4.4 Controlling and Monitoring Program Execution
  This section discusses the following:

  .
        Starting and resuming program execution with the GO
        command
  .
        Stepping through the program's code with the STEP
        command
  .
        Determining the current location of the program counter
        (PC) with the SHOW CALLS command
  .
        Suspending program execution with breakpoints
  .
        Tracing program execution with tracepoints
  .
        Monitoring changes in variables with watchpoints