Nothing specifically out-of-the-box. When you're about to step over some Handler.send/post-like code, the debugger will not automatically set a breakpoint on the handler target routine. I.e., you'd be stepping over the call and end up on the next instruction. Meanwhile, the handler code may have executed, depending on whether or not the other threads are suspended or running (they should be suspended).
If you wanted to auto-break inside the handler code in the other thread, you could write a script to do just that, that is:
- find the target handler class, and locate its handleMessage() function
- set a bp on in
- also set a bp on the code that follows the
Handler.send/post, because it may be hit first
- proceed - your handler bp should be hit at some point
(Unrelated, but you should join the Slack channel, see my signature below)