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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 <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
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