Open socket for NaCl GDB debug stub in browser process.

chrome/browser/nacl_host/nacl_process_host.cc

 // 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.
 
 #include "chrome/browser/nacl_host/nacl_process_host.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 22 matching lines @@
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/pepper_helper.h"
 #include "content/public/common/child_process_host.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_switches.h"
 #include "native_client/src/shared/imc/nacl_imc.h"
 #include "net/base/net_util.h"
+#include "net/base/tcp_listen_socket.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
 #if defined(OS_POSIX)
 #include <fcntl.h>
 
 #include "ipc/ipc_channel_posix.h"
 #elif defined(OS_WIN)
 #include <windows.h>
 
 #include "base/threading/thread.h"
@@ skipping 574 matching lines @@
 
   ChromeViewHostMsg_LaunchNaCl::WriteReplyParams(
       reply_msg_, handles_for_renderer, channel_handle);
   chrome_render_message_filter_->Send(reply_msg_);
   chrome_render_message_filter_ = NULL;
   reply_msg_ = NULL;
   internal_->sockets_for_renderer.clear();
   return true;
 }
 
+// TCP port we chose for NaCl debug stub. It can be any other number.
+static const int kDebugStubPort = 4014;
+
+#if defined(OS_POSIX)
+SocketDescriptor NaClProcessHost::GetDebugStubSocketHandle() {
+  SocketDescriptor s = net::TCPListenSocket::CreateAndBind("127.0.0.1",
+                                                           kDebugStubPort);
+  if (listen(s, 1)) {
+    LOG(ERROR) << "listen() failed on debug stub socket";
+    return net::TCPListenSocket::kInvalidSocket;
+  }
+  return s;
+}
+#endif
+
 bool NaClProcessHost::StartNaClExecution() {
   NaClBrowser* nacl_browser = NaClBrowser::GetInstance();
 
   nacl::NaClStartParams params;
   params.validation_cache_enabled = nacl_browser->ValidationCacheIsEnabled();
   params.validation_cache_key = nacl_browser->GetValidationCacheKey();
   params.version = chrome::VersionInfo().CreateVersionString();
   params.enable_exception_handling = enable_exception_handling_;
   params.enable_debug_stub = enable_debug_stub_;
   params.enable_ipc_proxy = enable_ipc_proxy_;
@@ skipping 30 matching lines @@
   nacl::FileDescriptor memory_fd;
   memory_fd.fd = dup(memory_buffer.handle().fd);
   if (memory_fd.fd < 0) {
     DLOG(ERROR) << "Failed to dup() a file descriptor";
     return false;
   }
   memory_fd.auto_close = true;
   params.handles.push_back(memory_fd);
 #endif
 
+#if defined(OS_POSIX)
+  if (enable_debug_stub_) {
+    SocketDescriptor server_bound_socket = GetDebugStubSocketHandle();
+    if (server_bound_socket != net::TCPListenSocket::kInvalidSocket) {
+      params.debug_stub_server_bound_socket =
+          nacl::FileDescriptor(server_bound_socket, true);
+    }
+  }
+#endif
+
   process_->Send(new NaClProcessMsg_Start(params));
 
   internal_->sockets_for_sel_ldr.clear();
   return true;
 }
 
 bool NaClProcessHost::SendStart() {
   if (!enable_ipc_proxy_) {
     if (!ReplyToRenderer(IPC::ChannelHandle()))
       return false;
@@ skipping 146 matching lines @@
   } else {
     NaClStartDebugExceptionHandlerThread(
         process_handle.Take(), info,
         base::MessageLoopProxy::current(),
         base::Bind(&NaClProcessHost::OnDebugExceptionHandlerLaunchedByBroker,
                    weak_factory_.GetWeakPtr()));
     return true;
   }
 }
 #endif