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/* Copyright (C) 2013 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
<http://www.gnu.org/licenses/>. */
/* Dynamic module with TLS to be accessed by a signal handler to check safety
of that mode. */
#include <semaphore.h>
#include <signal.h>
#include <unistd.h>
/* This is an unlikely value to see in incorrectly initialized TLS
block -- make sure we're initialized properly. */
static __thread intptr_t tls_data = 0xdeadbeef;
void
action (int signo, siginfo_t *info, void *ignored)
{
sem_t *sem = info->si_value.sival_ptr;
if (tls_data != 0xdeadbeef)
{
write (STDOUT_FILENO, "wrong TLS value\n", 17);
_exit (1);
}
/* arbitrary choice, just write something unique-ish. */
tls_data = (intptr_t) info;
sem_post (sem);
}
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