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platform_system_core/bootstat/bootstat.cpp
Mark Salyzyn 6290982ee3 init+bootstat: reduce last reboot reason to canonical alias 
To make parsing easier for last reboot reason.  This also ensures that
last boot reason matches the content that is typically returned by the
bootloader or in turn landed in the canonical system boot reason.

Simplify parsing in bootstat.  Adjust and fix boot_reason_test.sh for
new reality.  Allow boot reason tests battery and kernel_panic to pass
if device does not support pstore (empty before and after the test).
If device somehow landed in fastboot mode while waiting for the
display, issue a fastboot reboot to move the test along.  Some cleanup
and standardization changes to the test script.

Test: system/core/bootstat/boot_reason_test.sh
Bug: 63736262
Change-Id: I97d5467c0b4a6d65df3525f1a2d0051db813d5ad
2017-10-10 09:37:59 -07:00

910 lines
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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// The bootstat command provides options to persist boot events with the current
// timestamp, dump the persisted events, and log all events to EventLog to be
// uploaded to Android log storage via Tron.
#include <getopt.h>
#include <sys/klog.h>
#include <unistd.h>
#include <chrono>
#include <cmath>
#include <cstddef>
#include <cstdio>
#include <ctime>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include <android-base/chrono_utils.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android/log.h>
#include <cutils/android_reboot.h>
#include <cutils/properties.h>
#include <log/logcat.h>
#include <metricslogger/metrics_logger.h>
#include "boot_event_record_store.h"
namespace {
// Scans the boot event record store for record files and logs each boot event
// via EventLog.
void LogBootEvents() {
BootEventRecordStore boot_event_store;
auto events = boot_event_store.GetAllBootEvents();
for (auto i = events.cbegin(); i != events.cend(); ++i) {
android::metricslogger::LogHistogram(i->first, i->second);
}
}
// Records the named boot |event| to the record store. If |value| is non-empty
// and is a proper string representation of an integer value, the converted
// integer value is associated with the boot event.
void RecordBootEventFromCommandLine(const std::string& event, const std::string& value_str) {
BootEventRecordStore boot_event_store;
if (!value_str.empty()) {
int32_t value = 0;
if (android::base::ParseInt(value_str, &value)) {
boot_event_store.AddBootEventWithValue(event, value);
}
} else {
boot_event_store.AddBootEvent(event);
}
}
void PrintBootEvents() {
printf("Boot events:\n");
printf("------------\n");
BootEventRecordStore boot_event_store;
auto events = boot_event_store.GetAllBootEvents();
for (auto i = events.cbegin(); i != events.cend(); ++i) {
printf("%s\t%d\n", i->first.c_str(), i->second);
}
}
void ShowHelp(const char* cmd) {
fprintf(stderr, "Usage: %s [options]\n", cmd);
fprintf(stderr,
"options include:\n"
" -h, --help Show this help\n"
" -l, --log Log all metrics to logstorage\n"
" -p, --print Dump the boot event records to the console\n"
" -r, --record Record the timestamp of a named boot event\n"
" --value Optional value to associate with the boot event\n"
" --record_boot_complete Record metrics related to the time for the device boot\n"
" --record_boot_reason Record the reason why the device booted\n"
" --record_time_since_factory_reset Record the time since the device was reset\n");
}
// Constructs a readable, printable string from the givencommand line
// arguments.
std::string GetCommandLine(int argc, char** argv) {
std::string cmd;
for (int i = 0; i < argc; ++i) {
cmd += argv[i];
cmd += " ";
}
return cmd;
}
// Convenience wrapper over the property API that returns an
// std::string.
