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
妮妮云36元,美国VPS洛杉矶 8核 8G 36元/月,香港葵湾 8核 8G
妮妮云的来历妮妮云是 789 陈总 张总 三方共同投资建立的网站 本着“良心 便宜 稳定”的初衷 为小白用户避免被坑妮妮云的市场定位妮妮云主要代理市场稳定速度的云服务器产品，避免新手购买云服务器的时候众多商家不知道如何选择，妮妮云就帮你选择好了产品，无需承担购买风险，不用担心出现被跑路 被诈骗的情况。妮妮云的售后保证妮妮云退款 通过于合作商的友好协商，云服务器提供2天内全额退款，超过2天不退款 物...
美国G口/香港CTG/美国T级超防云/物理机/CDN大促销 1核 1G 24元/月
[六一云迎国庆]转盘活动实物礼品美国G口/香港CTG/美国T级超防云/物理机/CDN大促销六一云 成立于2018年，归属于西安六一网络科技有限公司，是一家国内正规持有IDC ISP CDN IRCS电信经营许可证书的老牌商家。大陆持证公司受大陆各部门监管不好用支持退款退现，再也不怕被割韭菜了！主要业务有：国内高防云，美国高防云，美国cera大带宽，香港CTG,香港沙田CN2,海外站群服务，物理机，...
提速啦（69元起）香港大带宽CN2+BGP独享云服务器
香港大带宽服务器香港大带宽云服务器目前市场上可以选择的商家十分少，这次给大家推荐的是我们的老便宜提速啦的香港大带宽云服务器，默认通用BGP线路（即CN2+BGP）是由三网直连线路 中国电信骨干网以及HGC、NTT、PCCW等国际线路混合而成的高品质带宽（精品带宽）线路，可有效覆盖全球200多个国家和地区。（适用于绝大部分应用场景，适合国内外访客访问，域名无需备案）提速啦官网链接：点击进入香港Cer...
vista系统优化为你推荐
-
jolicloud怎么安装linux系统？中国论坛大全天涯论坛的网址？百度抢票浏览器手机百度浏览器抢票版根本就没预约抢票。噱头而已！伪静态伪静态和真静态哪种静态方式好照片转手绘如何把真人图片用photoshop做成手绘图片唱吧电脑版官方下载唱吧有电脑版吗唱吧电脑版官方下载唱吧有电脑版的么？ 在哪里下载啊？苹果5怎么越狱苹果5怎么越狱畅想中国用“心系祖国情,畅想中国梦”为题目的800字作文xp系统停止服务xp系统停止服务怎么办