blob: 02b8929e73107c3fc40c562bd08607c136485e81 [file] [log] [blame]
// 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 "content/child/child_thread_impl.h"
#include <signal.h>
#include <string>
#include <utility>
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/clang_coverage_buildflags.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/debug/alias.h"
#include "base/debug/leak_annotations.h"
#include "base/debug/profiler.h"
#include "base/files/file.h"
#include "base/lazy_instance.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/memory_pressure_listener.h"
#include "base/message_loop/timer_slack.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram_macros.h"
#include "base/no_destructor.h"
#include "base/power_monitor/power_monitor.h"
#include "base/process/process.h"
#include "base/process/process_handle.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/synchronization/condition_variable.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread_local.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/timer/elapsed_timer.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "components/tracing/child/background_tracing_agent_impl.h"
#include "components/tracing/child/background_tracing_agent_provider_impl.h"
#include "content/child/browser_exposed_child_interfaces.h"
#include "content/child/child_process.h"
#include "content/child/thread_safe_sender.h"
#include "content/common/child_process.mojom.h"
#include "content/common/field_trial_recorder.mojom.h"
#include "content/common/in_process_child_thread_params.h"
#include "content/public/common/connection_filter.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/service_manager_connection.h"
#include "content/public/common/service_names.mojom.h"
#include "content/public/common/simple_connection_filter.h"
#include "ipc/ipc_channel_mojo.h"
#include "ipc/ipc_logging.h"
#include "ipc/ipc_platform_file.h"
#include "ipc/ipc_sync_channel.h"
#include "ipc/ipc_sync_message_filter.h"
#include "mojo/core/embedder/scoped_ipc_support.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "mojo/public/cpp/platform/named_platform_channel.h"
#include "mojo/public/cpp/platform/platform_channel.h"
#include "mojo/public/cpp/platform/platform_channel_endpoint.h"
#include "mojo/public/cpp/platform/platform_handle.h"
#include "mojo/public/cpp/system/buffer.h"
#include "mojo/public/cpp/system/invitation.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "services/device/public/cpp/power_monitor/power_monitor_broadcast_source.h"
#include "services/resource_coordinator/public/cpp/memory_instrumentation/client_process_impl.h"
#include "services/resource_coordinator/public/mojom/memory_instrumentation/memory_instrumentation.mojom.h"
#include "services/service_manager/embedder/switches.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "services/service_manager/sandbox/sandbox_type.h"
#if defined(OS_POSIX)
#include "base/posix/global_descriptors.h"
#include "content/public/common/content_descriptors.h"
#endif
#if defined(OS_MACOSX)
#include "base/mac/mach_port_rendezvous.h"
#endif
#if BUILDFLAG(CLANG_COVERAGE)
#include <stdio.h>
#if defined(OS_WIN)
#include <io.h>
#endif
// Function provided by libclang_rt.profile-*.a, declared and documented at:
// https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/profile/InstrProfiling.h
extern "C" void __llvm_profile_set_file_object(FILE* File, int EnableMerge);
#endif
namespace content {
namespace {
// How long to wait for a connection to the browser process before giving up.
const int kConnectionTimeoutS = 15;
base::LazyInstance<base::ThreadLocalPointer<ChildThreadImpl>>::DestructorAtExit
g_lazy_child_thread_impl_tls = LAZY_INSTANCE_INITIALIZER;
// This isn't needed on Windows because there the sandbox's job object
// terminates child processes automatically. For unsandboxed processes (i.e.
// plugins), PluginThread has EnsureTerminateMessageFilter.
