOf(ParentOf(ptr));
+
+                    if (ColorOf(sibling) == Red)
+                    {
+                        SetColor(sibling, Black);
+                        SetColor(ParentOf(ptr), Red);
+                        RotateLeft(ParentOf(ptr));
+                        sibling = RightOf(ParentOf(ptr));
+                    }
+                    if (ColorOf(LeftOf(sibling)) == Black && ColorOf(RightOf(sibling)) == Black)
+                    {
+                        SetColor(sibling, Red);
+                        ptr = ParentOf(ptr);
+                    }
+                    else
+                    {
+                        if (ColorOf(RightOf(sibling)) == Black)
+                        {
+                            SetColor(LeftOf(sibling), Black);
+                            SetColor(sibling, Red);
+                            RotateRight(sibling);
+                            sibling = RightOf(ParentOf(ptr));
+                        }
+                        SetColor(sibling, ColorOf(ParentOf(ptr)));
+                        SetColor(ParentOf(ptr), Black);
+                        SetColor(RightOf(sibling), Black);
+                        RotateLeft(ParentOf(ptr));
+                        ptr = _root;
+                    }
+                }
+                else
+                {
+                    IntervalTreeNode<K, V> sibling = LeftOf(ParentOf(ptr));
+
+                    if (ColorOf(sibling) == Red)
+                    {
+                        SetColor(sibling, Black);
+                        SetColor(ParentOf(ptr), Red);
+                        RotateRight(ParentOf(ptr));
+                        sibling = LeftOf(ParentOf(ptr));
+                    }
+                    if (ColorOf(RightOf(sibling)) == Black && ColorOf(LeftOf(sibling)) == Black)
+                    {
+                        SetColor(sibling, Red);
+                        ptr = ParentOf(ptr);
+                    }
+                    else
+                    {
+                        if (ColorOf(LeftOf(sibling)) == Black)
+                        {
+                            SetColor(RightOf(sibling), Black);
+                            SetColor(sibling, Red);
+                            RotateLeft(sibling);
+                            sibling = LeftOf(ParentOf(ptr));
+                        }
+                        SetColor(sibling, ColorOf(ParentOf(ptr)));
+                        SetColor(ParentOf(ptr), Black);
+                        SetColor(LeftOf(sibling), Black);
+                        RotateRight(ParentOf(ptr));
+                        ptr = _root;
+                    }
+                }
+            }
+            SetColor(ptr, Black);
+        }
+
+        private void RestoreBalanceAfterInsertion(IntervalTreeNode<K, V> balanceNode)
+        {
+            SetColor(balanceNode, Red);
+            while (balanceNode != null && balanceNode != _root && ColorOf(ParentOf(balanceNode)) == Red)
+            {
+                if (ParentOf(balanceNode) == LeftOf(ParentOf(ParentOf(balanceNode))))
+                {
+                    IntervalTreeNode<K, V> sibling = RightOf(ParentOf(ParentOf(balanceNode)));
+
+                    if (ColorOf(sibling) == Red)
+                    {
+                        SetColor(ParentOf(balanceNode), Black);
+                        SetColor(sibling, Black);
+                        SetColor(ParentOf(ParentOf(balanceNode)), Red);
+                        balanceNode = ParentOf(ParentOf(balanceNode));
+                    }
+                    else
+                    {
+                        if (balanceNode == RightOf(ParentOf(balanceNode)))
+                        {
+                            balanceNode = ParentOf(balanceNode);
+                            RotateLeft(balanceNode);
+                        }
+                        SetColor(ParentOf(balanceNode), Black);
+                        SetColor(ParentOf(ParentOf(balanceNode)), Red);
+                        RotateRight(ParentOf(ParentOf(balanceNode)));
+                    }
+                }
+                else
+                {
+                    IntervalTreeNode<K, V> sibling = LeftOf(ParentOf(ParentOf(balanceNode)));
+
+                    if (ColorOf(sibling) == Red)
+                    {
+                        SetColor(ParentOf(balanceNode), Black);
+                        SetColor(sibling, Black);
+                        SetColor(ParentOf(ParentOf(balanceNode)), Red);
+                        balanceNode = ParentOf(ParentOf(balanceNode));
+                    }
+                    else
+                    {
+                        if (balanceNode == LeftOf(ParentOf(balanceNode)))
+                        {
+                            balanceNode = ParentOf(balanceNode);
+                            RotateRight(balanceNode);
+                        }
+                        SetColor(ParentOf(balanceNode), Black);
+                        SetColor(ParentOf(ParentOf(balanceNode)), Red);
+                        RotateLeft(ParentOf(ParentOf(balanceNode)));
+                    }
+                }
+            }
+            SetColor(_root, Black);
+        }
+
+        private void RotateLeft(IntervalTreeNode<K, V> node)
+        {
+            if (node != null)
+            {
+                IntervalTreeNode<K, V> right = RightOf(node);
+                node.Right = LeftOf(right);
+                if (node.Right != null)
+                {
+                    node.Right.Parent = node;
+                }
