Mobile Software Diagnostics Dmitry Vostokov Software Diagnostics Services Version 1.0 Facebook LinkedIn Twitter
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Mobile Software
Diagnostics
Dmitry Vostokov Software Diagnostics Services
Version 1.0
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Prerequisites Interest in software diagnostics, troubleshooting and debugging
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Audience Desktop/server development and
support
Mobile development and support
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The Current State Diagnostics 20 years ago
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The Trend (Hardware)
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Power
Time
Desktop
Mobile
The Trend (Software)
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Memory
Diagnostics Tools
Trace and Log Analysis Memory Dump Analysis
Trace and Log Analysis Memory Dump Analysis
MessageBox
The Vision Pattern-Oriented Diagnostics Unified Pattern Catalogues
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Software Diagnostics
A discipline studying abnormal software structure and behavior in software execution artifacts (such as memory dumps, software and network traces and logs) using pattern-driven and pattern-based analysis methodologies.
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Diagnostics Pattern
A common recurrent identifiable problem together with a set of recommendations and possible solutions to apply in a specific context.
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Pattern Orientation
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Pattern-Driven
Finding patterns in software artefacts
Using checklists and pattern catalogs
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Pattern-Based Pattern evolution
Catalogue evolution
Catalogue distribution
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Economic Benefits Improved communication of
diagnostics reports using uniform pattern language
Increased productivity by systematic pattern usage
Increased quality by leveraging existing expertise
Support for global teams Quantifiable analysis
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Native/Hybrid/Web Apps
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iOS _______
Mac OS X
Android _______
Linux
WP _______
Windows 8
Pattern Catalogs
Pattern Implementation
Pattern Implementation
Pattern Implementation
Web _______
JS
Pattern Implementation
Stack Trace Collection
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09-08 22:38:11.569: V/AudioHardwareMSM72XX(94): count : 4800 09-08 22:38:11.739: W/AudioFlinger(94): write blocked for 169 msecs, 1549 delayed writes, thread 0xccd0 09-08 22:38:14.309: I/System.out(21804): --- Stack Trace Collection --- 09-08 22:38:14.309: I/System.out(21804): Thread[JDWP,5,system]: 09-08 22:38:14.309: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[GC,5,system]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[Signal Catcher,5,system]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[main,5,main]: 09-08 22:38:14.319: I/System.out(21804): android.os.MessageQueue.nativePollOnce(Native Method) 09-08 22:38:14.319: I/System.out(21804): android.os.MessageQueue.next(MessageQueue.java:119) 09-08 22:38:14.319: I/System.out(21804): android.os.Looper.loop(Looper.java:117) 09-08 22:38:14.319: I/System.out(21804): android.app.ActivityThread.main(ActivityThread.java:3687) 09-08 22:38:14.319: I/System.out(21804): java.lang.reflect.Method.invokeNative(Native Method) 09-08 22:38:14.319: I/System.out(21804): java.lang.reflect.Method.invoke(Method.java:507) 09-08 22:38:14.319: I/System.out(21804): com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 09-08 22:38:14.319: I/System.out(21804): com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.main(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[HeapWorker,5,system]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[Compiler,5,system]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[Binder Thread #1,5,main]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.319: I/System.out(21804): Thread[Thread-10,5,main]: 09-08 22:38:14.319: I/System.out(21804): dalvik.system.VMStack.getThreadStackTrace(Native Method) 09-08 22:38:14.329: I/System.out(21804): java.lang.Thread.getStackTrace(Thread.java:737) 09-08 22:38:14.329: I/System.out(21804): java.lang.Thread.getAllStackTraces(Thread.java:630) 09-08 22:38:14.329: I/System.out(21804): com.example.deadlock.FullscreenActivity$3.run(FullscreenActivity.java:67) 09-08 22:38:14.329: I/System.out(21804): java.lang.Thread.run(Thread.java:1019) 09-08 22:38:14.329: I/System.out(21804): Thread[Binder Thread #2,5,main]: 09-08 22:38:14.329: I/System.out(21804): dalvik.system.NativeStart.run(Native Method) 09-08 22:38:14.329: I/System.out(21804): --- end ---
Android / Java example
Memory Analysis Patterns Not limited to memory dumps
Can be applied to traces / logs
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Memory dumps Scripts Debugger
logs
Problem No / Limited memory dump analysis
Limited OS debugger support
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Solution State Dump trace analysis pattern
Paratext memory analysis pattern
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State Dump
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Time# PID TID Time Message
stack traces variables status reports
Paratext
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$ ps -t ps -t USER PID PPID VSIZE RSS WCHAN PC NAME […] app_42 24101 24100 137696 15756 ffffffff 00000000 S HeapWorker app_42 24102 24100 137696 15756 ffffffff 00000000 S GC app_42 24103 24100 137696 15756 ffffffff 00000000 S Signal Catcher app_42 24104 24100 137696 15756 ffffffff 00000000 S Compiler app_42 24105 24100 137696 15756 ffffffff 00000000 S Binder Thread # app_42 24106 24100 137696 15756 ffffffff 00000000 S Binder Thread # app_42 24107 24100 137696 15756 ffffffff 00000000 S Binder Thread # app_57 24109 93 146876 19268 ffffffff 00000000 S com.example.spikingthread app_57 24110 24109 146876 19268 ffffffff 00000000 S HeapWorker app_57 24111 24109 146876 19268 ffffffff 00000000 S GC app_57 24112 24109 146876 19268 ffffffff 00000000 S Signal Catcher app_57 24113 24109 146876 19268 ffffffff 00000000 S JDWP app_57 24114 24109 146876 19268 ffffffff 00000000 S Compiler app_57 24115 24109 146876 19268 ffffffff 00000000 S Binder Thread # app_57 24116 24109 146876 19268 ffffffff 00000000 S Binder Thread # app_57 24117 24109 146876 19268 ffffffff 00000000 S Thread-10 app_57 24122 24109 146876 19268 ffffffff 00000000 R Thread-11 shell 24123 143 800 336 c00a6fc8 afd0c3bc S /system/bin/sh root 24125 2 0 0 ffffffff 00000000 S flush-138:14 root 24126 2 0 0 ffffffff 00000000 S flush-179:0
Android / Java example
Mobile DA+TA Dump Analysis
Memory analysis patterns
Trace Analysis Trace analysis patterns
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Mobile: Another Meaning
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Further Reading
Introduction to Pattern-Driven Software Diagnostics
Introduction to Pattern-Based Software Diagnostics
Debugging TV episodes 0x32 and 0x33
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Q&A
Please send your feedback using the contact form on PatternDiagnostics.com
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Thank you for attendance!
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