extra truss evilness

[Robin Schoonover]

It's possible to panic the system with truss (doesn't appear related to
race conditions with truss).

It appears that if truss is 'watching' a process, and the process forks,
than the system could possibly hang.  However this is rare and hard to
reproduce.

However, if a process truss is 'watching' forks, and then the parent
process is interupted (^C), than the system will panic multiple times. This
has a much higher likelyhood of occuring.

I've been able to reproduce this with the following C snippet:
int pid = fork(10);
sleep(10);

Run, wait a few seconds (so we KNOW we are after fork occurs), then hit ^C.
Panic.

-- 
Robin Schoonover (aka End)
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