In the following commands, a missing tid implies the current thread.
Print everything known about the given thread:
thread -info tid
Hide or unhide the given (or current) thread. It will or will not show up in the generic threads listing:
thread [-hide | -unhide] tid
thread -unhide all
Keep the given thread from ever running. A suspended thread shows up with an S in the threads list:
thread -suspend tid
thread -resume tid