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Diffstat (limited to 'test/syscalls/linux/vdso_clock_gettime.cc')
-rw-r--r--test/syscalls/linux/vdso_clock_gettime.cc108
1 files changed, 0 insertions, 108 deletions
diff --git a/test/syscalls/linux/vdso_clock_gettime.cc b/test/syscalls/linux/vdso_clock_gettime.cc
deleted file mode 100644
index ce1899f45..000000000
--- a/test/syscalls/linux/vdso_clock_gettime.cc
+++ /dev/null
@@ -1,108 +0,0 @@
-// 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 <stdint.h>
-#include <sys/time.h>
-#include <syscall.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <map>
-#include <string>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/numbers.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-std::string PrintClockId(::testing::TestParamInfo<clockid_t> info) {
- switch (info.param) {
- case CLOCK_MONOTONIC:
- return "CLOCK_MONOTONIC";
- case CLOCK_REALTIME:
- return "CLOCK_REALTIME";
- case CLOCK_BOOTTIME:
- return "CLOCK_BOOTTIME";
- default:
- return absl::StrCat(info.param);
- }
-}
-
-class CorrectVDSOClockTest : public ::testing::TestWithParam<clockid_t> {};
-
-TEST_P(CorrectVDSOClockTest, IsCorrect) {
- struct timespec tvdso, tsys;
- absl::Time vdso_time, sys_time;
- uint64_t total_calls = 0;
-
- // It is expected that 82.5% of clock_gettime calls will be less than 100us
- // skewed from the system time.
- // Unfortunately this is not only influenced by the VDSO clock skew, but also
- // by arbitrary scheduling delays and the like. The test is therefore
- // regularly disabled.
- std::map<absl::Duration, std::tuple<double, uint64_t, uint64_t>> confidence =
- {
- {absl::Microseconds(100), std::make_tuple(0.825, 0, 0)},
- {absl::Microseconds(250), std::make_tuple(0.94, 0, 0)},
- {absl::Milliseconds(1), std::make_tuple(0.999, 0, 0)},
- };
-
- absl::Time start = absl::Now();
- while (absl::Now() < start + absl::Seconds(30)) {
- EXPECT_THAT(clock_gettime(GetParam(), &tvdso), SyscallSucceeds());
- EXPECT_THAT(syscall(__NR_clock_gettime, GetParam(), &tsys),
- SyscallSucceeds());
-
- vdso_time = absl::TimeFromTimespec(tvdso);
-
- for (auto const& conf : confidence) {
- std::get<1>(confidence[conf.first]) +=
- (sys_time - vdso_time) < conf.first;
- }
-
- sys_time = absl::TimeFromTimespec(tsys);
-
- for (auto const& conf : confidence) {
- std::get<2>(confidence[conf.first]) +=
- (vdso_time - sys_time) < conf.first;
- }
-
- ++total_calls;
- }
-
- for (auto const& conf : confidence) {
- EXPECT_GE(std::get<1>(conf.second) / static_cast<double>(total_calls),
- std::get<0>(conf.second));
- EXPECT_GE(std::get<2>(conf.second) / static_cast<double>(total_calls),
- std::get<0>(conf.second));
- }
-}
-
-INSTANTIATE_TEST_SUITE_P(ClockGettime, CorrectVDSOClockTest,
- ::testing::Values(CLOCK_MONOTONIC, CLOCK_REALTIME,
- CLOCK_BOOTTIME),
- PrintClockId);
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor