Add a test for poll with null fds.
I don't think we want to *document* this, but since at least
external/curl/lib/select.c is relying on this, we should be careful not
to break it.
Bug: http://b/111850071
Test: ran tests
Change-Id: Ic877250d755a0cb59e77ae38ae5e3949f753dad6
diff --git a/tests/poll_test.cpp b/tests/poll_test.cpp
new file mode 100644
index 0000000..2a3e5e0
--- /dev/null
+++ b/tests/poll_test.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <gtest/gtest.h>
+
+#include <errno.h>
+#include <poll.h>
+
+TEST(poll, poll_null_fds) {
+ // Because nanosleep(2) is relatively new to POSIX, code sometimes abuses poll.
+ errno = 0;
+ ASSERT_EQ(0, poll(nullptr, 0, 1));
+ ASSERT_EQ(0, errno);
+}
+
+TEST(poll, ppoll_null_fds) {
+ // Because nanosleep(2) is relatively new to POSIX, code sometimes abuses poll.
+ errno = 0;
+ timespec ts = { .tv_nsec = 100 };
+ ASSERT_EQ(0, ppoll(nullptr, 0, &ts, nullptr));
+ ASSERT_EQ(0, errno);
+}
+
+TEST(poll, ppoll64_null_fds) {
+#if __BIONIC__
+ // Because nanosleep(2) is relatively new to POSIX, code sometimes abuses poll.
+ errno = 0;
+ timespec ts = { .tv_nsec = 100 };
+ ASSERT_EQ(0, ppoll64(nullptr, 0, &ts, nullptr));
+ ASSERT_EQ(0, errno);
+#endif
+}