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chrome_main_delegate.cc
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chrome_main_delegate.cc
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// 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 "chrome/app/chrome_main_delegate.h"
#include <stddef.h>
#include <string>
#include "base/base_paths.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/cpu.h"
#include "base/cxx17_backports.h"
#include "base/dcheck_is_on.h"
#include "base/files/file_path.h"
#include "base/i18n/rtl.h"
#include "base/lazy_instance.h"
#include "base/path_service.h"
#include "base/process/memory.h"
#include "base/process/process.h"
#include "base/process/process_handle.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/sequence_manager/thread_controller_power_monitor.h"
#include "base/threading/hang_watcher.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event_impl.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "chrome/browser/chrome_content_browser_client.h"
#include "chrome/browser/chrome_resource_bundle_helper.h"
#include "chrome/browser/defaults.h"
#include "chrome/browser/metrics/chrome_feature_list_creator.h"
#include "chrome/browser/startup_data.h"
#include "chrome/common/buildflags.h"
#include "chrome/common/channel_info.h"
#include "chrome/common/chrome_content_client.h"
#include "chrome/common/chrome_features.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/chrome_paths_internal.h"
#include "chrome/common/chrome_result_codes.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/crash_keys.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/url_constants.h"
#include "chrome/gpu/chrome_content_gpu_client.h"
#include "chrome/renderer/chrome_content_renderer_client.h"
#include "chrome/utility/chrome_content_utility_client.h"
#include "components/component_updater/component_updater_paths.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "components/crash/core/app/crash_reporter_client.h"
#include "components/crash/core/common/crash_key.h"
#include "components/crash/core/common/crash_keys.h"
#include "components/gwp_asan/buildflags/buildflags.h"
#include "components/heap_profiling/in_process/heap_profiler_controller.h"
#include "components/nacl/common/buildflags.h"
#include "components/services/heap_profiling/public/cpp/profiling_client.h"
#include "components/startup_metric_utils/browser/startup_metric_utils.h"
#include "components/version_info/version_info.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_paths.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/profiling.h"
#include "content/public/common/url_constants.h"
#include "extensions/common/constants.h"
#include "net/http/http_cache.h"
#include "net/url_request/url_request.h"
#include "pdf/buildflags.h"
#include "ppapi/buildflags/buildflags.h"
#include "printing/buildflags/buildflags.h"
#include "services/tracing/public/cpp/stack_sampling/tracing_sampler_profiler.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/ui_base_switches.h"
#if defined(OS_WIN)
#include <malloc.h>
#include <algorithm>
#include "base/debug/close_handle_hook_win.h"
#include "base/files/important_file_writer_cleaner.h"
#include "base/win/atl.h"
#include "chrome/child/v8_crashpad_support_win.h"
#include "chrome/chrome_elf/chrome_elf_main.h"
#include "chrome/common/child_process_logging.h"
#include "chrome/install_static/install_util.h"
#include "components/browser_watcher/extended_crash_reporting.h"
#include "sandbox/win/src/sandbox.h"
#include "ui/base/resource/resource_bundle_win.h"
#endif
#if defined(OS_MAC)
#include "base/mac/foundation_util.h"
#include "chrome/app/chrome_main_mac.h"
#include "chrome/browser/chrome_browser_application_mac.h"
#include "chrome/browser/mac/relauncher.h"
#include "chrome/browser/shell_integration.h"
#include "components/crash/core/common/objc_zombie.h"
#include "ui/base/l10n/l10n_util_mac.h"
#endif
#if defined(OS_POSIX)
#include <locale.h>
#include <signal.h>
#include "chrome/app/chrome_crash_reporter_client.h"
#include "chrome/app/shutdown_signal_handlers_posix.h"
#endif
#if BUILDFLAG(ENABLE_NACL) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
#include "components/nacl/common/nacl_paths.h"
#include "components/nacl/zygote/nacl_fork_delegate_linux.h"
#endif
#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "ash/constants/ash_paths.h"
#include "ash/constants/ash_switches.h"
#include "base/system/sys_info.h"
#include "chrome/browser/ash/dbus/dbus_helper.h"
#include "chrome/browser/chromeos/boot_times_recorder.h"
#include "chrome/browser/chromeos/startup_settings_cache.h"
#include "chromeos/dbus/constants/dbus_paths.h"
#include "chromeos/hugepage_text/hugepage_text.h"
#include "chromeos/memory/kstaled.h"
#include "chromeos/memory/memory.h"
#include "chromeos/memory/swap_configuration.h"
#endif
#if defined(OS_ANDROID)
#include "base/android/java_exception_reporter.h"
#include "base/android/library_loader/library_loader_hooks.h"
#include "chrome/browser/android/crash/pure_java_exception_handler.h"
#include "chrome/browser/android/metrics/uma_session_stats.h"
#include "chrome/browser/flags/android/chrome_feature_list.h"
#include "chrome/common/chrome_descriptors.h"
#include "components/power_scheduler/power_scheduler.h"
#include "net/android/network_change_notifier_factory_android.h"
#else // defined(OS_ANDROID)
// Diagnostics is only available on non-android platforms.