#if defined(OS_POSIX)
#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
defined(UNDEFINED_SANITIZER)
// A thread delegate that waits for |duration| and then exits the process
// immediately, without executing finalizers.
class WaitAndExitDelegate : public base::PlatformThread::Delegate {
public:
explicit WaitAndExitDelegate(base::TimeDelta duration)
: duration_(duration) {}
void ThreadMain() override {
base::PlatformThread::Sleep(duration_);
base::Process::TerminateCurrentProcessImmediately(0);
}
private:
const base::TimeDelta duration_;
DISALLOW_COPY_AND_ASSIGN(WaitAndExitDelegate);
};
bool CreateWaitAndExitThread(base::TimeDelta duration) {
std::unique_ptr<WaitAndExitDelegate> delegate(
new WaitAndExitDelegate(duration));
const bool thread_created =
base::PlatformThread::CreateNonJoinable(0, delegate.get());
if (!thread_created)
return false;
// A non joinable thread has been created. The thread will either terminate
// the process or will be terminated by the process. Therefore, keep the
// delegate object alive for the lifetime of the process.
WaitAndExitDelegate* leaking_delegate = delegate.release();
ANNOTATE_LEAKING_OBJECT_PTR(leaking_delegate);
ignore_result(leaking_delegate);
return true;
}
#endif
class SuicideOnChannelErrorFilter : public IPC::MessageFilter {
public:
// IPC::MessageFilter
void OnChannelError() override {
// For renderer/worker processes:
// On POSIX, at least, one can install an unload handler which loops
// forever and leave behind a renderer process which eats 100% CPU forever.
//
// This is because the terminate signals (FrameMsg_BeforeUnload and the
// error from the IPC sender) are routed to the main message loop but never
// processed (because that message loop is stuck in V8).
//
// One could make the browser SIGKILL the renderers, but that leaves open a
// large window where a browser failure (or a user, manually terminating
// the browser because "it's stuck") will leave behind a process eating all
// the CPU.
//
// So, we install a filter on the sender so that we can process this event
// here and kill the process.
base::debug::StopProfiling();
#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
defined(UNDEFINED_SANITIZER)
// Some sanitizer tools rely on exit handlers (e.g. to run leak detection,
// or dump code coverage data to disk). Instead of exiting the process
// immediately, we give it 60 seconds to run exit handlers.
CHECK(CreateWaitAndExitThread(base::TimeDelta::FromSeconds(60)));
#if defined(LEAK_SANITIZER)
// Invoke LeakSanitizer early to avoid detecting shutdown-only leaks. If
// leaks are found, the process will exit here.
__lsan_do_leak_check();
#endif
#else
base::Process::TerminateCurrentProcessImmediately(0);
#endif
}
protected:
~SuicideOnChannelErrorFilter() override {}
};
#endif // OS(POSIX)
mojo::IncomingInvitation InitializeMojoIPCChannel() {
TRACE_EVENT0("startup", "InitializeMojoIPCChannel");
mojo::PlatformChannelEndpoint endpoint;
#if defined(OS_WIN)
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
mojo::PlatformChannel::kHandleSwitch)) {
endpoint = mojo::PlatformChannel::RecoverPassedEndpointFromCommandLine(
*base::CommandLine::ForCurrentProcess());
} else {
// If this process is elevated, it will have a pipe path passed on the
// command line.
