Add multi-pass Transformer support

asm/src/main/java/dev/openrs2/asm/transform/Transformer.java

@@ -11,23 +11,28 @@ public abstract class Transformer {
 	public void transform(ClassPath classPath) throws AnalyzerException {
 		preTransform(classPath);
 
+		boolean changed;
+		do {
+			changed = false;
+
 			for (var library : classPath.getLibraries()) {
 				for (var clazz : library) {
-				transformClass(clazz);
+					changed |= transformClass(clazz);
 
 					for (var field : clazz.fields) {
-					transformField(clazz, field);
+						changed |= transformField(clazz, field);
 					}
 
 					for (var method : clazz.methods) {
-					transformMethod(clazz, method);
+						changed |= transformMethod(clazz, method);
 
 						if ((method.access & (Opcodes.ACC_NATIVE | Opcodes.ACC_ABSTRACT)) == 0) {
-						transformCode(clazz, method);
+							changed |= transformCode(clazz, method);
 						}
 					}
 				}
 			}
+		} while (changed);
 
 		postTransform(classPath);
 	}
@@ -36,20 +41,20 @@ public abstract class Transformer {
 		/* empty */
 	}
 
-	public void transformClass(ClassNode clazz) throws AnalyzerException {
-		/* empty */
+	public boolean transformClass(ClassNode clazz) throws AnalyzerException {
+		return false;
 	}
 
-	public void transformField(ClassNode clazz, FieldNode field) throws AnalyzerException {
-		/* empty */
+	public boolean transformField(ClassNode clazz, FieldNode field) throws AnalyzerException {
+		return false;
 	}
 
-	public void transformMethod(ClassNode clazz, MethodNode method) throws AnalyzerException {
-		/* empty */
+	public boolean transformMethod(ClassNode clazz, MethodNode method) throws AnalyzerException {
+		return false;
 	}
 
-	public void transformCode(ClassNode clazz, MethodNode method) throws AnalyzerException {
-		/* empty */
+	public boolean transformCode(ClassNode clazz, MethodNode method) throws AnalyzerException {
+		return false;
 	}
 
 	public void postTransform(ClassPath classPath) throws AnalyzerException {

deob/src/main/java/dev/openrs2/deob/transform/BitShiftTransformer.java

@@ -26,7 +26,7 @@ public final class BitShiftTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformCode(ClassNode clazz, MethodNode method) {
+	public boolean transformCode(ClassNode clazz, MethodNode method) {
 		CONST_SHIFT_MATCHER.match(method).forEach(match -> {
 			var push = match.get(0);
 			var bits = InsnNodeUtils.getIntConstant(push);
@@ -39,6 +39,8 @@ public final class BitShiftTransformer extends Transformer {
 				simplified++;
 			}
 		});
+
+		return false;
 	}
 
 	@Override

deob/src/main/java/dev/openrs2/deob/transform/CanvasTransformer.java

@@ -6,15 +6,17 @@ import org.objectweb.asm.tree.ClassNode;
 
 public final class CanvasTransformer extends Transformer {
 	@Override
-	public void transformClass(ClassNode clazz) {
+	public boolean transformClass(ClassNode clazz) {
 		if (!"java/awt/Canvas".equals(clazz.superName)) {
-			return;
+			return false;
 		}
 
 		if ((clazz.access & Opcodes.ACC_FINAL) == 0) {
-			return;
+			return false;
 		}
 
 		clazz.interfaces.remove("java/awt/event/FocusListener");
+
+		return false;
 	}
 }

deob/src/main/java/dev/openrs2/deob/transform/ClassForNameTransformer.java

@@ -33,7 +33,7 @@ public final class ClassForNameTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformCode(ClassNode clazz, MethodNode method) {
+	public boolean transformCode(ClassNode clazz, MethodNode method) {
 		INVOKE_MATCHER.match(method).filter(ClassForNameTransformer::isClassForName).forEach(match -> {
 			var ldc = (LdcInsnNode) match.get(0);
 			var name = remapper.map((String) ldc.cst);
@@ -41,5 +41,7 @@ public final class ClassForNameTransformer extends Transformer {
 				ldc.cst = name;
 			}
 		});
+
+		return false;
 	}
 }

