More user-space probes

[Ananth N Mavinakayanahalli]

On Tue, Apr 22, 2008 at 08:40:32AM -0500, David Smith wrote:
> I've just finished implementing some new forms of user-space probing.
> Here's an example script:
> 
>   probe process("/bin/ls").exec { print("ls exec'ed!\n") }
>   probe process("/bin/ls").syscall { printf("|%d", $syscall) }
>   probe process("/bin/ls").syscall.return { print("+") }
>   probe process("/bin/ls").death { print("\nls done!\n") }
> 
> There are 5 new probe variants:
> 
>   process(PID_OR_PATH).clone
>   process(PID_OR_PATH).exec
>   process(PID_OR_PATH).death
>   process(PID_OR_PATH).syscall
>   process(PID_OR_PATH).syscall.return
> 
> (Internally, these are implemented using utrace.  These probe types also
> use the new "task_finder" framework, which provides the support by
> probing by PID or by PATH.  Eventually, the existing uprobes probes (and
> the future itrace probes) should be converted to use the "task_finder"
> framework.)

Dave,

Would it be possible to update the language reference with the new
constructs? I guess the langref needs an update for the marker support
too.

Ananth