+                IntervalTreeNode<K, V> nodeParent = ParentOf(node);
+                right.Parent = nodeParent;
+                if (nodeParent == null)
+                {
+                    _root = right;
+                }
+                else if (node == LeftOf(nodeParent))
+                {
+                    nodeParent.Left = right;
+                }
+                else
+                {
+                    nodeParent.Right = right;
+                }
+                right.Left = node;
+                node.Parent = right;
+
+                PropagateFull(node);
+            }
+        }
+
+        private void RotateRight(IntervalTreeNode<K, V> node)
+        {
+            if (node != null)
+            {
+                IntervalTreeNode<K, V> left = LeftOf(node);
+                node.Left = RightOf(left);
+                if (node.Left != null)
+                {
+                    node.Left.Parent = node;
+                }
+                IntervalTreeNode<K, V> nodeParent = ParentOf(node);
+                left.Parent = nodeParent;
+                if (nodeParent == null)
+                {
+                    _root = left;
+                }
+                else if (node == RightOf(nodeParent))
+                {
+                    nodeParent.Right = left;
+                }
+                else
+                {
+                    nodeParent.Left = left;
+                }
+                left.Right = node;
+                node.Parent = left;
+
+                PropagateFull(node);
+            }
+        }
+
+        #endregion
+
+        #region Safety-Methods
+
+        // These methods save memory by allowing us to forego sentinel nil nodes, as well as serve as protection against NullReferenceExceptions.
+
+        /// <summary>
+        /// Returns the color of <paramref name="node"/>, or Black if it is null.
+        /// </summary>
+        /// <param name="node">Node</param>
+        /// <returns>The boolean color of <paramref name="node"/>, or black if null</returns>
+        private static bool ColorOf(IntervalTreeNode<K, V> node)
+        {
+            return node == null || node.Color;
+        }
+
+        /// <summary>
+        /// Sets the color of <paramref name="node"/> node to <paramref name="color"/>.
+        /// <br></br>
+        /// This method does nothing if <paramref name="node"/> is null.
+        /// </summary>
+        /// <param name="node">Node to set the color of</param>
+        /// <param name="color">Color (Boolean)</param>
+        private static void SetColor(IntervalTreeNode<K, V> node, bool color)
+        {
+            if (node != null)
+            {
+                node.Color = color;
+            }
+        }
+
+        /// <summary>
+        /// This method returns the left node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
+        /// </summary>
+        /// <param name="node">Node to retrieve the left child from</param>
+        /// <returns>Left child of <paramref name="node"/></returns>
+        private static IntervalTreeNode<K, V> LeftOf(IntervalTreeNode<K, V> node)
+        {
+            return node?.Left;
+        }
+
+        /// <summary>
+        /// This method returns the right node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
+        /// </summary>
+        /// <param name="node">Node to retrieve the right child from</param>
+        /// <returns>Right child of <paramref name="node"/></returns>
+        private static IntervalTreeNode<K, V> RightOf(IntervalTreeNode<K, V> node)
+        {
+            return node?.Right;
+        }
+
+        /// <summary>
+        /// Returns the parent node of <paramref name="node"/>, or null if <paramref name="node"/> is null.
+        /// </summary>
+        /// <param name="node">Node to retrieve the parent from</param>
+        /// <returns>Parent of <paramref name="node"/></returns>
+        private static IntervalTreeNode<K, V> ParentOf(IntervalTreeNode<K, V> node)
+        {
+            return node?.Parent;
+        }
+
+        #endregion
+
+        public bool ContainsKey(K key)
+        {
+            return GetNode(key) != null;
+        }
+
+        public void Clear()
+        {
+            _root = null;
+            _count = 0;
+        }
+    }
+
+    /// <summary>
+    /// Represents a node in the IntervalTree which contains start and end keys of type K, and a value of generic type V.
+    /// </summary>
+    /// <typeparam name="K">Key type of the node</typeparam>
+    /// <typeparam name="V">Value type of the node</typeparam>
+    internal class IntervalTreeNode<K, V>
+    {
+        internal bool Color = true;
+        internal IntervalTreeNode<K, V> Left = null;
+        internal IntervalTreeNode<K, V> Right = null;
+        internal IntervalTreeNode<K, V> Parent = null;
+
+        /// <summary>
+        /// The start of the range.
+        /// </summary>
+        internal K Start;
+
+        /// <summary>
+        /// The end of the range.
+        /// </summary>
+        internal K End;
+
+        /// <summary>
+        /// The maximum end value of this node and all its children.
+        /// </summary>
+        internal K Max;
+
+        /// <summary>
+        /// Value stored on this node.
+        /// </summary>
+        internal V Value;
+
+        public IntervalTreeNode(K start, K end, V value, IntervalTreeNode<K, V> parent)
+        {
+            this.Start = start;
+            this.End = end;
+            this.Max = end;
+            this.Value = value;
+            this.Parent = parent;
+        }
+    }
+}

