Move Windows Sandbox, trybots version (don't commit me!)

sandbox/src/sharedmem_ipc_server.h

-// Copyright (c) 2012 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 SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_
-#define SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_
-
-#include <list>
-
-#include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
-#include "sandbox/src/crosscall_params.h"
-#include "sandbox/src/crosscall_server.h"
-#include "sandbox/src/sharedmem_ipc_client.h"
-
-// IPC transport implementation that uses shared memory.
-// This is the server side
-//
-// The server side has knowledge about the layout of the shared memory
-// and the state transitions. Both are explained in sharedmem_ipc_client.h
-//
-// As opposed to SharedMemIPClient, the Server object should be one for the
-// entire lifetime of the target process. The server is in charge of creating
-// the events (ping, pong) both for the client and for the target that are used
-// to signal the IPC and also in charge of setting the initial state of the
-// channels.
-//
-// When an IPC is ready, the server relies on being called by on the
-// ThreadPingEventReady callback. The IPC server then retrieves the buffer,
-// marshals it into a CrossCallParam object and calls the Dispatcher, who is in
-// charge of fulfilling the IPC request.
-namespace sandbox {
-
-// the shared memory implementation of the IPC server. There should be one
-// of these objects per target (IPC client) process
-class SharedMemIPCServer {
- public:
-  // Creates the IPC server.
-  // target_process: handle to the target process. It must be suspended.
-  // target_process_id: process id of the target process.
-  // target_job: the job object handle associated with the target process.
-  // thread_provider: a thread provider object.
-  // dispatcher: an object that can service IPC calls.
-  SharedMemIPCServer(HANDLE target_process, DWORD target_process_id,
-                     HANDLE target_job, ThreadProvider* thread_provider,
-                     Dispatcher* dispatcher);
-
-  ~SharedMemIPCServer();
-
-  // Initializes the server structures, shared memory structures and
-  // creates the kernels events used to signal the IPC.
-  bool Init(void* shared_mem, uint32 shared_size, uint32 channel_size);
-
- private:
-  // Allow tests to be marked DISABLED_. Note that FLAKY_ and FAILS_ prefixes
-  // do not work with sandbox tests.
-  FRIEND_TEST_ALL_PREFIXES(IPCTest, SharedMemServerTests);
-  // When an event fires (IPC request). A thread from the ThreadProvider
-  // will call this function. The context parameter should be the same as
-  // provided when ThreadProvider::RegisterWait was called.
-  static void __stdcall ThreadPingEventReady(void* context,
-                                             unsigned char);
-
-  // Makes the client and server events. This function is called once
-  // per channel.
-  bool MakeEvents(HANDLE* server_ping, HANDLE* server_pong,
-                  HANDLE* client_ping, HANDLE* client_pong);
-
-  // A copy this structure is maintained per channel.
-  // Note that a lot of the fields are just the same of what we have in the IPC
-  // object itself. It is better to have the copies since we can dispatch in the
-  // static method without worrying about converting back to a member function
-  // call or about threading issues.
-  struct ServerControl {
-    // This channel server ping event.
-    HANDLE ping_event;
-    // This channel server pong event.
-    HANDLE pong_event;
-    // The size of this channel.
-    uint32 channel_size;
-    // The pointer to the actual channel data.
-    char* channel_buffer;
-    // The pointer to the base of the shared memory.
-    char* shared_base;
-    // A pointer to this channel's client-side control structure this structure
-    // lives in the shared memory.
-    ChannelControl* channel;
-    // the IPC dispatcher associated with this channel.
-    Dispatcher* dispatcher;
-    // The target process information associated with this channel.
-    ClientInfo target_info;
-  };
-
-  // Looks for the appropriate handler for this IPC and invokes it.
-  static bool InvokeCallback(const ServerControl* service_context,
-                             void* ipc_buffer, CrossCallReturn* call_result);
-
-  // Points to the shared memory channel control which lives at
-  // the start of the shared section.
-  IPCControl* client_control_;
-
-  // Keeps track of the server side objects that are used to answer an IPC.
-  typedef std::list<ServerControl*> ServerContexts;
-  ServerContexts server_contexts_;
-
-  // The thread provider provides the threads that call back into this object
-  // when the IPC events fire.
-  ThreadProvider* thread_provider_;
-
-  // The IPC object is associated with a target process.
-  HANDLE target_process_;
-
-  // The target process id associated with the IPC object.
-  DWORD target_process_id_;
-
-  // The target object is inside a job too.
-  HANDLE target_job_object_;
-
-  // The dispatcher handles 'ready' IPC calls.
-  Dispatcher* call_dispatcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(SharedMemIPCServer);
-};
-
-}  // namespace sandbox
-
-#endif  // SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_