Add explanatory comments to userprog tests.

[pintos-anon] / src / tests / userprog / sc-bad-sp.c

diff --git a/src/tests/userprog/sc-bad-sp.c b/src/tests/userprog/sc-bad-sp.c
index 2ae20e96d01cd63b2f421feb1786af2fcb40f9db..56a5b8d4b8ee09a00a26875cfae44848215755d7 100644 (file)
--- a/src/tests/userprog/sc-bad-sp.c
+++ b/src/tests/userprog/sc-bad-sp.c
@@ -1,3 +1,7 @@
+/* Invokes a system call with the stack pointer (%esp) set to a
+   bad address.  The process must be terminated with -1 exit
+   code. */
+
 #include "tests/lib.h"
 #include "tests/main.h"