[Bug 234350] [dtrace] Dtrace cannot print string arguments to system calls.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234350

--- Comment #6 from shamaz.mazum at gmail.com ---
(In reply to Mark Johnston from comment #4)
Update: the suggested patch seems to be working only partially. I can see
strings passed from userspace, but there are also many errors like so:

dtrace: error on enabled probe ID 1 (ID 77393: syscall:freebsd:openat:entry):
invalid address (0xffffffffffffff9c) in action #2 at DIF offset 12

Seems like kernel space address, is it not? Also, it is always the same address
(0xffffffffffffff9c).

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