执行thread_kill时发生分割故障

Question

我用C在Linux上开发一个简单的程序，其中有用于检查自节目的开始，并且当它们已通过10秒，发送结束信号（SIGINT或SIGTERM，例如）经过的时间与主线程程序，应该让它在一个干净的方式结束。

C程序被安装在端部。

当执行到thread_kill通话，发生分段故障。

用gdb运行这个程序的结果如下：

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff77f2700 (LWP 25472)]
__pthread_kill (threadid=25466, signo=2) at 
../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:42
42  ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c: No such file or directory.
(gdb) bt
#0  __pthread_kill (threadid=25466, signo=2) at     ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:42
#1  0x0000000000400a1e in ThreadRoutine (number=1) at program_16b.c:46
#2  0x00007ffff7bc4184 in start_thread (arg=0x7ffff77f2700) at pthread_create.c:312
#3  0x00007ffff78f103d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
(gdb) 

什么是错在我的代码？

program.c：

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <signal.h>


#define _REENTRANT

struct timeval begin, end;


void siginthandler(int param)
{
  printf("User has pressed Ctrl + C\n");

}


void *ThreadRoutine(int number)
{
  long microseconds;

  printf ("[thread %d] pthread_self = %d, getpid = %d, getppid = %d\n",
           number, pthread_self(), getpid(), getppid());


  while(1) // loop forever
  {
    printf("thread type 1 (%d) running\n",number);
    if (number == 1)
    {
      gettimeofday(&end, NULL);
      microseconds = (end.tv_sec - begin.tv_sec) * 1000000 + (end.tv_usec - begin.tv_usec);
      printf ("Microseconds from starting time = %ld\n", microseconds);
      if (microseconds >= 10000000)
      {
        printf("Killing parent process after 10 seconds from starting.\n");
        pthread_kill(getppid(), SIGINT);
      }    
    }
    sleep(number); // sleep for number seconds, value passed as a parameter.
  }
}



int main(void)
{
  int t;
  pthread_t tid[13]; // an array to keep track of the threads

  // To create a detached thread.
  pthread_attr_t attr; // thread attribute

  // To call to pthread_attr_get...
  int rc, val;
  struct sched_param sp;
  size_t v;
  void *stkaddr;


  signal(SIGINT, siginthandler);

  printf ("[parent] pid = %d\n", getpid());

  gettimeofday(&begin, NULL);

  for (t=1; t<3; t++)
    {
    pthread_create(&tid[t],NULL,(void *)ThreadRoutine,(int *)t);
    printf ("Created thread %d with id=%d\n", t, (int)tid[t]);
    }

  sleep(30);

  return 0;
}

当程序运行时的屏幕输出：

[parent] pid = 18994
Created thread 1 with id=1463871232
[thread 1] pthread_self = 1463871232, getpid = 18994, getppid = 25402
thread type 1 (1) running
Microseconds from starting time = 175
[thread 2] pthread_self = 1455478528, getpid = 18994, getppid = 25402
thread type 1 (2) running
Created thread 2 with id=1455478528
thread type 1 (1) running
Microseconds from starting time = 1000319
thread type 1 (2) running
thread type 1 (1) running
Microseconds from starting time = 2000536
thread type 1 (1) running
Microseconds from starting time = 3000722
thread type 1 (2) running
thread type 1 (1) running
Microseconds from starting time = 4000819
thread type 1 (1) running
Microseconds from starting time = 5000997
thread type 1 (2) running
thread type 1 (1) running
Microseconds from starting time = 6001088
thread type 1 (1) running
Microseconds from starting time = 7001264
thread type 1 (2) running
thread type 1 (1) running
Microseconds from starting time = 8001383
thread type 1 (1) running
Microseconds from starting time = 9001556
thread type 1 (2) running
thread type 1 (1) running
Microseconds from starting time = 10001677
Killing parent process after 10 seconds from starting.
Segmentation fault (core dumped)

Answer 1

关于：

杀死10秒后父进程从开始

线程没有一个子进程。所以在线程函数的代码试图杀死安装/运行程序的过程中（可能是壳）

Answer 2

对于pthread_kill()的Ubuntu 18.04的man page有这个原型：int pthread_kill(pthread_t thread, int sig); ...请注意第一个参数是“线程ID”，不是说你已经通过getppid()指定的进程ID。 - TonyB

我用pthread_self()相反，程序作品的权利。 - jstechg