Add startup agents warning

Co-authored-by: topjohnwu <topjohnwu@gmail.com>

core/proguard-rules.pro

@@ -24,11 +24,10 @@
 -assumenosideeffects class com.topjohnwu.superuser.internal.Utils {
 	public static void log(...);
 	public static void ex(...);
-}
--assumevalues class com.topjohnwu.superuser.internal.Utils {
 	public static boolean vLog() return false;
+	public static boolean hasStartupAgents(android.content.Context) return false;
 }
--assumevalues class android.os.Debug {
+-assumenosideeffects class android.os.Debug {
 	public static boolean isDebuggerConnected() return false;
 }
 

core/src/main/java/com/topjohnwu/superuser/internal/Utils.java

@@ -108,6 +108,13 @@ public final class Utils {
         return context;
     }
 
+    public static boolean hasStartupAgents(Context context) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R)
+            return false;
+        File agents = new File(context.getCodeCacheDir(), "startup_agents");
+        return agents.isDirectory();
+    }
+
     public static boolean isSynchronized(Collection<?> collection) {
         if (synchronizedCollectionClass == null) {
             synchronizedCollectionClass =

service/src/main/java/com/topjohnwu/superuser/internal/RootServiceManager.java

@@ -39,6 +39,7 @@ import android.os.Messenger;
 import android.os.Process;
 import android.os.RemoteException;
 import android.util.ArrayMap;
+import android.util.Log;
 import android.util.Pair;
 
 import androidx.annotation.NonNull;
@@ -80,6 +81,13 @@ public class RootServiceManager implements Handler.Callback {
     private static final String API_28_DEBUG =
             "-XjdwpProvider:adbconnection -XjdwpOptions:suspend=n,server=y " +
             "-Xcompiler-option --debuggable";
+    private static final String JVMTI_ERROR = " \n" +
+            "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n" +
+            "! Warning: JVMTI agent is enabled. Please enable the !\n" +
+            "! 'Always install with package manager' option in    !\n" +
+            "! Android Studio. For more details and information,  !\n" +
+            "! check out RootService's Javadoc.                   !\n" +
+            "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n";
 
     private static final int REMOTE_EN_ROUTE = 1 << 0;
     private static final int DAEMON_EN_ROUTE = 1 << 1;
@@ -141,6 +149,11 @@ public class RootServiceManager implements Handler.Callback {
 
     private Shell.Task startRootProcess(ComponentName name, String action) {
         Context context = Utils.getContext();
+
+        if (Utils.hasStartupAgents(context)) {
+            Log.e(TAG, JVMTI_ERROR);
+        }
+
         if (filterAction == null) {
             filterAction = UUID.randomUUID().toString();
             // Register receiver to receive binder from root process

service/src/main/java/com/topjohnwu/superuser/ipc/RootService.java

@@ -41,9 +41,9 @@ import java.util.concurrent.Executor;
 /**
  * A remote root service using native Android Binder IPC.
  * <p>
- * Pro tip: while developing an app with RootServices, modify the run/debug configuration and check
- * the "Always install with package manager" option if testing on Android 11+, or else the code
- * changes will not be reflected after Android Studio's deployment.
+ * Important: while developing an app with RootServices, modify the run/debug configuration and
+ * check the "Always install with package manager" option if testing on Android 11+, or else the
+ * code changes will not be reflected after Android Studio's deployment.
  * <p>
  * This class is almost a complete recreation of a bound service running in a root process.
  * Instead of using the original {@code Context.bindService(...)} methods to start and bind