Function zrealloc

app/redis-6.2.6/src/zmalloc.c:249–253

Reallocate memory and zero it or panic */

/* Reallocate memory and zero it or panic */
void *zrealloc(void *ptr, size_t size) {
    ptr = ztryrealloc_usable(ptr, size, NULL);
    if (!ptr && size != 0) zmalloc_oom_handler(size);
    return ptr;
}

/* Try Reallocating memory, and return NULL if failed. */
void *ztryrealloc(void *ptr, size_t size) {