/* Test size of the static TLS surplus reservation for backwards compatibility.

   Copyright (C) 2020 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 <support/check.h>

#include <support/xdlfcn.h>

static int do_test (void);

#include <support/test-driver.c>

/* This hack results in a definition of struct rtld_global_ro.  Do

   this after all the other header inclusions, to minimize the

   impact.  */

#define SHARED

#include <ldsodefs.h>

static

int do_test (void)

{

  /* Avoid introducing a copy relocation due to the hidden alias in

     ld.so.  */

  struct rtld_global_ro *glro = xdlsym (NULL, "_rtld_global_ro");

  printf ("info: _dl_tls_static_surplus: %zu\n", glro->_dl_tls_static_surplus);

  /* Hisoric value: 16 * 100 + 64.  */

  TEST_VERIFY (glro->_dl_tls_static_surplus >= 1664);

  return 0;

}