Function ff_hook_select

adapter/syscall/ff_hook_syscall.c:2610–2917

}

int
ff_hook_select(int nfds, fd_set *restrict readfds, fd_set *restrict writefds,
    fd_set *restrict exceptfds, struct timeval *restrict timeout)
{
    int set_words;
    int set_bytes;
    int fd;
    int max_kernel_fd = 0;
    int max_ff_fd = 0;
    fd_mask *fds_bit;
    struct timespec t_s, t_n;
    time_t now_time_ms = 0;
    time_t end_time_ms = 0;
    int ff_set_words, ff_set_bytes = 0;
    int kernel_set_words, kernel_set_bytes = 0;
    int kernel_ret = 0;
    
    DEBUG_LOG("ff_hook_select nfds:%d\n", nfds);

    DEFINE_REQ_ARGS_STATIC(select);
    static __thread fd_set *ff_readfds_share = NULL;
    static __thread fd_set *ff_writefds_share = NULL;
    static __thread fd_set *ff_exceptfds_share = NULL;
    static __thread fd_set kernel_readfds;
    static __thread fd_set kernel_writefds;
    static __thread fd_set kernel_exceptfds;
    static __thread fd_set ff_readfds;
    static __thread fd_set ff_writefds;
    static __thread fd_set ff_exceptfds;

    bool have_ff_readfd = false;
    bool have_ff_writefd = false;
    bool have_ff_exceptfd = false;
    bool have_kernel_fd = false;
    bool have_exec_kernel_select = false;

    if (nfds > FD_SETSIZE) {
        nfds = FD_SETSIZE;
    }

    if (ff_kernel_max_fd >= FD_SETSIZE) {
        return ff_linux_select(nfds, readfds, writefds, exceptfds, timeout);
    }

    set_words = (nfds + NFDBITS - 1) / NFDBITS;
    set_bytes = set_words * sizeof(fd_mask);

    if (ff_readfds_share == NULL) {
        ff_readfds_share = share_mem_alloc(sizeof(fd_set));
        if (ff_readfds_share == NULL) {
            RETURN_ERROR_NOFREE(ENOMEM);
        }
    }

    if (ff_writefds_share == NULL) {
        ff_writefds_share = share_mem_alloc(sizeof(fd_set));
        if (ff_writefds_share == NULL) {
            RETURN_ERROR_NOFREE(ENOMEM);