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 <map>
   9 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/shared_memory.h"
  13 #include "base/synchronization/waitable_event.h"
  14 #include "base/threading/thread.h"
  15 #include "components/nacl/common/nacl_types.h"
  16 #include "components/nacl/loader/nacl_trusted_listener.h"
  17 #include "ipc/ipc_listener.h"
  18
  19 namespace IPC {
  20 class SyncChannel;
  21 class SyncMessageFilter;
  22 }
  23
  24 // The NaClListener is an IPC channel listener that waits for a
  25 // request to start a NaCl module.
  26 class NaClListener : public IPC::Listener {
  27  public:
  28   NaClListener();
  29   ~NaClListener() override;
  30   // Listen for a request to launch a NaCl module.
  31   void Listen();
  32
  33   bool Send(IPC::Message* msg);
  34
  35 #if defined(OS_LINUX)
  36   void set_prereserved_sandbox_size(size_t prereserved_sandbox_size) {
  37     prereserved_sandbox_size_ = prereserved_sandbox_size;
  38   }
  39 #endif
  40 #if defined(OS_POSIX)
  41   void set_number_of_cores(int number_of_cores) {
  42     number_of_cores_ = number_of_cores;
  43   }
  44 #endif
  45
  46   void* crash_info_shmem_memory() const { return crash_info_shmem_->memory(); }
  47
  48   NaClTrustedListener* trusted_listener() const {
  49     return trusted_listener_.get();
  50   }
  51
  52   typedef base::Callback<void(IPC::PlatformFileForTransit, base::FilePath)>
  53       ResolveFileTokenCallback;
  54   void ResolveFileToken(uint64_t token_lo,
  55                         uint64_t token_hi,
  56                         ResolveFileTokenCallback cb);
  57   void OnFileTokenResolved(uint64_t token_lo,
  58                            uint64_t token_hi,
  59                            IPC::PlatformFileForTransit ipc_fd,
  60                            base::FilePath file_path);
  61
  62  private:
  63   bool OnMessageReceived(const IPC::Message& msg) override;
  64
  65   typedef base::Callback<void(const IPC::Message&,
  66                               IPC::PlatformFileForTransit,
  67                               base::FilePath)> OpenResourceReplyCallback;
  68
  69   bool OnOpenResource(const IPC::Message& msg,
  70                       const std::string& key,
  71                       OpenResourceReplyCallback cb);
  72
  73   void OnAddPrefetchedResource(
  74       const nacl::NaClResourcePrefetchResult& prefetched_resource_file);
  75   void OnStart(const nacl::NaClStartParams& params);
  76
  77   // A channel back to the browser.
  78   scoped_ptr<IPC::SyncChannel> channel_;
  79
  80   // A filter that allows other threads to use the channel.
  81   scoped_refptr<IPC::SyncMessageFilter> filter_;
  82
  83   base::WaitableEvent shutdown_event_;
  84   base::Thread io_thread_;
  85
  86 #if defined(OS_LINUX)
  87   size_t prereserved_sandbox_size_;
  88 #endif
  89 #if defined(OS_POSIX)
  90   // The outer sandbox on Linux and OSX prevents
  91   // sysconf(_SC_NPROCESSORS) from working; in Windows, there are no
  92   // problems with invoking GetSystemInfo.  Therefore, only in
  93   // OS_POSIX do we need to supply the number of cores into the
  94   // NaClChromeMainArgs object.
  95   int number_of_cores_;
  96 #endif
  97
  98   scoped_ptr<base::SharedMemory> crash_info_shmem_;
  99
 100   scoped_refptr<NaClTrustedListener> trusted_listener_;
 101
 102   ResolveFileTokenCallback resolved_cb_;
 103
 104   // Used to identify what thread we're on.
 105   base::MessageLoop* main_loop_;
 106
 107   typedef std::map<
 108     std::string,  // manifest key
 109     std::pair<IPC::PlatformFileForTransit,
 110               base::FilePath> > PrefetchedResourceFilesMap;
 111   PrefetchedResourceFilesMap prefetched_resource_files_;
 112
 113   bool is_started_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(NaClListener);
 116 };
 117
 118 #endif  // CHROME_NACL_NACL_LISTENER_H_