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content / browser / service_process_host_impl.cc [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include <utility>
#include "base/functional/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/no_destructor.h"
#include "base/not_fatal_until.h"
#include "base/observer_list.h"
#include "base/process/process.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/lock.h"
#include "content/browser/utility_process_host.h"
#include "content/common/child_process.mojom.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/service_process_host.h"
#include "content/public/browser/service_process_info.h"
#include "content/public/common/content_client.h"
#include "mojo/public/cpp/bindings/generic_pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "sandbox/policy/mojom/sandbox.mojom.h"
namespace content {
namespace {
// Changes to this function should be reviewed by a security person.
bool ShouldEnableSandbox(sandbox::mojom::Sandbox sandbox) {
if (sandbox == sandbox::mojom::Sandbox::kAudio)
return GetContentClient()->browser()->ShouldSandboxAudioService();
if (sandbox == sandbox::mojom::Sandbox::kNetwork)
return GetContentClient()->browser()->ShouldSandboxNetworkService();
return true;
}
// Internal helper to track running service processes.
class ServiceProcessTracker {
public:
ServiceProcessTracker() = default;
ServiceProcessTracker(const ServiceProcessTracker&) = delete;
ServiceProcessTracker& operator=(const ServiceProcessTracker&) = delete;
~ServiceProcessTracker() = default;
ServiceProcessInfo AddProcess(base::Process process,
const std::optional<GURL>& site,
const std::string& service_interface_name) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
auto id = GenerateNextId();
ServiceProcessInfo info(service_interface_name, site, id,
std::move(process));
auto info_dup = info.Duplicate();
processes_.insert({id, std::move(info)});
for (auto& observer : observers_)
observer.OnServiceProcessLaunched(info_dup);
return info_dup;
}
void NotifyTerminated(ServiceProcessId id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
auto iter = processes_.find(id);
CHECK(iter != processes_.end(), base::NotFatalUntil::M130);
for (auto& observer : observers_)
observer.OnServiceProcessTerminatedNormally(iter->second.Duplicate());
processes_.erase(iter);
}
void NotifyCrashed(ServiceProcessId id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
auto iter = processes_.find(id);
CHECK(iter != processes_.end(), base::NotFatalUntil::M130);
for (auto& observer : observers_)
observer.OnServiceProcessCrashed(iter->second.Duplicate());
processes_.erase(iter);
}
void AddObserver(ServiceProcessHost::Observer* observer) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
observers_.AddObserver(observer);
}
void RemoveObserver(ServiceProcessHost::Observer* observer) {
// NOTE: Some tests may remove observers after BrowserThreads are shut down.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
!BrowserThread::IsThreadInitialized(BrowserThread::UI));
observers_.RemoveObserver(observer);
}
std::vector<ServiceProcessInfo> GetProcesses() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::vector<ServiceProcessInfo> processes;
for (const auto& entry : processes_)
processes.push_back(entry.second.Duplicate());
return processes;
}
private:
ServiceProcessId GenerateNextId() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return service_process_id_generator_.GenerateNextId();
}
ServiceProcessId::Generator service_process_id_generator_;
std::map<ServiceProcessId, ServiceProcessInfo> processes_;
// Observers are owned and used exclusively on the UI thread.
base::ObserverList<ServiceProcessHost::Observer> observers_;
};
ServiceProcessTracker& GetServiceProcessTracker() {
static base::NoDestructor<ServiceProcessTracker> tracker;
return *tracker;
}
// Helper to bridge UtilityProcessHost IO thread events to the
// ServiceProcessTracker. Every UtilityProcessHost created for a service process
// has a unique instance of this class associated with it.
class UtilityProcessClient : public UtilityProcessHost::Client {
public:
UtilityProcessClient(
const std::string& service_interface_name,
const std::optional<GURL>& site,
base::OnceCallback<void(const base::Process&)> process_callback)
: service_interface_name_(service_interface_name),
site_(std::move(site)),
process_callback_(std::move(process_callback)) {}
UtilityProcessClient(const UtilityProcessClient&) = delete;
UtilityProcessClient& operator=(const UtilityProcessClient&) = delete;
~UtilityProcessClient() override = default;
// UtilityProcessHost::Client:
void OnProcessLaunched(const base::Process& process) override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
process_info_.emplace(GetServiceProcessTracker().AddProcess(
process.Duplicate(), site_, service_interface_name_));
if (process_callback_) {
std::move(process_callback_).Run(process);
}
}
void OnProcessTerminatedNormally() override {
GetServiceProcessTracker().NotifyTerminated(
process_info_->service_process_id());
}
void OnProcessCrashed() override {
// TODO(crbug.com/40654042): It is unclear how we can observe
// |OnProcessCrashed()| without observing |OnProcessLaunched()| first, but
// it can happen on Android. Ignore the notification in this case.
if (!process_info_)
return;
GetServiceProcessTracker().NotifyCrashed(
process_info_->service_process_id());
}
private:
const std::string service_interface_name_;
// Optional site GURL for per-site utility processes.
const std::optional<GURL> site_;
base::OnceCallback<void(const base::Process&)> process_callback_;
std::optional<ServiceProcessInfo> process_info_;
};
// TODO(crbug.com/40633267): Once UtilityProcessHost is used only by service
// processes, its logic can be inlined here.
void LaunchServiceProcess(mojo::GenericPendingReceiver receiver,
ServiceProcessHost::Options options,
sandbox::mojom::Sandbox sandbox) {
UtilityProcessHost* host =
new UtilityProcessHost(std::make_unique<UtilityProcessClient>(
*receiver.interface_name(), options.site,
std::move(options.process_callback)));
host->SetName(!options.display_name.empty()
? options.display_name
: base::UTF8ToUTF16(*receiver.interface_name()));
host->SetMetricsName(*receiver.interface_name());
if (!ShouldEnableSandbox(sandbox)) {
sandbox = sandbox::mojom::Sandbox::kNoSandbox;
}
host->SetSandboxType(sandbox);
host->SetExtraCommandLineSwitches(std::move(options.extra_switches));
if (options.child_flags) {
host->set_child_flags(*options.child_flags);
}
#if BUILDFLAG(IS_WIN)
if (!options.preload_libraries.empty()) {
host->SetPreloadLibraries(options.preload_libraries);
}
#endif // BUILDFLAG(IS_WIN)
if (options.allow_gpu_client.has_value() &&
options.allow_gpu_client.value()) {
host->SetAllowGpuClient();
}
host->Start();
host->GetChildProcess()->BindServiceInterface(std::move(receiver));
}
} // namespace
// static
std::vector<ServiceProcessInfo> ServiceProcessHost::GetRunningProcessInfo() {
return GetServiceProcessTracker().GetProcesses();
}
// static
void ServiceProcessHost::AddObserver(Observer* observer) {
GetServiceProcessTracker().AddObserver(observer);
}
// static
void ServiceProcessHost::RemoveObserver(Observer* observer) {
GetServiceProcessTracker().RemoveObserver(observer);
}
// static
void ServiceProcessHost::Launch(mojo::GenericPendingReceiver receiver,
Options options,
sandbox::mojom::Sandbox sandbox) {
DCHECK(receiver.interface_name().has_value());
if (GetUIThreadTaskRunner({})->BelongsToCurrentThread()) {
LaunchServiceProcess(std::move(receiver), std::move(options), sandbox);
} else {
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&LaunchServiceProcess, std::move(receiver),
std::move(options), sandbox));
}
}
} // namespace content