Why Programs Fail - Observing Facts

Transcript

1. Why Programs Fail - Observing Facts
   ߊ಴੗ : ޙഅ҃ (rabidus@gmail.com)
   ߊ಴ੌ : 2007֙ 4ਘ 16ੌ
   

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2. Table of contents
   Observing Facts
   Log
   Interactive Debugging
   Post-mortem Debugging
   Query Event
   Visualization
   

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3. Observing Facts
   ҳ୓੸ੋ प೯ীࢲ ੌযաח ࢎपٜ(Facts)ܳ ҙ଴
   (Observing)
   оࢸҗ ো৉ਸ ా೧ࢲ ঳਷ ௏٘ߧਤ੄ Ѿҗܳ ҙ଴
   ҙ଴੄ ਗ஗
   рࢼೞ૑ ݈ইঠ ೠ׮.
   ޖ঺ਸ ঱ઁ ҙ଴ೡ Ѫੋ૑ ঌইঠ ೠ׮
   ୓҅੸ਵ۽ ૓೯ೞۄ
   ҙ଴ ߑߨ
   Log
   Interactive Debugging
   Post-mortem Debugging
   

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4. Log
   ೐۽Ӓ۔੉ ࢎपਸ ୹۱ೞח ߑߨ
   ٣ߡӒ ۽Ӓ, printf٣ߡӦ
   ױ੼
   ૑੷࠙ೠ ௏٘
   ૑੷࠙ೠ ୹۱
   ࣘب ੷ೞ
   ੗ܐ ࣚप
   

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5. Log (Con’t)
   ੹ਊ ۽Ӓ ӝߨ
   ಴ળ ഋधਸ ࢎਊ
   ݫఋؘ੉ఠ
   ੹ਊ ࠭য ࢎਊ
   ௏٘ਤ஖ (౵ੌݺ, ௏٘ۄੋ), ݽٕݺ, दр ੉߮౟ (WARNING, DEBUG, TRACE,
   FATAL)
   ৘ઁ
   “2007-04-02 20:24:13,509 [main] DEBUG TestLogging – Start of main()”
   2007-04-02|02:24:13|509|main|DEBUG|TestLogging – Start of main()
   ۽Ӧਸ ࢶఖ оמೞѱ ݅ٚ׮
   C/CPP੄ ۽Ӧ ݒ௼۽
   Aspect
   о߸੸ੋ ࣁ޻ب ೲਊ
   ޙઁ੼੄ ࢿѺਸ ҳ࠙
   ੌҙࢿ
   ੤ࢎਊೡ ࣻ ੓ח ۽Ӧਸ ࢤࢿ
   

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6. C/CPP Macro Log
   int _tmain(int argc, _TCHAR* argv[])
   {
   logFunc = (LOG_OUTPUT_FUNC) printf;
   int size = 10;
   SetPrintableModule(LOG_MODULE_UI, 1);
   LOG_DEBUG(LOG_MODULE_UI, ("size = %d", size));
   return 1;
   }
   

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7. Log Library
   ۽Ӧ੄ ױ੼ਸ ӓࠂ
   ಴ળ ഋधࢎਊ
   ੹ਊ ࠭য ૑ਗ
   ۽Ӓ য়ߡ೻٘ ઴੐
   ࠺زӝ ۽Ӓ
   Windows Service, remote socket
   ۽Ӓ ۨ߰
   ۽Ӓ ২࣌ ૑ਗ
   ੌҙػ ੋఠಕ੉झ
   ઙܨ
   Log4XXX
   NT Event Log
   DarkLog
   

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8. Log4XXX
   Apache Logging Service
   ׮নೠ ঱য, ജ҃ ૑ਗ
   CPP, JAVA, .NET, Peal, PHP, PLSQL, JDK 1.4’s util.logging.framwork
   ౠ૚
   Logger hierarchy
   com.fooܳ ࢚ࣘ߉਷ com.foo.Bar
   log4cxx::LoggerPtr logger(log4cxx::Logger::getLogger("com.foo"));
   log4cxx::LoggerPtr barlogger(Logger::getLogger(("com.foo.Bar"));
   Log Level
   Appender
   console, file, gui component, remote socket, NT event log, syslog
   Asynchronous log
   Layout
   Environment File
   INI, XML
   ੹ਊ࠭য
   ChainSaw
   TraceTool 8
   

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9. Log4XXX (Con’t)
   

