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/*
* Copyright (C) 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <unistd.h>
#include <android-base/mapped_file.h>
#include <android-base/unique_fd.h>
#include <cutils/ashmem.h>
/*
* Tests in AshmemBaseTest are designed to run on Android as well as host
* platforms (Linux, Mac, Windows).
*/
#if defined(_WIN32)
static inline size_t getpagesize() {
return 4096;
}
#endif
using android::base::unique_fd;
TEST(AshmemBaseTest, BasicTest) {
const size_t size = getpagesize();
std::vector<uint8_t> data(size);
std::generate(data.begin(), data.end(), [n = 0]() mutable { return n++ & 0xFF; });
unique_fd fd = unique_fd(ashmem_create_region(nullptr, size));
ASSERT_TRUE(fd >= 0);
ASSERT_TRUE(ashmem_valid(fd));
ASSERT_EQ(size, static_cast<size_t>(ashmem_get_size_region(fd)));
std::unique_ptr<android::base::MappedFile> mapped =
android::base::MappedFile::FromFd(fd, 0, size, PROT_READ | PROT_WRITE);
EXPECT_TRUE(mapped.get() != nullptr);
void* region1 = mapped->data();
EXPECT_TRUE(region1 != nullptr);
memcpy(region1, data.data(), size);
ASSERT_EQ(0, memcmp(region1, data.data(), size));
std::unique_ptr<android::base::MappedFile> mapped2 =
android::base::MappedFile::FromFd(fd, 0, size, PROT_READ | PROT_WRITE);
EXPECT_TRUE(mapped2.get() != nullptr);
void* region2 = mapped2->data();
EXPECT_TRUE(region2 != nullptr);
ASSERT_EQ(0, memcmp(region2, data.data(), size));
}
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