#include "chrome/browser/diagnostics/diagnostics_controller.h"
#include "chrome/browser/diagnostics/diagnostics_writer.h"
#endif
#if defined(OS_POSIX) && !defined(OS_MAC) && !defined(OS_ANDROID)
#include "components/crash/core/app/breakpad_linux.h"
#include "v8/include/v8-wasm-trap-handler-posix.h"
#include "v8/include/v8.h"
#endif
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
#include "base/environment.h"
#endif
#if defined(OS_MAC) || defined(OS_WIN) || defined(OS_ANDROID) || \
defined(OS_LINUX) || defined(OS_CHROMEOS)
#include "chrome/browser/policy/policy_path_parser.h"
#include "components/crash/core/app/crashpad.h"
#endif
#if BUILDFLAG(ENABLE_NACL)
#include "components/nacl/common/nacl_switches.h"
#include "components/nacl/renderer/plugin/ppapi_entrypoints.h"
#endif
#if BUILDFLAG(ENABLE_PLUGINS)
#include "pdf/pdf_ppapi.h"
#endif
#if BUILDFLAG(ENABLE_PDF)
#include "chrome/child/pdf_child_init.h"
#endif
#if BUILDFLAG(ENABLE_GWP_ASAN)
#include "components/gwp_asan/client/gwp_asan.h" // nogncheck
#endif
#if BUILDFLAG(IS_CHROMEOS_LACROS)
#include "chrome/browser/lacros/lacros_chrome_service_delegate_impl.h"
#include "chromeos/lacros/lacros_chrome_service_impl.h"
#endif
base::LazyInstance<ChromeContentGpuClient>::DestructorAtExit
g_chrome_content_gpu_client = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<ChromeContentRendererClient>::DestructorAtExit
g_chrome_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<ChromeContentUtilityClient>::DestructorAtExit
g_chrome_content_utility_client = LAZY_INSTANCE_INITIALIZER;
extern int NaClMain(const content::MainFunctionParams&);
#if !defined(OS_CHROMEOS)
extern int CloudPrintServiceProcessMain(const content::MainFunctionParams&);
#endif
const char* const ChromeMainDelegate::kNonWildcardDomainNonPortSchemes[] = {
extensions::kExtensionScheme, chrome::kChromeSearchScheme,
content::kChromeDevToolsScheme, content::kChromeUIScheme,
content::kChromeUIUntrustedScheme};
const size_t ChromeMainDelegate::kNonWildcardDomainNonPortSchemesSize =
base::size(kNonWildcardDomainNonPortSchemes);
namespace {
#if defined(OS_WIN)
// Early versions of Chrome incorrectly registered a chromehtml: URL handler,
// which gives us nothing but trouble. Avoid launching chrome this way since
// some apps fail to properly escape arguments.
bool HasDeprecatedArguments(const std::wstring& command_line) {
const wchar_t kChromeHtml[] = L"chromehtml:";
std::wstring command_line_lower = base::ToLowerASCII(command_line);
// We are only searching for ASCII characters so this is OK.
return (command_line_lower.find(kChromeHtml) != std::wstring::npos);
}
// If we try to access a path that is not currently available, we want the call
// to fail rather than show an error dialog.
void SuppressWindowsErrorDialogs() {
UINT new_flags = SEM_FAILCRITICALERRORS |
SEM_NOOPENFILEERRORBOX;
// Preserve existing error mode.
UINT existing_flags = SetErrorMode(new_flags);
SetErrorMode(existing_flags | new_flags);
}
bool IsSandboxedProcess() {
typedef bool (*IsSandboxedProcessFunc)();
IsSandboxedProcessFunc is_sandboxed_process_func =
reinterpret_cast<IsSandboxedProcessFunc>(
GetProcAddress(GetModuleHandle(NULL), "IsSandboxedProcess"));
return is_sandboxed_process_func && is_sandboxed_process_func();
}
void SetUpExtendedCrashReporting(bool is_browser_process) {
browser_watcher::ExtendedCrashReporting* extended_crash_reporting =
browser_watcher::ExtendedCrashReporting::SetUpIfEnabled(
is_browser_process
? browser_watcher::ExtendedCrashReporting::kBrowserProcess
: browser_watcher::ExtendedCrashReporting::kOther);
if (!extended_crash_reporting)
return;
// Record product, version, channel and special build strings.
