import of parallel name resolution test.

Obtained from:	NetBSD

1 files changed, 212 insertions, 0 deletions

diff --git a/tools/regression/lib/libc/resolv/resolv.c b/tools/regression/lib/libc/resolv/resolv.c
new file mode 100644
index 0000000..e1f654c
--- /dev/null
+++ b/tools/regression/lib/libc/resolv/resolv.c
@@ -0,0 +1,212 @@
+/*	$NetBSD: resolv.c,v 1.6 2004/05/23 16:59:11 christos Exp $	*/
+
+/*-
+ * Copyright (c) 2004 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 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 <sys/cdefs.h>
+__RCSID("$NetBSD: resolv.c,v 1.6 2004/05/23 16:59:11 christos Exp $");
+
+#include <pthread.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <string.h>
+#include <stringlist.h>
+
+#define NTHREADS	10
+#define NHOSTS		100
+#define WS		" \t\n\r"
+
+static StringList *hosts = NULL;
+static int debug = 0;
+static int *ask = NULL;
+static int *got = NULL;
+
+static void usage(void)  __attribute__((__noreturn__));
+static void load(const char *);
+static void resolvone(int);
+static void *resolvloop(void *);
+static void run(int *);
+
+static pthread_mutex_t stats = PTHREAD_MUTEX_INITIALIZER;
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr,
+	    "Usage: %s [-d] [-h <nhosts>] [-n <nthreads>] <file> ...\n",
+	    getprogname());
+	exit(1);
+}
+
+static void
+load(const char *fname)
+{
+	FILE *fp;
+	size_t len;
+	char *line;
+
+	if ((fp = fopen(fname, "r")) == NULL)
+		err(1, "Cannot open `%s'", fname);
+	while ((line = fgetln(fp, &len)) != NULL) {
+		char c = line[len];
+		char *ptr;
+		line[len] = '\0';
+		for (ptr = strtok(line, WS); ptr; ptr = strtok(NULL, WS))
+			sl_add(hosts, strdup(ptr));
+		line[len] = c;
+	}
+
+	(void)fclose(fp);
+}
+
+static void
+resolvone(int n)
+{
+	char buf[1024];
+	pthread_t self = pthread_self();
+	size_t i = (random() & 0x0fffffff) % hosts->sl_cur;
+	char *host = hosts->sl_str[i];
+	struct addrinfo *res;
+	int error, len;
+	if (debug) {
+		len = snprintf(buf, sizeof(buf), "%p: %d resolving %s %d\n",
+		    self, n, host, (int)i);
+		(void)write(STDOUT_FILENO, buf, len);
+	}
+	error = getaddrinfo(host, NULL, NULL, &res);
+	if (debug) {
+		len = snprintf(buf, sizeof(buf), "%p: host %s %s\n",
+		    self, host, error ? "not found" : "ok");
+		(void)write(STDOUT_FILENO, buf, len);
+	}
+	pthread_mutex_lock(&stats);
+	ask[i]++;
+	got[i] += error == 0;
+	pthread_mutex_unlock(&stats);
+	if (error == 0)
+		freeaddrinfo(res);
+}
+
+static void *
+resolvloop(void *p)
+{
+	int *nhosts = (int *)p;
+	if (*nhosts == 0)
+		return;
+	do
+		resolvone(*nhosts);
+	while (--(*nhosts));
+	return NULL;
+}
+
+static void
+run(int *nhosts)
+{
+	pthread_t self = pthread_self();
+	if (pthread_create(&self, NULL, resolvloop, nhosts) != 0)
+		err(1, "pthread_create");
+}
+
+int
+main(int argc, char *argv[])
+{
+	int nthreads = NTHREADS;
+	int nhosts = NHOSTS;
+	int i, c, done, *nleft;
+	hosts = sl_init();
+
+	srandom(1234);
+
+	while ((c = getopt(argc, argv, "dh:n:")) != -1)
+		switch (c) {
+		case 'd':
+			debug++;
+			break;
+		case 'h':
+			nhosts = atoi(optarg);
+			break;
+		case 'n':
+			nthreads = atoi(optarg);
+			break;
+		default:
+			usage();
+		}
+
+	for (i = optind; i < argc; i++)
+		load(argv[i]);
+
+	if (hosts->sl_cur == 0)
+		usage();
+
+	if ((nleft = malloc(nthreads * sizeof(int))) == NULL)
+		err(1, "malloc");
+	if ((ask = calloc(hosts->sl_cur, sizeof(int))) == NULL)
+		err(1, "calloc");
+	if ((got = calloc(hosts->sl_cur, sizeof(int))) == NULL)
+		err(1, "calloc");
+
+
+	for (i = 0; i < nthreads; i++) {
+		nleft[i] = nhosts;
+		run(&nleft[i]);
+	}
+
+	for (done = 0; !done;) {
+		done = 1;
+		for (i = 0; i < nthreads; i++) {
+			if (nleft[i] != 0) {
+				done = 0;
+				break;
+			}
+		}
+		sleep(1);
+	}
+	c = 0;
+	for (i = 0; i < hosts->sl_cur; i++) {
+		if (ask[i] != got[i] && got[i] != 0) {
+			warnx("Error: host %s ask %d got %d\n",
+			    hosts->sl_str[i], ask[i], got[i]);
+			c++;
+		}
+	}
+	free(nleft);
+	free(ask);
+	free(got);
+	sl_free(hosts, 1);
+	return c;
+}