deob/src/main/java/dev/openrs2/deob/transform/CounterTransformer.java

@@ -94,7 +94,7 @@ public final class CounterTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformCode(ClassNode clazz, MethodNode method) {
+	public boolean transformCode(ClassNode clazz, MethodNode method) {
 		RESET_PATTERN.match(method).forEach(match -> {
 			var putstatic = (FieldInsnNode) match.get(1);
 			if (counters.contains(new MemberRef(putstatic.owner, putstatic.name, putstatic.desc))) {
@@ -111,6 +111,8 @@ public final class CounterTransformer extends Transformer {
 				match.forEach(method.instructions::remove);
 			}
 		});
+
+		return false;
 	}
 
 	@Override

deob/src/main/java/dev/openrs2/deob/transform/ExceptionTracingTransformer.java

@@ -22,7 +22,7 @@ public final class ExceptionTracingTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformCode(ClassNode clazz, MethodNode method) {
+	public boolean transformCode(ClassNode clazz, MethodNode method) {
 		CATCH_MATCHER.match(method).forEach(match -> {
 			var foundTryCatch = method.tryCatchBlocks.removeIf(tryCatch -> {
 				if (!"java/lang/RuntimeException".equals(tryCatch.type)) {
@@ -36,6 +36,8 @@ public final class ExceptionTracingTransformer extends Transformer {
 				tracingTryCatches++;
 			}
 		});
+
+		return false;
 	}
 
 	@Override

deob/src/main/java/dev/openrs2/deob/transform/FieldOrderTransformer.java

@@ -45,8 +45,9 @@ public final class FieldOrderTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformClass(ClassNode clazz) {
+	public boolean transformClass(ClassNode clazz) {
 		sortFields(clazz, CONSTRUCTOR, Opcodes.PUTFIELD);
 		sortFields(clazz, STATIC_CONSTRUCTOR, Opcodes.PUTSTATIC);
+		return false;
 	}
 }

deob/src/main/java/dev/openrs2/deob/transform/OpaquePredicateTransformer.java

@@ -91,7 +91,7 @@ public final class OpaquePredicateTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformCode(ClassNode clazz, MethodNode method) {
+	public boolean transformCode(ClassNode clazz, MethodNode method) {
 		/* find and fix opaque predicates */
 		OPAQUE_PREDICATE_MATCHER.match(method).filter(match -> isOpaquePredicate(method, match)).forEach(match -> {
 			var branch = (JumpInsnNode) match.get(1);
@@ -113,6 +113,8 @@ public final class OpaquePredicateTransformer extends Transformer {
 			match.forEach(method.instructions::remove);
 			stores++;
 		});
+
+		return false;
 	}
 
 	@Override

deob/src/main/java/dev/openrs2/deob/transform/OriginalNameTransformer.java

@@ -37,26 +37,30 @@ public final class OriginalNameTransformer extends Transformer {
 	}
 
 	@Override
-	public void transformClass(ClassNode clazz) {
+	public boolean transformClass(ClassNode clazz) {
 		if (clazz.invisibleAnnotations == null) {
 			clazz.invisibleAnnotations = new ArrayList<>();
 		}
 		clazz.invisibleAnnotations.add(createOriginalClassAnnotation(clazz.name));
+
+		return false;
 	}
 
 	@Override
-	public void transformField(ClassNode clazz, FieldNode field) {
+	public boolean transformField(ClassNode clazz, FieldNode field) {
 		if (field.invisibleAnnotations == null) {
 			field.invisibleAnnotations = new ArrayList<>();
 		}
 		field.invisibleAnnotations.add(createOriginalMemberAnnotation(clazz.name, field.name, field.desc));
+
+		return false;
 	}
 
 	@SuppressWarnings("unchecked")
 	@Override
-	public void transformMethod(ClassNode clazz, MethodNode method) {
+	public boolean transformMethod(ClassNode clazz, MethodNode method) {
 		if (method.name.equals("<init>") || method.name.equals("<clinit>")) {
-			return;
+			return false;
 		}
 
 		if (method.invisibleAnnotations == null) {
@@ -75,5 +79,7 @@ public final class OriginalNameTransformer extends Transformer {
 			}
 			annotations.add(createOriginalArgAnnotation(i));
 		}
+
+		return false;
 	}
 }