- d_allocated = 2 * d_allocated;
- memory = realloc (d->dir, d_allocated * sizeof (DIRECTIVE));
+ d_allocated = xtimes (d_allocated, 2);
+ memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
+ if (size_overflow_p (memory_size))
+ /* Overflow, would lead to out of memory. */
+ goto error;
+ memory = realloc (d->dir, memory_size);