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[操作系统]Android Log Tag含义


  在分析Android问题的时候重要的手段之一就是分析log,在events.log中有很多系统log,其中有些log的含义并不是很了解,下面就是从安卓源码中得到的系统log的tag。

  关于Tag的说明如下:以 “30005 am_create_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5)” 为例,

  其中:

  • 30005 :相当于是am_create_activity这个tag的索引或者标识。不会出现在events.txt中。
  • am_create_activity:TAG名字
  • 后面用()括起来的相当于是这个log的一些信息,以(User|1|5)为例,User表示信息名字,User表示UID,1表示在打印出的log中该信息的数据类型,5表示该数据的单位。

  数据类型有:

  • 1:int
  • 2:long
  • 3:string
  • 4:list
  • 5:float

  数据的单位有:

  • 1:Number of objects
  • 2:Number of bytes
  • 3:Number of milliseconds
  • 4:Number of allocations
  • 5:Id
  • 6:Percent

  所以(User|1|5)表示的意思是:这项信息表示的是User,在Linux即相当于UID,信息的数据类型为1,即int,数据的单位为5,即Id。其他的类似。

  一个实际的log如下:

10-31 17:53:38.288 1232 2211 I am_create_activity: [0,208381599,127,cn.company.photoeditor/com.android.gallery3d.filtershow.FilterShowActivity,android.intent.action.EDIT,image/*,content://media/external/images/media/4427,1],表示的含义即为:

  • 这是一个表示activity创建的log
  • 程序的UID为0
  • 要创建的该activity的TOKEN为208381599
  • 该动作所处的Task ID为127
  • 所要创建的activity组件名为 cn.company.photoeditor/com.android.gallery3d.filtershow.FilterShowActivity
  • 创建该activity消息中的action为android.intent.action.EDIT,MIME TYPE为image/*,URI为content://media/external/images/media/4427,附带的flag为1

下面是源码的中tag定义文件:

service/core/java/com/android/server/am/EventLogTags.logtags:

# See system/core/logcat/event.logtags for a description of the format of this file.option java_package com.android.server.am2719 configuration_changed (config mask|1|5)2721 cpu (total|1|6),(user|1|6),(system|1|6),(iowait|1|6),(irq|1|6),(softirq|1|6)# ActivityManagerService.systemReady() starts:3040 boot_progress_ams_ready (time|2|3)# ActivityManagerService calls enableScreenAfterBoot():3050 boot_progress_enable_screen (time|2|3)# Do not change these names without updating the checkin_events setting in# google3/googledata/wireless/android/provisioning/gservices.config !!## An activity is being finished:30001 am_finish_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Reason|3)# A task is being brought to the front of the screen:30002 am_task_to_front (User|1|5),(Task|1|5)# An existing activity is being given a new intent:30003 am_new_intent (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5)# A new task is being created:30004 am_create_task (User|1|5),(Task ID|1|5)# A new activity is being created in an existing task:30005 am_create_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5)# An activity has been resumed into the foreground but was not already running:30006 am_restart_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3)# An activity has been resumed and is now in the foreground:30007 am_resume_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3)# Application Not Responding30008 am_anr (User|1|5),(pid|1|5),(Package Name|3),(Flags|1|5),(reason|3)# Activity launch time30009 am_activity_launch_time (User|1|5),(Token|1|5),(Component Name|3),(time|2|3)# Application process bound to work30010 am_proc_bound (User|1|5),(PID|1|5),(Process Name|3)# Application process died30011 am_proc_died (User|1|5),(PID|1|5),(Process Name|3)# The Activity Manager failed to pause the given activity.30012 am_failed_to_pause (User|1|5),(Token|1|5),(Wanting to pause|3),(Currently pausing|3)# Attempting to pause the current activity30013 am_pause_activity (User|1|5),(Token|1|5),(Component Name|3)# Application process has been started30014 am_proc_start (User|1|5),(PID|1|5),(UID|1|5),(Process Name|3),(Type|3),(Component|3)# An application process has been marked as bad30015 am_proc_bad (User|1|5),(UID|1|5),(Process Name|3)# An application process that was bad is now marked as good30016 am_proc_good (User|1|5),(UID|1|5),(Process Name|3)# Reporting to applications that memory is low30017 am_low_memory (Num Processes|1|1)# An activity is being destroyed:30018 am_destroy_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3),(Reason|3)# An activity has been relaunched, resumed, and is now in the foreground:30019 am_relaunch_resume_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3)# An activity has been relaunched:30020 am_relaunch_activity (User|1|5),(Token|1|5),(Task ID|1|5),(Component Name|3)# The activity's onPause has been called.30021 am_on_paused_called (User|1|5),(Component Name|3),(Reason|3)# The activity's onResume has been called.30022 am_on_resume_called (User|1|5),(Component Name|3),(Reason|3)# Kill a process to reclaim memory.30023 am_kill (User|1|5),(PID|1|5),(Process Name|3),(OomAdj|1|5),(Reason|3)# Discard an undelivered serialized broadcast (timeout/ANR/crash)30024 am_broadcast_discard_filter (User|1|5),(Broadcast|1|5),(Action|3),(Receiver Number|1|1),(BroadcastFilter|1|5)30025 am_broadcast_discard_app (User|1|5),(Broadcast|1|5),(Action|3),(Receiver Number|1|1),(App|3)# A service is being created30030 am_create_service (User|1|5),(Service Record|1|5),(Name|3),(UID|1|5),(PID|1|5)# A service is being destroyed30031 am_destroy_service (User|1|5),(Service Record|1|5),(PID|1|5)# A process has crashed too many times, it is being cleared30032 am_process_crashed_too_much (User|1|5),(Name|3),(PID|1|5)# An unknown process is trying to attach to the activity manager30033 am_drop_process (PID|1|5)# A service has crashed too many times, it is being stopped30034 am_service_crashed_too_much (User|1|5),(Crash Count|1|1),(Component Name|3),(PID|1|5)# A service is going to be restarted after its process went away30035 am_schedule_service_restart (User|1|5),(Component Name|3),(Time|2|3)# A client was waiting for a content provider, but its process was lost30036 am_provider_lost_process (User|1|5),(Package Name|3),(UID|1|5),(Name|3)# The activity manager gave up on a new process taking too long to start30037 am_process_start_timeout (User|1|5),(PID|1|5),(UID|1|5),(Process Name|3)# Unhandled exception30039 am_crash (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Exception|3),(Message|3),(File|3),(Line|1|5)# Log.wtf() called30040 am_wtf (User|1|5),(PID|1|5),(Process Name|3),(Flags|1|5),(Tag|3),(Message|3)# User switched30041 am_switch_user (id|1|5)# Activity fully drawn time30042 am_activity_fully_drawn_time (User|1|5),(Token|1|5),(Component Name|3),(time|2|3)# Activity focused30043 am_focused_activity (User|1|5),(Component Name|3),(Reason|3)# Stack focus30044 am_focused_stack (User|1|5),(Focused Stack Id|1|5),(Last Focused Stack Id|1|5),(Reason|3)# Running pre boot receiver30045 am_pre_boot (User|1|5),(Package|3)# Report collection of global memory state30046 am_meminfo (Cached|2|2),(Free|2|2),(Zram|2|2),(Kernel|2|2),(Native|2|2)# Report collection of memory used by a process30047 am_pss (Pid|1|5),(UID|1|5),(Process Name|3),(Pss|2|2),(Uss|2|2),(SwapPss|2|2)# Attempting to stop an activity30048 am_stop_activity (User|1|5),(Token|1|5),(Component Name|3)# The activity's onStop has been called.30049 am_on_stop_called (User|1|5),(Component Name|3),(Reason|3)# Report changing memory conditions (Values are ProcessStats.ADJ_MEM_FACTOR* constants)30050 am_mem_factor (Current|1|5),(Previous|1|5)

  services/core/java/com/android/server/EventLogTags.logtags:

