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platform_system_core/bootstat/bootstat.cpp
Nikita Ioffe 49062f3b72 Improve logging in bootstat. 
This should help in debugging issues related to the mismatch between
actual last reboot reason property and the expected one (see attached
bug).

Test: adb reboot
Test: adb logcat | grep bootstat
Bug: 152900920
Change-Id: I085cf1fb80a30389fd3ba821d40b6111a3294d95
2020-04-02 13:03:21 +01:00

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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 <iterator>
#include <map>
#include <memory>
#include <regex>
#include <string>
#include <string_view>
#include <unordered_map>
#include <utility>
#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/properties.h>
#include <android-base/strings.h>
#include <android/log.h>
#include <cutils/android_reboot.h>
#include <cutils/properties.h>
#include <statslog.h>
#include "boot_event_record_store.h"
namespace {
struct AtomInfo {
int32_t atom;
int32_t event;
};
// Maps BootEvent used inside bootstat into statsd atom defined in
// frameworks/base/cmds/statsd/src/atoms.proto.
const std::unordered_map<std::string_view, AtomInfo> kBootEventToAtomInfo = {
// ELAPSED_TIME
{"ro.boottime.init",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__ANDROID_INIT_STAGE_1}},
{"boot_complete",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE}},
{"boot_decryption_complete",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_ENCRYPTION}},
{"boot_complete_no_encryption",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_NO_ENCRYPTION}},
{"boot_complete_post_decrypt",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_POST_DECRYPT}},
{"factory_reset_boot_complete",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE}},
{"factory_reset_boot_complete_no_encryption",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::
BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE_NO_ENCRYPTION}},
{"factory_reset_boot_complete_post_decrypt",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::
BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE_POST_DECRYPT}},
{"ota_boot_complete",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE}},
{"ota_boot_complete_no_encryption",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE_NO_ENCRYPTION}},
{"ota_boot_complete_post_decrypt",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE_POST_DECRYPT}},
{"post_decrypt_time_elapsed",
{android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__POST_DECRYPT}},
// DURATION
{"absolute_boot_time",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__ABSOLUTE_BOOT_TIME}},
{"boottime.bootloader.1BLE",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_FIRST_STAGE_EXEC}},
{"boottime.bootloader.1BLL",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_FIRST_STAGE_LOAD}},
{"boottime.bootloader.KL",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_KERNEL_LOAD}},
{"boottime.bootloader.2BLE",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_SECOND_STAGE_EXEC}},
{"boottime.bootloader.2BLL",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_SECOND_STAGE_LOAD}},
{"boottime.bootloader.SW",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_UI_WAIT}},
{"boottime.bootloader.total",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_TOTAL}},
{"boottime.init.cold_boot_wait",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__COLDBOOT_WAIT}},
{"time_since_factory_reset",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__FACTORY_RESET_TIME_SINCE_RESET}},
{"ro.boottime.init.first_stage",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__ANDROID_INIT_STAGE_1}},
{"ro.boottime.init.selinux",
{android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
android::util::BOOT_TIME_EVENT_DURATION__EVENT__SELINUX_INIT}},
// UTC_TIME
{"factory_reset",
{android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RESET_TIME}},
{"factory_reset_current_time",
{android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_CURRENT_TIME}},
{"factory_reset_record_value",
{android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RECORD_VALUE}},
// ERROR_CODE
{"factory_reset_current_time_failure",
{android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED,
android::util::BOOT_TIME_EVENT_ERROR_CODE__EVENT__FACTORY_RESET_CURRENT_TIME_FAILURE}},
};
// 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();
std::vector<std::string_view> notSupportedEvents;
for (const auto& event : events) {
const auto& name = event.first;
const auto& info = kBootEventToAtomInfo.find(name);
if (info != kBootEventToAtomInfo.end()) {
if (info->second.atom == android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED) {
android::util::stats_write(static_cast<int32_t>(info->second.atom),
static_cast<int32_t>(info->second.event),
static_cast<int32_t>(event.second));
} else {
android::util::stats_write(static_cast<int32_t>(info->second.atom),
static_cast<int32_t>(info->second.event),
static_cast<int64_t>(event.second));
}
} else {
notSupportedEvents.push_back(name);
}
}
if (!notSupportedEvents.empty()) {
LOG(WARNING) << "LogBootEvents, atomInfo not defined for events:"
<< android::base::Join(notSupportedEvents, ',');
}
}
// 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"
" --boot_reason_enum=<reason> Report the match to the kBootReasonMap table\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;
}
constexpr int32_t kEmptyBootReason = 0;
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. Regex matching, to manage the scale, as a minimum require either
// [, \ or * to be present in the string to switch to checking.
const std::map<std::string, int32_t> kBootReasonMap = {
{"reboot,[empty]", kEmptyBootReason},
{"__BOOTSTAT_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}, // aliasReasons to cold,powerkey (Mediatek)
{"power_on", 17}, // aliasReasons to cold,powerkey
{"Reboot", 18},
{"rtc", 19},
{"edl", 20},
{"oem_pon1", 21},
{"oem_powerkey", 22}, // aliasReasons to cold,powerkey
{"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. Do NOT use.
