Android分析Monkey日志

adb Android 2018年12月6日 pm7:29发布6年前 (2018)更新城堡大人

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1，系统基本信息，包括内存，CPU ，进程队列，虚拟内存，垃圾回收等信息。

----- MEMORY INFO (/proc/meminfo) ------

------ CPU INFO (top -n 1 -d 1 -m 30 -t) ------

------ PROCRANK (procrank) ------

------ VIRTUAL MEMORY STATS (/proc/vmstat) ------

------ VMALLOC INFO (/proc/vmallocinfo) ------

格式如下：

------ MEMORY INFO (/proc/meminfo) ------
MemTotal:         347076 kB
MemFree:           56408 kB
Buffers:            7192 kB
Cached:           104064 kB
SwapCached:            0 kB
Active:           192592 kB
Inactive:          40548 kB
Active(anon):     129040 kB
Inactive(anon):     1104 kB
Active(file):      63552 kB
Inactive(file):    39444 kB
Unevictable:        7112 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                44 kB
Writeback:             0 kB
AnonPages:        129028 kB
Mapped:            73728 kB
Shmem:              1148 kB
Slab:              13072 kB
SReclaimable:       4564 kB
SUnreclaim:         8508 kB
KernelStack:        3472 kB
PageTables:        12172 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      173536 kB
Committed_AS:    7394524 kB
VmallocTotal:     319488 kB
VmallocUsed:       90752 kB
VmallocChunk:     181252 kB

2，时间信息，也是我们主要分析的信息。

------ VMALLOC INFO (/proc/vmallocinfo) ------

------ EVENT INFO (/proc/vmallocinfo) ------

格式如下：

------ SYSTEM LOG (logcat -b system -v time -d *:v) ------
01-15 16:41:43.671 W/PackageManager( 2466): Unknown permission com.wsomacp.permission.PROVIDER in package com.android.mms
01-15 16:41:43.671 I/ActivityManager( 2466): Force stopping package com.android.mms uid=10092
01-15 16:41:43.675 I/UsageStats( 2466): Something wrong here, didn't expect com.sec.android.app.twlauncher to be paused
01-15 16:41:44.108 I/ActivityManager( 2466): Start proc com.sec.android.widgetapp.infoalarm for service com.sec.android.widgetapp.infoalarm/.engine.DataService: pid=20634 uid=10005 gids={3003, 1015, 3002}
01-15 16:41:44.175 W/ActivityManager( 2466): Activity pause timeout for HistoryRecord{48589868 com.sec.android.app.twlauncher/.Launcher}
01-15 16:41:50.864 I/KeyInputQueue( 2466): Input event
01-15 16:41:50.866 D/KeyInputQueue( 2466): screenCaptureKeyFlag setting 0
01-15 16:41:50.882 I/PowerManagerService( 2466): Ulight 0->7|0
01-15 16:41:50.882 I/PowerManagerService( 2466): Setting target 2: cur=0.0 target=70 delta=4.6666665 nominalCurrentValue=0
01-15 16:41:50.882 I/PowerManagerService( 2466): Scheduling light animator!
01-15 16:41:51.706 D/PowerManagerService( 2466): enableLightSensor true
01-15 16:41:51.929 I/KeyInputQueue( 2466): Input event
01-15 16:41:51.933 W/WindowManager( 2466): No focus window, dropping: KeyEvent{action=0 code=26 repeat=0 meta=0 scancode=26 mFlags=9}

3，虚拟机信息，包括进程的，线程的跟踪信息，这是用来跟踪进程和线程具体点的好地方。

------ VM TRACES JUST NOW (/data/anr/traces.txt.bugreport: 2011-01-15 16:49:02) ------

------ VM TRACES AT LAST ANR (/data/anr/traces.txt: 2011-01-15 16:49:02) ------

格式如下：

----- pid 21161 at 2011-01-15 16:49:01 -----
Cmd line: com.android.mms

DALVIK THREADS:
"main" prio=5 tid=1 NATIVE
| group="main" sCount=1 dsCount=0 s=N obj=0x4001d8d0 self=0xccc8
| sysTid=21161 nice=0 sched=0/0 cgrp=default handle=-1345017808
| schedstat=( 4151552996 5342265329 10995 )
at android.media.MediaPlayer._reset(Native Method)
at android.media.MediaPlayer.reset(MediaPlayer.java:1218)
at android.widget.VideoView.release(VideoView.java:499)
at android.widget.VideoView.access$2100(VideoView.java:50)
at android.widget.VideoView$6.surfaceDestroyed(VideoView.java:489)
at android.view.SurfaceView.reportSurfaceDestroyed(SurfaceView.java:572)
at android.view.SurfaceView.updateWindow(SurfaceView.java:476)
at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:206)
at android.view.View.dispatchDetachedFromWindow(View.java:6082)
at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
at android.view.ViewGroup.removeAllViewsInLayout(ViewGroup.java:2296)
at android.view.ViewGroup.removeAllViews(ViewGroup.java:2254)
at com.android.mms.ui.SlideView.reset(SlideView.java:687)
at com.android.mms.ui.SlideshowPresenter.presentSlide(SlideshowPresenter.java:189)
at com.android.mms.ui.SlideshowPresenter$3.run(SlideshowPresenter.java:531)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
at dalvik.system.NativeStart.main(Native Method)

