1 files changed, 45 insertions, 0 deletions
diff --git a/test/string/tst-strlen.c b/test/string/tst-strlen.c
new file mode 100644
index 000000000..a1e115927
--- /dev/null
+++ b/test/string/tst-strlen.c
@@ -0,0 +1,45 @@
+/* Make sure we don't test the optimized inline functions if we want to
+   test the real implementation.  */
+#undef __USE_STRING_INLINES
+
+#include <stdio.h>
+#include <string.h>
+
+int
+main(int argc, char *argv[])
+{
+  static const size_t lens[] = { 0, 1, 0, 2, 0, 1, 0, 3,
+				 0, 1, 0, 2, 0, 1, 0, 4 };
+  char basebuf[24 + 32];
+  size_t base;
+
+  for (base = 0; base < 32; ++base)
+    {
+      char *buf = basebuf + base;
+      size_t words;
+
+      for (words = 0; words < 4; ++words)
+	{
+	  size_t last;
+	  memset (buf, 'a', words * 4);
+
+	  for (last = 0; last < 16; ++last)
+	    {
+	      buf[words * 4 + 0] = (last & 1) != 0 ? 'b' : '\0';
+	      buf[words * 4 + 1] = (last & 2) != 0 ? 'c' : '\0';
+	      buf[words * 4 + 2] = (last & 4) != 0 ? 'd' : '\0';
+	      buf[words * 4 + 3] = (last & 8) != 0 ? 'e' : '\0';
+	      buf[words * 4 + 4] = '\0';
+
+	      if (strlen (buf) != words * 4 + lens[last]
+		  || strnlen (buf, -1) != words * 4 + lens[last])
+		{
+		  printf ("failed for base=%Zu, words=%Zu, and last=%Zu\n",
+			  base, words, last);
+		  return 1;
+		}
+	    }
+	}
+    }
+  return 0;
+}