std::string GetProperty(const char* key) {
std::vector<char> temp(PROPERTY_VALUE_MAX);
const int len = property_get(key, &temp[0], nullptr);
if (len < 0) {
return "";
}
return std::string(&temp[0], len);
}
void SetProperty(const char* key, const std::string& val) {
property_set(key, val.c_str());
}
void SetProperty(const char* key, const char* val) {
property_set(key, val);
}
constexpr int32_t kUnknownBootReason = 1;
// A mapping from boot reason string, as read from the ro.boot.bootreason
// system property, to a unique integer ID. Viewers of log data dashboards for
// the boot_reason metric may refer to this mapping to discern the histogram
// values.
const std::map<std::string, int32_t> kBootReasonMap = {
{"unknown", kUnknownBootReason},
{"normal", 2},
{"recovery", 3},
{"reboot", 4},
{"PowerKey", 5},
{"hard_reset", 6},
{"kernel_panic", 7},
{"rpm_err", 8},
{"hw_reset", 9},
{"tz_err", 10},
{"adsp_err", 11},
{"modem_err", 12},
{"mba_err", 13},
{"Watchdog", 14},
{"Panic", 15},
{"power_key", 16},
{"power_on", 17},
{"Reboot", 18},
{"rtc", 19},
{"edl", 20},
{"oem_pon1", 21},
{"oem_powerkey", 22},
{"oem_unknown_reset", 23},
{"srto: HWWDT reset SC", 24},
{"srto: HWWDT reset platform", 25},
{"srto: bootloader", 26},
{"srto: kernel panic", 27},
{"srto: kernel watchdog reset", 28},
{"srto: normal", 29},
{"srto: reboot", 30},
{"srto: reboot-bootloader", 31},
{"srto: security watchdog reset", 32},
{"srto: wakesrc", 33},
{"srto: watchdog", 34},
{"srto:1-1", 35},
{"srto:omap_hsmm", 36},
{"srto:phy0", 37},
{"srto:rtc0", 38},
{"srto:touchpad", 39},
{"watchdog", 40},
{"watchdogr", 41},
{"wdog_bark", 42},
{"wdog_bite", 43},
{"wdog_reset", 44},
{"shutdown,", 45}, // Trailing comma is intentional.
{"shutdown,userrequested", 46},
{"reboot,bootloader", 47},
{"reboot,cold", 48},
{"reboot,recovery", 49},
{"thermal_shutdown", 50},
{"s3_wakeup", 51},
{"kernel_panic,sysrq", 52},
{"kernel_panic,NULL", 53},
{"kernel_panic,BUG", 54},
{"bootloader", 55},
{"cold", 56},
{"hard", 57},
{"warm", 58},
{"recovery", 59},
{"thermal-shutdown", 60},
{"shutdown,thermal", 61},
{"shutdown,battery", 62},
{"reboot,ota", 63},
{"reboot,factory_reset", 64},
{"reboot,", 65},
{"reboot,shell", 66},
{"reboot,adb", 67},
{"reboot,userrequested", 68},
{"shutdown,container", 69}, // Host OS asking Android Container to shutdown
};
// Converts a string value representing the reason the system booted to an
// integer representation. This is necessary for logging the boot_reason metric
// via Tron, which does not accept non-integer buckets in histograms.
int32_t BootReasonStrToEnum(const std::string& boot_reason) {
auto mapping = kBootReasonMap.find(boot_reason);
if (mapping != kBootReasonMap.end()) {
return mapping->second;
}
LOG(INFO) << "Unknown boot reason: " << boot_reason;
return kUnknownBootReason;
}
// Canonical list of supported primary reboot reasons.
const std::vector<const std::string> knownReasons = {
// clang-format off
// kernel
"watchdog",
"kernel_panic",
// strong
"recovery", // Should not happen from ro.boot.bootreason
"bootloader", // Should not happen from ro.boot.bootreason
// blunt
"cold",
"hard",
"warm",
// super blunt
"shutdown", // Can not happen from ro.boot.bootreason
"reboot", // Default catch-all for anything unknown
// clang-format on
};
// Returns true if the supplied reason prefix is considered detailed enough.
