接入obfuz->2.0

UnityProject/Packages/com.code-philosophy.hybridclr/Editor/AOT/AOTAssemblyMetadataStripper.cs

@@ -0,0 +1,56 @@
+using dnlib.DotNet;
+using dnlib.DotNet.Writer;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HybridCLR.Editor.AOT
+{
+    public class AOTAssemblyMetadataStripper
+    {
+        public static byte[] Strip(byte[] assemblyBytes)
+        {
+            var context = ModuleDef.CreateModuleContext();
+            var readerOption = new ModuleCreationOptions(context)
+            {
+                Runtime = CLRRuntimeReaderKind.Mono
+            };
+            var mod = ModuleDefMD.Load(assemblyBytes, readerOption);
+            // remove all resources
+            mod.Resources.Clear();
+            foreach (var type in mod.GetTypes())
+            {
+                if (type.HasGenericParameters)
+                {
+                    continue;
+                }
+                foreach (var method in type.Methods)
+                {
+                    if (!method.HasBody || method.HasGenericParameters)
+                    {
+                        continue;
+                    }
+                    method.Body = null;
+                }
+            }
+            var writer = new System.IO.MemoryStream();
+            var options = new ModuleWriterOptions(mod);
+            options.MetadataOptions.Flags |= MetadataFlags.PreserveRids;
+            mod.Write(writer, options);
+            writer.Flush();
+            return writer.ToArray();
+        }
+
+        public static void Strip(string originalAssemblyPath, string strippedAssemblyPath)
+        {
+            byte[] originDllBytes = System.IO.File.ReadAllBytes(originalAssemblyPath);
+            byte[] strippedDllBytes = Strip(originDllBytes);
+            UnityEngine.Debug.Log($"aot dll:{originalAssemblyPath}, length: {originDllBytes.Length} -> {strippedDllBytes.Length}, stripping rate:{(originDllBytes.Length - strippedDllBytes.Length)/(double)originDllBytes.Length} ");
+            Directory.CreateDirectory(System.IO.Path.GetDirectoryName(strippedAssemblyPath));
+            System.IO.File.WriteAllBytes(strippedAssemblyPath, strippedDllBytes);
+        }
+    }
+}