Non-SFI Mode: Build base/ library by PNaCL toolchain for nacl_helper_nonsfi.

base/posix/unix_domain_socket_linux.cc

 // Copyright (c) 2011 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.
 
 #include "base/posix/unix_domain_socket_linux.h"
 
 #include <errno.h>
 #include <sys/socket.h>
-#include <sys/uio.h>
 #include <unistd.h>
 
 #include <vector>
 
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/pickle.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/stl_util.h"
 
+#if !defined(__native_client_nonsfi__)
+#include <sys/uio.h>
+#endif
+
 const size_t UnixDomainSocket::kMaxFileDescriptors = 16;
 
+#if !defined(__native_client_nonsfi__)
 // Creates a connected pair of UNIX-domain SOCK_SEQPACKET sockets, and passes
 // ownership of the newly allocated file descriptors to |one| and |two|.
 // Returns true on success.
 static bool CreateSocketPair(base::ScopedFD* one, base::ScopedFD* two) {
   int raw_socks[2];
   if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, raw_socks) == -1)
     return false;
   one->reset(raw_socks[0]);
   two->reset(raw_socks[1]);
   return true;
 }
 
 // static
 bool UnixDomainSocket::EnableReceiveProcessId(int fd) {
   const int enable = 1;
   return setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &enable, sizeof(enable)) == 0;
 }
+#endif  // !defined(__native_client_nonsfi__)
 
 // static
 bool UnixDomainSocket::SendMsg(int fd,
                                const void* buf,
                                size_t length,
                                const std::vector<int>& fds) {
   struct msghdr msg = {};
   struct iovec iov = { const_cast<void*>(buf), length };
   msg.msg_iov = &iov;
   msg.msg_iovlen = 1;
@@ skipping 49 matching lines @@
                                            int flags,
                                            ScopedVector<base::ScopedFD>* fds,
                                            base::ProcessId* out_pid) {
   fds->clear();
 
   struct msghdr msg = {};
   struct iovec iov = { buf, length };
   msg.msg_iov = &iov;
   msg.msg_iovlen = 1;
 
-  char control_buffer[CMSG_SPACE(sizeof(int) * kMaxFileDescriptors) +
-                      CMSG_SPACE(sizeof(struct ucred))];
+  const size_t kControlBufferSize =
+      CMSG_SPACE(sizeof(int) * kMaxFileDescriptors)
+#if !defined(__native_client_nonsfi__)
+      // The PNaCl toolchain for Non-SFI binary build does not support ucred.
+      + CMSG_SPACE(sizeof(struct ucred))
+#endif
+      ;
+  char control_buffer[kControlBufferSize];
   msg.msg_control = control_buffer;
   msg.msg_controllen = sizeof(control_buffer);
 
   const ssize_t r = HANDLE_EINTR(recvmsg(fd, &msg, flags));
   if (r == -1)
     return -1;
 
   int* wire_fds = NULL;
   unsigned wire_fds_len = 0;
   base::ProcessId pid = -1;
 
   if (msg.msg_controllen > 0) {
     struct cmsghdr* cmsg;
     for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
       const unsigned payload_len = cmsg->cmsg_len - CMSG_LEN(0);
       if (cmsg->cmsg_level == SOL_SOCKET &&
           cmsg->cmsg_type == SCM_RIGHTS) {
         DCHECK(payload_len % sizeof(int) == 0);
         DCHECK(wire_fds == NULL);
         wire_fds = reinterpret_cast<int*>(CMSG_DATA(cmsg));
         wire_fds_len = payload_len / sizeof(int);
       }
+#if !defined(__native_client_nonsfi__)
+      // The PNaCl toolchain for Non-SFI binary build does not support
+      // SCM_CREDENTIALS.
       if (cmsg->cmsg_level == SOL_SOCKET &&
           cmsg->cmsg_type == SCM_CREDENTIALS) {
         DCHECK(payload_len == sizeof(struct ucred));
         DCHECK(pid == -1);
         pid = reinterpret_cast<struct ucred*>(CMSG_DATA(cmsg))->pid;
       }
+#endif
     }
   }
 
+#if !defined(__native_client_nonsfi__)
+  // The PNaCl toolchain for Non-SFI binary build does not support
+  // MSG_TRUNC nor MSG_CTRUNC.

[Mark Seaborn, 2014/10/16 23:03:09]

Grammar nit: "nor" -> "or"

(It's either "doesn't support X or Y" or "supports neither X nor Y".)

[hidehiko, 2014/10/17 04:44:57]

Done. Thank you!

   if (msg.msg_flags & MSG_TRUNC || msg.msg_flags & MSG_CTRUNC) {
     for (unsigned i = 0; i < wire_fds_len; ++i)
       close(wire_fds[i]);
     errno = EMSGSIZE;
     return -1;
   }
+#endif
 
   if (wire_fds) {
     for (unsigned i = 0; i < wire_fds_len; ++i)
       fds->push_back(new base::ScopedFD(wire_fds[i]));
   }
 
   if (out_pid) {
     // |pid| will legitimately be -1 if we read EOF, so only DCHECK if we
     // actually received a message.  Unfortunately, Linux allows sending zero
     // length messages, which are indistinguishable from EOF, so this check
     // has false negatives.
     if (r > 0 || msg.msg_controllen > 0)
       DCHECK_GE(pid, 0);
 
     *out_pid = pid;
   }
 
   return r;
 }
 
+#if !defined(__native_client_nonsfi__)
 // static
 ssize_t UnixDomainSocket::SendRecvMsg(int fd,
                                       uint8_t* reply,
                                       unsigned max_reply_len,
                                       int* result_fd,
                                       const Pickle& request) {
   return UnixDomainSocket::SendRecvMsgWithFlags(fd, reply, max_reply_len,
                                                 0,  /* recvmsg_flags */
                                                 result_fd, request);
 }
@@ skipping 37 matching lines @@
   if (recv_fds.size() > (result_fd != NULL ? 1 : 0)) {
     NOTREACHED();
     return -1;
   }
 
   if (result_fd)
     *result_fd = recv_fds.empty() ? -1 : recv_fds[0]->release();
 
   return reply_len;
 }
+#endif  // !defined(__native_client_nonsfi__)