bool isStrongRebootReason(const std::string& r) {
for (auto& s : knownReasons) {
if (s == "cold") break;
// Prefix defined as terminated by a nul or comma (,).
if (android::base::StartsWith(r, s.c_str()) &&
((r.length() == s.length()) || (r[s.length()] == ','))) {
return true;
}
}
return false;
}
// Returns true if the supplied reason prefix is associated with the kernel.
bool isKernelRebootReason(const std::string& r) {
for (auto& s : knownReasons) {
if (s == "recovery") break;
// Prefix defined as terminated by a nul or comma (,).
if (android::base::StartsWith(r, s.c_str()) &&
((r.length() == s.length()) || (r[s.length()] == ','))) {
return true;
}
}
return false;
}
// Returns true if the supplied reason prefix is considered known.
bool isKnownRebootReason(const std::string& r) {
for (auto& s : knownReasons) {
// Prefix defined as terminated by a nul or comma (,).
if (android::base::StartsWith(r, s.c_str()) &&
((r.length() == s.length()) || (r[s.length()] == ','))) {
return true;
}
}
return false;
}
// If the reboot reason should be improved, report true if is too blunt.
bool isBluntRebootReason(const std::string& r) {
if (isStrongRebootReason(r)) return false;
if (!isKnownRebootReason(r)) return true; // Can not support unknown as detail
size_t pos = 0;
while ((pos = r.find(',', pos)) != std::string::npos) {
++pos;
std::string next(r.substr(pos));
if (next.length() == 0) break;
if (next[0] == ',') continue;
if (!isKnownRebootReason(next)) return false; // Unknown subreason is good.
if (isStrongRebootReason(next)) return false; // eg: reboot,reboot
}
return true;
}
bool readPstoreConsole(std::string& console) {
if (android::base::ReadFileToString("/sys/fs/pstore/console-ramoops-0", &console)) {
return true;
}
return android::base::ReadFileToString("/sys/fs/pstore/console-ramoops", &console);
}
bool addKernelPanicSubReason(const std::string& console, std::string& ret) {
// Check for kernel panic types to refine information
if (console.rfind("SysRq : Trigger a crash") != std::string::npos) {
// Can not happen, except on userdebug, during testing/debugging.
ret = "kernel_panic,sysrq";
return true;
}
if (console.rfind("Unable to handle kernel NULL pointer dereference at virtual address") !=
std::string::npos) {
ret = "kernel_panic,NULL";
return true;
}
if (console.rfind("Kernel BUG at ") != std::string::npos) {
ret = "kernel_panic,BUG";
return true;
}
return false;
}
// std::transform Helper callback functions:
// Converts a string value representing the reason the system booted to a
// string complying with Android system standard reason.
char tounderline(char c) {
return ::isblank(c) ? '_' : c;
}
char toprintable(char c) {
return ::isprint(c) ? c : '?';
}
const char system_reboot_reason_property[] = "sys.boot.reason";
const char last_reboot_reason_property[] = LAST_REBOOT_REASON_PROPERTY;
const char bootloader_reboot_reason_property[] = "ro.boot.bootreason";
// Scrub, Sanitize, Standardize and Enhance the boot reason string supplied.
std::string BootReasonStrToReason(const std::string& boot_reason) {
static const size_t max_reason_length = 256;
std::string ret(GetProperty(system_reboot_reason_property));
std::string reason(boot_reason);
// If sys.boot.reason == ro.boot.bootreason, let's re-evaluate
if (reason == ret) ret = "";
// Cleanup boot_reason regarding acceptable character set
std::transform(reason.begin(), reason.end(), reason.begin(), ::tolower);
std::transform(reason.begin(), reason.end(), reason.begin(), tounderline);
std::transform(reason.begin(), reason.end(), reason.begin(), toprintable);
// Is the current system boot reason sys.boot.reason valid?
if (!isKnownRebootReason(ret)) ret = "";
if (ret == "") {
// Is the bootloader boot reason ro.boot.bootreason known?
