include: <errno.h>
include: <stdlib.h>
fiu name base: libc/mm/
void *malloc(size_t size);
on error: NULL
valid errnos: ENOMEM
void *calloc(size_t nmemb, size_t size);
on error: NULL
valid errnos: ENOMEM
void *realloc(void *ptr, size_t size);
on error: NULL
valid errnos: ENOMEM
# Note we don't wrap free() as it does not return anything.