/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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

   <http://www.gnu.org/licenses/>.  */

#include <pthread.h>

#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <inttypes.h>

#include <support/support.h>

#include <support/check.h>

#include <support/xthread.h>

struct test_s

{

  __attribute__ ((aligned(0x20))) int a;

  __attribute__ ((aligned(0x200))) int b;

};

#define INIT_A 1

#define INIT_B 42

/* Deliberately not static.  */

__thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =

{

  .a = INIT_A,

  .b = INIT_B

};

/* Use noinline in combination with not static to ensure that the

   alignment check is really done.  Otherwise it was optimized out!  */

__attribute__ ((noinline)) void

check_alignment (const char *thr_name, const char *ptr_name,

		 int *ptr, int alignment)

{

  uintptr_t offset_aligment = ((uintptr_t) ptr) & (alignment - 1);

  if (offset_aligment)

    {

      FAIL_EXIT1 ("%s (%p) is not 0x%x-byte aligned in %s thread\n",

		  ptr_name, ptr, alignment, thr_name);

    }

}

static void

check_s (const char *thr_name)

{

  if (s.a != INIT_A || s.b != INIT_B)

    FAIL_EXIT1 ("initial value of s in %s thread wrong\n", thr_name);

  check_alignment (thr_name, "s.a", &s.a, 0x20);

  check_alignment (thr_name, "s.b", &s.b, 0x200);

}

static void *

tf (void *arg)

{

  check_s ("child");

  ++s.a;

  return NULL;

}

int

do_test (void)

{

  check_s ("main");

  pthread_attr_t a;

  xpthread_attr_init (&a);

#define STACK_SIZE (1 * 1024 * 1024)

  xpthread_attr_setstacksize (&a, STACK_SIZE);

#define N 10

  int i;

  for (i = 0; i < N; ++i)

    {

#define M 10

      pthread_t th[M];

      int j;

      for (j = 0; j < M; ++j, ++s.a)

	th[j] = xpthread_create (&a, tf, NULL);

      for (j = 0; j < M; ++j)

	xpthread_join (th[j]);

    }

  /* Also check the alignment of the tls variables if a misaligned stack is

     specified.  */

  pthread_t th;

  void *thr_stack = NULL;

  thr_stack = xposix_memalign (0x200, STACK_SIZE + 1);

  xpthread_attr_setstack (&a, thr_stack + 1, STACK_SIZE);

  th = xpthread_create (&a, tf, NULL);

  xpthread_join (th);

  free (thr_stack);

  xpthread_attr_destroy (&a);

  return 0;

}

#include <support/test-driver.c>