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electron_main_delegate.cc
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electron_main_delegate.cc
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// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/app/electron_main_delegate.h"
#include <iostream>
#include <memory>
#include <string>
#if defined(OS_LINUX)
#include <glib.h> // for g_setenv()
#endif
#include "base/command_line.h"
#include "base/debug/stack_trace.h"
#include "base/environment.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/mac/bundle_locations.h"
#include "base/path_service.h"
#include "base/strings/string_split.h"
#include "chrome/common/chrome_paths.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "content/public/common/content_switches.h"
#include "electron/buildflags/buildflags.h"
#include "extensions/common/constants.h"
#include "ipc/ipc_buildflags.h"
#include "services/service_manager/embedder/switches.h"
#include "services/service_manager/sandbox/switches.h"
#include "services/tracing/public/cpp/stack_sampling/tracing_sampler_profiler.h"
#include "shell/app/electron_content_client.h"
#include "shell/browser/electron_browser_client.h"
#include "shell/browser/electron_gpu_client.h"
#include "shell/browser/feature_list.h"
#include "shell/browser/relauncher.h"
#include "shell/common/electron_paths.h"
#include "shell/common/options_switches.h"
#include "shell/renderer/electron_renderer_client.h"
#include "shell/renderer/electron_sandboxed_renderer_client.h"
#include "shell/utility/electron_content_utility_client.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/ui_base_switches.h"
#if defined(OS_MACOSX)
#include "shell/app/electron_main_delegate_mac.h"
#endif
#if defined(OS_WIN)
#include "base/win/win_util.h"
#include "chrome/child/v8_crashpad_support_win.h"
#endif
#if defined(OS_LINUX)
#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(MAS_BUILD)
#include "components/crash/core/app/crashpad.h" // nogncheck
#include "components/crash/core/common/crash_key.h"
#include "components/crash/core/common/crash_keys.h"
#include "shell/app/electron_crash_reporter_client.h"
#include "shell/browser/api/electron_api_crash_reporter.h"
#include "shell/common/crash_keys.h"
#endif
namespace electron {
namespace {
const char* kRelauncherProcess = "relauncher";
bool IsBrowserProcess(base::CommandLine* cmd) {
std::string process_type = cmd->GetSwitchValueASCII(::switches::kProcessType);
return process_type.empty();
}
bool IsSandboxEnabled(base::CommandLine* command_line) {
return command_line->HasSwitch(switches::kEnableSandbox) ||
!command_line->HasSwitch(service_manager::switches::kNoSandbox);
}
// 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)
// The zygote process opens the resources for the renderers.
process_type == service_manager::switches::kZygoteProcess ||
#endif
#if defined(OS_MACOSX)
// Mac needs them too for scrollbar related images and for sandbox
// profiles.
process_type == ::switches::kPpapiPluginProcess ||
process_type == ::switches::kPpapiBrokerProcess ||
process_type == ::switches::kGpuProcess ||
#endif
process_type == ::switches::kRendererProcess ||
process_type == ::switches::kUtilityProcess;
}
#if defined(OS_WIN)
void InvalidParameterHandler(const wchar_t*,
const wchar_t*,
const wchar_t*,
unsigned int,
uintptr_t) {
// noop.
}
#endif
} // namespace
// TODO(nornagon): move path provider overriding to its own file in
// shell/common
namespace electron {
bool GetDefaultCrashDumpsPath(base::FilePath* path) {
base::FilePath cur;
if (!base::PathService::Get(DIR_USER_DATA, &cur))
return false;
#if defined(OS_MACOSX) || defined(OS_WIN)
cur = cur.Append(FILE_PATH_LITERAL("Crashpad"));
#else
cur = cur.Append(FILE_PATH_LITERAL("Crash Reports"));
#endif
// TODO(bauerb): http://crbug.com/259796
base::ThreadRestrictions::ScopedAllowIO allow_io;
if (!base::PathExists(cur) && !base::CreateDirectory(cur))
return false;
*path = cur;
return true;
}
bool ElectronPathProvider(int key, base::FilePath* path) {
if (key == DIR_CRASH_DUMPS) {
return GetDefaultCrashDumpsPath(path);
}
return false;
}
void RegisterPathProvider() {
base::PathService::RegisterProvider(ElectronPathProvider, PATH_START,
PATH_END);
}
} // namespace electron
void LoadResourceBundle(const std::string& locale) {
const bool initialized = ui::ResourceBundle::HasSharedInstance();
if (initialized)
ui::ResourceBundle::CleanupSharedInstance();
// Load other resource files.