endpoint = mojo::NamedPlatformChannel::ConnectToServer(
*base::CommandLine::ForCurrentProcess());
}
#elif defined(OS_FUCHSIA)
endpoint = mojo::PlatformChannel::RecoverPassedEndpointFromCommandLine(
*base::CommandLine::ForCurrentProcess());
#elif defined(OS_MACOSX)
auto* client = base::MachPortRendezvousClient::GetInstance();
if (!client) {
LOG(ERROR) << "Mach rendezvous failed, terminating process (parent died?)";
base::Process::TerminateCurrentProcessImmediately(0);
return {};
}
auto receive = client->TakeReceiveRight('mojo');
if (!receive.is_valid()) {
LOG(ERROR) << "Invalid PlatformChannel receive right";
return {};
}
endpoint =
mojo::PlatformChannelEndpoint(mojo::PlatformHandle(std::move(receive)));
#elif defined(OS_POSIX)
endpoint = mojo::PlatformChannelEndpoint(mojo::PlatformHandle(
base::ScopedFD(base::GlobalDescriptors::GetInstance()->Get(
service_manager::kMojoIPCChannel))));
#endif
return mojo::IncomingInvitation::Accept(
std::move(endpoint), MOJO_ACCEPT_INVITATION_FLAG_LEAK_TRANSPORT_ENDPOINT);
}
class ChannelBootstrapFilter : public ConnectionFilter {
public:
explicit ChannelBootstrapFilter(
mojo::PendingRemote<IPC::mojom::ChannelBootstrap> bootstrap)
: bootstrap_(std::move(bootstrap)) {}
private:
// ConnectionFilter:
void OnBindInterface(const service_manager::BindSourceInfo& source_info,
const std::string& interface_name,
mojo::ScopedMessagePipeHandle* interface_pipe,
service_manager::Connector* connector) override {
if (source_info.identity.name() != mojom::kBrowserServiceName &&
source_info.identity.name() != mojom::kSystemServiceName) {
return;
}
if (interface_name == IPC::mojom::ChannelBootstrap::Name_) {
DCHECK(bootstrap_.is_valid());
mojo::FusePipes(mojo::PendingReceiver<IPC::mojom::ChannelBootstrap>(
std::move(*interface_pipe)),
std::move(bootstrap_));
}
}
mojo::PendingRemote<IPC::mojom::ChannelBootstrap> bootstrap_;
DISALLOW_COPY_AND_ASSIGN(ChannelBootstrapFilter);
};
} // namespace
// Implements the mojom ChildProcess interface and lives on the IO thread.
class ChildThreadImpl::IOThreadState
: public base::RefCountedThreadSafe<IOThreadState>,
public mojom::ChildProcess {
public:
IOThreadState(
scoped_refptr<base::SequencedTaskRunner> main_thread_task_runner,
base::WeakPtr<ChildThreadImpl> weak_main_thread,
base::RepeatingClosure quit_closure,
ChildThreadImpl::Options::ServiceBinder service_binder,
bool wait_for_interface_binders,
mojo::PendingReceiver<mojom::ChildProcessHost> host_receiver)
: main_thread_task_runner_(std::move(main_thread_task_runner)),
weak_main_thread_(std::move(weak_main_thread)),
quit_closure_(std::move(quit_closure)),
service_binder_(std::move(service_binder)),
wait_for_interface_binders_(wait_for_interface_binders),
host_receiver_(std::move(host_receiver)) {}
void BindChildProcessReceiver(
mojo::PendingReceiver<mojom::ChildProcess> receiver) {
receiver_.Bind(std::move(receiver));
}
void ExposeInterfacesToBrowser(mojo::BinderMap binders) {
DCHECK(wait_for_interface_binders_);
wait_for_interface_binders_ = false;
interface_binders_ = std::move(binders);
std::vector<mojo::GenericPendingReceiver> pending_requests;
std::swap(pending_requests, pending_binding_requests_);
for (auto& receiver : pending_requests)
BindReceiver(std::move(receiver));
}
private:
friend class base::RefCountedThreadSafe<IOThreadState>;
~IOThreadState() override = default;
// mojom::ChildProcess:
void Initialize(mojo::PendingRemote<mojom::ChildProcessHostBootstrap>
bootstrap) override {
// The browser only calls this method once.
DCHECK(host_receiver_);
mojo::Remote<mojom::ChildProcessHostBootstrap>(std::move(bootstrap))
->BindProcessHost(std::move(host_receiver_));
}
void ProcessShutdown() override {
main_thread_task_runner_->PostTask(FROM_HERE,
base::BindOnce(quit_closure_));
}
#if defined(OS_MACOSX)
void GetTaskPort(GetTaskPortCallback callback) override {
mojo::ScopedHandle task_port = mojo::WrapMachPort(mach_task_self());
std::move(callback).Run(std::move(task_port));
}
#endif
#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
void SetIPCLoggingEnabled(bool enable) override {
main_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(
[](bool enable) {
if (enable)
IPC::Logging::GetInstance()->Enable();
else
IPC::Logging::GetInstance()->Disable();
},
enable));
}
#endif
void GetBackgroundTracingAgentProvider(
mojo::PendingReceiver<tracing::mojom::BackgroundTracingAgentProvider>
receiver) override {
main_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&ChildThreadImpl::GetBackgroundTracingAgentProvider,
weak_main_thread_, std::move(receiver)));
}
// Make sure this isn't inlined so it shows up in stack traces, and also make
// the function body unique by adding a log line, so it doesn't get merged
// with other functions by link time optimizations (ICF).