wchar_t exe_file[MAX_PATH] = {};
CHECK(::GetModuleFileName(nullptr, exe_file, base::size(exe_file)));
std::wstring product_name, version_number, channel_name, special_build;
install_static::GetExecutableVersionDetails(
exe_file, &product_name, &version_number, &special_build, &channel_name);
extended_crash_reporting->SetProductStrings(
base::WideToUTF16(product_name), base::WideToUTF16(version_number),
base::WideToUTF16(channel_name), base::WideToUTF16(special_build));
}
#endif // defined(OS_WIN)
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
void AdjustLinuxOOMScore(const std::string& process_type) {
int score = -1;
if (process_type == switches::kPpapiPluginProcess) {
score = content::kPluginOomScore;
} else if (process_type == switches::kUtilityProcess ||
process_type == switches::kGpuProcess ||
process_type == switches::kCloudPrintServiceProcess) {
score = content::kMiscOomScore;
#if BUILDFLAG(ENABLE_NACL)
} else if (process_type == switches::kNaClLoaderProcess ||
process_type == switches::kNaClLoaderNonSfiProcess) {
score = content::kPluginOomScore;
#endif
} else if (process_type == switches::kZygoteProcess || process_type.empty()) {
// For zygotes and unlabeled process types, we want to still make
// them killable by the OOM killer.
score = content::kZygoteOomScore;
} else if (process_type == switches::kRendererProcess) {
LOG(WARNING) << "process type 'renderer' "
<< "should be created through the zygote.";
// When debugging, this process type can end up being run directly, but
// this isn't the typical path for assigning the OOM score for it. Still,
// we want to assign a score that is somewhat representative for debugging.
score = content::kLowestRendererOomScore;
} else {
NOTREACHED() << "Unknown process type";
}
// In the case of a 0 score, still try to adjust it. Most likely the score is
// 0 already, but it may not be if this process inherited a higher score from
// its parent process.
if (score > -1)
base::AdjustOOMScore(base::GetCurrentProcId(), score);
}
#endif // defined(OS_LINUX) || defined(OS_CHROMEOS)
// Returns true if this subprocess type needs the ResourceBundle initialized
// and resources loaded.
bool SubprocessNeedsResourceBundle(const std::string& process_type) {
return
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// The zygote process opens the resources for the renderers.
process_type == switches::kZygoteProcess ||
#endif
#if defined(OS_MAC)
// Mac needs them too for scrollbar related images and for sandbox
// profiles.
#if BUILDFLAG(ENABLE_NACL)
process_type == switches::kNaClLoaderProcess ||
#endif
process_type == switches::kGpuProcess ||
#endif
process_type == switches::kPpapiPluginProcess ||
process_type == switches::kRendererProcess ||
process_type == switches::kUtilityProcess;
}
#if defined(OS_POSIX)
// Check for --version and --product-version; return true if we encountered
// one of these switches and should exit now.
bool HandleVersionSwitches(const base::CommandLine& command_line) {
#if !defined(OS_MAC)
if (command_line.HasSwitch(switches::kProductVersion)) {
printf("%s\n", version_info::GetVersionNumber().c_str());
return true;
}
#endif
if (command_line.HasSwitch(switches::kVersion)) {
printf("%s %s %s\n", version_info::GetProductName().c_str(),
version_info::GetVersionNumber().c_str(),
chrome::GetChannelName(chrome::WithExtendedStable(true)).c_str());
return true;
}
return false;
}
// TODO(crbug.com/1052397): Revisit the macro expression once build flag switch
// of lacros-chrome is complete.
#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
// Show the man page if --help or -h is on the command line.
void HandleHelpSwitches(const base::CommandLine& command_line) {
if (command_line.HasSwitch(switches::kHelp) ||
command_line.HasSwitch(switches::kHelpShort)) {
base::FilePath binary(command_line.argv()[0]);
execlp("man", "man", binary.BaseName().value().c_str(), NULL);
PLOG(FATAL) << "execlp failed";
}
}
#endif // defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
#if !defined(OS_MAC) && !defined(OS_ANDROID)
void SIGTERMProfilingShutdown(int signal) {
content::Profiling::Stop();
struct sigaction sigact;
memset(&sigact, 0, sizeof(sigact));
sigact.sa_handler = SIG_DFL;
CHECK_EQ(sigaction(SIGTERM, &sigact, NULL), 0);
raise(signal);
}
void SetUpProfilingShutdownHandler() {
struct sigaction sigact;
sigact.sa_handler = SIGTERMProfilingShutdown;
sigact.sa_flags = SA_RESETHAND;
sigemptyset(&sigact.sa_mask);
CHECK_EQ(sigaction(SIGTERM, &sigact, NULL), 0);
}
#endif // !defined(OS_MAC) && !defined(OS_ANDROID)
#endif // OS_POSIX
struct MainFunction {
const char* name;
int (*function)(const content::MainFunctionParams&);
};
// Initializes the user data dir. Must be called before InitializeLocalState().
void InitializeUserDataDir(base::CommandLine* command_line) {
#if defined(OS_WIN)
// Reach out to chrome_elf for the truth on the user data directory.