std::vector<std::string> words(android::base::Split(reason, ",_-"));
for (auto& s : knownReasons) {
std::string blunt;
for (auto& r : words) {
if (r == s) {
if (isBluntRebootReason(s)) {
blunt = s;
} else {
ret = s;
break;
}
}
}
if (ret == "") ret = blunt;
if (ret != "") break;
}
}
if (ret == "") {
// A series of checks to take some officially unsupported reasons
// reported by the bootloader and find some logical and canonical
// sense. In an ideal world, we would require those bootloaders
// to behave and follow our standards.
static const std::vector<std::pair<const std::string, const std::string>> aliasReasons = {
{"watchdog", "wdog"},
{"cold,powerkey", "powerkey"},
{"kernel_panic", "panic"},
{"shutdown,thermal", "thermal"},
{"warm,s3_wakeup", "s3_wakeup"},
{"hard,hw_reset", "hw_reset"},
{"bootloader", ""},
};
// Either the primary or alias is found _somewhere_ in the reason string.
for (auto& s : aliasReasons) {
if (reason.find(s.first) != std::string::npos) {
ret = s.first;
break;
}
if (s.second.size() && (reason.find(s.second) != std::string::npos)) {
ret = s.first;
break;
}
}
}
// If watchdog is the reason, see if there is a security angle?
if (ret == "watchdog") {
if (reason.find("sec") != std::string::npos) {
ret += ",security";
}
}
if (ret == "kernel_panic") {
// Check to see if last klog has some refinement hints.
std::string content;
if (readPstoreConsole(content)) {
addKernelPanicSubReason(content, ret);
}
} else if (isBluntRebootReason(ret)) {
// Check the other available reason resources if the reason is still blunt.
// Check to see if last klog has some refinement hints.
std::string content;
if (readPstoreConsole(content)) {
// The toybox reboot command used directly (unlikely)? But also
// catches init's response to Android's more controlled reboot command.
if (content.rfind("reboot: Power down") != std::string::npos) {
ret = "shutdown"; // Still too blunt, but more accurate.
// ToDo: init should record the shutdown reason to kernel messages ala:
// init: shutdown system with command 'last_reboot_reason'
// so that if pstore has persistence we can get some details
// that could be missing in last_reboot_reason_property.
}
static const char cmd[] = "reboot: Restarting system with command '";
size_t pos = content.rfind(cmd);
if (pos != std::string::npos) {
pos += strlen(cmd);
std::string subReason(content.substr(pos, max_reason_length));
for (pos = 0; pos < subReason.length(); ++pos) {
char c = tounderline(subReason[pos]);
if (!::isprint(c) || (c == '\'')) {
subReason.erase(pos);
break;
}
subReason[pos] = ::tolower(c);
}
if (subReason != "") { // Will not land "reboot" as that is too blunt.
if (isKernelRebootReason(subReason)) {
ret = "reboot," + subReason; // User space can't talk kernel reasons.
} else {
ret = subReason;
}
}
}
// Check for kernel panics, allowed to override reboot command.
if (!addKernelPanicSubReason(content, ret) &&
// check for long-press power down
((content.rfind("Power held for ") != std::string::npos) ||
(content.rfind("charger: [") != std::string::npos))) {
ret = "cold";
}
}
// The following battery test should migrate to a default system health HAL
// Let us not worry if the reboot command was issued, for the cases of
// reboot -p, reboot <no reason>, reboot cold, reboot warm and reboot hard.
// Same for bootloader and ro.boot.bootreasons of this set, but a dead
// battery could conceivably lead to these, so worthy of override.
if (isBluntRebootReason(ret)) {
// Heuristic to determine if shutdown possibly because of a dead battery?
