arch_uretprobe_is_alive
extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs);
while (ri && !arch_uretprobe_is_alive(ri, ctx, regs)) {
valid = !next_chain || arch_uretprobe_is_alive(next_chain, RP_CHECK_RET, regs);