Kernel Modular Debugger (KMDB) is an MDB-based kernel debugger. In the Solaris Express 8/04 release, KMDB replaced the existing kernel debugger (kadb) as the standard Solaris kernel debugger.
KMDB brings all the power and flexibility of Modular Debugger (MDB) to live kernel debugging. KMDB supports the following:
dcmds – Debugger commands
dmods – Debugger modules
Access to kernel type data
Kernel execution control
KMDB can be loaded at boot time or after the system has already booted.
For more information, see the kmdb(1M) man page. See also the Solaris Modular Debugger Guide and the System Administration Guide: Basic Administration.