content/browser/browser_child_process_host_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
   6 #define CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
   7
   8 #include <list>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/process/process.h"
  13 #include "base/synchronization/waitable_event_watcher.h"
  14 #include "content/browser/child_process_launcher.h"
  15 #include "content/browser/power_monitor_message_broadcaster.h"
  16 #include "content/public/browser/browser_child_process_host.h"
  17 #include "content/public/browser/child_process_data.h"
  18 #include "content/public/common/child_process_host_delegate.h"
  19
  20 #if defined(OS_WIN)
  21 #include "base/win/object_watcher.h"
  22 #endif
  23
  24 namespace base {
  25 class CommandLine;
  26 }
  27
  28 namespace content {
  29
  30 class BrowserChildProcessHostIterator;
  31 class BrowserChildProcessObserver;
  32 class BrowserMessageFilter;
  33
  34 // Plugins/workers and other child processes that live on the IO thread use this
  35 // class. RenderProcessHostImpl is the main exception that doesn't use this
  36 /// class because it lives on the UI thread.
  37 class CONTENT_EXPORT BrowserChildProcessHostImpl
  38     : public BrowserChildProcessHost,
  39       public NON_EXPORTED_BASE(ChildProcessHostDelegate),
  40 #if defined(OS_WIN)
  41       public base::win::ObjectWatcher::Delegate,
  42 #endif
  43       public ChildProcessLauncher::Client {
  44  public:
  45   BrowserChildProcessHostImpl(content::ProcessType process_type,
  46                               BrowserChildProcessHostDelegate* delegate);
  47   ~BrowserChildProcessHostImpl() override;
  48
  49   // Terminates all child processes and deletes each BrowserChildProcessHost
  50   // instance.
  51   static void TerminateAll();
  52
  53   // BrowserChildProcessHost implementation:
  54   bool Send(IPC::Message* message) override;
  55   void Launch(SandboxedProcessLauncherDelegate* delegate,
  56               base::CommandLine* cmd_line,
  57               bool terminate_on_shutdown) override;
  58   const ChildProcessData& GetData() const override;
  59   ChildProcessHost* GetHost() const override;
  60   base::TerminationStatus GetTerminationStatus(bool known_dead,
  61                                                int* exit_code) override;
  62   void SetName(const base::string16& name) override;
  63   void SetHandle(base::ProcessHandle handle) override;
  64
  65   // ChildProcessHostDelegate implementation:
  66   bool CanShutdown() override;
  67   void OnChildDisconnected() override;
  68   const base::Process& GetProcess() const override;
  69   bool OnMessageReceived(const IPC::Message& message) override;
  70   void OnChannelConnected(int32 peer_pid) override;
  71   void OnChannelError() override;
  72   void OnBadMessageReceived(const IPC::Message& message) override;
  73
  74   // Removes this host from the host list. Calls ChildProcessHost::ForceShutdown
  75   void ForceShutdown();
  76
  77   // Callers can reduce the BrowserChildProcess' priority.
  78   void SetBackgrounded(bool backgrounded);
  79
  80   // Adds an IPC message filter.
  81   void AddFilter(BrowserMessageFilter* filter);
  82
  83   // Called when an instance of a particular child is created in a page.
  84   static void NotifyProcessInstanceCreated(const ChildProcessData& data);
  85
  86   static void HistogramBadMessageTerminated(int process_type);
  87
  88   BrowserChildProcessHostDelegate* delegate() const { return delegate_; }
  89
  90   typedef std::list<BrowserChildProcessHostImpl*> BrowserChildProcessList;
  91  private:
  92   friend class BrowserChildProcessHostIterator;
  93   friend class BrowserChildProcessObserver;
  94
  95   static BrowserChildProcessList* GetIterator();
  96
  97   static void AddObserver(BrowserChildProcessObserver* observer);
  98   static void RemoveObserver(BrowserChildProcessObserver* observer);
  99
 100   // ChildProcessLauncher::Client implementation.
 101   void OnProcessLaunched() override;
 102   void OnProcessLaunchFailed() override;
 103
 104 #if defined(OS_WIN)
 105   // ObjectWatcher::Delegate implementation.
 106   void OnObjectSignaled(HANDLE object) override;
 107 #endif
 108
 109   ChildProcessData data_;
 110   BrowserChildProcessHostDelegate* delegate_;
 111   scoped_ptr<ChildProcessHost> child_process_host_;
 112
 113   scoped_ptr<ChildProcessLauncher> child_process_;
 114
 115   PowerMonitorMessageBroadcaster power_monitor_message_broadcaster_;
 116
 117 #if defined(OS_WIN)
 118   // Watches to see if the child process exits before the IPC channel has
 119   // been connected. Thereafter, its exit is determined by an error on the
 120   // IPC channel.
 121   base::win::ObjectWatcher early_exit_watcher_;
 122 #endif
 123 };
 124
 125 }  // namespace content
 126
 127 #endif  // CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_