//===-- 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/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(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)); }