Clean tests/vm/zeros.

[pintos-anon] / src / tests / vm / mmap-zero.c

diff --git a/src/tests/vm/mmap-zero.c b/src/tests/vm/mmap-zero.c
index 8b399c4d7b34d0e3b4796905910955f956efa9ff..368b759d48e0d989253a145de2c55c3f7b6ad066 100644 (file)
--- a/src/tests/vm/mmap-zero.c
+++ b/src/tests/vm/mmap-zero.c
@@ -1,3 +1,8 @@
+/* Tries to map a zero-length file, which may or may not work but
+   should not terminate the process or crash.
+   Then dereferences the address that we tried to map,
+   and the process must be terminated with -1 exit code. */
+
 #include <syscall.h>
 #include "tests/lib.h"
 #include "tests/main.h"