Add explanatory comments to vm tests.

[pintos-anon] / src / tests / vm / child-mm-wrt.c

diff --git a/src/tests/vm/child-mm-wrt.c b/src/tests/vm/child-mm-wrt.c
index 937272903b045731d387cd38ffeceb9c2e64ac07..8419788f79866df3db1f2b396e8c2092ebfdf1f2 100644 (file)
--- a/src/tests/vm/child-mm-wrt.c
+++ b/src/tests/vm/child-mm-wrt.c
@@ -1,3 +1,8 @@
+/* Child process of mmap-exit.
+   Mmaps a file and writes to it via the mmap'ing, then exits
+   without calling munmap.  The data in the mapped region must be
+   written out at program termination. */
+
 #include <string.h>
 #include <syscall.h>
 #include "tests/vm/sample.inc"