1 files changed, 68 insertions, 0 deletions
diff --git a/tests/test-random_r.c b/tests/test-random_r.c
new file mode 100644
index 00000000..19f570d7
--- /dev/null
+++ b/tests/test-random_r.c
@@ -0,0 +1,68 @@
+/* Test random_r.
+   Copyright (C) 2008-2024 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (srandom_r, int, (unsigned int, struct random_data *));
+SIGNATURE_CHECK (initstate_r, int, (unsigned int, char *, size_t,
+                                    struct random_data *));
+SIGNATURE_CHECK (setstate_r, int, (char *, struct random_data *));
+SIGNATURE_CHECK (random_r, int, (struct random_data *, int32_t *));
+
+#include <time.h>
+
+#include "macros.h"
+
+/* Note: This test crashes on glibc/SPARC systems.
+   Reported at <https://sourceware.org/bugzilla/show_bug.cgi?id=30584>.  */
+
+static int
+test_failed (int alignment)
+{
+  struct random_data rand_state;
+  char buf[128 + sizeof (int32_t)];
+  unsigned int i;
+  unsigned int n_big = 0;
+
+  rand_state.state = NULL;
+  if (initstate_r (time (NULL), buf + alignment, sizeof buf - alignment,
+                   &rand_state))
+    return 1;
+  for (i = 0; i < 1000; i++)
+    {
+      int32_t r;
+      ASSERT (random_r (&rand_state, &r) == 0);
+      ASSERT (0 <= r);
+      if (RAND_MAX / 2 < r)
+        ++n_big;
+    }
+
+  /* Fail if none of the numbers were larger than RAND_MAX / 2.  */
+  return !n_big;
+}
+
+int
+main ()
+{
+  int alignment;
+  for (alignment = 0; alignment < sizeof (int32_t); alignment++)
+    if (test_failed (alignment))
+      return 1;
+  return 0;
+}