資源逾時

在資源逾時期間，等候資源的執行緒將會中斷至核心偵錯工具，其中包含類似下列的訊息：

Resource @ 800e99c0
 ActiveCount = 0001  Flags = IsOwnedExclusive sharedWaiter
 NumberOfExclusiveWaiters = 0000
  Thread = 809cd2f0, Count = 01
  Thread = 809ebc50, Count = 01
  Thread = 00000000, Count = 00
  Thread = 00000000, Count = 00
  Thread = 00000000, Count = 00
NT!DbgBreakPoint+0x4:
800cee04: 000000ad callkd 

保留鎖定的執行緒是 (或多個執行緒列出的第一個執行緒，如果是共用鎖定) 。 若要檢查該執行緒，請在上一個範例 (809cd2f0 的執行緒識別碼上使用 ！thread 延伸模組) 。 這會為擁有資源的執行緒提供堆疊。 如果同時等候資源可供使用， ExpWaitForResourceExclusive 函式或 ExpWaitForResourceShared 函式將會在該執行緒的堆疊上。

ExpWaitForResourceXxx的第一個參數是等候的鎖定。 若要瞭解該資源，請使用！locks <資源識別碼>延伸模組，這可讓您檢查另一個執行緒。

如果您遇到未等候另一個資源的執行緒，該執行緒可能是問題的來源。 如需所有保留鎖定的清單，請在kd >提示字元中使用不含參數的！locks延伸模組。

範例

Resource @ fc664ee0                  // Here's the resource lock address

 ActiveCount = 0001  Flags = IsOwnedExclusive ExclusiveWaiter
 NumberOfExclusiveWaiters = 0001
  Thread = ffaf5410, Count = 01                // Here's the owning thread
  Thread = 00000000, Count = 00
ntoskrnl!_DbgBreakPoint:
80131400 cc               int     3

kd> kb                                        // Start with a stack
ChildEBP RetAddr  Args to Child
fcd44980 801154c0 fc664ee0 ffab45d0 00110001 ntoskrnl!_DbgBreakPoint
fcd4499c 80102521 fc664ee0 ffb08ea8 fcd44a4c ntoskrnl!_ExpWaitForResource+0x114        // Lock being waited on...

fcd449e8 fc6509fa e12597c8 fef27c08 fee4fca8 ntoskrnl!_ExAcquireResourceExclusiveLite+0xa5
00380020 00000000 00000000 00000000 00000000 nwrdr!_CreateScb+0x2ff

kd> !locks fc664ee0                      // !locks resource address gives lock info
Resource @ nwrdr!_NwScavengerSpinLock (0xfc664ee0)    Exclusively owned
    Contention Count = 45
    NumberOfExclusiveWaiters = 1
     Threads: ffaf5410-01                  // Owning thread again
1 total locks, 1 locks currently held

kd> !thread ffaf5410                     // Check the owning thread

THREAD ffaf5410  Cid e7.e8  Teb: 7ffde000 WAIT: (Executive) KernelMode Non-Alertable
    feecf698  SynchronizationEvent
IRP List:
    fef29208: (0006,00b8) Flags: 00000884  Mdl: feed8328
Not impersonating
Owning Process ffaf5690
WaitTime (seconds)      2781250
Context Switch Count    183175
UserTime                  0:00:23.0153
KernelTime                0:01:01.0187
Start Address 0x77f04644
Initial Sp fec6c000 Current Sp fec6b938
Priority 11 BasePriority 7 PriorityDecrement 0 DecrementCount 8

ChildEBP RetAddr  Args to Child
fec6b950 801044fc feecf668 feecf668 00000080 ntoskrnl!KiSwapContext+0x25
fec6b974 fc655976 feecf698 00000000 00000000 ntoskrnl!_KeWaitForSingleObject+0x218
fec6ba5c fc6509fa e1263968 fef29208 feecf668 nwrdr!_ExchangeWithWait+0x38
fec6ba28 fc6533e5 feecf668 e125b3c8 ffafae08 nwrdr!_CreateScb+0x2ff
fec6bac0 fc652f26 feecf668 fec6bae4 fef29208 nwrdr!_CreateRemoteFile+0x2c9
fec6bb6c fc652b14 feecf668 fef29208 fee50b60 nwrdr!_NwCommonCreate+0x3a2

fec6bbac 80107aea fee50b60 fef29208 804052ac nwrdr!_NwFsdCreate+0x56
fec6bbc0 80142792 fef37700 fec6bdbc fee50b28 ntoskrnl!IofCallDriver+0x38
fec6bd10 80145403 fee50b60 00000000 fec6bdbc ntoskrnl!_IopParseDevice+0x6a0
fec6bd7c 80144c0c 00000000 fec6be34 00000040 ntoskrnl!_ObpLookupObjectName+0x479
fec6be5c 80127803 0012dd64 00000000 80127701 ntoskrnl!_ObOpenObjectByName+0xa2
fec6bef4 801385c3 0012dd64 0012dd3c 00000000 ntoskrnl!_NtQueryAttributesFile+0xc1
fec6bef4 77f716ab 0012dd64 0012dd3c 00000000 ntoskrnl!_KiSystemService+0x83

0012dd20 00000000 00000000 00000000 00000000 ntdll!_ZwQueryAttributesFile+0xb