NOINLINE void CrashHungProcess() override {
LOG(ERROR) << "Crashing because hung";
IMMEDIATE_CRASH();
}
void RunService(const std::string& service_name,
mojo::PendingReceiver<service_manager::mojom::Service>
receiver) override {
main_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&ChildThreadImpl::RunService, weak_main_thread_,
service_name, std::move(receiver)));
}
void BindServiceInterface(mojo::GenericPendingReceiver receiver) override {
if (service_binder_)
service_binder_.Run(&receiver);
if (receiver) {
main_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&ChildThreadImpl::BindServiceInterface,
weak_main_thread_, std::move(receiver)));
}
}
void BindReceiver(mojo::GenericPendingReceiver receiver) override {
if (wait_for_interface_binders_) {
pending_binding_requests_.push_back(std::move(receiver));
return;
}
if (interface_binders_.Bind(&receiver))
return;
main_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&ChildThreadImpl::OnBindReceiver,
weak_main_thread_, std::move(receiver)));
}
#if BUILDFLAG(CLANG_COVERAGE)
void SetCoverageFile(base::File file) override {
// TODO(crbug.com/985574) Remove Android check when possible.
#if defined(OS_POSIX) && !defined(OS_ANDROID)
// Take the file descriptor so that |file| does not close it.
int fd = file.TakePlatformFile();
FILE* f = fdopen(fd, "r+b");
__llvm_profile_set_file_object(f, 1);
#elif defined(OS_WIN)
HANDLE handle = file.TakePlatformFile();
int fd = _open_osfhandle((intptr_t)handle, 0);
FILE* f = _fdopen(fd, "r+b");
__llvm_profile_set_file_object(f, 1);
#endif
}
#endif
const scoped_refptr<base::SequencedTaskRunner> main_thread_task_runner_;
const base::WeakPtr<ChildThreadImpl> weak_main_thread_;
const base::RepeatingClosure quit_closure_;
ChildThreadImpl::Options::ServiceBinder service_binder_;
mojo::BinderMap interface_binders_;
bool wait_for_interface_binders_;
mojo::Receiver<mojom::ChildProcess> receiver_{this};
mojo::PendingReceiver<mojom::ChildProcessHost> host_receiver_;
// Binding requests which should be handled by |interface_binders|, but which
// have been queued because |allow_interface_binders_| is still |false|.
std::vector<mojo::GenericPendingReceiver> pending_binding_requests_;
DISALLOW_COPY_AND_ASSIGN(IOThreadState);
};
ChildThread* ChildThread::Get() {
return ChildThreadImpl::current();
}
ChildThreadImpl::Options::Options() : connect_to_browser(false) {}
ChildThreadImpl::Options::Options(const Options& other) = default;
ChildThreadImpl::Options::~Options() {
}
ChildThreadImpl::Options::Builder::Builder() {
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::InBrowserProcess(
const InProcessChildThreadParams& params) {
options_.browser_process_io_runner = params.io_runner();
options_.in_process_service_request_token = params.service_request_token();
options_.mojo_invitation = params.mojo_invitation();
return *this;
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::ConnectToBrowser(
bool connect_to_browser_parms) {
options_.connect_to_browser = connect_to_browser_parms;
return *this;
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::AddStartupFilter(
IPC::MessageFilter* filter) {
options_.startup_filters.push_back(filter);
return *this;
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::IPCTaskRunner(
scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner_parms) {
options_.ipc_task_runner = ipc_task_runner_parms;
return *this;
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::ServiceBinder(
ChildThreadImpl::Options::ServiceBinder binder) {
options_.service_binder = std::move(binder);
