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Date:      Fri, 07 Jun 2024 10:28:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 279566] procctl not working as expected.
Message-ID:  <bug-279566-227-GaKezgxs94@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-279566-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-279566-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D279566

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kib@FreeBSD.org

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
This is what I get on stable/14:

solo% echo $$                                                              =
   ~
130

In other session
solo% proccontrol -m trace -s disable -p 130
solo% proccontrol -m trace -q -p 130
disabled
solo% truss -p 130
truss: can not attach to target process: Operation not permitted

Similarly, with your test program and another victim process 1299:
solo% proccontrol -m trace -q -p 1299
enabled, no debugger
solo% cc -o pr-279566 pr-279566.c
solo% proccontrol -m trace -q -p 1299
enabled, no debugger
solo% ./pr-279566 1299
Tracing disabled for process 1299
solo% proccontrol -m trace -q -p 1299
disabled
solo% truss -p 1299
truss: can not attach to target process: Operation not permitted

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