>> В Солярисе DTrace можно было(sic!) пользоваться без повышения привилегий?
> Да, и во FreeBSD тоже. Всё, что доступно тебе для отладки, доступно и для DTrace.

анон@bsd % /usr/share/dtrace/watch_execve   
dtrace: failed to initialize dtrace: DTrace requires additional privileges
root@bsd # sysctl security.bsd.unprivileged_proc_debug:1
security.bsd.unprivileged_proc_debug: 0 -> 1
aнон@bsd % /usr/share/dtrace/watch_execve
dtrace: failed to initialize dtrace: DTrace requires additional privileges
aнон@bsd % truss /usr/share/dtrace/watch_execve|tail
openat(AT_FDCWD,"/dev/dtrace/fbt",O_RDONLY|O_CLOEXEC,00) ERR#13 'Permission denied'
openat(AT_FDCWD,"/dev/dtrace/nfscl",O_RDONLY|O_CLOEXEC,00) ERR#2 'No such file or directory'
openat(AT_FDCWD,"/dev/dtrace/dtmalloc",O_RDONLY|O_CLOEXEC,00) ERR#13 'Permission denied'
openat(AT_FDCWD,"/dev/dtrace/dtrace",O_RDWR|O_CLOEXEC,00) ERR#13 'Permission denied'
openat(AT_FDCWD,"/dev/dtrace/fasttrap",O_RDWR|O_CLOEXEC,00) ERR#13 'Permission denied'
dtrace: write(2,"dtrace: ",8)                 = 8 (0x8)
failed to initialize dtrace: DTrace requires additional privileges
write(2,"failed to initialize dtrace: DTr"...,67) = 67 (0x43)
exit(0x1)                    
process exit, rval = 1