[PATCH 2/2] misc: tst-futex: Create futex test

Create test for the futex syscall wrappers.

Signed-off-by: André Almeida <[email protected]>
---
 sysdeps/unix/sysv/linux/Makefile    |  1 +
 sysdeps/unix/sysv/linux/tst-futex.c | 93 +++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 sysdeps/unix/sysv/linux/tst-futex.c

diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index d3ccb57b59..73ea9425f4 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -201,6 +201,7 @@ tests += \
   tst-epoll-ioctls \
   tst-fanotify \
   tst-fdopendir-o_path \
+  tst-futex \
   tst-getauxval \
   tst-gettid \
   tst-gettid-kill \
diff --git a/sysdeps/unix/sysv/linux/tst-futex.c b/sysdeps/unix/sysv/linux/tst-futex.c
new file mode 100644
index 0000000000..fae6418a1c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-futex.c
@@ -0,0 +1,93 @@
+/* Basic tests for Linux futex_* wrappers.
+   Copyright (C) 2022-2026 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <intprops.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/timespec.h>
+#include <support/xunistd.h>
+#include <support/xthread.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/futex.h>
+#include <sys/syscall.h>
+
+#define FUTEX_WAKE                1
+
+#define NR_WAITERS 5
+
+static uint32_t futex[NR_WAITERS];
+
+static int
+futex_wake (uint32_t *futex, int val)
+{
+  return syscall (__NR_futex, futex, FUTEX_WAKE, val);
+}
+
+static void *
+thread_waiter (void *arg)
+{
+  struct futex_waitv waiters[NR_WAITERS];
+  struct timespec timeout;
+  int i, ret;
+
+  clock_gettime(CLOCK_MONOTONIC, &timeout);
+  timeout.tv_sec += 5;
+
+  for (i = 0; i < NR_WAITERS; i++) {
+    waiters[i].uaddr = (uintptr_t) &futex[i];
+    waiters[i].val = 0;
+    waiters[i].flags = FUTEX2_SIZE_U32;
+    waiters[i].__reserved = 0;
+  }
+
+  ret = futex_waitv(waiters, NR_WAITERS, 0, &timeout, CLOCK_MONOTONIC);
+ 
+  if (ret == -1)
+    FAIL_EXIT1 ("futex_waitv failed");
+
+  return NULL;
+}
+
+static void
+test_futex_waitv_basic (void)
+{
+  int i;
+
+  for (i = 0; i < NR_WAITERS; i++)
+    futex[i] = 0;
+  
+  xpthread_create (NULL, thread_waiter, NULL);
+
+  usleep(1000);
+
+  futex_wake (&futex[3], 0);
+
+}
+
+static int
+do_test (void)
+{
+  test_futex_waitv_basic ();
+
+
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
2.55.0