{"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,null", 53},
{"kernel_panic,BUG", 54},
{"kernel_panic,bug", 54},
{"bootloader", 55},
{"cold", 56},
{"hard", 57},
{"warm", 58},
{"reboot,kernel_power_off_charging__reboot_system", 59}, // Can not happen
{"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
{"cold,powerkey", 70},
{"warm,s3_wakeup", 71},
{"hard,hw_reset", 72},
{"shutdown,suspend", 73}, // Suspend to RAM
{"shutdown,hibernate", 74}, // Suspend to DISK
{"power_on_key", 75}, // aliasReasons to cold,powerkey
{"reboot_by_key", 76}, // translated to reboot,by_key
{"wdt_by_pass_pwk", 77}, // Mediatek
{"reboot_longkey", 78}, // translated to reboot,longkey
{"powerkey", 79}, // aliasReasons to cold,powerkey
{"usb", 80}, // aliasReasons to cold,charger (Mediatek)
{"wdt", 81}, // Mediatek
{"tool_by_pass_pwk", 82}, // aliasReasons to reboot,tool (Mediatek)
{"2sec_reboot", 83}, // aliasReasons to cold,rtc,2sec (Mediatek)
{"reboot,by_key", 84},
{"reboot,longkey", 85},
{"reboot,2sec", 86}, // Deprecate in two years, replaced with cold,rtc,2sec
{"shutdown,thermal,battery", 87},
{"reboot,its_just_so_hard", 88}, // produced by boot_reason_test
{"reboot,Its Just So Hard", 89}, // produced by boot_reason_test
{"reboot,rescueparty", 90},
{"charge", 91},
{"oem_tz_crash", 92},
{"uvlo", 93}, // aliasReasons to reboot,undervoltage
{"oem_ps_hold", 94},
{"abnormal_reset", 95},
{"oemerr_unknown", 96},
{"reboot_fastboot_mode", 97},
{"watchdog_apps_bite", 98},
{"xpu_err", 99},
{"power_on_usb", 100}, // aliasReasons to cold,charger
{"watchdog_rpm", 101},
{"watchdog_nonsec", 102},
{"watchdog_apps_bark", 103},
{"reboot_dmverity_corrupted", 104},
{"reboot_smpl", 105}, // aliasReasons to reboot,powerloss
{"watchdog_sdi_apps_reset", 106},
{"smpl", 107}, // aliasReasons to reboot,powerloss
{"oem_modem_failed_to_powerup", 108},
{"reboot_normal", 109},
{"oem_lpass_cfg", 110},
{"oem_xpu_ns_error", 111},
{"power_key_press", 112}, // aliasReasons to cold,powerkey
{"hardware_reset", 113},
{"reboot_by_powerkey", 114}, // aliasReasons to cold,powerkey (is this correct?)
{"reboot_verity", 115},
{"oem_rpm_undef_error", 116},
{"oem_crash_on_the_lk", 117},
{"oem_rpm_reset", 118},
{"reboot,powerloss", 119},
{"reboot,undervoltage", 120},
{"factory_cable", 121},
{"oem_ar6320_failed_to_powerup", 122},
{"watchdog_rpm_bite", 123},
{"power_on_cable", 124}, // aliasReasons to cold,charger
{"reboot_unknown", 125},
{"wireless_charger", 126},
{"0x776655ff", 127},
{"oem_thermal_bite_reset", 128},
{"charger", 129},
{"pon1", 130},
{"unknown", 131},
{"reboot_rtc", 132},
{"cold_boot", 133},
{"hard_rst", 134},
{"power-on", 135},
{"oem_adsp_resetting_the_soc", 136},
{"kpdpwr", 137},
{"oem_modem_timeout_waiting", 138},
{"usb_chg", 139},
{"warm_reset_0x02", 140},
{"warm_reset_0x80", 141},
{"pon_reason_0xb0", 142},
{"reboot_download", 143},
{"reboot_recovery_mode", 144},
{"oem_sdi_err_fatal", 145},
{"pmic_watchdog", 146},
{"software_master", 147},
{"cold,charger", 148},
{"cold,rtc", 149},
{"cold,rtc,2sec", 150}, // Mediatek
{"reboot,tool", 151}, // Mediatek
{"reboot,wdt", 152}, // Mediatek
{"reboot,unknown", 153}, // Mediatek
{"kernel_panic,audit", 154},
{"kernel_panic,atomic", 155},
{"kernel_panic,hung", 156},
{"kernel_panic,hung,rcu", 157},
{"kernel_panic,init", 158},
{"kernel_panic,oom", 159},
{"kernel_panic,stack", 160},
{"kernel_panic,sysrq,livelock,alarm", 161}, // llkd
{"kernel_panic,sysrq,livelock,driver", 162}, // llkd
{"kernel_panic,sysrq,livelock,zombie", 163}, // llkd
{"kernel_panic,modem", 164},
{"kernel_panic,adsp", 165},
{"kernel_panic,dsps", 166},
{"kernel_panic,wcnss", 167},
{"kernel_panic,_sde_encoder_phys_cmd_handle_ppdone_timeout", 168},
{"recovery,quiescent", 169},
{"reboot,quiescent", 170},
{"reboot,rtc", 171},
{"reboot,dm-verity_device_corrupted", 172},
{"reboot,dm-verity_enforcing", 173},
{"reboot,keys_clear", 174},
{"reboot,pmic_off_fault,.*", 175},
{"reboot,pmic_off_s3rst,.*", 176},
{"reboot,pmic_off_other,.*", 177},
{"reboot,userrequested,fastboot", 178},
{"reboot,userrequested,recovery", 179},
{"reboot,userrequested,recovery,ui", 180},
{"shutdown,userrequested,fastboot", 181},
