We provide a mechanism to trace the NPTL Library as few intrusive as possible for the application dynamics. The post-mortem analysis then allows measurements (contension,...) and understanding of hangs or bugs. No change in kernel or user application.
The dude is a UNIX debugging package independent of the ptrace() system call; it consists of a kernel module [the_dude.o], a library to interface with the module [libduderino.so], and an ncurses client [ddbg] .
PrivateICE is a kernel level debugger similar to SoftICE
on Windows. Planned is also a GUI interface for normal debugging in a multitasking environment, as opposed to SoftICE which always halts the entire machine when active.