Mono: Implement stack info for errors and exceptions

modules/mono/glue/cs_files/DebuggingUtils.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Diagnostics;
+using System.Reflection;
+using System.Text;
+
+namespace Godot
+{
+    internal static class DebuggingUtils
+    {
+        internal static void AppendTypeName(this StringBuilder sb, Type type)
+        {
+            if (type.IsPrimitive)
+                sb.Append(type.Name);
+            else if (type == typeof(void))
+                sb.Append("void");
+            else
+                sb.Append(type.ToString());
+
+            sb.Append(" ");
+        }
+
+        public static void GetStackFrameInfo(StackFrame frame, out string fileName, out int fileLineNumber, out string methodDecl)
+        {
+            fileName = frame.GetFileName();
+            fileLineNumber = frame.GetFileLineNumber();
+
+            MethodBase methodBase = frame.GetMethod();
+
+            StringBuilder sb = new StringBuilder();
+
+            if (methodBase is MethodInfo methodInfo)
+                sb.AppendTypeName(methodInfo.ReturnType);
+
+            sb.Append(methodBase.DeclaringType.FullName);
+            sb.Append(".");
+            sb.Append(methodBase.Name);
+
+            if (methodBase.IsGenericMethod)
+            {
+                Type[] genericParams = methodBase.GetGenericArguments();
+
+                sb.Append("<");
+
+                for (int j = 0; j < genericParams.Length; j++)
+                {
+                    if (j > 0)
+                        sb.Append(", ");
+
+                    sb.AppendTypeName(genericParams[j]);
+                }
+
+                sb.Append(">");
+            }
+
+            sb.Append("(");
+
+            bool varArgs = (methodBase.CallingConvention & CallingConventions.VarArgs) != 0;
+
+            ParameterInfo[] parameter = methodBase.GetParameters();
+
+            for (int i = 0; i < parameter.Length; i++)
+            {
+                if (i > 0)
+                    sb.Append(", ");
+
+                if (i == parameter.Length - 1 && varArgs)
+                    sb.Append("params ");
+
+                sb.AppendTypeName(parameter[i].ParameterType);
+            }
+
+            sb.Append(")");
+
+            methodDecl = sb.ToString();
+        }
+    }
+}