[previous] 3217 [next] Address of automatic object exported to a pointer with linkage or wider scope.
Pointers REFERENCE - ISO:C90-6.1.2.4 Storage Durations of Objects

The address of an automatic object has been assigned to a pointer which has linkage or wider scope. This is dangerous. When the local object goes out of scope, the value obtained by dereferencing the pointer will be undefined. Perhaps this object needs to be declared with static storage duration ?

For example: 


/*PRQA S 2017,3408,3447 ++*/

extern int* pi;

void foo(void)
{
    int a;
    pi = &a;                    /* Message 3217 */
}

MISRA C:2012 Rules applicable to message 3217:

Rule-18.6  (Required) The address of an object with automatic storage shall not be copied to another object that persists after the first object has ceased to exist

See also:

QA·C Source Code Analyser 8.1
MISRA C:2012 Compliance Module 1.0
© 2012 Programming Research.
www.programmingresearch.com 		Personality Groups | Glossary | Message Index | MISRA C:2012 Rule Index Contents