base::FilePath pak_dir;
#if defined(OS_MACOSX)
pak_dir =
base::mac::FrameworkBundlePath().Append(FILE_PATH_LITERAL("Resources"));
#else
base::PathService::Get(base::DIR_MODULE, &pak_dir);
#endif
ui::ResourceBundle::InitSharedInstanceWithLocale(
locale, nullptr, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
bundle.ReloadLocaleResources(locale);
bundle.AddDataPackFromPath(pak_dir.Append(FILE_PATH_LITERAL("resources.pak")),
ui::SCALE_FACTOR_NONE);
}
ElectronMainDelegate::ElectronMainDelegate() = default;
ElectronMainDelegate::~ElectronMainDelegate() = default;
const char* const ElectronMainDelegate::kNonWildcardDomainNonPortSchemes[] = {
extensions::kExtensionScheme};
const size_t ElectronMainDelegate::kNonWildcardDomainNonPortSchemesSize =
base::size(kNonWildcardDomainNonPortSchemes);
bool ElectronMainDelegate::BasicStartupComplete(int* exit_code) {
auto* command_line = base::CommandLine::ForCurrentProcess();
logging::LoggingSettings settings;
#if defined(OS_WIN)
v8_crashpad_support::SetUp();
// On Windows the terminal returns immediately, so we add a new line to
// prevent output in the same line as the prompt.
if (IsBrowserProcess(command_line))
std::wcout << std::endl;
#if defined(DEBUG)
// Print logging to debug.log on Windows
settings.logging_dest = logging::LOG_TO_ALL;
base::FilePath log_filename;
base::PathService::Get(base::DIR_EXE, &log_filename);
log_filename = log_filename.AppendASCII("debug.log");
settings.log_file_path = log_filename.value().c_str();
settings.lock_log = logging::LOCK_LOG_FILE;
settings.delete_old = logging::DELETE_OLD_LOG_FILE;
#else
settings.logging_dest =
logging::LOG_TO_SYSTEM_DEBUG_LOG | logging::LOG_TO_STDERR;
#endif // defined(DEBUG)
#else // defined(OS_WIN)
settings.logging_dest =
logging::LOG_TO_SYSTEM_DEBUG_LOG | logging::LOG_TO_STDERR;
#endif // !defined(OS_WIN)
// Only enable logging when --enable-logging is specified.
auto env = base::Environment::Create();
if (!command_line->HasSwitch(::switches::kEnableLogging) &&
!env->HasVar("ELECTRON_ENABLE_LOGGING")) {
settings.logging_dest = logging::LOG_NONE;
logging::SetMinLogLevel(logging::LOG_NUM_SEVERITIES);
}
logging::InitLogging(settings);
// Logging with pid and timestamp.
logging::SetLogItems(true, false, true, false);
// Enable convient stack printing. This is enabled by default in non-official
// builds.
if (env->HasVar("ELECTRON_ENABLE_STACK_DUMPING"))
base::debug::EnableInProcessStackDumping();
if (env->HasVar("ELECTRON_DISABLE_SANDBOX"))
command_line->AppendSwitch(service_manager::switches::kNoSandbox);
tracing_sampler_profiler_ =
tracing::TracingSamplerProfiler::CreateOnMainThread();
chrome::RegisterPathProvider();
electron::RegisterPathProvider();
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
ContentSettingsPattern::SetNonWildcardDomainNonPortSchemes(
kNonWildcardDomainNonPortSchemes, kNonWildcardDomainNonPortSchemesSize);
#endif
#if defined(OS_MACOSX)
OverrideChildProcessPath();
OverrideFrameworkBundlePath();
SetUpBundleOverrides();
#endif
#if defined(OS_WIN)
// Ignore invalid parameter errors.
_set_invalid_parameter_handler(InvalidParameterHandler);
// Disable the ActiveVerifier, which is used by Chrome to track possible
// bugs, but no use in Electron.
base::win::DisableHandleVerifier();
if (IsBrowserProcess(command_line))
base::win::PinUser32();
#endif
#if defined(OS_LINUX)
// Check for --no-sandbox parameter when running as root.
if (getuid() == 0 && IsSandboxEnabled(command_line))
LOG(FATAL) << "Running as root without --"
<< service_manager::switches::kNoSandbox
<< " is not supported. See https://crbug.com/638180.";
#endif
#if defined(MAS_BUILD)
// In MAS build we are using --disable-remote-core-animation.
//
// According to ccameron:
// If you're running with --disable-remote-core-animation, you may want to
// also run with --disable-gpu-memory-buffer-compositor-resources as well.
// That flag makes it so we use regular GL textures instead of IOSurfaces
// for compositor resources. IOSurfaces are very heavyweight to
// create/destroy, but they can be displayed directly by CoreAnimation (and
// --disable-remote-core-animation makes it so we don't use this property,
// so they're just heavyweight with no upside).