// Note that in tests, this links to chrome_elf_test_stubs.
wchar_t user_data_dir_buf[MAX_PATH], invalid_user_data_dir_buf[MAX_PATH];
// In tests this may return false, implying the user data dir should be unset.
if (GetUserDataDirectoryThunk(
user_data_dir_buf, base::size(user_data_dir_buf),
invalid_user_data_dir_buf, base::size(invalid_user_data_dir_buf))) {
base::FilePath user_data_dir(user_data_dir_buf);
if (invalid_user_data_dir_buf[0] != 0) {
chrome::SetInvalidSpecifiedUserDataDir(
base::FilePath(invalid_user_data_dir_buf));
command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
}
CHECK(base::PathService::OverrideAndCreateIfNeeded(
chrome::DIR_USER_DATA, user_data_dir, false, true));
}
#else // OS_WIN
base::FilePath user_data_dir =
command_line->GetSwitchValuePath(switches::kUserDataDir);
std::string process_type =
command_line->GetSwitchValueASCII(switches::kProcessType);
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// On Linux, Chrome does not support running multiple copies under different
// DISPLAYs, so the profile directory can be specified in the environment to
// support the virtual desktop use-case.
if (user_data_dir.empty()) {
std::string user_data_dir_string;
std::unique_ptr<base::Environment> environment(base::Environment::Create());
if (environment->GetVar("CHROME_USER_DATA_DIR", &user_data_dir_string) &&
base::IsStringUTF8(user_data_dir_string)) {
user_data_dir = base::FilePath::FromUTF8Unsafe(user_data_dir_string);
}
}
#endif // defined(OS_LINUX) || defined(OS_CHROMEOS)
#if defined(OS_MAC)
policy::path_parser::CheckUserDataDirPolicy(&user_data_dir);
#endif // OS_MAC
const bool specified_directory_was_invalid =
!user_data_dir.empty() &&
!base::PathService::OverrideAndCreateIfNeeded(chrome::DIR_USER_DATA,
user_data_dir, false, true);
// Save inaccessible or invalid paths so the user may be prompted later.
if (specified_directory_was_invalid)
chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
// Warn and fail early if the process fails to get a user data directory.
if (!base::PathService::Get(chrome::DIR_USER_DATA, &user_data_dir)) {
// If an invalid command-line or policy override was specified, the user
// will be given an error with that value. Otherwise, use the directory
// returned by PathService (or the fallback default directory) in the error.
if (!specified_directory_was_invalid) {
// base::PathService::Get() returns false and yields an empty path if it
// fails to create DIR_USER_DATA. Retrieve the default value manually to
// display a more meaningful error to the user in that case.
if (user_data_dir.empty())
chrome::GetDefaultUserDataDirectory(&user_data_dir);
chrome::SetInvalidSpecifiedUserDataDir(user_data_dir);
}
// The browser process (which is identified by an empty |process_type|) will
// handle the error later; other processes that need the dir crash here.
CHECK(process_type.empty()) << "Unable to get the user data directory "
<< "for process type: " << process_type;
}
// Append the fallback user data directory to the commandline. Otherwise,
// child or service processes will attempt to use the invalid directory.
if (specified_directory_was_invalid)
command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
#endif // OS_WIN
}
#if !defined(OS_ANDROID)
void InitLogging(const std::string& process_type) {
logging::OldFileDeletionState file_state =
logging::APPEND_TO_OLD_LOG_FILE;
if (process_type.empty()) {
file_state = logging::DELETE_OLD_LOG_FILE;
}
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
logging::InitChromeLogging(command_line, file_state);
}
#endif
void RecordMainStartupMetrics(base::TimeTicks application_start_time) {
const base::TimeTicks now = base::TimeTicks::Now();
#if defined(OS_WIN)
DCHECK(!application_start_time.is_null());
startup_metric_utils::RecordApplicationStartTime(application_start_time);
#elif defined(OS_ANDROID)
// On Android the main entry point time is the time when the Java code starts.
// This happens before the shared library containing this code is even loaded.
// The Java startup code has recorded that time, but the C++ code can't fetch
// it from the Java side until it has initialized the JNI. See
// ChromeMainDelegateAndroid.