// Really a hail-mary pass to find it in last klog content ...
static const int battery_dead_threshold = 2; // percent
static const char battery[] = "healthd: battery l=";
size_t pos = content.rfind(battery); // last one
std::string digits;
if (pos != std::string::npos) {
digits = content.substr(pos + strlen(battery));
}
char* endptr = NULL;
unsigned long long level = strtoull(digits.c_str(), &endptr, 10);
if ((level <= 100) && (endptr != digits.c_str()) && (*endptr == ' ')) {
LOG(INFO) << "Battery level at shutdown " << level << "%";
if (level <= battery_dead_threshold) {
ret = "shutdown,battery";
}
} else { // Most likely
digits = ""; // reset digits
// Content buffer no longer will have console data. Beware if more
// checks added below, that depend on parsing console content.
content = "";
LOG(DEBUG) << "Can not find last low battery in last console messages";
android_logcat_context ctx = create_android_logcat();
FILE* fp = android_logcat_popen(&ctx, "logcat -b kernel -v brief -d");
if (fp != nullptr) {
android::base::ReadFdToString(fileno(fp), &content);
}
android_logcat_pclose(&ctx, fp);
android_logcat_destroy(&ctx);
static const char logcat_battery[] = "W/healthd ( 0): battery l=";
const char* match = logcat_battery;
if (content == "") {
// Service logd.klog not running, go to smaller buffer in the kernel.
int rc = klogctl(KLOG_SIZE_BUFFER, nullptr, 0);
if (rc > 0) {
ssize_t len = rc + 1024; // 1K Margin should it grow between calls.
std::unique_ptr<char[]> buf(new char[len]);
rc = klogctl(KLOG_READ_ALL, buf.get(), len);
if (rc < len) {
len = rc + 1;
}
buf[--len] = '\0';
content = buf.get();
}
match = battery;
}
pos = content.find(match); // The first one it finds.
if (pos != std::string::npos) {
digits = content.substr(pos + strlen(match));
}
endptr = NULL;
level = strtoull(digits.c_str(), &endptr, 10);
if ((level <= 100) && (endptr != digits.c_str()) && (*endptr == ' ')) {
LOG(INFO) << "Battery level at startup " << level << "%";
if (level <= battery_dead_threshold) {
ret = "shutdown,battery";
}
} else {
LOG(DEBUG) << "Can not find first battery level in dmesg or logcat";
}
}
}
// Is there a controlled shutdown hint in last_reboot_reason_property?
if (isBluntRebootReason(ret)) {
// Content buffer no longer will have console data. Beware if more
// checks added below, that depend on parsing console content.
content = GetProperty(last_reboot_reason_property);
// Cleanup last_boot_reason regarding acceptable character set
std::transform(content.begin(), content.end(), content.begin(), ::tolower);
std::transform(content.begin(), content.end(), content.begin(), tounderline);
std::transform(content.begin(), content.end(), content.begin(), toprintable);
// Anything in last is better than 'super-blunt' reboot or shutdown.
if ((ret == "") || (ret == "reboot") || (ret == "shutdown") || !isBluntRebootReason(content)) {
ret = content;
}
}
// Other System Health HAL reasons?
// ToDo: /proc/sys/kernel/boot_reason needs a HAL interface to
// possibly offer hardware-specific clues from the PMIC.
}
// If unknown left over from above, make it "reboot,<boot_reason>"
if (ret == "") {
ret = "reboot";
if (android::base::StartsWith(reason, "reboot")) {
reason = reason.substr(strlen("reboot"));
while ((reason[0] == ',') || (reason[0] == '_')) {
reason = reason.substr(1);
}
}
if (reason != "") {
ret += ",";
ret += reason;
}
}
LOG(INFO) << "Canonical boot reason: " << ret;
if (isKernelRebootReason(ret) && (GetProperty(last_reboot_reason_property) != "")) {
// Rewrite as it must be old news, kernel reasons trump user space.
