c++ - 在递归 C++ 函数中捕获 "Stack Overflow"异常

Question

是否可以在递归 C++ 函数中捕获 堆栈溢出异常？如果是，怎么办？

那么在这种情况下会发生什么

void doWork()
{

     try() {

     doWork();    
     }


     catch( ... )  {

     doWork();    
     }
}  

我不是在寻找特定操作系统的答案。一般情况下

Answer 1

这本身并不是一个异常(exception)，但如果您只是想将堆栈使用量限制在固定数量，您可以这样做:

#include <stdio.h>

// These will be set at the top of main()
static char * _topOfStack;
static int _maxAllowedStackUsage;

int GetCurrentStackSize()
{
   char localVar;
   int curStackSize = (&localVar)-_topOfStack;
   if (curStackSize < 0) curStackSize = -curStackSize;  // in case the stack is growing down
   return curStackSize;
}

void MyRecursiveFunction()
{
   int curStackSize = GetCurrentStackSize();
   printf("MyRecursiveFunction:  curStackSize=%i\n", curStackSize);

   if (curStackSize < _maxAllowedStackUsage) MyRecursiveFunction();
   else
   {
      printf("    Can't recurse any more, the stack is too big!\n");
   }
}

int main(int, char **)
{
   char topOfStack;
   _topOfStack = &topOfStack;
   _maxAllowedStackUsage = 4096;  // or whatever amount you feel comfortable allowing

   MyRecursiveFunction();
   return 0;
}