return *this;
}
ChildThreadImpl::Options::Builder&
ChildThreadImpl::Options::Builder::ExposesInterfacesToBrowser() {
options_.exposes_interfaces_to_browser = true;
return *this;
}
ChildThreadImpl::Options ChildThreadImpl::Options::Builder::Build() {
return options_;
}
ChildThreadImpl::ChildThreadMessageRouter::ChildThreadMessageRouter(
IPC::Sender* sender)
: sender_(sender) {}
bool ChildThreadImpl::ChildThreadMessageRouter::Send(IPC::Message* msg) {
return sender_->Send(msg);
}
bool ChildThreadImpl::ChildThreadMessageRouter::RouteMessage(
const IPC::Message& msg) {
bool handled = IPC::MessageRouter::RouteMessage(msg);
#if defined(OS_ANDROID)
if (!handled && msg.is_sync()) {
IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg);
reply->set_reply_error();
Send(reply);
}
#endif
return handled;
}
ChildThreadImpl::ChildThreadImpl(base::RepeatingClosure quit_closure)
: ChildThreadImpl(std::move(quit_closure), Options::Builder().Build()) {}
ChildThreadImpl::ChildThreadImpl(base::RepeatingClosure quit_closure,
const Options& options)
: router_(this),
quit_closure_(std::move(quit_closure)),
browser_process_io_runner_(options.browser_process_io_runner),
channel_connected_factory_(
new base::WeakPtrFactory<ChildThreadImpl>(this)),
ipc_task_runner_(options.ipc_task_runner) {
mojo::PendingRemote<mojom::ChildProcessHost> remote_host;
auto host_receiver = remote_host.InitWithNewPipeAndPassReceiver();
child_process_host_ = mojo::SharedRemote<mojom::ChildProcessHost>(
std::move(remote_host), GetIOTaskRunner());
io_thread_state_ = base::MakeRefCounted<IOThreadState>(
base::ThreadTaskRunnerHandle::Get(), weak_factory_.GetWeakPtr(),
quit_closure_, std::move(options.service_binder),
options.exposes_interfaces_to_browser, std::move(host_receiver));
Init(options);
}
scoped_refptr<base::SingleThreadTaskRunner> ChildThreadImpl::GetIOTaskRunner() {
if (IsInBrowserProcess())
return browser_process_io_runner_;
return ChildProcess::current()->io_task_runner();
}
void ChildThreadImpl::SetFieldTrialGroup(const std::string& trial_name,
const std::string& group_name) {
if (field_trial_syncer_)
field_trial_syncer_->OnSetFieldTrialGroup(trial_name, group_name);
}
void ChildThreadImpl::OnFieldTrialGroupFinalized(
const std::string& trial_name,
const std::string& group_name) {
mojo::Remote<mojom::FieldTrialRecorder> field_trial_recorder;
BindHostReceiver(field_trial_recorder.BindNewPipeAndPassReceiver());
field_trial_recorder->FieldTrialActivated(trial_name);
}
void ChildThreadImpl::ConnectChannel() {
DCHECK(service_manager_connection_);
mojo::PendingRemote<IPC::mojom::ChannelBootstrap> bootstrap;
mojo::ScopedMessagePipeHandle handle =
bootstrap.InitWithNewPipeAndPassReceiver().PassPipe();
service_manager_connection_->AddConnectionFilter(
std::make_unique<ChannelBootstrapFilter>(std::move(bootstrap)));
channel_->Init(
IPC::ChannelMojo::CreateClientFactory(
std::move(handle), ChildProcess::current()->io_task_runner(),
ipc_task_runner_ ? ipc_task_runner_
: base::ThreadTaskRunnerHandle::Get()),
true /* create_pipe_now */);
}
void ChildThreadImpl::Init(const Options& options) {
TRACE_EVENT0("startup", "ChildThreadImpl::Init");
g_lazy_child_thread_impl_tls.Pointer()->Set(this);
on_channel_error_called_ = false;
main_thread_runner_ = base::ThreadTaskRunnerHandle::Get();
#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
// We must make sure to instantiate the IPC Logger *before* we create the
// channel, otherwise we can get a callback on the IO thread which creates
// the logger, and the logger does not like being created on the IO thread.