{"shutdown,userrequested,recovery", 182},
{"reboot,unknown[0-9]*", 183},
{"reboot,longkey,.*", 184},
{"reboot,boringssl-self-check-failed", 185},
{"reboot,userspace_failed,shutdown_aborted", 186},
{"reboot,userspace_failed,watchdog_triggered", 187},
{"reboot,userspace_failed,watchdog_fork", 188},
{"reboot,userspace_failed,*", 189},
{"reboot,mount_userdata_failed", 190},
};
// 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;
}
if (boot_reason.empty()) {
return kEmptyBootReason;
}
for (const auto& [match, id] : kBootReasonMap) {
// Regex matches as a minimum require either [, \ or * to be present.
if (match.find_first_of("[\\*") == match.npos) continue;
// enforce match from beginning to end
auto exact = match;
if (exact[0] != '^') exact = "^" + exact;
if (exact[exact.size() - 1] != '$') exact = exact + "$";
if (std::regex_search(boot_reason, std::regex(exact))) return id;
}
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) && ((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) && ((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) && ((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);
}
// Implement a variant of std::string::rfind that is resilient to errors in
// the data stream being inspected.
class pstoreConsole {
private:
const size_t kBitErrorRate = 8; // number of bits per error
const std::string& console;
// Number of bits that differ between the two arguments l and r.
// Returns zero if the values for l and r are identical.
size_t numError(uint8_t l, uint8_t r) const { return std::bitset<8>(l ^ r).count(); }
// A string comparison function, reports the number of errors discovered
// in the match to a maximum of the bitLength / kBitErrorRate, at that
// point returning npos to indicate match is too poor.
//
// Since called in rfind which works backwards, expect cache locality will
// help if we check in reverse here as well for performance.
//
// Assumption: l (from console.c_str() + pos) is long enough to house
// _r.length(), checked in rfind caller below.
//
size_t numError(size_t pos, const std::string& _r) const {
const char* l = console.c_str() + pos;
const char* r = _r.c_str();
size_t n = _r.length();
const uint8_t* le = reinterpret_cast<const uint8_t*>(l) + n;
const uint8_t* re = reinterpret_cast<const uint8_t*>(r) + n;
size_t count = 0;
n = 0;
do {
// individual character bit error rate > threshold + slop
size_t num = numError(*--le, *--re);
if (num > ((8 + kBitErrorRate) / kBitErrorRate)) return std::string::npos;
// total bit error rate > threshold + slop
count += num;
++n;
if (count > ((n * 8 + kBitErrorRate - (n > 2)) / kBitErrorRate)) {
return std::string::npos;
}
} while (le != reinterpret_cast<const uint8_t*>(l));
return count;
}
public:
explicit pstoreConsole(const std::string& console) : console(console) {}
// scope of argument must be equal to or greater than scope of pstoreConsole
explicit pstoreConsole(const std::string&& console) = delete;
explicit pstoreConsole(std::string&& console) = delete;
// Our implementation of rfind, use exact match first, then resort to fuzzy.
size_t rfind(const std::string& needle) const {
size_t pos = console.rfind(needle); // exact match?
if (pos != std::string::npos) return pos;
// Check to make sure needle fits in console string.
pos = console.length();
if (needle.length() > pos) return std::string::npos;
pos -= needle.length();
// fuzzy match to maximum kBitErrorRate
for (;;) {
if (numError(pos, needle) != std::string::npos) return pos;
if (pos == 0) break;
--pos;
}
return std::string::npos;
}
// Our implementation of find, use only fuzzy match.
size_t find(const std::string& needle, size_t start = 0) const {
// Check to make sure needle fits in console string.
if (needle.length() > console.length()) return std::string::npos;
const size_t last_pos = console.length() - needle.length();
// fuzzy match to maximum kBitErrorRate
for (size_t pos = start; pos <= last_pos; ++pos) {
if (numError(pos, needle) != std::string::npos) return pos;
}
return std::string::npos;
}
operator const std::string&() const { return console; }
};
// If bit error match to needle, correct it.
