105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <errno.h>
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#include <time.h>
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#include "gtest/gtest.h"
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#include "test/util/proc_util.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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constexpr long kFudgeSeconds = 5;
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// Mimics the time(2) wrapper from glibc prior to 2.15.
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time_t vsyscall_time(time_t* t) {
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constexpr uint64_t kVsyscallTimeEntry = 0xffffffffff600400;
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return reinterpret_cast<time_t (*)(time_t*)>(kVsyscallTimeEntry)(t);
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}
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TEST(TimeTest, VsyscallTime_Succeeds) {
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SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(IsVsyscallEnabled()));
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time_t t1, t2;
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{
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const DisableSave ds; // Timing assertions.
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EXPECT_THAT(time(&t1), SyscallSucceeds());
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EXPECT_THAT(vsyscall_time(&t2), SyscallSucceeds());
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}
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// Time should be monotonic.
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EXPECT_LE(static_cast<long>(t1), static_cast<long>(t2));
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// Check that it's within kFudge seconds.
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EXPECT_LE(static_cast<long>(t2), static_cast<long>(t1) + kFudgeSeconds);
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// Redo with save.
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EXPECT_THAT(time(&t1), SyscallSucceeds());
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EXPECT_THAT(vsyscall_time(&t2), SyscallSucceeds());
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// Time should be monotonic.
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EXPECT_LE(static_cast<long>(t1), static_cast<long>(t2));
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}
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TEST(TimeTest, VsyscallTime_InvalidAddressSIGSEGV) {
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EXPECT_EXIT(vsyscall_time(reinterpret_cast<time_t*>(0x1)),
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::testing::KilledBySignal(SIGSEGV), "");
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}
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int vsyscall_gettimeofday(struct timeval* tv, struct timezone* tz) {
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constexpr uint64_t kVsyscallGettimeofdayEntry = 0xffffffffff600000;
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return reinterpret_cast<int (*)(struct timeval*, struct timezone*)>(
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kVsyscallGettimeofdayEntry)(tv, tz);
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}
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TEST(TimeTest, VsyscallGettimeofday_Succeeds) {
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SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(IsVsyscallEnabled()));
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struct timeval tv1, tv2;
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struct timezone tz1, tz2;
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{
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const DisableSave ds; // Timing assertions.
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EXPECT_THAT(gettimeofday(&tv1, &tz1), SyscallSucceeds());
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EXPECT_THAT(vsyscall_gettimeofday(&tv2, &tz2), SyscallSucceeds());
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}
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// See above.
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EXPECT_LE(static_cast<long>(tv1.tv_sec), static_cast<long>(tv2.tv_sec));
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EXPECT_LE(static_cast<long>(tv2.tv_sec),
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static_cast<long>(tv1.tv_sec) + kFudgeSeconds);
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// Redo with save.
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EXPECT_THAT(gettimeofday(&tv1, &tz1), SyscallSucceeds());
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EXPECT_THAT(vsyscall_gettimeofday(&tv2, &tz2), SyscallSucceeds());
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}
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TEST(TimeTest, VsyscallGettimeofday_InvalidAddressSIGSEGV) {
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SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(IsVsyscallEnabled()));
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EXPECT_EXIT(vsyscall_gettimeofday(reinterpret_cast<struct timeval*>(0x1),
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reinterpret_cast<struct timezone*>(0x1)),
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::testing::KilledBySignal(SIGSEGV), "");
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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