Uses address after free

Use of pointer to deallocated storage.

This diagnostic covers various ways a pointer value can be used after the storage to which it points has been deallocated. There is another diagnostic type for the specific error of dereferencing a pointer after it has been freed. This diagnostic covers other uses, such as returning the address of deallocated storage from a function.

ID	Code Location	Description
1	Bad memory access	The place where the bad address was used
1	Deallocation site	The place where the address was deallocated

Example


#include <iostream>
using namespace std;
int glob;

int *UseDeallocatedStorage()
{
    int *p = new int[10];
    delete [] p; // p is now a stale pointer

    if (p != 0) // used in compare
        cout << "p == 0: " << p << endl; // used in print
        glob = (int) p; // used in type conversion to integer
    }
    return (p); // used as function return
}
 
int main(int argc, char **argv) 
{
    (void)UseDeallocatedStorage();
    return 0;
}