// Return true if any corrections were discovered and applied.
bool correctForBitError(std::string& reason, const std::string& needle) {
bool corrected = false;
if (reason.length() < needle.length()) return corrected;
const pstoreConsole console(reason);
const size_t last_pos = reason.length() - needle.length();
for (size_t pos = 0; pos <= last_pos; pos += needle.length()) {
pos = console.find(needle, pos);
if (pos == std::string::npos) break;
// exact match has no malice
if (needle == reason.substr(pos, needle.length())) continue;
corrected = true;
reason = reason.substr(0, pos) + needle + reason.substr(pos + needle.length());
}
return corrected;
}
// If bit error match to needle, correct it.
// Return true if any corrections were discovered and applied.
// Try again if we can replace underline with spaces.
bool correctForBitErrorOrUnderline(std::string& reason, const std::string& needle) {
bool corrected = correctForBitError(reason, needle);
std::string _needle(needle);
std::transform(_needle.begin(), _needle.end(), _needle.begin(),
[](char c) { return (c == '_') ? ' ' : c; });
if (needle != _needle) {
corrected |= correctForBitError(reason, _needle);
}
return corrected;
}
// Converts a string value representing the reason the system booted to a
// string complying with Android system standard reason.
void transformReason(std::string& reason) {
std::transform(reason.begin(), reason.end(), reason.begin(), ::tolower);
std::transform(reason.begin(), reason.end(), reason.begin(),
[](char c) { return ::isblank(c) ? '_' : c; });
std::transform(reason.begin(), reason.end(), reason.begin(),
[](char c) { return ::isprint(c) ? c : '?'; });
}
// Check subreasons for reboot,<subreason> kernel_panic,sysrq,<subreason> or
// kernel_panic,<subreason>.
//
// If quoted flag is set, pull out and correct single quoted ('), newline (\n)
// or unprintable character terminated subreason, pos is supplied just beyond
// first quote. if quoted false, pull out and correct newline (\n) or
// unprintable character terminated subreason.
//
// Heuristics to find termination is painted into a corner:
// single bit error for quote ' that we can block. It is acceptable for
// the others 7, g in reason. 2/9 chance will miss the terminating quote,
// but there is always the terminating newline that usually immediately
// follows to fortify our chances.
bool likely_single_quote(char c) {
switch (static_cast<uint8_t>(c)) {
case '\'': // '\''
case '\'' ^ 0x01: // '&'
case '\'' ^ 0x02: // '%'
case '\'' ^ 0x04: // '#'
case '\'' ^ 0x08: // '/'
return true;
case '\'' ^ 0x10: // '7'
break;
case '\'' ^ 0x20: // '\a' (unprintable)
return true;
case '\'' ^ 0x40: // 'g'
break;
case '\'' ^ 0x80: // 0xA7 (unprintable)
return true;
}
return false;
}
// ::isprint(c) and likely_space() will prevent us from being called for
// fundamentally printable entries, except for '\r' and '\b'.
//
// Except for * and J, single bit errors for \n, all others are non-
// printable so easy catch. It is _acceptable_ for *, J or j to exist in
// the reason string, so 2/9 chance we will miss the terminating newline.
//
// NB: J might not be acceptable, except if at the beginning or preceded
// with a space, '(' or any of the quotes and their BER aliases.
// NB: * might not be acceptable, except if at the beginning or preceded
// with a space, another *, or any of the quotes or their BER aliases.
//
// To reduce the chances to closer to 1/9 is too complicated for the gain.
bool likely_newline(char c) {
switch (static_cast<uint8_t>(c)) {
case '\n': // '\n' (unprintable)
case '\n' ^ 0x01: // '\r' (unprintable)
case '\n' ^ 0x02: // '\b' (unprintable)
case '\n' ^ 0x04: // 0x0E (unprintable)
case '\n' ^ 0x08: // 0x02 (unprintable)
case '\n' ^ 0x10: // 0x1A (unprintable)
return true;
case '\n' ^ 0x20: // '*'
case '\n' ^ 0x40: // 'J'
break;
case '\n' ^ 0x80: // 0x8A (unprintable)
return true;
}
return false;
}
// ::isprint(c) will prevent us from being called for all the printable
// matches below. If we let unprintables through because of this, they
// get converted to underscore (_) by the validation phase.
