Sync to HEAD@r272516.

1 files changed, 148 insertions, 0 deletions

diff --git a/contrib/netbsd-tests/lib/libpthread/t_fpu.c b/contrib/netbsd-tests/lib/libpthread/t_fpu.c
new file mode 100644
index 0000000..4047b1f
--- /dev/null
+++ b/contrib/netbsd-tests/lib/libpthread/t_fpu.c
@@ -0,0 +1,148 @@
+/* $NetBSD: t_fpu.c,v 1.2 2013/01/27 14:47:37 mbalmer Exp $ */
+
+/*
+ * Copyright (c) 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * 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 <sys/cdefs.h>
+__COPYRIGHT("@(#) Copyright (c) 2008\
+ The NetBSD Foundation, inc. All rights reserved.");
+__RCSID("$NetBSD: t_fpu.c,v 1.2 2013/01/27 14:47:37 mbalmer Exp $");
+
+/*
+ * This is adapted from part of csw/cstest of the MPD implementation by
+ * the University of Arizona CS department (http://www.cs.arizona.edu/sr/)
+ * which is in the public domain:
+ *
+ * "The MPD system is in the public domain and you may use and distribute it
+ *  as you wish.  We ask that you retain credits referencing the University
+ *  of Arizona and that you identify any changes you make.
+ *
+ *  We can't provide a warranty with MPD; it's up to you to determine its
+ *  suitability and reliability for your needs.  We would like to hear of
+ *  any problems you encounter but we cannot promise a timely correction."
+ *
+ * It was changed to use pthread_create() and sched_yield() instead of
+ * the internal MPD context switching primitives by Ignatios Souvatzis
+ * <is@netbsd.org>.
+ */
+
+#include <math.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+#include "h_common.h"
+
+#define N_RECURSE 10
+
+static void recurse(void);
+
+int recursion_depth = 0;
+pthread_mutex_t recursion_depth_lock;
+
+static void *
+stir(void *p)
+{
+	double *q = (double *)p;
+	double x = *q++;
+	double y = *q++;
+	double z = *q++;
+
+	for (;;) {
+		x = sin ((y = cos (x + y + .4)) - (z = cos (x + z + .6)));
+		PTHREAD_REQUIRE(sched_yield());
+	}
+}
+
+static double
+mul3(double x, double y, double z)
+{
+	PTHREAD_REQUIRE(sched_yield());
+
+	return x * y * z;
+}
+
+static void *
+bar(void *p)
+{
+	double d;
+	int rc;
+
+	d = mul3(mul3(2., 3., 5.), mul3(7., 11., 13.), mul3(17., 19., 23.));
+	ATF_REQUIRE_EQ(d, 223092870.);
+
+	PTHREAD_REQUIRE(pthread_mutex_lock(&recursion_depth_lock));
+	rc = recursion_depth++;
+	PTHREAD_REQUIRE(pthread_mutex_unlock(&recursion_depth_lock));
+
+	if (rc < N_RECURSE)
+		recurse();
+	else
+		atf_tc_pass();
+
+	/* NOTREACHED */
+	return NULL;
+}
+
+static void
+recurse(void) {
+	pthread_t s2;
+	pthread_create(&s2, 0, bar, 0);
+	sleep(20); /* XXX must be long enough for our slowest machine */
+}
+
+ATF_TC(fpu);
+ATF_TC_HEAD(fpu, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+		"Checks that thread context switches will leave the "
+		"floating point computations unharmed");
+}
+ATF_TC_BODY(fpu, tc)
+{
+	double stirseed[] = { 1.7, 3.2, 2.4 };
+	pthread_t s5;
+
+	printf("Testing threaded floating point computations...\n");
+
+	PTHREAD_REQUIRE(pthread_mutex_init(&recursion_depth_lock, 0));
+
+	pthread_create(&s5, 0, stir, stirseed);
+	recurse();
+
+	atf_tc_fail("exiting from main");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, fpu);
+
+	return atf_no_error();
+}