SetProperty(last_reboot_reason_property, ret);
}
return ret;
}
// Returns the appropriate metric key prefix for the boot_complete metric such
// that boot metrics after a system update are labeled as ota_boot_complete;
// otherwise, they are labeled as boot_complete. This method encapsulates the
// bookkeeping required to track when a system update has occurred by storing
// the UTC timestamp of the system build date and comparing against the current
// system build date.
std::string CalculateBootCompletePrefix() {
static const std::string kBuildDateKey = "build_date";
std::string boot_complete_prefix = "boot_complete";
std::string build_date_str = GetProperty("ro.build.date.utc");
int32_t build_date;
if (!android::base::ParseInt(build_date_str, &build_date)) {
return std::string();
}
BootEventRecordStore boot_event_store;
BootEventRecordStore::BootEventRecord record;
if (!boot_event_store.GetBootEvent(kBuildDateKey, &record)) {
boot_complete_prefix = "factory_reset_" + boot_complete_prefix;
boot_event_store.AddBootEventWithValue(kBuildDateKey, build_date);
LOG(INFO) << "Canonical boot reason: reboot,factory_reset";
SetProperty(system_reboot_reason_property, "reboot,factory_reset");
} else if (build_date != record.second) {
boot_complete_prefix = "ota_" + boot_complete_prefix;
boot_event_store.AddBootEventWithValue(kBuildDateKey, build_date);
LOG(INFO) << "Canonical boot reason: reboot,ota";
SetProperty(system_reboot_reason_property, "reboot,ota");
}
return boot_complete_prefix;
}
// Records the value of a given ro.boottime.init property in milliseconds.
void RecordInitBootTimeProp(BootEventRecordStore* boot_event_store, const char* property) {
std::string value = GetProperty(property);
int32_t time_in_ms;
if (android::base::ParseInt(value, &time_in_ms)) {
boot_event_store->AddBootEventWithValue(property, time_in_ms);
}
}
// A map from bootloader timing stage to the time that stage took during boot.
typedef std::map<std::string, int32_t> BootloaderTimingMap;
// Returns a mapping from bootloader stage names to the time those stages
// took to boot.
const BootloaderTimingMap GetBootLoaderTimings() {
BootloaderTimingMap timings;
// |ro.boot.boottime| is of the form 'stage1:time1,...,stageN:timeN',
// where timeN is in milliseconds.
std::string value = GetProperty("ro.boot.boottime");
if (value.empty()) {
// ro.boot.boottime is not reported on all devices.
return BootloaderTimingMap();
}
auto stages = android::base::Split(value, ",");
for (const auto& stageTiming : stages) {
// |stageTiming| is of the form 'stage:time'.
auto stageTimingValues = android::base::Split(stageTiming, ":");
DCHECK_EQ(2U, stageTimingValues.size());
std::string stageName = stageTimingValues[0];
int32_t time_ms;
if (android::base::ParseInt(stageTimingValues[1], &time_ms)) {
timings[stageName] = time_ms;
}
}
return timings;
}
// Parses and records the set of bootloader stages and associated boot times
// from the ro.boot.boottime system property.
void RecordBootloaderTimings(BootEventRecordStore* boot_event_store,
const BootloaderTimingMap& bootloader_timings) {
int32_t total_time = 0;
for (const auto& timing : bootloader_timings) {
total_time += timing.second;
boot_event_store->AddBootEventWithValue("boottime.bootloader." + timing.first, timing.second);
}
boot_event_store->AddBootEventWithValue("boottime.bootloader.total", total_time);
}
// Records the closest estimation to the absolute device boot time, i.e.,
// from power on to boot_complete, including bootloader times.
void RecordAbsoluteBootTime(BootEventRecordStore* boot_event_store,
const BootloaderTimingMap& bootloader_timings,
std::chrono::milliseconds uptime) {
int32_t bootloader_time_ms = 0;
for (const auto& timing : bootloader_timings) {
if (timing.first.compare("SW") != 0) {
bootloader_time_ms += timing.second;
}
}
auto bootloader_duration = std::chrono::milliseconds(bootloader_time_ms);
auto absolute_total =
std::chrono::duration_cast<std::chrono::seconds>(bootloader_duration + uptime);
boot_event_store->AddBootEventWithValue("absolute_boot_time", absolute_total.count());
}
// Records several metrics related to the time it takes to boot the device,
// including disambiguating boot time on encrypted or non-encrypted devices.
