[CRIU] [PATCH cr 2/2] zdtm: cow00 checks unshared pages

[Andrey Vagin]

A parent and a child write in one page and check data after suspend/resume

Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
 test/zdtm/live/static/cow00.c |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/test/zdtm/live/static/cow00.c b/test/zdtm/live/static/cow00.c
index 04b6c53..2c72283 100644
--- a/test/zdtm/live/static/cow00.c
+++ b/test/zdtm/live/static/cow00.c
@@ -13,8 +13,9 @@
 const char *test_doc	= "Check that cow memory are restored";
 const char *test_author	= "Andrey Vagin <avagin at parallels.com";
 
-#define MAP_SIZE	(PAGE_SIZE * 2)
+#define MAP_SIZE	(PAGE_SIZE * 3)
 #define NONCOW_OFFSET	PAGE_SIZE
+#define UNSHARE_OFFSET  (PAGE_SIZE * 2)
 
 static int is_cow(void *addr, pid_t p1, pid_t p2)
 {
@@ -82,11 +83,15 @@ int main(int argc, char ** argv)
 
 	memset(addr, 1, PAGE_SIZE);
 
+	addr[UNSHARE_OFFSET] = 'P';
+
 	pid = test_fork();
 	if (pid < 0) {
 		err("Unable to fork a new process\n");
 		return 1;
 	} else if (pid == 0) {
+		addr[UNSHARE_OFFSET] = 'C';
+
 		test_waitsig();
 
 		if (addr[NONCOW_OFFSET]) {
@@ -95,6 +100,12 @@ int main(int argc, char ** argv)
 			return 1;
 		}
 
+		if (addr[UNSHARE_OFFSET] != 'C') {
+			fail("%p contains '%c' instead of 'C'",
+				addr + UNSHARE_OFFSET, addr[UNSHARE_OFFSET]);
+			return 1;
+		}
+
 		return 0;
 	}
 
@@ -117,6 +128,12 @@ int main(int argc, char ** argv)
 		goto out;
 	}
 
+	if (addr[UNSHARE_OFFSET] != 'P') {
+		fail("%p contains '%c' instead of 'P'",
+			addr + UNSHARE_OFFSET, addr[UNSHARE_OFFSET]);
+		goto out;
+	}
+
 	ret = 0;
 out:
 	kill(pid, SIGTERM);
-- 
1.7.1