lastaddr         2098 user/usertests.c   char *c, *oldbrk, *a, *lastaddr, *p;
lastaddr         2113 user/usertests.c   lastaddr = (char *)(BIG - 1);
lastaddr         2114 user/usertests.c   *lastaddr = 99;
lastaddr         2137 user/usertests.c   if (*lastaddr == 99) {