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// Copyright (c) 2011 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 "base/bind.h"
#include "base/command_line.h"
#include "base/debug/leak_annotations.h"
#include "base/message_loop/message_pump_type.h"
#include "base/power_monitor/power_monitor.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_executor.h"
#include "base/threading/platform_thread.h"
#include "base/timer/hi_res_timer_manager.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "content/child/child_process.h"
#include "content/common/content_switches_internal.h"
#include "content/common/partition_alloc_support.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/main_function_params.h"
#include "content/public/utility/content_utility_client.h"
#include "content/utility/utility_thread_impl.h"
#include "printing/buildflags/buildflags.h"
#include "sandbox/policy/mojom/sandbox.mojom.h"
#include "sandbox/policy/sandbox.h"
#include "sandbox/policy/sandbox_type.h"
#include "services/network/public/mojom/network_service.mojom.h"
#include "services/tracing/public/cpp/trace_startup.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "third_party/icu/source/common/unicode/unistr.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include "components/services/screen_ai/sandbox/screen_ai_sandbox_hook_linux.h"
#include "content/utility/speech/speech_recognition_sandbox_hook_linux.h"
#if BUILDFLAG(ENABLE_PRINTING)
#include "printing/sandbox/print_backend_sandbox_hook_linux.h"
#endif
#include "sandbox/policy/linux/sandbox_linux.h"
#include "services/audio/audio_sandbox_hook_linux.h"
#include "services/network/network_sandbox_hook_linux.h"
#endif
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
#include "gpu/config/gpu_info_collector.h"
#include "media/gpu/sandbox/hardware_video_decoding_sandbox_hook_linux.h"
// gn check is not smart enough to realize that this include only applies to
// Linux/ash-chrome and the BUILD.gn dependencies correctly account for that.
#include "third_party/angle/src/gpu_info_util/SystemInfo.h" // nogncheck
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "ash/services/ime/ime_sandbox_hook.h"
#include "chromeos/assistant/buildflags.h"
#include "chromeos/services/tts/tts_sandbox_hook.h"
#if BUILDFLAG(ENABLE_CROS_LIBASSISTANT)
#include "chromeos/services/libassistant/libassistant_sandbox_hook.h" // nogncheck
#endif // BUILDFLAG(ENABLE_CROS_LIBASSISTANT)
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
#if BUILDFLAG(IS_MAC)
#include "base/message_loop/message_pump_mac.h"
#endif
#if BUILDFLAG(IS_WIN)
#include "base/rand_util.h"
#include "base/win/windows_version.h"
#include "sandbox/win/src/sandbox.h"
sandbox::TargetServices* g_utility_target_services = nullptr;
#endif
namespace content {
namespace {
base::ThreadPriority GetIOThreadPriority(const std::string& utility_sub_type) {
return (base::FeatureList::IsEnabled(
features::kNetworkServiceUsesDisplayThreadPriority) &&
utility_sub_type == network::mojom::NetworkService::Name_)
? base::ThreadPriority::DISPLAY
: base::ThreadPriority::NORMAL;
}
} // namespace
// Mainline routine for running as the utility process.
int UtilityMain(MainFunctionParams parameters) {
base::MessagePumpType message_pump_type =
parameters.command_line->HasSwitch(switches::kMessageLoopTypeUi)
? base::MessagePumpType::UI
: base::MessagePumpType::DEFAULT;
#if BUILDFLAG(IS_MAC)
auto sandbox_type =
sandbox::policy::SandboxTypeFromCommandLine(*parameters.command_line);
if (sandbox_type != sandbox::mojom::Sandbox::kNoSandbox) {
// On Mac, the TYPE_UI pump for the main thread is an NSApplication loop.
