Modular Debugger (mdb)

The mdb utility is an extensible utility for low-level debugging and editing of the live operating system. The utility can also debug system crash dumps, user processes, user process core dumps, and object files. In the Solaris 9 release, mdb provides new symbolic debugging support for the Solaris kernel and new kernel debugger commands. The mdb utility also provides new features for the examination and control of live running user processes, and the ability to examine raw disk files and devices.

The Solaris Modular Debugger Guide and the mdb(1) man page provide more information.