Totalview

From VisItusers.org

Totalview is a visual debugger that can be used on one of four Visit processes. Run it with -totalview [engine_ser, viewer, gui, or mdserver] to debug a serial version of the engine, the viewer, gui, or metadata server.

Those familiar with totalview know that it is normally launched using totalview executable_name. Because VisIt launches several processes using a wrapper script, the wrapper script needs to be aware of totalview and have an option for launching one component under the debugger.