bool likely_space(char c) {
switch (static_cast<uint8_t>(c)) {
case ' ': // ' '
case ' ' ^ 0x01: // '!'
case ' ' ^ 0x02: // '"'
case ' ' ^ 0x04: // '$'
case ' ' ^ 0x08: // '('
case ' ' ^ 0x10: // '0'
case ' ' ^ 0x20: // '\0' (unprintable)
case ' ' ^ 0x40: // 'P'
case ' ' ^ 0x80: // 0xA0 (unprintable)
case '\t': // '\t'
case '\t' ^ 0x01: // '\b' (unprintable) (likely_newline counters)
case '\t' ^ 0x02: // '\v' (unprintable)
case '\t' ^ 0x04: // '\r' (unprintable) (likely_newline counters)
case '\t' ^ 0x08: // 0x01 (unprintable)
case '\t' ^ 0x10: // 0x19 (unprintable)
case '\t' ^ 0x20: // ')'
case '\t' ^ 0x40: // '1'
case '\t' ^ 0x80: // 0x89 (unprintable)
return true;
}
return false;
}
std::string getSubreason(const std::string& content, size_t pos, bool quoted) {
static constexpr size_t max_reason_length = 256;
std::string subReason(content.substr(pos, max_reason_length));
// Correct against any known strings that Bit Error Match
for (const auto& s : knownReasons) {
correctForBitErrorOrUnderline(subReason, s);
}
std::string terminator(quoted ? "'" : "");
for (const auto& m : kBootReasonMap) {
if (m.first.length() <= strlen("cold")) continue; // too short?
if (correctForBitErrorOrUnderline(subReason, m.first + terminator)) continue;
if (m.first.length() <= strlen("reboot,cold")) continue; // short?
if (android::base::StartsWith(m.first, "reboot,")) {
correctForBitErrorOrUnderline(subReason, m.first.substr(strlen("reboot,")) + terminator);
} else if (android::base::StartsWith(m.first, "kernel_panic,sysrq,")) {
correctForBitErrorOrUnderline(subReason,
m.first.substr(strlen("kernel_panic,sysrq,")) + terminator);
} else if (android::base::StartsWith(m.first, "kernel_panic,")) {
correctForBitErrorOrUnderline(subReason, m.first.substr(strlen("kernel_panic,")) + terminator);
}
}
for (pos = 0; pos < subReason.length(); ++pos) {
char c = subReason[pos];
if (!(::isprint(c) || likely_space(c)) || likely_newline(c) ||
(quoted && likely_single_quote(c))) {
subReason.erase(pos);
break;
}
}
transformReason(subReason);
return subReason;
}
bool addKernelPanicSubReason(const pstoreConsole& console, std::string& ret) {
// Check for kernel panic types to refine information
if ((console.rfind("SysRq : Trigger a crash") != std::string::npos) ||
(console.rfind("PC is at sysrq_handle_crash+") != std::string::npos)) {
ret = "kernel_panic,sysrq";
// Invented for Android to allow daemons that specifically trigger sysrq
// to communicate more accurate boot subreasons via last console messages.
static constexpr char sysrqSubreason[] = "SysRq : Trigger a crash : '";
auto pos = console.rfind(sysrqSubreason);
if (pos != std::string::npos) {
ret += "," + getSubreason(console, pos + strlen(sysrqSubreason), /* quoted */ true);
}
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;
}
std::string panic("Kernel panic - not syncing: ");
auto pos = console.rfind(panic);
if (pos != std::string::npos) {
static const std::vector<std::pair<const std::string, const std::string>> panicReasons = {
{"Out of memory", "oom"},
{"out of memory", "oom"},
{"Oh boy, that early out of memory", "oom"}, // omg
{"BUG!", "bug"},
{"hung_task: blocked tasks", "hung"},
{"audit: ", "audit"},
{"scheduling while atomic", "atomic"},
{"Attempted to kill init!", "init"},
{"Requested init", "init"},
{"No working init", "init"},
{"Could not decompress init", "init"},
{"RCU Stall", "hung,rcu"},
{"stack-protector", "stack"},
{"kernel stack overflow", "stack"},
{"Corrupt kernel stack", "stack"},
{"low stack detected", "stack"},
{"corrupted stack end", "stack"},
{"subsys-restart: Resetting the SoC - modem crashed.", "modem"},
{"subsys-restart: Resetting the SoC - adsp crashed.", "adsp"},
{"subsys-restart: Resetting the SoC - dsps crashed.", "dsps"},
{"subsys-restart: Resetting the SoC - wcnss crashed.", "wcnss"},
};
ret = "kernel_panic";
for (auto& s : panicReasons) {
if (console.find(panic + s.first, pos) != std::string::npos) {
ret += "," + s.second;
return true;
}
}
auto reason = getSubreason(console, pos + panic.length(), /* newline */ false);
if (reason.length() > 3) {
ret += "," + reason;
}
return true;
}
return false;
}
bool addKernelPanicSubReason(const std::string& content, std::string& ret) {
return addKernelPanicSubReason(pstoreConsole(content), ret);
}
const char system_reboot_reason_property[] = "sys.boot.reason";
const char last_reboot_reason_property[] = LAST_REBOOT_REASON_PROPERTY;
const char last_reboot_reason_file[] = LAST_REBOOT_REASON_FILE;
const char last_last_reboot_reason_property[] = "sys.boot.reason.last";
constexpr size_t history_reboot_reason_size = 4;
const char history_reboot_reason_property[] = LAST_REBOOT_REASON_PROPERTY ".history";
const char bootloader_reboot_reason_property[] = "ro.boot.bootreason";
// Land system_boot_reason into system_reboot_reason_property.