void RecordBootComplete() {
BootEventRecordStore boot_event_store;
BootEventRecordStore::BootEventRecord record;
auto time_since_epoch = android::base::boot_clock::now().time_since_epoch();
auto uptime = std::chrono::duration_cast<std::chrono::seconds>(time_since_epoch);
time_t current_time_utc = time(nullptr);
if (boot_event_store.GetBootEvent("last_boot_time_utc", &record)) {
time_t last_boot_time_utc = record.second;
time_t time_since_last_boot = difftime(current_time_utc, last_boot_time_utc);
boot_event_store.AddBootEventWithValue("time_since_last_boot", time_since_last_boot);
}
boot_event_store.AddBootEventWithValue("last_boot_time_utc", current_time_utc);
// The boot_complete metric has two variants: boot_complete and
// ota_boot_complete. The latter signifies that the device is booting after
// a system update.
std::string boot_complete_prefix = CalculateBootCompletePrefix();
if (boot_complete_prefix.empty()) {
// The system is hosed because the build date property could not be read.
return;
}
// post_decrypt_time_elapsed is only logged on encrypted devices.
if (boot_event_store.GetBootEvent("post_decrypt_time_elapsed", &record)) {
// Log the amount of time elapsed until the device is decrypted, which
// includes the variable amount of time the user takes to enter the
// decryption password.
boot_event_store.AddBootEventWithValue("boot_decryption_complete", uptime.count());
// Subtract the decryption time to normalize the boot cycle timing.
std::chrono::seconds boot_complete = std::chrono::seconds(uptime.count() - record.second);
boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_post_decrypt",
boot_complete.count());
} else {
boot_event_store.AddBootEventWithValue(boot_complete_prefix + "_no_encryption", uptime.count());
}
// Record the total time from device startup to boot complete, regardless of
// encryption state.
boot_event_store.AddBootEventWithValue(boot_complete_prefix, uptime.count());
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.selinux");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.cold_boot_wait");
const BootloaderTimingMap bootloader_timings = GetBootLoaderTimings();
RecordBootloaderTimings(&boot_event_store, bootloader_timings);
auto uptime_ms = std::chrono::duration_cast<std::chrono::milliseconds>(time_since_epoch);
RecordAbsoluteBootTime(&boot_event_store, bootloader_timings, uptime_ms);
}
// Records the boot_reason metric by querying the ro.boot.bootreason system
// property.
void RecordBootReason() {
const std::string reason(GetProperty(bootloader_reboot_reason_property));
android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
android::metricslogger::FIELD_PLATFORM_REASON, reason);
// Log the raw bootloader_boot_reason property value.
int32_t boot_reason = BootReasonStrToEnum(reason);
BootEventRecordStore boot_event_store;
boot_event_store.AddBootEventWithValue("boot_reason", boot_reason);
// Log the scrubbed system_boot_reason.
const std::string system_reason(BootReasonStrToReason(reason));
int32_t system_boot_reason = BootReasonStrToEnum(system_reason);
boot_event_store.AddBootEventWithValue("system_boot_reason", system_boot_reason);
// Record the scrubbed system_boot_reason to the property
SetProperty(system_reboot_reason_property, system_reason);
if (reason == "") {
SetProperty(bootloader_reboot_reason_property, system_reason);
}
}
// Records two metrics related to the user resetting a device: the time at
// which the device is reset, and the time since the user last reset the
// device. The former is only set once per-factory reset.
