#include <stdio.h>#include <pthread.h>#include <sys/types.h>#include <sys/syscall.h>struct message{    int i;    int j;};void *hello(struct message *str){    printf("child, the tid=%lu, pid=%d\n",pthread_self(),syscall(SYS_gettid));    printf("the arg.i is %d, arg.j is %d\n",str->i,str->j);    printf("child, getpid()=%d\n",getpid());    while(1);}int main(int argc, char *argv[]){    struct message test;    pthread_t thread_id;    test.i=10;    test.j=20;    pthread_create(&thread_id,NULL,hello,&test);    printf("parent, the tid=%lu, pid=%d\n",pthread_self(),syscall(SYS_gettid));    printf("parent, getpid()=%d\n",getpid());    pthread_join(thread_id,NULL);    return 0;}