IPC::Logging::GetInstance();
#endif
channel_ = IPC::SyncChannel::Create(
this, ChildProcess::current()->io_task_runner(),
ipc_task_runner_ ? ipc_task_runner_ : base::ThreadTaskRunnerHandle::Get(),
ChildProcess::current()->GetShutDownEvent());
#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
if (!IsInBrowserProcess())
IPC::Logging::GetInstance()->SetIPCSender(this);
#endif
mojo::ScopedMessagePipeHandle service_request_pipe;
if (!IsInBrowserProcess()) {
mojo_ipc_support_.reset(new mojo::core::ScopedIPCSupport(
GetIOTaskRunner(), mojo::core::ScopedIPCSupport::ShutdownPolicy::FAST));
mojo::IncomingInvitation invitation = InitializeMojoIPCChannel();
std::string service_request_token =
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
service_manager::switches::kServiceRequestChannelToken);
if (!service_request_token.empty()) {
service_request_pipe =
invitation.ExtractMessagePipe(service_request_token);
}
} else {
service_request_pipe = options.mojo_invitation->ExtractMessagePipe(
options.in_process_service_request_token);
}
if (service_request_pipe.is_valid()) {
service_manager_connection_ = ServiceManagerConnection::Create(
service_manager::mojom::ServiceRequest(std::move(service_request_pipe)),
GetIOTaskRunner());
}
sync_message_filter_ = channel_->CreateSyncMessageFilter();
thread_safe_sender_ =
new ThreadSafeSender(main_thread_runner_, sync_message_filter_.get());
auto registry = std::make_unique<service_manager::BinderRegistry>();
registry->AddInterface(
base::BindRepeating(&IOThreadState::BindChildProcessReceiver,
io_thread_state_),
ChildThreadImpl::GetIOTaskRunner());
service_manager_connection_->AddConnectionFilter(
std::make_unique<SimpleConnectionFilter>(std::move(registry)));
// In single process mode, browser-side tracing and memory will cover the
// whole process including renderers.
if (!IsInBrowserProcess()) {
mojo::PendingRemote<memory_instrumentation::mojom::Coordinator> coordinator;
mojo::PendingRemote<memory_instrumentation::mojom::ClientProcess> process;
auto process_receiver = process.InitWithNewPipeAndPassReceiver();
mojo::Remote<memory_instrumentation::mojom::CoordinatorConnector> connector;
BindHostReceiver(connector.BindNewPipeAndPassReceiver());
connector->RegisterCoordinatorClient(
coordinator.InitWithNewPipeAndPassReceiver(), std::move(process));
memory_instrumentation::ClientProcessImpl::CreateInstance(
std::move(process_receiver), std::move(coordinator));
}
// In single process mode we may already have initialized the power monitor,
if (!base::PowerMonitor::IsInitialized()) {
auto power_monitor_source =
std::make_unique<device::PowerMonitorBroadcastSource>(
GetIOTaskRunner());
auto* source_ptr = power_monitor_source.get();
base::PowerMonitor::Initialize(std::move(power_monitor_source));
// The two-phase init is necessary to ensure that the process-wide
// PowerMonitor is set before the power monitor source receives incoming
// communication from the browser process (see https://crbug.com/821790 for
// details)
mojo::PendingRemote<device::mojom::PowerMonitor> remote_power_monitor;
BindHostReceiver(remote_power_monitor.InitWithNewPipeAndPassReceiver());
source_ptr->Init(std::move(remote_power_monitor));
}
#if defined(OS_POSIX)
// Check that --process-type is specified so we don't do this in unit tests
// and single-process mode.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kProcessType))
channel_->AddFilter(new SuicideOnChannelErrorFilter());
#endif
// Add filters passed here via options.
for (auto* startup_filter : options.startup_filters) {
channel_->AddFilter(startup_filter);
}
ConnectChannel();
// This must always be done after ConnectChannel, because ConnectChannel() may
// add a ConnectionFilter to the connection.
