Deadlocks when debugging ThreadSendValues and ThreadReceiveValues

[TanYuzhen]

Hello, author.
I'm debugging ABYcore and I'm running the PerformInteraction() function when two Parties interact. However, when I debug with gdb, I use the gdb command set schedule-locking on for the purpose of switching to the Client for receiving after the Server performs sending. Similarly, I want the Client to send and then the Server to receive.
Unfortunately, after I do this, the program deadlocks. Can you tell me why?
Because when I debug this part, if I don't execute this gdb command, only one of the two functions ThreadSendValues() and ThreadReceiveValues() can be debugged, and even if the other one adds a breakpoint in it, it is executed immediately, and I can't catch it.
In other words, I can't properly debug both functions ThreadSendValues() and ThreadReceiveValues() in a single participant, gdb is only able to catch one function and the other is executed automatically. Can you please tell me how I can solve this problem.
Looking forward to your reply!