mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 15:00:06 +00:00
79e0d340a9
This reverts commit 731a713b72.
This change is unnecessary because the Makefile already sets up the
environment for the test.
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/* BZ #17977 _res_hconf_reorder_addrs test.
|
|
|
|
Copyright (C) 2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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 <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <dlfcn.h>
|
|
#include <pthread.h>
|
|
#include <netdb.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h>
|
|
|
|
static struct timespec ts;
|
|
|
|
/* The first thread that gets a lock in _res_hconf_reorder_addrs()
|
|
should hold the lock long enough to make two other threads blocked.
|
|
This is achieved by slowing down realloc(3) that is called several times
|
|
by _res_hconf_reorder_addrs(). */
|
|
|
|
void *
|
|
realloc (void *ptr, size_t len)
|
|
{
|
|
static void *(*fun) (void *, size_t);
|
|
|
|
if (!fun)
|
|
fun = dlsym (RTLD_NEXT, "realloc");
|
|
|
|
if (ts.tv_nsec)
|
|
nanosleep (&ts, NULL);
|
|
|
|
return (*fun) (ptr, len);
|
|
}
|
|
|
|
static void *
|
|
resolve (void *arg)
|
|
{
|
|
struct in_addr addr;
|
|
struct hostent ent;
|
|
struct hostent *result;
|
|
int err;
|
|
char buf[1024];
|
|
|
|
addr.s_addr = htonl (INADDR_LOOPBACK);
|
|
(void) gethostbyaddr_r ((void *) &addr, sizeof (addr), AF_INET,
|
|
&ent, buf, sizeof (buf), &result, &err);
|
|
return arg;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
#define N 3
|
|
pthread_t thr[N];
|
|
unsigned int i;
|
|
int result = 0;
|
|
|
|
/* turn on realloc slowdown */
|
|
ts.tv_nsec = 100000000;
|
|
|
|
for (i = 0; i < N; ++i)
|
|
{
|
|
int rc = pthread_create (&thr[i], NULL, resolve, NULL);
|
|
|
|
if (rc)
|
|
{
|
|
printf ("pthread_create: %s\n", strerror(rc));
|
|
exit (1);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < N; ++i)
|
|
{
|
|
void *retval;
|
|
int rc = pthread_join (thr[i], &retval);
|
|
|
|
if (rc)
|
|
{
|
|
printf ("pthread_join: %s\n", strerror(rc));
|
|
exit (1);
|
|
}
|
|
if (retval)
|
|
{
|
|
printf ("thread %u exit status %p\n", i, retval);
|
|
result = 1;
|
|
}
|
|
}
|
|
|
|
/* turn off realloc slowdown, no longer needed */
|
|
ts.tv_nsec = 0;
|
|
|
|
return result;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|