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#define _GNU_SOURCE
#include
#include
#include
#include
#include
#include
#include
#include
#define STACK_SIZE (1024 * 1024) // 定义栈大小
// 子任务的入口函数
void *child_func(void *arg)
{
printf("子任务: PID=%ld, PPID=%ld, TID=%ld\n", (long)getpid(),
(long)getppid(), (long)syscall(SYS_gettid));
sleep(3);
}
int main()
{
char *stack; // 栈的指针
char *stack_top; // 栈顶的指针
pid_t child_tid;
pid_t forkPid;
pid_t threadPid;
printf("主任务：我是%d\n", getpid());
if ((forkPid = fork()) == 0)
{
sleep(3);
exit(0);
}
printf("主任务：fork子任务 %d\n", forkPid);
pthread_create(&threadPid, NULL, child_func, NULL);
printf("主任务：create新线程%d\n", threadPid);
// 使用 clone 创建子任务
child_tid = clone(child_func, stack_top, SIGCHLD, NULL);
if (child_tid == -1)
{
perror("clone");
free(stack);
exit(EXIT_FAILURE);
}
printf("主任务: 创建了子任务, TID=%ld\n", (long)child_tid);
// 等待子任务结束
if (waitpid(child_tid, NULL, 0) == -1)
{
perror("waitpid");
free(stack);
exit(EXIT_FAILURE);
}
// 释放分配的栈
// free(stack);
printf("主任务: 子任务结束\n");
return 0;
}
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