Specifying Processes and Threads

A previous section said that a P/T set is a list. This ignored what the individual elements of the list are. A better definition is that a P/T set is a list of arenas, where an arena is the processes, threads, and groups that are affected by a CLI debugging command. Each arena specifier describes a single arena in which a command will act; the list is just a collection of arenas. Most commands iterate over the list, acting individually on an arena. Some output commands, however, may combine the arenas and act on them as a single target.

An arena specifier includes a width and a thread of interest. ("Widths" are discussed later in this section.) Within the P/T set, the thread of interest specifies a target thread, while the width specifies how many threads surrounding the thread of interest are affected.