void RecordFactoryReset() {
BootEventRecordStore boot_event_store;
BootEventRecordStore::BootEventRecord record;
time_t current_time_utc = time(nullptr);
if (current_time_utc < 0) {
// UMA does not display negative values in buckets, so convert to positive.
android::metricslogger::LogHistogram("factory_reset_current_time_failure",
std::abs(current_time_utc));
// Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
// is losing records somehow.
boot_event_store.AddBootEventWithValue("factory_reset_current_time_failure",
std::abs(current_time_utc));
return;
} else {
android::metricslogger::LogHistogram("factory_reset_current_time", current_time_utc);
// Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
// is losing records somehow.
boot_event_store.AddBootEventWithValue("factory_reset_current_time", current_time_utc);
}
// The factory_reset boot event does not exist after the device is reset, so
// use this signal to mark the time of the factory reset.
if (!boot_event_store.GetBootEvent("factory_reset", &record)) {
boot_event_store.AddBootEventWithValue("factory_reset", current_time_utc);
// Don't log the time_since_factory_reset until some time has elapsed.
// The data is not meaningful yet and skews the histogram buckets.
return;
}
// Calculate and record the difference in time between now and the
// factory_reset time.
time_t factory_reset_utc = record.second;
android::metricslogger::LogHistogram("factory_reset_record_value", factory_reset_utc);
// Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
// is losing records somehow.
boot_event_store.AddBootEventWithValue("factory_reset_record_value", factory_reset_utc);
time_t time_since_factory_reset = difftime(current_time_utc, factory_reset_utc);
boot_event_store.AddBootEventWithValue("time_since_factory_reset", time_since_factory_reset);
}
} // namespace
int main(int argc, char** argv) {
android::base::InitLogging(argv);
const std::string cmd_line = GetCommandLine(argc, argv);
LOG(INFO) << "Service started: " << cmd_line;
int option_index = 0;
static const char value_str[] = "value";
static const char boot_complete_str[] = "record_boot_complete";
static const char boot_reason_str[] = "record_boot_reason";
static const char factory_reset_str[] = "record_time_since_factory_reset";
static const struct option long_options[] = {
// clang-format off
{ "help", no_argument, NULL, 'h' },
{ "log", no_argument, NULL, 'l' },
{ "print", no_argument, NULL, 'p' },
{ "record", required_argument, NULL, 'r' },
{ value_str, required_argument, NULL, 0 },
{ boot_complete_str, no_argument, NULL, 0 },
{ boot_reason_str, no_argument, NULL, 0 },
{ factory_reset_str, no_argument, NULL, 0 },
{ NULL, 0, NULL, 0 }
// clang-format on
};
std::string boot_event;
std::string value;
int opt = 0;
while ((opt = getopt_long(argc, argv, "hlpr:", long_options, &option_index)) != -1) {
switch (opt) {
// This case handles long options which have no single-character mapping.
case 0: {
const std::string option_name = long_options[option_index].name;
if (option_name == value_str) {
// |optarg| is an external variable set by getopt representing
// the option argument.
value = optarg;
} else if (option_name == boot_complete_str) {
RecordBootComplete();
} else if (option_name == boot_reason_str) {
RecordBootReason();
} else if (option_name == factory_reset_str) {
RecordFactoryReset();
} else {
LOG(ERROR) << "Invalid option: " << option_name;
}
break;
}
case 'h': {
ShowHelp(argv[0]);
break;
}
case 'l': {
LogBootEvents();
break;
}
case 'p': {
PrintBootEvents();
break;
}
case 'r': {
// |optarg| is an external variable set by getopt representing
// the option argument.
boot_event = optarg;
break;
}
default: {
DCHECK_EQ(opt, '?');
// |optopt| is an external variable set by getopt representing
// the value of the invalid option.
LOG(ERROR) << "Invalid option: " << optopt;
ShowHelp(argv[0]);
return EXIT_FAILURE;
}
}
}
if (!boot_event.empty()) {
RecordBootEventFromCommandLine(boot_event, value);
}
return 0;
}
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