src/chrome/renderer/chrome_render_process_observer.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 "chrome/renderer/chrome_render_process_observer.h"
   6
   7 #include <limits>
   8 #include <vector>
   9
  10 #include "base/allocator/allocator_extension.h"
  11 #include "base/bind.h"
  12 #include "base/command_line.h"
  13 #include "base/files/file_util.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/metrics/field_trial.h"
  17 #include "base/metrics/histogram.h"
  18 #include "base/metrics/statistics_recorder.h"
  19 #include "base/native_library.h"
  20 #include "base/path_service.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/threading/platform_thread.h"
  23 #include "chrome/common/child_process_logging.h"
  24 #include "chrome/common/chrome_paths.h"
  25 #include "chrome/common/chrome_switches.h"
  26 #include "chrome/common/net/net_resource_provider.h"
  27 #include "chrome/common/render_messages.h"
  28 #include "chrome/common/url_constants.h"
  29 #include "chrome/common/variations/variations_util.h"
  30 #include "chrome/renderer/content_settings_observer.h"
  31 #include "chrome/renderer/security_filter_peer.h"
  32 #include "content/public/child/resource_dispatcher_delegate.h"
  33 #include "content/public/renderer/render_thread.h"
  34 #include "content/public/renderer/render_view.h"
  35 #include "content/public/renderer/render_view_visitor.h"
  36 #include "crypto/nss_util.h"
  37 #include "net/base/net_errors.h"
  38 #include "net/base/net_module.h"
  39 #include "third_party/WebKit/public/web/WebCache.h"
  40 #include "third_party/WebKit/public/web/WebDocument.h"
  41 #include "third_party/WebKit/public/web/WebFrame.h"
  42 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  43 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
  44 #include "third_party/WebKit/public/web/WebView.h"
  45
  46 #if defined(OS_WIN)
  47 #include "base/win/iat_patch_function.h"
  48 #endif
  49
  50 #if defined(ENABLE_EXTENSIONS)
  51 #include "chrome/renderer/extensions/extension_localization_peer.h"
  52 #endif
  53
  54 using blink::WebCache;
  55 using blink::WebRuntimeFeatures;
  56 using blink::WebSecurityPolicy;
  57 using blink::WebString;
  58 using content::RenderThread;
  59
  60 namespace {
  61
  62 const int kCacheStatsDelayMS = 2000;
  63
  64 class RendererResourceDelegate : public content::ResourceDispatcherDelegate {
  65  public:
  66   RendererResourceDelegate()
  67       : weak_factory_(this) {
  68   }
  69
  70   content::RequestPeer* OnRequestComplete(content::RequestPeer* current_peer,
  71                                           content::ResourceType resource_type,
  72                                           int error_code) override {
  73     // Update the browser about our cache.
  74     // Rate limit informing the host of our cache stats.
  75     if (!weak_factory_.HasWeakPtrs()) {
  76       base::MessageLoop::current()->PostDelayedTask(
  77           FROM_HERE,
  78           base::Bind(&RendererResourceDelegate::InformHostOfCacheStats,
  79                      weak_factory_.GetWeakPtr()),
  80           base::TimeDelta::FromMilliseconds(kCacheStatsDelayMS));
  81     }
  82
  83     if (error_code == net::ERR_ABORTED) {
  84       return NULL;
  85     }
  86
  87     // Resource canceled with a specific error are filtered.
  88     return SecurityFilterPeer::CreateSecurityFilterPeerForDeniedRequest(
  89         resource_type, current_peer, error_code);
  90   }
  91
  92   content::RequestPeer* OnReceivedResponse(content::RequestPeer* current_peer,
  93                                            const std::string& mime_type,
  94                                            const GURL& url) override {
  95 #if defined(ENABLE_EXTENSIONS)
  96     return ExtensionLocalizationPeer::CreateExtensionLocalizationPeer(
  97         current_peer, RenderThread::Get(), mime_type, url);
  98 #else
  99     return NULL;
 100 #endif
 101   }
 102
 103  private:
 104   void InformHostOfCacheStats() {
 105     WebCache::UsageStats stats;
 106     WebCache::getUsageStats(&stats);
 107     RenderThread::Get()->Send(new ChromeViewHostMsg_UpdatedCacheStats(stats));
 108   }
 109
 110   base::WeakPtrFactory<RendererResourceDelegate> weak_factory_;
 111
 112   DISALLOW_COPY_AND_ASSIGN(RendererResourceDelegate);
 113 };
 114
 115 #if defined(OS_WIN)
 116 static base::win::IATPatchFunction g_iat_patch_createdca;
 117 HDC WINAPI CreateDCAPatch(LPCSTR driver_name,
 118                           LPCSTR device_name,
 119                           LPCSTR output,
 120                           const void* init_data) {
 121   DCHECK(std::string("DISPLAY") == std::string(driver_name));
 122   DCHECK(!device_name);
 123   DCHECK(!output);
 124   DCHECK(!init_data);
 125
 126   // CreateDC fails behind the sandbox, but not CreateCompatibleDC.
