// Copyright 2017 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef BASE_TEST_TEST_SHARED_MEMORY_UTIL_H_ #define BASE_TEST_TEST_SHARED_MEMORY_UTIL_H_ #include "base/memory/platform_shared_memory_region.h" #include "base/memory/read_only_shared_memory_region.h" #include "base/memory/shared_memory_mapping.h" #include "testing/gtest/include/gtest/gtest.h" namespace base { // Check that the shared memory |region| cannot be used to perform a writable // mapping with low-level system APIs like mmap(). Return true in case of // success (i.e. writable mappings are _not_ allowed), or false otherwise. bool CheckReadOnlyPlatformSharedMemoryRegionForTesting( subtle::PlatformSharedMemoryRegion region); // Creates a scoped mapping from a PlatformSharedMemoryRegion. It's useful for // PlatformSharedMemoryRegion testing to not leak mapped memory. // WritableSharedMemoryMapping is used for wrapping because it has max // capabilities but the actual permission depends on the |region|'s mode. // This must not be used in production where PlatformSharedMemoryRegion should // be wrapped with {Writable,Unsafe,ReadOnly}SharedMemoryRegion. WritableSharedMemoryMapping MapAtForTesting( subtle::PlatformSharedMemoryRegion* region, uint64_t offset, size_t size); WritableSharedMemoryMapping MapForTesting( subtle::PlatformSharedMemoryRegion* region); template std::pair CreateMappedRegion(size_t size) { SharedMemoryRegionType region = SharedMemoryRegionType::Create(size); WritableSharedMemoryMapping mapping = region.Map(); return {std::move(region), std::move(mapping)}; } // Template specialization of CreateMappedRegion<>() for // the ReadOnlySharedMemoryRegion. We need this because // ReadOnlySharedMemoryRegion::Create() has a different return type. template <> std::pair CreateMappedRegion(size_t size); } // namespace base #endif // BASE_TEST_TEST_SHARED_MEMORY_UTIL_H_