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//===-- Unittests for madvise ---------------------------------------------===//
//
// 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/sys/mman/madvise.h"
#include "src/sys/mman/mmap.h"
#include "src/sys/mman/munmap.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
using LlvmLibcMadviseTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
TEST_F(LlvmLibcMadviseTest, NoError) {
size_t alloc_size = 128;
void *addr = LIBC_NAMESPACE::mmap(nullptr, alloc_size, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
ASSERT_ERRNO_SUCCESS();
EXPECT_NE(addr, MAP_FAILED);
EXPECT_THAT(LIBC_NAMESPACE::madvise(addr, alloc_size, MADV_RANDOM),
Succeeds());
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);
EXPECT_THAT(LIBC_NAMESPACE::munmap(addr, alloc_size), Succeeds());
}
TEST_F(LlvmLibcMadviseTest, Error_BadPtr) {
EXPECT_THAT(LIBC_NAMESPACE::madvise(nullptr, 8, MADV_SEQUENTIAL),
Fails(ENOMEM));
}
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