Function realloc

examples/stdlib.c:2399–2402

    return calloc_impl(NULL, nmemb, size, /*lock=*/true);
}
static void *realloc(void *ptr, size_t size)
{
    return realloc_impl(NULL, ptr, size, /*lock=*/true);
}
static void free(void *ptr)
{
    free_impl(NULL, ptr, /*lock=*/true);