child_thread.cc revision bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/child_thread.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/allocator/allocator_extension.h" 87dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#include "base/base_switches.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 10eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/lazy_instance.h" 119ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/message_loop/message_loop.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/process.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/process_util.h" 14868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/strings/string_util.h" 15eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/threading/thread_local.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/tracked_objects.h" 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "components/tracing/child_trace_message_filter.h" 18868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/child_histogram_message_filter.h" 19868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/child_process.h" 20868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/child_resource_message_filter.h" 21868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/fileapi/file_system_dispatcher.h" 22868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/quota_dispatcher.h" 23868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/resource_dispatcher.h" 24868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/socket_stream_dispatcher.h" 25868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "content/child/thread_safe_sender.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/child_process_messages.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/common/content_switches.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ipc/ipc_logging.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ipc/ipc_switches.h" 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ipc/ipc_sync_channel.h" 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ipc/ipc_sync_message_filter.h" 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "webkit/glue/webkit_glue.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/handle_enumerator_win.h" 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 38bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch#if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED) 39bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch#include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h" 40bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch#endif 41bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using tracked_objects::ThreadData; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// How long to wait for a connection to the browser process before giving up. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int kConnectionTimeoutS = 15; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 50eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochbase::LazyInstance<base::ThreadLocalPointer<ChildThread> > g_lazy_tls = 51eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch LAZY_INSTANCE_INITIALIZER; 52eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This isn't needed on Windows because there the sandbox's job object 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// terminates child processes automatically. For unsandboxed processes (i.e. 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// plugins), PluginThread has EnsureTerminateMessageFilter. 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_POSIX) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class SuicideOnChannelErrorFilter : public IPC::ChannelProxy::MessageFilter { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // IPC::ChannelProxy::MessageFilter 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnChannelError() OVERRIDE { 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // For renderer/worker processes: 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // On POSIX, at least, one can install an unload handler which loops 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // forever and leave behind a renderer process which eats 100% CPU forever. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is because the terminate signals (ViewMsg_ShouldClose and the error 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // from the IPC channel) are routed to the main message loop but never 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // processed (because that message loop is stuck in V8). 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // One could make the browser SIGKILL the renderers, but that leaves open a 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // large window where a browser failure (or a user, manually terminating 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the browser because "it's stuck") will leave behind a process eating all 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the CPU. 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // So, we install a filter on the channel so that we can process this event 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // here and kill the process. 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We want to kill this process after giving it 30 seconds to run the exit 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // handlers. SIGALRM has a default disposition of terminating the 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // application. 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kChildCleanExit)) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) alarm(30); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) _exit(0); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~SuicideOnChannelErrorFilter() {} 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // OS(POSIX) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 93eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if defined(OS_ANDROID) 94eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen MurdochChildThread* g_child_thread; 95eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 96eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochvoid QuitMainThreadMessageLoop() { 97eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch base::MessageLoop::current()->Quit(); 98eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch} 99eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 100eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 101eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ChildThread::ChildThread() 105c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) : channel_connected_factory_(this) { 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_name_ = CommandLine::ForCurrentProcess()->GetSwitchValueASCII( 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switches::kProcessChannelID); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Init(); 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ChildThread::ChildThread(const std::string& channel_name) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : channel_name_(channel_name), 113c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) channel_connected_factory_(this) { 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Init(); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::Init() { 118eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch g_lazy_tls.Pointer()->Set(this); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) on_channel_error_called_ = false; 120c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) message_loop_ = base::MessageLoop::current(); 121c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) channel_.reset( 122c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) new IPC::SyncChannel(channel_name_, 123c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) IPC::Channel::MODE_CLIENT, 124c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) this, 125c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ChildProcess::current()->io_message_loop_proxy(), 126c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) true, 127c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ChildProcess::current()->GetShutDownEvent())); 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef IPC_MESSAGE_LOG_ENABLED 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC::Logging::GetInstance()->SetIPCSender(this); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_dispatcher_.reset(new ResourceDispatcher(this)); 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) socket_stream_dispatcher_.reset(new