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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/base_paths.h"
      6 #include "base/command_line.h"
      7 #include "base/debug/debugger.h"
      8 #include "base/files/file_path.h"
      9 #include "base/i18n/rtl.h"
     10 #include "base/message_loop/message_loop.h"
     11 #include "base/path_service.h"
     12 #include "base/threading/platform_thread.h"
     13 #include "build/build_config.h"
     14 #include "content/child/child_process.h"
     15 #include "content/common/content_constants_internal.h"
     16 #include "content/common/sandbox_linux/sandbox_linux.h"
     17 #include "content/ppapi_plugin/ppapi_thread.h"
     18 #include "content/public/common/content_client.h"
     19 #include "content/public/common/content_switches.h"
     20 #include "content/public/common/main_function_params.h"
     21 #include "content/public/plugin/content_plugin_client.h"
     22 #include "crypto/nss_util.h"
     23 #include "ppapi/proxy/plugin_globals.h"
     24 #include "ppapi/proxy/proxy_module.h"
     25 #include "ui/base/ui_base_switches.h"
     26 
     27 #if defined(OS_WIN)
     28 #include "sandbox/win/src/sandbox.h"
     29 #include "third_party/skia/include/ports/SkTypeface_win.h"
     30 #endif
     31 
     32 #if defined(OS_CHROMEOS)
     33 #include "base/files/file_util.h"
     34 #endif
     35 
     36 #if defined(OS_LINUX)
     37 #include "content/public/common/sandbox_init.h"
     38 #endif
     39 
     40 #if defined(OS_POSIX) && !defined(OS_ANDROID)
     41 #include <stdlib.h>
     42 #endif
     43 
     44 #if defined(OS_WIN)
     45 sandbox::TargetServices* g_target_services = NULL;
     46 #else
     47 void* g_target_services = 0;
     48 #endif
     49 
     50 namespace content {
     51 
     52 namespace {
     53 
     54 #if defined(OS_WIN)
     55 // Windows-only skia sandbox support
     56 void SkiaPreCacheFont(const LOGFONT& logfont) {
     57   ppapi::proxy::PluginGlobals::Get()->PreCacheFontForFlash(
     58       reinterpret_cast<const void*>(&logfont));
     59 }
     60 #endif
     61 
     62 }  // namespace
     63 
     64 // Main function for starting the PPAPI plugin process.
     65 int PpapiPluginMain(const MainFunctionParams& parameters) {
     66   const CommandLine& command_line = parameters.command_line;
     67 
     68 #if defined(OS_WIN)
     69   g_target_services = parameters.sandbox_info->target_services;
     70 #endif
     71 
     72   // If |g_target_services| is not null this process is sandboxed. One side
     73   // effect is that we can't pop dialogs like ChildProcess::WaitForDebugger()
     74   // does.
     75   if (command_line.HasSwitch(switches::kPpapiStartupDialog)) {
     76     if (g_target_services)
     77       base::debug::WaitForDebugger(2*60, false);
     78     else
     79       ChildProcess::WaitForDebugger("Ppapi");
     80   }
     81 
     82   // Set the default locale to be the current UI language. WebKit uses ICU's
     83   // default locale for some font settings (especially switching between
     84   // Japanese and Chinese fonts for the same characters).
     85   if (command_line.HasSwitch(switches::kLang)) {
     86     std::string locale = command_line.GetSwitchValueASCII(switches::kLang);
     87     base::i18n::SetICUDefaultLocale(locale);
     88 
     89 #if defined(OS_POSIX) && !defined(OS_ANDROID)
     90     // TODO(shess): Flash appears to have a POSIX locale dependency
     91     // outside of the existing PPAPI ICU support.  Certain games hang
     92     // while loading, and it seems related to datetime formatting.
     93     // http://crbug.com/155396
     94     // http://crbug.com/155671
     95     //
     96     // ICU can accept "en-US" or "en_US", but POSIX wants "en_US".
     97     std::replace(locale.begin(), locale.end(), '-', '_');
     98     locale.append(".UTF-8");
     99     setlocale(LC_ALL, locale.c_str());
    100     setenv("LANG", locale.c_str(), 0);
    101 #endif
    102   }
    103 
    104 #if defined(OS_CHROMEOS)
    105   // Specifies $HOME explicitly because some plugins rely on $HOME but
    106   // no other part of Chrome OS uses that.  See crbug.com/335290.
    107   base::FilePath homedir;
    108   PathService::Get(base::DIR_HOME, &homedir);
    109   setenv("HOME", homedir.value().c_str(), 1);
    110 #endif
    111 
    112   base::MessageLoop main_message_loop;
    113   base::PlatformThread::SetName("CrPPAPIMain");
    114   base::debug::TraceLog::GetInstance()->SetProcessName("PPAPI Process");
    115   base::debug::TraceLog::GetInstance()->SetProcessSortIndex(
    116       kTraceEventPpapiProcessSortIndex);
    117 
    118 #if defined(OS_LINUX) && defined(USE_NSS)
    119   // Some out-of-process PPAPI plugins use NSS.
    120   // NSS must be initialized before enabling the sandbox below.
    121   crypto::InitNSSSafely();
    122 #endif
    123 
    124   // Allow the embedder to perform any necessary per-process initialization
    125   // before the sandbox is initialized.
    126   if (GetContentClient()->plugin())
    127     GetContentClient()->plugin()->PreSandboxInitialization();
    128 
    129 #if defined(OS_LINUX)
    130   LinuxSandbox::InitializeSandbox();
    131 #endif
    132 
    133   ChildProcess ppapi_process;
    134   ppapi_process.set_main_thread(
    135       new PpapiThread(parameters.command_line, false));  // Not a broker.
    136 
    137 #if defined(OS_WIN)
    138   SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
    139 #endif
    140 
    141   main_message_loop.Run();
    142   return 0;
    143 }
    144 
    145 }  // namespace content
    146