#else
// On other platforms, |application_start_time| == |now| since the application
// starts with ChromeMain().
startup_metric_utils::RecordApplicationStartTime(now);
#endif
#if defined(OS_MAC) || defined(OS_WIN) || defined(OS_LINUX) || \
defined(OS_CHROMEOS)
// Record the startup process creation time on supported platforms. On Android
// this is recorded in ChromeMainDelegateAndroid.
startup_metric_utils::RecordStartupProcessCreationTime(
base::Process::Current().CreationTime());
#endif
startup_metric_utils::RecordChromeMainEntryTime(now);
}
} // namespace
ChromeMainDelegate::ChromeMainDelegate()
: ChromeMainDelegate(base::TimeTicks()) {}
ChromeMainDelegate::ChromeMainDelegate(base::TimeTicks exe_entry_point_ticks) {
// Record startup metrics in the browser process. For component builds, there
// is no way to know the type of process (process command line is not yet
// initialized), so the function below will also be called in renderers.
// This doesn't matter as it simply sets global variables.
RecordMainStartupMetrics(exe_entry_point_ticks);
}
ChromeMainDelegate::~ChromeMainDelegate() {
}
void ChromeMainDelegate::PostEarlyInitialization(bool is_running_tests) {
#if defined(OS_WIN)
// Initialize the cleaner of left-behind tmp files now that the main thread
// has its SequencedTaskRunner; see https://crbug.com/1075917.
base::ImportantFileWriterCleaner::GetInstance().Initialize();
#endif
// Chrome disallows cookies by default. All code paths that want to use
// cookies need to go through one of Chrome's URLRequestContexts which have
// a ChromeNetworkDelegate attached that selectively allows cookies again.
net::URLRequest::SetDefaultCookiePolicyToBlock();
// On Chrome OS, IPC (D-Bus, Crosapi) is required to create the FeatureList,
// which depends on policy from an OS service. So, initialize it at this
// timing.
#if BUILDFLAG(IS_CHROMEOS_ASH)
// The feature list depends on BrowserPolicyConnectorChromeOS which depends
// on DBus, so initialize it here. Some D-Bus clients may depend on feature
// list, so initialize them separately later at the end of this function.
chromeos::InitializeDBus();
#endif
#if BUILDFLAG(IS_CHROMEOS_LACROS)
// LacrosChromeServiceImpl instance needs the sequence of the main thread,
// and needs to be created earlier than incoming Mojo invitation handling.
// This also needs ThreadPool sequences to post some tasks internally.
// However, the tasks can be suspended until actual start of the ThreadPool
// sequences later.
lacros_chrome_service_ = std::make_unique<chromeos::LacrosChromeServiceImpl>(
std::make_unique<LacrosChromeServiceDelegateImpl>());
#endif
ChromeFeatureListCreator* chrome_feature_list_creator =
chrome_content_browser_client_->startup_data()
->chrome_feature_list_creator();
chrome_feature_list_creator->CreateFeatureList();
PostFieldTrialInitialization();
// Initializes the resource bundle and determines the locale.
std::string actual_locale =
LoadLocalState(chrome_feature_list_creator, is_running_tests);
chrome_feature_list_creator->SetApplicationLocale(actual_locale);
chrome_feature_list_creator->OverrideCachedUIStrings();
#if BUILDFLAG(IS_CHROMEOS_ASH)
// Initialize D-Bus clients that depend on feature list.
chromeos::InitializeFeatureListDependentDBus();
#endif
#if defined(OS_ANDROID)
chrome_content_browser_client_->startup_data()->CreateProfilePrefService();
net::NetworkChangeNotifier::SetFactory(
new net::NetworkChangeNotifierFactoryAndroid());
#endif
if (base::FeatureList::IsEnabled(
features::kWriteBasicSystemProfileToPersistentHistogramsFile)) {
bool record = true;
#if defined(OS_ANDROID)
record =
base::FeatureList::IsEnabled(chrome::android::kUmaBackgroundSessions);
#endif
if (record)
chrome_content_browser_client_->startup_data()->RecordCoreSystemProfile();
}
#if defined(OS_ANDROID)
UmaSessionStats::OnStartup();
#endif
#if defined(OS_MAC)
chrome::CacheChannelInfo();
#endif
}
bool ChromeMainDelegate::ShouldCreateFeatureList() {
// Chrome creates the FeatureList, so content should not.
return false;
}
void ChromeMainDelegate::PostFieldTrialInitialization() {
std::string process_type =
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kProcessType);
bool is_browser_process = process_type.empty();
// Enable Split cache by default here and not in content/ so as to not
// impact non-Chrome embedders like WebView, Cronet etc. This only enables
// it if not already overridden by command line, field trial etc.
net::HttpCache::SplitCacheFeatureEnableByDefault();
#if defined(OS_ANDROID)
// For child processes, this requires allowlisting of the sched_setaffinity()
// syscall in the sandbox (baseline_policy_android.cc). When this call is
// removed, the sandbox allowlist should be updated too.
