Prototype implementation of zygotes

chrome/browser/renderer_host/browser_render_process_host.cc

 // Copyright (c) 2006-2009 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "chrome/browser/renderer_host/browser_render_process_host.h"
 
 #include "build/build_config.h"
 
 #include <algorithm>
 
 #include "app/app_switches.h"
 #if defined(OS_WIN)
 #include "app/win_util.h"
 #endif
 #include "base/command_line.h"
 #include "base/field_trial.h"
 #include "base/linked_ptr.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/rand_util.h"
+#include "base/reserved_file_descriptors.h"
 #include "base/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/child_process_security_policy.h"
 #include "chrome/browser/extensions/extension_message_service.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/history/history.h"
@@ skipping 302 matching lines @@
     // there's not a good place to de-duplicate it.
     base::file_handle_mapping_vector fds_to_map;
     int src_fd = -1, dest_fd = -1;
     channel_->GetClientFileDescriptorMapping(&src_fd, &dest_fd);
     if (src_fd > -1)
       fds_to_map.push_back(std::pair<int, int>(src_fd, dest_fd));
 #if defined(OS_LINUX)
     const int crash_signal_fd =
         Singleton<RenderCrashHandlerHostLinux>()->GetDeathSignalSocket();
     if (crash_signal_fd >= 0)
-      fds_to_map.push_back(std::make_pair(crash_signal_fd, 4));
+      fds_to_map.push_back(std::make_pair(crash_signal_fd, kMagicCrashSignalFd));
+    base::ForkApp(cmd_line.argv(), fds_to_map, &process);
+#else
+    base::LaunchApp(cmd_line.argv(), fds_to_map, false, &process);
 #endif
-    base::LaunchApp(cmd_line.argv(), fds_to_map, false, &process);
 #endif
     if (!process) {
       channel_.reset();
       return false;
     }
     process_.set_handle(process);
     SetProcessID(process_.pid());
   }
 
   resource_message_filter->Init(pid());
@@ skipping 454 matching lines @@
   ExtensionMessageService* ems = ExtensionMessageService::GetInstance(context);
   ems->AddEventListener(event_name, pid());
 }
 
 void BrowserRenderProcessHost::OnExtensionRemoveListener(
     const std::string& event_name) {
   URLRequestContext* context = profile()->GetRequestContext();
   ExtensionMessageService* ems = ExtensionMessageService::GetInstance(context);
   ems->RemoveEventListener(event_name, pid());
 }