tests/libexec/ld.elf_so/helper_dso1/h_helper_dso1.c

   1 /*-
   2  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Joerg Sonnenberger.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <poll.h>
  31 #include <stddef.h>
  32 #include <sys/tls.h>
  33
  34 #ifdef __HAVE_NO___THREAD
  35 #define __thread
  36 #endif
  37
  38 extern int sleep_init;
  39 extern int sleep_fini;
  40 extern int dlopen_cookie;
  41
  42 static void __attribute__((__constructor__))
  43 init1(void)
  44 {
  45         dlopen_cookie = 1;
  46         if (!sleep_init)
  47                 return;
  48         for (;;)
  49                 poll(NULL, 0, -1);
  50 }
  51
  52 extern int dlclose_cookie;
  53
  54 static void __attribute__((__destructor__))
  55 fini1(void)
  56 {
  57         dlclose_cookie = 1;
  58         if (!sleep_fini)
  59                 return;
  60         for (;;)
  61                 poll(NULL, 0, -1);
  62 }
  63
  64 static __thread int tls_callback_var;
  65
  66 static void __attribute__((__used__))
  67 tls_callback(void)
  68 {
  69         tls_callback_var = 1;
  70 }