tests: add alarm.test

* tests/alarm.c: New file.
* tests/alarm.test: New test.
* tests/.gitignore: Add alarm.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add alarm.test.
diff --git a/tests/.gitignore b/tests/.gitignore
index ef187d9..b7da7dd 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -8,6 +8,7 @@
 _newselect
 adjtimex
 aio
+alarm
 attach-f-p
 attach-p-cmd-cmd
 attach-p-cmd-p
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9855c0a..81974e3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -58,6 +58,7 @@
 	_newselect \
 	adjtimex \
 	aio \
+	alarm \
 	attach-f-p \
 	attach-p-cmd-cmd \
 	attach-p-cmd-p \
@@ -210,6 +211,7 @@
 	_newselect.test \
 	adjtimex.test \
 	aio.test \
+	alarm.test \
 	bexecve.test \
 	bpf.test \
 	caps.test \
diff --git a/tests/alarm.c b/tests/alarm.c
new file mode 100644
index 0000000..fc10b66
--- /dev/null
+++ b/tests/alarm.c
@@ -0,0 +1,52 @@
+/*
+ * This file is part of alarm strace test.
+ *
+ * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_alarm
+
+# include <stdio.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	int rc = syscall(__NR_alarm, (unsigned long) 0xffffffff0000002a);
+	printf("alarm(%u) = %d\n", 42, rc);
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_alarm")
+
+#endif
diff --git a/tests/alarm.test b/tests/alarm.test
new file mode 100755
index 0000000..6248c5a
--- /dev/null
+++ b/tests/alarm.test
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Check alarm syscall decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -a10 -ealarm $args > "$OUT"
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"