Symbol Table

info address s
Show where symbol s] is stored.
info func regexp
Show names, types of defined functions (all, or matching regexp).
info var regexp
Show names, types of global variables (all, or matching regexp).
whatis [expr]
Show data type of expr [or $] without evaluating.
ptype [expr]
Show data type and detail of expr [or $] without evaluating.
ptype type
Describe type, struct, union, or enum.