Debugging Tools for Windows

!wudfext.wudfrequest

The !wudfext.wudfrequest extension displays information about an I/O request.

Syntax

!wudfext.wudfrequest pWDFRequest

pWDFRequest: Specifies the address of the WDFIoRequest interface to display information about. The !wudfext.wudfqueue extension command determines the address of WDFIoRequest.

DLL

Windows NT 4.0	Unavailable
Windows 2000	Unavailable
Windows XP and later	Wudfext.dll

Comments

The following is an example of the !wudfext.wudfrequest display:

kd> !wudfrequest 0x000fa530
CWdfIoRequest  0x000fa4b8
Type: WdfRequestRead
  IWDFIoQueue: 0x000f3500
Completed: No
Canceled: No
UM IRP: 0x00429108  UniqueId: 0xf4  Kernel Irp: 0x0x936ef160
  Type: WudfMsg_READ
  ClientProcessId: 0x1248
  Device Stack: 0x003be4e0
  IoStatus
    hrStatus: 0x0
    Information: 0x0
  Driver/Framework created IRP: No
  Data Buffer: 0x00000000 / 0
  IsFrom32BitProcess: Yes
  CancelFlagSet: No
  Cancel callback: 0x000fa534
  Total number of stack locations: 2
  CurrentStackLocation: 2 (StackLocation[ 1 ])
    StackLocation[ 0 ]
      UNINITIALIZED
  > StackLocation[ 1 ]
      IWDFRequest:  ????
      IWDFDevice:   0x000f2f80
      IWDFFile:     0x00418cf0
      Completion:
        Callback:   0x00000000
        Context:    0x00000000
      Parameters: (RequestType: WdfRequestRead)
        Buffer length:        0x400
        Key:                  0x00000000
        Offset:               0x0

Additional Information

For more information, see User-Mode Driver Framework Debugging.

Build machine: CAPEBUILD