1 | /* Test size of the static TLS surplus reservation for backwards compatibility. |
2 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <stdio.h> |
20 | #include <support/check.h> |
21 | #include <support/xdlfcn.h> |
22 | |
23 | static int do_test (void); |
24 | #include <support/test-driver.c> |
25 | |
26 | /* This hack results in a definition of struct rtld_global_ro. Do |
27 | this after all the other header inclusions, to minimize the |
28 | impact. */ |
29 | #define SHARED |
30 | #include <ldsodefs.h> |
31 | |
32 | static |
33 | int do_test (void) |
34 | { |
35 | /* Avoid introducing a copy relocation due to the hidden alias in |
36 | ld.so. */ |
37 | struct rtld_global_ro *glro = xdlsym (NULL, symbol: "_rtld_global_ro" ); |
38 | printf (format: "info: _dl_tls_static_surplus: %zu\n" , glro->_dl_tls_static_surplus); |
39 | /* Hisoric value: 16 * 100 + 64. */ |
40 | TEST_VERIFY (glro->_dl_tls_static_surplus >= 1664); |
41 | return 0; |
42 | } |
43 | |