if (service_manager_connection_)
StartServiceManagerConnection();
int connection_timeout = kConnectionTimeoutS;
std::string connection_override =
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kIPCConnectionTimeout);
if (!connection_override.empty()) {
int temp;
if (base::StringToInt(connection_override, &temp))
connection_timeout = temp;
}
main_thread_runner_->PostDelayedTask(
FROM_HERE,
base::BindOnce(&ChildThreadImpl::EnsureConnected,
channel_connected_factory_->GetWeakPtr()),
base::TimeDelta::FromSeconds(connection_timeout));
// In single-process mode, there is no need to synchronize trials to the
// browser process (because it's the same process).
if (!IsInBrowserProcess()) {
field_trial_syncer_.reset(
new variations::ChildProcessFieldTrialSyncer(this));
field_trial_syncer_->InitFieldTrialObserving(
*base::CommandLine::ForCurrentProcess());
}
}
ChildThreadImpl::~ChildThreadImpl() {
#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
IPC::Logging::GetInstance()->SetIPCSender(NULL);
#endif
channel_->RemoveFilter(sync_message_filter_.get());
// The ChannelProxy object caches a pointer to the IPC thread, so need to
// reset it as it's not guaranteed to outlive this object.
// NOTE: this also has the side-effect of not closing the main IPC channel to
// the browser process. This is needed because this is the signal that the
// browser uses to know that this process has died, so we need it to be alive
// until this process is shut down, and the OS closes the handle
// automatically. We used to watch the object handle on Windows to do this,
// but it wasn't possible to do so on POSIX.
channel_->ClearIPCTaskRunner();
g_lazy_child_thread_impl_tls.Pointer()->Set(nullptr);
}
void ChildThreadImpl::Shutdown() {
// Ensure that our IOThreadState's last ref goes away on the IO thread.
ChildThreadImpl::GetIOTaskRunner()->PostTask(
FROM_HERE, base::BindOnce([](scoped_refptr<IOThreadState>) {},
std::move(io_thread_state_)));
}
bool ChildThreadImpl::ShouldBeDestroyed() {
return true;
}
void ChildThreadImpl::OnChannelConnected(int32_t peer_pid) {
channel_connected_factory_.reset();
}
void ChildThreadImpl::OnChannelError() {
on_channel_error_called_ = true;
// If this thread runs in the browser process, only Thread::Stop should
// stop its message loop. Otherwise, QuitWhenIdle could race Thread::Stop.
if (!IsInBrowserProcess())
quit_closure_.Run();
}
bool ChildThreadImpl::Send(IPC::Message* msg) {
DCHECK(main_thread_runner_->BelongsToCurrentThread());
if (!channel_) {
delete msg;
return false;
}
return channel_->Send(msg);
}
#if defined(OS_WIN)
void ChildThreadImpl::PreCacheFont(const LOGFONT& log_font) {
GetFontCacheWin()->PreCacheFont(log_font);
}
void ChildThreadImpl::ReleaseCachedFonts() {
GetFontCacheWin()->ReleaseCachedFonts();
}
const mojo::Remote<mojom::FontCacheWin>& ChildThreadImpl::GetFontCacheWin() {
if (!font_cache_win_)
BindHostReceiver(font_cache_win_.BindNewPipeAndPassReceiver());
return font_cache_win_;
}
#endif
void ChildThreadImpl::RecordAction(const base::UserMetricsAction& action) {
NOTREACHED();
}
void ChildThreadImpl::RecordComputedAction(const std::string& action) {
NOTREACHED();
}
void ChildThreadImpl::BindHostReceiver(mojo::GenericPendingReceiver receiver) {
child_process_host_->BindHostReceiver(std::move(receiver));
}
IPC::MessageRouter* ChildThreadImpl::GetRouter() {
DCHECK(main_thread_runner_->BelongsToCurrentThread());
return &router_;
}
mojom::RouteProvider* ChildThreadImpl::GetRemoteRouteProvider() {
if (!remote_route_provider_) {
DCHECK(channel_);
