问如何理解孩子死于来自父母的记忆，甚至信号是"9“。

EN

       siginfo_t {
           int      si_signo;    /* Signal number */
           int      si_errno;    /* An errno value */
           int      si_code;     /* Signal code */
           int      si_trapno;   /* Trap number that caused
                                    hardware-generated signal
                                    (unused on most architectures) */
           pid_t    si_pid;      /* Sending process ID */
           uid_t    si_uid;      /* Real user ID of sending process */
           int      si_status;   /* Exit value or signal */
           clock_t  si_utime;    /* User time consumed */
           clock_t  si_stime;    /* System time consumed */
           sigval_t si_value;    /* Signal value */
           int      si_int;      /* POSIX.1b signal */
           void    *si_ptr;      /* POSIX.1b signal */
           int      si_overrun;  /* Timer overrun count; POSIX.1b timers */
           int      si_timerid;  /* Timer ID; POSIX.1b timers */
           void    *si_addr;     /* Memory location which caused fault */
           long     si_band;     /* Band event (was int in
                                    glibc 2.3.2 and earlier) */
           int      si_fd;       /* File descriptor */
           short    si_addr_lsb; /* Least significant bit of address
                                    (since kernel 2.6.32) */
       }

static void signal_handler(int sig, siginfo_t *siginfo, void *context)
{
    printf ("Sending PID: %ld, UID: %ld\n", (long)siginfo->si_pid,(long)siginfo->si_uid);
}