1 /* Copyright (C) 2004-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by David Mosberger <davidm@hpl.hp.com>, 2004.
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.
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.
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 <http://www.gnu.org/licenses/>. */
28 #define leq(l,r) (((r) - (l)) <= ~0ULL / 2)
31 callback (struct dl_phdr_info *info, size_t size, void *ptr)
33 static int last_adds = 0, last_subs = 0;
34 intptr_t cmd = (intptr_t) ptr;
36 printf (" size = %Zu\n", size);
37 if (size < (offsetof (struct dl_phdr_info, dlpi_subs)
38 + sizeof (info->dlpi_subs)))
40 fprintf (stderr, "dl_iterate_phdr failed to pass dlpi_adds/dlpi_subs\n");
44 printf (" dlpi_adds = %Lu dlpi_subs = %Lu\n",
45 info->dlpi_adds, info->dlpi_subs);
53 if (leq (info->dlpi_adds, last_adds))
55 fprintf (stderr, "dlpi_adds failed to get incremented!\n");
61 if (leq (info->dlpi_subs, last_subs))
63 fprintf (stderr, "dlpi_subs failed to get incremented!\n");
68 last_adds = info->dlpi_adds;
69 last_subs = info->dlpi_subs;
74 load (const char *path)
78 printf ("loading `%s'\n", path);
79 handle = dlopen (path, RTLD_LAZY);
82 dl_iterate_phdr (callback, (void *)(intptr_t) ADD);
87 unload (const char *path, void *handle)
89 printf ("unloading `%s'\n", path);
90 if (dlclose (handle) < 0)
92 dl_iterate_phdr (callback, (void *)(intptr_t) REMOVE);
96 main (int argc, char **argv)
98 void *handle1, *handle2;
100 dl_iterate_phdr (callback, (void *)(intptr_t) SET);
101 handle1 = load ("firstobj.so");
102 handle2 = load ("globalmod1.so");
103 unload ("firstobj.so", handle1);
104 unload ("globalmod1.so", handle2);