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Crash Dump Analysis MFF UK – summer semester 2011 Jakub Jermář Martin Děcký
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Agenda
Transcript of 00-agenda
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Crash Dump AnalysisMFF UK summer semester 2011
Jakub JermMartin Dck
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CrashDumpAnalysisMFFUKsummersemester2011 2
Motivation
Goal:Usetherighttoolwhenanapplicationorthekernelcrashes.
Observation:printf()isusuallynottherighttoolforsatisfyinggoal.
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CrashDumpAnalysisMFFUKsummersemester2011 3
Motivation(2)
Moreobservations
Acrashmighthappeninaproductionsystem Wecannotalterthebinaryandrunitagain Wehavetoinvestigatefromtherecordofthememorylayoutinthetimeofthecrash(crashdump)
Itisnotwisetoreinventthewheel Thiscourseisaboutsomewellproventoolsandbestpractices
Somedegreeoflowlevelprogrammingknowledgeisnecessary
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CrashDumpAnalysisMFFUKsummersemester2011 4
Outline
Basiclowlevelprogrammingknowledge
Processorarchitectures,assembler,stack,ABI
IA32,AMD64,SPARCV9
Basicsystemdebuggingtools
Solaris,Linux,Windows
Corefiles,crashdumps
Howtoanalyzethem
Basicsofgdb,mdb
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CrashDumpAnalysisMFFUKsummersemester2011 5
Outline(2)
Somecommoncausesofcrashes
Memorycorruption
Deadlock
Lockup
Toolsfordynamictracing
DTrace
Toolsforcommandlinesystemdiagnostics
prstat,pstack,ptree,iostat,vmstat,mpstat,truss
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CrashDumpAnalysisMFFUKsummersemester2011 6
Agenda
Lectures
Tuesday10:4012:10roomS10
Tutorials/Labs
Tuesday12:2013:50roomSU1 Physicalcapacityislimitedto15students
Pleasemakesureyouhaveyourulabaccountworking
Youcanbringyourownnotebooks MakesureyouhaveInternetconnection
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CrashDumpAnalysisMFFUKsummersemester2011 7
Agenda(2)
Lecturers
JakubJerm([email protected])
MartinDck([email protected])
Othercontributors
VtzslavBtrla([email protected])
VineethPillai
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CrashDumpAnalysisMFFUKsummersemester2011 8
Agenda(3)
Web
Slides,basicinformation
http://d3s.mff.cuni.cz/cda
Mailinglist
Importantannouncements,discussion Pleasemakesureyouareenlisted
https://d3s.mff.cuni.cz/mailman/listinfo/cda
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CrashDumpAnalysisMFFUKsummersemester2011 9
Grading
Credit
Nolabattendanceneeded Butstronglyrecommended
Passingapracticaltest E.g.identifyingarootcausefromacrashdump Attheendofthesemester,threepossibilities
Exam
Passingawrittentest Atleastthreeterms,questionswillbeavailable
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CrashDumpAnalysisMFFUKsummersemester2011 10
ExpectedKnowledge
BasicClanguageknowledge Atleastverybasicknowledgeoflowlevelprogramming
Principlesofcomputersshouldsuffice BasicEnglish
Fortheslidesandsomelectures
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CrashDumpAnalysisMFFUKsummersemester2011 11
Resources
Lectures&Labs
Mostimportanthandsonexperience
Slidesarejustanoutline
TheBook
FrankHofmann:TheSolarisOperatingSystemonx86Platforms,CrashdumpAnalysis,OperatingSystemInternals
http://opensolaris.org/os/community/documentation/files/book.pdf
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CrashDumpAnalysisMFFUKsummersemester2011 12
Resources(2)
Otherbooks
RichardMcDougall,JimMauro,BrendanGregg:SolarisPerformanceandTools:DTraceandMDBTechniquesforSolaris10andOpenSolaris Dynamictracingandcoredumpanalysisusingmdb
ChrisDrake,KimberleyBrown:PANIC!UNIXSystemCrashDumpAnalysisHandbook Usefullgeneralreference
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CrashDumpAnalysisMFFUKsummersemester2011 13
Resources(3)
Otherusefulresources
NASMManual,AppendixB:InstructionList QuickreferenceofIA32andAMD64instructions
http://www.nasm.us/doc/nasmdocb.html
SPARCAssemblyLanguageReferenceManual,AppendixE:SPARCV9InstructionSet QuickreferenceofSPARCV9instructions
http://download.oracle.com/docs/cd/E1996301/8211607/sparcv915322/index.html
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CrashDumpAnalysisMFFUKsummersemester2011 14
Disclaimer
Yourmileagemayvary
Notallsystemshavethesamelevelofsupportforcrashdumpanalysisandobservability Wewouldliketoteachtheprincipleswithoutrestrainingyoutoanyparticularplatform
Butwealsoneedtobeabletoshowtheprinciplesinaction
ThereforewearegoingtouseSolarismostofthetime Weareopentoyoursuggestions
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