/*-
* 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 <dlfcn.h>
#include <link_elf.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

int sleep_init;
int sleep_fini;
int dlopen_cookie;
int dlclose_cookie;

void (*tls_callback_sym)(void);

static int
dl_iterate_phdr_cb(struct dl_phdr_info *info, size_t size, void *data)
{
       (*tls_callback_sym)();
       return 0;
}

static void *
test_dl_iterate_phdr_helper(void *dummy)
{
       sleep(10);
       _exit(1);
}

static void
test_dl_iterate_phdr(void)
{
       pthread_t t;
       void *dso;
       sleep_init = 0;
       sleep_fini = 0;
       if ((dso = dlopen("libh_helper_dso2.so", RTLD_LAZY)) == NULL) {
               fprintf(stderr, "opening helper failed\n");
               _exit(1);
       }
       tls_callback_sym = dlsym(dso, "tls_callback");
       if (tls_callback_sym == NULL) {
               fprintf(stderr, "bad helper\n");
               _exit(1);
       }
       pthread_create(&t, NULL, test_dl_iterate_phdr_helper, NULL);
       if (dl_iterate_phdr(dl_iterate_phdr_cb, NULL))
               _exit(1);
       _exit(0);
}

static void *
init_fini_helper(void *arg)
{
       void *dso;
       if ((dso = dlopen(arg, RTLD_LAZY)) == NULL) {
               fprintf(stderr, "opening %s failed\n", (char *)arg);
               exit(1);
       }
       dlclose(dso);
       return NULL;
}

static void
test_dlopen(void)
{
       pthread_t t1, t2;
       sleep_init = 1;
       sleep_fini = 0;
       printf("%d\n", dlopen_cookie);
       pthread_create(&t1, NULL, init_fini_helper,
           __UNCONST("libh_helper_dso2.so"));
       sleep(1);
       printf("%d\n", dlopen_cookie);
       if (dlopen_cookie != 1)
               _exit(1);
       sleep(1);
       pthread_create(&t2, NULL, init_fini_helper,
           __UNCONST("libutil.so"));
       printf("%d\n", dlopen_cookie);
       if (dlopen_cookie != 1)
               _exit(1);
       _exit(0);
}

static void
test_dlclose(void)
{
       pthread_t t1, t2;
       sleep_init = 0;
       sleep_fini = 1;
       printf("%d\n", dlclose_cookie);
       pthread_create(&t1, NULL, init_fini_helper,
           __UNCONST("libh_helper_dso2.so"));
       sleep(1);
       printf("%d\n", dlclose_cookie);
       if (dlclose_cookie != 2)
               _exit(1);
       pthread_create(&t2, NULL, init_fini_helper,
           __UNCONST("libutil.so"));
       sleep(1);
       printf("%d\n", dlclose_cookie);
       if (dlclose_cookie != 2)
               _exit(1);
       _exit(0);
}

int
main(int argc, char **argv)
{
       if (argc != 2)
               return 1;
       if (strcmp(argv[1], "dl_iterate_phdr") == 0)
               test_dl_iterate_phdr();
       if (strcmp(argv[1], "dlopen") == 0)
               test_dlopen();
       if (strcmp(argv[1], "dlclose") == 0)
               test_dlclose();
       return 1;
}