if (base::FeatureList::IsEnabled(
features::kCpuAffinityRestrictToLittleCores)) {
power_scheduler::PowerScheduler::GetInstance()->SetPolicy(
power_scheduler::SchedulingPolicy::kLittleCoresOnly);
} else if (base::FeatureList::IsEnabled(
features::kPowerSchedulerThrottleIdleAndNopAnimation)) {
power_scheduler::PowerScheduler::GetInstance()->SetPolicy(
power_scheduler::SchedulingPolicy::kThrottleIdleAndNopAnimation);
} else if (base::FeatureList::IsEnabled(
features::kPowerSchedulerThrottleIdle)) {
power_scheduler::PowerScheduler::GetInstance()->SetPolicy(
power_scheduler::SchedulingPolicy::kThrottleIdle);
}
#endif
#if BUILDFLAG(IS_CHROMEOS_ASH) || BUILDFLAG(IS_CHROMEOS_LACROS)
// Threading features.
base::PlatformThread::InitThreadPostFieldTrial();
#endif
#if BUILDFLAG(ENABLE_GWP_ASAN_MALLOC)
{
version_info::Channel channel = chrome::GetChannel();
bool is_canary_dev = (channel == version_info::Channel::CANARY ||
channel == version_info::Channel::DEV);
gwp_asan::EnableForMalloc(is_canary_dev || is_browser_process,
process_type.c_str());
}
#endif
#if BUILDFLAG(ENABLE_GWP_ASAN_PARTITIONALLOC)
{
version_info::Channel channel = chrome::GetChannel();
bool is_canary_dev = (channel == version_info::Channel::CANARY ||
channel == version_info::Channel::DEV);
gwp_asan::EnableForPartitionAlloc(is_canary_dev || is_browser_process,
process_type.c_str());
}
#endif
// Start heap profiling as early as possible so it can start recording
// memory allocations.
if (is_browser_process) {
heap_profiler_controller_ = std::make_unique<HeapProfilerController>();
heap_profiler_controller_->Start();
#if BUILDFLAG(IS_CHROMEOS_ASH)
chromeos::ConfigureSwap();
chromeos::InitializeKstaled();
// If we're in an experimental group that locks the browser text we will do
// that now.
chromeos::LockMainProgramText();
#endif
}
#if defined(OS_WIN)
SetUpExtendedCrashReporting(is_browser_process);
base::sequence_manager::internal::ThreadControllerPowerMonitor::
InitializeOnMainThread();
#endif
base::HangWatcher::InitializeOnMainThread();
}
#if defined(OS_WIN)
bool ChromeMainDelegate::ShouldHandleConsoleControlEvents() {
// Handle console control events so that orderly shutdown can be performed by
// ChromeContentBrowserClient's override of SessionEnding.
return true;
}
#endif
bool ChromeMainDelegate::BasicStartupComplete(int* exit_code) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
chromeos::BootTimesRecorder::Get()->SaveChromeMainStats();
#endif
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
// Only allow disabling web security via the command-line flag if the user has
// specified a distinct profile directory. This still enables tests to disable
// web security by setting the kWebKitWebSecurityEnabled pref directly.
//
// Note that this is done in ChromeMainDelegate::BasicStartupComplete()
// because this is the earliest callback. Many places in Chromium gate
// security features around kDisableWebSecurity, and it is unreasonable to
// expect them all to properly also check for kUserDataDir.
if (command_line.HasSwitch(switches::kDisableWebSecurity)) {
base::FilePath default_user_data_dir;
chrome::GetDefaultUserDataDirectory(&default_user_data_dir);
const base::FilePath specified_user_data_dir =
command_line.GetSwitchValuePath(switches::kUserDataDir)
.StripTrailingSeparators();
if (specified_user_data_dir.empty() ||
specified_user_data_dir == default_user_data_dir) {
LOG(ERROR) << "Web security may only be disabled if '--user-data-dir' is "
"also specified with a non-default value.";
base::CommandLine::ForCurrentProcess()->RemoveSwitch(
switches::kDisableWebSecurity);
}
}
#if defined(OS_WIN)
// Browser should not be sandboxed.
const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
if (is_browser && IsSandboxedProcess()) {
*exit_code = chrome::RESULT_CODE_INVALID_SANDBOX_STATE;
return true;
}
#endif
#if defined(OS_MAC)
// Give the browser process a longer treadmill, since crashes
// there have more impact.
const bool is_browser = !command_line.HasSwitch(switches::kProcessType);
ObjcEvilDoers::ZombieEnable(true, is_browser ? 10000 : 1000);
#endif
content::Profiling::ProcessStarted();
// Setup tracing sampler profiler as early as possible at startup if needed.
tracing_sampler_profiler_ =
tracing::TracingSamplerProfiler::CreateOnMainThread();
#if defined(OS_WIN)
v8_crashpad_support::SetUp();
#endif
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
if (!crash_reporter::IsCrashpadEnabled()) {
breakpad::SetFirstChanceExceptionHandler(v8::TryHandleWebAssemblyTrapPosix);
}
#endif
#if defined(OS_POSIX)
if (HandleVersionSwitches(command_line)) {
*exit_code = 0;
return true; // Got a --version switch; exit with a success error code.
