[win] Create ModuleDatabase and ModuleEventSinkImpl.

chrome/browser/conflicts/module_event_sink_impl_win.h

+// 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 CHROME_BROWSER_CONFLICTS_MODULE_EVENT_SINK_IMPL_WIN_H_
+#define CHROME_BROWSER_CONFLICTS_MODULE_EVENT_SINK_IMPL_WIN_H_
+
+#include <stdint.h>
+
+#include "base/process/process_handle.h"
+#include "chrome/common/conflicts/module_event_sink_win.mojom.h"
+#include "content/public/common/process_type.h"
+
+class ModuleDatabase;
+
+// Implementation of the mojom::ModuleEventSink interface. This is the endpoint
+// in the browser process. This redirects calls to the singleton ModuleDatabase
+// object.
+class ModuleEventSinkImpl : public mojom::ModuleEventSink {
+ public:
+  // Creates a service endpoint that forwards notifications from the remote
+  // |process| of the provided |process_type| to the provided |module_database|.
+  // The |module_database| must outlive this object.
+  ModuleEventSinkImpl(base::ProcessHandle process,
+                      content::ProcessType process_type,
+                      ModuleDatabase* module_database);
+  ~ModuleEventSinkImpl() override;
+
+  // Factory function for use with service_manager::InterfaceRegistry. This
+  // creates a concrete implementation of mojom::ModuleDatabase interface in the
+  // current process, for the remote process represented by the provided
+  // |request|. This should only be called on the UI thread.
+  static void Create(base::ProcessHandle process,
+                     content::ProcessType process_type,
+                     ModuleDatabase* module_database,
+                     mojom::ModuleEventSinkRequest request);
+
+  // mojom::ModuleEventSink implementation:
+  void OnModuleEvent(mojom::ModuleEventType event_type,
+                     uint64_t load_address) override;
+
+  bool in_error() const { return in_error_; }
+
+ private:
+  friend class ModuleEventSinkImplTest;
+
+  // OnModuleEvent disptaches to these two functions depending on the event
+  // type.
+  void OnModuleLoad(uint64_t load_address);
+  void OnModuleUnload(uint64_t load_address);
+
+  // A handle to the process on the other side of the pipe.
+  base::ProcessHandle process_;
+
+  // The module database this forwards events to. The |module_database| must
+  // outlive this object.
+  ModuleDatabase* module_database_;
+
+  // The process ID of the remote process on the other end of the pipe. This is
+  // forwarded along to the ModuleDatabase for each call.
+  uint32_t process_id_;
+
+  // The creation time of the process. Combined with process_id_ this uniquely
+  // identifies a process.
+  uint64_t creation_time_;
+
+  // Indicates whether or not this connection is in an error mode. If true then
+  // all communication from the remote client is silently dropped.
+  bool in_error_;
+
+  DISALLOW_COPY_AND_ASSIGN(ModuleEventSinkImpl);
+};
+
+#endif  // CHROME_BROWSER_CONFLICTS_MODULE_EVENT_SINK_IMPL_WIN_H_