#value_indexed
BPF_FD_TYPE_RAW_TRACEPOINT	0
BPF_FD_TYPE_TRACEPOINT		1
BPF_FD_TYPE_KPROBE		2
BPF_FD_TYPE_KRETPROBE		3
BPF_FD_TYPE_UPROBE		4
BPF_FD_TYPE_URETPROBE		5