/usr/share/systemtap/tapset/linux/i386/ is in systemtap-common 3.1-3ubuntu0.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/systemtap/tapset/linux/i386/aux_syscalls.stp
/usr/share/systemtap/tapset/linux/i386/sysc_execve.stp
/usr/share/systemtap/tapset/linux/i386/sysc_get_thread_area.stp
/usr/share/systemtap/tapset/linux/i386/sysc_iopl.stp
/usr/share/systemtap/tapset/linux/i386/sysc_ipc.stp
/usr/share/systemtap/tapset/linux/i386/sysc_mmap2.stp
/usr/share/systemtap/tapset/linux/i386/sysc_set_thread_area.stp
/usr/share/systemtap/tapset/linux/i386/sysc_set_zone_reclaim.stp
/usr/share/systemtap/tapset/linux/i386/sysc_sigaltstack.stp
/usr/share/systemtap/tapset/linux/i386/sysc_vm86.stp
/usr/share/systemtap/tapset/linux/i386/sysc_vm86old.stp
/usr/share/systemtap/tapset/linux/i386/syscall_num.stp