git: f5463265955b - main - kqueue tests: Add a regression test

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=f5463265955b829775bbb32e1fd0bc11dafc36ce

commit f5463265955b829775bbb32e1fd0bc11dafc36ce
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-11-24 15:28:13 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2024-01-27 18:51:13 +0000

    kqueue tests: Add a regression test
    
    Based on the test case submitted by Andreas Bock for PR 275286.
    
    PR:             275286
    MFC after:      2 weeks
---
 tests/sys/kqueue/Makefile      |  4 +-
 tests/sys/kqueue/kqueue_fork.c | 89 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+), 2 deletions(-)

diff --git a/tests/sys/kqueue/Makefile b/tests/sys/kqueue/Makefile
index 3267b9ad8d9a..37f4f323904d 100644
--- a/tests/sys/kqueue/Makefile
+++ b/tests/sys/kqueue/Makefile
@@ -1,10 +1,10 @@
-
 TESTSRC=	${SRCTOP}/contrib/netbsd-tests/kernel/kqueue
 
 TESTSDIR=	${TESTSBASE}/sys/kqueue
 BINDIR=		${TESTSDIR}
 
-ATF_TESTS_C+=	kqueue_peek_signal
+ATF_TESTS_C+=	kqueue_fork		\
+		kqueue_peek_signal
 
 NETBSD_ATF_TESTS_C=	proc1_test
 # XXX: fails `ke.fflags & NOTE_TRACKERR` invariant
diff --git a/tests/sys/kqueue/kqueue_fork.c b/tests/sys/kqueue/kqueue_fork.c
new file mode 100644
index 000000000000..e4c0412c1980
--- /dev/null
+++ b/tests/sys/kqueue/kqueue_fork.c
@@ -0,0 +1,89 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 Andreas Bock <andreas.bock@virtual-arts-software.de>
+ * Copyright (c) 2023 Mark Johnston <markj@FreeBSD.org>
+ *
+ * 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/event.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+/*
+ * A regression test for bugzilla 275286.
+ */
+ATF_TC_WITHOUT_HEAD(shared_table_filt_sig);
+ATF_TC_BODY(shared_table_filt_sig, tc)
+{
+	struct sigaction sa;
+	pid_t pid;
+	int error, status;
+
+	sa.sa_handler = SIG_IGN;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+	error = sigaction(SIGINT, &sa, NULL);
+	ATF_REQUIRE(error == 0);
+
+	pid = rfork(RFPROC);
+	ATF_REQUIRE(pid != -1);
+	if (pid == 0) {
+		struct kevent ev;
+		int kq;
+
+		kq = kqueue();
+		if (kq < 0)
+			err(1, "kqueue");
+		EV_SET(&ev, SIGINT, EVFILT_SIGNAL, EV_ADD | EV_ENABLE, 0, 0,
+		    NULL);
+		if (kevent(kq, &ev, 1, NULL, 0, NULL) < 0)
+			err(2, "kevent");
+		if (kevent(kq, NULL, 0, &ev, 1, NULL) < 0)
+			err(3, "kevent");
+		_exit(0);
+	}
+
+	/* Wait for the child to block in kevent(). */
+	usleep(100000);
+
+	error = kill(pid, SIGINT);
+	ATF_REQUIRE(error == 0);
+
+	error = waitpid(pid, &status, 0);
+	ATF_REQUIRE(error != -1);
+	ATF_REQUIRE(WIFEXITED(status));
+	ATF_REQUIRE_EQ(WEXITSTATUS(status), 0);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, shared_table_filt_sig);
+
+	return (atf_no_error());
+}