Some GDB commands are particularly useful with C++, and some are
designed specifically for use with C++. Here is a summary:
breakpoint menus
When you want a breakpoint in a function whose name is overloaded,
GDB breakpoint menus help you specify which function definition
you want. See Breakpoint Menus.
rbreak regex
Setting breakpoints using regular expressions is helpful for setting
breakpoints on overloaded functions that are not members of any special
classes.
See Set Breaks.
catch throw
catch catch
Debug C++ exception handling using these commands. See Set Catchpoints.
ptype typename
Print inheritance relationships as well as other information for type
typename.
See Symbols.
set print demangle
show print demangle
set print asm-demangle
show print asm-demangle
Control whether C++ symbols display in their source form, both when
displaying code as C++ source and when displaying disassemblies.
See Print Settings.
set print object
show print object
Choose whether to print derived (actual) or declared types of objects.
See Print Settings.
set print vtbl
show print vtbl
Control the format for printing virtual function tables.
See Print Settings.
(The vtbl commands do not work on programs compiled with the HP
ANSI C++ compiler (aCC).)
set overload-resolution on
Enable overload resolution for C++ expression evaluation. The default
is on. For overloaded functions, GDB evaluates the arguments
and searches for a function whose signature matches the argument types,
using the standard C++ conversion rules (see C plus plus expressions, for details). If it cannot find a match, it emits a
message.
set overload-resolution off
Disable overload resolution for C++ expression evaluation. For
overloaded functions that are not class member functions, GDB
chooses the first function of the specified name that it finds in the
symbol table, whether or not its arguments are of the correct type. For
overloaded functions that are class member functions, GDB
searches for a function whose signature exactly matches the
argument types.
Overloaded symbol names
You can specify a particular definition of an overloaded symbol, using
the same notation that is used to declare such symbols in C++: type
symbol(types) rather than just symbol. You can
also use the GDB command-line word completion facilities to list the
available choices, or to finish the type list for you.
See Completion, for details on how to do this.
Debugging with GDB