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10. NT Event Log
    

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11. DarkView Concept
    Server
    Server
    Server
    Server
    Server
    log aggregater
    (windows service)
    darkview
    log data
    remote

    socket
    i/o
    query
    

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12. DarkView (Con’t)
    

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13. Aspect
    पઁ௏٘(ز੘)ܳ ࢸݺ(aspect)ೞח ۽Ӧ (advice)ܳ पઁ
    ௏٘৬ ܻ࠙ೞৈ ੘ࢿೞৈ ߹ب੄ ஹ౵ੌ۞(ajc)۽ ૞ ֍য
    (weaving)૓׮.
    ۽Ӓо प೯ؼ ੢ࣗ, ਤ஖(point cut)ܳ ݺद ೡ ࣻ ੓׮.
    पઁ ௏٘ী ৔ೱਸ ޷஖૑ ঋਵݴ, ࢶఖ੸ਵ۽ ࢎਊоמೞ
    Ҋ ੤ࢎਊ੉ ए਍ ࣛܖ࣌
    

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14. Aspect (Con’t)
    // Shop.java
    class Article {
    public void Buy() {// code}
    }
    // LogBuy.aj
    public aspect LogBuy {
    pointcut buyMethod() : call(public void Article.buy());
    before() : buyMethod() {
    System.out.println(“Entering Article.buy()”);}
    after() : buyMethod() {
    System.out.println(“Leaving Article.buy()”);}
    }
    // compile
    $ajc LogBuy.aj Shop.java
    // Pseudocode
    class Article {
    public void Buy()
    {
    System.out.println((“Entering Article.buy()”);
    // Code();
    System.out.println((“Leaving Article.buy()”);
    }
    }
    

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15. Interactive Debugging
    Debuggerܳ ࢎਊೞৈ पदрਵ۽ ҙ଴
    ੢੼
    औѱ द੘ ೡ ࣻ ੓׮.
    ࣗझ ࣻ੿, ஹ౵ੌ੉ ೙ਃহ੉ ߄۽ ҙ଴ оמ
    ਬোೠ ҙ଴
    ࣻ೯઺ ࣻ੿, ੐੄੄ ؘ੉ఠ ҙ଴ оמ
    ૊п੸ੋ ࣁ࣌
    ૊द ೐۽Ӓ۔ ࢚కܳ द೷೧ ࠁҊ ࡅܰѱ Ѿҗܳ ঳חؘ ੸೤ (gdb੄ command)
    Debugger੄ ઑѤ
    ೐۽Ӓ۔ਸ प೯ೞҊ ౠ੿ ઑѤೞী ݥ୶ѱ ೧ঠ ೠ׮.
    ੿૑ػ ೐۽Ӓ۔੄ ࢚కܳ ҙ଴ оמ೧ঠ ೠ׮.
    ੿૑ػ ೐۽Ӓ۔੄ ࢚కܳ ߸҃ ೡ ࣻ ੓যঠ ೠ׮.
    

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16. Debugger
    IDE ӝ߈ Debugger
    Visual Studio, Eclipse, Ӓ৻ ׮ࣻ
    ੹ޙ Debugger
    WinDBG, gdb, Ӓ৻ ׮ࣻ
    Deugger ӝמ
    break(breakpoint) and run, watch (watch point), modify variable
    value, calltrace
    enc (edit and continue)
    

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17. Visual Studio Debugger Visualization
    

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18. DEMO DDD Visualization
    

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19. Post-mortem Debugging
    Crashٸ੄ ೐۽Ӓ۔੄ ࢚కܳ ౵ੌ۽ ؒ೐ܳ Debuggerо ׮द ੍য
    Crash࢚కੌ ٸ੄ ೐۽Ӓ۔ ࢚కܳ ઑࢎ
    Dumper
    WinDBG
    UserDump
    Dr. Watson
    Error Reporting
    Windows Dump API
    Windows Visual Studio .NET
    Dump Debugger
    WinDBG
    Windows Visual Studio
    gdb
    

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20. WinDBG
    

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21. Dr. Watson
    

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22. DEMO User Dump
    

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23. Windows Error Reporting
    

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24. Windows Debug Tool
    ౠ੿ ࢚ടীࢲ ਬਊೞѱ ࢎਊೞח ٣ߡӦ ో
    GFlag
    Heap curruption
    Performance Monitoring
    hang(dead lock, cpu 100%)
    

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25. DEMO GFlag
    

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26. Performance Monitor
    

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27. FIN
    

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