zdtm: Add vDSO test

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

test/zdtm.sh

@@ -17,6 +17,7 @@ $ZP/static/write_read01
 $ZP/static/write_read02
 $ZP/static/wait00
 $ZP/static/pthread00
+$ZP/static/vdso00
 $ZP/static/file_shared
 $ZP/streaming/pipe_loop00
 $ZP/streaming/pipe_shared00

test/zdtm/live/static/Makefile

@@ -25,6 +25,7 @@ TST_NOFILE	=				\
 		ptrace_sig			\
 		pipe00				\
 		pthread00			\
+		vdso00				\
 #		jobctl00			\
 
 TST_FILE	=				\

test/zdtm/live/static/vdso00.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check if we can use vDSO after restore\n";
+const char *test_author	= "Cyrill Gorcunov <gorcunov@openvz.org";
+
+int main(int argc, char *argv[])
+{
+	struct timeval tv;
+	struct timezone tz;
+
+	test_init(argc, argv);
+	test_msg("%s pid %d\n", argv[0], getpid());
+
+	gettimeofday(&tv, &tz);
+	test_msg("%d time: %10li\n", getpid(), tv.tv_sec);
+
+	test_daemon();
+	test_waitsig();
+
+	/* this call will fail if vDSO is corrupted */
+	gettimeofday(&tv, &tz);
+	test_msg("%d time: %10li\n", getpid(), tv.tv_sec);
+
+	pass();
+
+	return 0;
+}