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// 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
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