# See system/core/logcat/event.logtags for a description of the format of this file.option java_package com.android.server# ---------------------------# BatteryService.java# ---------------------------2722 battery_level (level|1|6),(voltage|1|1),(temperature|1|1)2723 battery_status (status|1|5),(health|1|5),(present|1|5),(plugged|1|5),(technology|3)# This is logged when battery goes from discharging to charging.# It lets us count the total amount of time between charges and the discharge level2730 battery_discharge (duration|2|3),(minLevel|1|6),(maxLevel|1|6)# ---------------------------# PowerManagerService.java# ---------------------------# This is logged when the device is being forced to sleep (typically by# the user pressing the power button).2724 power_sleep_requested (wakeLocksCleared|1|1)# This is logged when the screen on broadcast has completed2725 power_screen_broadcast_send (wakelockCount|1|1)# This is logged when the screen broadcast has completed2726 power_screen_broadcast_done (on|1|5),(broadcastDuration|2|3),(wakelockCount|1|1)# This is logged when the screen on broadcast has completed2727 power_screen_broadcast_stop (which|1|5),(wakelockCount|1|1)# This is logged when the screen is turned on or off.2728 power_screen_state (offOrOn|1|5),(becauseOfUser|1|5),(totalTouchDownTime|2|3),(touchCycles|1|1)# This is logged when the partial wake lock (keeping the device awake# regardless of whether the screen is off) is acquired or released.2729 power_partial_wake_state (releasedorAcquired|1|5),(tag|3)# The device is being asked to go into a soft sleep (typically by the ungaze gesture).# It logs the time remaining before the device would've normally gone to sleep without the request.2731 power_soft_sleep_requested (savedwaketimems|2)## Leave IDs through 2739 for more power logs (2730 used by battery_discharge above)## ---------------------------# DeviceStorageMonitorService.java# ---------------------------# The disk space free on the /data partition, in bytes2744 free_storage_changed (data|2|2)# Device low memory notification and disk space free on the /data partition, in bytes at that time2745 low_storage (data|2|2)# disk space free on the /data, /system, and /cache partitions in bytes2746 free_storage_left (data|2|2),(system|2|2),(cache|2|2)# file on cache partition was deleted2748 cache_file_deleted (path|3)# ---------------------------# NotificationManagerService.java# ---------------------------# when a NotificationManager.notify is called. status: 0=post, 1=update, 2=ignored2750 notification_enqueue (uid|1|5),(pid|1|5),(pkg|3),(id|1|5),(tag|3),(userid|1|5),(notification|3),(status|1)# when someone tries to cancel a notification, the notification manager sometimes# calls this with flags too2751 notification_cancel (uid|1|5),(pid|1|5),(pkg|3),(id|1|5),(tag|3),(userid|1|5),(required_flags|1),(forbidden_flags|1),(reason|1|5),(listener|3)# when someone tries to cancel all of the notifications for a particular package2752 notification_cancel_all (uid|1|5),(pid|1|5),(pkg|3),(userid|1|5),(required_flags|1),(forbidden_flags|1),(reason|1|5),(listener|3)# when the notification panel is shown# Note: New tag range starts here since 2753+ have been used below.27500 notification_panel_revealed (items|1)# when the notification panel is hidden27501 notification_panel_hidden# when notifications are newly displayed on screen, or disappear from screen27510 notification_visibility_changed (newlyVisibleKeys|3),(noLongerVisibleKeys|3)# when notifications are expanded, or contracted27511 notification_expansion (key|3),(user_action|1),(expanded|1),(lifespan|1),(freshness|1),(exposure|1)# when a notification has been clicked27520 notification_clicked (key|3),(lifespan|1),(freshness|1),(exposure|1)# when a notification action button has been clicked27521 