Non-SFI Mode: Build ipc/ library by PNaCl toolchain for nacl_helper_nonsfi.

ipc/ipc_channel_posix.h

 // Copyright (c) 2012 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 IPC_IPC_CHANNEL_POSIX_H_
 #define IPC_IPC_CHANNEL_POSIX_H_
 
 #include "ipc/ipc_channel.h"
 
 #include <sys/socket.h>  // for CMSG macros
@@ skipping 67 matching lines @@
   // for more connections.
   void ResetToAcceptingConnectionState();
 
   // Returns true if the peer process' effective user id can be determined, in
   // which case the supplied peer_euid is updated with it.
   bool GetPeerEuid(uid_t* peer_euid) const;
 
   void CloseClientFileDescriptor();
 
   static bool IsNamedServerInitialized(const std::string& channel_id);
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(__native_client_nonsfi__)

[Mark Seaborn, 2014/10/23 03:33:48]

If I understand correctly, these changes to the PID handling won't be needed
until nacl_helper_nonsfi is seccomp-sandboxed.  The non-sandboxed version won't
need these changes.

So would you mind taking out the PID-related changes for now?  It should be
possible to make IPC work without exposing the PID inside the sandbox.

[hidehiko, 2014/10/23 14:19:10]

Ok, reverted. But we need to solve the pid issue.
Please let me start the discussion separately.

   static void SetGlobalPid(int pid);
-#endif  // OS_LINUX
+#endif
 
  private:
   bool CreatePipe(const IPC::ChannelHandle& channel_handle);
 
   bool ProcessOutgoingMessages();
 
   bool AcceptConnection();
   void ClosePipeOnError();
   int GetHelloMessageProcId() const;
   void QueueHelloMessage();
@@ skipping 106 matching lines @@
 #if defined(OS_MACOSX)
   // On OSX, sent FDs must not be closed until we get an ack.
   // Keep track of sent FDs here to make sure the remote is not
   // trying to bamboozle us.
   std::set<int> fds_to_close_;
 #endif
 
   // True if we are responsible for unlinking the unix domain socket file.
   bool must_unlink_;
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(__native_client_nonsfi__)
   // If non-zero, overrides the process ID sent in the hello message.
   static int global_pid_;
-#endif  // OS_LINUX
+#endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelPosix);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_POSIX_H_