Dtrace

nm

• display the name list (symbol table) of a binary (object file or fully linked program)
• Each symbol name is preceded by its value (blanks if undefined).
• Unless the -m option is specified, this value is followed by one of the following characters, representing the symbol type:
  • U - undefined
  • A - absolute
  • T - text section symbol
  • D - data section symbol
  • B - bss section symbol
  • C - common symbol
  • S - symbol in a section other than those above
  • I - indirect symbol
• If the symbol is local (non-external), the symbol's type is instead represented by the corresponding lowercase letter.
• A lower case u in a dynamic shared library indicates a undefined reference to a private external in another module in the same library.

c++filt

• program used to demangle (translate) symbols contained in a c++ application