fix: improve class search for super call (#1512)

jadx-core/src/main/java/jadx/core/clsp/ClspGraph.java

@@ -203,6 +203,9 @@ public class ClspGraph {
 				if (isNew) {
 					addSuperTypes(parentCls, result);
 				}
+			} else {
+				// parent type is unknown
+				result.add(parentType.getObject());
 			}
 		}
 	}

jadx-core/src/main/java/jadx/core/codegen/InsnGen.java

@@ -807,14 +807,9 @@ public class InsnGen {
 				break;
 
 			case SUPER:
-				ClassInfo superCallCls = getClassForSuperCall(code, callMth);
-				if (superCallCls != null) {
-					useClass(code, superCallCls);
-					code.add('.');
-				}
-				// use 'super' instead 'this' in 0 arg
-				code.add("super").add('.');
-				k++;
+				callSuper(code, callMth);
+				k++; // use 'super' instead 'this' in 0 arg
+				code.add('.');
 				break;
 
 			case STATIC:
@@ -965,34 +960,43 @@ public class InsnGen {
 		code.startLine('}');
 	}
 
-	@Nullable
-	private ClassInfo getClassForSuperCall(ICodeWriter code, MethodInfo callMth) {
-		ClassNode useCls = mth.getParentClass();
-		ClassInfo insnCls = useCls.getClassInfo();
-		ClassInfo declClass = callMth.getDeclClass();
-		if (insnCls.equals(declClass)) {
-			return null;
+	private void callSuper(ICodeWriter code, MethodInfo callMth) {
+		ClassInfo superCallCls = getClassForSuperCall(callMth);
+		if (superCallCls == null) {
+			// unknown class, add comment to keep that info
+			code.add("super/*").add(callMth.getDeclClass().getFullName()).add("*/");
+			return;
 		}
-		ClassNode topClass = useCls.getTopParentClass();
-		if (topClass.getClassInfo().equals(declClass)) {
-			return declClass;
+		ClassInfo curClass = mth.getParentClass().getClassInfo();
+		if (superCallCls.equals(curClass)) {
+			code.add("super");
+			return;
 		}
-		// search call class
-		ClassNode nextParent = useCls;
-		do {
-			ClassInfo nextClsInfo = nextParent.getClassInfo();
-			if (nextClsInfo.equals(declClass)
-					|| ArgType.isInstanceOf(mth.root(), nextClsInfo.getType(), declClass.getType())) {
-				if (nextParent == useCls) {
-					return null;
-				}
-				return nextClsInfo;
-			}
-			nextParent = nextParent.getParentClass();
-		} while (nextParent != null && nextParent != topClass);
+		// use custom class
+		useClass(code, superCallCls);
+		code.add(".super");
+	}
 
-		// search failed, just return parent class
-		return useCls.getParentClass().getClassInfo();
+	/**
+	 * Search call class in super types of this
+	 * and all parent classes (needed for inlined synthetic calls)
+	 */
+	@Nullable
+	private ClassInfo getClassForSuperCall(MethodInfo callMth) {
+		ArgType declClsType = callMth.getDeclClass().getType();
+		ClassNode parentNode = mth.getParentClass();
+		while (true) {
+			ClassInfo parentCls = parentNode.getClassInfo();
+			if (ArgType.isInstanceOf(root, parentCls.getType(), declClsType)) {
+				return parentCls;
+			}
+			ClassNode nextParent = parentNode.getParentClass();
+			if (nextParent == parentNode) {
+				// no parent, class not found
+				return null;
+			}
+			parentNode = nextParent;
+		}
 	}
 
 	void generateMethodArguments(ICodeWriter code, BaseInvokeNode insn, int startArgNum,

jadx-core/src/test/java/jadx/tests/api/compiler/TestCompiler.java

@@ -11,7 +11,6 @@ import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Locale;
 
 import javax.tools.DiagnosticListener;
 import javax.tools.JavaCompiler;
@@ -82,7 +81,7 @@ public class TestCompiler implements Closeable {
 		arguments.addAll(options.getArguments());
 
 		DiagnosticListener<? super JavaFileObject> diagnostic =
-				diagObj -> System.out.println("Compiler diagnostic: " + diagObj.getMessage(Locale.ROOT));
+				diagObj -> System.out.println("Compiler diagnostic: " + diagObj);
 		Writer out = new PrintWriter(System.out);
 		CompilationTask compilerTask = compiler.getTask(out, fileManager, diagnostic, arguments, null, jfObjects);
 		if (Boolean.FALSE.equals(compilerTask.call())) {

jadx-core/src/test/java/jadx/tests/integration/invoke/TestSuperInvokeUnknown.java

@@ -0,0 +1,42 @@
+package jadx.tests.integration.invoke;
+
+import org.junit.jupiter.api.Test;
+
+import jadx.tests.api.IntegrationTest;
+
+import static jadx.tests.api.utils.assertj.JadxAssertions.assertThat;
+
+public class TestSuperInvokeUnknown extends IntegrationTest {
+
+	public static class TestCls {
+		public static class BaseClass {
+			public int doSomething() {
+				return 0;
+			}
+		}
+
+		public static class NestedClass extends BaseClass {
+			@Override
+			public int doSomething() {
+				return super.doSomething();
+			}
+		}
+	}
+
+	@Test
+	public void test() {
+		disableCompilation();
+		noDebugInfo();
+		assertThat(getClassNode(TestCls.NestedClass.class)) // BaseClass unknown
+				.code()
+				.containsOne("return super.doSomething();");
+	}
+
+	@Test
+	public void testTopCls() {
+		noDebugInfo();
+		assertThat(getClassNode(TestCls.class))
+				.code()
+				.containsOne("return super.doSomething();");
+	}
+}