1 files changed, 23 insertions, 0 deletions
diff --git a/src/tests/vm/mmap-unmap.c b/src/tests/vm/mmap-unmap.c
new file mode 100644
index 0000000..d35a79e
--- /dev/null
+++ b/src/tests/vm/mmap-unmap.c
@@ -0,0 +1,23 @@
+/* Maps and unmaps a file and verifies that the mapped region is
+   inaccessible afterward. */
+
+#include <syscall.h>
+#include "tests/vm/sample.inc"
+#include "tests/lib.h"
+#include "tests/main.h"
+
+#define ACTUAL ((void *) 0x10000000)
+
+void
+test_main (void)
+{
+  int handle;
+  mapid_t map;
+
+  CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
+  CHECK ((map = mmap (handle, ACTUAL)) != MAP_FAILED, "mmap \"sample.txt\"");
+
+  munmap (map);
+
+  fail ("unmapped memory is readable (%d)", *(int *) ACTUAL);
+}