1 files changed, 120 insertions, 0 deletions
diff --git a/string/test/memcpy.c b/string/test/memcpy.c
new file mode 100644
index 000000000000..ce0ceeef5ee8
--- /dev/null
+++ b/string/test/memcpy.c
@@ -0,0 +1,120 @@
+/*
+ * memcpy test.
+ *
+ * Copyright (c) 2019-2020, Arm Limited.
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "mte.h"
+#include "stringlib.h"
+#include "stringtest.h"
+
+#define F(x, mte) {#x, x, mte},
+
+static const struct fun
+{
+  const char *name;
+  void *(*fun) (void *, const void *, size_t);
+  int test_mte;
+} funtab[] = {
+  // clang-format off
+  F(memcpy, 0)
+#if __aarch64__
+  F(__memcpy_aarch64, 1)
+# if __ARM_NEON
+  F(__memcpy_aarch64_simd, 1)
+# endif
+#elif __arm__
+  F(__memcpy_arm, 0)
+#endif
+  {0, 0, 0}
+  // clang-format on
+};
+#undef F
+
+#define A 32
+#define LEN 250000
+static unsigned char *dbuf;
+static unsigned char *sbuf;
+static unsigned char wbuf[LEN + 2 * A];
+
+static void *
+alignup (void *p)
+{
+  return (void *) (((uintptr_t) p + A - 1) & -A);
+}
+
+static void
+test (const struct fun *fun, int dalign, int salign, int len)
+{
+  unsigned char *src = alignup (sbuf);
+  unsigned char *dst = alignup (dbuf);
+  unsigned char *want = wbuf;
+  unsigned char *s = src + salign;
+  unsigned char *d = dst + dalign;
+  unsigned char *w = want + dalign;
+  void *p;
+  int i;
+
+  if (err_count >= ERR_LIMIT)
+    return;
+  if (len > LEN || dalign >= A || salign >= A)
+    abort ();
+  for (i = 0; i < len + A; i++)
+    {
+      src[i] = '?';
+      want[i] = dst[i] = '*';
+    }
+  for (i = 0; i < len; i++)
+    s[i] = w[i] = 'a' + i % 23;
+
+  s = tag_buffer (s, len, fun->test_mte);
+  d = tag_buffer (d, len, fun->test_mte);
+  p = fun->fun (d, s, len);
+  untag_buffer (s, len, fun->test_mte);
+  untag_buffer (d, len, fun->test_mte);
+
+  if (p != d)
+    ERR ("%s(%p,..) returned %p\n", fun->name, d, p);
+  for (i = 0; i < len + A; i++)
+    {
+      if (dst[i] != want[i])
+	{
+	  ERR ("%s(align %d, align %d, %d) failed\n", fun->name, dalign, salign,
+	       len);
+	  quoteat ("got", dst, len + A, i);
+	  quoteat ("want", want, len + A, i);
+	  break;
+	}
+    }
+}
+
+int
+main ()
+{
+  dbuf = mte_mmap (LEN + 2 * A);
+  sbuf = mte_mmap (LEN + 2 * A);
+  int r = 0;
+  for (int i = 0; funtab[i].name; i++)
+    {
+      err_count = 0;
+      for (int d = 0; d < A; d++)
+	for (int s = 0; s < A; s++)
+	  {
+	    int n;
+	    for (n = 0; n < 100; n++)
+	      test (funtab + i, d, s, n);
+	    for (; n < LEN; n *= 2)
+	      test (funtab + i, d, s, n);
+	  }
+      char *pass = funtab[i].test_mte && mte_enabled () ? "MTE PASS" : "PASS";
+      printf ("%s %s\n", err_count ? "FAIL" : pass, funtab[i].name);
+      if (err_count)
+	r = -1;
+    }
+  return r;
+}