channel_->GetRemoteAssociatedInterface(&remote_route_provider_);
}
return remote_route_provider_.get();
}
bool ChildThreadImpl::OnMessageReceived(const IPC::Message& msg) {
if (msg.routing_id() == MSG_ROUTING_CONTROL)
return OnControlMessageReceived(msg);
return router_.OnMessageReceived(msg);
}
void ChildThreadImpl::OnAssociatedInterfaceRequest(
const std::string& interface_name,
mojo::ScopedInterfaceEndpointHandle handle) {
if (interface_name == mojom::RouteProvider::Name_) {
DCHECK(!route_provider_receiver_.is_bound());
route_provider_receiver_.Bind(
mojo::PendingAssociatedReceiver<mojom::RouteProvider>(
std::move(handle)),
ipc_task_runner_ ? ipc_task_runner_
: base::ThreadTaskRunnerHandle::Get());
} else {
LOG(ERROR) << "Receiver for unknown Channel-associated interface: "
<< interface_name;
}
}
void ChildThreadImpl::StartServiceManagerConnection() {
DCHECK(service_manager_connection_);
// NOTE: You must register any ConnectionFilter instances on
// |service_manager_connection_| *before* this call to |Start()|, otherwise
// incoming interface requests may race with the registration.
service_manager_connection_->Start();
}
void ChildThreadImpl::ExposeInterfacesToBrowser(mojo::BinderMap binders) {
// NOTE: Do not add new binders directly within this method. Instead, modify
// the definition of |ExposeChildInterfacesToBrowser()|, ensuring security
// review coverage.
ExposeChildInterfacesToBrowser(GetIOTaskRunner(), &binders);
ChildThreadImpl::GetIOTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&IOThreadState::ExposeInterfacesToBrowser,
io_thread_state_, std::move(binders)));
}
bool ChildThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
return false;
}
void ChildThreadImpl::GetBackgroundTracingAgentProvider(
mojo::PendingReceiver<tracing::mojom::BackgroundTracingAgentProvider>
receiver) {
if (!background_tracing_agent_provider_) {
background_tracing_agent_provider_ =
std::make_unique<tracing::BackgroundTracingAgentProviderImpl>();
}
background_tracing_agent_provider_->AddBinding(std::move(receiver));
}
void ChildThreadImpl::RunService(
const std::string& service_name,
mojo::PendingReceiver<service_manager::mojom::Service> receiver) {
DLOG(ERROR) << "Ignoring unhandled request to run service: " << service_name;
}
void ChildThreadImpl::BindServiceInterface(
mojo::GenericPendingReceiver receiver) {
DLOG(ERROR) << "Ignoring unhandled request to bind service interface: "
<< *receiver.interface_name();
}
void ChildThreadImpl::OnBindReceiver(mojo::GenericPendingReceiver receiver) {}
ChildThreadImpl* ChildThreadImpl::current() {
return g_lazy_child_thread_impl_tls.Pointer()->Get();
}
void ChildThreadImpl::OnProcessFinalRelease() {
if (on_channel_error_called_)
return;
quit_closure_.Run();
}
void ChildThreadImpl::EnsureConnected() {
VLOG(0) << "ChildThreadImpl::EnsureConnected()";
base::Process::TerminateCurrentProcessImmediately(0);
}
void ChildThreadImpl::GetRoute(
int32_t routing_id,
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterfaceProvider>
receiver) {
associated_interface_provider_receivers_.Add(this, std::move(receiver),
routing_id);
}
void ChildThreadImpl::GetAssociatedInterface(
const std::string& name,
mojo::PendingAssociatedReceiver<blink::mojom::AssociatedInterface>
receiver) {
int32_t routing_id =
associated_interface_provider_receivers_.current_context();
Listener* route = router_.GetRoute(routing_id);
if (route)
route->OnAssociatedInterfaceRequest(name, receiver.PassHandle());
}
bool ChildThreadImpl::IsInBrowserProcess() const {
return static_cast<bool>(browser_process_io_runner_);
}
} // namespace content