When you are using dbx to debug a mixture of Java and native code, dbx commands fall into several categories:
Commands that accept the same arguments and operate the same way in Java mode or JNI mode as in native mode. See Commands With Identical Syntax and Functionality in Java Mode and Native Mode.
Commands that have arguments that are valid only in Java mode or JNI mode, as well as arguments that are valid only in native mode. See Commands With Different Syntax in Java Mode.
Commands that are valid only in Java mode or JNI mode. See Commands Valid Only in Java Mode.
Any commands not included in one of these categories work only in native mode.