a few months back, i wrote that i was working on a port of dtrace for linux.
its now working (where working means i can trace syscalls and maybe more), and am working
to get the quality up high. it currently compiles against latest kernels (2.6.23.1 is the earliest
i have tried, but ubuntu7 + 8 and 32 + 64 bit versions work).

if anyone is interested, grab the source from

http : // www . crisp . demon . co . uk / tools . html

you can contact me at fox at crisp.demon.co.uk

i have some blog info on that site, or see the changelog for some history and documentation
in the release.

theres lots to get working properly, e.g. profiles (ticks), some yacc parsing issues, and
many internal D functions (stack traces and proc info).