ARMeilleure/Translation/PTC/Ptc.cs

@@ -585,7 +585,7 @@ namespace ARMeilleure.Translation.PTC
 
                     translator.RegisterFunction(infoEntry.Address, func);
 
-                    bool isAddressUnique = translator.Functions.TryAdd(infoEntry.Address, func);
+                    bool isAddressUnique = translator.Functions.TryAdd(infoEntry.Address, infoEntry.GuestSize, func);
 
                     Debug.Assert(isAddressUnique, $"The address 0x{infoEntry.Address:X16} is not unique.");
                 }
@@ -815,7 +815,7 @@ namespace ARMeilleure.Translation.PTC
 
                     TranslatedFunction func = translator.Translate(address, item.funcProfile.Mode, item.funcProfile.HighCq);
 
-                    bool isAddressUnique = translator.Functions.TryAdd(address, func);
+                    bool isAddressUnique = translator.Functions.TryAdd(address, func.GuestSize, func);
 
                     Debug.Assert(isAddressUnique, $"The address 0x{address:X16} is not unique.");
 

ARMeilleure/Translation/PTC/PtcProfiler.cs

@@ -96,7 +96,7 @@ namespace ARMeilleure.Translation.PTC
             return address >= StaticCodeStart && address < StaticCodeStart + StaticCodeSize;
         }
 
-        internal static ConcurrentQueue<(ulong address, FuncProfile funcProfile)> GetProfiledFuncsToTranslate(ConcurrentDictionary<ulong, TranslatedFunction> funcs)
+        internal static ConcurrentQueue<(ulong address, FuncProfile funcProfile)> GetProfiledFuncsToTranslate(TranslatorCache<TranslatedFunction> funcs)
         {
             var profiledFuncsToTranslate = new ConcurrentQueue<(ulong address, FuncProfile funcProfile)>();
 

ARMeilleure/Translation/Translator.cs

@@ -49,7 +49,7 @@ namespace ARMeilleure.Translation
         private readonly AutoResetEvent _backgroundTranslatorEvent;
         private readonly ReaderWriterLock _backgroundTranslatorLock;
 
