Linked by Adam S on Wed 11th Jun 2008 13:37 UTC
Remember back in January when Sun engineer Adam Leventhal shared that Apple had "crippled" DTrace? Well, it appears that the latest point release of Leopard silently restored DTrace to full function. According to Levanthal, on 10.5.3, the output of DTrace is "exactly what one would expect". DTrace can be used right now on your updated Leopard install. 
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Member since:
2006-01-31
Because of the license issues. It has nothing to do with NIH.
For Linux there's a different tool: SystemTap. It is an open source project, http://sourceware.org/systemtap, started by 'the big guys', but AFAIK it isn't included in any distro by default. The project is a few years old, is actually active ( I checked the git repo ), but I can't tell you what the actual state is...
Harry