linux下gdb单步调试（gdb single step debugging under linux）

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1、linux下gdb单步调试（GDBsinglestepdebuggingunderLinux）GDBsinglestepdebuggingunderLinuxSetbreakpoint(BreakPoint)Wesetbreakpointswiththebreakcommand.Howmanybreakpointsaresetonthefront?:BreakStopwhenyouenterthespecifiedfunction.InC++,youcanspecifythefunctionnameinclass::functi

2、onorfunction(type,type)format.BreakStopatthespecifiedlinenumber.Break+offsetBreak-offsetStopsatthefrontorbackofthecurrentlinenumberintheoffsetrow.Offisetisanaturalnumber.Breakfilename:linenumStopatthelinenumrowofthesourcefilefilename.Breakfilename:functionStopattheent

3、ranceofthefunctionfunctionofthesourcefilefilename.Break*addressStopatthememoryaddressoftheprogramrunning.BreakWhenthebreakcommanddoesnothaveaparameter,itmeansthatitstopsatthenextinstruction.Break...IfItcanbetheparametermentionedabove.Conditionrepresentstheconditiona

4、ndstopswhentheconditionisestablished.Forexample,intheloopbody,youcansetthebreakifi=100toindicatethestopprogramwhenIis100.Whenyoulookatbreakpoints,youcanusetheinfocommand,asfollows:(Note:nrepresentsbreakpointnumber)Infobreakpoints[n]Infobreak[n]Two.Setobservationpoints(WatchPoi

5、nt)Observationpointsaregenerallyusedtoobservewhetheranexpression(variableisalsoanexpression)haschanged,andifthereisachange,stoptheprogramimmediately.Wehaveseveralwaystosetupobservationpoints:WatchSetanobservationpointfortheexpression(variable)expr.Stoptheprogramimmediate

6、lywhenthereisachangeintheexpressionvalue.RwatchWhentheexpressionofexpr(variable)read,stopprogram.AwatchWhentheexpression(variable)valuesreadorwrittento,stoptheprogram.InfowatchpointsListsalltheobservationpointscurrentlysetup.Three,setthecapturepoint(CatchPoint)Youc

7、ansetupcapturepointstocatchsomeeventswhentheprogramisrunning.Forexample,loadingasharedlibrary(DLL)oranexceptiontoC++.Setthecapturepointintheformof:CatchWheneventoccurs,stopprogram.Eventcanbethefollowing:1,throwanexceptionthrownbyC++.(throwkeyword)2,catchaC++captureofthe

8、exception.(catchkeyword)3,execcallsystemcallexec.(execisakeyw