/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef mozilla_ipc_SharedMemoryBasic_chromium_h #define mozilla_ipc_SharedMemoryBasic_chromium_h #include "base/shared_memory.h" #include "SharedMemory.h" #ifdef FUZZING # include "SharedMemoryFuzzer.h" #endif #include "nsDebug.h" // // This is a low-level wrapper around platform shared memory. Don't // use it directly; use Shmem allocated through IPDL interfaces. // namespace mozilla { namespace ipc { class SharedMemoryBasic final : public SharedMemoryCommon { public: SharedMemoryBasic() = default; virtual bool SetHandle(const Handle& aHandle, OpenRights aRights) override { return mSharedMemory.SetHandle(aHandle, aRights == RightsReadOnly); } virtual bool Create(size_t aNbytes) override { bool ok = mSharedMemory.Create(aNbytes); if (ok) { Created(aNbytes); } return ok; } virtual bool Map(size_t nBytes, void* fixed_address = nullptr) override { bool ok = mSharedMemory.Map(nBytes, fixed_address); if (ok) { Mapped(nBytes); } return ok; } virtual void CloseHandle() override { mSharedMemory.Close(false); } virtual void* memory() const override { #ifdef FUZZING return SharedMemoryFuzzer::MutateSharedMemory(mSharedMemory.memory(), mAllocSize); #else return mSharedMemory.memory(); #endif } virtual SharedMemoryType Type() const override { return TYPE_BASIC; } static Handle NULLHandle() { return base::SharedMemory::NULLHandle(); } virtual bool IsHandleValid(const Handle& aHandle) const override { return base::SharedMemory::IsHandleValid(aHandle); } virtual bool ShareToProcess(base::ProcessId aProcessId, Handle* new_handle) override { base::SharedMemoryHandle handle; bool ret = mSharedMemory.ShareToProcess(aProcessId, &handle); if (ret) *new_handle = handle; return ret; } static void* FindFreeAddressSpace(size_t size) { return base::SharedMemory::FindFreeAddressSpace(size); } private: ~SharedMemoryBasic() = default; base::SharedMemory mSharedMemory; }; } // namespace ipc } // namespace mozilla #endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h