stack around the variable "xxx"was corrupted.

最新推荐文章于 2022-03-27 21:30:23 发布

原创最新推荐文章于 2022-03-27 21:30:23 发布 · 3.1k 阅读

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#compiler #properties #include #ibm #buffer #build

本文探讨了在使用C语言编程时遇到的运行时检查失败#2错误，并详细解释了如何通过调整缓冲区大小和启用编译器选项/RTC1来解决堆栈周围变量被破坏的问题。

#include <stdio.h>
#include <string.h>
#define BUFF_LEN 12 // 12 may fix the Run-Time Check Failure #2
int rtc_option_test(char * pStr);
int cgiMain()
{
char * myStr = "hello world";
rtc_option_test(myStr);
return 0;
}

int rtc_option_test(char * pStr)
{
char buff[BUFF_LEN];
strcpy(buff, pStr); //cause Run-Time Check Failure #2 - Stack around
//the variable 'buff' was corrupted.
return 0;
}

Problem

The following error message occurs when building on Test RealTIme environment with the cvisual7 TDP?

Run-Time Check Failure #2 - Stack around the variable 'xxx' was corrupted.

Cause
Stack pointer corruption is caused writing outside the allocated buffer in stack memeory.

//原因在于buff分配的大小是11，而pStr指向字符串大小是12 。错误在此！
Solution
This kind of error is detected by setting /RTC1 compiler option from menu Project -> Settings -> Configuration properties -> Build -> Compiler -> Compiler flags when using TDP cvisual7 in IBM® Rational® Test RealTime environment.. This enables stack frame run-time error checking. For example, the following code may cause the above error messge.