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//===------------------ Unittests for mmap and munmap ---------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/errno/llvmlibc_errno.h"
#include "src/sys/mman/mmap.h"
#include "src/sys/mman/munmap.h"
#include "gtest/gtest.h"
#include "errno.h"
#include "sys/mman.h"
TEST(MMapTest, NoError) {
size_t alloc_size = 128;
llvmlibc_errno = 0;
void *addr = __llvm_libc::mmap(nullptr, alloc_size, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
EXPECT_EQ(0, llvmlibc_errno);
EXPECT_NE(addr, MAP_FAILED);
int *array = reinterpret_cast<int *>(addr);
// Reading from the memory should not crash the test.
// Since we used the MAP_ANONYMOUS flag, the contents of the newly
// allocated memory should be initialized to zero.
EXPECT_EQ(array[0], 0);
int ret_val = __llvm_libc::munmap(addr, alloc_size);
EXPECT_EQ(0, ret_val);
EXPECT_EQ(0, llvmlibc_errno);
}
TEST(MMapTest, Error_InvalidSize) {
llvmlibc_errno = 0;
void *addr = __llvm_libc::mmap(nullptr, 0, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
EXPECT_EQ(EINVAL, llvmlibc_errno);
EXPECT_EQ(addr, MAP_FAILED);
llvmlibc_errno = 0;
int ret_val = __llvm_libc::munmap(0, 0);
EXPECT_EQ(-1, ret_val);
EXPECT_EQ(EINVAL, llvmlibc_errno);
}
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