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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/debug/crash_logging.h"
#include "base/debug/debugger.h"
#include "base/files/file_path.h"
#include "base/i18n/rtl.h"
#include "base/path_service.h"
#include "base/process/current_process.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/task/single_thread_task_executor.h"
#include "base/threading/platform_thread.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "content/child/child_process.h"
#include "content/common/content_constants_internal.h"
#include "content/common/content_switches_internal.h"
#include "content/ppapi_plugin/ppapi_thread.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "ipc/ipc_sender.h"
#include "ppapi/proxy/plugin_globals.h"
#include "services/tracing/public/cpp/trace_startup.h"
#include "ui/base/ui_base_switches.h"
#if BUILDFLAG(IS_WIN)
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/child/dwrite_font_proxy/dwrite_font_proxy_init_impl_win.h"
#include "sandbox/win/src/sandbox.h"
#include "third_party/blink/public/web/win/web_font_rendering.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/win/direct_write.h"
#endif
#if BUILDFLAG(IS_CHROMEOS)
#include "base/files/file_util.h"
#endif
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include "sandbox/policy/linux/sandbox_linux.h"
#include "sandbox/policy/sandbox_type.h"
#endif
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
#include "gin/v8_initializer.h"
#endif
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_ANDROID)
#include <stdlib.h>
#endif
#if BUILDFLAG(IS_MAC)
#include "base/system/sys_info.h"
#endif
#if BUILDFLAG(IS_WIN)
sandbox::TargetServices* g_target_services = NULL;
#else
void* g_target_services = nullptr;
#endif
namespace content {
// Main function for starting the PPAPI plugin process.
int PpapiPluginMain(MainFunctionParams parameters) {
const base::CommandLine& command_line = *parameters.command_line;
#if BUILDFLAG(IS_MAC)
// Declare that this process has CPU security mitigations enabled (see
// PpapiPluginSandboxedProcessLauncherDelegate::EnableCpuSecurityMitigations).
// This must be done before the first call to
// base::SysInfo::NumberOfProcessors().
base::SysInfo::SetCpuSecurityMitigationsEnabled();
#endif
#if BUILDFLAG(IS_WIN)
// https://crbug.com/1139752 Premature unload of shell32 caused process to
// crash during process shutdown. Fixed in Windows 11.
if (base::win::GetVersion() < base::win::Version::WIN11) {
HMODULE shell32_pin = ::LoadLibrary(L"shell32.dll");
UNREFERENCED_PARAMETER(shell32_pin);
}
g_target_services = parameters.sandbox_info->target_services;
#endif
// If |g_target_services| is not null this process is sandboxed. One side
// effect is that we can't pop dialogs like WaitForDebugger() does.
if (command_line.HasSwitch(switches::kPpapiStartupDialog)) {
if (g_target_services)
base::debug::WaitForDebugger(2*60, false);
else
WaitForDebugger("Ppapi");
}
// Set the default locale to be the current UI language. WebKit uses ICU's
// default locale for some font settings (especially switching between
// Japanese and Chinese fonts for the same characters).
if (command_line.HasSwitch(switches::kLang)) {
std::string locale = command_line.GetSwitchValueASCII(switches::kLang);
base::i18n::SetICUDefaultLocale(locale);
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_ANDROID)
// TODO(shess): Flash appears to have a POSIX locale dependency
// outside of the existing PPAPI ICU support. Certain games hang
// while loading, and it seems related to datetime formatting.
// http://crbug.com/155396
// http://crbug.com/155671
//
// ICU can accept "en-US" or "en_US", but POSIX wants "en_US".
std::replace(locale.begin(), locale.end(), '-', '_');
locale.append(".UTF-8");
setlocale(LC_ALL, locale.c_str());
setenv("LANG", locale.c_str(), 0);
#endif
}
#if BUILDFLAG(IS_CHROMEOS)
// Specifies $HOME explicitly because some plugins rely on $HOME but
// no other part of Chrome OS uses that. See crbug.com/335290.
base::FilePath homedir;
base::PathService::Get(base::DIR_HOME, &homedir);
setenv("HOME", homedir.value().c_str(), 1);
#endif
base::SingleThreadTaskExecutor main_thread_task_executor;
base::PlatformThread::SetName("CrPPAPIMain");
base::CurrentProcess::GetInstance().SetProcessType(
base::CurrentProcessType::PROCESS_PPAPI_PLUGIN);
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
gin::V8Initializer::LoadV8Snapshot();
#endif
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
sandbox::policy::SandboxLinux::GetInstance()->InitializeSandbox(
sandbox::policy::SandboxTypeFromCommandLine(command_line),
sandbox::policy::SandboxLinux::PreSandboxHook(),
sandbox::policy::SandboxLinux::Options());
#endif
ChildProcess ppapi_process;
base::RunLoop run_loop;
ppapi_process.set_main_thread(
new PpapiThread(run_loop.QuitClosure(), command_line));
// Mojo IPC support is brought up by PpapiThread, so startup tracing is
// enabled here if it needs to start after mojo init (normally so the mojo
// broker can bypass the sandbox to allocate startup tracing's SMB).
if (parameters.needs_startup_tracing_after_mojo_init) {
tracing::EnableStartupTracingIfNeeded();
}
#if BUILDFLAG(IS_WIN)
if (!base::win::IsUser32AndGdi32Available())
gfx::win::InitializeDirectWrite();
InitializeDWriteFontProxy();
int antialiasing_enabled = 1;
base::StringToInt(
command_line.GetSwitchValueASCII(switches::kPpapiAntialiasedTextEnabled),
&antialiasing_enabled);
blink::WebFontRendering::SetAntialiasedTextEnabled(
antialiasing_enabled ? true : false);
int subpixel_rendering = 0;
base::StringToInt(command_line.GetSwitchValueASCII(
switches::kPpapiSubpixelRenderingSetting),
&subpixel_rendering);
blink::WebFontRendering::SetLCDTextEnabled(
subpixel_rendering != gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
#endif
run_loop.Run();
#if BUILDFLAG(IS_WIN)
UninitializeDWriteFontProxy();
#endif
return 0;
}
} // namespace content
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