From cb71f1fa0183c8f8c8e339452e3ecd1e1717d621 Mon Sep 17 00:00:00 2001
From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Tue, 6 Aug 2019 21:17:22 +0000
Subject: [PATCH] Add a test for kill() on a zombie

---
 tests/sys/kern/Makefile      |  1 +
 tests/sys/kern/kill_zombie.c | 65 ++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 tests/sys/kern/kill_zombie.c

diff --git a/tests/sys/kern/Makefile b/tests/sys/kern/Makefile
index 180734f4d242..62a84d47807e 100644
--- a/tests/sys/kern/Makefile
+++ b/tests/sys/kern/Makefile
@@ -8,6 +8,7 @@ TESTSDIR=	${TESTSBASE}/sys/kern
 #ATF_TESTS_C+=	kcov
 ATF_TESTS_C+=	kern_copyin
 ATF_TESTS_C+=	kern_descrip_test
+ATF_TESTS_C+=	kill_zombie
 ATF_TESTS_C+=	ptrace_test
 TEST_METADATA.ptrace_test+=		timeout="15"
 ATF_TESTS_C+=	reaper
diff --git a/tests/sys/kern/kill_zombie.c b/tests/sys/kern/kill_zombie.c
new file mode 100644
index 000000000000..c7cff7ef69a7
--- /dev/null
+++ b/tests/sys/kern/kill_zombie.c
@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 2018 Jilles Tjoelker
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/wait.h>
+
+#include <atf-c.h>
+#include <signal.h>
+#include <unistd.h>
+
+ATF_TC_WITHOUT_HEAD(kill_zombie);
+ATF_TC_BODY(kill_zombie, tc)
+{
+	pid_t child, pid;
+	int status, r;
+
+	child = fork();
+	ATF_REQUIRE(child != -1);
+	if (child == 0) {
+		_exit(42);
+	}
+
+	r = waitid(P_PID, child, NULL, WEXITED | WNOWAIT);
+	ATF_REQUIRE(r == 0);
+
+	r = kill(child, SIGTERM);
+	ATF_CHECK(r == 0);
+
+	status = -1;
+	pid = waitpid(child, &status, 0);
+	ATF_REQUIRE(pid == child);
+	ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status) == 42);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	ATF_TP_ADD_TC(tp, kill_zombie);
+	return (atf_no_error());
+}