1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/environment_recorder.h"
#include "base/base64.h"
#include "base/hash/sha1.h"
#include "base/strings/string_number_conversions.h"
#include "components/metrics/metrics_pref_names.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "third_party/metrics_proto/system_profile.pb.h"
namespace metrics {
namespace {
// Computes a SHA-1 hash of |data| and returns it as a hex string.
std::string ComputeSHA1(const std::string& data) {
return base::HexEncode(base::SHA1Hash(base::as_byte_span(data)));
}
} // namespace
EnvironmentRecorder::EnvironmentRecorder(PrefService* local_state)
: local_state_(local_state) {}
EnvironmentRecorder::~EnvironmentRecorder() = default;
std::string EnvironmentRecorder::SerializeAndRecordEnvironmentToPrefs(
const SystemProfileProto& system_profile) {
std::string serialized_system_profile;
if (system_profile.SerializeToString(&serialized_system_profile)) {
// Persist the system profile to disk. In the event of an unclean shutdown,
// it will be used as part of the initial stability report.
const std::string base64_system_profile =
base::Base64Encode(serialized_system_profile);
local_state_->SetString(prefs::kStabilitySavedSystemProfile,
base64_system_profile);
local_state_->SetString(prefs::kStabilitySavedSystemProfileHash,
ComputeSHA1(serialized_system_profile));
}
return serialized_system_profile;
}
bool EnvironmentRecorder::LoadEnvironmentFromPrefs(
SystemProfileProto* system_profile) {
DCHECK(system_profile);
const std::string base64_system_profile =
local_state_->GetString(prefs::kStabilitySavedSystemProfile);
if (base64_system_profile.empty())
return false;
const std::string system_profile_hash =
local_state_->GetString(prefs::kStabilitySavedSystemProfileHash);
std::string serialized_system_profile;
if (!base::Base64Decode(base64_system_profile, &serialized_system_profile)) {
return false;
}
if (ComputeSHA1(serialized_system_profile) != system_profile_hash) {
return false;
}
if (!system_profile->ParseFromString(serialized_system_profile)) {
return false;
}
// Prevent initial stability logs from having the `fg_bg_id` field set, since
// those logs contain metrics *about* a previous session, and are not emitted
// during those sessions (and should certainly not be associated with any
// particular background or foreground period).
system_profile->clear_fg_bg_id();
return true;
}
void EnvironmentRecorder::ClearEnvironmentFromPrefs() {
local_state_->ClearPref(prefs::kStabilitySavedSystemProfile);
local_state_->ClearPref(prefs::kStabilitySavedSystemProfileHash);
}
int64_t EnvironmentRecorder::GetLastBuildtime() {
return local_state_->GetInt64(prefs::kStabilityStatsBuildTime);
}
std::string EnvironmentRecorder::GetLastVersion() {
return local_state_->GetString(prefs::kStabilityStatsVersion);
}
void EnvironmentRecorder::SetBuildtimeAndVersion(int64_t buildtime,
const std::string& version) {
local_state_->SetInt64(prefs::kStabilityStatsBuildTime, buildtime);
local_state_->SetString(prefs::kStabilityStatsVersion, version);
}
// static
void EnvironmentRecorder::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterStringPref(prefs::kStabilitySavedSystemProfile,
std::string());
registry->RegisterStringPref(prefs::kStabilitySavedSystemProfileHash,
std::string());
registry->RegisterStringPref(prefs::kStabilityStatsVersion, std::string());
registry->RegisterInt64Pref(prefs::kStabilityStatsBuildTime, 0);
}
} // namespace metrics
|