// Shift system_boot_reason into history_reboot_reason_property.
void BootReasonAddToHistory(const std::string& system_boot_reason) {
if (system_boot_reason.empty()) return;
LOG(INFO) << "Canonical boot reason: " << system_boot_reason;
auto old_system_boot_reason = android::base::GetProperty(system_reboot_reason_property, "");
if (!android::base::SetProperty(system_reboot_reason_property, system_boot_reason)) {
android::base::SetProperty(system_reboot_reason_property,
system_boot_reason.substr(0, PROPERTY_VALUE_MAX - 1));
}
auto reason_history =
android::base::Split(android::base::GetProperty(history_reboot_reason_property, ""), "\n");
static auto mark = time(nullptr);
auto mark_str = std::string(",") + std::to_string(mark);
auto marked_system_boot_reason = system_boot_reason + mark_str;
if (!reason_history.empty()) {
// delete any entries that we just wrote in a previous
// call and leveraging duplicate line handling
auto last = old_system_boot_reason + mark_str;
// trim the list to (history_reboot_reason_size - 1)
ssize_t max = history_reboot_reason_size;
for (auto it = reason_history.begin(); it != reason_history.end();) {
if (it->empty() || (last == *it) || (marked_system_boot_reason == *it) || (--max <= 0)) {
it = reason_history.erase(it);
} else {
last = *it;
++it;
}
}
}
// insert at the front, concatenating mark (<epoch time>) detail to the value.
reason_history.insert(reason_history.begin(), marked_system_boot_reason);
// If the property string is too long ( > PROPERTY_VALUE_MAX)
// we get an error, so trim out last entry and try again.
while (!android::base::SetProperty(history_reboot_reason_property,
android::base::Join(reason_history, '\n'))) {
auto it = std::prev(reason_history.end());
if (it == reason_history.end()) break;
reason_history.erase(it);
}
}
// Scrub, Sanitize, Standardize and Enhance the boot reason string supplied.
std::string BootReasonStrToReason(const std::string& boot_reason) {
auto ret = android::base::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 = "";
transformReason(reason);
// 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 CTS standards.
//
// first member is the output
// second member is an unanchored regex for an alias
//
// If output has a prefix of <bang> '!', we do not use it as a
// match needle (and drop the <bang> prefix when landing in output),
// otherwise look for it as well. This helps keep the scale of the
// following table smaller.
static const std::vector<std::pair<const std::string, const std::string>> aliasReasons = {
{"watchdog", "wdog"},
{"kernel_panic", "panic"},
{"shutdown,thermal", "thermal"},
{"warm,s3_wakeup", "s3_wakeup"},
{"hard,hw_reset", "hw_reset"},
{"cold,charger", "usb|power_on_cable"},
{"cold,powerkey", "powerkey|power_key|PowerKey|power_on"},
{"cold,rtc", "rtc"},
{"cold,rtc,2sec", "2sec_reboot"},
{"!warm", "wdt_by_pass_pwk"}, // change flavour of blunt
{"!reboot", "^wdt$"}, // change flavour of blunt
{"reboot,tool", "tool_by_pass_pwk"},
{"!reboot,longkey", "reboot_longkey"},
{"!reboot,longkey", "kpdpwr"},
{"!reboot,undervoltage", "uvlo"},
{"!reboot,powerloss", "smpl"},
{"bootloader", ""},
};
for (auto& s : aliasReasons) {
size_t firstHasNot = s.first[0] == '!';
if (!firstHasNot && (reason.find(s.first) != std::string::npos)) {
ret = s.first;
break;
}
if (s.second.size() && std::regex_search(reason, std::regex(s.second))) {
ret = s.first.substr(firstHasNot);
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)) {
const pstoreConsole console(content);
// The toybox reboot command used directly (unlikely)? But also
// catches init's response to Android's more controlled reboot command.
if (console.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 = console.rfind(cmd);
if (pos != std::string::npos) {
std::string subReason(getSubreason(content, pos + strlen(cmd), /* quoted */ true));
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 if (isKnownRebootReason(subReason)) {
ret = subReason;
} else {
ret = "reboot," + subReason; // legitimize unknown reasons
}
}
// Some bootloaders shutdown results record in last kernel message.
if (!strcmp(ret.c_str(), "reboot,kernel_power_off_charging__reboot_system")) {
ret = "shutdown";
}
}
// Check for kernel panics, allowed to override reboot command.
if (!addKernelPanicSubReason(console, ret) &&
// check for long-press power down
((console.rfind("Power held for ") != std::string::npos) ||
(console.rfind("charger: [") != std::string::npos))) {
ret = "cold";
}
}
// TODO: use the HAL to get battery level (http://b/77725702).
