demandvista系统优化
vista系统优化 时间:2021-02-25 阅读:()
WindowsVistaHeapManagementEnhancementsAdrianMarinescuDevelopmentLeadadrmarin@microsoft.
com2AgendaWindowsNTHeapManagementbasicsandevolutionWindowsVistaheap–majormilestone–Developmentprinciplesandguidelines–Securityfeatures–PerformancefeaturesQ&A3IntroductionSecurity–industry-wideconcernTwCdrivingmultiplesecurityinitiativesTheNTHeap–Strategicpointindefense–Improvedtorespondtoindustrytrendsinusage4PartI–Basics5HeapEvolutionTimeNT4NT4/SP4Windows2000XP/SP2Windows2003WindowsVistaBasicsPerformanceOpt-inSMPScalabilityHeapMitigationsEnhancedsecurityPerformanceQualitytoolIndustryWorkloadExploitationParallelism6NTHeapOverviewTheNTMemoryManagerSegmentManagement(forblocks1KNon-dedicatedfreelist(1–512KBytes)Segment1Segment64Segmentarray>512KVirtualBlocksList816>512K8HeapSegmentsSeg.
HB1B2UncommitedspaceBn…ByUncommitedspaceReservedspace9BlockEntryinpriorWindowsNTVersions0:018>dc04392f8004392f8000040002000000010442da6000240e68SizePreviousblocksizetagunusedbytesflagssegmentF-LinkB-Link10RoleofLinkEntryinEarlyExploitsArbitrarypointerwritemovmoveaxeax,DWORDPTR[,DWORDPTR[ecxecx]]movmovecxecx,DWORDPTR[ecx+4],DWORDPTR[ecx+4]movmovDWORDPTR[DWORDPTR[ecxecx],],eaxeaxmovmovDWORDPTR[eax+4],DWORDPTR[eax+4],ecxecxFwdLinkBkLinkValuetowriteLocationtowrite11LookasideListsNon-blockingsingle-linkedlists0-89-16Lookasidelists1016-1024HeaderLinkunusedHeaderLinkunused12TheLowFragmentationHeapArchitectureSMPUnit10-89-16Allocationbuckets1025-108815873-16384AllocationgranularitySMPUnitNSMPUnit1SegmentspoolSegmentspoolSegmentspool13LowFragmentationHeapBlockEntrySub-SegmentFlags…RelativelinkSizeLFHBlockFrees-listSub-Segment…8bytesUserdata14EarlyHeapMitigationsSafeListRemovalEntry->FwdLink->BkLink==Entry->BkLink->FwdLink==Entry8-bitcookietestedonfreeLFHblockentryencodingF(randomnumber,Blockaddress,heap)15ChangeinLandscapeNewexploitingmethodssurfacedChangeinusageoutlook–Memoryusage–IncreaseavailabilityofSMP–Increaserelevanceof64bitcomputingCodequality–higherdemandinindustry16WindowsVistaHeapManagerKeyDevelopmentDirectionsPerformanceandreliabilitySecurityCodequality17WindowsNTHeapRequirements18SecurityCorrectness–like:–Guaranteesrequestedsizes–Lifetimeofallocations–Clearingcontentwhenrequestedetc.
Defenselineinheapbasedexploits:Defenselineinheapbasedexploits:––AttemptstomitigatetheeffectofanattackAttemptstomitigatetheeffectofanattack––MakesdifficulthidingheapMakesdifficulthidingheap--basedexploitsbasedexploits19PerformanceScalefromsmalldevicestolargeserversOptimizedforvariedusagepatternsFollowtheindustrytrend–Memoryusage–IncreaseinSMPavailability–H/Warchitectureadvances20CompatibilityApplicationsmayrelyonthingslike:–Reallocreturningsamepointer–Read/writeafterreleasingablock–Doublefree–Overrunsoverunusedstructuresetc.
