lastaddr         2067 user/usertests.c   char *c, *oldbrk, *a, *lastaddr, *p;
lastaddr         2081 user/usertests.c   lastaddr = (char*) (BIG-1);
lastaddr         2082 user/usertests.c   *lastaddr = 99;
lastaddr         2104 user/usertests.c   if(*lastaddr == 99){