 127   return CreateCompatibleDC(NULL);
 128 }
 129
 130 static base::win::IATPatchFunction g_iat_patch_get_font_data;
 131 DWORD WINAPI GetFontDataPatch(HDC hdc,
 132                               DWORD table,
 133                               DWORD offset,
 134                               LPVOID buffer,
 135                               DWORD length) {
 136   int rv = GetFontData(hdc, table, offset, buffer, length);
 137   if (rv == GDI_ERROR && hdc) {
 138     HFONT font = static_cast<HFONT>(GetCurrentObject(hdc, OBJ_FONT));
 139
 140     LOGFONT logfont;
 141     if (GetObject(font, sizeof(LOGFONT), &logfont)) {
 142       std::vector<char> font_data;
 143       RenderThread::Get()->PreCacheFont(logfont);
 144       rv = GetFontData(hdc, table, offset, buffer, length);
 145       RenderThread::Get()->ReleaseCachedFonts();
 146     }
 147   }
 148   return rv;
 149 }
 150 #endif  // OS_WIN
 151
 152 static const int kWaitForWorkersStatsTimeoutMS = 20;
 153
 154 class HeapStatisticsCollector {
 155  public:
 156   HeapStatisticsCollector() : round_id_(0) {}
 157
 158   void InitiateCollection();
 159   static HeapStatisticsCollector* Instance();
 160
 161  private:
 162   void CollectOnWorkerThread(scoped_refptr<base::TaskRunner> master,
 163                              int round_id);
 164   void ReceiveStats(int round_id, size_t total_size, size_t used_size);
 165   void SendStatsToBrowser(int round_id);
 166
 167   size_t total_bytes_;
 168   size_t used_bytes_;
 169   int workers_to_go_;
 170   int round_id_;
 171 };
 172
 173 HeapStatisticsCollector* HeapStatisticsCollector::Instance() {
 174   CR_DEFINE_STATIC_LOCAL(HeapStatisticsCollector, instance, ());
 175   return &instance;
 176 }
 177
 178 void HeapStatisticsCollector::InitiateCollection() {
 179   v8::HeapStatistics heap_stats;
 180   v8::Isolate::GetCurrent()->GetHeapStatistics(&heap_stats);
 181   total_bytes_ = heap_stats.total_heap_size();
 182   used_bytes_ = heap_stats.used_heap_size();
 183   base::Closure collect = base::Bind(
 184       &HeapStatisticsCollector::CollectOnWorkerThread,
 185       base::Unretained(this),
 186       base::MessageLoopProxy::current(),
 187       round_id_);
 188   workers_to_go_ = RenderThread::Get()->PostTaskToAllWebWorkers(collect);
 189   if (workers_to_go_) {
 190     // The guard task to send out partial stats
 191     // in case some workers are not responsive.
 192     base::MessageLoopProxy::current()->PostDelayedTask(
 193         FROM_HERE,
 194         base::Bind(&HeapStatisticsCollector::SendStatsToBrowser,
 195                    base::Unretained(this),
 196                    round_id_),
 197         base::TimeDelta::FromMilliseconds(kWaitForWorkersStatsTimeoutMS));
 198   } else {
 199     // No worker threads so just send out the main thread data right away.
