From dae253912c37072030c8dca9f4ad2cef00722d30 Mon Sep 17 00:00:00 2001
From: h2-addad <hamza2.addad@live.uwe.ac.uk>
Date: Sun, 16 Jul 2023 15:16:59 +0000
Subject: [PATCH] Upload New File
---
src/tests/vm/mmap-over-data.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
create mode 100644 src/tests/vm/mmap-over-data.c
diff --git a/src/tests/vm/mmap-over-data.c b/src/tests/vm/mmap-over-data.c
new file mode 100644
index 0000000..9ea5d49
--- /dev/null
+++ b/src/tests/vm/mmap-over-data.c
@@ -0,0 +1,21 @@
+/* Verifies that mapping over the data segment is disallowed. */
+
+#include <stdint.h>
+#include <round.h>
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+static char x;
+
+void
+test_main (void)
+{
+ uintptr_t x_page = ROUND_DOWN ((uintptr_t) &x, 4096);
+ int handle;
+
+ CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
+ CHECK (mmap (handle, (void *) x_page) == MAP_FAILED,
+ "try to mmap over data segment");
+}
+
--
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