notification_action_clicked (key|3),(action_index|1),(lifespan|1),(freshness|1),(exposure|1)# when a notification has been canceled27530 notification_canceled (key|3),(reason|1),(lifespan|1),(freshness|1),(exposure|1)# replaces 27510 with a row per notification27531 notification_visibility (key|3),(visibile|1),(lifespan|1),(freshness|1),(exposure|1),(rank|1)# a notification emited noise, vibration, or light27532 notification_alert (key|3),(buzz|1),(beep|1),(blink|1)# a notification was added to a autogroup27533 notification_autogrouped (key|3)# notification was removed from an autogroup275534 notification_unautogrouped (key|3)# ---------------------------# Watchdog.java# ---------------------------2802 watchdog (Service|3)2803 watchdog_proc_pss (Process|3),(Pid|1|5),(Pss|1|2)2804 watchdog_soft_reset (Process|3),(Pid|1|5),(MaxPss|1|2),(Pss|1|2),(Skip|3)2805 watchdog_hard_reset (Process|3),(Pid|1|5),(MaxPss|1|2),(Pss|1|2)2806 watchdog_pss_stats (EmptyPss|1|2),(EmptyCount|1|1),(BackgroundPss|1|2),(BackgroundCount|1|1),(ServicePss|1|2),(ServiceCount|1|1),(VisiblePss|1|2),(VisibleCount|1|1),(ForegroundPss|1|2),(ForegroundCount|1|1),(NoPssCount|1|1)2807 watchdog_proc_stats (DeathsInOne|1|1),(DeathsInTwo|1|1),(DeathsInThree|1|1),(DeathsInFour|1|1),(DeathsInFive|1|1)2808 watchdog_scheduled_reboot (Now|2|1),(Interval|1|3),(StartTime|1|3),(Window|1|3),(Skip|3)2809 watchdog_meminfo (MemFree|1|2),(Buffers|1|2),(Cached|1|2),(Active|1|2),(Inactive|1|2),(AnonPages|1|2),(Mapped|1|2),(Slab|1|2),(SReclaimable|1|2),(SUnreclaim|1|2),(PageTables|1|2)2810 watchdog_vmstat (runtime|2|3),(pgfree|1|1),(pgactivate|1|1),(pgdeactivate|1|1),(pgfault|1|1),(pgmajfault|1|1)2811 watchdog_requested_reboot (NoWait|1|1),(ScheduleInterval|1|3),(RecheckInterval|1|3),(StartTime|1|3),(Window|1|3),(MinScreenOff|1|3),(MinNextAlarm|1|3)# ---------------------------# BackupManagerService.java# ---------------------------2820 backup_data_changed (Package|3)2821 backup_start (Transport|3)2822 backup_transport_failure (Package|3)2823 backup_agent_failure (Package|3),(Message|3)2824 backup_package (Package|3),(Size|1|2)2825 backup_success (Packages|1|1),(Time|1|3)2826 backup_reset (Transport|3)2827 backup_initialize2828 backup_requested (Total|1|1),(Key-Value|1|1),(Full|1|1)2829 backup_quota_exceeded (Package|3)2830 restore_start (Transport|3),(Source|2|5)2831 restore_transport_failure2832 restore_agent_failure (Package|3),(Message|3)2833 restore_package (Package|3),(Size|1|2)2834 restore_success (Packages|1|1),(Time|1|3)2840 full_backup_package (Package|3)2841 full_backup_agent_failure (Package|3),(Message|3)2842 full_backup_transport_failure2843 full_backup_success (Package|3)2844 full_restore_package (Package|3)2845 full_backup_quota_exceeded (Package|3)2850 backup_transport_lifecycle (Transport|3),(Bound|1|1)# ---------------------------# SystemServer.java# ---------------------------# SystemServer.run() starts:3010 boot_progress_system_run (time|2|3)# ---------------------------# PackageManagerService.java# ---------------------------# Package Manager starts:3060 boot_progress_pms_start (time|2|3)# Package Manager .apk scan starts:3070 boot_progress_pms_system_scan_start (time|2|3)# Package Manager .apk scan starts:3080 boot_progress_pms_data_scan_start (time|2|3)# Package Manager .apk scan ends:3090 boot_progress_pms_scan_end (time|2|3)# Package Manager ready:3100 boot_progress_pms_ready (time|2|3)# + check activity_launch_time for Home app# Value of "unknown sources" setting at app install time3110 unknown_sources_enabled (value|1)# Package Manager critical info3120 pm_critical_info (msg|3)# ---------------------------# WindowManagerService.java# ---------------------------# Out of memory for surfaces.31000 wm_no_surface_memory (Window|3),(PID|1|5),(Operation|3)# Task created.31001 