// Copyright 2018 The gVisor Authors. // // 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(), ¶m), SyscallSucceeds()); EXPECT_EQ(param.sched_priority, 0); EXPECT_THAT(sched_getparam(/*pid=*/0, ¶m), SyscallSucceeds()); EXPECT_EQ(param.sched_priority, 0); } TEST(SchedGetparamTest, InvalidPIDReturnsEINVAL) { struct sched_param param; EXPECT_THAT(sched_getparam(/*pid=*/-1, ¶m), SyscallFailsWithErrno(EINVAL)); } TEST(SchedGetparamTest, ImpossiblePIDReturnsESRCH) { struct sched_param param; EXPECT_THAT(sched_getparam(kImpossiblePID, ¶m), 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