string: Make tests birdirectional test-memcpy.c

This commit updates the memcpy tests to test both dst > src and dst <
src. This is because there is logic in the code based on the

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

1 files changed, 73 insertions, 2 deletions

diff --git a/string/test-memmove.c b/string/test-memmove.c
index a0ce8b0334..5c6d1579e3 100644
--- a/string/test-memmove.c
+++ b/string/test-memmove.c
@@ -100,11 +100,11 @@ do_test (size_t align1, size_t align2, size_t len)
   size_t i, j;
   char *s1, *s2;
 
-  align1 &= 63;
+  align1 &= (getpagesize() - 1);
   if (align1 + len >= page_size)
     return;
 
-  align2 &= 63;
+  align2 &= (getpagesize() - 1);
   if (align2 + len >= page_size)
     return;
 
@@ -355,6 +355,51 @@ do_test3 (size_t bytes_move, size_t offset)
   munmap ((void *) buf, size);
 }
 
+static void
+do_test4 (size_t bytes_move, size_t offset1, size_t offset2)
+{
+  size_t size, repeats, i;
+  uint8_t *buf, *dst, *src;
+
+  size = bytes_move + MAX(offset1, offset2);
+  buf  = mmap(NULL, size, PROT_READ | PROT_WRITE,
+             MAP_PRIVATE | MAP_ANON, -1, 0);
+
+  if (buf == MAP_FAILED)
+    error (EXIT_UNSUPPORTED, errno, "mmap failed");
+
+  dst = &buf[offset1];
+  src = &buf[offset2];
+  for (repeats = 0; repeats < 2; ++repeats)
+    {
+      FOR_EACH_IMPL (impl, 0)
+        {
+          for (i = 0; i < bytes_move; i++)
+              src[i] = (uint8_t) i;
+#ifdef TEST_BCOPY
+          CALL (impl, (char *) src, (char *) dst, bytes_move);
+#else
+          CALL (impl, (char *) dst, (char *) src, bytes_move);
+#endif
+          for (i = 0; i < bytes_move; i++)
+            {
+              if (dst[i] != (uint8_t) i)
+                {
+                  error (0, 0,
+                         "Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
+                         impl->name, dst, buf, i);
+                  ret = 1;
+                  break;
+                }
+            }
+        }
+      dst = &buf[offset2];
+      src = &buf[offset1];
+    }
+  munmap ((void *) buf, size);
+}
+
+
 int
 test_main (void)
 {
@@ -395,13 +440,39 @@ test_main (void)
 
   do_random_tests ();
 
+  do_test2 (0);
   do_test2 (33);
+  do_test2 (0x200000 - 1);
   do_test2 (0x200000);
+  do_test2 (0x200000 + 1);
+  do_test2 (0x1000000 - 1);
+  do_test2 (0x1000000);
+  do_test2 (0x1000000 + 1);
   do_test2 (0x4000000 - 1);
   do_test2 (0x4000000);
+  do_test2 (0x4000000 + 1);
 
   /* Copy 16KB data.  */
   do_test3 (16384, 3);
+  for (i = 4096; i <= 16384; i <<= 1)
+    {
+      do_test4 (i, 0, i);
+      do_test4 (i, 0, i - 1);
+      do_test4 (i, 0, i + 1);
+      do_test4 (i, 63, i + 63);
+      do_test4 (i, 63, i + 64);
+      do_test4 (i, 63, i);
+
+      do_test4 (i, 0, 1);
+      do_test4 (i, 0, 15);
+      do_test4 (i, 0, 31);
+      do_test4 (i, 0, 63);
+      do_test4 (i, 0, 64);
+      do_test4 (i, 0, 65);
+      do_test4 (i, 0, 127);
+      do_test4 (i, 0, 129);
+    }
+
 
   return ret;
 }