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/memory/shared_memory.h"
  12 #include "base/synchronization/waitable_event.h"
  13 #include "base/threading/thread.h"
  14 #include "components/nacl/common/nacl_types.h"
  15 #include "components/nacl/loader/nacl_trusted_listener.h"
  16 #include "ipc/ipc_listener.h"
  17
  18 namespace base {
  19 class MessageLoopProxy;
  20 }
  21
  22 namespace IPC {
  23 class SyncChannel;
  24 class SyncMessageFilter;
  25 }
  26
  27 // The NaClListener is an IPC channel listener that waits for a
  28 // request to start a NaCl module.
  29 class NaClListener : public IPC::Listener {
  30  public:
  31   NaClListener();
  32   ~NaClListener() override;
  33   // Listen for a request to launch a NaCl module.
  34   void Listen();
  35
  36   bool Send(IPC::Message* msg);
  37
  38 #if defined(OS_LINUX)
  39   void set_prereserved_sandbox_size(size_t prereserved_sandbox_size) {
  40     prereserved_sandbox_size_ = prereserved_sandbox_size;
  41   }
  42 #endif
  43 #if defined(OS_POSIX)
  44   void set_number_of_cores(int number_of_cores) {
  45     number_of_cores_ = number_of_cores;
  46   }
  47 #endif
  48
  49   void* crash_info_shmem_memory() const { return crash_info_shmem_->memory(); }
  50
  51   typedef base::Callback<void(IPC::PlatformFileForTransit, base::FilePath)>
  52       ResolveFileTokenCallback;
  53   void ResolveFileToken(uint64_t token_lo,
  54                         uint64_t token_hi,
  55                         ResolveFileTokenCallback cb);
  56   void OnFileTokenResolved(uint64_t token_lo,
  57                            uint64_t token_hi,
  58                            IPC::PlatformFileForTransit ipc_fd,
  59                            base::FilePath file_path);
  60
  61  private:
  62   bool OnMessageReceived(const IPC::Message& msg) override;
  63
  64   void OnStart(const nacl::NaClStartParams& params);
  65
  66   // A channel back to the browser.
  67   scoped_ptr<IPC::SyncChannel> channel_;
  68
  69   // A filter that allows other threads to use the channel.
  70   scoped_refptr<IPC::SyncMessageFilter> filter_;
  71
  72   base::WaitableEvent shutdown_event_;
  73   base::Thread io_thread_;
  74
  75 #if defined(OS_LINUX)
  76   size_t prereserved_sandbox_size_;
  77 #endif
  78 #if defined(OS_POSIX)
  79   // The outer sandbox on Linux and OSX prevents
  80   // sysconf(_SC_NPROCESSORS) from working; in Windows, there are no
  81   // problems with invoking GetSystemInfo.  Therefore, only in
  82   // OS_POSIX do we need to supply the number of cores into the
  83   // NaClChromeMainArgs object.
  84   int number_of_cores_;
  85 #endif
  86
  87   scoped_ptr<base::SharedMemory> crash_info_shmem_;
  88
  89   scoped_refptr<NaClTrustedListener> trusted_listener_;
  90
  91   ResolveFileTokenCallback resolved_cb_;
  92
  93   // Used to identify what thread we're on.
  94   base::MessageLoop* main_loop_;
  95
  96   DISALLOW_COPY_AND_ASSIGN(NaClListener);
  97 };
  98
  99 #endif  // CHROME_NACL_NACL_LISTENER_H_