wm_task_created (TaskId|1|5),(StackId|1|5)# Task moved to top (1) or bottom (0).31002 wm_task_moved (TaskId|1|5),(ToTop|1),(Index|1)# Task removed with source explanation.31003 wm_task_removed (TaskId|1|5),(Reason|3)# Stack created.31004 wm_stack_created (StackId|1|5)# Home stack moved to top (1) or bottom (0).31005 wm_home_stack_moved (ToTop|1)# Stack removed.31006 wm_stack_removed (StackId|1|5)# bootanim finished:31007 wm_boot_animation_done (time|2|3)# ---------------------------# InputMethodManagerService.java# ---------------------------# Re-connecting to input method service because we haven't received its interface32000 imf_force_reconnect_ime (IME|4),(Time Since Connect|2|3),(Showing|1|1)# ---------------------------# WallpaperManagerService.java# ---------------------------33000 wp_wallpaper_crashed (component|3)# ---------------------------# Device idle# ---------------------------34000 device_idle (state|1|5), (reason|3)34001 device_idle_step34002 device_idle_wake_from_idle (is_idle|1|5), (reason|3)34003 device_idle_on_start34004 device_idle_on_phase (what|3)34005 device_idle_on_complete34006 device_idle_off_start (reason|3)34007 device_idle_off_phase (what|3)34008 device_idle_off_complete34009 device_idle_light (state|1|5), (reason|3)34010 device_idle_light_step# ---------------------------# DisplayManagerService.java# ---------------------------# Auto-brightness adjustments by the user.35000 auto_brightness_adj (old_adj|5),(old_lux|5),(old_brightness|5),(old_gamma|5),(new_adj|5),(new_lux|5),(new_brightness|5),(new_gamma|5)# ---------------------------# ConnectivityService.java# ---------------------------# Connectivity state changed50020 connectivity_state_changed (type|1),(subtype|1),(state|1)# ---------------------------# NetworkStatsService.java# ---------------------------51100 netstats_mobile_sample (dev_rx_bytes|2|2),(dev_tx_bytes|2|2),(dev_rx_pkts|2|1),(dev_tx_pkts|2|1),(xt_rx_bytes|2|2),(xt_tx_bytes|2|2),(xt_rx_pkts|2|1),(xt_tx_pkts|2|1),(uid_rx_bytes|2|2),(uid_tx_bytes|2|2),(uid_rx_pkts|2|1),(uid_tx_pkts|2|1),(trusted_time|2|3)51101 netstats_wifi_sample (dev_rx_bytes|2|2),(dev_tx_bytes|2|2),(dev_rx_pkts|2|1),(dev_tx_pkts|2|1),(xt_rx_bytes|2|2),(xt_tx_bytes|2|2),(xt_rx_pkts|2|1),(xt_tx_pkts|2|1),(uid_rx_bytes|2|2),(uid_tx_bytes|2|2),(uid_rx_pkts|2|1),(uid_tx_pkts|2|1),(trusted_time|2|3)# ---------------------------# LockdownVpnTracker.java# ---------------------------51200 lockdown_vpn_connecting (egress_net|1)51201 lockdown_vpn_connected (egress_net|1)51202 lockdown_vpn_error (egress_net|1)# ---------------------------# ConfigUpdateInstallReceiver.java# ---------------------------51300 config_install_failed (dir|3)# ---------------------------# IntentFirewall.java# ---------------------------51400 ifw_intent_matched (Intent Type|1|5),(Component Name|3),(Caller Uid|1|5),(Caller Pkg Count|1|1),(Caller Pkgs|3),(Action|3),(MIME Type|3),(URI|3),(Flags|1|5)# ---------------------------# IdleMaintenanceService.java# ---------------------------51500 idle_maintenance_window_start (time|2|3), (lastUserActivity|2|3), (batteryLevel|1|6), (batteryCharging|1|5)51501 idle_maintenance_window_finish (time|2|3), (lastUserActivity|2|3), (batteryLevel|1|6), (batteryCharging|1|5)# ---------------------------# MountService.java# ---------------------------2755 fstrim_start (time|2|3)2756 fstrim_finish (time|2|3)# ---------------------------# AudioService.java# ---------------------------40000 volume_changed (stream|1), (prev_level|1), (level|1), (max_level|1), (caller|3)40001 stream_devices_changed (stream|1), (prev_devices|1), (devices|1)# ---------------------------# GestureLauncherService.java# ---------------------------40100 camera_gesture_triggered (gesture_on_time|2|3), (sensor1_on_time|2|3), (sensor2_on_time|2|3), (event_extra|1|1)