xref: /src/tests/libexec/ld.elf_so/helper_dso1/h_helper_dso1.c

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Joerg Sonnenberger.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <poll.h>
#include <stddef.h>
#include <sys/tls.h>

#ifdef __HAVE_NO___THREAD
#define	__thread
#endif

extern int sleep_init;
extern int sleep_fini;
extern int dlopen_cookie;

static void __attribute__((__constructor__))
init1(void)
{
	dlopen_cookie = 1;
	if (!sleep_init)
		return;
	for (;;)
		poll(NULL, 0, -1);
}

extern int dlclose_cookie;

static void __attribute__((__destructor__))
fini1(void)
{
	dlclose_cookie = 1;
	if (!sleep_fini)
		return;
	for (;;)
		poll(NULL, 0, -1);
}

static __thread int tls_callback_var;

static void __attribute__((__used__))
tls_callback(void)
{
	tls_callback_var = 1;
}