components/nacl/loader/nacl_listener.h

   1 // Copyright 2013 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 CHROME_NACL_NACL_LISTENER_H_
   6 #define CHROME_NACL_NACL_LISTENER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "base/threading/thread.h"
  13 #include "components/nacl/common/nacl_types.h"
  14 #include "components/nacl/loader/nacl_trusted_listener.h"
  15 #include "ipc/ipc_listener.h"
  16
  17 namespace base {
  18 class MessageLoopProxy;
  19 }
  20
  21 namespace IPC {
  22 class SyncChannel;
  23 class SyncMessageFilter;
  24 }
  25
  26 // The NaClListener is an IPC channel listener that waits for a
  27 // request to start a NaCl module.
  28 class NaClListener : public IPC::Listener {
  29  public:
  30   NaClListener();
  31   virtual ~NaClListener();
  32   // Listen for a request to launch a NaCl module.
  33   void Listen();
  34
  35   bool Send(IPC::Message* msg);
  36
  37   void set_uses_nonsfi_mode(bool uses_nonsfi_mode) {
  38     uses_nonsfi_mode_ = uses_nonsfi_mode;
  39   }
  40 #if defined(OS_LINUX)
  41   void set_prereserved_sandbox_size(size_t prereserved_sandbox_size) {
  42     prereserved_sandbox_size_ = prereserved_sandbox_size;
  43   }
  44 #endif
  45 #if defined(OS_POSIX)
  46   void set_number_of_cores(int number_of_cores) {
  47     number_of_cores_ = number_of_cores;
  48   }
  49 #endif
  50
  51  private:
  52   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
  53
  54   void OnStart(const nacl::NaClStartParams& params);
  55
  56   // Non-SFI version of OnStart().
  57   void StartNonSfi(const nacl::NaClStartParams& params);
  58
  59   IPC::ChannelHandle CreateTrustedListener(
  60       base::MessageLoopProxy* message_loop_proxy,
  61       base::WaitableEvent* shutdown_event);
  62
  63   // A channel back to the browser.
  64   scoped_ptr<IPC::SyncChannel> channel_;
  65
  66   // A filter that allows other threads to use the channel.
  67   scoped_refptr<IPC::SyncMessageFilter> filter_;
  68
  69   base::WaitableEvent shutdown_event_;
  70   base::Thread io_thread_;
  71
  72   bool uses_nonsfi_mode_;
  73 #if defined(OS_LINUX)
  74   size_t prereserved_sandbox_size_;
  75 #endif
  76 #if defined(OS_POSIX)
  77   // The outer sandbox on Linux and OSX prevents
  78   // sysconf(_SC_NPROCESSORS) from working; in Windows, there are no
  79   // problems with invoking GetSystemInfo.  Therefore, only in
  80   // OS_POSIX do we need to supply the number of cores into the
  81   // NaClChromeMainArgs object.
  82   int number_of_cores_;
  83 #endif
  84
  85   scoped_refptr<NaClTrustedListener> trusted_listener_;
  86
  87   // Used to identify what thread we're on.
  88   base::MessageLoop* main_loop_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(NaClListener);
  91 };
  92
  93 #endif  // CHROME_NACL_NACL_LISTENER_H_