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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.
// This is a very simple sanity test to validate that the sysinfo syscall is
// supported by gvisor and returns sane values.
#include <sys/syscall.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "absl/time/clock.h"
#include "absl/time/time.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
TEST(SysinfoTest, SysinfoIsCallable) {
struct sysinfo ignored = {};
EXPECT_THAT(syscall(SYS_sysinfo, &ignored), SyscallSucceedsWithValue(0));
}
TEST(SysinfoTest, EfaultProducedOnBadAddress) {
// Validate that we return EFAULT when a bad address is provided.
// specified by man 2 sysinfo
EXPECT_THAT(syscall(SYS_sysinfo, nullptr), SyscallFailsWithErrno(EFAULT));
}
TEST(SysinfoTest, TotalRamSaneValue) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
EXPECT_GT(s.totalram, 0);
}
TEST(SysinfoTest, MemunitSet) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
EXPECT_GE(s.mem_unit, 1);
}
TEST(SysinfoTest, UptimeSaneValue) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
EXPECT_GE(s.uptime, 0);
}
TEST(SysinfoTest, UptimeIncreasingValue) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
absl::SleepFor(absl::Seconds(2));
struct sysinfo s2 = {};
EXPECT_THAT(sysinfo(&s2), SyscallSucceedsWithValue(0));
EXPECT_LT(s.uptime, s2.uptime);
}
TEST(SysinfoTest, FreeRamSaneValue) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
EXPECT_GT(s.freeram, 0);
EXPECT_LT(s.freeram, s.totalram);
}
TEST(SysinfoTest, NumProcsSaneValue) {
struct sysinfo s = {};
EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
EXPECT_GT(s.procs, 0);
}
} // namespace
} // namespace testing
} // namespace gvisor
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