// In a sandboxed utility process, NSApp attempts to acquire more Mach
// resources than a restrictive sandbox policy should allow. Services that
// require a TYPE_UI pump generally just need a NS/CFRunLoop to pump system
// work sources, so choose that pump type instead. A NSRunLoop MessagePump
// is used for TYPE_UI MessageLoops on non-main threads.
base::MessagePump::OverrideMessagePumpForUIFactory(
[]() -> std::unique_ptr<base::MessagePump> {
return std::make_unique<base::MessagePumpNSRunLoop>();
});
}
#endif
#if BUILDFLAG(IS_FUCHSIA)
// On Fuchsia always use IO threads to allow FIDL calls.
if (message_pump_type == base::MessagePumpType::DEFAULT)
message_pump_type = base::MessagePumpType::IO;
#endif // BUILDFLAG(IS_FUCHSIA)
if (parameters.command_line->HasSwitch(switches::kTimeZoneForTesting)) {
std::string time_zone = parameters.command_line->GetSwitchValueASCII(
switches::kTimeZoneForTesting);
icu::TimeZone::adoptDefault(
icu::TimeZone::createTimeZone(icu::UnicodeString(time_zone.c_str())));
}
// The main task executor of the utility process.
base::SingleThreadTaskExecutor main_thread_task_executor(message_pump_type);
base::PlatformThread::SetName("CrUtilityMain");
const std::string utility_sub_type =
parameters.command_line->GetSwitchValueASCII(switches::kUtilitySubType);
if (parameters.command_line->HasSwitch(switches::kUtilityStartupDialog)) {
auto dialog_match = parameters.command_line->GetSwitchValueASCII(
switches::kUtilityStartupDialog);
if (dialog_match.empty() || dialog_match == utility_sub_type) {
WaitForDebugger(utility_sub_type.empty() ? "Utility" : utility_sub_type);
}
}
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
// Initializes the sandbox before any threads are created.
// TODO(jorgelo): move this after GTK initialization when we enable a strict
// Seccomp-BPF policy.
auto sandbox_type =
sandbox::policy::SandboxTypeFromCommandLine(*parameters.command_line);
sandbox::policy::SandboxLinux::PreSandboxHook pre_sandbox_hook;
switch (sandbox_type) {
case sandbox::mojom::Sandbox::kNetwork:
pre_sandbox_hook = base::BindOnce(&network::NetworkPreSandboxHook);
break;
#if BUILDFLAG(ENABLE_OOP_PRINTING)
case sandbox::mojom::Sandbox::kPrintBackend:
pre_sandbox_hook = base::BindOnce(&printing::PrintBackendPreSandboxHook);
break;
#endif // BUILDFLAG(ENABLE_OOP_PRINTING)
case sandbox::mojom::Sandbox::kAudio:
pre_sandbox_hook = base::BindOnce(&audio::AudioPreSandboxHook);
break;
case sandbox::mojom::Sandbox::kSpeechRecognition:
#if !defined(TOOLKIT_QT)
pre_sandbox_hook =
base::BindOnce(&speech::SpeechRecognitionPreSandboxHook);
#endif
break;
case sandbox::mojom::Sandbox::kScreenAI:
#if !defined(TOOLKIT_QT)
pre_sandbox_hook = base::BindOnce(&screen_ai::ScreenAIPreSandboxHook);
#endif
break;
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
case sandbox::mojom::Sandbox::kHardwareVideoDecoding:
pre_sandbox_hook =
base::BindOnce(&media::HardwareVideoDecodingPreSandboxHook);
break;
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
#if BUILDFLAG(IS_CHROMEOS_ASH)
case sandbox::mojom::Sandbox::kIme:
pre_sandbox_hook = base::BindOnce(&ash::ime::ImePreSandboxHook);
break;
case sandbox::mojom::Sandbox::kTts:
pre_sandbox_hook = base::BindOnce(&chromeos::tts::TtsPreSandboxHook);
break;
#if BUILDFLAG(ENABLE_CROS_LIBASSISTANT)
case sandbox::mojom::Sandbox::kLibassistant:
pre_sandbox_hook =
base::BindOnce(&chromeos::libassistant::LibassistantPreSandboxHook);
break;
#endif // BUILDFLAG(ENABLE_CROS_LIBASSISTANT)
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
default:
break;
}
if (!sandbox::policy::IsUnsandboxedSandboxType(sandbox_type) &&
(parameters.zygote_child || !pre_sandbox_hook.is_null())) {
sandbox::policy::SandboxLinux::Options sandbox_options;
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
if (sandbox_type == sandbox::mojom::Sandbox::kHardwareVideoDecoding) {
// The kHardwareVideoDecoding sandbox needs to know the GPU type in order
// to select the right policy.
