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EXC_BAD_ACCESS

 
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EXC_BAD_ACCESS, what is the problem with this code
basavarajkm
7 Feb, 2008 - 01:09 AM
Post #1

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CODE
#include <iostream>
    
#define GSTR(str)  GConstString(L"  " L##str L"\0", sizeof(str)-1)
    
class GConstString
{
public:
    union
    {
        wchar_t    *pData;
        int    *pSize;
    };
    GConstString(wchar_t p[], int size)
    {
        pData = p;
        *pSize = size;  
    }
};

int main()
{
    GSTR("GFC Application Module");
    return 0;
}
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Bench
RE: EXC_BAD_ACCESS
7 Feb, 2008 - 02:56 PM
Post #2

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Where exactly did you see the message which you've described in the topic title?

union structures cause each member to share the same space in memory. This means that only one member can be active at any time, and to use another at the same time, on the same union object is undefined behaviour (And may be the root cause of your error message).
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