Add tracing output

gistfile1.cs

using System;
using Mono.Cecil;
using Mono.Cecil.Cil;
using System.Reflection;

namespace ch.fangorn.LUI.AddTrace
{
	class MainClass
	{
		public static bool verbose = false;
		
		public static void Main (string[] args)
		{
			//Gets the MethodInfo of Console.WriteLine() method
			MethodInfo writeLineMethod = 
				typeof(Console).GetMethod("WriteLine", new Type[]{typeof(string)});
			
			if (args.Length < 3) {
				Console.WriteLine ("addTrace input output libsDir [/v]");
				Console.WriteLine ("   /v    verbose");
				return;
			}
			string assemblyName = args [0];
			string output = args [1];
			string libs = args [2];
			((DefaultAssemblyResolver)GlobalAssemblyResolver.Instance).AddSearchDirectory (libs);
			
			if (args.Length > 3) {
				verbose = args [3] == "/v";
			}

			ModuleDefinition module = ModuleDefinition.ReadModule (assemblyName);
			MethodReference writeLineRef =  module.Import(writeLineMethod);
			
			//Gets all types of the MainModule of the assembly
			foreach (TypeDefinition type in module.Types) {
				if (type.Name != "<Module>") {
					//Gets all methods of the current type
					foreach (MethodDefinition method in type.Methods) {
						string traceOutput = "t " + method.FullName;
						Instruction ldstr = Instruction.Create(OpCodes.Ldstr, traceOutput);
						Instruction writeTrace = Instruction.Create(OpCodes.Call, writeLineRef);
						if(method.HasBody) {
							method.Body.Instructions.Insert(0, writeTrace);
							method.Body.Instructions.Insert(0, ldstr);
						}
					}
				}
			}
			module.Write (output);	
		}
	}
}