Fix unaligned accesses

src/Avalonia.Base/Rendering/Composition/Transport/BatchStream.cs

@@ -72,7 +72,7 @@ internal class BatchStreamWriter : IDisposable
         var size = Unsafe.SizeOf<T>();
         if (_currentDataSegment.Data == IntPtr.Zero || _currentDataSegment.ElementCount + size > _memoryPool.BufferSize)
             NextDataSegment();
-        *(T*)((byte*)_currentDataSegment.Data + _currentDataSegment.ElementCount) = item;
+        Unsafe.WriteUnaligned<T>((byte*)_currentDataSegment.Data + _currentDataSegment.ElementCount, item);
         _currentDataSegment.ElementCount += size;
     }
 
@@ -123,7 +123,7 @@ internal class BatchStreamReader : IDisposable
         if (_memoryOffset + size > _currentDataSegment.ElementCount)
             throw new InvalidOperationException("Attempted to read more memory then left in the current segment");
 
-        var rv = *(T*)((byte*)_currentDataSegment.Data + _memoryOffset);
+        var rv = Unsafe.ReadUnaligned<T>((byte*)_currentDataSegment.Data + _memoryOffset);
         _memoryOffset += size;
         if (_memoryOffset == _currentDataSegment.ElementCount)
         {
@@ -181,4 +181,4 @@ internal class BatchStreamReader : IDisposable
         while (_input.Objects.Count > 0)
             _objectPool.Return(_input.Objects.Dequeue().Data);
     }
-}
+}

src/Avalonia.X11/X11Structs.cs

@@ -32,6 +32,7 @@ using System.Collections;
 using System.Drawing;
 using System.Diagnostics;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 // ReSharper disable FieldCanBeMadeReadOnly.Global
 // ReSharper disable IdentifierTypo
@@ -545,7 +546,7 @@ namespace Avalonia.X11 {
         {
             if (data == null)
                 throw new InvalidOperationException();
-            return *(T*)data;
+            return Unsafe.ReadUnaligned<T>(data);
         }
     }