nptl: Add pthread_attr_setaffinity_np failure test

It checks whether an invalid affinity mask does return an error,
similar to what sysdeps/pthread/tst-bad-schedattr.c does for
pthread_attr_setschedparam.

Checked on x86_64-linux-gnu.

2 files changed, 60 insertions, 0 deletions

diff --git a/nptl/Makefile b/nptl/Makefile
index 16eaf58948..9a5628b751 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -286,6 +286,7 @@ tests = tst-attr2 tst-attr3 tst-default-attr \
 	tst-exec4 tst-exec5 \
 	tst-stack2 tst-stack3 tst-stack4 \
 	tst-pthread-attr-affinity \
+	tst-pthread-attr-affinity-fail \
 	tst-dlsym1 \
 	tst-context1 \
 	tst-sched1 \
diff --git a/nptl/tst-pthread-attr-affinity-fail.c b/nptl/tst-pthread-attr-affinity-fail.c
new file mode 100644
index 0000000000..8334a110cd
--- /dev/null
+++ b/nptl/tst-pthread-attr-affinity-fail.c
@@ -0,0 +1,59 @@
+/* Check if invalid pthread_attr_getaffinity_np does not run any code
+   in the thread function.
+   Copyright (C) 2021 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 <support/check.h>
+#include <support/xunistd.h>
+#include <support/xthread.h>
+#include <stdlib.h>
+
+static void *
+thr_func (void *arg)
+{
+  abort ();
+  return NULL;
+}
+
+static int
+do_test (void)
+{
+  int max_cpu = xsysconf (_SC_NPROCESSORS_CONF) + 1;
+  /* Set a affinity mask with an invalid CPU.  */
+  cpu_set_t *cpuset = CPU_ALLOC (max_cpu);
+  TEST_VERIFY_EXIT (cpuset != NULL);
+  size_t cpusetsize = CPU_ALLOC_SIZE (max_cpu);
+  CPU_ZERO_S (cpusetsize, cpuset);
+  CPU_SET_S (max_cpu, cpusetsize, cpuset);
+
+  /* Check if the affinity mask does trigger an error.  */
+  TEST_COMPARE (sched_setaffinity (0, cpusetsize, cpuset), -1);
+  TEST_COMPARE (errno, EINVAL);
+
+  pthread_attr_t attr;
+  xpthread_attr_init (&attr);
+  xpthread_attr_setaffinity_np (&attr, cpusetsize, cpuset);
+
+  pthread_t thr;
+  TEST_COMPARE (pthread_create (&thr, &attr, thr_func, NULL), EINVAL);
+  xpthread_attr_destroy (&attr);
+
+  return 0;
+}
+
+#include <support/test-driver.c>