From 59d507a17a10d03e0ef02a5f6a99d4486daf6d4a Mon Sep 17 00:00:00 2001
From: Ulysses <wdwxy12345@gmail.com>
Date: Tue, 31 Oct 2023 19:50:47 +0800
Subject: [PATCH] init `out struct` parameters to prevent
 NullReferenceReference

---
 Source/VSProj/Src/Tools/CodeTranslator.cs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Source/VSProj/Src/Tools/CodeTranslator.cs b/Source/VSProj/Src/Tools/CodeTranslator.cs
index 104bc51..0020c55 100644
--- a/Source/VSProj/Src/Tools/CodeTranslator.cs
+++ b/Source/VSProj/Src/Tools/CodeTranslator.cs
@@ -1261,6 +1261,26 @@ unsafe MethodIdInfo getMethodId(MethodReference callee, MethodDefinition caller,
                     }
                 }
 
+                //修复out struct问题
+                for (int i = 0; i < method.Parameters.Count; i++)
+                {
+                    var parameter = method.Parameters[i];
+                    if (parameter.IsOut && parameter.ParameterType.GetElementType().IsValueType && !parameter.ParameterType.GetElementType().IsPrimitive)
+                    {
+                        code.Add(new Core.Instruction
+                        {
+                            Code = Core.Code.Ldarg,
+                            Operand = i + (method.HasThis ? 1 : 0)
+                        });
+                        code.Add(new Core.Instruction
+                        {
+                            Code = Core.Code.Initobj,
+                            Operand = addExternType(parameter.ParameterType.GetElementType())
+                        });
+                        offsetAdd += 2;
+                    }
+                }
+
                 if (offsetAdd > 0)
                 {
                     var ilNewOffset = new Dictionary<Instruction, int>();