gdb.info: Debugging C plus plus

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GDB features for C++

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.  *Note Breakpoint menus: 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.  *Note Setting breakpoints: Set Breaks.
`catch throw'
`catch catch'
     Debug C++ exception handling using these commands.  *Note Setting
     catchpoints: Set Catchpoints.
`ptype TYPENAME'
     Print inheritance relationships as well as other information for
     type TYPENAME.  *Note Examining the Symbol Table: 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.
     *Note Print settings: Print Settings.
`set print object'
`show print object'
     Choose whether to print derived (actual) or declared types of
     objects.  *Note Print settings: Print Settings.
`set print vtbl'
`show print vtbl'
     Control the format for printing virtual function tables.  *Note
     Print settings: 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 *Note
     C++ expressions: 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.  *Note
     Command completion: Completion, for details on how to do this.