| //===-- Unittests for msync -----------------------------------------------===// |
| // |
| // 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/libc_errno.h" |
| #include "src/sys/mman/mlock.h" |
| #include "src/sys/mman/mmap.h" |
| #include "src/sys/mman/msync.h" |
| #include "src/sys/mman/munlock.h" |
| #include "src/sys/mman/munmap.h" |
| #include "src/unistd/sysconf.h" |
| #include "test/UnitTest/ErrnoSetterMatcher.h" |
| #include "test/UnitTest/LibcTest.h" |
| #include "test/UnitTest/Test.h" |
| |
| using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher; |
| |
| struct PageHolder { |
| size_t size; |
| void *addr; |
| |
| PageHolder() |
| : size(LIBC_NAMESPACE::sysconf(_SC_PAGESIZE)), |
| addr(LIBC_NAMESPACE::mmap(nullptr, size, PROT_READ | PROT_WRITE, |
| MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)) {} |
| ~PageHolder() { |
| if (addr != MAP_FAILED) |
| LIBC_NAMESPACE::munmap(addr, size); |
| } |
| |
| char &operator[](size_t i) { return reinterpret_cast<char *>(addr)[i]; } |
| |
| bool is_valid() { return addr != MAP_FAILED; } |
| }; |
| |
| TEST(LlvmLibcMsyncTest, UnMappedMemory) { |
| EXPECT_THAT(LIBC_NAMESPACE::msync(nullptr, 1024, MS_SYNC), Fails(ENOMEM)); |
| EXPECT_THAT(LIBC_NAMESPACE::msync(nullptr, 1024, MS_ASYNC), Fails(ENOMEM)); |
| } |
| |
| TEST(LlvmLibcMsyncTest, LockedPage) { |
| PageHolder page; |
| ASSERT_TRUE(page.is_valid()); |
| ASSERT_THAT(LIBC_NAMESPACE::mlock(page.addr, page.size), Succeeds()); |
| EXPECT_THAT( |
| LIBC_NAMESPACE::msync(page.addr, page.size, MS_SYNC | MS_INVALIDATE), |
| Fails(EBUSY)); |
| ASSERT_THAT(LIBC_NAMESPACE::munlock(page.addr, page.size), Succeeds()); |
| EXPECT_THAT(LIBC_NAMESPACE::msync(page.addr, page.size, MS_SYNC), Succeeds()); |
| } |
| |
| TEST(LlvmLibcMsyncTest, UnalignedAddress) { |
| PageHolder page; |
| ASSERT_TRUE(page.is_valid()); |
| EXPECT_THAT(LIBC_NAMESPACE::msync(&page[1], page.size - 1, MS_SYNC), |
| Fails(EINVAL)); |
| } |
| |
| TEST(LlvmLibcMsyncTest, InvalidFlag) { |
| PageHolder page; |
| ASSERT_TRUE(page.is_valid()); |
| EXPECT_THAT(LIBC_NAMESPACE::msync(page.addr, page.size, MS_SYNC | MS_ASYNC), |
| Fails(EINVAL)); |
| EXPECT_THAT(LIBC_NAMESPACE::msync(page.addr, page.size, -1), Fails(EINVAL)); |
| } |