NOTE: utrace is deprecated. Linux kernels with version >= 3.5 (2012-July) contain most or all of the infrastructure necessary for user-space probing, without these earlier utrace patches. The rest of this page is purely historical.
To get the current code via GIT, take a look at the "utrace" branches at http://git.kernel.org/?p=linux/kernel/git/oleg/misc.git;a=summary
A "utrace-ext" (random utrace extensions) repository can be found at: git://elastic.org/~fche/utrace-ext.git
The API documentation in HTML is at: http://userweb.kernel.org/~frob/utrace/DocBook/
utrace/arch: Making utrace work on each machine architecture
utrace/ToDo: possible future work
utrace/Docs: Some mixed material from mailing lists, code...