1 | //===-- Unittests for posix_madvise ---------------------------------------===// |
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-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "src/sys/mman/mmap.h" |
10 | #include "src/sys/mman/munmap.h" |
11 | #include "src/sys/mman/posix_madvise.h" |
12 | #include "test/UnitTest/ErrnoCheckingTest.h" |
13 | #include "test/UnitTest/ErrnoSetterMatcher.h" |
14 | #include "test/UnitTest/Test.h" |
15 | |
16 | #include <sys/mman.h> |
17 | |
18 | using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails; |
19 | using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds; |
20 | using LlvmLibcPosixMadviseTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest; |
21 | |
22 | TEST_F(LlvmLibcPosixMadviseTest, NoError) { |
23 | size_t alloc_size = 128; |
24 | void *addr = LIBC_NAMESPACE::mmap(nullptr, alloc_size, PROT_READ, |
25 | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); |
26 | ASSERT_ERRNO_SUCCESS(); |
27 | EXPECT_NE(addr, MAP_FAILED); |
28 | |
29 | EXPECT_EQ(LIBC_NAMESPACE::posix_madvise(addr, alloc_size, POSIX_MADV_RANDOM), |
30 | 0); |
31 | |
32 | int *array = reinterpret_cast<int *>(addr); |
33 | // Reading from the memory should not crash the test. |
34 | // Since we used the MAP_ANONYMOUS flag, the contents of the newly |
35 | // allocated memory should be initialized to zero. |
36 | EXPECT_EQ(array[0], 0); |
37 | EXPECT_THAT(LIBC_NAMESPACE::munmap(addr, alloc_size), Succeeds()); |
38 | } |
39 | |
40 | TEST_F(LlvmLibcPosixMadviseTest, Error_BadPtr) { |
41 | // posix_madvise is a no-op on DONTNEED, so it shouldn't fail even with the |
42 | // nullptr. |
43 | EXPECT_EQ(LIBC_NAMESPACE::posix_madvise(nullptr, 8, POSIX_MADV_DONTNEED), 0); |
44 | |
45 | // posix_madvise doesn't set errno, but the return value is actually the error |
46 | // code. |
47 | EXPECT_EQ(LIBC_NAMESPACE::posix_madvise(nullptr, 8, POSIX_MADV_SEQUENTIAL), |
48 | ENOMEM); |
49 | } |
50 | |