$ sudo ./seccomp_bpf 
[==========] Running 64 tests from 1 test cases.
[ RUN      ] global.mode_strict_support
[       OK ] global.mode_strict_support
[ RUN      ] global.mode_strict_cannot_call_prctl
[       OK ] global.mode_strict_cannot_call_prctl
[ RUN      ] global.no_new_privs_support
[       OK ] global.no_new_privs_support
[ RUN      ] global.mode_filter_support
[       OK ] global.mode_filter_support
[ RUN      ] global.mode_filter_without_nnp
[       OK ] global.mode_filter_without_nnp
[ RUN      ] global.filter_size_limits
[       OK ] global.filter_size_limits
[ RUN      ] global.filter_chain_limits
[       OK ] global.filter_chain_limits
[ RUN      ] global.mode_filter_cannot_move_to_strict
[       OK ] global.mode_filter_cannot_move_to_strict
[ RUN      ] global.mode_filter_get_seccomp
[       OK ] global.mode_filter_get_seccomp
[ RUN      ] global.ALLOW_all
[       OK ] global.ALLOW_all
[ RUN      ] global.empty_prog
[       OK ] global.empty_prog
[ RUN      ] global.log_all
[       OK ] global.log_all
[ RUN      ] global.unknown_ret_is_kill_inside
[       OK ] global.unknown_ret_is_kill_inside
[ RUN      ] global.unknown_ret_is_kill_above_allow
[       OK ] global.unknown_ret_is_kill_above_allow
[ RUN      ] global.KILL_all
[       OK ] global.KILL_all
[ RUN      ] global.KILL_one
[       OK ] global.KILL_one
[ RUN      ] global.KILL_one_arg_one
[       OK ] global.KILL_one_arg_one
[ RUN      ] global.KILL_one_arg_six
[       OK ] global.KILL_one_arg_six
[ RUN      ] global.KILL_thread
[       OK ] global.KILL_thread
[ RUN      ] global.KILL_process
[       OK ] global.KILL_process
[ RUN      ] global.arg_out_of_range
[       OK ] global.arg_out_of_range
[ RUN      ] global.ERRNO_valid
[       OK ] global.ERRNO_valid
[ RUN      ] global.ERRNO_zero
[       OK ] global.ERRNO_zero
[ RUN      ] global.ERRNO_capped
[       OK ] global.ERRNO_capped
[ RUN      ] global.ERRNO_order
[       OK ] global.ERRNO_order
[ RUN      ] TRAP.dfl
[       OK ] TRAP.dfl
[ RUN      ] TRAP.ign
[       OK ] TRAP.ign
[ RUN      ] TRAP.handler
[       OK ] TRAP.handler
[ RUN      ] precedence.allow_ok
[       OK ] precedence.allow_ok
[ RUN      ] precedence.kill_is_highest
[       OK ] precedence.kill_is_highest
[ RUN      ] precedence.kill_is_highest_in_any_order
[       OK ] precedence.kill_is_highest_in_any_order
[ RUN      ] precedence.trap_is_second
[       OK ] precedence.trap_is_second
[ RUN      ] precedence.trap_is_second_in_any_order
[       OK ] precedence.trap_is_second_in_any_order
[ RUN      ] precedence.errno_is_third
[       OK ] precedence.errno_is_third
[ RUN      ] precedence.errno_is_third_in_any_order
[       OK ] precedence.errno_is_third_in_any_order
[ RUN      ] precedence.trace_is_fourth
[       OK ] precedence.trace_is_fourth
[ RUN      ] precedence.trace_is_fourth_in_any_order
[       OK ] precedence.trace_is_fourth_in_any_order
[ RUN      ] precedence.log_is_fifth
[       OK ] precedence.log_is_fifth
[ RUN      ] precedence.log_is_fifth_in_any_order
[       OK ] precedence.log_is_fifth_in_any_order
[ RUN      ] TRACE_poke.read_has_side_effects
[       OK ] TRACE_poke.read_has_side_effects
[ RUN      ] TRACE_poke.getpid_runs_normally
[       OK ] TRACE_poke.getpid_runs_normally
[ RUN      ] TRACE_syscall.ptrace_syscall_redirected
[       OK ] TRACE_syscall.ptrace_syscall_redirected
[ RUN      ] TRACE_syscall.ptrace_syscall_dropped
seccomp_bpf.c:1808:TRACE_syscall.ptrace_syscall_dropped:Expected 1 (1) == syscall(286) (18446744073709551615)
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #13
[     FAIL ] TRACE_syscall.ptrace_syscall_dropped
[ RUN      ] TRACE_syscall.syscall_allowed
[       OK ] TRACE_syscall.syscall_allowed
[ RUN      ] TRACE_syscall.syscall_redirected
[       OK ] TRACE_syscall.syscall_redirected
[ RUN      ] TRACE_syscall.syscall_dropped
[       OK ] TRACE_syscall.syscall_dropped
[ RUN      ] TRACE_syscall.skip_after_RET_TRACE
[       OK ] TRACE_syscall.skip_after_RET_TRACE
[ RUN      ] TRACE_syscall.kill_after_RET_TRACE
[       OK ] TRACE_syscall.kill_after_RET_TRACE
[ RUN      ] TRACE_syscall.skip_after_ptrace
[       OK ] TRACE_syscall.skip_after_ptrace
[ RUN      ] TRACE_syscall.kill_after_ptrace
[       OK ] TRACE_syscall.kill_after_ptrace
[ RUN      ] global.seccomp_syscall
[       OK ] global.seccomp_syscall
[ RUN      ] global.seccomp_syscall_mode_lock
[       OK ] global.seccomp_syscall_mode_lock
[ RUN      ] global.detect_seccomp_filter_flags
[       OK ] global.detect_seccomp_filter_flags
[ RUN      ] global.TSYNC_first
[       OK ] global.TSYNC_first
[ RUN      ] TSYNC.siblings_fail_prctl
[       OK ] TSYNC.siblings_fail_prctl
[ RUN      ] TSYNC.two_siblings_with_ancestor
[       OK ] TSYNC.two_siblings_with_ancestor
[ RUN      ] TSYNC.two_sibling_want_nnp
[       OK ] TSYNC.two_sibling_want_nnp
[ RUN      ] TSYNC.two_siblings_with_no_filter
[       OK ] TSYNC.two_siblings_with_no_filter
[ RUN      ] TSYNC.two_siblings_with_one_divergence
[       OK ] TSYNC.two_siblings_with_one_divergence
[ RUN      ] TSYNC.two_siblings_not_under_filter
[       OK ] TSYNC.two_siblings_not_under_filter
[ RUN      ] global.syscall_restart
[       OK ] global.syscall_restart
[ RUN      ] global.filter_flag_log
[       OK ] global.filter_flag_log
[ RUN      ] global.get_action_avail
[       OK ] global.get_action_avail
[ RUN      ] global.get_metadata
seccomp_bpf.c:2913:global.get_metadata:Expected sizeof(md) (16) == ptrace(0x420d, pid, sizeof(md), &md) (18446744073709551615)
global.get_metadata: Test terminated by assertion
[     FAIL ] global.get_metadata
[==========] 62 / 64 tests passed.
[  FAILED  ]