[RFC v2 4/4] selftests: futex: Add futex2 wouldblock test

[André Almeida]

Adapt existing futex wait wouldblock file to test the same mechanism for
futex2.

Signed-off-by: André Almeida <andrealm...@collabora.com>
---
 .../futex/functional/futex_wait_wouldblock.c  | 33 ++++++++++++++++---
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c 
b/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c
index 0ae390ff8164..8187f0754cd2 100644
--- a/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c
+++ b/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c
@@ -12,6 +12,7 @@
  *
  * HISTORY
  *      2009-Nov-14: Initial version by Gowrishankar 
<gowrishanka...@in.ibm.com>
+ *      2020-Jul-9: Add futex2 test by André <andrealm...@collabora.com>
  *
  *****************************************************************************/
 
@@ -21,7 +22,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#include "futextest.h"
+#include "futex2test.h"
 #include "logging.h"
 
 #define TEST_NAME "futex-wait-wouldblock"
@@ -39,6 +40,7 @@ void usage(char *prog)
 int main(int argc, char *argv[])
 {
        struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
+       struct timespec64 to64;
        futex_t f1 = FUTEX_INITIALIZER;
        int res, ret = RET_PASS;
        int c;
@@ -61,18 +63,41 @@ int main(int argc, char *argv[])
        }
 
        ksft_print_header();
-       ksft_set_plan(1);
+       ksft_set_plan(2);
        ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
               basename(argv[0]));
 
        info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
        res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
        if (!res || errno != EWOULDBLOCK) {
-               fail("futex_wait returned: %d %s\n",
+               ksft_test_result_fail("futex_wait returned: %d %s\n",
                     res ? errno : res, res ? strerror(errno) : "");
                ret = RET_FAIL;
+       } else {
+               ksft_test_result_pass("futex_wait wouldblock succeeds\n");
        }
 
-       print_result(TEST_NAME, ret);
+       /* setting absolute timeout for futex2 */
+       if (gettime64(CLOCK_MONOTONIC, &to64))
+               error("gettime64 failed\n", errno);
+
+       to64.tv_nsec += timeout_ns;
+
+       if (to64.tv_nsec >= 1000000000) {
+               to64.tv_sec++;
+               to64.tv_nsec -= 1000000000;
+       }
+
+       info("Calling futex2_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
+       res = futex2_wait(&f1, f1+1, FUTEX_PRIVATE_FLAG | FUTEX_32, &to64);
+       if (!res || errno != EWOULDBLOCK) {
+               ksft_test_result_fail("futex2_wait returned: %d %s\n",
+                    res ? errno : res, res ? strerror(errno) : "");
+               ret = RET_FAIL;
+       } else {
+               ksft_test_result_pass("futex2_wait wouldblock succeeds\n");
+       }
+
+       ksft_print_cnts();
        return ret;
 }
-- 
2.27.0