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# include "bool.h"
void g(/*@temp@*/ int *y);
/*@truenull@*/ bool ptrpred (/*@out@*/ /*@null@*/ int *x)
{
return (x == NULL); /* new error detected by out undef */
}
/*@only@*/ int *f(/*@null@*/ int *x)
{
int *y = (int *)malloc (sizeof (int));
int *z;
int *z2;
int *z3;
int *z4;
int *z5;
if (!x) { return x; /* 1. Unqualified storage returned as only: x,
** 2. Possibly null storage returned as non-null: x
** 3. Fresh storage y not released before return
*/
}
z = (int *) malloc (sizeof (int));
z2 = (int *)malloc (sizeof (int));
z3 = (int *)malloc (sizeof (int));
*x = 7;
*y = 3; /* 4. Possible dereference of null pointer: *y */
free (y);
g(z); /* 5. Possibly null storage passed as non-null param: z
** 6. Passed storage z not completely defined (allocated only): z
*/
if (z) { *z = 3; } /* okay */
if (!z) { *z = 3; } /* 7. Possible dereference of null pointer: *z */
else { *z = 4; } /* okay */
z4 = (int *)malloc (sizeof (int));
if (z4 == NULL) { *z4 = 3; } /* 8. Possible dereference of null pointer: *z4 */
else { free (z4); } /* [ not any more: 12. Clauses exit... ] */
if (!(z2 != NULL)) { *z2 = 3; } /* 9. Possible dereference of null pointer: *z2 */
if (z3 != NULL) { *z3 = 5; /* okay */ }
else { *z3 = 3; } /* 10. Possible dereference of null pointer: *z3 */
if (z2) free (z2);
z2 = (int *)malloc (sizeof (int));
if (z2 != NULL) { *z2 = 5; } ;
*z2 = 7; /* 11. Possible dereference of null pointer: *z2 */
z5 = (int *) malloc (sizeof (int));
if (ptrpred(z5)) { *z5 = 3; } /* 12. Possible dereference of null pointer: *z5 */
if (!ptrpred(z5)) { *z5 = 3; }
if (ptrpred(z5)) { *z5 = 3; }
else { free (z5); }
free (z2);
return z; /* 13. Fresh storage z3 not released */
}
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