command_line->AppendSwitch(
::switches::kDisableGpuMemoryBufferCompositorResources);
#endif
content_client_ = std::make_unique<ElectronContentClient>();
SetContentClient(content_client_.get());
return false;
}
void ElectronMainDelegate::PostEarlyInitialization(bool is_running_tests) {
std::string custom_locale;
ui::ResourceBundle::InitSharedInstanceWithLocale(
custom_locale, nullptr, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
auto* cmd_line = base::CommandLine::ForCurrentProcess();
if (cmd_line->HasSwitch(::switches::kLang)) {
const std::string locale = cmd_line->GetSwitchValueASCII(::switches::kLang);
const base::FilePath locale_file_path =
ui::ResourceBundle::GetSharedInstance().GetLocaleFilePath(locale);
if (!locale_file_path.empty()) {
custom_locale = locale;
#if defined(OS_LINUX)
/* When built with USE_GLIB, libcc's GetApplicationLocaleInternal() uses
* glib's g_get_language_names(), which keys off of getenv("LC_ALL") */
g_setenv("LC_ALL", custom_locale.c_str(), TRUE);
#endif
}
}
#if defined(OS_MACOSX)
if (custom_locale.empty())
l10n_util::OverrideLocaleWithCocoaLocale();
#endif
LoadResourceBundle(custom_locale);
ElectronBrowserClient::SetApplicationLocale(
l10n_util::GetApplicationLocale(custom_locale));
}
void ElectronMainDelegate::PreSandboxStartup() {
auto* command_line = base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line->GetSwitchValueASCII(::switches::kProcessType);
#if !defined(MAS_BUILD)
crash_reporter::InitializeCrashKeys();
#endif
// Initialize ResourceBundle which handles files loaded from external
// sources. The language should have been passed in to us from the
// browser process as a command line flag.
if (SubprocessNeedsResourceBundle(process_type)) {
std::string locale = command_line->GetSwitchValueASCII(::switches::kLang);
LoadResourceBundle(locale);
}
#if defined(OS_WIN) || (defined(OS_MACOSX) && !defined(MAS_BUILD))
// In the main process, we wait for JS to call crashReporter.start() before
// initializing crashpad. If we're in the renderer, we want to initialize it
// immediately at boot.
if (!process_type.empty()) {
ElectronCrashReporterClient::Create();
crash_reporter::InitializeCrashpad(false, process_type);
}
#endif
#if defined(OS_LINUX)
if (process_type != service_manager::switches::kZygoteProcess &&
!process_type.empty()) {
ElectronCrashReporterClient::Create();
breakpad::InitCrashReporter(process_type);
}
#endif
#if !defined(MAS_BUILD)
crash_keys::SetCrashKeysFromCommandLine(*command_line);
crash_keys::SetPlatformCrashKey();
#endif
if (IsBrowserProcess(command_line)) {
// Only append arguments for browser process.
// Allow file:// URIs to read other file:// URIs by default.
command_line->AppendSwitch(::switches::kAllowFileAccessFromFiles);
#if defined(OS_MACOSX)
// Enable AVFoundation.
command_line->AppendSwitch("enable-avfoundation");
#endif
}
}
void ElectronMainDelegate::PreCreateMainMessageLoop() {
// This is initialized early because the service manager reads some feature
// flags and we need to make sure the feature list is initialized before the
// service manager reads the features.
InitializeFeatureList();
#if defined(OS_MACOSX)
RegisterAtomCrApp();
#endif
}
content::ContentBrowserClient*
ElectronMainDelegate::CreateContentBrowserClient() {
browser_client_ = std::make_unique<ElectronBrowserClient>();
return browser_client_.get();
}
content::ContentGpuClient* ElectronMainDelegate::CreateContentGpuClient() {
gpu_client_ = std::make_unique<ElectronGpuClient>();
return gpu_client_.get();
}
content::ContentRendererClient*
ElectronMainDelegate::CreateContentRendererClient() {
auto* command_line = base::CommandLine::ForCurrentProcess();
if (IsSandboxEnabled(command_line)) {
renderer_client_ = std::make_unique<ElectronSandboxedRendererClient>();
} else {
renderer_client_ = std::make_unique<ElectronRendererClient>();
}
return renderer_client_.get();
}
content::ContentUtilityClient*
ElectronMainDelegate::CreateContentUtilityClient() {
utility_client_ = std::make_unique<ElectronContentUtilityClient>();
return utility_client_.get();
}
int ElectronMainDelegate::RunProcess(
const std::string& process_type,
const content::MainFunctionParams& main_function_params) {
if (process_type == kRelauncherProcess)
return relauncher::RelauncherMain(main_function_params);
else
return -1;
}
bool ElectronMainDelegate::ShouldCreateFeatureList() {
return false;
}
bool ElectronMainDelegate::ShouldLockSchemeRegistry() {
return false;
}
#if defined(OS_LINUX)
void ElectronMainDelegate::ZygoteForked() {
// Needs to be called after we have DIR_USER_DATA. BrowserMain sets
// this up for the browser process in a different manner.
ElectronCrashReporterClient::Create();
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line->GetSwitchValueASCII(::switches::kProcessType);
breakpad::InitCrashReporter(process_type);
// Reset the command line for the newly spawned process.
crash_keys::SetCrashKeysFromCommandLine(*command_line);
}
#endif // defined(OS_LINUX)
} // namespace electron