1 /* Copyright (C) 2013 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 /* Dynamic module with TLS to be accessed by a signal handler to check safety
21 #include <semaphore.h>
25 /* This is an unlikely value to see in incorrectly initialized TLS
26 block -- make sure we're initialized properly. */
27 static __thread
intptr_t tls_data
= 0xdeadbeef;
30 action (int signo
, siginfo_t
*info
, void *ignored
)
32 if (tls_data
!= 0xdeadbeef)
34 write (STDOUT_FILENO
, "wrong TLS value\n", 17);
38 /* arbitrary choice, just write something unique-ish. */
39 tls_data
= (intptr_t) info
;