}
// TODO(crbug.com/1052397): Revisit the macro expression once build flag switch
// of lacros-chrome is complete.
#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
// This will directly exit if the user asked for help.
HandleHelpSwitches(command_line);
#endif
#endif // OS_POSIX
#if defined(OS_WIN)
// Must do this before any other usage of command line!
if (HasDeprecatedArguments(command_line.GetCommandLineString())) {
*exit_code = 1;
return true;
}
// HandleVerifier detects and reports incorrect handle manipulations. It tracks
// handle operations on builds that support DCHECK only.
// TODO(crbug/1104358): Support 64-bit handle hooks.
#if DCHECK_IS_ON() && !defined(ARCH_CPU_64_BITS)
base::debug::InstallHandleHooks();
#else
base::win::DisableHandleVerifier();
#endif
#endif // defined(OS_WIN)
chrome::RegisterPathProvider();
#if BUILDFLAG(IS_CHROMEOS_ASH)
chromeos::RegisterPathProvider();
chromeos::dbus_paths::RegisterPathProvider();
#endif
#if BUILDFLAG(ENABLE_NACL) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
nacl::RegisterPathProvider();
#endif
ContentSettingsPattern::SetNonWildcardDomainNonPortSchemes(
kNonWildcardDomainNonPortSchemes, kNonWildcardDomainNonPortSchemesSize);
// No support for ANDROID yet as DiagnosticsController needs wchar support.
// TODO(gspencer): That's not true anymore, or at least there are no w-string
// references anymore. Not sure if that means this can be enabled on Android or
// not though. As there is no easily accessible command line on Android, I'm
// not sure this is a big deal.
#if !defined(OS_ANDROID)
// If we are in diagnostics mode this is the end of the line: after the
// diagnostics are run the process will invariably exit.
if (command_line.HasSwitch(switches::kDiagnostics)) {
diagnostics::DiagnosticsWriter::FormatType format =
diagnostics::DiagnosticsWriter::HUMAN;
if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
std::string format_str =
command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
if (format_str == "machine") {
format = diagnostics::DiagnosticsWriter::MACHINE;
} else if (format_str == "log") {
format = diagnostics::DiagnosticsWriter::LOG;
} else {
DCHECK_EQ("human", format_str);
}
}
diagnostics::DiagnosticsWriter writer(format);
*exit_code = diagnostics::DiagnosticsController::GetInstance()->Run(
command_line, &writer);
diagnostics::DiagnosticsController::GetInstance()->ClearResults();
return true;
}
#endif
#if BUILDFLAG(IS_CHROMEOS_ASH)
// Initialize primary user homedir (in multi-profile session) as it may be
// passed as a command line switch.
base::FilePath homedir;
if (command_line.HasSwitch(chromeos::switches::kHomedir)) {
homedir = base::FilePath(
command_line.GetSwitchValueASCII(chromeos::switches::kHomedir));
base::PathService::OverrideAndCreateIfNeeded(base::DIR_HOME, homedir, true,
false);
}
// If we are recovering from a crash on a ChromeOS device, then we will do
// some recovery using the diagnostics module, and then continue on. We fake
// up a command line to tell it that we want it to recover, and to preserve
// the original command line. Note: logging at this point is to /var/log/ui.
if ((base::SysInfo::IsRunningOnChromeOS() &&
command_line.HasSwitch(chromeos::switches::kLoginUser)) ||
command_line.HasSwitch(switches::kDiagnosticsRecovery)) {
base::CommandLine interim_command_line(command_line.GetProgram());
const char* const kSwitchNames[] = {switches::kUserDataDir, };
interim_command_line.CopySwitchesFrom(command_line, kSwitchNames,
base::size(kSwitchNames));
interim_command_line.AppendSwitch(switches::kDiagnostics);
interim_command_line.AppendSwitch(switches::kDiagnosticsRecovery);
diagnostics::DiagnosticsWriter::FormatType format =
diagnostics::DiagnosticsWriter::LOG;
if (command_line.HasSwitch(switches::kDiagnosticsFormat)) {
std::string format_str =
command_line.GetSwitchValueASCII(switches::kDiagnosticsFormat);
if (format_str == "machine") {
format = diagnostics::DiagnosticsWriter::MACHINE;
} else if (format_str == "human") {
format = diagnostics::DiagnosticsWriter::HUMAN;
} else {
DCHECK_EQ("log", format_str);
}
}
diagnostics::DiagnosticsWriter writer(format);
int diagnostics_exit_code =
diagnostics::DiagnosticsController::GetInstance()->Run(command_line,
&writer);
if (diagnostics_exit_code) {
// Diagnostics has failed somehow, so we exit.
