16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322,
17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, 17631,
17692, 17711, 17715, 17776, 17779, 17792, 17836, 17912, 17916, 17930,
- 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991,
- 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, 18032, 18034,
- 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, 18068, 18080,
- 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, 18138, 18185,
- 18196, 18197, 18206, 18210, 18211, 18217, 18220, 18221, 18234, 18244,
- 18247, 18287, 18319, 18324, 18333, 18346, 18397, 18409, 18410, 18412,
- 18418, 18422, 18434, 18444, 18468, 18469, 18470, 18479, 18483, 18495,
- 18496, 18497, 18498, 18507, 18512, 18513, 18519, 18520, 18522, 18527,
- 18528, 18529, 18530, 18532, 18533, 18534, 18536, 18539, 18540, 18542,
- 18544, 18545, 18546, 18547, 18553, 18558, 18569.
+ 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, 17987,
+ 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, 18032,
+ 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, 18068,
+ 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, 18138,
+ 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18220, 18221, 18234,
+ 18244, 18247, 18287, 18319, 18324, 18333, 18346, 18397, 18409, 18410,
+ 18412, 18418, 18422, 18434, 18444, 18468, 18469, 18470, 18479, 18483,
+ 18495, 18496, 18497, 18498, 18507, 18512, 18513, 18519, 18520, 18522,
+ 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, 18539, 18540,
+ 18542, 18544, 18545, 18546, 18547, 18553, 18558, 18569.
* Cache information can be queried via sysconf() function on s390 e.g. with
_SC_LEVEL1_ICACHE_SIZE as argument.
--- /dev/null
+/* 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"