chrome/browser/tracing/chrome_tracing_delegate.cc

   1 // Copyright 2015 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/browser/tracing/chrome_tracing_delegate.h"
   6
   7 #include "base/prefs/pref_registry_simple.h"
   8 #include "base/prefs/pref_service.h"
   9 #include "base/time/time.h"
  10 #include "chrome/browser/browser_process.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/profiles/profile_manager.h"
  13 #include "chrome/browser/tracing/crash_service_uploader.h"
  14 #include "chrome/browser/ui/browser.h"
  15 #include "chrome/browser/ui/browser_list.h"
  16 #include "chrome/browser/ui/browser_otr_state.h"
  17 #include "chrome/common/pref_names.h"
  18 #include "content/public/browser/background_tracing_config.h"
  19 #include "content/public/browser/browser_thread.h"
  20
  21 namespace {
  22
  23 const int kMinDaysUntilNextUpload = 7;
  24
  25 }  // namespace
  26
  27 void ChromeTracingDelegate::RegisterPrefs(PrefRegistrySimple* registry) {
  28   registry->RegisterInt64Pref(prefs::kBackgroundTracingLastUpload, 0);
  29 }
  30
  31 ChromeTracingDelegate::ChromeTracingDelegate() : incognito_launched_(false) {
  32   CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  33   BrowserList::AddObserver(this);
  34 }
  35
  36 ChromeTracingDelegate::~ChromeTracingDelegate() {
  37   CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  38   BrowserList::RemoveObserver(this);
  39 }
  40
  41 void ChromeTracingDelegate::OnBrowserAdded(Browser* browser) {
  42   if (browser->profile()->IsOffTheRecord())
  43     incognito_launched_ = true;
  44 }
  45
  46 scoped_ptr<content::TraceUploader> ChromeTracingDelegate::GetTraceUploader(
  47     net::URLRequestContextGetter* request_context) {
  48   return scoped_ptr<content::TraceUploader>(
  49       new TraceCrashServiceUploader(request_context));
  50 }
  51
  52 namespace {
  53
  54 enum PermitMissingProfile { PROFILE_REQUIRED, PROFILE_NOT_REQUIRED };
  55
  56 bool ProfileAllowsScenario(const content::BackgroundTracingConfig& config,
  57                            PermitMissingProfile profile_permission) {
  58   ProfileManager* profile_manager = g_browser_process->profile_manager();
  59   if (!profile_manager)
  60     return false;
  61
  62   Profile* profile = profile_manager->GetProfileByPath(
  63       profile_manager->GetLastUsedProfileDir(profile_manager->user_data_dir()));
  64
  65   // If the profile hasn't loaded or been created yet, we allow the scenario
  66   // to start up, but not be finalized.
  67   if (!profile) {
  68     if (profile_permission == PROFILE_REQUIRED)
  69       return false;
  70     else
  71       return true;
  72   }
  73
  74   // Safeguard, in case background tracing is responsible for a crash on
  75   // startup.
  76   if (profile->GetLastSessionExitType() == Profile::EXIT_CRASHED)
  77     return false;
  78
  79   if (config.tracing_mode() == content::BackgroundTracingConfig::PREEMPTIVE) {
  80     PrefService* local_state = g_browser_process->local_state();
  81     DCHECK(local_state);
  82     const base::Time last_upload_time = base::Time::FromInternalValue(
  83         local_state->GetInt64(prefs::kBackgroundTracingLastUpload));
  84     if (!last_upload_time.is_null()) {
  85       base::Time computed_next_allowed_time =
  86           last_upload_time + base::TimeDelta::FromDays(kMinDaysUntilNextUpload);
  87       if (computed_next_allowed_time > base::Time::Now()) {
  88         return false;
  89       }
  90     }
  91   }
  92
  93   return true;
  94 }
  95
  96 }  // namespace
  97
  98 bool ChromeTracingDelegate::IsAllowedToBeginBackgroundScenario(
  99     const content::BackgroundTracingConfig& config,
 100     bool requires_anonymized_data) {
 101   if (!ProfileAllowsScenario(config, PROFILE_NOT_REQUIRED))
 102     return false;
 103
 104   if (requires_anonymized_data && chrome::IsOffTheRecordSessionActive())
 105     return false;
 106
 107   return true;
 108 }
 109
 110 bool ChromeTracingDelegate::IsAllowedToEndBackgroundScenario(
 111     const content::BackgroundTracingConfig& config,
 112     bool requires_anonymized_data) {
 113   if (requires_anonymized_data && incognito_launched_)
 114     return false;
 115
 116   if (!ProfileAllowsScenario(config, PROFILE_REQUIRED))
 117     return false;
 118
 119   if (config.tracing_mode() == content::BackgroundTracingConfig::PREEMPTIVE) {
 120     PrefService* local_state = g_browser_process->local_state();
 121     DCHECK(local_state);
 122     local_state->SetInt64(prefs::kBackgroundTracingLastUpload,
 123                           base::Time::Now().ToInternalValue());
 124
 125     // We make sure we've persisted the value in case finalizing the tracing
 126     // causes a crash.
 127     local_state->CommitPendingWrite();
 128   }
 129
 130   return true;
 131 }