*exit_code = diagnostics_exit_code;
return true;
}
// Now we run the actual recovery tasks.
int recovery_exit_code =
diagnostics::DiagnosticsController::GetInstance()->RunRecovery(
command_line, &writer);
if (recovery_exit_code) {
// Recovery has failed somehow, so we exit.
*exit_code = recovery_exit_code;
return true;
}
} else { // Not running diagnostics or recovery.
diagnostics::DiagnosticsController::GetInstance()->RecordRegularStartup();
}
#endif
// The TLS slot used by the memlog allocator shim needs to be initialized
// early to ensure that it gets assigned a low slot number. If it gets
// initialized too late, the glibc TLS system will require a malloc call in
// order to allocate storage for a higher slot number. Since malloc is hooked,
// this causes re-entrancy into the allocator shim, while the TLS object is
// partially-initialized, which the TLS object is supposed to protect again.
heap_profiling::InitTLSSlot();
return false;
}
#if defined(OS_MAC)
void ChromeMainDelegate::InitMacCrashReporter(
const base::CommandLine& command_line,
const std::string& process_type) {
// TODO(mark): Right now, InitializeCrashpad() needs to be called after
// CommandLine::Init() and chrome::RegisterPathProvider(). Ideally, Crashpad
// initialization could occur sooner, preferably even before the framework
// dylib is even loaded, to catch potential early crashes.
const bool browser_process = process_type.empty();
const bool install_from_dmg_relauncher_process =
process_type == switches::kRelauncherProcess &&
command_line.HasSwitch(switches::kRelauncherProcessDMGDevice);
const bool initial_client =
browser_process || install_from_dmg_relauncher_process;
crash_reporter::InitializeCrashpad(initial_client, process_type);
if (!browser_process) {
std::string metrics_client_id =
command_line.GetSwitchValueASCII(switches::kMetricsClientID);
crash_keys::SetMetricsClientIdFromGUID(metrics_client_id);
}
// Mac Chrome is packaged with a main app bundle and a helper app bundle.
// The main app bundle should only be used for the browser process, so it
// should never see a --type switch (switches::kProcessType). Likewise,
// the helper should always have a --type switch.
//
// This check is done this late so there is already a call to
// base::mac::IsBackgroundOnlyProcess(), so there is no change in
// startup/initialization order.
// The helper's Info.plist marks it as a background only app.
if (base::mac::IsBackgroundOnlyProcess()) {
CHECK(command_line.HasSwitch(switches::kProcessType) &&
!process_type.empty())
<< "Helper application requires --type.";
} else if (base::mac::AmIBundled()) {
CHECK(!command_line.HasSwitch(switches::kProcessType) &&
process_type.empty())
<< "Main application forbids --type, saw " << process_type;
}
}
void ChromeMainDelegate::SetUpInstallerPreferences(
const base::CommandLine& command_line) {
const bool uma_setting = command_line.HasSwitch(switches::kEnableUserMetrics);
const bool default_browser_setting =
command_line.HasSwitch(switches::kMakeChromeDefault);
if (uma_setting)
crash_reporter::SetUploadConsent(uma_setting);
if (default_browser_setting)
shell_integration::SetAsDefaultBrowser();
}
#endif // defined(OS_MAC)
void ChromeMainDelegate::PreSandboxStartup() {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line.GetSwitchValueASCII(switches::kProcessType);
crash_reporter::InitializeCrashKeys();
#if defined(OS_POSIX)
ChromeCrashReporterClient::Create();
#endif
#if defined(OS_MAC)
InitMacCrashReporter(command_line, process_type);
SetUpInstallerPreferences(command_line);
#endif
#if defined(OS_WIN)
child_process_logging::Init();
#endif
#if defined(ARCH_CPU_ARM_FAMILY) && \
(defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_CHROMEOS))
// Create an instance of the CPU class to parse /proc/cpuinfo and cache
// cpu_brand info.
base::CPU cpu_info;
#endif
// Initialize the user data dir for any process type that needs it.
if (chrome::ProcessNeedsProfileDir(process_type))
InitializeUserDataDir(base::CommandLine::ForCurrentProcess());
// Register component_updater PathProvider after DIR_USER_DATA overidden by
// command line flags. Maybe move the chrome PathProvider down here also?
int alt_preinstalled_components_dir =
#if BUILDFLAG(IS_CHROMEOS_ASH)
chromeos::DIR_PREINSTALLED_COMPONENTS;
#else
chrome::DIR_INTERNAL_PLUGINS;
#endif
component_updater::RegisterPathProvider(chrome::DIR_COMPONENTS,
alt_preinstalled_components_dir,
chrome::DIR_USER_DATA);
#if !defined(OS_ANDROID) && !defined(OS_WIN)
// Android does InitLogging when library is loaded. Skip here.