LTTNG_KERNEL_TRACEPOINT = 0,
LTTNG_KERNEL_KPROBE = 1,
LTTNG_KERNEL_FUNCTION = 2,
LTTNG_KERNEL_KRETPROBE = 3,
LTTNG_KERNEL_NOOP = 4, /* not hooked */
LTTNG_KERNEL_TRACEPOINT = 0,
LTTNG_KERNEL_KPROBE = 1,
LTTNG_KERNEL_FUNCTION = 2,
LTTNG_KERNEL_KRETPROBE = 3,
LTTNG_KERNEL_NOOP = 4, /* not hooked */