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authorryo <ryo@NetBSD.org>2020-04-30 11:03:29 +0000
committerryo <ryo@NetBSD.org>2020-04-30 11:03:29 +0000
commit83ccb03f45eaf897fc6d3a2e5a77a8b56c5aba14 (patch)
treebc57b22fff5f342723e1bd330ca3964f95d23e52 /tests/lib/libc/sys
parent5c2f5fc1504dca7772ba23a0d57f2cd9b03faeb1 (diff)
Add a test for sigaltstack(2) and SA_ONSTACK
Diffstat (limited to 'tests/lib/libc/sys')
-rw-r--r--tests/lib/libc/sys/Makefile3
-rw-r--r--tests/lib/libc/sys/t_sigaltstack.c100
2 files changed, 102 insertions, 1 deletions
diff --git a/tests/lib/libc/sys/Makefile b/tests/lib/libc/sys/Makefile
index 2b686e7e70b..00ebec7ef67 100644
--- a/tests/lib/libc/sys/Makefile
+++ b/tests/lib/libc/sys/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.63 2020/04/26 18:53:33 thorpej Exp $
+# $NetBSD: Makefile,v 1.64 2020/04/30 11:03:29 ryo Exp $
MKMAN= no
@@ -70,6 +70,7 @@ TESTS_C+= t_sendrecv
TESTS_C+= t_setrlimit
TESTS_C+= t_setuid
TESTS_C+= t_sigaction
+TESTS_C+= t_sigaltstack
TESTS_C+= t_sigqueue
TESTS_C+= t_sigtimedwait
TESTS_C+= t_socketpair
diff --git a/tests/lib/libc/sys/t_sigaltstack.c b/tests/lib/libc/sys/t_sigaltstack.c
new file mode 100644
index 00000000000..6710b4a81e2
--- /dev/null
+++ b/tests/lib/libc/sys/t_sigaltstack.c
@@ -0,0 +1,100 @@
+/* $NetBSD: t_sigaltstack.c,v 1.1 2020/04/30 11:03:29 ryo Exp $ */
+
+/*-
+ * Copyright (c) 2020 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>
+__RCSID("$NetBSD: t_sigaltstack.c,v 1.1 2020/04/30 11:03:29 ryo Exp $");
+
+#include <signal.h>
+#include <stdbool.h>
+
+#include <atf-c.h>
+
+#include "h_macros.h"
+
+static stack_t sigstk;
+static bool handler_called;
+static bool handler_use_altstack;
+
+static void
+handler(int signo __unused)
+{
+ char *sp = alloca(128);
+
+ handler_called = true;
+
+ /* checking if the stack pointer is within the range of altstack */
+ if ((char *)sigstk.ss_sp <= sp &&
+ ((char *)sigstk.ss_sp + sigstk.ss_size) > sp)
+ handler_use_altstack = true;
+ else
+ handler_use_altstack = false;
+}
+
+ATF_TC(sigaltstack_onstack);
+ATF_TC_HEAD(sigaltstack_onstack, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Checks for using signal stack with SA_ONSTACK");
+}
+
+ATF_TC_BODY(sigaltstack_onstack, tc)
+{
+ struct sigaction sa;
+ int i;
+
+ /* set a signal handler use alternative stack */
+ memset(&sigstk, 0, sizeof(sigstk));
+ sigstk.ss_sp = malloc(SIGSTKSZ);
+ ATF_REQUIRE(sigstk.ss_sp != NULL);
+ sigstk.ss_size = SIGSTKSZ;
+ sigstk.ss_flags = 0;
+ ATF_REQUIRE(sigaltstack(&sigstk, 0) == 0);
+
+ sigemptyset(&sa.sa_mask);
+ sa.sa_handler = handler;
+ sa.sa_flags = SA_ONSTACK;
+ sigaction(SIGUSR1, &sa, NULL);
+
+ /* test several times */
+ for (i = 1; i <= 5; i++) {
+ handler_called = false;
+ kill(getpid(), SIGUSR1);
+
+ if (!handler_called)
+ atf_tc_fail("signal handler wasn't called (count=%d)", i);
+ if (!handler_use_altstack)
+ atf_tc_fail("alternative stack wasn't used (count=%d)", i);
+ }
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+ ATF_TP_ADD_TC(tp, sigaltstack_onstack);
+
+ return atf_no_error();
+}