Put a breakpoint on every line in Eclipse?

Question

Is there a way to put a breakpoint on every line in Eclipse?

The reason I ask is because I am analyzing a proxy program written in Java, which waits and listens for connections. I'm trying to follow how it works, but I can't figure out where the code starts from when a connection arrives.

How can I trigger a breakpoint no matter where the code starts from, in other words, breakpoint every line?

Answer 1

I can't think of a reason you'd want a breakpoint on every line. It would be equivalent to simply putting a breakpoint at the first line of main(), then stepping through your program with step into -- not something a sane person would normally want to do with a large program.

I would suggest:

1. Delete or disable any breakpoints you have already
2. Start your proxy in debug mode; allow it to initialise. It is now listening.
3. Hit the "pause" button in the debug controls. You might have to select the right thread to pause -- experiment.
4. Look at the stack display, this will show you where it's paused. It will probably be paused in a library class - follow the stack up to your own code.

If you like, you can now connect to your proxy with a client, and use the debug step controls to watch how the code handles it. One problem with this is that things time out while you're looking at steps, so it can be useful to set longer timeouts where possible.