-        internal ConcurrentDictionary<ulong, TranslatedFunction> Functions { get; }
+        internal TranslatorCache<TranslatedFunction> Functions { get; }
         internal AddressTable<ulong> FunctionTable { get; }
         internal EntryTable<uint> CountTable { get; }
         internal TranslatorStubs Stubs { get; }
@@ -75,7 +75,7 @@ namespace ARMeilleure.Translation
             JitCache.Initialize(allocator);
 
             CountTable = new EntryTable<uint>();
-            Functions = new ConcurrentDictionary<ulong, TranslatedFunction>();
+            Functions = new TranslatorCache<TranslatedFunction>();
             FunctionTable = new AddressTable<ulong>(for64Bits ? Levels64Bit : Levels32Bit);
             Stubs = new TranslatorStubs(this);
 
@@ -98,7 +98,7 @@ namespace ARMeilleure.Translation
                 {
                     TranslatedFunction func = Translate(request.Address, request.Mode, highCq: true);
 
-                    Functions.AddOrUpdate(request.Address, func, (key, oldFunc) =>
+                    Functions.AddOrUpdate(request.Address, func.GuestSize, func, (key, oldFunc) =>
                     {
                         EnqueueForDeletion(key, oldFunc);
                         return func;
@@ -196,7 +196,7 @@ namespace ARMeilleure.Translation
             }
         }
 
-        public ulong ExecuteSingle(State.ExecutionContext context, ulong address)
+        private ulong ExecuteSingle(State.ExecutionContext context, ulong address)
         {
             TranslatedFunction func = GetOrTranslate(address, context.ExecutionMode);
 
@@ -215,7 +215,7 @@ namespace ARMeilleure.Translation
             {
                 func = Translate(address, mode, highCq: false);
 
-                TranslatedFunction oldFunc = Functions.GetOrAdd(address, func);
+                TranslatedFunction oldFunc = Functions.GetOrAdd(address, func.GuestSize, func);
 
                 if (oldFunc != func)
                 {
@@ -471,7 +471,24 @@ namespace ARMeilleure.Translation
             // If rejit is running, stop it as it may be trying to rejit a function on the invalidated region.
             ClearRejitQueue(allowRequeue: true);
 
-            // TODO: Completely remove functions overlapping the specified range from the cache.
+            ulong[] overlapAddresses = Array.Empty<ulong>();
+
+            int overlapsCount = Functions.GetOverlaps(address, size, ref overlapAddresses);
+
+            for (int index = 0; index < overlapsCount; index++)
+            {
+                ulong overlapAddress = overlapAddresses[index];
+
+                if (Functions.TryGetValue(overlapAddress, out TranslatedFunction overlap))
+                {
+                    Functions.Remove(overlapAddress);
+                    Volatile.Write(ref FunctionTable.GetValue(overlapAddress), FunctionTable.Fill);
+                    EnqueueForDeletion(overlapAddress, overlap);
+                }
+            }
+
+            // TODO: Remove overlapping functions from the JitCache aswell.
+            // This should be done safely, with a mechanism to ensure the function is not being executed.
         }
 
         internal void EnqueueForRejit(ulong guestAddress, ExecutionMode mode)
@@ -493,7 +510,9 @@ namespace ARMeilleure.Translation
             // Ensure no attempt will be made to compile new functions due to rejit.
             ClearRejitQueue(allowRequeue: false);
 
-            foreach (var func in Functions.Values)
+            List<TranslatedFunction> functions = Functions.AsList();
+
+            foreach (var func in functions)
             {
                 JitCache.Unmap(func.FuncPtr);
 

