From 6521505a352e77bb72c494442fcbe4ea14c8cb95 Mon Sep 17 00:00:00 2001
From: h2-addad <hamza2.addad@live.uwe.ac.uk>
Date: Sun, 16 Jul 2023 15:19:04 +0000
Subject: [PATCH] Upload New File
---
src/tests/vm/mmap-shuffle.c | 38 +++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 src/tests/vm/mmap-shuffle.c
diff --git a/src/tests/vm/mmap-shuffle.c b/src/tests/vm/mmap-shuffle.c
new file mode 100644
index 0000000..29921ad
--- /dev/null
+++ b/src/tests/vm/mmap-shuffle.c
@@ -0,0 +1,38 @@
+/* Creates a 128 kB file and repeatedly shuffles data in it
+ through a memory mapping. */
+
+#include <stdio.h>
+#include <string.h>
+#include <syscall.h>
+#include "tests/arc4.h"
+#include "tests/cksum.h"
+#include "tests/lib.h"
+#include "tests/main.h"
+
+#define SIZE (128 * 1024)
+
+static char *buf = (char *) 0x10000000;
+
+void
+test_main (void)
+{
+ size_t i;
+ int handle;
+
+ /* Create file, mmap. */
+ CHECK (create ("buffer", SIZE), "create \"buffer\"");
+ CHECK ((handle = open ("buffer")) > 1, "open \"buffer\"");
+ CHECK (mmap (handle, buf) != MAP_FAILED, "mmap \"buffer\"");
+
+ /* Initialize. */
+ for (i = 0; i < SIZE; i++)
+ buf[i] = i * 257;
+ msg ("init: cksum=%lu", cksum (buf, SIZE));
+
+ /* Shuffle repeatedly. */
+ for (i = 0; i < 10; i++)
+ {
+ shuffle (buf, SIZE, 1);
+ msg ("shuffle %zu: cksum=%lu", i, cksum (buf, SIZE));
+ }
+}
--
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