content/ppapi_plugin/ppapi_plugin_main.cc

   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 base::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::trace_event::TraceLog::GetInstance()->SetProcessName("PPAPI Process");
 115   base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
 116       kTraceEventPpapiProcessSortIndex);
 117
 118 #if defined(OS_LINUX) && defined(USE_NSS_CERTS)
 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