 200     SendStatsToBrowser(round_id_);
 201   }
 202 }
 203
 204 void HeapStatisticsCollector::CollectOnWorkerThread(
 205     scoped_refptr<base::TaskRunner> master,
 206     int round_id) {
 207
 208   size_t total_bytes = 0;
 209   size_t used_bytes = 0;
 210   v8::Isolate* isolate = v8::Isolate::GetCurrent();
 211   if (isolate) {
 212     v8::HeapStatistics heap_stats;
 213     isolate->GetHeapStatistics(&heap_stats);
 214     total_bytes = heap_stats.total_heap_size();
 215     used_bytes = heap_stats.used_heap_size();
 216   }
 217   master->PostTask(
 218       FROM_HERE,
 219       base::Bind(&HeapStatisticsCollector::ReceiveStats,
 220                  base::Unretained(this),
 221                  round_id,
 222                  total_bytes,
 223                  used_bytes));
 224 }
 225
 226 void HeapStatisticsCollector::ReceiveStats(int round_id,
 227                                            size_t total_bytes,
 228                                            size_t used_bytes) {
 229   if (round_id != round_id_)
 230     return;
 231   total_bytes_ += total_bytes;
 232   used_bytes_ += used_bytes;
 233   if (!--workers_to_go_)
 234     SendStatsToBrowser(round_id);
 235 }
 236
 237 void HeapStatisticsCollector::SendStatsToBrowser(int round_id) {
 238   if (round_id != round_id_)
 239     return;
 240   // TODO(alph): Do caching heap stats and use the cache if we haven't got
 241   //             reply from a worker.
 242   //             Currently a busy worker stats are not counted.
 243   RenderThread::Get()->Send(new ChromeViewHostMsg_V8HeapStats(
 244       total_bytes_, used_bytes_));
 245   ++round_id_;
 246 }
 247
 248 }  // namespace
 249
 250 bool ChromeRenderProcessObserver::is_incognito_process_ = false;
 251
 252 ChromeRenderProcessObserver::ChromeRenderProcessObserver(
 253     ChromeContentRendererClient* client)
 254     : client_(client),
 255       webkit_initialized_(false) {
 256   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 257
 258 #if defined(ENABLE_AUTOFILL_DIALOG)
 259   WebRuntimeFeatures::enableRequestAutocomplete(true);
 260 #endif
 261
 262   if (command_line.HasSwitch(switches::kEnableShowModalDialog))
 263     WebRuntimeFeatures::enableShowModalDialog(true);
 264
 265   if (command_line.HasSwitch(switches::kJavaScriptHarmony)) {
 266     std::string flag("--harmony");
 267     v8::V8::SetFlagsFromString(flag.c_str(), static_cast<int>(flag.size()));
 268   }
 269
 270   RenderThread* thread = RenderThread::Get();
 271   resource_delegate_.reset(new RendererResourceDelegate());
 272   thread->SetResourceDispatcherDelegate(resource_delegate_.get());
 273
 274   // Configure modules that need access to resources.
 275   net::NetModule::SetResourceProvider(chrome_common_net::NetResourceProvider);
 276
 277 #if defined(OS_WIN)
 278   // Need to patch a few functions for font loading to work correctly.
 279   base::FilePath pdf;
 280   if (PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf) &&
 281       base::PathExists(pdf)) {
 282     g_iat_patch_createdca.Patch(
 283         pdf.value().c_str(), "gdi32.dll", "CreateDCA", CreateDCAPatch);
 284     g_iat_patch_get_font_data.Patch(
 285         pdf.value().c_str(), "gdi32.dll", "GetFontData", GetFontDataPatch);
 286   }
 287 #endif
 288
 289 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(USE_NSS)
 290   // On platforms where we use system NSS shared libraries,
 291   // initialize NSS now because it won't be able to load the .so's
 292   // after we engage the sandbox.
 293   if (!command_line.HasSwitch(switches::kSingleProcess))
 294     crypto::InitNSSSafely();
 295 #elif defined(OS_WIN)
 296   // crypt32.dll is used to decode X509 certificates for Chromoting.
 297   // Only load this library when the feature is enabled.
 298   base::LoadNativeLibrary(base::FilePath(L"crypt32.dll"), NULL);
 299 #endif
 300   // Setup initial set of crash dump data for Field Trials in this renderer.