// 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.
if (!android::base::ReadFileToString(last_reboot_reason_file, &content)) {
content = android::base::GetProperty(last_reboot_reason_property, "");
}
transformReason(content);
// 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;
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";
auto build_date_str = android::base::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);
BootReasonAddToHistory("reboot,factory_reset");
} else if (build_date != record.second) {
boot_complete_prefix = "ota_" + boot_complete_prefix;
boot_event_store.AddBootEventWithValue(kBuildDateKey, build_date);
BootReasonAddToHistory("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) {
auto value = android::base::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.
auto value = android::base::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());
if (stageTimingValues.size() < 2) continue;
std::string stageName = stageTimingValues[0];
int32_t time_ms;
if (android::base::ParseInt(stageTimingValues[1], &time_ms)) {
timings[stageName] = time_ms;
}
}
return timings;
}
// Returns the total bootloader boot time from the ro.boot.boottime system property.
int32_t GetBootloaderTime(const BootloaderTimingMap& bootloader_timings) {
int32_t total_time = 0;
for (const auto& timing : bootloader_timings) {
total_time += timing.second;
}
return total_time;
}
// 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);
}
// Returns the closest estimation to the absolute device boot time, i.e.,
// from power on to boot_complete, including bootloader times.
std::chrono::milliseconds GetAbsoluteBootTime(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);
return bootloader_duration + uptime;
}
// Records the closest estimation to the absolute device boot time in seconds.
// i.e. from power on to boot_complete, including bootloader times.
void RecordAbsoluteBootTime(BootEventRecordStore* boot_event_store,
std::chrono::milliseconds absolute_total) {
auto absolute_total_sec = std::chrono::duration_cast<std::chrono::seconds>(absolute_total);
boot_event_store->AddBootEventWithValue("absolute_boot_time", absolute_total_sec.count());
}
// Logs the total boot time and reason to statsd.
void LogBootInfoToStatsd(std::chrono::milliseconds end_time,
std::chrono::milliseconds total_duration, int32_t bootloader_duration_ms,
double time_since_last_boot_sec) {
auto reason = android::base::GetProperty(bootloader_reboot_reason_property, "<EMPTY>");
auto system_reason = android::base::GetProperty(system_reboot_reason_property, "<EMPTY>");
android::util::stats_write(android::util::BOOT_SEQUENCE_REPORTED, reason.c_str(),
system_reason.c_str(), end_time.count(), total_duration.count(),
(int64_t)bootloader_duration_ms,
(int64_t)time_since_last_boot_sec * 1000);
}
void SetSystemBootReason() {
const auto bootloader_boot_reason =
android::base::GetProperty(bootloader_reboot_reason_property, "");
const std::string system_boot_reason(BootReasonStrToReason(bootloader_boot_reason));
// Record the scrubbed system_boot_reason to the property
BootReasonAddToHistory(system_boot_reason);
// Shift last_reboot_reason_property to last_last_reboot_reason_property
std::string last_boot_reason;
if (!android::base::ReadFileToString(last_reboot_reason_file, &last_boot_reason)) {
PLOG(ERROR) << "Failed to read " << last_reboot_reason_file;
last_boot_reason = android::base::GetProperty(last_reboot_reason_property, "");
LOG(INFO) << "Value of " << last_reboot_reason_property << " : " << last_boot_reason;
} else {
LOG(INFO) << "Last reboot reason read from " << last_reboot_reason_file << " : "
<< last_boot_reason << ". Last reboot reason read from "
<< last_reboot_reason_property << " : "
<< android::base::GetProperty(last_reboot_reason_property, "");
}
if (last_boot_reason.empty() || isKernelRebootReason(system_boot_reason)) {
last_boot_reason = system_boot_reason;
} else {
transformReason(last_boot_reason);
}
LOG(INFO) << "Normalized last reboot reason : " << last_boot_reason;
android::base::SetProperty(last_last_reboot_reason_property, last_boot_reason);
android::base::SetProperty(last_reboot_reason_property, "");
if (unlink(last_reboot_reason_file) != 0) {
PLOG(ERROR) << "Failed to unlink " << last_reboot_reason_file;
}
}
// Gets the boot time offset. This is useful when Android is running in a
// container, because the boot_clock is not reset when Android reboots.
