1 files changed, 71 insertions, 0 deletions
diff --git a/test/syscalls/linux/sched.cc b/test/syscalls/linux/sched.cc
new file mode 100644
index 000000000..60cb6c443
--- /dev/null
+++ b/test/syscalls/linux/sched.cc
@@ -0,0 +1,71 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <errno.h>
+#include <sched.h>
+
+#include "gtest/gtest.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+// In linux, pid is limited to 29 bits because how futex is implemented.
+constexpr int kImpossiblePID = (1 << 29) + 1;
+
+TEST(SchedGetparamTest, ReturnsZero) {
+  struct sched_param param;
+  EXPECT_THAT(sched_getparam(getpid(), &param), SyscallSucceeds());
+  EXPECT_EQ(param.sched_priority, 0);
+  EXPECT_THAT(sched_getparam(/*pid=*/0, &param), SyscallSucceeds());
+  EXPECT_EQ(param.sched_priority, 0);
+}
+
+TEST(SchedGetparamTest, InvalidPIDReturnsEINVAL) {
+  struct sched_param param;
+  EXPECT_THAT(sched_getparam(/*pid=*/-1, &param),
+              SyscallFailsWithErrno(EINVAL));
+}
+
+TEST(SchedGetparamTest, ImpossiblePIDReturnsESRCH) {
+  struct sched_param param;
+  EXPECT_THAT(sched_getparam(kImpossiblePID, &param),
+              SyscallFailsWithErrno(ESRCH));
+}
+
+TEST(SchedGetparamTest, NullParamReturnsEINVAL) {
+  EXPECT_THAT(sched_getparam(0, nullptr), SyscallFailsWithErrno(EINVAL));
+}
+
+TEST(SchedGetschedulerTest, ReturnsSchedOther) {
+  EXPECT_THAT(sched_getscheduler(getpid()),
+              SyscallSucceedsWithValue(SCHED_OTHER));
+  EXPECT_THAT(sched_getscheduler(/*pid=*/0),
+              SyscallSucceedsWithValue(SCHED_OTHER));
+}
+
+TEST(SchedGetschedulerTest, ReturnsEINVAL) {
+  EXPECT_THAT(sched_getscheduler(/*pid=*/-1), SyscallFailsWithErrno(EINVAL));
+}
+
+TEST(SchedGetschedulerTest, ReturnsESRCH) {
+  EXPECT_THAT(sched_getscheduler(kImpossiblePID), SyscallFailsWithErrno(ESRCH));
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor