// 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