From dcdbe25a0f6763be4471f88227f9b0952501050c Mon Sep 17 00:00:00 2001
From: de4dot <de4dot@gmail.com>
Date: Sat, 1 Dec 2012 02:22:59 +0100
Subject: [PATCH] Add option to disable creating new ParamDefs when renaming

---
 de4dot.code/renamer/Renamer.cs  | 7 ++++++-
 de4dot.cui/CommandLineParser.cs | 3 +++
 de4dot.cui/FilesDeobfuscator.cs | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/de4dot.code/renamer/Renamer.cs b/de4dot.code/renamer/Renamer.cs
index a26c1945..753138a2 100644
--- a/de4dot.code/renamer/Renamer.cs
+++ b/de4dot.code/renamer/Renamer.cs
@@ -39,6 +39,7 @@ namespace de4dot.code.renamer {
 		public bool RestorePropertiesFromNames { get; set; }
 		public bool RestoreEvents { get; set; }
 		public bool RestoreEventsFromNames { get; set; }
+		public bool DontCreateNewParamDefs { get; set; }
 
 		Modules modules;
 		MemberInfos memberInfos = new MemberInfos();
@@ -321,7 +322,11 @@ namespace de4dot.code.renamer {
 						var paramInfo = memberInfos.param(param);
 						if (!paramInfo.gotNewName())
 							continue;
-						param.ParameterDef.CreateParamDef();
+						if (!param.ParameterDef.HasParamDef) {
+							if (DontCreateNewParamDefs)
+								continue;
+							param.ParameterDef.CreateParamDef();
+						}
 						param.ParameterDef.Name = paramInfo.newName;
 						if (isVerbose) {
 							if (param.IsReturnParameter)
diff --git a/de4dot.cui/CommandLineParser.cs b/de4dot.cui/CommandLineParser.cs
index a5134dce..493cf8eb 100644
--- a/de4dot.cui/CommandLineParser.cs
+++ b/de4dot.cui/CommandLineParser.cs
@@ -135,6 +135,9 @@ namespace de4dot.cui {
 					}
 				}
 			}));
+			miscOptions.Add(new NoArgOption(null, "dont-create-params", "Don't create method params when renaming", () => {
+				filesOptions.DontCreateNewParamDefs = true;
+			}));
 			miscOptions.Add(new NoArgOption(null, "dont-restore-props", "Don't restore properties/events", () => {
 				filesOptions.RestorePropsEvents = false;
 			}));
diff --git a/de4dot.cui/FilesDeobfuscator.cs b/de4dot.cui/FilesDeobfuscator.cs
index 972a60a9..03a511c3 100644
--- a/de4dot.cui/FilesDeobfuscator.cs
+++ b/de4dot.cui/FilesDeobfuscator.cs
@@ -38,6 +38,7 @@ namespace de4dot.cui {
 			public IList<IObfuscatedFile> Files { get; set; }
 			public IList<SearchDir> SearchDirs { get; set; }
 			public bool DetectObfuscators { get; set; }
+			public bool DontCreateNewParamDefs { get; set; }
 			public bool RenameNamespaces { get; set; }
 			public bool RenameTypes { get; set; }
 			public bool RenameProperties { get; set; }
@@ -385,6 +386,7 @@ namespace de4dot.cui {
 			if (!options.RenameSymbols)
 				return;
 			var renamer = new Renamer(deobfuscatorContext, theFiles) {
+				DontCreateNewParamDefs = options.DontCreateNewParamDefs,
 				RenameNamespaces = options.RenameNamespaces,
 				RenameTypes = options.RenameTypes,
 				RenameProperties = options.RenameProperties,