Heapchangesmayhaveunintendedeffects,suchas:–Crashes,leaksorbrokenfunctionalityinpoorlywrittenapplications–Severeperformanceregressions21PartII-WindowsVistaHeap22WindowsVistaHeapSecurityFeaturesBlockmetadatarandomizationIntegritycheckonblockentryAlgorithmvariationinresponsetousagepatternRandomrebasingFunctionpointerrandomizationAbruptapplicationterminationonerror23BlockMetadataRandomizationApartoftheheaderisXORdwitharandomvalueLowperformanceimpactShouldmakeguessingtherightvalueimpracticalFlexibleandcontainedalgorithmandimplementationAgileinupdates24EntryIntegrityCheckPrevious8-bitcookiehasbeenrepurposedtovalidatealargerpartoftheheaderValuemayberandomizedalongwiththeotherfieldsValidatedduringinternaloperationstoo25Demo–HeapHeaderLayout26Automatictuning–ShifttoLFHallocationsatarbitrarypointsonruntime–Triggersonvariouspatterns–Involvesalsode-commit/commitpoliciesRuntimeAlgorithmVariation27MoreHeapRandomizationsHeapbaserandomization–thingstoconsider:–Fragmentationoftheapplicationaddressspaceaffectinglargeserverapplications–PossibleperformanceissuesifhigherrandomizationisusedHeapfunctionpointerrandomization–Takesawayaknownplacetofacilitatethecodeexecutionalongwithrebasing28Demo29AbruptTerminationonErrorAnydatainconsistencyorinvalidheapfunctionusagedetectedmaytriggeritThescopeisprocess-wide(anyheapintheprocesshasthesamebehavior)TheprocessisterminatedviaWindowsErrorReportingDetailedinfoisavailableinthedumpfileNofunctionprovidedtodisableitOnbydefaultfor64bitplatforms&apps30TerminationonErrors(cont.
)Programmaticopt-Inmethod(newHeapEnableTerminationOnCorruptionclassdefined)BOOLHeapSetInformation(HANDLEHeapHandle,HEAP_INFORMATION_CLASSHeapInformationClass,PVOIDHeapInformation,SIZE_THeapInformationLength);LargenumberofcomponentswithWindowsVistaareoptedinTheinformationisavailableinadebuggerextension31Demo32NTHeapManager–ImprovesCodeQualityBenefitstoappdevelopersEarlyerrordetectionImproveddebuggingaidtoreducecostofinvestigatingcorruptionsReducedtolerancetomisusageWindowsVistaappswillbemoreresilienttofutureheapchanges33KnownAttackVectors&WindowsVistaRemovedlookasidelistandarrayofliststargetedbypreviousexploitsIntegritycheckonblockmetadatasignificantobstacletobruteforceattacksMostWindowsprocessesterminateonmemoryerrorsDynamic(runtime)changeinheapalgorithmsobstacletoconsistentexploitsHeapstructuresandmemorymgmtchangeslimitportabilityofexploits34SecurityenhancementsareajourneyMitigationsarenotsubstituteforgooddevelopmentpracticesWindowsVistaisjustamilestoneincontinualheapimprovements35WindowsVistaHeapPerf&ReliabilityImprovedscenariosbydefaultfor:SMPscalabilityExternalfragmentationLargeheapsImprovedreferencelocalityon64bitplatformsReducedVirtualAddressexhaustionIncreasedresiliencetopatternsinvolvinglong-termallocations36KeyPerformanceEnhancementsAutomatictuningLowergranularityofcontrolpoliciestoswitchtotheLowFragmentationHeapUseoflazyinitializationRedesignedsegmentmanagementImprovedinternallookupalgorithmsAddressedfragmentationinproblematicscenariosLoweroverheadon64bit37RandomAllocationBenchmark(0-1K)05101520253012345678MillionThreadsOps.
/secWindowsServer2003RecentWindowsVistaRandomAllocationBenchmark(4-8k)0246810121416182012345678MillionThreadsOps.
/secWindowsServer2003RecentWindowsVista38FragmentationTest(512blocks/80bytes)VirtualaddressCost010002000300040005000600070008000Runtime(sec)BytesperleakedbloRecentWindowsVistaWindowsServer2003Committedmemorycost0100200300400500600700800Runtime(sec)BytesperleakedbloRecentWindowsVistaWindowsServer200339FragmentationTest(512blocks/80bytes)Heapperformanceonheapexpansionpattern1(512blocks)(70x)0100000200000300000400000500000600000700000800000Runtime(sec)Ops.
/secRecentWindowsVistaWindowsServer200340FragmentationScenarioIIPatternPatternOps/secOps/sec(Recent(RecentWindowsWindowsVista)Vista)Ops/secOps/sec(Windows(WindowsServerServer2003SP1)2003SP1)ImprovemeImprovementntxx2562576004388663951292770915161441024403774517917204819418025776740968253412687841Memoryfootprinton2GBytesheapexpansion0500100015002000250030003500400045003264128256512102420484096BlocksizeMbytesmemorReservedMemoryInRecentWindowsVistaCommitedMemoryInRecentWindowsVistaReservedMemoryInWindowsServer2003CommitedMemoryInWindowsServer200342SummaryAttacksgetmoresophisticated…Butsodoestheheapmanagement–andnotonlyforsecurityWelaidthefoundationforincreasedagilityinheapimprovementswithreducedcompatibilityrisksImprovedscenariosforSMPandlargememoryusageDesignedtoenhancethecodequalityforapplicationsWearenotyetdone…wearelookingforwardforfurtherenhancementsasneededComeseemewithyourideas!
