1 files changed, 32 insertions, 0 deletions

diff --git a/tests/vm/mmap-inherit.c b/tests/vm/mmap-inherit.c
new file mode 100644
index 0000000..7fa9607
--- /dev/null
+++ b/tests/vm/mmap-inherit.c
@@ -0,0 +1,32 @@
+/* Maps a file into memory and runs child-inherit to verify that
+   mappings are not inherited. */
+
+#include <string.h>
+#include <syscall.h>
+#include "tests/vm/sample.inc"
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void)
+{
+  char *actual = (char *) 0x54321000;
+  int handle;
+  pid_t child;
+
+  /* Open file, map, verify data. */
+  CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
+  CHECK (mmap (handle, actual) != MAP_FAILED, "mmap \"sample.txt\"");
+  if (memcmp (actual, sample, strlen (sample)))
+    fail ("read of mmap'd file reported bad data");
+
+  /* Spawn child and wait. */
+  CHECK ((child = exec ("child-inherit")) != -1, "exec \"child-inherit\"");
+  quiet = true;
+  CHECK (wait (child) == -1, "wait for child (should return -1)");
+  quiet = false;
+
+  /* Verify data again. */
+  CHECK (!memcmp (actual, sample, strlen (sample)),
+         "checking that mmap'd file still has same data");
+}