Dispose() of all modules we don't need

de4dot.code/AssemblyModule.cs

@@ -44,6 +44,8 @@ namespace de4dot.code {
 		}
 
 		ModuleDefMD setModule(ModuleDefMD newModule) {
+			if (module != null)
+				module.Dispose();
 			module = newModule;
 			TheAssemblyResolver.Instance.addModule(module);
 			module.EnableTypeDefFindCache = true;

de4dot.code/IObfuscatedFile.cs

@@ -17,13 +17,14 @@
     along with de4dot.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+using System;
 using System.Collections.Generic;
 using de4dot.code.deobfuscators;
 using dot10.DotNet;
 using de4dot.code.renamer;
 
 namespace de4dot.code {
-	public interface IObfuscatedFile {
+	public interface IObfuscatedFile : IDisposable {
 		ModuleDefMD ModuleDefMD { get; }
 		IDeobfuscator Deobfuscator { get; }
 		IDeobfuscatorContext DeobfuscatorContext { get; set; }

de4dot.code/ObfuscatedFile.cs

@@ -778,5 +778,13 @@ namespace de4dot.code {
 		void IDeobfuscatedFile.setDeobfuscator(IDeobfuscator deob) {
 			this.deob = deob;
 		}
+
+		public void Dispose() {
+			deobfuscateCleanUp();
+			if (module != null)
+				module.Dispose();
+			module = null;
+			deob = null;
+		}
 	}
 }

de4dot.cui/FilesDeobfuscator.cs

@@ -85,6 +85,7 @@ namespace de4dot.cui {
 		void detectObfuscators() {
 			foreach (var file in loadAllFiles(true)) {
 				removeModule(file.ModuleDefMD);
+				file.Dispose();
 				deobfuscatorContext.clear();
 			}
 		}
@@ -108,7 +109,7 @@ namespace de4dot.cui {
 					Program.printStackTrace(ex, LoggerEvent.Verbose);
 				}
 				finally {
-					file.deobfuscateCleanUp();
+					file.Dispose();
 					Logger.Instance.IndentLevel = oldIndentLevel;
 				}
 			}
@@ -116,9 +117,17 @@ namespace de4dot.cui {
 
 		void deobfuscateAll() {
 			var allFiles = new List<IObfuscatedFile>(loadAllFiles());
-			deobfuscateAllFiles(allFiles);
-			rename(allFiles);
-			saveAllFiles(allFiles);
+			try {
+				deobfuscateAllFiles(allFiles);
+				rename(allFiles);
+				saveAllFiles(allFiles);
+			}
+			finally {
+				foreach (var file in allFiles) {
+					if (file != null)
+						file.Dispose();
+				}
+			}
 		}
 
 		IEnumerable<IObfuscatedFile> loadAllFiles() {
@@ -310,6 +319,7 @@ namespace de4dot.cui {
 				var obfuscatedFile = new ObfuscatedFile(fileOptions, options.ModuleContext, options.AssemblyClientFactory);
 				if (add(obfuscatedFile, searchDir.SkipUnknownObfuscators, false))
 					return obfuscatedFile;
+				obfuscatedFile.Dispose();
 				return null;
 			}