free parent_child when possible

1 files changed, 9 insertions, 1 deletions

diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 0df46f4..177cf02 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -69,7 +69,7 @@ get_fd (struct thread *thread, int fd_i)
 }
 
 static void
-exit (int status UNUSED)
+exit (int status)
 {
   struct thread *thread = thread_current ();
 
@@ -83,6 +83,14 @@ exit (int status UNUSED)
     }
     free (thread->fds);
   }
+
+  lock_acquire (&thread->parent->l);
+  thread->parent->exit_status = status;
+  lock_release (&thread->parent->l);
+
+  printf("%s: exit(%d)\n", thread->name, status);
+
+  thread_exit ();
 }
 
 static int