commit ed983107bbc62245b06b99f02e69acf36a0baa3e

Author: H.J. Lu <hjl.tools@gmail.com>

Date:   Wed May 23 03:59:56 2018 -0700

    Add a test case for [BZ #23196]

            [BZ #23196]

            * string/test-memcpy.c (do_test1): New function.

            (test_main): Call it.

diff --git a/string/test-memcpy.c b/string/test-memcpy.c

index d252400bf5254eee..10a09d0b0fb50dc5 100644

--- a/string/test-memcpy.c

+++ b/string/test-memcpy.c

@@ -206,6 +206,50 @@ do_random_tests (void)

     }

 }

+static void

+do_test1 (void)

+{

+  size_t size = 0x100000;

+  void *large_buf;

+

+  large_buf = mmap (NULL, size * 2 + page_size, PROT_READ | PROT_WRITE,

+		    MAP_PRIVATE | MAP_ANON, -1, 0);

+  if (large_buf == MAP_FAILED)

+    {

+      puts ("Failed to allocat large_buf, skipping do_test1");

+      return;

+    }

+

+  if (mprotect (large_buf + size, page_size, PROT_NONE))

+    error (EXIT_FAILURE, errno, "mprotect failed");

+

+  size_t arrary_size = size / sizeof (uint32_t);

+  uint32_t *dest = large_buf;

+  uint32_t *src = large_buf + size + page_size;

+  size_t i;

+

+  for (i = 0; i < arrary_size; i++)

+    src[i] = (uint32_t) i;

+

+  FOR_EACH_IMPL (impl, 0)

+    {

+      memset (dest, -1, size);

+      CALL (impl, (char *) dest, (char *) src, size);

+      for (i = 0; i < arrary_size; i++)

+	if (dest[i] != src[i])

+	  {

+	    error (0, 0,

+		   "Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",

+		   impl->name, dest, src, i);

+	    ret = 1;

+	    break;

+	  }

+    }

+

+  munmap ((void *) dest, size);

+  munmap ((void *) src, size);

+}

+

 int

 test_main (void)

 {

@@ -247,6 +291,9 @@ test_main (void)

   do_test (0, 0, getpagesize ());

   do_random_tests ();

+

+  do_test1 ();

+

   return ret;

 }