The following running error occurs during program debugging today:
"Run-Time check failure #2-stack around the variable 'sznum' was has upted ."
Then,Yin_xiaogang"Blog found the solution to this problem:
Reprinted address:Http://hi.baidu.com/yin_xiaogang/blog/item/9543b61329847d075aaf53e6.html
Stack around the variable was corrupted2008-07-15
| 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 upted. |
| |
| Cause |
| Stack pointer transaction uption is caused writing outside the allocated buffer in stack memeory. |
| |
| Solution |
| This kind of error is detected by setting/rtc1 compiler option from menu project-> Settings-> Configuration properties-> build-> 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. # Include <stdio. h>
# Include <string. h> # Define buff_len 11 // 12 may fix the run-time check failure #2
Int rtc_option_test (char * pstr ); Int main ()
{
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 'bucket' was upted.
Return 0;
}
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| Related information |
IBM Rational testrt support
Http://www-1.ibm.com/support/docview.wss? Rs = 945 & context = ssshuf & context = sssty3 & context = sscsnzn & context = ssstwp & Q1 = stack + around + the + variable + was + synchronized upted & uid = swg21211974 & loc = en_us & cs = UTF-8 & lang = enVS 2005
Change Project-> Configuration properties-> C/C ++-> code generation-> basic runtime check
The default value will not report the exception. If it is changed to another one, an exception exists. Exception sometimes makes sense. // Step 1
Stringc2 & stringc2: Operator + = (const char X)
{
// If (x = 0) return * this; Char PTR [1]; // Max is 1 digit PTR [0] = X;
PTR [1] = '/0 ';
* This + = PTR; // off to step 2 and back Return * This; // Step 4 crash
}
This will also cause the above exception |
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