43ResourcesFeedbackonHeap:heapext@microsoft.
comDebuggingtools:http://www.
microsoft.
com/whdc/devtools/debugging/debugstart.
mspxApplicationVerifier:http://www.
microsoft.
com/downloads/details.
aspxFamilyID=bd02c19c-1250-433c-8c1b-2619bd93b3a2&DisplayLang=en4444secure@microsoft.
comThispresentationisforinformationalpurposesonly.
Microsoftmakesnowarranties,expressorimplied,inthissummary.
com2AgendaWindowsNTHeapManagementbasicsandevolutionWindowsVistaheap–majormilestone–Developmentprinciplesandguidelines–Securityfeatures–PerformancefeaturesQ&A3IntroductionSecurity–industry-wideconcernTwCdrivingmultiplesecurityinitiativesTheNTHeap–Strategicpointindefense–Improvedtorespondtoindustrytrendsinusage4PartI–Basics5HeapEvolutionTimeNT4NT4/SP4Windows2000XP/SP2Windows2003WindowsVistaBasicsPerformanceOpt-inSMPScalabilityHeapMitigationsEnhancedsecurityPerformanceQualitytoolIndustryWorkloadExploitationParallelism6NTHeapOverviewTheNTMemoryManagerSegmentManagement(forblocks1KNon-dedicatedfreelist(1–512KBytes)Segment1Segment64Segmentarray>512KVirtualBlocksList816>512K8HeapSegmentsSeg.
HB1B2UncommitedspaceBn…ByUncommitedspaceReservedspace9BlockEntryinpriorWindowsNTVersions0:018>dc04392f8004392f8000040002000000010442da6000240e68SizePreviousblocksizetagunusedbytesflagssegmentF-LinkB-Link10RoleofLinkEntryinEarlyExploitsArbitrarypointerwritemovmoveaxeax,DWORDPTR[,DWORDPTR[ecxecx]]movmovecxecx,DWORDPTR[ecx+4],DWORDPTR[ecx+4]movmovDWORDPTR[DWORDPTR[ecxecx],],eaxeaxmovmovDWORDPTR[eax+4],DWORDPTR[eax+4],ecxecxFwdLinkBkLinkValuetowriteLocationtowrite11LookasideListsNon-blockingsingle-linkedlists0-89-16Lookasidelists1016-1024HeaderLinkunusedHeaderLinkunused12TheLowFragmentationHeapArchitectureSMPUnit10-89-16Allocationbuckets1025-108815873-16384AllocationgranularitySMPUnitNSMPUnit1SegmentspoolSegmentspoolSegmentspool13LowFragmentationHeapBlockEntrySub-SegmentFlags…RelativelinkSizeLFHBlockFrees-listSub-Segment…8bytesUserdata14EarlyHeapMitigationsSafeListRemovalEntry->FwdLink->BkLink==Entry->BkLink->FwdLink==Entry8-bitcookietestedonfreeLFHblockentryencodingF(randomnumber,Blockaddress,heap)15ChangeinLandscapeNewexploitingmethodssurfacedChangeinusageoutlook–Memoryusage–IncreaseavailabilityofSMP–Increaserelevanceof64bitcomputingCodequality–higherdemandinindustry16WindowsVistaHeapManagerKeyDevelopmentDirectionsPerformanceandreliabilitySecurityCodequality17WindowsNTHeapRequirements18SecurityCorrectness–like:–Guaranteesrequestedsizes–Lifetimeofallocations–Clearingcontentwhenrequestedetc.
Defenselineinheapbasedexploits:Defenselineinheapbasedexploits:––AttemptstomitigatetheeffectofanattackAttemptstomitigatetheeffectofanattack––MakesdifficulthidingheapMakesdifficulthidingheap--basedexploitsbasedexploits19PerformanceScalefromsmalldevicestolargeserversOptimizedforvariedusagepatternsFollowtheindustrytrend–Memoryusage–IncreaseinSMPavailability–H/Warchitectureadvances20CompatibilityApplicationsmayrelyonthingslike:–Reallocreturningsamepointer–Read/writeafterreleasingablock–Doublefree–Overrunsoverunusedstructuresetc.
