Add explanatory comments to userprog tests.

[pintos-anon] / src / tests / userprog / wait-bad-pid.c

diff --git a/src/tests/userprog/wait-bad-pid.c b/src/tests/userprog/wait-bad-pid.c
index 12a2ae4bd0cc6ca0592f6c3e1d2027c6e4713052..3fe8ee4b3709f127e7a652fe593f7b7c2718c01c 100644 (file)
--- a/src/tests/userprog/wait-bad-pid.c
+++ b/src/tests/userprog/wait-bad-pid.c
@@ -1,3 +1,6 @@
+/* Waits for an invalid pid.  This may fail or terminate the
+   process with -1 exit code. */
+
 #include <syscall.h>
 #include "tests/main.h"