From cf6c40b8881cfe78e134e2919b184e04025c1e25 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@uclibc-ng.org>
Date: Tue, 26 Apr 2016 19:43:48 +0200
Subject: test: add memmove test
Triggers a bug in MIPS code under certain circumstances, which
are unclear at the moment.
---
test/string/tst-memmove.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 test/string/tst-memmove.c
(limited to 'test/string')
diff --git a/test/string/tst-memmove.c b/test/string/tst-memmove.c
new file mode 100644
index 000000000..799e72e33
--- /dev/null
+++ b/test/string/tst-memmove.c
@@ -0,0 +1,44 @@
+# Copyright (C) 2016 Rene Nielsen <rene.nielsen@microsemi.com>
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+#include <string.h>
+#include <stdio.h>
+
+#define LEN 1024
+
+int main(int argc, char *argv[])
+{
+ unsigned char a[LEN], exp;
+ int i, move_len, move_src, err = 0;
+
+ // Fill the array with increasing values from 0 to LEN - 1 (wrap is fine)
+ for (i = 0; i < LEN; i++) {
+ a[i] = i;
+ }
+
+ // move_src is the index into the array to move from.
+ // move_len is the number of indices to move. Here, we take the remainder.
+ move_src = LEN / 64;
+ move_len = LEN - move_src;
+
+ printf("Moving %d entries from index %d to 0\n", move_len, move_src);
+ memmove(a, &a[move_src], sizeof(a[0]) * move_len);
+
+ // Check that the memmove went well
+ for (i = 0; i < LEN; i++) {
+ // Expect that the first #move_len entries contain increasing values
+ // starting at #move_src and the last #move_src entries are untouched.
+ exp = i >= move_len ? i : i + move_src;
+ if (a[i] != exp) {
+ printf("Error: memmove() failed. Expected a[%d] = %u, got %u\n", i, exp, a[i]);
+ err = 1;
+ }
+ }
+
+ if (!err) {
+ printf("memmove() succeeded\n");
+ }
+
+ return err;
+}
+
--
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