gdb 7.4-2012.06-0ubuntu1 (amd64 binary) in ubuntu quantal

 GDB is a source-level debugger, capable of breaking programs at
 any specific line, displaying variable values, and determining
 where errors occurred. Currently, gdb supports C, C++, D,
 Objective-C, Fortran, Java, OpenCL C, Pascal, assembly, Modula-2,
 and Ada. A must-have for any serious programmer.