std::chrono::nanoseconds GetBootTimeOffset() {
static const int64_t boottime_offset =
android::base::GetIntProperty<int64_t>("ro.boot.boottime_offset", 0);
return std::chrono::nanoseconds(boottime_offset);
}
// Returns the current uptime, accounting for any offset in the CLOCK_BOOTTIME
// clock.
android::base::boot_clock::duration GetUptime() {
return android::base::boot_clock::now().time_since_epoch() - GetBootTimeOffset();
}
// 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 uptime_ns = GetUptime();
auto uptime_s = std::chrono::duration_cast<std::chrono::seconds>(uptime_ns);
time_t current_time_utc = time(nullptr);
time_t time_since_last_boot = 0;
if (boot_event_store.GetBootEvent("last_boot_time_utc", &record)) {
time_t last_boot_time_utc = record.second;
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_s.count());
// Subtract the decryption time to normalize the boot cycle timing.
std::chrono::seconds boot_complete = std::chrono::seconds(uptime_s.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_s.count());
}
// Record the total time from device startup to boot complete, regardless of
// encryption state.
boot_event_store.AddBootEventWithValue(boot_complete_prefix, uptime_s.count());
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.first_stage");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.selinux");
RecordInitBootTimeProp(&boot_event_store, "ro.boottime.init.cold_boot_wait");
const BootloaderTimingMap bootloader_timings = GetBootLoaderTimings();
int32_t bootloader_boot_duration = GetBootloaderTime(bootloader_timings);
RecordBootloaderTimings(&boot_event_store, bootloader_timings);
auto uptime_ms = std::chrono::duration_cast<std::chrono::milliseconds>(uptime_ns);
auto absolute_boot_time = GetAbsoluteBootTime(bootloader_timings, uptime_ms);
RecordAbsoluteBootTime(&boot_event_store, absolute_boot_time);
auto boot_end_time_point = std::chrono::system_clock::now().time_since_epoch();
auto boot_end_time = std::chrono::duration_cast<std::chrono::milliseconds>(boot_end_time_point);
LogBootInfoToStatsd(boot_end_time, absolute_boot_time, bootloader_boot_duration,
time_since_last_boot);
}
// Records the boot_reason metric by querying the ro.boot.bootreason system
// property.
void RecordBootReason() {
const auto reason = android::base::GetProperty(bootloader_reboot_reason_property, "");
if (reason.empty()) {
// TODO(b/148575354): Replace with statsd.
// Log an empty boot reason value as '<EMPTY>' to ensure the value is intentional
// (and not corruption anywhere else in the reporting pipeline).
// android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
// android::metricslogger::FIELD_PLATFORM_REASON,
// "<EMPTY>");
} else {
// TODO(b/148575354): Replace with statsd.
// 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 auto system_reason = android::base::GetProperty(system_reboot_reason_property, "");
int32_t system_boot_reason = BootReasonStrToEnum(system_reason);
boot_event_store.AddBootEventWithValue("system_boot_reason", system_boot_reason);
if (reason == "") {
android::base::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.
// Logging via BootEventRecordStore.
android::util::stats_write(
static_cast<int32_t>(android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED),
static_cast<int32_t>(
android::util::BOOT_TIME_EVENT_ERROR_CODE__EVENT__FACTORY_RESET_CURRENT_TIME_FAILURE),
static_cast<int32_t>(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::util::stats_write(
static_cast<int32_t>(android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED),
static_cast<int32_t>(
android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_CURRENT_TIME),
static_cast<int64_t>(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::util::stats_write(
static_cast<int32_t>(android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED),
static_cast<int32_t>(
android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RECORD_VALUE),
static_cast<int64_t>(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);
}
// List the associated boot reason(s), if arg is nullptr then all.
void PrintBootReasonEnum(const char* arg) {
int value = -1;
if (arg != nullptr) {
value = BootReasonStrToEnum(arg);
}
for (const auto& [match, id] : kBootReasonMap) {
if ((value < 0) || (value == id)) {
printf("%u\t%s\n", id, match.c_str());
}
}
}
} // 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 system_boot_reason_str[] = "set_system_boot_reason";
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 char boot_reason_enum_str[] = "boot_reason_enum";
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 },
{ system_boot_reason_str, no_argument, NULL, 0 },
{ boot_complete_str, no_argument, NULL, 0 },
{ boot_reason_str, no_argument, NULL, 0 },
{ factory_reset_str, no_argument, NULL, 0 },
{ boot_reason_enum_str, optional_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 == system_boot_reason_str) {
SetSystemBootReason();
} 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 if (option_name == boot_reason_enum_str) {
PrintBootReasonEnum(optarg);
} 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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