Heapchangesmayhaveunintendedeffects,suchas:–Crashes,leaksorbrokenfunctionalityinpoorlywrittenapplications–Severeperformanceregressions21PartII-WindowsVistaHeap22WindowsVistaHeapSecurityFeaturesBlockmetadatarandomizationIntegritycheckonblockentryAlgorithmvariationinresponsetousagepatternRandomrebasingFunctionpointerrandomizationAbruptapplicationterminationonerror23BlockMetadataRandomizationApartoftheheaderisXORdwitharandomvalueLowperformanceimpactShouldmakeguessingtherightvalueimpracticalFlexibleandcontainedalgorithmandimplementationAgileinupdates24EntryIntegrityCheckPrevious8-bitcookiehasbeenrepurposedtovalidatealargerpartoftheheaderValuemayberandomizedalongwiththeotherfieldsValidatedduringinternaloperationstoo25Demo–HeapHeaderLayout26Automatictuning–ShifttoLFHallocationsatarbitrarypointsonruntime–Triggersonvariouspatterns–Involvesalsode-commit/commitpoliciesRuntimeAlgorithmVariation27MoreHeapRandomizationsHeapbaserandomization–thingstoconsider:–Fragmentationoftheapplicationaddressspaceaffectinglargeserverapplications–PossibleperformanceissuesifhigherrandomizationisusedHeapfunctionpointerrandomization–Takesawayaknownplacetofacilitatethecodeexecutionalongwithrebasing28Demo29AbruptTerminationonErrorAnydatainconsistencyorinvalidheapfunctionusagedetectedmaytriggeritThescopeisprocess-wide(anyheapintheprocesshasthesamebehavior)TheprocessisterminatedviaWindowsErrorReportingDetailedinfoisavailableinthedumpfileNofunctionprovidedtodisableitOnbydefaultfor64bitplatforms&apps30TerminationonErrors(cont.
)Programmaticopt-Inmethod(newHeapEnableTerminationOnCorruptionclassdefined)BOOLHeapSetInformation(HANDLEHeapHandle,HEAP_INFORMATION_CLASSHeapInformationClass,PVOIDHeapInformation,SIZE_THeapInformationLength);LargenumberofcomponentswithWindowsVistaareoptedinTheinformationisavailableinadebuggerextension31Demo32NTHeapManager–ImprovesCodeQualityBenefitstoappdevelopersEarlyerrordetectionImproveddebuggingaidtoreducecostofinvestigatingcorruptionsReducedtolerancetomisusageWindowsVistaappswillbemoreresilienttofutureheapchanges33KnownAttackVectors&WindowsVistaRemovedlookasidelistandarrayofliststargetedbypreviousexploitsIntegritycheckonblockmetadatasignificantobstacletobruteforceattacksMostWindowsprocessesterminateonmemoryerrorsDynamic(runtime)changeinheapalgorithmsobstacletoconsistentexploitsHeapstructuresandmemorymgmtchangeslimitportabilityofexploits34SecurityenhancementsareajourneyMitigationsarenotsubstituteforgooddevelopmentpracticesWindowsVistaisjustamilestoneincontinualheapimprovements35WindowsVistaHeapPerf&ReliabilityImprovedscenariosbydefaultfor:SMPscalabilityExternalfragmentationLargeheapsImprovedreferencelocalityon64bitplatformsReducedVirtualAddressexhaustionIncreasedresiliencetopatternsinvolvinglong-termallocations36KeyPerformanceEnhancementsAutomatictuningLowergranularityofcontrolpoliciestoswitchtotheLowFragmentationHeapUseoflazyinitializationRedesignedsegmentmanagementImprovedinternallookupalgorithmsAddressedfragmentationinproblematicscenariosLoweroverheadon64bit37RandomAllocationBenchmark(0-1K)05101520253012345678MillionThreadsOps.
/secWindowsServer2003RecentWindowsVistaRandomAllocationBenchmark(4-8k)0246810121416182012345678MillionThreadsOps.
/secWindowsServer2003RecentWindowsVista38FragmentationTest(512blocks/80bytes)VirtualaddressCost010002000300040005000600070008000Runtime(sec)BytesperleakedbloRecentWindowsVistaWindowsServer2003Committedmemorycost0100200300400500600700800Runtime(sec)BytesperleakedbloRecentWindowsVistaWindowsServer200339FragmentationTest(512blocks/80bytes)Heapperformanceonheapexpansionpattern1(512blocks)(70x)0100000200000300000400000500000600000700000800000Runtime(sec)Ops.