闲话少说，我总结了观察log文件的基本步骤。

如果是ANR问题，则搜索“ANR”关键词。快速定位到关键事件信息。
如果是ForceClosed 和其它异常退出信息，则搜索"Fatal" 关键词，快速定位到关键事件信息。
定位到关键事件信息后，如果信息不够明确的，再去搜索应用程序包的虚拟机信息，查看具体的进程和线程跟踪的日志，来定位到代码。

用这种方法，出现问题，根本不需要断点调试，直接定位到问题，屡试不爽。

下面，我们就开始来分析这个例子的log 。

打开log文件，由于是ANR错误，因此搜索"ANR " ，为何要加空格呢，你加上和去掉比较一下就知道了。可以屏蔽掉不少保存到anr.log文件的无效信息。

定位到关键的事件信息如下：

01-15 16:49:02.433 E/ActivityManager( 2466): ANR in com.android.mms (com.android.mms/.ui.SlideshowActivity)
01-15 16:49:02.433 E/ActivityManager( 2466): Reason: keyDispatchingTimedOut
01-15 16:49:02.433 E/ActivityManager( 2466): Load: 0.6 / 0.61 / 0.42
01-15 16:49:02.433 E/ActivityManager( 2466): CPU usage from 1337225ms to 57ms ago:
01-15 16:49:02.433 E/ActivityManager( 2466):   sensorserver_ya: 8% = 0% user + 8% kernel / faults: 40 minor
......

01-15 16:49:02.433 E/ActivityManager( 2466):  -com.android.mms: 0% = 0% user + 0% kernel
01-15 16:49:02.433 E/ActivityManager( 2466):  -flush-179:8: 0% = 0% user + 0% kernel
01-15 16:49:02.433 E/ActivityManager( 2466): TOTAL: 25% = 10% user + 14% kernel + 0% iowait + 0% irq + 0% softirq
01-15 16:49:02.436 I/        ( 2466): dumpmesg > "/data/log/dumpstate_app_anr.log"

我们用自然语言来描述一下日志，这也算是一种能力吧。

01-15 16:49:02.433 E/ActivityManager( 2466): ANR in com.android.mms (com.android.mms/.ui.SlideshowActivity)

翻译：在16:49分2秒433毫秒的时候 ActivityManager （进程号为2466) 发生了如下错误：com.android.mms包下面的.ui.SlideshowActivity 无响应。

01-15 16:49:02.433 E/ActivityManager( 2466): Reason: keyDispatchingTimedOut

翻译：原因， keyDispatchingTimeOut - 按键分配超时

01-15 16:49:02.433 E/ActivityManager( 2466): Load: 0.6 / 0.61 / 0.42

翻译：5分钟，10分钟，15分钟内的平均负载分别为：0.6 , 0.61 , 0.42

在这里我们大概知道问题是什么了，结合我们之前的操作流程，我们知道问题是在点击按钮某时候可能处理不过来按钮事件，导致超时无响应。那么现在似乎已经可以进行工作了。我们知道Activity中是通过重载dispatchTouchEvent(MotionEvent ev)来处理点击屏幕事件。然后我们可以顺藤摸瓜，一点点分析去查找原因。但这样够了么？
其实不够，至少我们不能准确的知道到底问题在哪儿，只是猜测，比如这个应用程序中，我就在顺藤摸瓜的时候发现了多个IO操作的地方都在主线程中，可能引起问题，但不好判断到底是哪个，所以我们目前掌握的信息还不够。

于是我们再分析虚拟机信息，搜索“Dalvik Thread”关键词，快速定位到本应用程序的虚拟机信息日志，如下：

----- pid 2922 at 2011-01-13 13:51:07 -----
Cmd line: com.android.mms

DALVIK THREADS:
"main" prio=5 tid=1 NATIVE
| group="main" sCount=1 dsCount=0 s=N obj=0x4001d8d0 self=0xccc8
| sysTid=2922 nice=0 sched=0/0 cgrp=default handle=-1345017808
| schedstat=( 3497492306 15312897923 10358 )
at android.media.MediaPlayer._release(Native Method)
at android.media.MediaPlayer.release(MediaPlayer.java:1206)
at android.widget.VideoView.stopPlayback(VideoView.java:196)
at com.android.mms.ui.SlideView.stopVideo(SlideView.java:640)
at com.android.mms.ui.SlideshowPresenter.presentVideo(SlideshowPresenter.java:443)
at com.android.mms.ui.SlideshowPresenter.presentRegionMedia(SlideshowPresenter.java:219)
at com.android.mms.ui.SlideshowPresenter$4.run(SlideshowPresenter.java:516)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
at dalvik.system.NativeStart.main(Native Method)

