Add a generic malloc test for MALLOC_ALIGNMENT

1. Add sysdeps/generic/malloc-size.h to define size related macros for
malloc.
2. Move x86_64/tst-mallocalign1.c to malloc and replace ALIGN_MASK with
MALLOC_ALIGN_MASK.
3. Add tst-mallocalign1 to tests-exclude-mcheck for i386 and x32 since
mcheck doesn't honor MALLOC_ALIGNMENT.

1 files changed, 71 insertions, 0 deletions

diff --git a/malloc/tst-mallocalign1.c b/malloc/tst-mallocalign1.c
new file mode 100644
index 0000000000..294e821afe
--- /dev/null
+++ b/malloc/tst-mallocalign1.c
@@ -0,0 +1,71 @@
+/* Verify that MALLOC_ALIGNMENT is honored by malloc.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <malloc-size.h>
+
+static void *
+test (size_t s)
+{
+  void *p = malloc (s);
+
+  printf ("malloc: %zu, %p: %zu\n", s, p,
+	  ((uintptr_t) p) & MALLOC_ALIGN_MASK);
+  return p;
+}
+
+static int
+do_test (void)
+{
+  void *p;
+  int ret = 0;
+
+  p = test (2);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (8);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (13);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (16);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (23);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (43);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  p = test (123);
+  ret |= (uintptr_t) p & MALLOC_ALIGN_MASK;
+  free (p);
+
+  return ret;
+}
+
+#include <support/test-driver.c>