SocketStreamDispatcher()); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_system_dispatcher_.reset(new FileSystemDispatcher()); 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) quota_dispatcher_.reset(new QuotaDispatcher()); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) sync_message_filter_ = 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new IPC::SyncMessageFilter(ChildProcess::current()->GetShutDownEvent()); 1397d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) thread_safe_sender_ = new ThreadSafeSender( 1407d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) base::MessageLoopProxy::current().get(), sync_message_filter_.get()); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) histogram_message_filter_ = new ChildHistogramMessageFilter(); 142868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) resource_message_filter_ = 143868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) new ChildResourceMessageFilter(resource_dispatcher()); 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->AddFilter(histogram_message_filter_.get()); 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->AddFilter(sync_message_filter_.get()); 147a93a17c8d99d686bd4a1511e5504e5e6cc9fcadfTorne (Richard Coles) channel_->AddFilter(new tracing::ChildTraceMessageFilter( 1482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ChildProcess::current()->io_message_loop_proxy())); 149868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) channel_->AddFilter(resource_message_filter_.get()); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_POSIX) 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Check that --process-type is specified so we don't do this in unit tests 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // and single-process mode. 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kProcessType)) 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->AddFilter(new SuicideOnChannelErrorFilter()); 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1587dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTraceToConsole)) { 1597dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch std::string category_string = 1607dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch CommandLine::ForCurrentProcess()->GetSwitchValueASCII( 1617dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch switches::kTraceToConsole); 1627dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1637dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (!category_string.size()) 1647dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch category_string = "*"; 1657dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1667dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch base::debug::TraceLog::GetInstance()->SetEnabled( 1677dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch base::debug::CategoryFilter(category_string), 1687dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch base::debug::TraceLog::ECHO_TO_CONSOLE); 1697dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 1707dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 171c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->PostDelayedTask( 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&ChildThread::EnsureConnected, 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_connected_factory_.GetWeakPtr()), 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeDelta::FromSeconds(kConnectionTimeoutS)); 176eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 177eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if defined(OS_ANDROID) 178eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch g_child_thread = this; 179eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 180bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch 181bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch#if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED) 182bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch trace_memory_controller_.reset(new base::debug::TraceMemoryController( 183bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch message_loop_->message_loop_proxy(), 184bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch ::HeapProfilerWithPseudoStackStart, 185bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch ::HeapProfilerStop, 186bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch ::GetHeapProfile)); 187bbcdd45c55eb7c4641ab97aef9889b0fc828e7d3Ben Murdoch#endif 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ChildThread::~ChildThread() { 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef IPC_MESSAGE_LOG_ENABLED 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC::Logging::GetInstance()->SetIPCSender(NULL); 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->RemoveFilter(histogram_message_filter_.get()); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->RemoveFilter(sync_message_filter_.get()); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The ChannelProxy object caches a pointer to the IPC thread, so need to 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // reset it as it's not guaranteed to outlive this object. 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NOTE: this also has the side-effect of not closing the main IPC channel to 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the browser process. This is needed because this is the signal that the 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // browser uses to know that this process has died, so we need it to be alive 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // until this process is shut down, and the OS closes the handle 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // automatically. We used to watch the object handle on Windows to do this, 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // but it wasn't possible to do so on POSIX. 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_->ClearIPCTaskRunner(); 207eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch g_lazy_tls.Pointer()->Set(NULL); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 210a3f7b4e666c476898878fa745f637129375cd889Ben Murdochvoid ChildThread::Shutdown() { 211a3f7b4e666c476898878fa745f637129375cd889Ben Murdoch // Delete objects that hold references to blink so derived classes can 212a3f7b4e666c476898878fa745f637129375cd889Ben Murdoch // safely shutdown blink in their Shutdown implementation. 213a3f7b4e666c476898878fa745f637129375cd889Ben Murdoch file_system_dispatcher_.reset(); 214a3f7b4e666c476898878fa745f637129375cd889Ben Murdoch} 215a3f7b4e666c476898878fa745f637129375cd889Ben Murdoch 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnChannelConnected(int32 peer_pid) { 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) channel_connected_factory_.InvalidateWeakPtrs(); 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnChannelError() { 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) set_on_channel_error_called(true); 222c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->Quit(); 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool ChildThread::Send(IPC::Message* msg) { 226c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(base::MessageLoop::current() == message_loop()); 227c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (!channel_) { 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete msg; 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return channel_->Send(msg); 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::AddRoute(int32 routing_id, IPC::Listener* listener) { 236c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(base::MessageLoop::current() == message_loop()); 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) router_.AddRoute(routing_id, listener); 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::RemoveRoute(int32 routing_id) { 242c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(base::MessageLoop::current() == message_loop()); 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) router_.RemoveRoute(routing_id); 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)webkit_glue::ResourceLoaderBridge* ChildThread::CreateBridge( 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info) { 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return resource_dispatcher()->CreateBridge(request_info); 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)base::SharedMemory* ChildThread::AllocateSharedMemory(size_t buf_size) { 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return AllocateSharedMemory(buf_size, this); 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::SharedMemory* ChildThread::AllocateSharedMemory( 2582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) size_t buf_size, 2592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) IPC::Sender* sender) { 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_ptr<base::SharedMemory> shared_buf; 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) shared_buf.reset(new base::SharedMemory); 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!shared_buf->CreateAndMapAnonymous(buf_size)) { 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // On POSIX, we need to ask the browser to create the shared memory for us, 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // since this is blocked by the sandbox. 