 301   chrome_variations::SetChildProcessLoggingVariationList();
 302 }
 303
 304 ChromeRenderProcessObserver::~ChromeRenderProcessObserver() {
 305 }
 306
 307 bool ChromeRenderProcessObserver::OnControlMessageReceived(
 308     const IPC::Message& message) {
 309   bool handled = true;
 310   IPC_BEGIN_MESSAGE_MAP(ChromeRenderProcessObserver, message)
 311     IPC_MESSAGE_HANDLER(ChromeViewMsg_SetIsIncognitoProcess,
 312                         OnSetIsIncognitoProcess)
 313     IPC_MESSAGE_HANDLER(ChromeViewMsg_SetFieldTrialGroup, OnSetFieldTrialGroup)
 314     IPC_MESSAGE_HANDLER(ChromeViewMsg_GetV8HeapStats, OnGetV8HeapStats)
 315     IPC_MESSAGE_HANDLER(ChromeViewMsg_GetCacheResourceStats,
 316                         OnGetCacheResourceStats)
 317     IPC_MESSAGE_HANDLER(ChromeViewMsg_SetContentSettingRules,
 318                         OnSetContentSettingRules)
 319     IPC_MESSAGE_UNHANDLED(handled = false)
 320   IPC_END_MESSAGE_MAP()
 321   return handled;
 322 }
 323
 324 void ChromeRenderProcessObserver::WebKitInitialized() {
 325   webkit_initialized_ = true;
 326   // chrome-native: is a scheme used for placeholder navigations that allow
 327   // UIs to be drawn with platform native widgets instead of HTML.  These pages
 328   // should not be accessible, and should also be treated as empty documents
 329   // that can commit synchronously.  No code should be runnable in these pages,
 330   // so it should not need to access anything nor should it allow javascript
 331   // URLs since it should never be visible to the user.
 332   WebString native_scheme(base::ASCIIToUTF16(chrome::kChromeNativeScheme));
 333   WebSecurityPolicy::registerURLSchemeAsDisplayIsolated(native_scheme);
 334   WebSecurityPolicy::registerURLSchemeAsEmptyDocument(native_scheme);
 335   WebSecurityPolicy::registerURLSchemeAsNoAccess(native_scheme);
 336   WebSecurityPolicy::registerURLSchemeAsNotAllowingJavascriptURLs(
 337       native_scheme);
 338 }
 339
 340 void ChromeRenderProcessObserver::OnRenderProcessShutdown() {
 341   webkit_initialized_ = false;
 342 }
 343
 344 void ChromeRenderProcessObserver::OnSetIsIncognitoProcess(
 345     bool is_incognito_process) {
 346   is_incognito_process_ = is_incognito_process;
 347 }
 348
 349 void ChromeRenderProcessObserver::OnSetContentSettingRules(
 350     const RendererContentSettingRules& rules) {
 351   content_setting_rules_ = rules;
 352 }
 353
 354 void ChromeRenderProcessObserver::OnGetCacheResourceStats() {
 355   WebCache::ResourceTypeStats stats;
 356   if (webkit_initialized_)
 357     WebCache::getResourceTypeStats(&stats);
 358   RenderThread::Get()->Send(new ChromeViewHostMsg_ResourceTypeStats(stats));
 359 }
 360
 361 void ChromeRenderProcessObserver::OnSetFieldTrialGroup(
 362     const std::string& field_trial_name,
 363     const std::string& group_name) {
 364   base::FieldTrial* trial =
 365       base::FieldTrialList::CreateFieldTrial(field_trial_name, group_name);
 366   // TODO(mef): Remove this check after the investigation of 359406 is complete.
 367   CHECK(trial) << field_trial_name << ":" << group_name;
 368   // Ensure the trial is marked as "used" by calling group() on it. This is
 369   // needed to ensure the trial is properly reported in renderer crash reports.
 370   trial->group();
 371   chrome_variations::SetChildProcessLoggingVariationList();
 372 }
 373
 374 void ChromeRenderProcessObserver::OnGetV8HeapStats() {
 375   HeapStatisticsCollector::Instance()->InitiateCollection();
 376 }
 377
 378 const RendererContentSettingRules*
 379 ChromeRenderProcessObserver::content_setting_rules() const {
 380   return &content_setting_rules_;
 381 }