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//===-- 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/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/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
const size_t PAGE_SIZE = LIBC_NAMESPACE::sysconf(_SC_PAGESIZE);
using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;
using LlvmLibcMsyncTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
struct PageHolder {
size_t size;
void *addr;
PageHolder()
: size(PAGE_SIZE),
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_F(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_F(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_F(LlvmLibcMsyncTest, UnalignedAddress) {
PageHolder page;
ASSERT_TRUE(page.is_valid());
EXPECT_THAT(LIBC_NAMESPACE::msync(&page[1], page.size - 1, MS_SYNC),
Fails(EINVAL));
}
TEST_F(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));
}
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