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/* Copyright (C) 2004-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Mosberger <davidm@hpl.hp.com>, 2004.
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/>. */
#include <link.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#define SET 0
#define ADD 1
#define REMOVE 2
#define leq(l,r) (((r) - (l)) <= ~0ULL / 2)
static int
callback (struct dl_phdr_info *info, size_t size, void *ptr)
{
static int last_adds = 0, last_subs = 0;
intptr_t cmd = (intptr_t) ptr;
printf (" size = %Zu\n", size);
if (size < (offsetof (struct dl_phdr_info, dlpi_subs)
+ sizeof (info->dlpi_subs)))
{
fprintf (stderr, "dl_iterate_phdr failed to pass dlpi_adds/dlpi_subs\n");
exit (5);
}
printf (" dlpi_adds = %Lu dlpi_subs = %Lu\n",
info->dlpi_adds, info->dlpi_subs);
switch (cmd)
{
case SET:
break;
case ADD:
if (leq (info->dlpi_adds, last_adds))
{
fprintf (stderr, "dlpi_adds failed to get incremented!\n");
exit (3);
}
break;
case REMOVE:
if (leq (info->dlpi_subs, last_subs))
{
fprintf (stderr, "dlpi_subs failed to get incremented!\n");
exit (4);
}
break;
}
last_adds = info->dlpi_adds;
last_subs = info->dlpi_subs;
return -1;
}
static void *
load (const char *path)
{
void *handle;
printf ("loading `%s'\n", path);
handle = dlopen (path, RTLD_LAZY);
if (!handle)
exit (1);
dl_iterate_phdr (callback, (void *)(intptr_t) ADD);
return handle;
}
static void
unload (const char *path, void *handle)
{
printf ("unloading `%s'\n", path);
if (dlclose (handle) < 0)
exit (2);
dl_iterate_phdr (callback, (void *)(intptr_t) REMOVE);
}
int
main (int argc, char **argv)
{
void *handle1, *handle2;
dl_iterate_phdr (callback, (void *)(intptr_t) SET);
handle1 = load ("firstobj.so");
handle2 = load ("globalmod1.so");
unload ("firstobj.so", handle1);
unload ("globalmod1.so", handle2);
return 0;
}
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