Function is_fstack_fd

adapter/syscall/ff_hook_syscall.c:266–273

}

int is_fstack_fd(int sockfd) {
    if (unlikely(inited == 0/* && ff_adapter_init() < 0*/)) {
        return 0;
    }

    /* FIXED ME: ff_linux_socket not limit fd < ff_kernel_max_fd, may be Misjudgment */
    return sockfd >= ff_kernel_max_fd;
}

static inline uint64_t 
ff_bitmap_first_set(fd_mask *ai, int set_words)