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Subject[PATCH v3 3/4] selftests: futex: Add FUTEX_WAIT_MULTIPLE wouldblock test
Date
From: Gabriel Krisman Bertazi <krisman@collabora.com>

Add test for wouldblock return when waiting for multiple futexes. Skip
the test if it's a x32 application and the kernel returned the approtiaded
error, since this ABI is not supported for this operation.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Co-developed-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: André Almeida <andrealmeid@collabora.com>
---
Changes since v2: none
---
.../futex/functional/futex_wait_wouldblock.c | 28 +++++++++++++++++--
1 file changed, 26 insertions(+), 2 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..bcbac042992d 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 <gowrishankar.m@in.ibm.com>
+ * 2019-Dec-13: Add WAIT_MULTIPLE test by Krisman <krisman@collabora.com>
*
*****************************************************************************/

@@ -40,6 +41,7 @@ int main(int argc, char *argv[])
{
struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
futex_t f1 = FUTEX_INITIALIZER;
+ struct futex_wait_block fwb = {&f1, f1+1, 0};
int res, ret = RET_PASS;
int c;

@@ -61,7 +63,7 @@ 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]));

@@ -71,8 +73,30 @@ int main(int argc, char *argv[])
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");
+
+ info("Calling futex_wait_multiple on f1: %u @ %p with val=%u\n",
+ f1, &f1, f1+1);
+ res = futex_wait_multiple(&fwb, 1, NULL, FUTEX_PRIVATE_FLAG);
+
+#ifdef __ILP32__
+ if (res != -1 || errno != ENOSYS) {
+ ksft_test_result_fail("futex_wait_multiple returned %d\n",
+ res < 0 ? errno : res);
+ ret = RET_FAIL;
+ } else {
+ ksft_test_result_skip("futex_wait_multiple not supported at x32\n");
+ }
+#else
+ if (!res || errno != EWOULDBLOCK) {
+ ksft_test_result_fail("futex_wait_multiple returned %d\n",
+ res < 0 ? errno : res);
+ ret = RET_FAIL;
}
+ ksft_test_result_pass("futex_wait_multiple wouldblock succeeds\n");
+#endif /* __ILP32__ */

- print_result(TEST_NAME, ret);
+ ksft_print_cnts();
return ret;
}
--
2.25.0
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