Embedded OSs with multiple intercommunicating processes commonly implement interprocess communication (IPC) and synchronization algorithms based upon one or some combination of memory sharing, message ...

So operating systems like Linux provide IPC — interprocess communications. Just like you make some parts of an object public, you can expose certain things in your program to other programs.

Through MULTI, programmers can set process-specific and address-space-wide breakpoints, and monitor/record I/O and interprocess communications. They can also perform execution profiling at the process ...