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
IntoVPS：按小时计费KVM月费5美元起($0.0075/小时),6个机房可选
IntoVPS是成立于2004年的Hosterion SRL旗下于2009年推出的无管理型VPS主机品牌，商家提供基于OpenStack构建的VPS产品，支持小时计费是他的一大特色，VPS可选数据中心包括美国弗里蒙特、达拉斯、英国伦敦、荷兰和罗马尼亚等6个地区机房。商家VPS主机基于KVM架构，最低每小时0.0075美元起($5/月)。下面列出几款VPS主机配置信息。CPU：1core内存：2GB...
.asia域名是否适合做个人网站及.asia域名注册和续费成本
今天看到群里的老秦同学在布局自己的网站项目，这个同学还是比较奇怪的，他就喜欢用这些奇怪的域名。比如前几天看到有用.in域名，个人网站他用的.me域名不奇怪，这个还是常见的。今天看到他在做的一个范文网站的域名，居然用的是 .asia 后缀。问到其理由，是有不错好记的前缀。这里简单的搜索到.ASIA域名的新注册价格是有促销的，大约35元首年左右，续费大约是80元左右，这个成本算的话，比COM域名还贵。...
捷锐数据399/年、60元/季 ，香港CN2云服务器 4H4G10M
捷锐数据官网商家介绍捷锐数据怎么样？捷锐数据好不好?捷锐数据是成立于2018年一家国人IDC商家，早期其主营虚拟主机CDN，现在主要有香港云服、国内物理机、腾讯轻量云代理、阿里轻量云代理，自营香港为CN2+BGP线路，采用KVM虚拟化而且单IP提供10G流量清洗并且免费配备天机盾可达到屏蔽UDP以及无视CC效果。这次捷锐数据给大家带来的活动是香港云促销，总共放量40台点击进入捷锐数据官网优惠活动内...
vista系统优化为你推荐
-
ip地址是什么网络地址和IP地址有什么区别？主机地址是什么？郭吉军一个新的品牌，要怎么做网络推广自助建站自助建站可信吗？网站运营刚创业的网站运营怎么做？唱吧电脑版官方下载电脑怎么安装唱吧，要能用的，请教教程，谢谢怎么升级ios6苹果6怎么升级最新系统2012年正月十五2012年正月十五 几月几号机械键盘轴打游戏用机械键盘到底什么轴好？iphone6上市时间苹果6什么时候出？多少钱系统分析员如何成为系统分析师？