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glibc/elf/tst-dlmodcount.c
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/* Copyright (C) 2004-2016 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); | |
} | |
static int | |
do_test (void) | |
{ | |
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; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |