CORRECTNESS [[total]]
---------------------

Argument passing
  -3 args-argc: argc is not set correctly
  -3 args-argv0: executable name not passed as argv[0]
  -3 args-argvn: argv[argc] is not a null pointer
  -3 args-single: passing single argument fails
  -3 args-multiple: passing multiple arguments fails
  -3 args-dbl-space: using multiple spaces between arguments fails
Score: /18

System calls
  -3 sc-bad-sp: system call with a bad stack pointer must not crash OS
  -3 sc-bad-arg: syscall with argument off top of stack must not crash OS
  -3 sc-boundary: syscall with args across page boundary must work
Score: /9

System calls: halt, exec 
  -1 halt: halt system call fails
  -2 exit: exit system call malfunctions
Score: /3

System calls: create
  -2 create-normal: create a file in the most normal way
  -1 create-empty: pass empty string to create system call
  -1 create-null: pass null pointer to create system call
  -1 create-bad-ptr: pass invalid pointer to create system call
  -1 create-long: pass long file name to create system call
  -1 create-exists: pass name of an existing file to create system call
  -1 create-bound: pass name of file crossing page boundary
Score: /8

System calls: open
  -2 open-normal: open a file in the most normal way
  -2 open-missing: try to open a file that doesn't exist
  -2 open-boundary: pass name of file crossing page boundary
  -1 open-empty: pass empty string to open system call
  -1 open-null: pass null pointer to open system call
  -1 open-bad-ptr: pass invalid pointer to open system call
  -1 open-twice: open the same file twice
Score: /10

System calls: close
  -2 close-normal: close an open file in the most normal way
  -2 close-twice: try to close an open file twice
  -1 close-stdin: try to close stdin
  -1 close-stdout: try to close stdout
  -1 close-bad-fd: try to close invalid file descriptor
Score: /7

System calls: read
  -2 read-normal: read from open file in most normal way
  -2 read-bad-ptr: pass invalid pointer to read system call
  -2 read-boundary: pass buffer crossing page boundary
  -1 read-zero: try to read zero bytes
  -1 read-stdout: try to read from stdout
  -1 read-bad-fd: try to read from invalid file descriptor
Score: /9

System calls: write
  -2 write-normal: write to open file in most normal way
  -2 write-bad-ptr: pass invalid pointer to write system call
  -2 write-boundary: pass buffer crossing page boundary
  -1 write-zero: try to write zero bytes
  -1 write-stdin: try to write to stdin
  -1 write-bad-fd: try to write to invalid file descriptor
Score: /9

System calls: exec
  -2 exec-once: call exec/join once
  -2 exec-arg: check command-line passing on exec
  -2 exec-multiple: call exec/join multiple times
  -2 exec-missing: exec of nonexistent file must return -1
  -1 exec-bad-ptr: pass invalid pointer to exec system call
Score: /9

System calls: join
  -2 join-simple: join must return proper value
  -2 join-twice: join a subprocess two times
  -2 join-killed: join must return -1 if subprocess killed by kernel
  -1 join-bad-pid: join must return if passed bad pid
Score: /7

Multiprogramming
  -2 multi-recurse: test recursively executing subprocesses
  -2 multi-oom: exhausting user memory must not crash OS
  -2 multi-fragment: programs must load even if user memory is fragmented
  -2 multi-parent-fd: child must not be able to close parent's fds
Score: /8