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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/tracing/chrome_tracing_delegate.h"
#include <utility>
#include "base/prefs/pref_registry_simple.h"
#include "base/prefs/pref_service.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/tracing/crash_service_uploader.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_otr_state.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/trace_event_args_whitelist.h"
#include "components/metrics/metrics_pref_names.h"
#include "components/variations/active_field_trials.h"
#include "content/public/browser/background_tracing_config.h"
#include "content/public/browser/browser_thread.h"
namespace {
const int kMinDaysUntilNextUpload = 7;
} // namespace
void ChromeTracingDelegate::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterInt64Pref(prefs::kBackgroundTracingLastUpload, 0);
}
ChromeTracingDelegate::ChromeTracingDelegate() : incognito_launched_(false) {
CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
BrowserList::AddObserver(this);
}
ChromeTracingDelegate::~ChromeTracingDelegate() {
CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
BrowserList::RemoveObserver(this);
}
void ChromeTracingDelegate::OnBrowserAdded(Browser* browser) {
if (browser->profile()->IsOffTheRecord())
incognito_launched_ = true;
}
scoped_ptr<content::TraceUploader> ChromeTracingDelegate::GetTraceUploader(
net::URLRequestContextGetter* request_context) {
return scoped_ptr<content::TraceUploader>(
new TraceCrashServiceUploader(request_context));
}
namespace {
enum PermitMissingProfile { PROFILE_REQUIRED, PROFILE_NOT_REQUIRED };
bool ProfileAllowsScenario(const content::BackgroundTracingConfig& config,
PermitMissingProfile profile_permission) {
ProfileManager* profile_manager = g_browser_process->profile_manager();
if (!profile_manager)
return false;
Profile* profile = profile_manager->GetProfileByPath(
profile_manager->GetLastUsedProfileDir(profile_manager->user_data_dir()));
// If the profile hasn't loaded or been created yet, we allow the scenario
// to start up, but not be finalized.
if (!profile) {
if (profile_permission == PROFILE_REQUIRED)
return false;
else
return true;
}
// Safeguard, in case background tracing is responsible for a crash on
// startup.
if (profile->GetLastSessionExitType() == Profile::EXIT_CRASHED)
return false;
PrefService* local_state = g_browser_process->local_state();
DCHECK(local_state);
#if !defined(OS_CHROMEOS)
if (!local_state->GetBoolean(metrics::prefs::kMetricsReportingEnabled))
return false;
#endif // OS_CHROMEOS
if (config.tracing_mode() == content::BackgroundTracingConfig::PREEMPTIVE) {
const base::Time last_upload_time = base::Time::FromInternalValue(
local_state->GetInt64(prefs::kBackgroundTracingLastUpload));
if (!last_upload_time.is_null()) {
base::Time computed_next_allowed_time =
last_upload_time + base::TimeDelta::FromDays(kMinDaysUntilNextUpload);
if (computed_next_allowed_time > base::Time::Now()) {
return false;
}
}
}
return true;
}
} // namespace
bool ChromeTracingDelegate::IsAllowedToBeginBackgroundScenario(
const content::BackgroundTracingConfig& config,
bool requires_anonymized_data) {
if (!ProfileAllowsScenario(config, PROFILE_NOT_REQUIRED))
return false;
if (requires_anonymized_data && chrome::IsOffTheRecordSessionActive())
return false;
return true;
}
bool ChromeTracingDelegate::IsAllowedToEndBackgroundScenario(
const content::BackgroundTracingConfig& config,
bool requires_anonymized_data) {
if (requires_anonymized_data && incognito_launched_)
return false;
if (!ProfileAllowsScenario(config, PROFILE_REQUIRED))
return false;
if (config.tracing_mode() == content::BackgroundTracingConfig::PREEMPTIVE) {
PrefService* local_state = g_browser_process->local_state();
DCHECK(local_state);
local_state->SetInt64(prefs::kBackgroundTracingLastUpload,
base::Time::Now().ToInternalValue());
// We make sure we've persisted the value in case finalizing the tracing
// causes a crash.
local_state->CommitPendingWrite();
}
return true;
}
void ChromeTracingDelegate::GenerateMetadataDict(
base::DictionaryValue* metadata_dict) {
DCHECK(metadata_dict);
std::vector<std::string> variations;
variations::GetFieldTrialActiveGroupIdsAsStrings(&variations);
scoped_ptr<base::ListValue> variations_list(new base::ListValue());
for (const auto& it : variations)
variations_list->Append(new base::StringValue(it));
metadata_dict->Set("field-trials", std::move(variations_list));
}
content::MetadataFilterPredicate
ChromeTracingDelegate::GetMetadataFilterPredicate() {
return base::Bind(&IsMetadataWhitelisted);
}
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