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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 <time.h>
#include "gtest/gtest.h"
#include "test/util/proc_util.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
#if defined(__x86_64__) || defined(__i386__)
time_t vsyscall_time(time_t* t) {
constexpr uint64_t kVsyscallTimeEntry = 0xffffffffff600400;
return reinterpret_cast<time_t (*)(time_t*)>(kVsyscallTimeEntry)(t);
}
TEST(VsyscallTest, VsyscallAlwaysAvailableOnGvisor) {
SKIP_IF(!IsRunningOnGvisor());
// Vsyscall is always advertised by gvisor.
EXPECT_TRUE(ASSERT_NO_ERRNO_AND_VALUE(IsVsyscallEnabled()));
// Vsyscall should always works on gvisor.
time_t t;
EXPECT_THAT(vsyscall_time(&t), SyscallSucceeds());
}
#endif
} // namespace
} // namespace testing
} // namespace gvisor
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