"Binder Thread #3" prio=5 tid=11 NATIVE
| group="main" sCount=1 dsCount=0 s=N obj=0x4837f808 self=0x242280
| sysTid=3239 nice=0 sched=0/0 cgrp=default handle=2341032
| schedstat=( 32410506 932842514 164 )
at dalvik.system.NativeStart.run(Native Method)

"AsyncQueryWorker" prio=5 tid=9 WAIT
| group="main" sCount=1 dsCount=0 s=N obj=0x482f4b80 self=0x253e10
| sysTid=3236 nice=0 sched=0/0 cgrp=default handle=2432120
| schedstat=( 3225061 26561350 27 )
at java.lang.Object.wait(Native Method)
- waiting on <0x482f4da8> (a android.os.MessageQueue)
at java.lang.Object.wait(Object.java:288)
at android.os.MessageQueue.next(MessageQueue.java:146)
at android.os.Looper.loop(Looper.java:110)
at android.os.HandlerThread.run(HandlerThread.java:60)

"Thread-9" prio=5 tid=8 WAIT
| group="main" sCount=1 dsCount=0 s=N obj=0x4836e2b0 self=0x25af70
| sysTid=2929 nice=0 sched=0/0 cgrp=default handle=2370896
| schedstat=( 130248 4389035 2 )
at java.lang.Object.wait(Native Method)
- waiting on <0x4836e240> (a java.util.ArrayList)
at java.lang.Object.wait(Object.java:288)
at com.android.mms.data.Contact$ContactsCache$TaskStack$1.run(Contact.java:488)
at java.lang.Thread.run(Thread.java:1096)

"Binder Thread #2" prio=5 tid=7 NATIVE
| group="main" sCount=1 dsCount=0 s=N obj=0x482f8ca0 self=0x130fd0
| sysTid=2928 nice=0 sched=0/0 cgrp=default handle=1215968
| schedstat=( 40610049 1837703846 195 )
at dalvik.system.NativeStart.run(Native Method)

"Binder Thread #1" prio=5 tid=6 NATIVE
| group="main" sCount=1 dsCount=0 s=N obj=0x482f4a78 self=0x128a50
| sysTid=2927 nice=0 sched=0/0 cgrp=default handle=1201352
| schedstat=( 40928066 928867585 190 )
at dalvik.system.NativeStart.run(Native Method)

"Compiler" daemon prio=5 tid=5 VMWAIT
| group="system" sCount=1 dsCount=0 s=N obj=0x482f1348 self=0x118960
| sysTid=2926 nice=0 sched=0/0 cgrp=default handle=1149216
| schedstat=( 753021350 3774113668 6686 )
at dalvik.system.NativeStart.run(Native Method)

"JDWP" daemon prio=5 tid=4 VMWAIT
| group="system" sCount=1 dsCount=0 s=N obj=0x482f12a0 self=0x132940
| sysTid=2925 nice=0 sched=0/0 cgrp=default handle=1255680
| schedstat=( 2827103 29553323 19 )
at dalvik.system.NativeStart.run(Native Method)

"Signal Catcher" daemon prio=5 tid=3 RUNNABLE
| group="system" sCount=0 dsCount=0 s=N obj=0x482f11e8 self=0x135988
| sysTid=2924 nice=0 sched=0/0 cgrp=default handle=1173688
| schedstat=( 11793815 12456169 7 )
at dalvik.system.NativeStart.run(Native Method)

"HeapWorker" daemon prio=5 tid=2 VMWAIT
| group="system" sCount=1 dsCount=0 s=N obj=0x45496028 self=0x135848
| sysTid=2923 nice=0 sched=0/0 cgrp=default handle=1222608
| schedstat=( 79049792 1520840200 95 )
at dalvik.system.NativeStart.run(Native Method)

每一段都是一个线程，当然我们还是看线程号为1的主线程了。通过分析发现关键问题是这样：

at com.android.mms.ui.SlideshowPresenter$3.run(SlideshowPresenter.java:531)

定位到代码：

             mHandler.post(new Runnable() {
                    public void run() {
                        try {
                            presentRegionMedia(view, (RegionMediaModel) model, dataChanged);
                        } catch (OMADRMException e) {
                            Log.e(TAG, e.getMessage(), e);
                            Toast.makeText(mContext,
                                    mContext.getString(R.string.insufficient_drm_rights),
                                    Toast.LENGTH_SHORT).show();
                        } catch (IOException e){
                            Log.e(TAG, e.getMessage(), e);
                            Toast.makeText(mContext,
                                    mContext.getString(R.string.insufficient_drm_rights),
                                    Toast.LENGTH_SHORT).show();


                        }
                    }

很清楚了， Handler.post 方法之后执行时间太长的问题。继续看presentRegionMedia(view, (RegionMediaModel) model, dataChanged);方法，发现最终是调用的framework 中MediaPlayer.stop方法。

至此，我们的日志分析算是告一段落。可以开始思考解决办法了。

本文摘抄于《Android如何分析和研究Monkey Log文件》