ARMeilleure/Translation/TranslatorCache.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+
+namespace ARMeilleure.Translation
+{
+    internal class TranslatorCache<T>
+    {
+        private readonly IntervalTree<ulong, T> _tree;
+        private readonly ReaderWriterLock _treeLock;
+
+        public int Count => _tree.Count;
+
+        public TranslatorCache()
+        {
+            _tree = new IntervalTree<ulong, T>();
+            _treeLock = new ReaderWriterLock();
+        }
+
+        public bool TryAdd(ulong address, ulong size, T value)
+        {
+            return AddOrUpdate(address, size, value, null);
+        }
+
+        public bool AddOrUpdate(ulong address, ulong size, T value, Func<ulong, T, T> updateFactoryCallback)
+        {
+            _treeLock.AcquireWriterLock(Timeout.Infinite);
+            bool result = _tree.AddOrUpdate(address, address + size, value, updateFactoryCallback);
+            _treeLock.ReleaseWriterLock();
+
+            return result;
+        }
+
+        public T GetOrAdd(ulong address, ulong size, T value)
+        {
+            _treeLock.AcquireWriterLock(Timeout.Infinite);
+            value = _tree.GetOrAdd(address, address + size, value);
+            _treeLock.ReleaseWriterLock();
+
+            return value;
+        }
+
+        public bool Remove(ulong address)
+        {
+            _treeLock.AcquireWriterLock(Timeout.Infinite);
+            bool removed = _tree.Remove(address) != 0;
+            _treeLock.ReleaseWriterLock();
+
+            return removed;
+        }
+
+        public void Clear()
+        {
+            _treeLock.AcquireWriterLock(Timeout.Infinite);
+            _tree.Clear();
+            _treeLock.ReleaseWriterLock();
+        }
+
+        public bool ContainsKey(ulong address)
+        {
+            _treeLock.AcquireReaderLock(Timeout.Infinite);
+            bool result = _tree.ContainsKey(address);
+            _treeLock.ReleaseReaderLock();
+
+            return result;
+        }
+
+        public bool TryGetValue(ulong address, out T value)
+        {
+            _treeLock.AcquireReaderLock(Timeout.Infinite);
+            bool result = _tree.TryGet(address, out value);
+            _treeLock.ReleaseReaderLock();
+
+            return result;
+        }
+
+        public int GetOverlaps(ulong address, ulong size, ref ulong[] overlaps)
+        {
+            _treeLock.AcquireReaderLock(Timeout.Infinite);
+            int count = _tree.Get(address, address + size, ref overlaps);
+            _treeLock.ReleaseReaderLock();
+
+            return count;
+        }
+
+        public List<T> AsList()
+        {
+            _treeLock.AcquireReaderLock(Timeout.Infinite);
+            List<T> list = _tree.AsList();
+            _treeLock.ReleaseReaderLock();
+
+            return list;
+        }
+    }
+}

Ryujinx.Cpu/CpuContext.cs

@@ -28,5 +28,10 @@ namespace Ryujinx.Cpu
         {
             _translator.Execute(context, address);
         }
+
+        public void InvalidateCacheRegion(ulong address, ulong size)
+        {
+            _translator.InvalidateJitCacheRegion(address, size);
+        }
     }
 }

Ryujinx.HLE/HOS/ArmProcessContext.cs

@@ -36,6 +36,11 @@ namespace Ryujinx.HLE.HOS
             _cpuContext.Execute(context, codeAddress);
         }
 
+        public void InvalidateCacheRegion(ulong address, ulong size)
+        {
+            _cpuContext.InvalidateCacheRegion(address, size);
+        }
+
         public void Dispose()
         {
             if (_memoryManager is IRefCounted rc)

Ryujinx.HLE/HOS/Kernel/Process/IProcessContext.cs

@@ -9,5 +9,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
         IVirtualMemoryManager AddressSpace { get; }
 
         void Execute(ExecutionContext context, ulong codeAddress);
+        void InvalidateCacheRegion(ulong address, ulong size);
     }
 }

Ryujinx.HLE/HOS/Kernel/Process/ProcessContext.cs

@@ -18,6 +18,10 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
             throw new NotSupportedException();
         }
 
+        public void InvalidateCacheRegion(ulong address, ulong size)
+        {
+        }
+
         public void Dispose()
         {
         }