/secRecentWindowsVistaWindowsServer200340FragmentationScenarioIIPatternPatternOps/secOps/sec(Recent(RecentWindowsWindowsVista)Vista)Ops/secOps/sec(Windows(WindowsServerServer2003SP1)2003SP1)ImprovemeImprovementntxx2562576004388663951292770915161441024403774517917204819418025776740968253412687841Memoryfootprinton2GBytesheapexpansion0500100015002000250030003500400045003264128256512102420484096BlocksizeMbytesmemorReservedMemoryInRecentWindowsVistaCommitedMemoryInRecentWindowsVistaReservedMemoryInWindowsServer2003CommitedMemoryInWindowsServer200342SummaryAttacksgetmoresophisticated…Butsodoestheheapmanagement–andnotonlyforsecurityWelaidthefoundationforincreasedagilityinheapimprovementswithreducedcompatibilityrisksImprovedscenariosforSMPandlargememoryusageDesignedtoenhancethecodequalityforapplicationsWearenotyetdone…wearelookingforwardforfurtherenhancementsasneededComeseemewithyourideas!
43ResourcesFeedbackonHeap:heapext@microsoft.
comDebuggingtools:http://www.
microsoft.
com/whdc/devtools/debugging/debugstart.
mspxApplicationVerifier:http://www.
microsoft.
com/downloads/details.
aspxFamilyID=bd02c19c-1250-433c-8c1b-2619bd93b3a2&DisplayLang=en4444secure@microsoft.
comThispresentationisforinformationalpurposesonly.
Microsoftmakesnowarranties,expressorimplied,inthissummary.
- demandvista系统优化相关文档
- 阵列vista系统优化
- 成像vista系统优化
- 接口vista系统优化
- 设置vista系统优化
- designedvista系统优化
- 映像vista系统优化
UCloud年度大促活动可选香港云服务器低至年134元
由于行业需求和自媒体的倾向问题，对于我们个人站长建站的方向还是有一些需要改变的。传统的个人网站建站内容方向可能会因为自媒体的分流导致个人网站很多行业不再成为流量的主导。于是我们很多个人网站都在想办法进行重新更换行业，包括前几天也有和网友在考虑是不是换个其他行业做做。这不有重新注册域名重新更换。鉴于快速上手的考虑还是采用香港服务器，这不腾讯云和阿里云早已不是新账户，考虑到新注册UCLOUD账户还算比...
Hostigger不限流量VPS年20美元
Hostigger 主机商在前面的文章中也有介绍过几次，这个商家运营时间是有一些年份，只不过在我们圈内好像之前出现的次数不多。最近这段时间商家有提供不限流量的VPS主机，逐渐的慢慢被人认识到。在前面的介绍到他们提供的机房还是比较多的，比如土耳其、美国等。今天看到Hostigger 商家居然改动挺大的，原来蛮好的域名居然这次连带官方域名都更换掉去掉一个G（Hostiger ）。估摸着这个域名也是之前...
腾讯云CVM云服务器大硬盘方案400GB和800GB数据盘方案
最近看到群里的不少网友在搭建大数据内容网站，内容量有百万篇幅，包括图片可能有超过50GB，如果一台服务器有需要多个站点的话，那肯定默认的服务器50GB存储空间是不够用的。如果单独在购买数据盘会成本提高不少。这里我们看到腾讯云促销活动中有2款带大数据盘的套餐还是比较实惠的，一台是400GB数据盘，一台是800GB数据盘，适合他们的大数据网站。 直达链接 - 腾讯云 大数据盘套餐服务器这里我们看到当前...
vista系统优化为你推荐
-
郭彩妮台灣有什麽新的電視劇？湖南商标注册在湖南搞商标注册是代理好还是自己去好一点？湖南商标注册的流程又是什么样的呢？打开网页出现错误网页出现错误怎么解决?要最简单的那种公章制作如何制作公章pwlosera,pw是什么，是不认识的人发的短信。请解释::arm开发板ARM开发板和树莓派有什么区别不兼容安卓手机软件不兼容怎么办？直播加速怎么让已拍摄好的视频加速xp系统停止服务XP系统停止服务后电脑怎么办？2012年正月十五山西省太原市2012年正月十五活动的相关情况