From 84d40d702fb094dda8fb8b7fd4d8042b03ac23ac Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 14 May 2021 15:23:46 -0700
Subject: Add static tests for __clone_internal

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 .../unix/sysv/linux/tst-misalign-clone-internal.c  | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 sysdeps/unix/sysv/linux/tst-misalign-clone-internal.c

(limited to 'sysdeps/unix/sysv/linux/tst-misalign-clone-internal.c')

diff --git a/sysdeps/unix/sysv/linux/tst-misalign-clone-internal.c b/sysdeps/unix/sysv/linux/tst-misalign-clone-internal.c
new file mode 100644
index 0000000000..5e34160238
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-misalign-clone-internal.c
@@ -0,0 +1,74 @@
+/* Verify that __clone_internal properly aligns the child stack.
+   Copyright (C) 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 <sched.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <libc-pointer-arith.h>
+#include <tst-stack-align.h>
+#include <clone_internal.h>
+#include <support/xunistd.h>
+#include <support/check.h>
+
+static int
+check_stack_alignment (void *arg)
+{
+  puts ("in f");
+
+  return TEST_STACK_ALIGN () ? 1 : 0;
+}
+
+static int
+do_test (void)
+{
+  puts ("in do_test");
+
+  if (TEST_STACK_ALIGN ())
+    FAIL_EXIT1 ("stack isn't aligned\n");
+
+#ifdef __ia64__
+# define STACK_SIZE (256 * 1024)
+#else
+# define STACK_SIZE (128 * 1024)
+#endif
+  char st[STACK_SIZE + 1];
+  /* NB: Align child stack to 1 byte.  */
+  char *stack = PTR_ALIGN_UP (&st[0], 2) + 1;
+  struct clone_args clone_args =
+    {
+      .stack = (uintptr_t) stack,
+      .stack_size = STACK_SIZE,
+    };
+  pid_t p = __clone_internal (&clone_args, check_stack_alignment, 0);
+
+  /* Clone must not fail.  */
+  TEST_VERIFY_EXIT (p != -1);
+
+  int e;
+  xwaitpid (p, &e, __WCLONE);
+  TEST_VERIFY (WIFEXITED (e));
+  TEST_COMPARE (WEXITSTATUS (e), 0);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
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