The CXXDEMANGLE command enables you to decode compiler-generated names.
  To accomplish this, CXXDEMANGLE uses a data file created by the C++
  compiler when you compile a program.  The data file contains a
  mapping of symbol names from their encoded to decoded forms.
  When asked to decode a name that is not the data file, CXXDEMANGLE
  returns the original name.

  CXXDEMANGLE provides two interfaces: a command line interface and an
  interactive interface.

  o To use the command line interface, enter the CXXDEMANGLE command followed
    by a comma-separated list of symbol names in their mangled form.
    CXXDEMANGLE then displays the demangled form of each symbol and exits.
    The syntax for the command line interface is:

    CXXDEMANGLE mangled-symbol-name [,...]

  o To use the interactive interface, enter the CXXDEMANGLE command without
    specifying a symbol name.  CXXDEMANGLE then waits for you to enter a
    symbol name in its mangled form.  When you enter a symbol, CXXDEMANGLE
    displays the demangled form of the symbol and waits for you to enter
    another symbol, and so forth.  To exit the interactive interface, enter
    <CTRL/Z>.  The syntax for the interactive interface is:

       CXXDEMANGLE
       mangled-symbol-name
       [...]
       <CRTL/Z>