KPROBE_EVENT_SYSTEM
tk = alloc_trace_kprobe(KPROBE_EVENT_SYSTEM, event, (void *)addr, func,
tk = find_trace_kprobe("testprobe", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe2", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe", KPROBE_EVENT_SYSTEM);
tk = find_trace_kprobe("testprobe2", KPROBE_EVENT_SYSTEM);
const char *event = NULL, *group = KPROBE_EVENT_SYSTEM;