测试execve是否会销毁所有线程

test_thread.c

#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define NUM_OF_TASKS 1

void *func()
{
  while (1) {
    printf("%s\n", "hi");
    sleep(1);
  }
}

int main(int argc, char *argv[])
{
   pthread_t thread;
   int rc;
   int t;
   int downloadtime;

   pthread_attr_t thread_attr;
   pthread_attr_init(&thread_attr);
   pthread_attr_setdetachstate(&thread_attr,PTHREAD_CREATE_JOINABLE);

   rc = pthread_create(&thread, &thread_attr, func, NULL);
   if (rc){
     printf("ERROR; return code from pthread_create() is %d\n", rc);
     exit(-1);
   }

   sleep(3);
   execve("/bin/sh", 0, 0);
}