gpu::GPUInfo gpu_info{};
gpu::CollectBasicGraphicsInfo(&gpu_info);
sandbox_options.use_amd_specific_policies =
angle::IsAMD(gpu_info.active_gpu().vendor_id);
}
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_ASH)
sandbox::policy::Sandbox::Initialize(
sandbox_type, std::move(pre_sandbox_hook), sandbox_options);
}
#elif BUILDFLAG(IS_WIN)
g_utility_target_services = parameters.sandbox_info->target_services;
#endif
ChildProcess utility_process(GetIOThreadPriority(utility_sub_type));
GetContentClient()->utility()->PostIOThreadCreated(
utility_process.io_task_runner());
base::RunLoop run_loop;
utility_process.set_main_thread(
new UtilityThreadImpl(run_loop.QuitClosure()));
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_MAC)
// Startup tracing is usually enabled earlier, but if we forked from a zygote,
// we can only enable it after mojo IPC support is brought up initialized by
// UtilityThreadImpl, because the mojo broker has to create the tracing SMB on
// our behalf due to the zygote sandbox.
if (parameters.zygote_child)
tracing::EnableStartupTracingIfNeeded();
#endif // BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_MAC)
// Both utility process and service utility process would come
// here, but the later is launched without connection to service manager, so
// there has no base::PowerMonitor be created(See ChildThreadImpl::Init()).
// As base::PowerMonitor is necessary to base::HighResolutionTimerManager, for
// such case we just disable base::HighResolutionTimerManager for now.
// Note that disabling base::HighResolutionTimerManager means high resolution
// timer is always disabled no matter on battery or not, but it should have
// no any bad influence because currently service utility process is not using
// any high resolution timer.
// TODO(leonhsl): Once http://crbug.com/646833 got resolved, re-enable
// base::HighResolutionTimerManager here for future possible usage of high
// resolution timer in service utility process.
absl::optional<base::HighResolutionTimerManager> hi_res_timer_manager;
if (base::PowerMonitor::IsInitialized()) {
hi_res_timer_manager.emplace();
}
#if BUILDFLAG(IS_WIN)
auto sandbox_type =
sandbox::policy::SandboxTypeFromCommandLine(*parameters.command_line);
DVLOG(1) << "Sandbox type: " << static_cast<int>(sandbox_type);
// https://crbug.com/1076771 https://crbug.com/1075487 Premature unload of
// shell32 caused process to crash during process shutdown. See also a
// separate fix for https://crbug.com/1139752. Fixed in Windows 11.
if (base::win::GetVersion() < base::win::Version::WIN11) {
HMODULE shell32_pin = ::LoadLibrary(L"shell32.dll");
UNREFERENCED_PARAMETER(shell32_pin);
}
if (!sandbox::policy::IsUnsandboxedSandboxType(sandbox_type) &&
sandbox_type != sandbox::mojom::Sandbox::kCdm &&
sandbox_type != sandbox::mojom::Sandbox::kMediaFoundationCdm &&
sandbox_type != sandbox::mojom::Sandbox::kWindowsSystemProxyResolver) {
if (!g_utility_target_services)
return false;
char buffer;
// Ensure RtlGenRandom is warm before the token is lowered; otherwise,
// base::RandBytes() will CHECK fail when v8 is initialized.
base::RandBytes(&buffer, sizeof(buffer));
g_utility_target_services->LowerToken();
}
#endif
internal::PartitionAllocSupport::Get()->ReconfigureAfterTaskRunnerInit(
switches::kUtilityProcess);
run_loop.Run();
#if defined(LEAK_SANITIZER)
// Invoke LeakSanitizer before shutting down the utility thread, to avoid
// reporting shutdown-only leaks.
__lsan_do_leak_check();
#endif
return 0;
}
} // namespace content
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