linux-kernel - [PATCH v5 06/11] selftests: futex2: Add timeout test

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Date:   Thu,  8 Jul 2021 21:13:23 -0300
From:   André Almeida <andrealmeid@...labora.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     kernel@...labora.com, krisman@...labora.com,
        pgriffais@...vesoftware.com, z.figura12@...il.com,
        joel@...lfernandes.org, malteskarupke@...tmail.fm,
        linux-api@...r.kernel.org, fweimer@...hat.com,
        libc-alpha@...rceware.org, linux-kselftest@...r.kernel.org,
        shuah@...nel.org, acme@...nel.org, corbet@....net,
        Peter Oskolkov <posk@...k.io>,
        Andrey Semashev <andrey.semashev@...il.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Nicholas Piggin <npiggin@...il.com>,
        Adhemerval Zanella <adhemerval.zanella@...aro.org>,
        André Almeida <andrealmeid@...labora.com>
Subject: [PATCH v5 06/11] selftests: futex2: Add timeout test

Adapt existing futex wait timeout file to test the same mechanism for
futex2. futex2 accepts only absolute 64bit timers, but supports both
monotonic and realtime clocks.

Signed-off-by: André Almeida <andrealmeid@...labora.com>
---
 .../futex/functional/futex_wait_timeout.c     | 24 +++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/futex/functional/futex_wait_timeout.c b/tools/testing/selftests/futex/functional/futex_wait_timeout.c
index 1f8f6daaf1e7..d20f54745c2e 100644
--- a/tools/testing/selftests/futex/functional/futex_wait_timeout.c
+++ b/tools/testing/selftests/futex/functional/futex_wait_timeout.c
@@ -17,6 +17,14 @@
 
 #include <pthread.h>
 #include "futextest.h"
+
+#include <errno.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "futex2test.h"
 #include "logging.h"
 
 #define TEST_NAME "futex-wait-timeout"
@@ -92,8 +100,8 @@ static int futex_get_abs_timeout(clockid_t clockid, struct timespec *to,
 int main(int argc, char *argv[])
 {
 	futex_t f1 = FUTEX_INITIALIZER;
+	struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
 	int res, ret = RET_PASS;
-	struct timespec to;
 	pthread_t thread;
 	int c;
 
@@ -118,7 +126,7 @@ int main(int argc, char *argv[])
 	}
 
 	ksft_print_header();
-	ksft_set_plan(7);
+	ksft_set_plan(9);
 	ksft_print_msg("%s: Block on a futex and wait for timeout\n",
 	       basename(argv[0]));
 	ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns);
@@ -175,6 +183,18 @@ int main(int argc, char *argv[])
 	res = futex_lock_pi(&futex_pi, NULL, 0, FUTEX_CLOCK_REALTIME);
 	test_timeout(res, &ret, "futex_lock_pi invalid timeout flag", ENOSYS);
 
+	/* setting absolute monotonic timeout for futex2 */
+	if (futex_get_abs_timeout(CLOCK_MONOTONIC, &to, timeout_ns))
+		return RET_FAIL;
+	res = futex2_wait(&f1, f1, FUTEX_32, &to);
+	test_timeout(res, &ret, "futex2_wait monotonic", ETIMEDOUT);
+
+	/* setting absolute realtime timeout for futex2 */
+	if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns))
+		return RET_FAIL;
+	res = futex2_wait(&f1, f1, FUTEX_32 | FUTEX_CLOCK_REALTIME, &to);
+	test_timeout(res, &ret, "futex2_wait realtime", ETIMEDOUT);
+
 	ksft_print_cnts();
 	return ret;
 }
-- 
2.32.0