43 lines · cpp
1//===-- Unittests for mmap and munmap -------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/sys/mman/mmap.h"10#include "src/sys/mman/munmap.h"11#include "test/UnitTest/ErrnoCheckingTest.h"12#include "test/UnitTest/ErrnoSetterMatcher.h"13#include "test/UnitTest/Test.h"14 15#include <sys/mman.h>16 17using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;18using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;19using LlvmLibcMMapTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;20 21TEST_F(LlvmLibcMMapTest, NoError) {22 size_t alloc_size = 128;23 void *addr = LIBC_NAMESPACE::mmap(nullptr, alloc_size, PROT_READ,24 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);25 ASSERT_ERRNO_SUCCESS();26 EXPECT_NE(addr, MAP_FAILED);27 28 int *array = reinterpret_cast<int *>(addr);29 // Reading from the memory should not crash the test.30 // Since we used the MAP_ANONYMOUS flag, the contents of the newly31 // allocated memory should be initialized to zero.32 EXPECT_EQ(array[0], 0);33 EXPECT_THAT(LIBC_NAMESPACE::munmap(addr, alloc_size), Succeeds());34}35 36TEST_F(LlvmLibcMMapTest, Error_InvalidSize) {37 void *addr = LIBC_NAMESPACE::mmap(nullptr, 0, PROT_READ,38 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);39 EXPECT_THAT(addr, Fails(EINVAL, MAP_FAILED));40 41 EXPECT_THAT(LIBC_NAMESPACE::munmap(0, 0), Fails(EINVAL));42}43