1 files changed, 124 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/include/sys/t_tree.c b/contrib/netbsd-tests/include/sys/t_tree.c
new file mode 100644
index 0000000..498f7ee
--- /dev/null
+++ b/contrib/netbsd-tests/include/sys/t_tree.c
@@ -0,0 +1,124 @@
+/* $NetBSD: t_tree.c,v 1.1 2011/05/05 13:36:05 jruoho Exp $ */
+
+/*-
+ * Copyright (c) 2010, 2011 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>
+#include <sys/tree.h>
+
+#include <atf-c.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+struct mist {
+	RB_ENTRY(mist) rbentry;
+	int key;
+};
+RB_HEAD(head, mist) tt;
+
+static int
+mistcmp(struct mist *a, struct mist *b)
+{
+#if 0
+	return (b->key - a->key); /* wrong, can overflow */
+#else
+	if (b->key > a->key)
+		return 1;
+	else if (b->key < a->key)
+		return (-1);
+	else
+		return 0;
+#endif
+}
+
+RB_PROTOTYPE(head, mist, rbentry, mistcmp)
+RB_GENERATE(head, mist, rbentry, mistcmp)
+
+static struct mist *
+addmist(int key)
+{
+	struct mist *m;
+
+	m = malloc(sizeof(struct mist));
+	m->key = key;
+	RB_INSERT(head, &tt, m);
+	return m;
+}
+
+static int
+findmist(struct mist *m)
+{
+
+	return (!!RB_FIND(head, &tt, m));
+}
+
+#define N 1000
+static int
+test(void)
+{
+	struct mist *m[N];
+	int fail, i, j;
+
+	RB_INIT(&tt);
+	fail = 0;
+	for (i = 0; i < N; i++) {
+		m[i] = addmist(random() << 1); /* use all 32 bits */
+		for (j = 0; j <= i; j++)
+			if (!findmist(m[j]))
+				fail++;
+	}
+	return fail;
+}
+
+ATF_TC(tree_rbstress);
+ATF_TC_HEAD(tree_rbstress, tc)
+{
+
+	atf_tc_set_md_var(tc, "descr", "rb-tree stress test");
+}
+
+ATF_TC_BODY(tree_rbstress, tc)
+{
+	int i, fail, f;
+
+	srandom(4711);
+	fail = 0;
+	for (i = 0; i < 10; i++) {
+		f = test();
+		if (f) {
+			atf_tc_fail_nonfatal("loop %d: %d errors\n", i, f);
+			fail += f;
+		}
+	}
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	ATF_TP_ADD_TC(tp, tree_rbstress);
+
+	return atf_no_error();
+}