Red Hat ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE, Manual

Page: 141 / 410

Chapter 15. Examining the Symbol Table 131
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which programming language it is written in,
•
whether the executable includes debugging information for that file, and if so, what format the
information is in (e.g., STABS, Dwarf 2, etc.), and
•
whether the debugging information includes information about preprocessor macros.
info sources
Print the names of all source files in your program for which there is debugging information,
organized into two lists: files whose symbols have already been read, and files whose symbols
will be read when needed.
info functions
Print the names and data types of all defined functions.
info functions
regexp
Print the names and data types of all defined functions whose names contain a match for regu-
lar expression
regexp
. Thus,
info fun step
finds all functions whose names include
step
;
info fun ^step
finds those whose names start with
step
. If a function name contains charac-
ters that conflict with the regular expression language (eg.
operator*()
), they may be quoted
with a backslash.
info variables
Print the names and data types of all variables that are declared outside of functions (that is,
excluding local variables).
info variables
regexp
Print the names and data types of all variables (except for local variables) whose names contain
a match for regular expression
regexp
.
info classes
info classes
regexp
Display all Objective-C classes in your program, or (with the
regexp
argument) all those match-
ing a particular regular expression.
info selectors
info selectors
regexp
Display all Objective-C selectors in your program, or (with the
regexp
argument) all those
matching a particular regular expression.
Some systems allow individual object files that make up your program to be replaced without
stopping and restarting your program. For example, in VxWorks you can simply recompile a
defective object file and keep on running. If you are running on one of these systems, you can
allow gdb to reload the symbols for automatically relinked modules:
set symbol-reloading on
Replace symbol definitions for the corresponding source file when an object file with a
particular name is seen again.