// 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 <sys/mman.h> #include "gtest/gtest.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { class MunmapTest : public ::testing::Test { protected: void SetUp() override { m_ = mmap(nullptr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); ASSERT_NE(MAP_FAILED, m_); } void* m_ = nullptr; }; TEST_F(MunmapTest, HappyCase) { EXPECT_THAT(munmap(m_, kPageSize), SyscallSucceeds()); } TEST_F(MunmapTest, ZeroLength) { EXPECT_THAT(munmap(m_, 0), SyscallFailsWithErrno(EINVAL)); } TEST_F(MunmapTest, LastPageRoundUp) { // Attempt to unmap up to and including the last page. EXPECT_THAT(munmap(m_, static_cast<size_t>(-kPageSize + 1)), SyscallFailsWithErrno(EINVAL)); } } // namespace } // namespace testing } // namespace gvisor