Add explanatory comments to userprog tests.

[pintos-anon] / src / tests / userprog / exec-missing.c

diff --git a/src/tests/userprog/exec-missing.c b/src/tests/userprog/exec-missing.c
index 53617e0c3167defa7a3a30bccdd6e3321d7b9857..bf08cad14678c17fbcc611578f8e56c5f7948235 100644 (file)
--- a/src/tests/userprog/exec-missing.c
+++ b/src/tests/userprog/exec-missing.c
@@ -1,3 +1,6 @@
+/* Tries to execute a nonexistent process.
+   The exec system call must return -1. */
+
 #include <syscall.h>
 #include "tests/lib.h"
 #include "tests/main.h"