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::SharedMemoryHandle shared_mem_handle; 2712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (sender->Send(new ChildProcessHostMsg_SyncAllocateSharedMemory( 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) buf_size, &shared_mem_handle))) { 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (base::SharedMemory::IsHandleValid(shared_mem_handle)) { 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) shared_buf.reset(new base::SharedMemory(shared_mem_handle, false)); 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!shared_buf->Map(buf_size)) { 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Map failed"; 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Browser failed to allocate shared memory"; 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "Browser allocation request message failed"; 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return shared_buf.release(); 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool ChildThread::OnMessageReceived(const IPC::Message& msg) { 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Resource responses are sent to the resource dispatcher. 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (resource_dispatcher_->OnMessageReceived(msg)) 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (socket_stream_dispatcher_->OnMessageReceived(msg)) 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (file_system_dispatcher_->OnMessageReceived(msg)) 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (quota_dispatcher_->OnMessageReceived(msg)) 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool handled = true; 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_BEGIN_MESSAGE_MAP(ChildThread, msg) 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_Shutdown, OnShutdown) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(IPC_MESSAGE_LOG_ENABLED) 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_SetIPCLoggingEnabled, 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnSetIPCLoggingEnabled) 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_SetProfilerStatus, 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnSetProfilerStatus) 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_GetChildProfilerData, 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnGetChildProfilerData) 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_DumpHandles, OnDumpHandles) 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_TCMALLOC) 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_HANDLER(ChildProcessMsg_GetTcmallocStats, OnGetTcmallocStats) 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_MESSAGE_UNHANDLED(handled = false) 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC_END_MESSAGE_MAP() 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (handled) 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (msg.routing_id() == MSG_ROUTING_CONTROL) 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return OnControlMessageReceived(msg); 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return router_.OnMessageReceived(msg); 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool ChildThread::OnControlMessageReceived(const IPC::Message& msg) { 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnShutdown() { 334c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->Quit(); 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(IPC_MESSAGE_LOG_ENABLED) 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnSetIPCLoggingEnabled(bool enable) { 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (enable) 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC::Logging::GetInstance()->Enable(); 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IPC::Logging::GetInstance()->Disable(); 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // IPC_MESSAGE_LOG_ENABLED 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnSetProfilerStatus(ThreadData::Status status) { 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ThreadData::InitializeAndSetTrackingStatus(status); 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnGetChildProfilerData(int sequence_number) { 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tracked_objects::ProcessDataSnapshot process_data; 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ThreadData::Snapshot(false, &process_data); 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Send(new ChildProcessHostMsg_ChildProfilerData(sequence_number, 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) process_data)); 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnDumpHandles() { 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<HandleEnumerator> handle_enum( 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new HandleEnumerator( 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CommandLine::ForCurrentProcess()->HasSwitch( 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switches::kAuditAllHandles))); 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) handle_enum->EnumerateHandles(); 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Send(new ChildProcessHostMsg_DumpHandlesDone); 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTIMPLEMENTED(); 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_TCMALLOC) 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnGetTcmallocStats() { 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string result; 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char buffer[1024 * 32]; 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::allocator::GetStats(buffer, sizeof(buffer)); 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result.append(buffer); 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Send(new ChildProcessHostMsg_TcmallocStats(result)); 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ChildThread* ChildThread::current() { 383eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch return g_lazy_tls.Pointer()->Get(); 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 386eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if defined(OS_ANDROID) 387eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochvoid ChildThread::ShutdownThread() { 388eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch DCHECK_NE(base::MessageLoop::current(), g_child_thread->message_loop()); 389eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch g_child_thread->message_loop()->PostTask( 390eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch FROM_HERE, base::Bind(&QuitMainThreadMessageLoop)); 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 393eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 394eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::OnProcessFinalRelease() { 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (on_channel_error_called_) { 397c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop::current()->Quit(); 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The child process shutdown sequence is a request response based mechanism, 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // where we send out an initial feeler request to the child process host 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // instance in the browser to verify if it's ok to shutdown the child process. 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The browser then sends back a response if it's ok to shutdown. This avoids 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // race conditions if the process refcount is 0 but there's an IPC message 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // inflight that would addref it. 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Send(new ChildProcessHostMsg_ShutdownRequest); 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ChildThread::EnsureConnected() { 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(INFO) << "ChildThread::EnsureConnected()"; 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::KillProcess(base::GetCurrentProcessHandle(), 0, false); 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 416