1 files changed, 63 insertions, 0 deletions
diff --git a/gnulib-tests/test-alignalloc.c b/gnulib-tests/test-alignalloc.c
new file mode 100644
index 0000000..eccaea0
--- /dev/null
+++ b/gnulib-tests/test-alignalloc.c
@@ -0,0 +1,63 @@
+/* Test alignalloc and alignfree.
+
+   Copyright 2022 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 <alignalloc.h>
+
+#include <stdint.h>
+#include <string.h>
+#include "intprops.h"
+
+#include "signature.h"
+SIGNATURE_CHECK (alignalloc, void *, (idx_t, idx_t));
+SIGNATURE_CHECK (alignfree, void, (void *));
+
+#include "macros.h"
+
+static void
+test_alignalloc (idx_t alignment, idx_t size)
+{
+  void *p = alignalloc (alignment, size);
+  if (p)
+    {
+      memset (p, 0, size);
+      ASSERT ((uintptr_t) p % alignment == 0);
+    }
+  alignfree (p);
+}
+
+int
+main ()
+{
+  /* Check that alignalloc returns properly aligned storage when it succeeds.
+     Stop at 16 MiB alignments because circa-2022 AddressSanitizer goes
+     catatonic with large alignments in posix_memalign,
+     and there seems to be little point to testing them.  */
+  for (idx_t alignment = 1; alignment <= 16 * 1024 * 1024; alignment *= 2)
+    for (idx_t size = 1; size <= 1024; size *= 2)
+      {
+        test_alignalloc (alignment, size - 1);
+        test_alignalloc (alignment, size);
+        test_alignalloc (alignment, size + 1);
+      }
+
+  /* Check that alignfree is a no-op on null pointers.  */
+  alignfree (NULL);
+
+  return 0;
+}