昏晕几天！！！while(1)线程被莫名杀死！或阻塞！呜呜。。。

hoho_zhao

昏晕几天！！！while(1)线程被莫名杀死！或阻塞！求救。。。
( 俺不知道while(1)函数的实例是否叫线程，若有错，请指正)

main()
{
   ......
   ......
   while(1){
// 如果没有输入就继续循环
// 若有输入就执行以下程序
  ......
   ......
  }
}

/* 中断处理函数，没各1秒钟，内核唤醒执行，可以中断while(1)循环 */
void inthandler()
{ printf("......");
   // 画一个圆圈
  .......
}

请问！！！中断处理函数有可能杀死while(1)或阻塞它么？？？
若有，那是什么样的情况？

呜呜。。。我想晕了。。。不得其解！

现实情况：
    程序执行后，while(1)转了几圈之后就停止了，只有中断程序还按时中断执行。。。。

hoho_zhao

我是在没有按下按键的情况下被杀死/阻塞的，也就是说

在while(1)那里，没有输入，它一直循环查找输入，没有执行往下的语句，

却不过1、2秒就停止循环查找输入了

an0

你的main到底是被阻塞了，还是退出结束了？

an0

还有你所谓的“中断处理函数”是指singal handler吗？

hoho_zhao

是的，没错。请指教

hoho_zhao

main 应该还没有结束，因为中断还有响应，就是动不了了

an0

个人感觉有两种可能：
1. 你的while(1)循环有问题，导致到后来的读/写block；
2. 你的signal handler有问题，在signal handler中block，当然无法返回while循环中的中断点继续执行；然而，如果你的signal handle没有mask同种signal的话，随着这种signal的继续发生，signal handler还会不断继续得到调用，当然，每次signal handler执行到中间都会block，所以interrupt stack会越来越深，到最后肯定会耗尽内存；

看样子，2的可能性大一点。

hoho_zhao

你等等，我一会儿回来，嘻嘻，先谢了，忙中。。。。

hoho_zhao

请仁兄看看测试结果：
【this is the start of the while(1) loop: loop xxxx】表示while(1)的第几个循环
没有 this is the end of  the while(1) ，因为它搜索不到输入就重新再循环

以下两句是放在中断处理的头一句和尾一句
【this is the start of the interrupt-handler  loop: loop xxxx】
【this is the end of the interrupt-handler  loop: loop xxxx】



input = -1
this is the start of the while(1) loop:  loop 12517
input = -1
this is the start of the while(1) loop:  loop 12518
input = -1
this is the start of the while(1) loop:  loop 12519
input = -1
this is the start of the while(1) loop:  loop 12520
input = -1
this is the start of the while(1) loop:  loop 12521
input = -1
this is the start of the while(1) loop:  loop 12522
input = -1
this is the start of the while(1) loop:  loop 12523
input = -1
this is the start of the while(1) loop:  loop 12524
input = -1
this is the start of the while(1) loop:  loop ttiittittittittittittitiitiitiiti1this is the start of the while(1) loop:  loop 12803
input = -1
this is the start of the while(1) loop:  loop 12804
input = -1
this is the start of the while(1) loop:  loop 12805
input = -1
this is the start of the while(1) loop:  loop 12806
input = -1
this is the start of the while(1) loop:  loop 12807
input = -1
this is the start of the while(1) loop:  loop 12808
input = -1
this is the start of the while(1) loop:  loop 12809
input = -1
this is the start of the while(1) loop:  loop 12810
input = -1
this is the start of the while(1) loop:  loop 12811
input = -1
this is the start of the while(1) loop:  loop 12812
input = -1
this is the start of the while(1) loop:  loop 12813
input = -1
this is the start of the while(1) loop:  loop 12814
input = -1
this is the start of the while(1) loop:  loopttiittittittiittittittitiitiitiiti2this is the start of the while(1) loop:  loop 13180
input = -1
this is the start of the while(1) loop:  loop 13181
input = -1
this is the start of the while(1) loop:  loop 13182
input = -1
this is the start of the while(1) loop:  loop 13183
input = -1
this is the start of the while(1) loop:  loop 13184
input = -1
this is the start of the while(1) loop:  loop 13185
input = -1
this is the start of the while(1) loop:  loop 13186
input = -1
this is the start of the while(1) loop:  loop 13187
input = -1
this is the start of the while(1) loop:  loop 13188
input = -1
this is the start of the while(1) loop:  loop 13189
input = -1
this is the start of the while(1) loop:  loop 13190
input = -1
this is the start of the while(1) loop:  loop 13191
input = -1
this is the start of the while(1) loop:  looptttittittittittiitiittittittittitt3this is the start of the while(1) loop:  loop 13558
input = -1
this is the start of the while(1) loop:  loop 13559
input = -1
this is the start of the while(1) loop:  loop 13560
input = -1
this is the start of the while(1) loop:  loop 13561
input = -1
this is the start of the while(1) loop:  loop 13562
input = -1
this is the start of the while(1) loop:  loop 13563
input = -1
this is the start of the while(1) loop:  loop 13564
input = -1
this is the start of the while(1) loop:  loop 13565
input = -1
this is the start of the while(1) loop:  loop 13566
input = -1
this is the start of the while(1) loop:  loop 13567
input = -1
this is the start of the while(1) loop:  loop 13568
input = -1
this is the start of the while(1) loop:  loop 13569
input = -1
this is the start of the while(1) loop:  loopiittiitiitiittittitiittittittittit4this is the start of the interrupt_handler: loop 35
this is the end of the interrupt_handler: loop 35
this is the start of the interrupt_handler: loop 36
this is the end of the interrupt_handler: loop 36
this is the start of the interrupt_handler: loop 37
this is the end of the interrupt_handler: loop 37
this is the start of the interrupt_handler: loop 38
this is the end of the interrupt_handler: loop 38
this is the start of the interrupt_handler: loop 39
this is the end of the interrupt_handler: loop 39
this is the start of the interrupt_handler: loop 40
this is the end of the interrupt_handler: loop 40
this is the start of the interrupt_handler: loop 41
this is the end of the interrupt_handler: loop 41
this is the start of the interrupt_handler: loop 42
this is the end of the interrupt_handler: loop 42
this is the start of the interrupt_handler: loop 43
this is the end of the interrupt_handler: loop 43
this is the start of the interrupt_handler: loop 44

hoho_zhao

以上是程序一运行3秒钟左右的结果（前面一大段当然被截去），我没有任何干涉。